diff --git a/docs/Instruction/images/proverXL/30x30mm_cutout.jpg b/docs/Instruction/images/proverXL/30x30mm_cutout.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..0a522316f345c9884e49babc4f456b57c838b0eb
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diff --git a/docs/Instruction/images/proverXL/SVG image.nc b/docs/Instruction/images/proverXL/SVG image.nc
index 6fa8850a3aba21e590cdef6034e9fb6fcddb1a7e..7dafcfa56be407484305ce471e68b67ecc007394 100644
--- a/docs/Instruction/images/proverXL/SVG image.nc	
+++ b/docs/Instruction/images/proverXL/SVG image.nc	
@@ -1,4 +1,3 @@
-%
 G17
 G21
 G40
@@ -7,12 +6,9 @@ G54
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-M03
-G04 P1000
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 G01Z-0.2542 F150.0000
diff --git a/docs/Instruction/images/proverXL/gsender_homed.png b/docs/Instruction/images/proverXL/gsender_homed.png
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diff --git a/docs/Instruction/images/proverXL/gsender_jog.png b/docs/Instruction/images/proverXL/gsender_jog.png
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index 0000000000000000000000000000000000000000..2b7d3f30afa287c58be6dcdb2f46ff08d9d264ce
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diff --git a/docs/Instruction/images/proverXL/job_start.png b/docs/Instruction/images/proverXL/job_start.png
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index 0000000000000000000000000000000000000000..b25e5b876032fd71e907b294ce95c1d68c2e8b21
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diff --git a/docs/Instruction/images/proverXL/load_file.png b/docs/Instruction/images/proverXL/load_file.png
new file mode 100644
index 0000000000000000000000000000000000000000..a8f1677e77c07dab44a7caf49c02c86e928d7e71
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diff --git a/docs/Instruction/images/proverXL/mill_2D_PCB_svg.txt b/docs/Instruction/images/proverXL/mill_2D_PCB_svg.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9cd2ee7fee28a107ee8bc657d1787dbb62eb6851
--- /dev/null
+++ b/docs/Instruction/images/proverXL/mill_2D_PCB_svg.txt
@@ -0,0 +1 @@
+{"modules":{"0.47383876715576023":{"definition":"//\n// distance transform \n//    assumes thresholded image, with zero intensity exterior\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'distance transform'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         distance_transform()}}}\n//\n// outputs\n//\nvar outputs = {\n   distances:{type:'F32',\n      event:function(){\n         mod.distances.height = mod.input.height\n         mod.distances.width = mod.input.width\n         mods.output(mod,'distances',mod.distances)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   div.appendChild(document.createElement('br'))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// distance transform function\n//\nfunction distance_transform() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      mod.distances = new Float32Array(evt.data.buffer)\n      var imgbuf = new Uint8ClampedArray(h*w*4)\n      var dmax = -Number.MAX_VALUE\n      for (var y = 0; y < h; ++y) {\n         for (var x = 0; x < w; ++x) {\n            if (mod.distances[(h-1-y)*w+x] > dmax)\n               dmax = mod.distances[(h-1-y)*w+x]\n            }\n         }\n      var i\n      for (var y = 0; y < h; ++y) {\n         for (var x = 0; x < w; ++x) {\n            i = 255*mod.distances[(h-1-y)*w+x]/dmax\n            imgbuf[(h-1-y)*w*4+x*4+0] = i\n            imgbuf[(h-1-y)*w*4+x*4+1] = i\n            imgbuf[(h-1-y)*w*4+x*4+2] = i\n            imgbuf[(h-1-y)*w*4+x*4+3] = 255\n            }\n         }\n      var imgdata = new ImageData(imgbuf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.distances.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var ctx = mod.img.getContext(\"2d\")\n   ctx.putImageData(mod.input,0,0)\n   var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,\n      buffer:img.data.buffer},\n      [img.data.buffer])\n   }\n//\n// distance transform worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var ny = evt.data.height\n      var nx = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Float32Array(nx*ny)\n      function distance(g,x,y,i) {\n         return ((y-i)*(y-i)+g[i][x]*g[i][x])\n         }\n      function intersection(g,x,y0,y1) {\n         return ((g[y0][x]*g[y0][x]-g[y1][x]*g[y1][x]+y0*y0-y1*y1)/(2.0*(y0-y1)))\n         }\n      //\n      // allocate arrays\n      //\n      var g = []\n      for (var y = 0; y < ny; ++y)\n         g[y] = new Uint32Array(nx)\n      var h = []\n      for (var y = 0; y < ny; ++y)\n         h[y] = new Uint32Array(nx)\n      var distances = []\n      for (var y = 0; y < ny; ++y)\n         distances[y] = new Uint32Array(nx)\n      var starts = new Uint32Array(ny)\n      var minimums = new Uint32Array(ny)\n      var d\n      //\n      // column scan\n      //  \n      for (var y = 0; y < ny; ++y) {\n         //\n         // right pass\n         //\n         var closest = -nx\n         for (var x = 0; x < nx; ++x) {\n            if (input[(ny-1-y)*nx*4+x*4+0] != 0) {\n               g[y][x] = 0\n               closest = x\n               }\n            else\n               g[y][x] = (x-closest)\n            }\n         //\n         // left pass\n         //\n         closest = 2*nx\n         for (var x = (nx-1); x >= 0; --x) {\n            if (input[(ny-1-y)*nx*4+x*4+0] != 0)\n               closest = x\n            else {\n               d = (closest-x)\n               if (d < g[y][x])\n                  g[y][x] = d\n               }\n            }\n         }\n      //\n      // row scan\n      //\n      for (var x = 0; x < nx; ++x) {\n         var segment = 0\n         starts[0] = 0\n         minimums[0] = 0\n         //\n         // down \n         //\n         for (var y = 1; y < ny; ++y) {\n            while ((segment >= 0) &&\n               (distance(g,x,starts[segment],minimums[segment]) > distance(g,x,starts[segment],y)))\n               segment -= 1\n            if (segment < 0) {\n               segment = 0\n               minimums[0] = y\n               }\n            else {\n               newstart = 1+intersection(g,x,minimums[segment],y)\n               if (newstart < ny) {\n                  segment += 1\n                  minimums[segment] = y\n                  starts[segment] = newstart\n                  }\n               }\n            }\n         //\n         // up \n         //\n         for (var y = (ny-1); y >= 0; --y) {\n            d = Math.sqrt(distance(g,x,y,minimums[segment]))\n            output[(ny-1-y)*nx+x] = d\n            if (y == starts[segment])\n               segment -= 1\n            }\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"390.58350726962306","left":"3347.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.07944144280928633":{"definition":"//\n// edge detect\n//    green = interior, blue = exterior, red = boundary\n//    assumes input is thresholded\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'edge detect'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         edge_detect()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('green:interior, blue:exterior, red:boundary'))\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// edge detect\n//\nfunction edge_detect() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   webworker.postMessage({worker:worker.toString(),\n      height:mod.input.height,width:mod.input.width,\n      buffer:mod.input.data.buffer},\n      [mod.input.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Uint8ClampedArray(h*w*4)\n      var i00,i0m,i0p,im0,ip0,imm,imp,ipm,ipp,row,col\n      //\n      // find edges - interior\n      //\n      for (row = 1; row < (h-1); ++row) {\n         for (col = 1; col < (w-1); ++col) {\n            i00 = (input[(h-1-row)*w*4+col*4+0] \n                      +input[(h-1-row)*w*4+col*4+1] \n                      +input[(h-1-row)*w*4+col*4+2])\n            i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                      +input[(h-1-row)*w*4+(col+1)*4+1] \n                      +input[(h-1-row)*w*4+(col+1)*4+2])\n            ip0 = (input[(h-2-row)*w*4+col*4+0] \n                      +input[(h-2-row)*w*4+col*4+1] \n                      +input[(h-2-row)*w*4+col*4+2])\n            ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                      +input[(h-2-row)*w*4+(col+1)*4+1] \n                      +input[(h-2-row)*w*4+(col+1)*4+2])\n            i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                      +input[(h-1-row)*w*4+(col-1)*4+1] \n                      +input[(h-1-row)*w*4+(col-1)*4+2])\n            im0 = (input[(h-row)*w*4+col*4+0] \n                      +input[(h-row)*w*4+col*4+1] \n                      +input[(h-row)*w*4+col*4+2])\n            imm = (input[(h-row)*w*4+(col-1)*4+0] \n                      +input[(h-row)*w*4+(col-1)*4+1] \n                      +input[(h-row)*w*4+(col-1)*4+2])\n            imp = (input[(h-row)*w*4+(col+1)*4+0] \n                      +input[(h-row)*w*4+(col+1)*4+1] \n                      +input[(h-row)*w*4+(col+1)*4+2])\n            ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                      +input[(h-2-row)*w*4+(col-1)*4+1] \n                      +input[(h-2-row)*w*4+(col-1)*4+2])\n            if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp) \n               || (i00 != i0m) || (i00 != im0) || (i00 != imm)\n               || (i00 != imp) || (i00 != ipm)) {\n               output[(h-1-row)*w*4+col*4+0] = 255\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else if (i00 == 0) {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 255\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 255\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      //\n      // left and right edges\n      //\n      for (row = 1; row < (h-1); ++row) {\n         col = w-1\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         imm = (input[(h-row)*w*4+(col-1)*4+0] \n                   +input[(h-row)*w*4+(col-1)*4+1] \n                   +input[(h-row)*w*4+(col-1)*4+2])\n         ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                   +input[(h-2-row)*w*4+(col-1)*4+1] \n                   +input[(h-2-row)*w*4+(col-1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n        if ((i00 != i0m) || (i00 != ip0) || (i00 != ipm) \n           || (i00 != im0) || (i00 != imm)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         col = 0\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         imp = (input[(h-row)*w*4+(col+1)*4+0] \n                   +input[(h-row)*w*4+(col+1)*4+1] \n                   +input[(h-row)*w*4+(col+1)*4+2])\n         ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                   +input[(h-2-row)*w*4+(col+1)*4+1] \n                   +input[(h-2-row)*w*4+(col+1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n        if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp) \n           || (i00 != im0) || (i00 != imp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         }\n      //\n      // top and bottom edges\n      //\n      for (col = 1; col < (w-1); ++col) {\n         row = h-1\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         imm = (input[(h-row)*w*4+(col-1)*4+0] \n                   +input[(h-row)*w*4+(col-1)*4+1] \n                   +input[(h-row)*w*4+(col-1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         imp = (input[(h-row)*w*4+(col+1)*4+0] \n                   +input[(h-row)*w*4+(col+1)*4+1] \n                   +input[(h-row)*w*4+(col+1)*4+2])\n        if ((i00 != i0m) || (i00 != i0p) || (i00 != imm) \n           || (i00 != im0) || (i00 != imp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         row = 0\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                   +input[(h-2-row)*w*4+(col-1)*4+1] \n                   +input[(h-2-row)*w*4+(col-1)*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n         ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                   +input[(h-2-row)*w*4+(col+1)*4+1] \n                   +input[(h-2-row)*w*4+(col+1)*4+2])\n        if ((i00 != i0m) || (i00 != i0p) || (i00 != ipm) \n           || (i00 != ip0) || (i00 != ipp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         }\n      //\n      // corners\n      //\n      row = 0\n      col = 0\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                +input[(h-1-row)*w*4+(col+1)*4+1] \n                +input[(h-1-row)*w*4+(col+1)*4+2])\n      ip0 = (input[(h-2-row)*w*4+col*4+0] \n                +input[(h-2-row)*w*4+col*4+1] \n                +input[(h-2-row)*w*4+col*4+2])\n      ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                +input[(h-2-row)*w*4+(col+1)*4+1] \n                +input[(h-2-row)*w*4+(col+1)*4+2])\n      if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = 0\n      col = w-1\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                +input[(h-1-row)*w*4+(col-1)*4+1] \n                +input[(h-1-row)*w*4+(col-1)*4+2])\n      ip0 = (input[(h-2-row)*w*4+col*4+0] \n                +input[(h-2-row)*w*4+col*4+1] \n                +input[(h-2-row)*w*4+col*4+2])\n      ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                +input[(h-2-row)*w*4+(col-1)*4+1] \n                +input[(h-2-row)*w*4+(col-1)*4+2])\n      if ((i00 != i0m) || (i00 != ip0) || (i00 != ipm)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = h-1\n      col = 0\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                +input[(h-1-row)*w*4+(col+1)*4+1] \n                +input[(h-1-row)*w*4+(col+1)*4+2])\n      im0 = (input[(h-row)*w*4+col*4+0] \n                +input[(h-row)*w*4+col*4+1] \n                +input[(h-row)*w*4+col*4+2])\n      imp = (input[(h-row)*w*4+(col+1)*4+0] \n                +input[(h-row)*w*4+(col+1)*4+1] \n                +input[(h-row)*w*4+(col+1)*4+2])\n      if ((i00 != i0p) || (i00 != im0) || (i00 != imp)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = h-1\n      col = w-1\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                +input[(h-1-row)*w*4+(col-1)*4+1] \n                +input[(h-1-row)*w*4+(col-1)*4+2])\n      im0 = (input[(h-row)*w*4+col*4+0] \n                +input[(h-row)*w*4+col*4+1] \n                +input[(h-row)*w*4+col*4+2])\n      imm = (input[(h-row)*w*4+(col-1)*4+0] \n                +input[(h-row)*w*4+(col-1)*4+1] \n                +input[(h-row)*w*4+(col-1)*4+2])\n      if ((i00 != i0m) || (i00 != im0) || (i00 != imm)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1007.5835072696229","left":"3805.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.8903773266711255":{"definition":"//\n// orient edges\n//    input is green:interior, blue:exterior, red:boundary\n//    output is red 128:north,64:south, green 128:east,64:west, blue 128:start,64:stop\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'orient edges'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         var ctx = mod.display.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         orient_edges()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // off-screen display canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.display = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('red:north, dark red:south'))\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('green:east, dark green:west'))\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('blue:start, dark blue:stop'))\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.display,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// orient edges\n//\nfunction orient_edges() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      var disp = new Uint8ClampedArray(evt.data.display)\n      var dispdata = new ImageData(disp,w,h)\n      var ctx = mod.display.getContext(\"2d\")\n      ctx.putImageData(dispdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var w = mod.canvas.width\n      var h = mod.canvas.height\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,w,h)\n      ctx.drawImage(mod.display,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,\n      buffer:mod.input.data.buffer},\n      [mod.input.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Uint8ClampedArray(h*w*4)\n      var row,col\n      var boundary = 0\n      var interior = 1\n      var exterior = 2\n      var alpha = 3\n      var northsouth = 0\n      var north = 128\n      var south = 64\n      var eastwest = 1\n      var east = 128\n      var west = 64\n      var startstop = 2\n      var start = 128\n      var stop = 64\n      //\n      // orient body states\n      //\n      for (row = 1; row < (h-1); ++row) {\n         for (col = 1; col < (w-1); ++col) {\n            output[(h-1-row)*w*4+col*4+northsouth] = 0\n            output[(h-1-row)*w*4+col*4+eastwest] = 0\n            output[(h-1-row)*w*4+col*4+startstop] = 0\n            output[(h-1-row)*w*4+col*4+alpha] = 255\n            if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n               if ((input[(h-1-(row+1))*w*4+(col)*4+boundary] != 0)\n                  && ((input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)\n                  || (input[(h-1-(row+1))*w*4+(col+1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+northsouth] |= north\n               if ((input[(h-1-(row-1))*w*4+(col)*4+boundary] != 0)\n                  && ((input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)\n                  || (input[(h-1-(row-1))*w*4+(col-1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+northsouth] |= south\n               if ((input[(h-1-(row))*w*4+(col+1)*4+boundary] != 0)\n                  && ((input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)\n                  || (input[(h-1-(row-1))*w*4+(col+1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+eastwest] |= east\n               if ((input[(h-1-(row))*w*4+(col-1)*4+boundary] != 0)\n                  && ((input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)\n                  || (input[(h-1-(row+1))*w*4+(col-1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+eastwest] |= west\n               }\n            }\n         }\n      //\n      // orient edge states\n      //\n      for (col = 1; col < (w-1); ++col) {\n         row = 0\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if ((input[(h-1-(row+1))*w*4+(col)*4+boundary] != 0)\n               && (input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+northsouth] |= north\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            if (input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            }\n         row = h-1\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if (input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            if ((input[(h-1-(row-1))*w*4+(col)*4+boundary] != 0)\n               && (input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+northsouth] |= south\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            }\n         }\n      for (row = 1; row < (h-1); ++row) {\n         col = 0\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if ((input[(h-1-(row))*w*4+(col+1)*4+boundary] != 0)\n               && (input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+eastwest] |= east\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            if (input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            }\n         col = w-1\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if (input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            if ((input[(h-1-(row))*w*4+(col-1)*4+boundary] != 0)\n               && (input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+eastwest] |= west\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            }\n         }\n      //\n      // orient corner states (todo)\n      //\n      row = 0\n      col = 0\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = h-1\n      col = 0\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = 0\n      col = w-1\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = h-1\n      col = w-1\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      //\n      // invert background for display\n      //\n      var display = new Uint8ClampedArray(h*w*4)\n      var r,g,b,i\n      for (row = 0; row < h; ++row) {\n         for (col = 0; col < w; ++col) {\n            r = output[(h-1-row)*w*4+col*4+0]\n            g = output[(h-1-row)*w*4+col*4+1]\n            b = output[(h-1-row)*w*4+col*4+2]\n            i = r+g+b\n            if (i != 0) {            \n               display[(h-1-row)*w*4+col*4+0] = output[(h-1-row)*w*4+col*4+0]\n               display[(h-1-row)*w*4+col*4+1] = output[(h-1-row)*w*4+col*4+1]\n               display[(h-1-row)*w*4+col*4+2] = output[(h-1-row)*w*4+col*4+2]\n               display[(h-1-row)*w*4+col*4+3] = output[(h-1-row)*w*4+col*4+3]\n               }\n            else {\n               display[(h-1-row)*w*4+col*4+0] = 255\n               display[(h-1-row)*w*4+col*4+1] = 255\n               display[(h-1-row)*w*4+col*4+2] = 255\n               display[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      //\n      // return output\n      //\n      self.postMessage({buffer:output.buffer,display:display.buffer},[output.buffer,display.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"877.5835072696229","left":"3374.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.3135579179893032":{"definition":"//\n// distance transform \n//    assumes thresholded image, with zero intensity exterior\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'offset'\n//\n// initialization\n//\nvar init = function() {\n   mod.offset.value = ''\n   }\n//\n// inputs\n//\nvar inputs = {\n   distances:{type:'F32',\n      event:function(evt){\n         mod.distances = evt.detail\n         var h = mod.distances.height\n         var w = mod.distances.width\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.height = mod.distances.height \n         ctx.canvas.width = mod.distances.width\n         if (mod.offset.value != '')\n            offset()\n         }},\n   offset:{type:'number',\n      event:function(evt){\n         mod.offset.value = evt.detail\n         offset()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // offset value\n   //\n   div.appendChild(document.createTextNode('offset (pixels): '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         offset()\n         })\n      div.appendChild(input)\n      mod.offset = input\n   //\n   // view button\n   //\n   div.appendChild(document.createElement('br'))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// offset\n//\nfunction offset() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.distances.height\n      var w = mod.distances.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var offset = parseFloat(mod.offset.value)\n   webworker.postMessage({\n      height:mod.distances.height,width:mod.distances.width,\n      offset:offset,buffer:mod.distances.buffer})\n   }\n//\n// offset worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var offset = evt.data.offset\n      var input = new Float32Array(evt.data.buffer)\n      var output = new Uint8ClampedArray(4*h*w)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            if (input[(h-1-row)*w+col] <= offset) {\n               output[(h-1-row)*w*4+col*4+0] = 255\n               output[(h-1-row)*w*4+col*4+1] = 255\n               output[(h-1-row)*w*4+col*4+2] = 255\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"490.58350726962306","left":"3806.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.6488303557466412":{"definition":"//\n// image threshold\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'image threshold'\n//\n// initialization\n//\nvar init = function() {\n   mod.threshold.value = 0.5\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         threshold_image()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // threshold value\n   //\n   div.appendChild(document.createTextNode('threshold (0-1): '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         threshold_image()\n         })\n      div.appendChild(input)\n      mod.threshold = input\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// threshold image\n//\nfunction threshold_image() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var t = parseFloat(mod.threshold.value)\n   var ctx = mod.img.getContext(\"2d\")\n   ctx.putImageData(mod.input,0,0)\n   var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,threshold:t,\n      buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var t = evt.data.threshold\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var r,g,b,a,i\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            r = buf[(h-1-row)*w*4+col*4+0] \n            g = buf[(h-1-row)*w*4+col*4+1] \n            b = buf[(h-1-row)*w*4+col*4+2] \n            a = buf[(h-1-row)*w*4+col*4+3] \n            i = (r+g+b)/(3*255)\n            if (a == 0)\n               val = 255\n            else if (i > t)\n               var val = 255\n            else\n               var val = 0\n            buf[(h-1-row)*w*4+col*4+0] = val\n            buf[(h-1-row)*w*4+col*4+1] = val\n            buf[(h-1-row)*w*4+col*4+2] = val\n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"523.583507269623","left":"2835.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.2892270043957246":{"definition":"//\n// view toolpath\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// todo:\n//    erase and update new path\n//    show depth info\n//    show size\n//    calculate camera far\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'view toolpath'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   toolpath:{type:'object',\n      event:function(evt){\n         mod.path = evt.detail.path\n         mod.name = evt.detail.name\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         mod.depth = evt.detail.depth\n         show_path_info()\n         show_path()\n         outputs.toolpath.event()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   toolpath:{type:'object',\n      event:function(){\n         cmd = {}\n         cmd.path = mod.path\n         cmd.name = mod.name\n         cmd.dpi = mod.dpi\n         cmd.width = mod.width\n         cmd.height = mod.height\n         mods.output(mod,'toolpath',cmd)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // info\n   //\n   var text = document.createTextNode('name: ')\n      div.appendChild(text)\n      mod.nametext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(mm)')\n      div.appendChild(text)\n      mod.mmtext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(in)')\n      div.appendChild(text)\n      mod.intext = text\n   //\n   // view\n   //   \n   div.appendChild(document.createElement('br'))   \n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n         var text = document.createTextNode('view')\n            span.appendChild(text)\n         btn.appendChild(span)\n      btn.addEventListener('click',function(){\n         open_view_window()\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// show_path_info\n//\nfunction show_path_info() {\n   mod.nametext.nodeValue = 'name: '+mod.name\n   var width = (25.4*mod.width/mod.dpi).toFixed(3)\n   var height = (25.4*mod.height/mod.dpi).toFixed(3)\n   var depth = (25.4*mod.depth/mod.dpi).toFixed(3)\n   if (mod.depth == undefined)\n      mod.mmtext.nodeValue = width+' x '+height+' (mm)'\n   else\n      mod.mmtext.nodeValue = width+' x '+height+' x '+depth+' (mm)'\n   var width = (mod.width/mod.dpi).toFixed(3)\n   var height = (mod.height/mod.dpi).toFixed(3)\n   var depth = (mod.depth/mod.dpi).toFixed(3)\n   if (mod.depth == undefined)\n      mod.intext.nodeValue = width+' x '+height+' (in)'\n   else\n      mod.intext.nodeValue = width+' x '+height+' x '+depth+' (in)'\n   mods.fit(mod.div)\n   }\n//\n// show_path\n//\nfunction show_path() {\n   var scene = mod.scene\n   var camera = mod.camera\n   var renderer = mod.renderer\n   //\n   // check if view window open\n   //\n   if (mod.win == undefined) {\n      open_view_window()\n      return\n      }\n   //\n   // check for path\n   //\n   if (mod.path == undefined)\n      return\n   //\n   // clear scene, leave camera\n   //\n   var length = scene.children.length\n   for (var c = (length-1); c > 1; --c) {\n      scene.remove(scene.children[c])\n      }\n   //\n   // fit camera\n   //\n   mod.thetaxy = 0\n   mod.thetaz = 0\n   mod.r = mod.height/2\n   mod.x0 = mod.width/2\n   mod.y0 = mod.height/2\n   camera.position.set(mod.x0,mod.y0,mod.r)\n   camera.up = new THREE.Vector3(0,1,0)\n   camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n   camera.updateProjectionMatrix()\n   //\n   // draw segments\n   //\n   var arrow_size = 1+mod.width/200\n   var path = mod.path\n   for (var segment = 0; segment < path.length; ++segment) {\n      if (segment > 0)\n         add_arrow(path[segment-1][path[segment-1].length-1],path[segment][0],0xff0000,arrow_size)         \n      for (var point = 1; point < path[segment].length; ++point) {\n         add_arrow(path[segment][point-1],path[segment][point],0x0000ff,arrow_size)\n         }\n      }\n   //\n   // add axes\n   //\n   var length = mod.height/10\n   add_arrow([0,0,0],[length,0,0],0xff0000,arrow_size)\n   add_arrow([0,0,0],[0,length,0],0x00ff00,arrow_size)\n   add_arrow([0,0,0],[0,0,length],0x0000ff,arrow_size)\n   //\n   // render\n   //\n   update()\n   //\n   // add_arrow\n   //\n   function add_arrow(start,stop,color,size) {\n      var origin = new THREE.Vector3().fromArray(start)\n      if (mod.depth == undefined)\n         origin.z = 0\n      var end  = new THREE.Vector3().fromArray(stop)\n      if (mod.depth == undefined)\n         end.z = 0\n      var length = new THREE.Vector3().subVectors(end,origin).length()\n      if (length <= size) {\n         add_line(origin,end,color)\n         //length = 1.1*size\n         return\n         }\n      var direction = new THREE.Vector3().subVectors(end,origin).normalize()\n      var arrow = new THREE.ArrowHelper(direction,origin,length,color,size,size)\n      scene.add(arrow)\n      }\n   //\n   // add_line\n   //\n   function add_line(start,stop,colorhex) {\n      var geometry = new THREE.Geometry()\n      geometry.vertices.push(start,stop)\n      var material = new THREE.LineBasicMaterial({color:colorhex})\n      var line = new THREE.Line(geometry,material)\n      scene.add(line)\n      }\n   //\n   // update\n   //\n   function update() {\n\t   renderer.render(scene,camera)\n      }\n   }\n//\n// open_view_window\n//\nfunction open_view_window() {\n   //\n   // globals\n   //\n   var container,scene,camera,renderer,win,controls\n   //\n   // open the window\n   //\n   open_window()\n   //\n   // open_window\n   //\n   function open_window() {\n      //\n      // open window\n      //\n      win = window.open('')\n      mod.win = win\n      //\n      // load three.js\n      //\n      var script = document.createElement('script')\n      script.type = 'text/javascript'\n      script.onload = init_window\n      script.src = 'js/three.js/three.min.js'\n      mod.div.appendChild(script)\n      }\n   //\n   // init_window\n   //\n   function init_window() {\n      //\n      // close button\n      //\n      var btn = document.createElement('button')\n         btn.appendChild(document.createTextNode('close'))\n         btn.style.padding = mods.ui.padding\n         btn.style.margin = 1\n         btn.addEventListener('click',function(){\n            win.close()\n            mod.win = undefined\n            })\n         win.document.body.appendChild(btn)\n      //\n      // label text\n      //\n      var text = win.document.createTextNode(' left: pan, right: rotate, scroll: zoom')\n         win.document.body.appendChild(text)\n      //\n      // GL container\n      //\n      win.document.body.appendChild(document.createElement('br'))   \n      container = win.document.createElement('div')\n      container.style.overflow = 'hidden'\n      win.document.body.appendChild(container)\n      //\n      // event handlers\n      //\n      container.addEventListener('contextmenu',context_menu)\n      container.addEventListener('mousedown',mouse_down)\n      container.addEventListener('mouseup',mouse_up)\n      container.addEventListener('mousemove',mouse_move)\n      container.addEventListener('wheel',mouse_wheel)\n      //\n      // add scene\n      //\n\t   scene = new THREE.Scene()\n\t   mod.scene = scene\n\t   var width = win.innerWidth\n\t   var height = win.innerHeight\n\t   var aspect = width/height\n\t   var near = 0.1\n\t   var far = 1000000\n\t   camera = new THREE.PerspectiveCamera(90,aspect,near,far)\n\t   mod.camera = camera\n\t   scene.add(camera)\n\t   //\n\t   // add renderer\n\t   //\n      renderer = new THREE.WebGLRenderer({antialias:true})\n      mod.renderer = renderer\n      renderer.setClearColor(0xffffff)\n\t   renderer.setSize(width,height)\n\t   container.appendChild(renderer.domElement)\n      //\n      // show the path if available\n      //\n      show_path()\n      }\n   //\n   // context_menu\n   //\n   function context_menu(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      return (false)\n      }\n   //\n   // mouse_down\n   //\n   function mouse_down(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      mod.button = evt.button\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      }\n   //\n   // mouse_up\n   //\n   function mouse_up(evt) {\n      mod.button = undefined\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      }\n   //\n   // mouse_move\n   //\n   function mouse_move(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      var dx = evt.clientX-mod.x\n      var dy = evt.clientY-mod.y\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      if (mod.button == 0) {\n         mod.x0 += \n            Math.sin(mod.thetaz)*mod.height*dy/win.innerHeight\n            -Math.cos(mod.thetaz)*mod.width*dx/win.innerWidth\n         mod.y0 += \n            Math.cos(mod.thetaz)*mod.height*dy/win.innerHeight\n            +Math.sin(mod.thetaz)*mod.width*dx/win.innerWidth\n         camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t      camera.up = new THREE.Vector3(Math.sin(mod.thetaz),Math.cos(mod.thetaz),0)\n\t      camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n         camera.updateProjectionMatrix()\n\t      renderer.render(scene,camera)\n\t      }\n      else if (mod.button == 2) {\n         mod.thetaxy += dy/win.innerHeight\n         mod.thetaz += dx/win.innerWidth\n         camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t      camera.up = new THREE.Vector3(Math.sin(mod.thetaz),Math.cos(mod.thetaz),0)\n\t      camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n         camera.updateProjectionMatrix()\n\t      renderer.render(scene,camera)\n\t      }\n      }\n   //\n   // mouse_wheel\n   //\n   function mouse_wheel(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      var dy = evt.deltaY/win.innerHeight\n      mod.r += mod.height*dy\n      camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n      camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n      camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t   camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n      camera.updateProjectionMatrix()\n\t   renderer.render(scene,camera)\n      }\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1227.583507269623","left":"2165.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.9557599338778935":{"definition":"//\n// mill raster 2D\n//\n// Neil Gershenfeld\n// (c) Massachusetts Institute of Technology 2016\n//\n// This work may be reproduced, modified, distributed, performed, and\n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is\n// provided as is; no warranty is provided, and users accept all\n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'mill raster 2D'\n//\n// initialization\n//\nvar init = function() {\n   mod.dia_in.value = 0.0156\n   mod.dia_mm.value = 25.4*parseFloat(mod.dia_in.value)\n   mod.cut_in.value = 0.004\n   mod.cut_mm.value = 25.4*parseFloat(mod.cut_in.value)\n   mod.max_in.value = 0.004\n   mod.max_mm.value = 25.4*parseFloat(mod.max_in.value)\n   mod.number.value = 4\n   mod.stepover.value = 0.5\n   mod.merge.value = 1\n   mod.sort.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   imageInfo:{type:'object',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.width\n         ctx.canvas.height = mod.height\n         }},\n   path:{type:'array',\n      event:function(evt){\n         if (mod.label.nodeValue == 'calculating') {\n            draw_path(evt.detail)\n            accumulate_path(evt.detail)\n            mod.offsetCount += 1\n            if ((mod.offsetCount != parseInt(mod.number.value)) && (evt.detail.length > 0)) {\n               mod.offset += parseFloat(mod.stepover.value)\n               outputs.offset.event()\n               }\n            else {\n               mod.label.nodeValue = 'calculate'\n               mod.labelspan.style.fontWeight = 'normal'\n               merge_path()\n               clear_path()\n               draw_path(mod.path)\n               draw_connections()\n               add_depth()\n               outputs.toolpath.event()\n               }\n            }\n         }\n      },\n   settings:{type:'object',\n      event:function(evt){\n         set_values(evt.detail)\n         }\n      }\n   }\n//\n// outputs\n//\nvar outputs = {\n   diameter:{type:'number',\n      event:function(){\n         mods.output(mod,'diameter',Math.ceil(mod.dpi*mod.dia_in.value))\n         }\n      },\n   offset:{type:'number',\n      event:function(){\n         var pixels = mod.offset*parseFloat(mod.dia_in.value)*mod.dpi\n         mods.output(mod,'offset',pixels)\n         }\n      },\n   toolpath:{type:'object',\n      event:function(){\n         cmd = {}\n         cmd.path = mod.path\n         cmd.name = mod.name\n         cmd.dpi = mod.dpi\n         cmd.width = mod.width\n         cmd.height = mod.height\n         cmd.depth = mod.depth\n         mods.output(mod,'toolpath',cmd)\n         }\n      }\n   }\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // tool diameter\n   //\n   div.appendChild(document.createTextNode('tool diameter'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.dia_in.value = parseFloat(mod.dia_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.dia_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.dia_mm.value = parseFloat(mod.dia_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.dia_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // cut depth\n   //\n   div.appendChild(document.createTextNode('cut depth'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.cut_in.value = parseFloat(mod.cut_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.cut_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.cut_mm.value = parseFloat(mod.cut_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.cut_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // max depth\n   //\n   div.appendChild(document.createTextNode('max depth'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.max_in.value = parseFloat(mod.max_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.max_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.max_mm.value = parseFloat(mod.max_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.max_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // offset number\n   //\n   div.appendChild(document.createTextNode('offset number: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.number = input\n   div.appendChild(document.createTextNode(' (0 = fill)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // offset stepover\n   //\n   div.appendChild(document.createTextNode('offset stepover: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.stepover = input\n   div.appendChild(document.createTextNode(' (1 = diameter)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // direction\n   //\n   div.appendChild(document.createTextNode('direction: '))\n   div.appendChild(document.createTextNode('climb'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'direction'\n      input.id = mod.div.id+'climb'\n      input.checked = true\n      div.appendChild(input)\n      mod.climb = input\n   div.appendChild(document.createTextNode(' conventional'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'direction'\n      input.id = mod.div.id+'conventional'\n      div.appendChild(input)\n      mod.conventional = input\n   div.appendChild(document.createElement('br'))\n   //\n   // path merge\n   //\n   div.appendChild(document.createTextNode('path merge: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.merge = input\n   div.appendChild(document.createTextNode(' (1 = diameter)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // path order\n   //\n   div.appendChild(document.createTextNode('path order: '))\n   div.appendChild(document.createTextNode('forward'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'order'\n      input.id = mod.div.id+'forward'\n      input.checked = true\n      div.appendChild(input)\n      mod.forward = input\n   div.appendChild(document.createTextNode(' reverse'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'order'\n      input.id = mod.div.id+'reverse'\n      div.appendChild(input)\n      mod.reverse = input\n   div.appendChild(document.createElement('br'))\n   //\n   // sort distance\n   //\n   div.appendChild(document.createTextNode('sort distance: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.id = mod.div.id+'sort'\n      div.appendChild(input)\n      mod.sort = input\n   div.appendChild(document.createElement('br'))\n   //\n   // calculate\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n         var text = document.createTextNode('calculate')\n            mod.label = text\n            span.appendChild(text)\n         mod.labelspan = span\n         btn.appendChild(span)\n      btn.addEventListener('click',function(){\n         mod.label.nodeValue = 'calculating'\n         mod.labelspan.style.fontWeight = 'bold'\n         mod.offset = 0.5\n         mod.offsetCount = 0\n         mod.path = []\n         clear_path()\n         outputs.diameter.event()\n         outputs.offset.event()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createTextNode(' '))\n   //\n   // view\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var svg = document.getElementById(mod.div.id+'svg')\n         var clone = svg.cloneNode(true)\n         clone.setAttribute('width',mod.img.width)\n         clone.setAttribute('height',mod.img.height)\n         win.document.body.appendChild(clone)\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // on-screen SVG\n   //\n   var svgNS = \"http://www.w3.org/2000/svg\"\n   var svg = document.createElementNS(svgNS,\"svg\")\n   svg.setAttribute('id',mod.div.id+'svg')\n   svg.setAttributeNS(\"http://www.w3.org/2000/xmlns/\",\n      \"xmlns:xlink\",\"http://www.w3.org/1999/xlink\")\n   svg.setAttribute('width',mods.ui.canvas)\n   svg.setAttribute('height',mods.ui.canvas)\n   svg.style.backgroundColor = 'rgb(255,255,255)'\n   var g = document.createElementNS(svgNS,'g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   div.appendChild(svg)\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   }\n//\n// local functions\n//\n// set_values\n//\nfunction set_values(settings) {\n   for (var s in settings) {\n      switch(s) {\n         case 'tool diameter (in)':\n            mod.dia_in.value = settings[s]\n            mod.dia_mm.value = parseFloat(mod.dia_in.value)*25.4\n            break\n         case 'cut depth (in)':\n            mod.cut_in.value = settings[s]\n            mod.cut_mm.value = parseFloat(mod.cut_in.value)*25.4\n            break\n         case 'max depth (in)':\n            mod.max_in.value = settings[s]\n            mod.max_mm.value = parseFloat(mod.max_in.value)*25.4\n            break\n         case 'offset number':\n            mod.number.value = settings[s]\n            break\n         }\n      }\n   }\n//\n// clear_path\n//\nfunction clear_path() {\n   var svg = document.getElementById(mod.div.id+'svg')\n   svg.setAttribute('viewBox',\"0 0 \"+(mod.img.width-1)+\" \"+(mod.img.height-1))\n   var g = document.getElementById(mod.div.id+'g')\n   svg.removeChild(g)\n   var g = document.createElementNS('http://www.w3.org/2000/svg','g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   }\n//\n// accumulate_path\n//    todo: replace inefficient insertion sort\n//    todo: move sort out of main thread\n//\nfunction accumulate_path(path) {\n   var forward = mod.forward.checked\n   var conventional = mod.conventional.checked\n   var sort = mod.sort.checked\n   for (var segnew = 0; segnew < path.length; ++segnew) {\n      if (conventional)\n         path[segnew].reverse()\n      if (mod.path.length == 0)\n         mod.path.splice(0,0,path[segnew])\n      else if (sort) {\n         var xnew = path[segnew][0][0]\n         var ynew = path[segnew][0][1]\n         var dmin = Number.MAX_VALUE\n         var segmin = -1\n         for (var segold = 0; segold < mod.path.length; ++segold) {\n            var xold = mod.path[segold][0][0]\n            var yold = mod.path[segold][0][1]\n            var dx = xnew-xold\n            var dy = ynew-yold\n            var d = Math.sqrt(dx*dx+dy*dy)\n            if (d < dmin) {\n               dmin = d\n               segmin = segold\n               }\n            }\n         if (forward)\n            mod.path.splice(segmin+1,0,path[segnew])\n         else\n            mod.path.splice(segmin,0,path[segnew])\n         }\n      else {\n         if (forward)\n            mod.path.splice(mod.path.length,0,path[segnew])\n         else\n            mod.path.splice(0,0,path[segnew])\n         }\n      }\n   }\n//\n// merge_path\n//\nfunction merge_path() {\n   var dmerge = mod.dpi*parseFloat(mod.merge.value)*parseFloat(mod.dia_in.value)\n   var seg = 0\n   while (seg < (mod.path.length-1)) {\n      var xold = mod.path[seg][mod.path[seg].length-1][0]\n      var yold = mod.path[seg][mod.path[seg].length-1][1]\n      var xnew = mod.path[seg+1][0][0]\n      var ynew = mod.path[seg+1][0][1]\n      var dx = xnew-xold\n      var dy = ynew-yold\n      var d = Math.sqrt(dx*dx+dy*dy)\n      if (d < dmerge)\n         mod.path.splice(seg,2,mod.path[seg].concat(mod.path[seg+1]))\n      else\n         seg += 1\n      }\n   }\n//\n// add_depth\n//\nfunction add_depth() {\n   var cut = parseFloat(mod.cut_in.value)\n   var max = parseFloat(mod.max_in.value)\n   var newpath = []\n   for (var seg = 0; seg < mod.path.length; ++seg) {\n      var depth = cut\n      if ((mod.path[seg][0][0] == mod.path[seg][mod.path[seg].length-1][0])\n         && (mod.path[seg][0][0] == mod.path[seg][mod.path[seg].length-1][0])) {\n         var newseg = []\n         while (depth <= max) {\n            var idepth = -Math.round(mod.dpi*depth)\n            for (var pt = 0; pt < mod.path[seg].length; ++pt) {\n               var point = mod.path[seg][pt].concat(idepth)\n               newseg.splice(newseg.length,0,point)\n               }\n            if (depth == max)\n               break\n            depth += cut\n            if (depth > max)\n               depth = max\n            }\n         newpath.splice(newpath.length,0,newseg)\n         }\n      else {\n         var newseg = []\n         while (depth <= max) {\n            var idepth = -Math.round(mod.dpi*depth)\n            for (var pt = 0; pt < mod.path[seg].length; ++pt) {\n               var point = mod.path[seg][pt].concat(idepth)\n               newseg.splice(newseg.length,0,point)\n               }\n            newpath.splice(newpath.length,0,newseg)\n            newseg = []\n            if (depth == max)\n               break\n            depth += cut\n            if (depth > max)\n               depth = max\n            }\n         }\n      }\n   mod.path = newpath\n   mod.depth = Math.round(parseFloat(mod.max_in.value)*mod.dpi)\n   }\n//\n// draw_path\n//\nfunction draw_path(path) {\n   var g = document.getElementById(mod.div.id+'g')\n   var h = mod.img.height\n   var w = mod.img.width\n   var xend = null\n   var yend = null\n   //\n   // loop over segments\n   //\n   for (var segment = 0; segment < path.length; ++segment) {\n      if (path[segment].length > 1) {\n         //\n         // loop over points\n         //\n         for (var point = 1; point < path[segment].length; ++point) {\n            var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n            line.setAttribute('stroke','black')\n            line.setAttribute('stroke-width',1)\n            line.setAttribute('stroke-linecap','round')\n            var x1 = path[segment][point-1][0]\n            var y1 = h-path[segment][point-1][1]-1\n            var x2 = path[segment][point][0]\n            var y2 = h-path[segment][point][1]-1\n            xend = x2\n            yend = y2\n            line.setAttribute('x1',x1)\n            line.setAttribute('y1',y1)\n            line.setAttribute('x2',x2)\n            line.setAttribute('y2',y2)\n            var dx = x2-x1\n            var dy = y2-y1\n            var d = Math.sqrt(dx*dx+dy*dy)\n            if (d > 0) {\n               nx = 6*dx/d\n               ny = 6*dy/d\n               var tx = 3*dy/d\n               var ty = -3*dx/d\n               g.appendChild(line)\n               triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n               triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                  +' '+(x2-nx-tx)+','+(y2-ny-ty))\n               triangle.setAttribute('fill','black')\n               g.appendChild(triangle)\n               }\n            }\n         }\n      }\n   }\n//\n// draw_connections\n//\nfunction draw_connections() {\n   var g = document.getElementById(mod.div.id+'g')\n   var h = mod.img.height\n   var w = mod.img.width\n   //\n   // loop over segments\n   //\n   for (var segment = 1; segment < mod.path.length; ++segment) {\n      //\n      // draw connection from previous segment\n      //\n      var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n      line.setAttribute('stroke','red')\n      line.setAttribute('stroke-width',1)\n      line.setAttribute('stroke-linecap','round')\n      var x1 = mod.path[segment-1][mod.path[segment-1].length-1][0]\n      var y1 = h-mod.path[segment-1][mod.path[segment-1].length-1][1]-1\n      var x2 = mod.path[segment][0][0]\n      var y2 = h-mod.path[segment][0][1]-1\n      line.setAttribute('x1',x1)\n      line.setAttribute('y1',y1)\n      line.setAttribute('x2',x2)\n      line.setAttribute('y2',y2)\n      var dx = x2-x1\n      var dy = y2-y1\n      var d = Math.sqrt(dx*dx+dy*dy)\n      if (d > 0) {\n         nx = 6*dx/d\n         ny = 6*dy/d\n         var tx = 3*dy/d\n         var ty = -3*dx/d\n         g.appendChild(line)\n         triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n         triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n            +' '+(x2-nx-tx)+','+(y2-ny-ty))\n         triangle.setAttribute('fill','red')\n         g.appendChild(triangle)\n         }\n      }\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n\n","top":"448.58350726962306","left":"2188.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.10309904694903338":{"definition":"//\n// vectorize\n//    input is red 128:north,64:south, green 128:east,64:west, blue 128:start,64:stop\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'vectorize'\n//\n// initialization\n//\nvar init = function() {\n   mod.error.value = 1\n   mod.sort.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         vectorize()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   path:{type:'array',\n      event:function(){\n         mods.output(mod,'path',mod.path)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen SVG\n   //\n   var svgNS = \"http://www.w3.org/2000/svg\"\n   var svg = document.createElementNS(svgNS,\"svg\")\n   svg.setAttribute('id',mod.div.id+'svg')\n   svg.setAttributeNS(\"http://www.w3.org/2000/xmlns/\",\n      \"xmlns:xlink\",\"http://www.w3.org/1999/xlink\")\n   svg.setAttribute('width',mods.ui.canvas)\n   svg.setAttribute('height',mods.ui.canvas)\n   svg.style.backgroundColor = 'rgb(255,255,255)'\n   var g = document.createElementNS(svgNS,'g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   div.appendChild(svg)\n   div.appendChild(document.createElement('br'))   \n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // error value\n   //\n   div.appendChild(document.createTextNode('vector fit (pixels): '))\n   //div.appendChild(document.createElement('br'))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         vectorize()\n         })\n      div.appendChild(input)\n      mod.error = input\n   div.appendChild(document.createElement('br'))\n   //\n   // sort\n   //\n   div.appendChild(document.createTextNode('sort distance: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.id = mod.div.id+'sort'\n      div.appendChild(input)\n      mod.sort = input\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var svg = document.getElementById(mod.div.id+'svg')\n         var clone = svg.cloneNode(true)\n         clone.setAttribute('width',mod.img.width)\n         clone.setAttribute('height',mod.img.height)\n         win.document.body.appendChild(clone)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// vectorize\n//\nfunction vectorize() {\n   //\n   // draw path\n   //\n   function draw_path(path) {\n      window.URL.revokeObjectURL(url)\n      var svg = document.getElementById(mod.div.id+'svg')\n      svg.setAttribute('viewBox',\"0 0 \"+(mod.img.width-1)+\" \"+(mod.img.height-1))\n      var g = document.getElementById(mod.div.id+'g')\n      svg.removeChild(g)\n      var g = document.createElementNS('http://www.w3.org/2000/svg','g')\n      g.setAttribute('id',mod.div.id+'g')\n      var h = mod.img.height\n      var w = mod.img.width\n      var xend = null\n      var yend = null\n      //\n      // loop over segments\n      //\n      for (var segment in path) {\n         if (path[segment].length > 1) {\n            if (xend != null) {\n               //\n               // draw connection from previous segment\n               //\n               var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n               line.setAttribute('stroke','red')\n               line.setAttribute('stroke-width',1)\n               line.setAttribute('stroke-linecap','round')\n               var x1 = xend\n               var y1 = yend\n               var x2 = path[segment][0][0]\n               var y2 = h-path[segment][0][1]-1\n               line.setAttribute('x1',x1)\n               line.setAttribute('y1',y1)\n               line.setAttribute('x2',x2)\n               line.setAttribute('y2',y2)\n               var dx = x2-x1\n               var dy = y2-y1\n               var d = Math.sqrt(dx*dx+dy*dy)\n               if (d > 0) {\n                  nx = 6*dx/d\n                  ny = 6*dy/d\n                  var tx = 3*dy/d\n                  var ty = -3*dx/d\n                  g.appendChild(line)\n                  triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n                  triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                     +' '+(x2-nx-tx)+','+(y2-ny-ty))\n                  triangle.setAttribute('fill','red')\n                  g.appendChild(triangle)\n                  }\n               }\n            //\n            // loop over points\n            //\n            for (var point = 1; point < path[segment].length; ++point) {\n               var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n               line.setAttribute('stroke','black')\n               line.setAttribute('stroke-width',1)\n               line.setAttribute('stroke-linecap','round')\n               var x1 = path[segment][point-1][0]\n               var y1 = h-path[segment][point-1][1]-1\n               var x2 = path[segment][point][0]\n               var y2 = h-path[segment][point][1]-1\n               xend = x2\n               yend = y2\n               line.setAttribute('x1',x1)\n               line.setAttribute('y1',y1)\n               line.setAttribute('x2',x2)\n               line.setAttribute('y2',y2)\n               var dx = x2-x1\n               var dy = y2-y1\n               var d = Math.sqrt(dx*dx+dy*dy)\n               if (d > 0) {\n                  nx = 6*dx/d\n                  ny = 6*dy/d\n                  var tx = 3*dy/d\n                  var ty = -3*dx/d\n                  g.appendChild(line)\n                  triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n                  triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                     +' '+(x2-nx-tx)+','+(y2-ny-ty))\n                  triangle.setAttribute('fill','black')\n                  g.appendChild(triangle)\n                  }\n               }\n            }\n         }\n      svg.appendChild(g)\n      }\n   //\n   // set up worker\n   //\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      webworker.terminate()\n      mod.path = evt.data.path\n      draw_path(mod.path)\n      outputs.path.event()\n      })\n   //\n   // call worker\n   //\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,sort:mod.sort.checked,\n      error:parseFloat(mod.error.value),\n      buffer:mod.input.data.buffer})\n   }\n//\n// vectorize worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var sort = evt.data.sort\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var northsouth = 0\n      var north = 128\n      var south = 64\n      var eastwest = 1\n      var east = 128\n      var west = 64\n      var startstop = 2\n      var start = 128\n      var stop = 64\n      var path = []\n      //\n      // edge follower\n      //\n      function follow_edges(row,col) {\n         if ((input[(h-1-row)*w*4+col*4+northsouth] != 0)\n            || (input[(h-1-row)*w*4+col*4+eastwest] != 0)) {\n            path[path.length] = [[col,row]]\n            while (1) {\n               if (input[(h-1-row)*w*4+col*4+northsouth] & north) {\n                  input[(h-1-row)*w*4+col*4+northsouth] =\n                     input[(h-1-row)*w*4+col*4+northsouth] & ~north\n                  row += 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+northsouth] & south) {\n                  input[(h-1-row)*w*4+col*4+northsouth] =\n                     input[(h-1-row)*w*4+col*4+northsouth] & ~south\n                  row -= 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+eastwest] & east) {\n                  input[(h-1-row)*w*4+col*4+eastwest] =\n                     input[(h-1-row)*w*4+col*4+eastwest] & ~east\n                  col += 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+eastwest] & west) {\n                  input[(h-1-row)*w*4+col*4+eastwest] =\n                     input[(h-1-row)*w*4+col*4+eastwest] & ~west\n                  col -= 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else\n                  break\n               }\n            }\n         }\n      //\n      // follow boundary starts\n      //\n      for (var row = 1; row < (h-1); ++row) {\n         col = 0\n         follow_edges(row,col)\n         col = w-1\n         follow_edges(row,col)\n         }\n      for (var col = 1; col < (w-1); ++col) {\n         row = 0\n         follow_edges(row,col)\n         row = h-1      \n         follow_edges(row,col)\n         }\n      //\n      // follow interior paths\n      //\n      for (var row = 1; row < (h-1); ++row) {\n         for (var col = 1; col < (w-1); ++col) {\n            follow_edges(row,col)\n            }\n         }\n      //\n      // vectorize path\n      //\n      var error = evt.data.error\n      var vecpath = []\n      for (var seg = 0; seg < path.length; ++seg) {\n         var x0 = path[seg][0][0]\n         var y0 = path[seg][0][1]\n         vecpath[vecpath.length] = [[x0,y0]]\n         var xsum = x0\n         var ysum = y0\n         var sum = 1\n         for (var pt = 1; pt < path[seg].length; ++pt) {\n            var xold = x\n            var yold = y\n            var x = path[seg][pt][0]\n            var y = path[seg][pt][1]\n            if (sum == 1) {\n               xsum += x\n               ysum += y\n               sum += 1\n               }\n            else {\n               var xmean = xsum/sum\n               var ymean = ysum/sum\n               var dx = xmean-x0\n               var dy = ymean-y0\n               var d = Math.sqrt(dx*dx+dy*dy)\n               var nx = dy/d\n               var ny = -dx/d\n               var l = Math.abs(nx*(x-x0)+ny*(y-y0))\n               if (l < error) {\n                  xsum += x\n                  ysum += y\n                  sum += 1\n                  }\n               else {\n                  vecpath[vecpath.length-1][vecpath[vecpath.length-1].length] = [xold,yold]\n                  x0 = xold\n                  y0 = yold\n                  xsum = xold\n                  ysum = yold\n                  sum = 1\n                  }\n               }\n            if (pt == (path[seg].length-1)) {\n               vecpath[vecpath.length-1][vecpath[vecpath.length-1].length] = [x,y]\n               }\n            }\n         }\n      //\n      // sort path\n      //\n      if ((vecpath.length > 1) && (sort == true)) {\n         var dmin = w*w+h*h\n         segmin = null\n         for (var seg = 0; seg < vecpath.length; ++seg) {\n            var x = vecpath[seg][0][0]\n            var y = vecpath[seg][0][0]\n            var d = x*x+y*y\n            if (d < dmin) {\n               dmin = d\n               segmin = seg\n               }\n            }\n         if (segmin != null) {\n            var sortpath = [vecpath[segmin]]\n            vecpath.splice(segmin,1)\n            }\n         while (vecpath.length > 0) {\n            var dmin = w*w+h*h\n            var x0 = sortpath[sortpath.length-1][sortpath[sortpath.length-1].length-1][0]\n            var y0 = sortpath[sortpath.length-1][sortpath[sortpath.length-1].length-1][1]\n            segmin = null\n            for (var seg = 0; seg < vecpath.length; ++seg) {\n               var x = vecpath[seg][0][0]\n               var y = vecpath[seg][0][1]\n               var d = (x-x0)*(x-x0)+(y-y0)*(y-y0)\n               if (d < dmin) {\n                  dmin = d\n                  segmin = seg\n                  }\n               }\n            if (segmin != null) {\n               sortpath[sortpath.length] = vecpath[segmin]\n               vecpath.splice(segmin,1)\n               }\n            }\n         }\n      else if (((vecpath.length > 1) && (sort == false)) || (vecpath.length == 1))\n         sortpath = vecpath\n      else\n         sortpath = []\n      //\n      // return path\n      //\n      self.postMessage({path:sortpath})\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"993.5835072696229","left":"2879.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.992472539363189":{"definition":"//\n// set object\n//\n// Neil Gershenfeld\n// (c) Massachusetts Institute of Technology 2018\n//\n// This work may be reproduced, modified, distributed, performed, and\n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is\n// provided as is; no warranty is provided, and users accept all\n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'set PCB defaults'\n//\n// initialization\n//\nvar init = function() {\n   //\n   add_output('mill traces (1/64)')\n   add_variable('tool diameter (in)','var00')\n   mod.var00.value = '0.0156'\n   add_variable('cut depth (in)','var01')\n   mod.var01.value = '0.004'\n   add_variable('max depth (in)','var02')\n   mod.var02.value = '0.004'\n   add_variable('offset number','var03')\n   mod.var03.value = '4'\n   //\n   add_output('mill outline (1/32)')\n   add_variable('tool diameter (in)','var10')\n   mod.var10.value = '0.0312'\n   add_variable('cut depth (in)','var11')\n   mod.var11.value = '0.010'\n   add_variable('max depth (in)','var12')\n   mod.var12.value = '0.072'\n   add_variable('offset number','var13')\n   mod.var13.value = '1'\n   //\n   }\n//\n// inputs\n//\nvar inputs = {}\n//\n// outputs\n//\nvar outputs = {\n   settings:{type:'',\n      event:function(vars){\n         mods.output(mod,'settings',vars)\n         }\n      }\n   }\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   }\n//\n// local functions\n//\nfunction add_output(label) {\n   if (mod.settings == undefined) {\n      mod.settings = {}\n      }\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n      var text = document.createTextNode(label)\n         span.appendChild(text)\n      btn.appendChild(span)\n      var f = function(label) {\n         btn.addEventListener('click',function() {\n            for (var s in mod.settings)\n               mod.settings[s].span.style.fontWeight = 'normal'\n            mod.settings[label].span.style.fontWeight = 'bold'\n            var vars = {}\n            for (var v in mod.settings[label].variables)\n               vars[v] = mod.settings[label].variables[v].value\n            outputs.settings.event(vars)\n            })\n         }(label)\n      mod.settings[label] = {span:span,variables:{}}\n      mod.div.appendChild(btn)\n      mod.setting = label\n   mod.div.appendChild(document.createElement('br'))\n   }\nfunction add_variable(label,variable) {\n   var text = document.createTextNode(label)\n      mod.div.appendChild(text)\n   mod.div.appendChild(document.createTextNode(': '))\n   input = document.createElement('input')\n      input.type = 'text'\n      input.size = 10\n      mod[variable] = input\n      mod.div.appendChild(input)\n   mod.settings[mod.setting].variables[label] = input \n   mod.div.appendChild(document.createElement('br'))\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"368.58350726962306","left":"1644.9944082591242","filename":"undefined","inputs":{},"outputs":{}},"0.8622681794886853":{"definition":"//\n// save file\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'save file'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   file:{type:'object',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.contents = evt.detail.contents\n         save_file()\n         }}}\n//\n// outputs\n//\nvar outputs = {}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // info\n   //\n   var text = document.createTextNode('name:')\n      div.appendChild(text)\n      mod.nametext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('size:')\n      div.appendChild(text)\n      mod.sizetext = text\n   div.appendChild(document.createElement('br'))\n   }\n//\n// local functions\n//\nfunction save_file() {\n   var a = document.createElement('a')\n   a.setAttribute('href','data:text/plain;charset=utf-8,'+ \n      encodeURIComponent(mod.contents))\n   a.setAttribute('download',mod.name)\n   a.style.display = 'none'\n   document.body.appendChild(a)\n   a.click()\n   document.body.removeChild(a)\n   mod.nametext.nodeValue = 'name: '+mod.name\n   mods.fit(mod.div)\n   mod.sizetext.nodeValue = 'size: '+mod.contents.length\n   mods.fit(mod.div)\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1215.9473065265367","left":"1684.9337776993061","filename":"modules/file/save","inputs":{},"outputs":{}},"0.057765477464730264":{"definition":"//\n// read SVG\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'read SVG'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   SVG:{type:'string',\n      event:function(evt) {\n         svg_load_handler({target:{result:evt.detail}})\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   SVG:{type:'string',\n      event:function(){\n         mods.output(mod,'SVG',mod.str)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // file input control\n   //\n   var file = document.createElement('input')\n      file.setAttribute('type','file')\n      file.setAttribute('id',div.id+'file_input')\n      file.style.position = 'absolute'\n      file.style.left = 0\n      file.style.top = 0\n      file.style.width = 0\n      file.style.height = 0\n      file.style.opacity = 0\n      file.addEventListener('change',function() {\n         svg_read_handler()\n         })\n      div.appendChild(file)\n      mod.file = file\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // file select button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('select SVG file'))\n      btn.addEventListener('click',function(){\n         var file = document.getElementById(div.id+'file_input')\n         file.value = null\n         file.click()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // info div\n   //\n   var info = document.createElement('div')\n      info.setAttribute('id',div.id+'info')\n      var text = document.createTextNode('file:')\n         info.appendChild(text)\n         mod.name = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('width:')\n         info.appendChild(text)\n         mod.width = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('height:')\n         info.appendChild(text)\n         mod.height = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('units per inch:')\n         info.appendChild(text)\n         mod.units = text\n      div.appendChild(info)\n   }\n//\n// local functions\n//\n// read handler\n//\nfunction svg_read_handler(event) {\n   //\n   // read as text\n   //\n   var file_reader = new FileReader()\n   file_reader.onload = svg_load_handler\n   var input_file = mod.file.files[0]\n   var file_name = input_file.name\n   mod.name.nodeValue = \"file: \"+file_name\n   file_reader.readAsText(input_file)\n   }\n//\n// load handler\n//\nfunction svg_load_handler(event) {\n   mod.str = event.target.result\n   //\n   // parse size\n   //\n   var i = mod.str.indexOf(\"width\")\n   if (i == -1) {\n      mod.width.nodeValue = \"width: not found\"\n      mod.height.nodeValue = \"height: not found\"\n      }\n   else {\n      var i1 = mod.str.indexOf(\"\\\"\",i+1)\n      var i2 = mod.str.indexOf(\"\\\"\",i1+1)\n      var width = mod.str.substring(i1+1,i2)\n      i = mod.str.indexOf(\"height\")\n      i1 = mod.str.indexOf(\"\\\"\",i+1)\n      i2 = mod.str.indexOf(\"\\\"\",i1+1)\n      var height = mod.str.substring(i1+1,i2)\n      ih = mod.str.indexOf(\"height\")\n      if (width.indexOf(\"px\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 90\n         }\n      else if (width.indexOf(\"mm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 25.4\n         }\n      else if (width.indexOf(\"cm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 2.54\n         }\n      else if (width.indexOf(\"in\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 1\n         }\n      else {\n         var units = 90\n         }\n      mod.width.nodeValue = \"width: \"+width\n      mod.height.nodeValue = \"height: \"+height\n      mod.units.nodeValue = \"units per inch: \"+units\n      }\n   //\n   // display\n   //\n   var img = new Image()\n   var src = \"data:image/svg+xml;base64,\"+window.btoa(mod.str)\n   img.setAttribute(\"src\",src)\n   img.onload = function() {\n      if (img.width > img.height) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-img.height/img.width)\n         var w = mod.canvas.width\n         var h = mod.canvas.width*img.height/img.width\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-img.width/img.height)\n         var y0 = 0\n         var w = mod.canvas.height*img.width/img.height\n         var h = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n         ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n         ctx.drawImage(img,x0,y0,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = img.width\n         ctx.canvas.height = img.height \n         ctx.drawImage(img,0,0)\n      outputs.SVG.event()\n      }\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"332.03488793999406","left":"837.5723969709061","filename":"modules/read/svg","inputs":{},"outputs":{}},"0.5022735462618486":{"definition":"//\n// convert SVG image\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2018\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'convert SVG image'\n//\n// initialization\n//\nvar init = function() {\n   mod.dpi.value = '1000'\n   }\n//\n// inputs\n//\nvar inputs = {\n   SVG:{type:'string',\n      event:function(evt){\n         mod.svg = evt.detail\n         get_size()\n         load_image()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}},\n   imageInfo:{type:'object',\n      event:function(){\n         var obj = {}\n         obj.name = \"SVG image\"\n         obj.dpi = parseFloat(mod.dpi.value)\n         obj.width = mod.img.width\n         obj.height = mod.img.height\n         mods.output(mod,'imageInfo',obj)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   //\n   // invert button\n   //\n   div.appendChild(document.createTextNode(' '))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('invert'))\n      btn.addEventListener('click',function(){\n         invert_image()\n         })\n      div.appendChild(btn)\n   //\n   // dpi\n   //\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('dpi: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         load_image()\n         })\n      div.appendChild(input)\n      mod.dpi = input\n   div.appendChild(document.createTextNode(' (enter)'))\n   //\n   // units\n   //\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('units: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         load_image()\n         })\n      div.appendChild(input)\n      mod.unitstext = input\n   div.appendChild(document.createTextNode(' (enter)'))\n   //\n   // fill\n   //\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('fill background: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.checked = true\n      input.id = mod.div.id+'fill'\n      div.appendChild(input)\n      mod.fill= input\n   //\n   // size\n   //\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('image size:')\n      div.appendChild(text)\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(pixels)')\n      div.appendChild(text)\n      mod.pixels = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(inches)')\n      div.appendChild(text)\n      mod.inches = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(mm)')\n      div.appendChild(text)\n      mod.mm = text\n   }\n//\n// local functions\n//\n// get size\n//\nfunction get_size() {\n   var i = mod.svg.indexOf(\"width\")\n   if (i == -1) {\n      var width = 1\n      var height = 1\n      var units = 90\n      }\n   else {\n      var i1 = mod.svg.indexOf(\"\\\"\",i+1)\n      var i2 = mod.svg.indexOf(\"\\\"\",i1+1)\n      var width = mod.svg.substring(i1+1,i2)\n      i = mod.svg.indexOf(\"height\")\n      i1 = mod.svg.indexOf(\"\\\"\",i+1)\n      i2 = mod.svg.indexOf(\"\\\"\",i1+1)\n      var height = mod.svg.substring(i1+1,i2)\n      ih = mod.svg.indexOf(\"height\")\n      if (width.indexOf(\"px\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 90\n         }\n      else if (width.indexOf(\"mm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 25.4\n         }\n      else if (width.indexOf(\"cm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 2.54\n         }\n      else if (width.indexOf(\"in\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 1\n         }\n      else {\n         var units = 90\n         }\n      }\n   mod.width = parseFloat(width)\n   mod.height = parseFloat(height)\n   mod.units = units\n   mod.unitstext.value = units\n   }\n//\n// load image\n//\nfunction load_image() {\n   var src = \"data:image/svg+xml;base64,\"+window.btoa(mod.svg)\n   var img = new Image()\n   img.setAttribute(\"src\",src)\n   img.onload = function() {\n      var dpi = parseFloat(mod.dpi.value)\n      var units = parseFloat(mod.unitstext.value)\n      var width = parseInt(dpi*mod.width/units)\n      var height = parseInt(dpi*mod.height/units)\n      mod.pixels.nodeValue =\n         width+' x '+height+\" (pixels)\"\n      mod.inches.nodeValue =\n         (width/dpi).toFixed(3)+' x '+(height/dpi).toFixed(3)+\" (inches)\"\n      mod.mm.nodeValue =\n      (25.4*width/dpi).toFixed(3)+' x '+(25.4*height/dpi).toFixed(3)+\" (mm)\"\n      mod.img.width = width\n      mod.img.height = height\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.clearRect(0,0,width,height)\n      ctx.drawImage(img,0,0,width,height)\n      if (mod.fill.checked)\n         fill_image()\n      else\n         output_image()\n      }\n   }\n//\n// output_image\n//\nfunction output_image() {\n   if (mod.img.width > mod.img.height) {\n      var x0 = 0\n      var y0 = mod.canvas.height*.5*(1-mod.img.height/mod.img.width)\n      var w = mod.canvas.width\n      var h = mod.canvas.width*mod.img.height/mod.img.width\n      }\n   else {\n      var x0 = mod.canvas.width*.5*(1-mod.img.width/mod.img.height)\n      var y0 = 0\n      var w = mod.canvas.height*mod.img.width/mod.img.height\n      var h = mod.canvas.height\n      }\n   var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,w,h)\n   outputs.image.event()\n   outputs.imageInfo.event()\n   }\n//\n// fill image\n//\nfunction fill_image() {\n   var blob = new Blob(['('+fill_worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      output_image()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var h = mod.img.height\n   var w = mod.img.width\n   var ctx = mod.img.getContext(\"2d\")\n   var img = ctx.getImageData(0,0,w,h)\n   webworker.postMessage({\n      height:img.height,width:img.width,buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction fill_worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            alpha = buf[(h-1-row)*w*4+col*4+3]/255\n            buf[(h-1-row)*w*4+col*4+0] \n               = (1-alpha)*255+alpha*buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+1] \n               = (1-alpha)*255+alpha*buf[(h-1-row)*w*4+col*4+1] \n            buf[(h-1-row)*w*4+col*4+2] \n               = (1-alpha)*255+alpha*buf[(h-1-row)*w*4+col*4+2] \n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// invert image\n//\nfunction invert_image() {\n   var blob = new Blob(['('+invert_worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var h = mod.img.height\n   var w = mod.img.width\n   var ctx = mod.img.getContext(\"2d\")\n   var img = ctx.getImageData(0,0,w,h)\n   webworker.postMessage({\n      height:img.height,width:img.width,buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction invert_worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+0] \n               = 255-buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+1] \n               = 255-buf[(h-1-row)*w*4+col*4+1] \n            buf[(h-1-row)*w*4+col*4+2] \n               = 255-buf[(h-1-row)*w*4+col*4+2] \n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"438.69493521948414","left":"1211.852199242571","filename":"modules/convert/svg/image","inputs":{},"outputs":{}},"0.9604471250218796":{"definition":"//\n// path to G-code\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2018\n// \n// Updated: Steven Chew\n// Date:    Feb 20 2019\n// Comments: Added option to output in inch or mm\n// Date:... Oct 28 2019\n// Comments: Corrected feedrate conversion\n//           - inch/s to inch/min\n//...........- mm/s to mm/min\n//\n// Updated: Neil Gershenfeld\n// Date: Oct 28 2020\n// Comments: added mm/s vs mm/min option\n//\n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'path to G-code'\n//\n// initialization\n//\nvar init = function() {\n   mod.cutspeed.value = '2.5'\n   mod.plungespeed.value = '2.5'\n   mod.jogheight.value = '2'\n   mod.spindlespeed.value = '11000'\n   mod.tool.value = '1'\n   mod.coolantoff.checked = true\n   mod.formatMm.checked = true\n   mod.unitMinutes.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   path:{type:'',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.path = evt.detail.path\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         make_path()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   file:{type:'',\n      event:function(str){\n         obj = {}\n         obj.name = mod.name+\".nc\"\n         obj.contents = str\n         mods.output(mod,'file',obj)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // cut speed\n   //\n   div.appendChild(document.createTextNode('cut speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.cutspeed = input\n   div.appendChild(document.createTextNode(' (mm/s)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // plunge speed\n   //\n   div.appendChild(document.createTextNode('plunge speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.plungespeed = input\n   div.appendChild(document.createTextNode(' (mm/s)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // jog height\n   //\n   div.appendChild(document.createTextNode('jog height: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.jogheight = input\n   div.appendChild(document.createTextNode(' (mm)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // spindle speed\n   //\n   div.appendChild(document.createTextNode('spindle speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.spindlespeed = input\n   div.appendChild(document.createTextNode(' (RPM)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // tool\n   //\n   div.appendChild(document.createTextNode('tool: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.tool = input\n   div.appendChild(document.createElement('br'))\n   //\n   // coolant\n   //\n   div.appendChild(document.createTextNode('coolant:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'coolant'\n      input.id = mod.div.id+'coolanton'\n      div.appendChild(input)\n      mod.coolanton = input\n   div.appendChild(document.createTextNode('on'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'coolant'\n      input.id = mod.div.id+'coolantoff'\n      div.appendChild(input)\n      mod.coolantoff = input\n   div.appendChild(document.createTextNode('off'))\n   div.appendChild(document.createElement('br'))\n   //\n   // inch or mm format\n   //\n   div.appendChild(document.createTextNode('format:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'format'\n      input.id = mod.div.id+'formatInch'\n      input.checked = true\n      div.appendChild(input)\n      mod.formatInch = input\n   div.appendChild(document.createTextNode('inch'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'format'\n      input.id = mod.div.id+'formatMm'\n      div.appendChild(input)\n      mod.formatMm = input\n   div.appendChild(document.createTextNode('mm'))\n   div.appendChild(document.createElement('br'))\n   //\n   // second or minute rate units \n   //\n   div.appendChild(document.createTextNode('rate units:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'units'\n      input.id = mod.div.id+'unitSeconds'\n      input.checked = true\n      div.appendChild(input)\n      mod.unitSeconds = input\n   div.appendChild(document.createTextNode('second'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'units'\n      input.id = mod.div.id+'unitMinutes'\n      div.appendChild(input)\n      mod.unitMinutes = input\n   div.appendChild(document.createTextNode('minute'))\n   }\n//\n// local functions\n//\nfunction make_path() {\n   var dx = 25.4*mod.width/mod.dpi\n   var cut_speed = parseFloat(mod.cutspeed.value)\n   var plunge_speed = parseFloat(mod.plungespeed.value)\n   var jog_height = parseFloat(mod.jogheight.value)\n   var nx = mod.width\n   var scale = dx/(nx-1)\n   var in_mm_scale = 1\n   if (mod.formatInch.checked) {\n      dx /= 25.4\n      scale /= 25.4\n      cut_speed /= 25.4\n      plunge_speed /= 25.4\n      jog_height /= 25.4\n      }\n   if (mod.unitMinutes.checked) {\n      cut_speed *= 60\n      plunge_speed *= 60\n      }\n   var spindle_speed = parseFloat(mod.spindlespeed.value)\n   var tool = parseInt(mod.tool.value)\n   str = \"%\\n\" // tape start\n   str += \"G17\\n\" // xy plane\n   if (mod.formatInch.checked)\n      str += \"G20\\n\" // inches\n   if (mod.formatMm.checked)\n      str += \"G21\\n\" // mm\n   str += \"G40\\n\" // cancel tool radius compensation\n   str += \"G49\\n\" // cancel tool length compensation\n   str += \"G54\\n\" // coordinate system 1\n   str += \"G80\\n\" // cancel canned cycles\n   str += \"G90\\n\" // absolute coordinates\n   str += \"G94\\n\" // feed/minute units\n   str += \"T\"+tool+\"M06\\n\" // tool selection, tool change\n   str += \"F\"+cut_speed.toFixed(4)+\"\\n\" // feed rate\n   str += \"S\"+spindle_speed+\"\\n\" // spindle speed\n   if (mod.coolanton.checked)\n      str += \"M08\\n\" // coolant on\n   str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\" // move up before starting spindle\n   str += \"M03\\n\" // spindle on clockwise\n　//str += \"G04 P1000\\n\" // give spindle 1 second to spin up................comment out\n   //str += \"G04 P1\\n\" // give spindle 1 Millisecond to spin up..............comment out\n   //\n   // follow segments\n   //\n   for (var seg = 0; seg < mod.path.length; ++seg) {\n      //\n      // move up to starting point\n      //\n      x = scale*mod.path[seg][0][0]\n      y = scale*mod.path[seg][0][1]\n      str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\"\n      str += \"G00X\"+x.toFixed(4)+\"Y\"+y.toFixed(4)+\"Z\"+jog_height.toFixed(4)+\"\\n\"\n      //\n      // move down\n      //\n      z = scale*mod.path[seg][0][2]\n      str += \"G01Z\"+z.toFixed(4)+\" F\"+plunge_speed.toFixed(4)+\"\\n\"\n      str += \"F\"+cut_speed.toFixed(4)+\"\\n\" //restore xy feed rate\n      for (var pt = 1; pt < mod.path[seg].length; ++pt) {\n         //\n         // move to next point\n         //\n         x = scale*mod.path[seg][pt][0]\n         y = scale*mod.path[seg][pt][1]\n         z = scale*mod.path[seg][pt][2]\n         str += \"G01X\"+x.toFixed(4)+\"Y\"+y.toFixed(4)+\"Z\"+z.toFixed(4)+\"\\n\"\n         }\n      }\n   //\n   // finish\n   //\n   str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\" // move up before stopping spindle\n   str += \"M05\\n\" // spindle stop\n   if (mod.coolanton.checked)\n      str += \"M09\\n\" // coolant off\n   str += \"M30\\n\" // program end and reset\n   str += \"%\\n\" // tape end\n   //\n   // output file\n   //\n   outputs.file.event(str)\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n\n","top":"764.1683166499946","left":"1656.839479173399","filename":"modules/path/formats/g-code","inputs":{},"outputs":{}}},"links":["{\"source\":\"{\\\"id\\\":\\\"0.07944144280928633\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8903773266711255\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.47383876715576023\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"distances\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"distances\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.07944144280928633\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.6488303557466412\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.47383876715576023\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"offset\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"offset\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"toolpath\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.2892270043957246\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"toolpath\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.8903773266711255\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.10309904694903338\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.10309904694903338\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"path\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"path\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.992472539363189\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"settings\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"settings\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.5022735462618486\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.6488303557466412\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.5022735462618486\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"imageInfo\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"imageInfo\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.057765477464730264\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"SVG\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.5022735462618486\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"SVG\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.2892270043957246\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"toolpath\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9604471250218796\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"path\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9604471250218796\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"file\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8622681794886853\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"file\\\"}\"}"]}
\ No newline at end of file
diff --git a/docs/Instruction/images/proverXL/milled_bords_svg_png.jpg b/docs/Instruction/images/proverXL/milled_bords_svg_png.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..b4935ae8c3602c3aeb6b19e2111e8ef2f9e144f6
Binary files /dev/null and b/docs/Instruction/images/proverXL/milled_bords_svg_png.jpg differ
diff --git a/docs/Instruction/images/proverXL/mods/mill_2D_PCB_png.html b/docs/Instruction/images/proverXL/mods/mill_2D_PCB_png.html
new file mode 100644
index 0000000000000000000000000000000000000000..1624982511f1e1b9c4ea1db3d482f732daeb8014
--- /dev/null
+++ b/docs/Instruction/images/proverXL/mods/mill_2D_PCB_png.html
@@ -0,0 +1,1915 @@
+<html>
+<head><meta charset='utf-8'>
+<title>mods</title>
+</head>
+<body link='black' alink='black' vlink='black'>
+<script>
+//
+// mods.js
+//
+// Neil Gershenfeld
+// (c) Massachusetts Institute of Technology 2018
+//
+// This work may be reproduced, modified, distributed, performed, and
+// displayed for any purpose, but must acknowledge the mods
+// project. Copyright is retained and must be preserved. The work is
+// provided as is; no warranty is provided, and users accept all
+// liability.
+//
+// closure
+//
+(function(){
+//
+// globals
+//
+var mods = {}
+mods.mod = {}
+mods.globals = {}
+mods.ui = {source:null,
+   progname:'',
+   padding:7,
+   bezier:100,
+   canvas:250,
+   rows:5,
+   cols:20,
+   link_color:'rgb(0,0,128)',
+   link_highlight:'rgb(255,0,0)',
+   header:50,
+   selected:{},
+   mousedown:null,
+   menu:null,
+   top:null,
+   left:null,
+   xstart:null,
+   ystart:null,
+   xtrans:null,
+   ytrans:null
+   }
+//
+// UI
+//
+document.body.style.overflow = "hidden"
+function mods_transform() {
+   var transform = document.body.style.transform
+   var m = new DOMMatrix(getComputedStyle(document.body).transform)
+   var s = m.m11
+   var tx = m.m41/s
+   var ty = m.m42/s
+   var origin = document.body.style.transformOrigin
+      var pxx = origin.indexOf('px')
+      var ox = parseFloat(origin.slice(0,pxx))
+      var pxy = origin.indexOf('px',pxx+2)
+      var oy = parseFloat(origin.slice(pxx+2,pxy))
+   return({s:s,tx:tx,ty:ty,ox:ox,oy:oy})
+   }
+document.body.style.transform = 'scale(1) translate(0px,0px)'
+document.body.style.transformOrigin = '0px 0px'
+//
+// scroll wheel event
+//
+window.addEventListener('wheel',function(evt) {
+   /*
+   (xw+tx-ox)*s+ox = xs
+   xw = ox-tx+(xs-ox)/s
+   (xw+tx0-ox0)*s+ox0  = (xw+tx1-ox1)*s+ox1
+   (tx0-ox0)*s+ox0  = (tx1-ox1)*s+ox1
+   tx0+(ox1-ox0)+(ox0-ox1)/s  = tx1
+   tx0+(ox1-ox0)*(1-1/s)  = tx1
+   */
+   var el = document.elementFromPoint(evt.pageX,evt.pageY)
+   if ((el.tagName == "HTML") || (el.tagName == "BODY")) {
+      set_prompt('scroll to zoom')
+      evt.preventDefault()
+      evt.stopPropagation()
+      var t = mods_transform()
+      if (evt.deltaY > 0)
+         var scale = t.s*1.1
+      else
+         var scale = t.s*0.9
+      var tx = t.tx+(evt.pageX-t.ox)*(1-1/t.s)
+      var ty = t.ty+(evt.pageY-t.oy)*(1-1/t.s)
+      document.body.style.transform = `scale(${scale}) translate(${tx}px,${ty}px)`
+      document.body.style.transformOrigin = `${evt.pageX}px ${evt.pageY}px`
+      }
+   })
+//
+// body mouse events
+//
+window.addEventListener('mousedown',function(evt) {
+   //
+   // get element mouse is over
+   //
+   var el = document.elementFromPoint(evt.pageX,evt.pageY)
+   //
+   // check if on body
+   //
+   if ((el.tagName == "HTML") || (el.tagName == "BODY")) {
+      //
+      // remember button
+      //
+      mods.ui.mousedown = evt.button
+      if (mods.ui.mousedown == 0) {
+         set_prompt('left-drag to pan, right-drag to select')
+         if (mods.ui.menu != null) {
+            document.body.removeChild(mods.ui.menu)
+            mods.ui.menu = null
+            }
+         }
+      else if (mods.ui.mousedown == 2) {
+         set_prompt('menu; left-drag to pan, right-drag to select')
+         }
+      //
+      // remember position
+      //
+      var t = mods_transform()
+      mods.ui.xstart = evt.pageX
+      mods.ui.ystart = evt.pageY
+      mods.ui.xtrans = t.tx
+      mods.ui.ytrans = t.ty
+      }
+   })
+window.addEventListener('mousemove',function(evt) {
+   //
+   // mouse move
+   //
+   if (mods.ui.mousedown != null) {
+      evt.preventDefault()
+      evt.stopPropagation()
+      var t = mods_transform()
+      if (mods.ui.mousedown == 0) {
+         //
+         // pan on left drag
+         //
+         xtrans = mods.ui.xtrans+(evt.pageX-mods.ui.xstart)/t.s
+         ytrans = mods.ui.ytrans+(evt.pageY-mods.ui.ystart)/t.s
+         document.body.style.transform = `scale(${t.s}) translate(${xtrans}px,${ytrans}px)`
+         }
+      else if (mods.ui.mousedown == 2) {
+         //
+         // select on right drag
+         //
+         var rect = document.getElementById('svgrect')
+         if (rect == undefined) {
+            //
+            // start dragging
+            //
+            if (mods.ui.menu != null) {
+               document.body.removeChild(mods.ui.menu)
+               mods.ui.menu = null
+               }
+            set_prompt('right-drag to select')
+            var t = mods_transform()
+            var rect = document.createElementNS('http://www.w3.org/2000/svg','rect')
+               rect.setAttribute('id','svgrect')
+               rect.setAttribute('x',t.ox-t.tx+(evt.pageX-t.ox)/t.s)
+               rect.setAttribute('y',t.oy-t.ty+(evt.pageY-t.oy)/t.s-mods.ui.header)
+               rect.setAttribute('width',0)
+               rect.setAttribute('height',0)
+               rect.setAttribute('fill','rgb(200,200,200)')
+               rect.setAttribute('stroke','none')
+            var svg = document.getElementById('svg')
+               svg.insertBefore(rect,svg.firstChild)
+            }
+         else {
+            //
+            // continue dragging
+            //
+            var rect = document.getElementById('svgrect')
+            var xp = t.ox-t.tx+(mods.ui.xstart-t.ox)/t.s
+            var yp = t.oy-t.ty+(mods.ui.ystart-t.oy)/t.s-mods.ui.header
+            var xw = t.ox-t.tx+(evt.pageX-t.ox)/t.s
+            var yw = t.oy-t.ty+(evt.pageY-t.oy)/t.s-mods.ui.header
+            if (xw < xp) {
+               rect.setAttribute('x',xw)
+               rect.setAttribute('width',xp-xw)
+               }
+            else
+               rect.setAttribute('width',xw-xp)
+            if (yw < yp) {
+               rect.setAttribute('y',yw)
+               rect.setAttribute('height',yp-yw)
+               }
+            else
+               rect.setAttribute('height',yw-yp)
+            }
+         }
+      }
+   })
+window.addEventListener('mouseup',function(evt) {
+   //
+   // mouse up
+   //
+   mods.ui.mousedown = null
+   //
+   // check for selection rectangle
+   //
+   var rect = document.getElementById('svgrect')
+   if (rect != null) {
+      //
+      // rectangle exists, selecting modules
+      //
+      var x = parseFloat(rect.getAttribute('x'))
+      var y = parseFloat(rect.getAttribute('y'))
+      var width = parseFloat(rect.getAttribute('width'))
+      var height = parseFloat(rect.getAttribute('height'))
+      svg.removeChild(rect)
+      var modules = document.getElementById('modules')
+      //
+      // loop to find selected modules
+      //
+      mods.ui.selected = {}
+      for (var module in modules.childNodes) {
+         var container = modules.childNodes[module]
+         var id = container.id
+         if (id != undefined) {
+            var name = container.firstChild
+            var left = parseFloat(container.dataset.left)
+            var top = parseFloat(container.dataset.top)
+            if ((x <= left) && (left <= x+width) && (y <= top) && (top <= y+height)) {
+               //
+               // module is in selection rectangle
+               //
+               name.style.fontWeight = "bold"
+               mods.ui.selected[id] = true
+               }
+            else {
+               //
+               // module is not in selection rectangle
+               //
+               name.style.fontWeight = "normal"
+               }
+            }
+         }
+      }
+   })
+//
+// context menu
+//
+window.addEventListener('contextmenu',function(evt){
+   evt.stopPropagation()
+   evt.preventDefault()
+   if (mods.ui.menu != null) {
+      document.body.removeChild(mods.ui.menu)
+      mods.ui.menu = null
+      }
+   var div = document.createElement('div')
+   make_menu(div)
+   add_menu(div,'modules',modules)
+   add_menu(div,'programs',programs)
+   add_menu(div,'edit',edit)
+   add_menu(div,'options',options)
+   document.body.appendChild(div)
+   function make_menu(div) {
+      mods.ui.menu = div
+      div.style.position = "absolute"
+      var t = mods_transform()
+      div.style.top = t.oy-t.ty+(evt.pageY-t.oy)/t.s
+      div.style.left = t.ox-t.tx+(evt.pageX-t.ox)/t.s
+      div.style.zIndex = 0
+      div.style.cursor = 'default'
+      div.style.backgroundColor = "rgb(220,255,255)"
+      div.style.padding = 1.5*mods.ui.padding
+      div.style.textAlign = 'left'
+      div.style.border = '2px solid'
+      div.style.borderRadius = '10px'
+      }
+   function add_menu(div,text,click) {
+      var textdiv = document.createElement('div')
+      textdiv.appendChild(document.createTextNode(text))
+      textdiv.appendChild(document.createElement('br'))
+      textdiv.addEventListener('mouseover',function(evt){
+         evt.target.style.fontWeight = 'bold'})
+      textdiv.addEventListener('mouseout',function(evt){
+         evt.target.style.fontWeight = 'normal'})
+      textdiv.addEventListener('mousedown',click)
+      textdiv.addEventListener('touchend',click)
+      div.appendChild(textdiv)
+      }
+   //
+   // modules menu
+   //
+   function modules(evt) {
+      evt.preventDefault()
+      evt.stopPropagation()
+      document.body.removeChild(evt.target.parentNode)
+      var div = document.createElement('div')
+      make_menu(div)
+      set_prompt('modules')
+      //
+      // open server module
+      //
+      add_menu(div,'open server module',function(evt){
+         function module_label(label) {
+            var div = document.createElement('div')
+            var i = document.createElement('i')
+            i.appendChild(document.createTextNode(label))
+            div.appendChild(i)
+            div.appendChild(document.createElement('br'))
+            menu.appendChild(div)
+            }
+         function module_menu(label,module) {
+            var div = document.createElement('div')
+            div.appendChild(
+               document.createTextNode('\u00A0\u00A0\u00A0'+label))
+            div.addEventListener('mouseover',function(evt){
+               evt.target.style.fontWeight = 'bold'})
+            div.addEventListener('mouseout',function(evt){
+               evt.target.style.fontWeight = 'normal'})
+            div.addEventListener('mousedown',function(evt){
+               evt.preventDefault()
+               evt.stopPropagation()
+               document.body.removeChild(evt.target.parentNode)
+               mods.ui.menu = null
+               var t = mods_transform()
+               mod_message_handler(module,
+                  t.oy-t.ty+(evt.pageY-t.oy)/t.s,
+                  t.ox-t.tx+(evt.pageX-t.ox)/t.s)})
+            div.appendChild(document.createElement('br'))
+            menu.appendChild(div)
+            }
+         document.body.removeChild(evt.target.parentNode)
+         var menu = document.createElement('div')
+         make_menu(menu)
+         document.body.appendChild(menu)
+         menu.style.width = mods.ui.canvas
+         menu.style.height = mods.ui.canvas
+         menu.style.overflow = 'auto'
+         var req = new XMLHttpRequest()
+         req.responseType = 'text'
+         req.onreadystatechange = function() {
+            if (req.readyState == XMLHttpRequest.DONE) {
+               var str = req.response
+               eval(str)
+               }
+            }
+         req.open('GET','modules/index.js'+'?rnd='+Math.random())
+         req.send()
+         })
+      //
+      // open local module
+      //
+      add_menu(div,'open local module',function(evt){
+         var t = mods_transform()
+         mods.ui.top = t.oy-t.ty+(evt.pageY-t.oy)/t.s
+         mods.ui.left = t.ox-t.tx+(evt.pageX-t.ox)/t.s
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         var file = document.getElementById('mod_input')
+         file.value = null
+         file.click()
+         })
+      //
+      // open remote module
+      //
+      add_menu(div,'open remote module',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         set_prompt('remotes not yet implemented')
+         })
+      document.body.appendChild(div)
+      }
+   //
+   // programs menu
+   //
+   function programs(evt) {
+      evt.preventDefault()
+      evt.stopPropagation()
+      document.body.removeChild(evt.target.parentNode)
+      var div = document.createElement('div')
+      make_menu(div)
+      set_prompt('programs')
+      //
+      // open local program
+      //
+      add_menu(div,'open local program',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         var file = document.getElementById('prog_input')
+         file.value = null
+         file.click()
+         })
+      //
+      // open server program
+      //
+      add_menu(div,'open server program',function(evt){
+         function program_label(label) {
+            var div = document.createElement('div')
+            var i = document.createElement('i')
+            i.appendChild(document.createTextNode(label))
+            div.appendChild(i)
+            div.appendChild(document.createElement('br'))
+            menu.appendChild(div)
+            }
+         function program_menu(label,program) {
+            var div = document.createElement('div')
+            div.appendChild(
+               document.createTextNode('\u00A0\u00A0\u00A0'+label))
+            div.addEventListener('mouseover',function(evt){
+               evt.target.style.fontWeight = 'bold'})
+            div.addEventListener('mouseout',function(evt){
+               evt.target.style.fontWeight = 'normal'})
+            div.addEventListener('mousedown',function(evt){
+               evt.preventDefault()
+               evt.stopPropagation()
+               if (location.port == 80)
+                  var uri = 'http://'+location.hostname
+                     +'?program='+program
+               else
+                  var uri = 'http://'+location.hostname+':'
+                     +location.port+'?program='+program
+               set_prompt('<a href='+uri+'>program link</a>')
+               prog_message_handler(program)
+               document.body.removeChild(evt.target.parentNode)
+               mods.ui.menu = null
+               })
+            div.appendChild(document.createElement('br'))
+            menu.appendChild(div)
+            }
+         document.body.removeChild(evt.target.parentNode)
+         var menu = document.createElement('div')
+         make_menu(menu)
+         document.body.appendChild(menu)
+         menu.style.width = mods.ui.canvas
+         menu.style.height = mods.ui.canvas
+         menu.style.overflow = 'auto'
+         var req = new XMLHttpRequest()
+         req.responseType = 'text'
+         req.onreadystatechange = function() {
+            if (req.readyState == XMLHttpRequest.DONE) {
+               var str = req.response
+               eval(str)
+               }
+            }
+         req.open('GET','programs/index.js'+'?rnd='+Math.random())
+         req.send()
+         })
+      //
+      // open remote program
+      //
+      add_menu(div,'open remote program',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         set_prompt('remotes not yet implemented')
+         })
+      //
+      // save local program
+      //
+      add_menu(div,'save local program',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         save_program()
+         })
+      //
+      // save local page
+      //
+      add_menu(div,'save local page',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         save_page()
+         })
+      document.body.appendChild(div)
+      }
+   //
+   // edit menu
+   //
+   function edit(evt) {
+      evt.preventDefault()
+      evt.stopPropagation()
+      document.body.removeChild(evt.target.parentNode)
+      var div = document.createElement('div')
+      make_menu(div)
+      set_prompt('edit')
+      //
+      // cut
+      //
+      add_menu(div,'cut',function(evt){
+         evt.preventDefault()
+         evt.stopPropagation()
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         if ((Object.keys(mods.ui.selected).length) == 0) {
+            set_prompt("nothing selected")
+            }
+         else {
+            for (var id in mods.ui.selected) {
+               var div = document.getElementById(id)
+               delete_module(id)
+               mods.ui.selected = {}
+               }
+            }
+         })
+      //
+      // copy
+      //
+      add_menu(div,'copy',function(evt){
+         evt.preventDefault()
+         evt.stopPropagation()
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         set_prompt('copy not yet implemented')
+         })
+      //
+      // paste
+      //
+      add_menu(div,'paste',function(evt){
+         evt.preventDefault()
+         evt.stopPropagation()
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         set_prompt('paste not yet implemented')
+         })
+      document.body.appendChild(div)
+      }
+   //
+   // options menu
+   //
+   function options(evt) {
+      evt.preventDefault()
+      evt.stopPropagation()
+      document.body.removeChild(evt.target.parentNode)
+      mods.ui.menu = null
+      var div = document.createElement('div')
+      make_menu(div)
+      set_prompt('options')
+      //
+      // view files
+      //
+      add_menu(div,'view files',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         var win = window.open('files.html')
+         })
+      document.body.appendChild(div)
+      //
+      // view project
+      //
+      add_menu(div,'view project',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         var win = window.open('https://gitlab.cba.mit.edu/pub/mods')
+         })
+      document.body.appendChild(div)
+      }
+   })
+//
+// prompt
+//
+document.body.appendChild(document.createTextNode(' '))
+var span = document.createElement('span')
+   span.setAttribute('id','logo')
+   span.style.display = 'inline-block'
+   span.style.verticalAlign = 'middle'
+   span.style.width = 20
+   span.style.height = 20
+   span.style.padding = mods.ui.padding
+   span.appendChild(logo(1))
+   document.body.appendChild(span)
+document.body.appendChild(document.createTextNode(' '))
+var span = document.createElement('span')
+   span.setAttribute('id','prompt')
+   span.style.display = 'inline-block'
+   span.style.verticalAlign = 'middle'
+   var innerspan = document.createElement('span')
+      span.appendChild(innerspan)
+   document.body.appendChild(span)
+function logo(size) {
+   var x = 0
+   var y = 2.8*size/3.8
+   var svgNS = "http://www.w3.org/2000/svg"
+   var logo = document.createElementNS(svgNS,"svg")
+   logo.setAttributeNS("http://www.w3.org/2000/xmlns/",
+      "xmlns:xlink","http://www.w3.org/1999/xlink")
+   logo.setAttributeNS(null,'viewBox',"0 0 "+size+" "+size)
+   var new_rect = document.createElementNS(svgNS,"rect");
+   new_rect.setAttribute("width",size/3.8)
+   new_rect.setAttribute("height",size/3.8)
+   new_rect.setAttribute("x",x)
+   new_rect.setAttribute("y",y)
+   new_rect.setAttribute("fill","blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS,"rect");
+   new_rect.setAttribute("width",size/3.8)
+   new_rect.setAttribute("height",size/3.8)
+   new_rect.setAttribute("x",x+1.4*size/3.8)
+   new_rect.setAttribute("y",y)
+   new_rect.setAttribute("fill","blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS,"rect");
+   new_rect.setAttribute("width",size/3.8)
+   new_rect.setAttribute("height",size/3.8)
+   new_rect.setAttribute("x",x+2.8*size/3.8)
+   new_rect.setAttribute("y",y)
+   new_rect.setAttribute("fill","blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS, "rect");
+   new_rect.setAttribute("width",size/3.8)
+   new_rect.setAttribute("height",size/3.8)
+   new_rect.setAttribute("x",x)
+   new_rect.setAttribute("y",y-1.4*size/3.8)
+   new_rect.setAttribute("fill","blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS, "rect");
+   new_rect.setAttribute("width", size / 3.8)
+   new_rect.setAttribute("height", size / 3.8)
+   new_rect.setAttribute("x", x + 2.8 * size / 3.8)
+   new_rect.setAttribute("y", y - 1.4 * size / 3.8)
+   new_rect.setAttribute("fill", "blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS, "rect");
+   new_rect.setAttribute("width", size / 3.8)
+   new_rect.setAttribute("height", size / 3.8)
+   new_rect.setAttribute("x", x + 1.4 * size / 3.8)
+   new_rect.setAttribute("y", y - 2.8 * size / 3.8)
+   new_rect.setAttribute("fill", "blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS, "rect");
+   new_rect.setAttribute("width", size / 3.8)
+   new_rect.setAttribute("height", size / 3.8)
+   new_rect.setAttribute("x", x + 2.8 * size / 3.8)
+   new_rect.setAttribute("y", y - 2.8 * size / 3.8)
+   new_rect.setAttribute("fill", "blue")
+   logo.appendChild(new_rect)
+   var new_circ = document.createElementNS(svgNS, "circle");
+   new_circ.setAttribute("r", size / (2 * 3.8))
+   new_circ.setAttribute("cx", x + size / (2 * 3.8))
+   new_circ.setAttribute("cy", y + size / (2 * 3.8) - 2.8 * size / 3.8)
+   new_circ.setAttribute("fill", "red")
+   logo.appendChild(new_circ)
+   var new_circ = document.createElementNS(svgNS, "circle");
+   new_circ.setAttribute("r", size / (2 * 3.8))
+   new_circ.setAttribute("cx", x + size / (2 * 3.8) + 1.4 * size / 3.8)
+   new_circ.setAttribute("cy", y + size / (2 * 3.8) - 1.4 * size / 3.8)
+   new_circ.setAttribute("fill", "red")
+   logo.appendChild(new_circ)
+   return logo
+   }
+set_prompt('right click/two finger/long press for menu; scroll for zoom, drag for pan')
+//
+// SVG canvas for drawing
+//
+var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg")
+   svg.style.position = 'absolute'
+   svg.style.backgroundColor = 'rgb(255,255,255)'
+   svg.style.top = mods.ui.header
+   svg.style.left = 0
+   svg.style.zIndex = 0
+   svg.style.overflow = 'visible'
+   svg.setAttribute('width',40)
+   svg.setAttribute('height',40)
+   svg.setAttribute('id','svg')
+   svg.setAttributeNS("http://www.w3.org/2000/xmlns/","xmlns:xlink","http://www.w3.org/1999/xlink")
+   document.body.appendChild(svg)
+//
+// link container
+//
+var svg = document.getElementById('svg')
+var g = document.createElementNS('http://www.w3.org/2000/svg','g')
+   g.setAttribute('id','links')
+   svg.appendChild(g)
+//
+// file reading controls
+//
+var file = document.createElement('input')
+   file.setAttribute('type','file')
+   file.setAttribute('id','mod_input')
+   file.style.position = 'absolute'
+   file.style.left = 0
+   file.style.top = 0
+   file.style.width = 0
+   file.style.height = 0
+   file.style.opacity = 0
+   file.addEventListener('change',function() {
+      mod_read_handler()
+      })
+   document.body.appendChild(file)
+var file = document.createElement('input')
+   file.setAttribute('type','file')
+   file.setAttribute('id','prog_input')
+   file.style.position = 'absolute'
+   file.style.left = 0
+   file.style.top = 0
+   file.style.width = 0
+   file.style.height = 0
+   file.style.opacity = 0
+   file.addEventListener('change',function() {
+      prog_read_handler()
+      })
+   document.body.appendChild(file)
+//
+// module container
+//
+var div = document.createElement('div')
+   div.setAttribute('id','modules')
+   document.body.appendChild(div)
+//
+// check for program load query
+//
+if (location.search.length > 0) {
+   var args = location.search.slice(1).split('&')
+   for (var a in args) {
+      var arg = args[a].split('=')
+      if (arg[0] == 'program')
+      prog_message_handler(arg[1])
+      }
+   }
+//
+// program routines
+//
+function prog_read_handler(event) {
+   var file = document.getElementById('prog_input')
+   var file_reader = new FileReader()
+   file_reader.onload = prog_load_handler
+   file_reader.readAsText(file.files[0])
+   mods.ui.progname = file.files[0].name
+   }
+function prog_message_handler(filename) {
+   var req = new XMLHttpRequest()
+   req.responseType = 'text'
+   req.onreadystatechange = function() {
+      if (req.readyState == XMLHttpRequest.DONE) {
+         prog = JSON.parse(req.response)
+         prog_load(prog)
+         }
+      }
+   var index = filename.lastIndexOf('/')
+   if (index != -1) {
+      mods.ui.progname = filename.slice(index+1)
+      }
+   else
+      mods.ui.progname = filename
+   //
+   // send request, with random query to prevent caching
+   //
+   req.open('GET',filename+'?rnd='+Math.random())
+   req.send()
+   }
+function prog_load_handler(event) {
+   prog = JSON.parse(event.target.result)
+   prog_load(prog)
+   }
+function prog_load(prog) {
+   //
+   // load modules
+   //
+   for (var idnumber in prog.modules) {
+      var module = prog.modules[idnumber]
+      var str = module.definition
+      try {
+         eval('var args = '+str)
+         }
+      catch (err) {
+         console.log(err.message)
+         return
+         }
+      args.definition = str
+      args.id = idnumber
+      var t = mods_transform()
+      var xw = t.ox-t.tx+(mods.ui.xstart-t.ox)/t.s
+      var yw = t.oy-t.ty+(mods.ui.ystart-t.oy)/t.s-mods.ui.header
+      args.top = parseFloat(module.top)+yw
+      args.left = parseFloat(module.left)+xw
+      args.filename = module.filename
+      add_module(args)
+      }
+   //
+   // load links
+   //
+   for (var linkid in prog.links) {
+      var str = prog.links[linkid]
+      eval('var link = '+str)
+      eval('var linksrc = '+link.source)
+      eval('var linkdst = '+link.dest)
+      var src = document.getElementById(
+         JSON.stringify({id:linksrc.id,type:linksrc.type,name:linksrc.name}))
+      var dst = document.getElementById(
+         JSON.stringify({id:linkdst.id,type:linkdst.type,name:linkdst.name}))
+      add_link(src,dst)
+      }
+   }
+function save_program() {
+   set_prompt('program name? ')
+   get_prompt(mods.ui.progname,function(filename){
+      mods.ui.progname = filename
+      var prog = {modules:{},links:[]}
+      var modules = document.getElementById('modules')
+      //
+      // save modules
+      //
+      for (var c = 0; c < modules.childNodes.length; ++c) {
+         var module = modules.childNodes[c]
+         var idnumber = module.id
+         prog.modules[idnumber] = {
+            definition:update_module_definition(
+               idnumber,module.dataset.definition),
+            top:module.dataset.top,
+            left:module.dataset.left,
+            filename: module.dataset.filename,
+            inputs:{},
+            outputs:{}
+            }
+         }
+      //
+      // save links
+      //
+      var svg = document.getElementById('svg')
+      var links = svg.getElementById('links')
+         for (var l = 0; l < links.childNodes.length; ++l) {
+            var link = links.childNodes[l]
+            var linkid = link.id
+            prog.links.push(linkid)
+            }
+      //
+      // download
+      //
+      var text = JSON.stringify(prog)
+      var a = document.createElement('a')
+      a.setAttribute('href','data:text/plain;charset=utf-8,'+
+         encodeURIComponent(text))
+      a.setAttribute('download',filename)
+      a.style.display = 'none'
+      document.body.appendChild(a)
+      a.click()
+      document.body.removeChild(a)
+      })
+   }
+function save_page() {
+   set_prompt('page name? ')
+   get_prompt(mods.ui.progname+".html",function(filename){
+      mods.ui.progname = filename
+      var prog = {modules:{},links:[]}
+      var modules = document.getElementById('modules')
+      //
+      // save modules
+      //
+      for (var c = 0; c < modules.childNodes.length; ++c) {
+         var module = modules.childNodes[c]
+         var idnumber = module.id
+         prog.modules[idnumber] = {
+            definition:update_module_definition(
+               idnumber,module.dataset.definition),
+            top:module.dataset.top,
+            left:module.dataset.left,
+	    filename: module.dataset.filename,
+            inputs:{},
+            outputs:{}
+            }
+         }
+      //
+      // save links
+      //
+      var svg = document.getElementById('svg')
+      var links = svg.getElementById('links')
+         for (var l = 0; l < links.childNodes.length; ++l) {
+            var link = links.childNodes[l]
+            var linkid = link.id
+            prog.links.push(linkid)
+            }
+      //
+      // read mods.js
+      //
+      var req = new XMLHttpRequest()
+      req.responseType = 'text'
+      req.onreadystatechange = function() {
+         if (req.readyState == XMLHttpRequest.DONE) {
+            //
+            // construct page
+            //
+            var str = req.response
+            var text ="<html>\n"
+            text += "<head><meta charset='utf-8'>\n"
+            text += "<title>mods</title>\n"
+            text += "</head>\n"
+            text += "<body link='black' alink='black' vlink='black'>\n"
+            text += "<"+"script"+">\n"
+            text += str
+            text += "var prog = JSON.parse(JSON.stringify("+JSON.stringify(prog)+"))\n"
+            text += "window.mods_prog_load(prog)\n"
+            text += "</"+"script"+">\n"
+            text += "</body>\n"
+            text += "</html>\n"
+            //
+            // download page
+            //
+            var a = document.createElement('a')
+            a.setAttribute('href','data:text/plain;charset=utf-8,'+
+               encodeURIComponent(text))
+            a.setAttribute('download',filename)
+            a.style.display = 'none'
+            document.body.appendChild(a)
+            a.click()
+            document.body.removeChild(a)
+            }
+         }
+      //
+      // send request, with random query to prevent caching
+      //
+      req.open('GET','js/mods.js'+'?rnd='+Math.random())
+      req.send()
+      })
+   }
+//
+// add program load to window
+//
+window.mods_prog_load = function(prog) {
+   prog_load(prog)
+   }
+//
+// module routines
+//
+function mod_read_handler(event) {
+   var file = document.getElementById('mod_input')
+   var file_reader = new FileReader()
+   file_reader.onload = mod_load_handler
+   file_reader.readAsText(file.files[0])
+   }
+function mod_message_handler(filename,top,left) {
+   var req = new XMLHttpRequest()
+   req.responseType = 'text'
+   req.onreadystatechange = function() {
+      if (req.readyState == XMLHttpRequest.DONE) {
+         var str = req.response
+         try {
+            eval('var args = '+str)
+            }
+         catch (err) {
+            console.log(err.message)
+            return
+            }
+         args.definition = str
+         args.id = String(Math.random())
+         args.top = top
+         args.left = left
+         args.filename = filename
+         add_module(args)
+         }
+      }
+   //
+   // send request, with random query to prevent caching
+   //
+   req.open('GET',filename+'?rnd='+Math.random())
+   req.send()
+   }
+function mod_load_handler(event) {
+   str = event.target.result
+   try {
+      eval('var args = '+str)
+      }
+   catch (err) {
+      console.log(err.message)
+      return
+      }
+   args.definition = str
+   args.id = String(Math.random())
+   args.top = mods.ui.top
+   args.left = mods.ui.left
+   args.filename = ""
+   var div = add_module(args)
+   return(div)
+   }
+function add_module(args) {
+   var idnumber = args.id
+   mods.mod[idnumber] = args.mod
+   var modules = document.getElementById('modules')
+   //
+   // container
+   //
+   var container = document.createElement('div')
+      container.setAttribute("id",idnumber)
+      container.style.position = "absolute"
+      container.style.top = args.top
+      container.style.left = args.left
+      container.dataset.top = args.top
+      container.dataset.left = args.left
+      container.dataset.filename = args.filename
+      container.dataset.name = args.name
+      container.style.zIndex = 0
+      container.style.width = window.innerWidth
+      container.dataset.definition = args.definition
+      modules.appendChild(container)
+   //
+   // name
+   //
+   var divname = document.createElement('div')
+      divname.appendChild(document.createTextNode(args.name))
+      divname.addEventListener('mouseover',name_over)
+      divname.addEventListener('mouseout',name_out)
+      divname.addEventListener('mousedown',name_mousedown)
+      divname.addEventListener('touchstart',name_touchdown)
+      divname.style.backgroundColor = "rgb(210,240,210)"
+      divname.style.padding = 1.5*mods.ui.padding
+      divname.style.position = "absolute"
+      divname.style.cursor = 'default'
+      divname.style.top = 0
+      divname.style.left = 0
+      divname.style.textAlign = 'center'
+      divname.style.border = '2px solid'
+      divname.style.borderRadius = '10px'
+      container.appendChild(divname)
+   //
+   // controls
+   //
+   var divctrl = document.createElement('div')
+      var editspan = document.createElement('span')
+         editspan.innerHTML = 'edit'
+         editspan.style.fontWeight = 'normal'
+         editspan.addEventListener('mouseover',function(event){
+            set_prompt('click to edit')
+            editspan.style.fontWeight = 'bold'})
+         editspan.addEventListener('mouseout',function(event){
+            set_prompt('')
+            editspan.style.fontWeight = 'normal'})
+         editspan.addEventListener('mousedown',edit_module)
+         divctrl.appendChild(editspan)
+      var delspan = document.createElement('span')
+         delspan.innerHTML = ' delete '
+         delspan.addEventListener('mouseover',function(event){
+            set_prompt('click to delete')
+            delspan.style.fontWeight = 'bold'})
+         delspan.addEventListener('mouseout',function(event){
+            set_prompt('')
+            delspan.style.fontWeight = 'normal'})
+         delspan.addEventListener('mousedown',function(event){
+            delete_module(event.target.parentNode.parentNode.id)})
+         divctrl.appendChild(delspan)
+      divctrl.style.backgroundColor = "rgb(240,220,220)"
+      divctrl.style.padding = mods.ui.padding
+      divctrl.style.position = "absolute"
+      divctrl.style.cursor = 'default'
+      divctrl.style.top = divname.clientHeight
+      divctrl.style.left = 0
+      divctrl.style.textAlign = 'center'
+      divctrl.style.border = '2px solid'
+      divctrl.style.borderRadius = '10px'
+      container.appendChild(divctrl)
+      divctrl.style.left = divname.clientWidth/2-divctrl.clientWidth/2
+   //
+   // interface
+   //
+   var divint = document.createElement('div')
+      divint.style.backgroundColor = "rgb(240,240,240)"
+      divint.style.padding = mods.ui.padding
+      divint.style.position = "absolute"
+      divint.style.top = divname.clientHeight+divctrl.clientHeight
+      divint.style.textAlign = 'center'
+      divint.style.border = '2px solid'
+      divint.style.borderRadius = '10px'
+      divint.setAttribute('id',JSON.stringify({id:idnumber,type:'interface'}))
+      divint.dataset.id = idnumber
+      divint.dataset.divNameSize = divname.clientWidth
+      args.interface(divint)
+      container.appendChild(divint)
+      divint.style.left = divname.clientWidth/2-divint.clientWidth/2
+   //
+   // inputs
+   //
+   var divin = document.createElement('div')
+      divin.setAttribute('id',JSON.stringify({id:idnumber,type:'inputs'}))
+      var b = document.createElement('b')
+         b.appendChild(document.createTextNode('inputs'))
+         divin.appendChild(b)
+      divin.style.backgroundColor = "rgb(240,240,210)"
+      divin.style.padding = mods.ui.padding
+      divin.style.paddingLeft = '2px'
+      divin.style.position= "absolute"
+      divin.style.top = divname.clientHeight+divctrl.clientHeight
+      divin.style.textAlign = 'left'
+      divin.style.border = '2px solid'
+      divin.style.borderRadius = '10px'
+      divin.setAttribute('id',JSON.stringify({id:idnumber,type:'inputs'}))
+      divin.style.cursor = 'default'
+      divin.addEventListener('mousedown',nothing)
+      divin.addEventListener('touchstart',nothing)
+      divin.addEventListener('mouseup',nothing)
+      divin.addEventListener('touchend',nothing)
+      for (var v in args.inputs) {
+         var div = document.createElement('div')
+         if (args.inputs[v].label != undefined)
+            div.innerHTML += args.inputs[v].label
+         else
+            div.innerHTML += v
+         if (args.inputs[v].type != '')
+            div.innerHTML += ' ('+args.inputs[v].type+')'
+         div.setAttribute('id',JSON.stringify({id:idnumber,type:'inputs',name:v}))
+         div.addEventListener('mouseover',input_over)
+         div.addEventListener('mouseout',input_out)
+         div.addEventListener('mousedown',input_mousedown)
+         div.addEventListener('touchstart',input_touchdown)
+         div.dataset.links = JSON.stringify([])
+         div.dataset.name = v
+         divin.appendChild(div)
+         div.dataset.id = JSON.stringify(
+            {id:idnumber,type:'input',name:v,
+            rnd:Math.random()}) // randomize for unique events
+         window.addEventListener(div.dataset.id,args.inputs[v].event)
+         }
+      container.appendChild(divin)
+      if ((Object.keys(args.inputs).length) == 0)
+         divin.style.visibility = 'hidden'
+      divin.style.left = divname.clientWidth/2
+         -divint.clientWidth/2-divin.clientWidth
+      for (var i = 1; i < divin.childNodes.length; ++i) {
+         divin.childNodes[i].dataset.dx = divin.offsetLeft
+            +divin.childNodes[i].offsetLeft
+         divin.childNodes[i].dataset.dy = divin.offsetTop
+            +divin.childNodes[i].offsetTop
+            +divin.childNodes[i].offsetHeight/2
+         }
+   //
+   // outputs
+   //
+   var divout = document.createElement('div')
+      divout.setAttribute('id',JSON.stringify({id:idnumber,type:'outputs'}))
+      var b = document.createElement('b')
+         b.appendChild(document.createTextNode('outputs'))
+      divout.appendChild(b)
+      divout.style.backgroundColor = "rgb(240,240,210)"
+      divout.style.padding = mods.ui.padding
+      divout.style.paddingRight = '2px'
+      divout.style.position = "absolute"
+      divout.style.top = divname.clientHeight+divctrl.clientHeight
+      divout.style.textAlign = 'right'
+      divout.addEventListener('mousedown',nothing)
+      divout.style.border = '2px solid'
+      divout.style.borderRadius = '10px'
+      divout.setAttribute('id',JSON.stringify({id:idnumber,type:'outputs'}))
+      divout.style.cursor = 'default'
+      divout.addEventListener('touchstart',nothing)
+      divout.addEventListener('mouseup',nothing)
+      divout.addEventListener('touchend',nothing)
+      for (var v in args.outputs) {
+         var div = document.createElement('div')
+         if (args.outputs[v].label != undefined)
+            div.innerHTML += args.outputs[v].label
+         else
+            div.innerHTML += v
+         if (args.outputs[v].type != '')
+            div.innerHTML += ' ('+args.outputs[v].type+')'
+         div.setAttribute('id',JSON.stringify({id:idnumber,type:'outputs',name:v}))
+         div.addEventListener('mouseover',output_over)
+         div.addEventListener('mouseout',output_out)
+         div.addEventListener('mousedown',output_mousedown)
+         div.addEventListener('touchstart',output_touchdown)
+         div.dataset.links = JSON.stringify([])
+         div.dataset.name = v
+         divout.appendChild(div)
+         div.dataset.id = JSON.stringify(
+            {id:idnumber,type:'output',name:v,
+            rnd:Math.random()}) // randomize for unique events
+         window.addEventListener(div.dataset.id,args.outputs[v].event)
+         }
+      container.appendChild(divout)
+      if ((Object.keys(args.outputs).length) == 0)
+         divout.style.visibility = 'hidden'
+      divout.style.left = divname.clientWidth/2
+         +divint.clientWidth/2
+      for (var i = 1; i < divout.childNodes.length; ++i) {
+         divout.childNodes[i].dataset.dx = divout.offsetLeft
+            +divout.childNodes[i].offsetLeft
+            +divout.childNodes[i].offsetWidth
+         divout.childNodes[i].dataset.dy = divout.offsetTop
+            +divout.childNodes[i].offsetTop
+            +divout.childNodes[i].offsetHeight/2
+         }
+      //
+      // initialization
+      //
+      args.init()
+      //
+      // resize to contents
+      //
+      container.style.width = divint.clientWidth+divin.clientWidth+divout.clientWidth
+      mods.fit(divint)
+      //
+      // return container
+      //
+      return(container)
+   }
+function delete_module(idnumber) {
+   //
+   // delete links
+   //
+   var ins = document.getElementById(
+      JSON.stringify({id:idnumber,type:'inputs'}))
+   var outs = document.getElementById(
+      JSON.stringify({id:idnumber,type:'outputs'}))
+   for (var i = 1; i < ins.childNodes.length; ++i) {
+      var links = JSON.parse(ins.childNodes[i].dataset.links)
+      for (var l in links)
+         delete_link(links[l])
+      }
+   for (var i = 1; i < outs.childNodes.length; ++i) {
+      var links = JSON.parse(outs.childNodes[i].dataset.links)
+      for (var l in links)
+         delete_link(links[l])
+      }
+   //
+   // delete container
+   //
+   var modules = document.getElementById('modules')
+   var container = document.getElementById(idnumber)
+   modules.removeChild(container)
+   //
+   // clear prompt
+   //
+   set_prompt('')
+   }
+function update_module_definition(id) {
+   //
+   // get definition
+   //
+   var module = document.getElementById(id)
+   var def = module.dataset.definition
+   //
+   // check for mod
+   //
+   if (mods.mod[id] == undefined)
+      return def
+   //
+   // split definition
+   //
+   var lines = def.split('\n')
+   //
+   // find init function
+   //
+   var line = 0
+   while (line < lines.length) {
+      if (lines[line].indexOf("var init") == 0)
+         break
+      line += 1
+      }
+   //
+   // read initializations up to inputs function
+   //
+   while (line < lines.length) {
+      if (lines[line].indexOf(".value =") != -1) {
+         var start = 4+lines[line].indexOf("mod.")
+         var end = lines[line].indexOf(".value")
+         var key = lines[line].slice(start,end)
+         var value = mods.mod[id][key]['value']
+         if (value.indexOf('\n') != -1)
+            value = value.replace(/\n/g,"\\n")
+         lines[line] = "   mod."+key+".value = '"+value+"'"
+         }
+      else if (lines[line].indexOf(".checked =") != -1) {
+         var start = 4+lines[line].indexOf("mod.")
+         var end = lines[line].indexOf(".checked")
+         var key = lines[line].slice(start,end)
+         var value = mods.mod[id][key]['checked']
+         lines[line] = "   mod."+key+".checked = "+value
+         }
+      if (lines[line].indexOf("var inputs") == 0)
+         break
+      line += 1
+      }
+   return(lines.join('\n'))
+   }
+function edit_module(evt) {
+   var mod = evt.target.parentNode.parentNode
+   var idnumber = mod.id
+   var def = update_module_definition(idnumber)
+   //
+   // open edit window
+   //
+   var top = mod.dataset.top
+   var left = mod.dataset.left
+   var name = mod.dataset.name
+   var filename = mod.dataset.filename
+   var fontsize = 100
+   var win = window.open('')
+   var file = document.createElement('input')
+      file.setAttribute('type','file')
+      file.setAttribute('id','edit_module_file')
+      file.style.position = 'absolute'
+      file.style.left = 0
+      file.style.top = 0
+      file.style.width = 0
+      file.style.height = 0
+      file.style.opacity = 0
+      file.addEventListener('change',function() {
+         edit_module_read_handler()
+         })
+      win.document.body.appendChild(file)
+   function edit_module_read_handler() {
+      var file = win.document.getElementById('edit_module_file')
+      var file_reader = new FileReader()
+      file_reader.onload = edit_module_load_handler
+      file_reader.readAsText(file.files[0])
+      }
+   function edit_module_load_handler(event) {
+      str = event.target.result
+      var text = win.document.getElementById('edit_module_text')
+      text.value = str
+      update_module(idnumber)
+      win.close()
+      }
+   if (filename != "undefined" && filename != "") {
+      var btn = document.createElement('button')
+         btn.appendChild(document.createTextNode('reload from server'))
+         btn.style.padding = mods.ui.padding
+         btn.style.margin = 1
+         btn.addEventListener('click',function(){
+            var req = new XMLHttpRequest()
+            req.responseType = 'text'
+            req.onreadystatechange = function() {
+               if (req.readyState == XMLHttpRequest.DONE) {
+                  text.value = req.response
+                  update_module(idnumber)
+                  }
+               }
+            req.open('GET',filename+'?rnd='+Math.random())
+            req.send()
+            win.close()
+            })
+         win.document.body.appendChild(btn)
+      }
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('load from file'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         var file = win.document.getElementById('edit_module_file')
+         file.value = null
+         file.click()
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('update and close'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         update_module(idnumber)
+         win.close()
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('update'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         update_module(idnumber)
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('close'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         win.close()
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('save'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         var a = document.createElement('a')
+         a.setAttribute('href','data:text/plain;charset=utf-8,'+
+            encodeURIComponent(text.value))
+         a.setAttribute('download',name)
+         a.style.display = 'none'
+         document.body.appendChild(a)
+         a.click()
+         document.body.removeChild(a)
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('increase font'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         fontsize *= 1.2
+         text.style.fontSize = fontsize+'%'
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('decrease font'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         fontsize /= 1.2
+         text.style.fontSize = fontsize+'%'
+         })
+      win.document.body.appendChild(btn)
+   win.document.body.appendChild(document.createElement('br'))
+   var text = document.createElement('textarea')
+      text.setAttribute('id','edit_module_text')
+      text.style.width = '100%'
+      text.style.height= '100%'
+      text.value = def
+      win.document.body.appendChild(text)
+   function reload_module(idnumber) {
+      }
+   function update_module(idnumber) {
+      //
+      // save links
+      //
+      var ins = document.getElementById(
+         JSON.stringify({id:idnumber,type:'inputs'}))
+      var inlinks = []
+      for (var i = 1; i < ins.childNodes.length; ++i) {
+         var links = JSON.parse(ins.childNodes[i].dataset.links)
+         for (var l in links)
+            inlinks.push(links[l])
+         }
+      var outs = document.getElementById(
+         JSON.stringify({id:idnumber,type:'outputs'}))
+      var outlinks = []
+      for (var i = 1; i < outs.childNodes.length; ++i) {
+         var links = JSON.parse(outs.childNodes[i].dataset.links)
+         for (var l in links)
+            outlinks.push(links[l])
+         }
+      //
+      // delete module
+      //
+      delete_module(idnumber)
+      //
+      // add module
+      //
+      var def = text.value
+      try {
+         eval('var args = '+def)
+         }
+      catch (err) {
+         console.log(err.message)
+         return
+         }
+      args.definition = def
+      args.id = idnumber
+      args.top = top
+      args.left = left
+      args.filename = filename
+      add_module(args)
+      //
+      // add links
+      //
+      for (var l in inlinks) {
+         eval('var link = '+inlinks[l])
+         eval('var linksrc = '+link.source)
+         eval('var linkdst = '+link.dest)
+         var src = document.getElementById(
+            JSON.stringify(
+               {id:linksrc.id,type:linksrc.type,name:linksrc.name}))
+         var dst = document.getElementById(
+            JSON.stringify(
+               {id:linkdst.id,type:linkdst.type,name:linkdst.name}))
+         add_link(src,dst)
+         }
+      for (var l in outlinks) {
+         eval('var link = '+outlinks[l])
+         eval('var linksrc = '+link.source)
+         eval('var linkdst = '+link.dest)
+         var src = document.getElementById(
+            JSON.stringify(
+               {id:linksrc.id,type:linksrc.type,name:linksrc.name}))
+         var dst = document.getElementById(
+            JSON.stringify(
+               {id:linkdst.id,type:linkdst.type,name:linkdst.name}))
+         add_link(src,dst)
+         }
+      }
+   }
+//
+// UI routines
+//
+function set_prompt(txt) {
+   var span = document.getElementById('prompt')
+   span.childNodes[0].innerHTML = ' '+txt
+   }
+function get_prompt(txt,fn) {
+   var div = document.getElementById('prompt')
+   if (div.childNodes.length > 2)
+      //
+      // already getting a prompt
+      //
+      return
+   var text = document.createElement('input')
+      text.type = 'text'
+      text.size = 20
+      text.value = txt
+      text.addEventListener('keydown',function(evt){
+         if (evt.key == 'Enter') {
+            var div = document.getElementById('prompt')
+            div.removeChild(div.childNodes[1])
+            div.removeChild(div.childNodes[1])
+            set_prompt('')
+            fn(text.value)
+            }
+         })
+      div.appendChild(text)
+      div.appendChild(document.createTextNode(' (enter)'))
+      text.focus()
+   }
+function nothing(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   }
+//
+// link routines
+//
+mods.add_link = function(src,dst) {
+   add_link(src,dst)
+   }
+function add_link(src,dst) {
+   //
+   // link order from out to in
+   //
+   if (src.id.indexOf('outputs') == -1) {
+      var tmp = src
+      src = dst
+      dst = tmp
+      }
+   //
+   // check if link exists
+   //
+   var id = JSON.stringify({source:src.id,dest:dst.id})
+   var link = document.getElementById(id)
+   if (link != null) {
+      //
+      // yes, remove it and return
+      //
+      delete_link(id)
+      return
+      }
+   //
+   // no, add link
+   //
+   var links = JSON.parse(src.dataset.links)
+      links.push(id)
+      src.dataset.links = JSON.stringify(links)
+   var links = JSON.parse(dst.dataset.links)
+      links.push(id)
+      dst.dataset.links = JSON.stringify(links)
+   //
+   // draw link
+   //
+   xsrc = src.parentNode.parentNode.offsetLeft
+      +parseFloat(src.dataset.dx)
+   ysrc = src.parentNode.parentNode.offsetTop
+      +parseFloat(src.dataset.dy)
+      -mods.ui.header
+   xdst = dst.parentNode.parentNode.offsetLeft
+      +parseFloat(dst.dataset.dx)
+   ydst = dst.parentNode.parentNode.offsetTop
+      +parseFloat(dst.dataset.dy)
+      -mods.ui.header
+   var links = document.getElementById('links')
+   var path = document.createElementNS('http://www.w3.org/2000/svg','path')
+      path.setAttribute('id',id)
+      path.setAttribute('d','M'+xsrc+','+ysrc+' C'+(xsrc+mods.ui.bezier)+','
+         +ysrc+' '+(xdst-mods.ui.bezier)+','+ydst+' '+xdst+','+ydst)
+      path.setAttribute('fill','none')
+      path.setAttribute('stroke','rgb(0,0,128)')
+      path.setAttribute('stroke-width',3)
+      links.appendChild(path)
+   /*
+   //
+   // don't trigger link
+   //
+   eval('var evtid = '+src.id)
+   evtid.type = 'output'
+   var evtstr = JSON.stringify(evtid)
+   var evt = new CustomEvent(evtstr)
+   window.dispatchEvent(evt)
+   */
+   }
+function delete_link(linkid) {
+   //
+   // delete a link
+   //
+   var links = document.getElementById('links')
+   links.removeChild(document.getElementById(linkid))
+   link = JSON.parse(linkid)
+   src = document.getElementById(link.source)
+   dst = document.getElementById(link.dest)
+   var links = JSON.parse(src.dataset.links)
+      var index = links.indexOf(linkid)
+      links.splice(index,1)
+      src.dataset.links = JSON.stringify(links)
+   var links = JSON.parse(dst.dataset.links)
+      var index = links.indexOf(linkid)
+      links.splice(index,1)
+      dst.dataset.links = JSON.stringify(links)
+   }
+function draw_links(idnumber,color) {
+   //
+   // draw a module's links
+   //
+   var ins = document.getElementById(
+      JSON.stringify({id:idnumber,type:'inputs'}))
+   var outs = document.getElementById(
+      JSON.stringify({id:idnumber,type:'outputs'}))
+   for (var i = 1; i < ins.childNodes.length; ++i) {
+      var links = JSON.parse(ins.childNodes[i].dataset.links)
+      for (var l in links)
+         draw_link(links[l],color)
+      }
+   for (var i = 1; i < outs.childNodes.length; ++i) {
+      var links = JSON.parse(outs.childNodes[i].dataset.links)
+      for (var l in links)
+         draw_link(links[l],color)
+      }
+   }
+function draw_link(id,color) {
+   //
+   // draw a link
+   //
+   var link = JSON.parse(id)
+   src = document.getElementById(link.source)
+   dst = document.getElementById(link.dest)
+   var path = document.getElementById(id)
+   xsrc = src.parentNode.parentNode.offsetLeft
+      +parseFloat(src.dataset.dx)
+   ysrc = src.parentNode.parentNode.offsetTop
+      +parseFloat(src.dataset.dy)
+      -mods.ui.header
+   xdst = dst.parentNode.parentNode.offsetLeft
+      +parseFloat(dst.dataset.dx)
+   ydst = dst.parentNode.parentNode.offsetTop
+      +parseFloat(dst.dataset.dy)
+      -mods.ui.header
+   path.setAttribute('d','M'+xsrc+','+ysrc+' C'+(xsrc+mods.ui.bezier)+','
+      +ysrc+' '+(xdst-mods.ui.bezier)+','+ydst+' '+xdst+','+ydst)
+   path.setAttribute('stroke',color)
+   }
+//
+// mods routines to be called from modules
+//
+mods.fit = function(div) {
+   //
+   // fit a module
+   //
+   div.style.left = div.dataset.divNameSize/2-div.clientWidth/2
+   var divin = document.getElementById(
+      JSON.stringify(
+         {id:div.dataset.id,type:'inputs'}))
+   divin.style.left = div.dataset.divNameSize/2-div.clientWidth/2-divin.clientWidth
+   var divout = document.getElementById(
+      JSON.stringify(
+         {id:div.dataset.id,type:'outputs'}))
+   divout.style.left = div.dataset.divNameSize/2+div.clientWidth/2
+   }
+mods.output = function(mod,varname,val) {
+   //
+   // send module outputs
+   //
+   var div = mod.div
+   var key = JSON.parse(div.id)
+   var idnumber = key.id
+   var out = document.getElementById(
+      JSON.stringify(
+         {id:idnumber,type:'outputs',name:varname}))
+   var links = JSON.parse(out.dataset.links)
+   for (var l in links) {
+      var link = JSON.parse(links[l])
+      var dest = JSON.parse(link.dest)
+      var divin = document.getElementById(JSON.stringify(
+         {id:dest.id,type:'inputs',name:dest.name}))
+      var evt = new CustomEvent(divin.dataset.id,{detail:val})
+      window.dispatchEvent(evt)
+      }
+   }
+//
+// module mod-ification calls
+//
+mods.module_create = function(args) {
+   var event = {target:{result:args}}
+   var div = mod_load_handler(event)
+   return(div)
+   }
+mods.module_delete = function(id) {
+   delete_module(id)
+   }
+mods.module_id = function(div) {
+   return div.parentNode.id
+   }
+mods.module_left = function(id) {
+   var module = document.getElementById(id)
+   return (parseInt(module.style.left))
+   }
+mods.module_move = function(id,dx,dy) {
+   var module = document.getElementById(id)
+   var top = parseInt(module.style.top)
+   module.style.top = top+dy
+   module.dataset.top = top+dy
+   var left = parseInt(module.style.left)
+   module.style.left = left+dx
+   module.dataset.left = left+dx
+   draw_links(id,mods.ui.link_color)
+   }
+mods.module_inputs = function(id,index) {
+   var module = document.getElementById(id)
+   var inputs = document.getElementById(
+      JSON.stringify({id:id,type:'inputs'}))
+   console.log(inputs.childNodes[index])
+   }
+mods.module_outputs = function(id,index) {
+   var module = document.getElementById(id)
+   var outputs = document.getElementById(
+      JSON.stringify({id:id,type:'outputs'}))
+   console.log(outputs.childNodes[index])
+   }
+mods.module_position = function(id,x,y) {
+   var module = document.getElementById(id)
+   var top = parseInt(module.style.top)
+   module.style.top = y
+   module.dataset.top = y
+   var left = parseInt(module.style.left)
+   module.style.left = x
+   module.dataset.left = x
+   draw_links(id,mods.ui.link_color)
+   }
+mods.module_top = function(id) {
+   var module = document.getElementById(id)
+   return (parseInt(module.style.top))
+   }
+mods.module_width = function(id) {
+   var module = document.getElementById(id)
+   return (parseInt(module.clientWidth))
+   }
+//
+// input event handlers
+//
+function input_over(evt) {
+   evt.target.style.fontWeight = 'bold'
+   var links = JSON.parse(evt.target.dataset.links)
+   for (var l in links)
+      draw_link(links[l],mods.ui.link_highlight)
+   if (mods.ui.source == null)
+      set_prompt('click to link')
+   }
+function input_out(evt) {
+   evt.target.style.fontWeight = 'normal'
+   var links = JSON.parse(evt.target.dataset.links)
+   for (var l in links)
+      draw_link(links[l],mods.ui.link_color)
+   if (mods.ui.source == null)
+      set_prompt('')
+   }
+function input_mousedown(evt) {
+   if (mods.ui.source == null) {
+      mods.ui.source = evt.target
+      set_prompt('variable to link/unlink to?')
+      }
+   else {
+      add_link(mods.ui.source,evt.target)
+      set_prompt('')
+      mods.ui.source = null
+      }
+   }
+function input_touchdown(evt) {
+   if (mods.ui.source == null) {
+      mods.ui.source = evt.target
+      set_prompt('variable to link/unlink to?')
+      }
+   else {
+      add_link(mods.ui.source,evt.target)
+      set_prompt('')
+      mods.ui.source = null
+      }
+   }
+//
+// output event handlers
+//
+function output_over(evt) {
+   evt.target.style.fontWeight = 'bold'
+   var links = JSON.parse(evt.target.dataset.links)
+   for (var l in links)
+      draw_link(links[l],mods.ui.link_highlight)
+   if (mods.ui.source == null)
+      set_prompt('click to link')
+   }
+function output_out(evt) {
+   evt.target.style.fontWeight = 'normal'
+   var links = JSON.parse(evt.target.dataset.links)
+   for (var l in links)
+      draw_link(links[l],mods.ui.link_color)
+   if (mods.ui.source == null)
+      set_prompt('')
+   }
+function output_mousedown(evt) {
+   if (mods.ui.source == null) {
+      mods.ui.source = evt.target
+      set_prompt('variable to link/unlink to?')
+      }
+   else {
+      add_link(mods.ui.source,evt.target)
+      set_prompt('')
+      mods.ui.source = null
+      }
+   }
+function output_touchdown(evt) {
+   if (mods.ui.source == null) {
+      mods.ui.source = evt.target
+      set_prompt('variable to link/unlink to?')
+      }
+   else {
+      add_link(mods.ui.source,evt.target)
+      set_prompt('')
+      mods.ui.source = null
+      }
+   }
+//
+// name event handlers
+//
+function name_over(evt) {
+   evt.target.style.fontWeight = 'bold'
+   if (mods.ui.source == null)
+      set_prompt('click and drag to move')
+   }
+function name_out(evt) {
+   evt.target.style.fontWeight = 'normal'
+   if (mods.ui.source == null)
+      set_prompt('')
+   }
+function name_mousedown(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var div = document.getElementById(evt.target.parentNode.id)
+      div.style.zIndex = 1
+      mods.ui.xstart = evt.clientX
+      mods.ui.ystart = evt.clientY
+      mods.ui.selected[evt.target.parentNode.id] = true
+      window.addEventListener('mousemove',name_mousemove)
+      window.addEventListener('mouseup',name_mouseup)
+   }
+function name_mousemove(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var t = mods_transform()
+   for (var id in mods.ui.selected) {
+      var div = document.getElementById(id)
+         var dx = (evt.clientX-mods.ui.xstart)/t.s
+         var dy = (evt.clientY-mods.ui.ystart)/t.s
+         var newleft = parseFloat(div.dataset.left)+dx
+         var newtop = parseFloat(div.dataset.top)+dy
+         div.style.left = newleft+'px'
+         div.style.top = newtop+'px'
+      draw_links(id,mods.ui.link_color)
+      }
+   }
+function name_mouseup(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var t = mods_transform()
+   for (var id in mods.ui.selected) {
+      var div = document.getElementById(id)
+         div.style.zIndex = 0
+         div.childNodes[0].style.fontWeight = 'normal'
+         var dx = (evt.clientX-mods.ui.xstart)/t.s
+         var dy = (evt.clientY-mods.ui.ystart)/t.s
+         div.dataset.left = parseFloat(div.dataset.left)+dx
+         div.dataset.top = parseFloat(div.dataset.top)+dy
+         window.removeEventListener('mousemove',name_mousemove)
+         window.removeEventListener('mouseup',name_mouseup)
+      }
+   mods.ui.selected = {}
+   }
+function name_touchdown(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var div = document.getElementById(evt.target.parentNode.id)
+      div.style.zIndex = 1
+      mods.ui.xstart = evt.changedTouches[0].pageX
+      mods.ui.ystart = evt.changedTouches[0].pageY
+      mods.ui.selected[evt.target.parentNode.id] = true
+      window.addEventListener('touchmove',name_touchmove)
+      window.addEventListener('touchend',name_touchup)
+   }
+function name_touchmove(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var t = mods_transform()
+   for (var id in mods.ui.selected) {
+      var div = document.getElementById(id)
+         var dx = (evt.changedTouches[0].pageX-mods.ui.xstart)/t.s
+         var dy = (evt.changedTouches[0].pageY-mods.ui.ystart)/t.s
+         var newleft = parseFloat(div.dataset.left)+dx
+         var newtop = parseFloat(div.dataset.top)+dy
+         div.style.left = newleft+'px'
+         div.style.top = newtop+'px'
+      draw_links(id,mods.ui.link_color)
+      }
+   }
+function name_touchup(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var t = mods_transform()
+   for (var id in mods.ui.selected) {
+      var div = document.getElementById(id)
+         div.style.zIndex = 0
+         var dx = (evt.changedTouches[0].pageX-mods.ui.xstart)/t.s
+         var dy = (evt.changedTouches[0].pageY-mods.ui.ystart)/t.s
+         div.dataset.left = parseFloat(div.dataset.left)+dx
+         div.dataset.top = parseFloat(div.dataset.top)+dy
+         window.removeEventListener('touchmove',name_touchmove)
+         window.removeEventListener('touchend',name_touchup)
+      }
+   mods.ui.selected = {}
+   }
+})()
+var prog = JSON.parse(JSON.stringify({"modules":{"0.47383876715576023":{"definition":"//\n// distance transform \n//    assumes thresholded image, with zero intensity exterior\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'distance transform'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         distance_transform()}}}\n//\n// outputs\n//\nvar outputs = {\n   distances:{type:'F32',\n      event:function(){\n         mod.distances.height = mod.input.height\n         mod.distances.width = mod.input.width\n         mods.output(mod,'distances',mod.distances)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   div.appendChild(document.createElement('br'))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// distance transform function\n//\nfunction distance_transform() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      mod.distances = new Float32Array(evt.data.buffer)\n      var imgbuf = new Uint8ClampedArray(h*w*4)\n      var dmax = -Number.MAX_VALUE\n      for (var y = 0; y < h; ++y) {\n         for (var x = 0; x < w; ++x) {\n            if (mod.distances[(h-1-y)*w+x] > dmax)\n               dmax = mod.distances[(h-1-y)*w+x]\n            }\n         }\n      var i\n      for (var y = 0; y < h; ++y) {\n         for (var x = 0; x < w; ++x) {\n            i = 255*mod.distances[(h-1-y)*w+x]/dmax\n            imgbuf[(h-1-y)*w*4+x*4+0] = i\n            imgbuf[(h-1-y)*w*4+x*4+1] = i\n            imgbuf[(h-1-y)*w*4+x*4+2] = i\n            imgbuf[(h-1-y)*w*4+x*4+3] = 255\n            }\n         }\n      var imgdata = new ImageData(imgbuf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.distances.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var ctx = mod.img.getContext(\"2d\")\n   ctx.putImageData(mod.input,0,0)\n   var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,\n      buffer:img.data.buffer},\n      [img.data.buffer])\n   }\n//\n// distance transform worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var ny = evt.data.height\n      var nx = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Float32Array(nx*ny)\n      function distance(g,x,y,i) {\n         return ((y-i)*(y-i)+g[i][x]*g[i][x])\n         }\n      function intersection(g,x,y0,y1) {\n         return ((g[y0][x]*g[y0][x]-g[y1][x]*g[y1][x]+y0*y0-y1*y1)/(2.0*(y0-y1)))\n         }\n      //\n      // allocate arrays\n      //\n      var g = []\n      for (var y = 0; y < ny; ++y)\n         g[y] = new Uint32Array(nx)\n      var h = []\n      for (var y = 0; y < ny; ++y)\n         h[y] = new Uint32Array(nx)\n      var distances = []\n      for (var y = 0; y < ny; ++y)\n         distances[y] = new Uint32Array(nx)\n      var starts = new Uint32Array(ny)\n      var minimums = new Uint32Array(ny)\n      var d\n      //\n      // column scan\n      //  \n      for (var y = 0; y < ny; ++y) {\n         //\n         // right pass\n         //\n         var closest = -nx\n         for (var x = 0; x < nx; ++x) {\n            if (input[(ny-1-y)*nx*4+x*4+0] != 0) {\n               g[y][x] = 0\n               closest = x\n               }\n            else\n               g[y][x] = (x-closest)\n            }\n         //\n         // left pass\n         //\n         closest = 2*nx\n         for (var x = (nx-1); x >= 0; --x) {\n            if (input[(ny-1-y)*nx*4+x*4+0] != 0)\n               closest = x\n            else {\n               d = (closest-x)\n               if (d < g[y][x])\n                  g[y][x] = d\n               }\n            }\n         }\n      //\n      // row scan\n      //\n      for (var x = 0; x < nx; ++x) {\n         var segment = 0\n         starts[0] = 0\n         minimums[0] = 0\n         //\n         // down \n         //\n         for (var y = 1; y < ny; ++y) {\n            while ((segment >= 0) &&\n               (distance(g,x,starts[segment],minimums[segment]) > distance(g,x,starts[segment],y)))\n               segment -= 1\n            if (segment < 0) {\n               segment = 0\n               minimums[0] = y\n               }\n            else {\n               newstart = 1+intersection(g,x,minimums[segment],y)\n               if (newstart < ny) {\n                  segment += 1\n                  minimums[segment] = y\n                  starts[segment] = newstart\n                  }\n               }\n            }\n         //\n         // up \n         //\n         for (var y = (ny-1); y >= 0; --y) {\n            d = Math.sqrt(distance(g,x,y,minimums[segment]))\n            output[(ny-1-y)*nx+x] = d\n            if (y == starts[segment])\n               segment -= 1\n            }\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1287.611647642926","left":"4490.813999470311","filename":"undefined","inputs":{},"outputs":{}},"0.07944144280928633":{"definition":"//\n// edge detect\n//    green = interior, blue = exterior, red = boundary\n//    assumes input is thresholded\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'edge detect'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         edge_detect()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('green:interior, blue:exterior, red:boundary'))\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// edge detect\n//\nfunction edge_detect() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   webworker.postMessage({worker:worker.toString(),\n      height:mod.input.height,width:mod.input.width,\n      buffer:mod.input.data.buffer},\n      [mod.input.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Uint8ClampedArray(h*w*4)\n      var i00,i0m,i0p,im0,ip0,imm,imp,ipm,ipp,row,col\n      //\n      // find edges - interior\n      //\n      for (row = 1; row < (h-1); ++row) {\n         for (col = 1; col < (w-1); ++col) {\n            i00 = (input[(h-1-row)*w*4+col*4+0] \n                      +input[(h-1-row)*w*4+col*4+1] \n                      +input[(h-1-row)*w*4+col*4+2])\n            i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                      +input[(h-1-row)*w*4+(col+1)*4+1] \n                      +input[(h-1-row)*w*4+(col+1)*4+2])\n            ip0 = (input[(h-2-row)*w*4+col*4+0] \n                      +input[(h-2-row)*w*4+col*4+1] \n                      +input[(h-2-row)*w*4+col*4+2])\n            ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                      +input[(h-2-row)*w*4+(col+1)*4+1] \n                      +input[(h-2-row)*w*4+(col+1)*4+2])\n            i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                      +input[(h-1-row)*w*4+(col-1)*4+1] \n                      +input[(h-1-row)*w*4+(col-1)*4+2])\n            im0 = (input[(h-row)*w*4+col*4+0] \n                      +input[(h-row)*w*4+col*4+1] \n                      +input[(h-row)*w*4+col*4+2])\n            imm = (input[(h-row)*w*4+(col-1)*4+0] \n                      +input[(h-row)*w*4+(col-1)*4+1] \n                      +input[(h-row)*w*4+(col-1)*4+2])\n            imp = (input[(h-row)*w*4+(col+1)*4+0] \n                      +input[(h-row)*w*4+(col+1)*4+1] \n                      +input[(h-row)*w*4+(col+1)*4+2])\n            ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                      +input[(h-2-row)*w*4+(col-1)*4+1] \n                      +input[(h-2-row)*w*4+(col-1)*4+2])\n            if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp) \n               || (i00 != i0m) || (i00 != im0) || (i00 != imm)\n               || (i00 != imp) || (i00 != ipm)) {\n               output[(h-1-row)*w*4+col*4+0] = 255\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else if (i00 == 0) {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 255\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 255\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      //\n      // left and right edges\n      //\n      for (row = 1; row < (h-1); ++row) {\n         col = w-1\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         imm = (input[(h-row)*w*4+(col-1)*4+0] \n                   +input[(h-row)*w*4+(col-1)*4+1] \n                   +input[(h-row)*w*4+(col-1)*4+2])\n         ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                   +input[(h-2-row)*w*4+(col-1)*4+1] \n                   +input[(h-2-row)*w*4+(col-1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n        if ((i00 != i0m) || (i00 != ip0) || (i00 != ipm) \n           || (i00 != im0) || (i00 != imm)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         col = 0\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         imp = (input[(h-row)*w*4+(col+1)*4+0] \n                   +input[(h-row)*w*4+(col+1)*4+1] \n                   +input[(h-row)*w*4+(col+1)*4+2])\n         ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                   +input[(h-2-row)*w*4+(col+1)*4+1] \n                   +input[(h-2-row)*w*4+(col+1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n        if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp) \n           || (i00 != im0) || (i00 != imp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         }\n      //\n      // top and bottom edges\n      //\n      for (col = 1; col < (w-1); ++col) {\n         row = h-1\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         imm = (input[(h-row)*w*4+(col-1)*4+0] \n                   +input[(h-row)*w*4+(col-1)*4+1] \n                   +input[(h-row)*w*4+(col-1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         imp = (input[(h-row)*w*4+(col+1)*4+0] \n                   +input[(h-row)*w*4+(col+1)*4+1] \n                   +input[(h-row)*w*4+(col+1)*4+2])\n        if ((i00 != i0m) || (i00 != i0p) || (i00 != imm) \n           || (i00 != im0) || (i00 != imp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         row = 0\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                   +input[(h-2-row)*w*4+(col-1)*4+1] \n                   +input[(h-2-row)*w*4+(col-1)*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n         ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                   +input[(h-2-row)*w*4+(col+1)*4+1] \n                   +input[(h-2-row)*w*4+(col+1)*4+2])\n        if ((i00 != i0m) || (i00 != i0p) || (i00 != ipm) \n           || (i00 != ip0) || (i00 != ipp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         }\n      //\n      // corners\n      //\n      row = 0\n      col = 0\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                +input[(h-1-row)*w*4+(col+1)*4+1] \n                +input[(h-1-row)*w*4+(col+1)*4+2])\n      ip0 = (input[(h-2-row)*w*4+col*4+0] \n                +input[(h-2-row)*w*4+col*4+1] \n                +input[(h-2-row)*w*4+col*4+2])\n      ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                +input[(h-2-row)*w*4+(col+1)*4+1] \n                +input[(h-2-row)*w*4+(col+1)*4+2])\n      if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = 0\n      col = w-1\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                +input[(h-1-row)*w*4+(col-1)*4+1] \n                +input[(h-1-row)*w*4+(col-1)*4+2])\n      ip0 = (input[(h-2-row)*w*4+col*4+0] \n                +input[(h-2-row)*w*4+col*4+1] \n                +input[(h-2-row)*w*4+col*4+2])\n      ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                +input[(h-2-row)*w*4+(col-1)*4+1] \n                +input[(h-2-row)*w*4+(col-1)*4+2])\n      if ((i00 != i0m) || (i00 != ip0) || (i00 != ipm)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = h-1\n      col = 0\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                +input[(h-1-row)*w*4+(col+1)*4+1] \n                +input[(h-1-row)*w*4+(col+1)*4+2])\n      im0 = (input[(h-row)*w*4+col*4+0] \n                +input[(h-row)*w*4+col*4+1] \n                +input[(h-row)*w*4+col*4+2])\n      imp = (input[(h-row)*w*4+(col+1)*4+0] \n                +input[(h-row)*w*4+(col+1)*4+1] \n                +input[(h-row)*w*4+(col+1)*4+2])\n      if ((i00 != i0p) || (i00 != im0) || (i00 != imp)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = h-1\n      col = w-1\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                +input[(h-1-row)*w*4+(col-1)*4+1] \n                +input[(h-1-row)*w*4+(col-1)*4+2])\n      im0 = (input[(h-row)*w*4+col*4+0] \n                +input[(h-row)*w*4+col*4+1] \n                +input[(h-row)*w*4+col*4+2])\n      imm = (input[(h-row)*w*4+(col-1)*4+0] \n                +input[(h-row)*w*4+(col-1)*4+1] \n                +input[(h-row)*w*4+(col-1)*4+2])\n      if ((i00 != i0m) || (i00 != im0) || (i00 != imm)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1904.6116476429258","left":"4948.813999470311","filename":"undefined","inputs":{},"outputs":{}},"0.8903773266711255":{"definition":"//\n// orient edges\n//    input is green:interior, blue:exterior, red:boundary\n//    output is red 128:north,64:south, green 128:east,64:west, blue 128:start,64:stop\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'orient edges'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         var ctx = mod.display.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         orient_edges()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // off-screen display canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.display = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('red:north, dark red:south'))\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('green:east, dark green:west'))\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('blue:start, dark blue:stop'))\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.display,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// orient edges\n//\nfunction orient_edges() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      var disp = new Uint8ClampedArray(evt.data.display)\n      var dispdata = new ImageData(disp,w,h)\n      var ctx = mod.display.getContext(\"2d\")\n      ctx.putImageData(dispdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var w = mod.canvas.width\n      var h = mod.canvas.height\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,w,h)\n      ctx.drawImage(mod.display,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,\n      buffer:mod.input.data.buffer},\n      [mod.input.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Uint8ClampedArray(h*w*4)\n      var row,col\n      var boundary = 0\n      var interior = 1\n      var exterior = 2\n      var alpha = 3\n      var northsouth = 0\n      var north = 128\n      var south = 64\n      var eastwest = 1\n      var east = 128\n      var west = 64\n      var startstop = 2\n      var start = 128\n      var stop = 64\n      //\n      // orient body states\n      //\n      for (row = 1; row < (h-1); ++row) {\n         for (col = 1; col < (w-1); ++col) {\n            output[(h-1-row)*w*4+col*4+northsouth] = 0\n            output[(h-1-row)*w*4+col*4+eastwest] = 0\n            output[(h-1-row)*w*4+col*4+startstop] = 0\n            output[(h-1-row)*w*4+col*4+alpha] = 255\n            if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n               if ((input[(h-1-(row+1))*w*4+(col)*4+boundary] != 0)\n                  && ((input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)\n                  || (input[(h-1-(row+1))*w*4+(col+1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+northsouth] |= north\n               if ((input[(h-1-(row-1))*w*4+(col)*4+boundary] != 0)\n                  && ((input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)\n                  || (input[(h-1-(row-1))*w*4+(col-1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+northsouth] |= south\n               if ((input[(h-1-(row))*w*4+(col+1)*4+boundary] != 0)\n                  && ((input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)\n                  || (input[(h-1-(row-1))*w*4+(col+1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+eastwest] |= east\n               if ((input[(h-1-(row))*w*4+(col-1)*4+boundary] != 0)\n                  && ((input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)\n                  || (input[(h-1-(row+1))*w*4+(col-1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+eastwest] |= west\n               }\n            }\n         }\n      //\n      // orient edge states\n      //\n      for (col = 1; col < (w-1); ++col) {\n         row = 0\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if ((input[(h-1-(row+1))*w*4+(col)*4+boundary] != 0)\n               && (input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+northsouth] |= north\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            if (input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            }\n         row = h-1\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if (input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            if ((input[(h-1-(row-1))*w*4+(col)*4+boundary] != 0)\n               && (input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+northsouth] |= south\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            }\n         }\n      for (row = 1; row < (h-1); ++row) {\n         col = 0\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if ((input[(h-1-(row))*w*4+(col+1)*4+boundary] != 0)\n               && (input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+eastwest] |= east\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            if (input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            }\n         col = w-1\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if (input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            if ((input[(h-1-(row))*w*4+(col-1)*4+boundary] != 0)\n               && (input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+eastwest] |= west\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            }\n         }\n      //\n      // orient corner states (todo)\n      //\n      row = 0\n      col = 0\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = h-1\n      col = 0\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = 0\n      col = w-1\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = h-1\n      col = w-1\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      //\n      // invert background for display\n      //\n      var display = new Uint8ClampedArray(h*w*4)\n      var r,g,b,i\n      for (row = 0; row < h; ++row) {\n         for (col = 0; col < w; ++col) {\n            r = output[(h-1-row)*w*4+col*4+0]\n            g = output[(h-1-row)*w*4+col*4+1]\n            b = output[(h-1-row)*w*4+col*4+2]\n            i = r+g+b\n            if (i != 0) {            \n               display[(h-1-row)*w*4+col*4+0] = output[(h-1-row)*w*4+col*4+0]\n               display[(h-1-row)*w*4+col*4+1] = output[(h-1-row)*w*4+col*4+1]\n               display[(h-1-row)*w*4+col*4+2] = output[(h-1-row)*w*4+col*4+2]\n               display[(h-1-row)*w*4+col*4+3] = output[(h-1-row)*w*4+col*4+3]\n               }\n            else {\n               display[(h-1-row)*w*4+col*4+0] = 255\n               display[(h-1-row)*w*4+col*4+1] = 255\n               display[(h-1-row)*w*4+col*4+2] = 255\n               display[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      //\n      // return output\n      //\n      self.postMessage({buffer:output.buffer,display:display.buffer},[output.buffer,display.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1774.611647642926","left":"4517.813999470311","filename":"undefined","inputs":{},"outputs":{}},"0.3135579179893032":{"definition":"//\n// distance transform \n//    assumes thresholded image, with zero intensity exterior\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'offset'\n//\n// initialization\n//\nvar init = function() {\n   mod.offset.value = ''\n   }\n//\n// inputs\n//\nvar inputs = {\n   distances:{type:'F32',\n      event:function(evt){\n         mod.distances = evt.detail\n         var h = mod.distances.height\n         var w = mod.distances.width\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.height = mod.distances.height \n         ctx.canvas.width = mod.distances.width\n         if (mod.offset.value != '')\n            offset()\n         }},\n   offset:{type:'number',\n      event:function(evt){\n         mod.offset.value = evt.detail\n         offset()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // offset value\n   //\n   div.appendChild(document.createTextNode('offset (pixels): '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         offset()\n         })\n      div.appendChild(input)\n      mod.offset = input\n   //\n   // view button\n   //\n   div.appendChild(document.createElement('br'))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// offset\n//\nfunction offset() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.distances.height\n      var w = mod.distances.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var offset = parseFloat(mod.offset.value)\n   webworker.postMessage({\n      height:mod.distances.height,width:mod.distances.width,\n      offset:offset,buffer:mod.distances.buffer})\n   }\n//\n// offset worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var offset = evt.data.offset\n      var input = new Float32Array(evt.data.buffer)\n      var output = new Uint8ClampedArray(4*h*w)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            if (input[(h-1-row)*w+col] <= offset) {\n               output[(h-1-row)*w*4+col*4+0] = 255\n               output[(h-1-row)*w*4+col*4+1] = 255\n               output[(h-1-row)*w*4+col*4+2] = 255\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1387.611647642926","left":"4949.813999470311","filename":"undefined","inputs":{},"outputs":{}},"0.08127540142793499":{"definition":"//\n// read png\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'read png'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   }\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}},\n   imageInfo:{type:'object',\n      event:function(){\n         var obj = {}\n         obj.name = mod.name.nodeValue\n         obj.dpi = parseFloat(mod.dpitext.value)\n         obj.width = mod.img.width\n         obj.height = mod.img.height\n         mods.output(mod,'imageInfo',obj)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // file input control\n   //\n   var file = document.createElement('input')\n      file.setAttribute('type','file')\n      file.setAttribute('id',div.id+'file_input')\n      file.style.position = 'absolute'\n      file.style.left = 0\n      file.style.top = 0\n      file.style.width = 0\n      file.style.height = 0\n      file.style.opacity = 0\n      file.addEventListener('change',function() {\n         png_read_handler()\n         })\n      div.appendChild(file)\n      mod.file = file\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // file select button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('select png file'))\n      btn.addEventListener('click',function(){\n         var file = document.getElementById(div.id+'file_input')\n         file.value = null\n         file.click()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createTextNode(' '))\n   //\n   // invert button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('invert'))\n      btn.addEventListener('click',function(){\n         invert_image()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // info div\n   //\n   var info = document.createElement('div')\n      info.setAttribute('id',div.id+'info')\n      info.appendChild(document.createTextNode('dpi: '))\n      var input = document.createElement('input')\n         input.type = 'text'\n         input.size = 6\n         input.addEventListener('input',function(){\n            mod.dpi = parseFloat(mod.dpitext.value)\n            mod.mmtext.nodeValue = (25.4*mod.img.width/mod.dpi).toFixed(3)\n               +' x '+(25.4*mod.img.height/mod.dpi).toFixed(3)+' mm'\n            mod.intext.nodeValue = (mod.img.width/mod.dpi).toFixed(3)\n               +' x '+(mod.img.height/mod.dpi).toFixed(3)+' in'\n            outputs.imageInfo.event()\n            })\n         info.appendChild(input)\n         mod.dpitext = input\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('px: ')\n         info.appendChild(text)\n         mod.pxtext = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('mm: ')\n         info.appendChild(text)\n         mod.mmtext = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('in: ')\n         info.appendChild(text)\n         mod.intext = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('')\n         info.appendChild(text)\n         mod.name = text\n      div.appendChild(info)\n   }\n//\n// local functions\n//\n// read handler\n//\nfunction png_read_handler(event) {\n   var file_reader = new FileReader()\n   file_reader.onload = png_binary_handler\n   input_file = mod.file.files[0]\n   file_name = input_file.name\n   mod.name.nodeValue = file_name\n   file_reader.readAsArrayBuffer(input_file)\n   }\n//\n// binary load handler\n//\nfunction png_binary_handler(event) {\n   //\n   // get DPI\n   //\n   // 8 header\n   // 4 len, 4 type, data, 4 crc\n   // pHYs 4 ppx, 4 ppy, 1 unit: 0 ?, 1 meter\n   // IEND\n   //\n   var units = ppx = ppy = 0\n   var buf = event.target.result\n   var view = new DataView(buf)\n   var ptr = 8\n   if (!((view.getUint8(1) == 80) && (view.getUint8(2) == 78) && (view.getUint8(3) == 71))) {\n      set_prompt(\"error: PNG header not found\")\n      return\n      }\n   while (1) {\n      var length = view.getUint32(ptr)\n      ptr += 4\n      var type = String.fromCharCode(\n         view.getUint8(ptr),view.getUint8(ptr+1),\n         view.getUint8(ptr+2),view.getUint8(ptr+3))\n      ptr += 4\n      if (type == \"pHYs\") {\n         ppx = view.getUint32(ptr)\n         ppy = view.getUint32(ptr + 4)\n         units = view.getUint8(ptr + 8)\n         }\n      if (type == \"IEND\")\n         break\n      ptr += length + 4\n      }\n   if (units == 0) {\n      set_prompt(\"no PNG units not found, assuming 72 DPI\")\n      ppx = 72*1000/25.4\n      }\n   dpi = ppx*25.4/1000\n   //\n   // read as URL for display\n   //\n   var file_reader = new FileReader()\n   file_reader.onload = png_URL_handler\n   file_reader.readAsDataURL(input_file)\n   }\n//\n// URL load handler\n//\nfunction png_URL_handler(event) {\n   var img = new Image()\n   img.setAttribute(\"src\",event.target.result)\n   img.onload = function() {\n      if (img.width > img.height) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-img.height/img.width)\n         var w = mod.canvas.width\n         var h = mod.canvas.width*img.height/img.width\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-img.width/img.height)\n         var y0 = 0\n         var w = mod.canvas.height*img.width/img.height\n         var h = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n         ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n         ctx.drawImage(img,x0,y0,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = img.width\n         ctx.canvas.height = img.height \n         ctx.drawImage(img,0,0)\n      mod.dpitext.value = dpi.toFixed(3)\n      mod.pxtext.nodeValue = img.width+' x '+img.height+' px'\n      mod.mmtext.nodeValue = (25.4*img.width/dpi).toFixed(3)\n         +' x '+(25.4*img.height/dpi).toFixed(3)+' mm'\n      mod.intext.nodeValue = (img.width/dpi).toFixed(3)\n         +' x '+(img.height/dpi).toFixed(3)+' in'\n      outputs.image.event()\n      outputs.imageInfo.event()\n      }\n   }\n//\n// invert image\n//\nfunction invert_image() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var h = mod.img.height\n   var w = mod.img.width\n   var ctx = mod.img.getContext(\"2d\")\n   var img = ctx.getImageData(0,0,w,h)\n   webworker.postMessage({\n      height:img.height,width:img.width,buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            buf[(h-1-row)*w*4+col*4+0] \n               = 255-buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+1] \n               = 255-buf[(h-1-row)*w*4+col*4+1] \n            buf[(h-1-row)*w*4+col*4+2] \n               = 255-buf[(h-1-row)*w*4+col*4+2] \n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1229.611647642926","left":"2335.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.6488303557466412":{"definition":"//\n// image threshold\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'image threshold'\n//\n// initialization\n//\nvar init = function() {\n   mod.threshold.value = 0.5\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         threshold_image()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // threshold value\n   //\n   div.appendChild(document.createTextNode('threshold (0-1): '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         threshold_image()\n         })\n      div.appendChild(input)\n      mod.threshold = input\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// threshold image\n//\nfunction threshold_image() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var t = parseFloat(mod.threshold.value)\n   var ctx = mod.img.getContext(\"2d\")\n   ctx.putImageData(mod.input,0,0)\n   var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,threshold:t,\n      buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var t = evt.data.threshold\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var r,g,b,a,i\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            r = buf[(h-1-row)*w*4+col*4+0] \n            g = buf[(h-1-row)*w*4+col*4+1] \n            b = buf[(h-1-row)*w*4+col*4+2] \n            a = buf[(h-1-row)*w*4+col*4+3] \n            i = (r+g+b)/(3*255)\n            if (a == 0)\n               val = 255\n            else if (i > t)\n               var val = 255\n            else\n               var val = 0\n            buf[(h-1-row)*w*4+col*4+0] = val\n            buf[(h-1-row)*w*4+col*4+1] = val\n            buf[(h-1-row)*w*4+col*4+2] = val\n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1420.611647642926","left":"3978.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.2892270043957246":{"definition":"//\n// view toolpath\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// todo:\n//    erase and update new path\n//    show depth info\n//    show size\n//    calculate camera far\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'view toolpath'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   toolpath:{type:'object',\n      event:function(evt){\n         mod.path = evt.detail.path\n         mod.name = evt.detail.name\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         mod.depth = evt.detail.depth\n         show_path_info()\n         show_path()\n         outputs.toolpath.event()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   toolpath:{type:'object',\n      event:function(){\n         cmd = {}\n         cmd.path = mod.path\n         cmd.name = mod.name\n         cmd.dpi = mod.dpi\n         cmd.width = mod.width\n         cmd.height = mod.height\n         mods.output(mod,'toolpath',cmd)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // info\n   //\n   var text = document.createTextNode('name: ')\n      div.appendChild(text)\n      mod.nametext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(mm)')\n      div.appendChild(text)\n      mod.mmtext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(in)')\n      div.appendChild(text)\n      mod.intext = text\n   //\n   // view\n   //   \n   div.appendChild(document.createElement('br'))   \n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n         var text = document.createTextNode('view')\n            span.appendChild(text)\n         btn.appendChild(span)\n      btn.addEventListener('click',function(){\n         open_view_window()\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// show_path_info\n//\nfunction show_path_info() {\n   mod.nametext.nodeValue = 'name: '+mod.name\n   var width = (25.4*mod.width/mod.dpi).toFixed(3)\n   var height = (25.4*mod.height/mod.dpi).toFixed(3)\n   var depth = (25.4*mod.depth/mod.dpi).toFixed(3)\n   if (mod.depth == undefined)\n      mod.mmtext.nodeValue = width+' x '+height+' (mm)'\n   else\n      mod.mmtext.nodeValue = width+' x '+height+' x '+depth+' (mm)'\n   var width = (mod.width/mod.dpi).toFixed(3)\n   var height = (mod.height/mod.dpi).toFixed(3)\n   var depth = (mod.depth/mod.dpi).toFixed(3)\n   if (mod.depth == undefined)\n      mod.intext.nodeValue = width+' x '+height+' (in)'\n   else\n      mod.intext.nodeValue = width+' x '+height+' x '+depth+' (in)'\n   mods.fit(mod.div)\n   }\n//\n// show_path\n//\nfunction show_path() {\n   var scene = mod.scene\n   var camera = mod.camera\n   var renderer = mod.renderer\n   //\n   // check if view window open\n   //\n   if (mod.win == undefined) {\n      open_view_window()\n      return\n      }\n   //\n   // check for path\n   //\n   if (mod.path == undefined)\n      return\n   //\n   // clear scene, leave camera\n   //\n   var length = scene.children.length\n   for (var c = (length-1); c > 1; --c) {\n      scene.remove(scene.children[c])\n      }\n   //\n   // fit camera\n   //\n   mod.thetaxy = 0\n   mod.thetaz = 0\n   mod.r = mod.height/2\n   mod.x0 = mod.width/2\n   mod.y0 = mod.height/2\n   camera.position.set(mod.x0,mod.y0,mod.r)\n   camera.up = new THREE.Vector3(0,1,0)\n   camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n   camera.updateProjectionMatrix()\n   //\n   // draw segments\n   //\n   var arrow_size = 1+mod.width/200\n   var path = mod.path\n   for (var segment = 0; segment < path.length; ++segment) {\n      if (segment > 0)\n         add_arrow(path[segment-1][path[segment-1].length-1],path[segment][0],0xff0000,arrow_size)         \n      for (var point = 1; point < path[segment].length; ++point) {\n         add_arrow(path[segment][point-1],path[segment][point],0x0000ff,arrow_size)\n         }\n      }\n   //\n   // add axes\n   //\n   var length = mod.height/10\n   add_arrow([0,0,0],[length,0,0],0xff0000,arrow_size)\n   add_arrow([0,0,0],[0,length,0],0x00ff00,arrow_size)\n   add_arrow([0,0,0],[0,0,length],0x0000ff,arrow_size)\n   //\n   // render\n   //\n   update()\n   //\n   // add_arrow\n   //\n   function add_arrow(start,stop,color,size) {\n      var origin = new THREE.Vector3().fromArray(start)\n      if (mod.depth == undefined)\n         origin.z = 0\n      var end  = new THREE.Vector3().fromArray(stop)\n      if (mod.depth == undefined)\n         end.z = 0\n      var length = new THREE.Vector3().subVectors(end,origin).length()\n      if (length <= size) {\n         add_line(origin,end,color)\n         //length = 1.1*size\n         return\n         }\n      var direction = new THREE.Vector3().subVectors(end,origin).normalize()\n      var arrow = new THREE.ArrowHelper(direction,origin,length,color,size,size)\n      scene.add(arrow)\n      }\n   //\n   // add_line\n   //\n   function add_line(start,stop,colorhex) {\n      var geometry = new THREE.Geometry()\n      geometry.vertices.push(start,stop)\n      var material = new THREE.LineBasicMaterial({color:colorhex})\n      var line = new THREE.Line(geometry,material)\n      scene.add(line)\n      }\n   //\n   // update\n   //\n   function update() {\n\t   renderer.render(scene,camera)\n      }\n   }\n//\n// open_view_window\n//\nfunction open_view_window() {\n   //\n   // globals\n   //\n   var container,scene,camera,renderer,win,controls\n   //\n   // open the window\n   //\n   open_window()\n   //\n   // open_window\n   //\n   function open_window() {\n      //\n      // open window\n      //\n      win = window.open('')\n      mod.win = win\n      //\n      // load three.js\n      //\n      var script = document.createElement('script')\n      script.type = 'text/javascript'\n      script.onload = init_window\n      script.src = 'js/three.js/three.min.js'\n      mod.div.appendChild(script)\n      }\n   //\n   // init_window\n   //\n   function init_window() {\n      //\n      // close button\n      //\n      var btn = document.createElement('button')\n         btn.appendChild(document.createTextNode('close'))\n         btn.style.padding = mods.ui.padding\n         btn.style.margin = 1\n         btn.addEventListener('click',function(){\n            win.close()\n            mod.win = undefined\n            })\n         win.document.body.appendChild(btn)\n      //\n      // label text\n      //\n      var text = win.document.createTextNode(' left: pan, right: rotate, scroll: zoom')\n         win.document.body.appendChild(text)\n      //\n      // GL container\n      //\n      win.document.body.appendChild(document.createElement('br'))   \n      container = win.document.createElement('div')\n      container.style.overflow = 'hidden'\n      win.document.body.appendChild(container)\n      //\n      // event handlers\n      //\n      container.addEventListener('contextmenu',context_menu)\n      container.addEventListener('mousedown',mouse_down)\n      container.addEventListener('mouseup',mouse_up)\n      container.addEventListener('mousemove',mouse_move)\n      container.addEventListener('wheel',mouse_wheel)\n      //\n      // add scene\n      //\n\t   scene = new THREE.Scene()\n\t   mod.scene = scene\n\t   var width = win.innerWidth\n\t   var height = win.innerHeight\n\t   var aspect = width/height\n\t   var near = 0.1\n\t   var far = 1000000\n\t   camera = new THREE.PerspectiveCamera(90,aspect,near,far)\n\t   mod.camera = camera\n\t   scene.add(camera)\n\t   //\n\t   // add renderer\n\t   //\n      renderer = new THREE.WebGLRenderer({antialias:true})\n      mod.renderer = renderer\n      renderer.setClearColor(0xffffff)\n\t   renderer.setSize(width,height)\n\t   container.appendChild(renderer.domElement)\n      //\n      // show the path if available\n      //\n      show_path()\n      }\n   //\n   // context_menu\n   //\n   function context_menu(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      return (false)\n      }\n   //\n   // mouse_down\n   //\n   function mouse_down(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      mod.button = evt.button\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      }\n   //\n   // mouse_up\n   //\n   function mouse_up(evt) {\n      mod.button = undefined\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      }\n   //\n   // mouse_move\n   //\n   function mouse_move(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      var dx = evt.clientX-mod.x\n      var dy = evt.clientY-mod.y\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      if (mod.button == 0) {\n         mod.x0 += \n            Math.sin(mod.thetaz)*mod.height*dy/win.innerHeight\n            -Math.cos(mod.thetaz)*mod.width*dx/win.innerWidth\n         mod.y0 += \n            Math.cos(mod.thetaz)*mod.height*dy/win.innerHeight\n            +Math.sin(mod.thetaz)*mod.width*dx/win.innerWidth\n         camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t      camera.up = new THREE.Vector3(Math.sin(mod.thetaz),Math.cos(mod.thetaz),0)\n\t      camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n         camera.updateProjectionMatrix()\n\t      renderer.render(scene,camera)\n\t      }\n      else if (mod.button == 2) {\n         mod.thetaxy += dy/win.innerHeight\n         mod.thetaz += dx/win.innerWidth\n         camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t      camera.up = new THREE.Vector3(Math.sin(mod.thetaz),Math.cos(mod.thetaz),0)\n\t      camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n         camera.updateProjectionMatrix()\n\t      renderer.render(scene,camera)\n\t      }\n      }\n   //\n   // mouse_wheel\n   //\n   function mouse_wheel(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      var dy = evt.deltaY/win.innerHeight\n      mod.r += mod.height*dy\n      camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n      camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n      camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t   camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n      camera.updateProjectionMatrix()\n\t   renderer.render(scene,camera)\n      }\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"2124.611647642926","left":"3308.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.9557599338778935":{"definition":"//\n// mill raster 2D\n//\n// Neil Gershenfeld\n// (c) Massachusetts Institute of Technology 2016\n//\n// This work may be reproduced, modified, distributed, performed, and\n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is\n// provided as is; no warranty is provided, and users accept all\n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'mill raster 2D'\n//\n// initialization\n//\nvar init = function() {\n   mod.dia_in.value = 0.0156\n   mod.dia_mm.value = 25.4*parseFloat(mod.dia_in.value)\n   mod.cut_in.value = 0.004\n   mod.cut_mm.value = 25.4*parseFloat(mod.cut_in.value)\n   mod.max_in.value = 0.004\n   mod.max_mm.value = 25.4*parseFloat(mod.max_in.value)\n   mod.number.value = 4\n   mod.stepover.value = 0.5\n   mod.merge.value = 1\n   mod.sort.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   imageInfo:{type:'object',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.width\n         ctx.canvas.height = mod.height\n         }},\n   path:{type:'array',\n      event:function(evt){\n         if (mod.label.nodeValue == 'calculating') {\n            draw_path(evt.detail)\n            accumulate_path(evt.detail)\n            mod.offsetCount += 1\n            if ((mod.offsetCount != parseInt(mod.number.value)) && (evt.detail.length > 0)) {\n               mod.offset += parseFloat(mod.stepover.value)\n               outputs.offset.event()\n               }\n            else {\n               mod.label.nodeValue = 'calculate'\n               mod.labelspan.style.fontWeight = 'normal'\n               merge_path()\n               clear_path()\n               draw_path(mod.path)\n               draw_connections()\n               add_depth()\n               outputs.toolpath.event()\n               }\n            }\n         }\n      },\n   settings:{type:'object',\n      event:function(evt){\n         set_values(evt.detail)\n         }\n      }\n   }\n//\n// outputs\n//\nvar outputs = {\n   diameter:{type:'number',\n      event:function(){\n         mods.output(mod,'diameter',Math.ceil(mod.dpi*mod.dia_in.value))\n         }\n      },\n   offset:{type:'number',\n      event:function(){\n         var pixels = mod.offset*parseFloat(mod.dia_in.value)*mod.dpi\n         mods.output(mod,'offset',pixels)\n         }\n      },\n   toolpath:{type:'object',\n      event:function(){\n         cmd = {}\n         cmd.path = mod.path\n         cmd.name = mod.name\n         cmd.dpi = mod.dpi\n         cmd.width = mod.width\n         cmd.height = mod.height\n         cmd.depth = mod.depth\n         mods.output(mod,'toolpath',cmd)\n         }\n      }\n   }\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // tool diameter\n   //\n   div.appendChild(document.createTextNode('tool diameter'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.dia_in.value = parseFloat(mod.dia_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.dia_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.dia_mm.value = parseFloat(mod.dia_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.dia_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // cut depth\n   //\n   div.appendChild(document.createTextNode('cut depth'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.cut_in.value = parseFloat(mod.cut_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.cut_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.cut_mm.value = parseFloat(mod.cut_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.cut_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // max depth\n   //\n   div.appendChild(document.createTextNode('max depth'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.max_in.value = parseFloat(mod.max_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.max_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.max_mm.value = parseFloat(mod.max_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.max_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // offset number\n   //\n   div.appendChild(document.createTextNode('offset number: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.number = input\n   div.appendChild(document.createTextNode(' (0 = fill)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // offset stepover\n   //\n   div.appendChild(document.createTextNode('offset stepover: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.stepover = input\n   div.appendChild(document.createTextNode(' (1 = diameter)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // direction\n   //\n   div.appendChild(document.createTextNode('direction: '))\n   div.appendChild(document.createTextNode('climb'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'direction'\n      input.id = mod.div.id+'climb'\n      input.checked = true\n      div.appendChild(input)\n      mod.climb = input\n   div.appendChild(document.createTextNode(' conventional'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'direction'\n      input.id = mod.div.id+'conventional'\n      div.appendChild(input)\n      mod.conventional = input\n   div.appendChild(document.createElement('br'))\n   //\n   // path merge\n   //\n   div.appendChild(document.createTextNode('path merge: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.merge = input\n   div.appendChild(document.createTextNode(' (1 = diameter)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // path order\n   //\n   div.appendChild(document.createTextNode('path order: '))\n   div.appendChild(document.createTextNode('forward'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'order'\n      input.id = mod.div.id+'forward'\n      input.checked = true\n      div.appendChild(input)\n      mod.forward = input\n   div.appendChild(document.createTextNode(' reverse'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'order'\n      input.id = mod.div.id+'reverse'\n      div.appendChild(input)\n      mod.reverse = input\n   div.appendChild(document.createElement('br'))\n   //\n   // sort distance\n   //\n   div.appendChild(document.createTextNode('sort distance: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.id = mod.div.id+'sort'\n      div.appendChild(input)\n      mod.sort = input\n   div.appendChild(document.createElement('br'))\n   //\n   // calculate\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n         var text = document.createTextNode('calculate')\n            mod.label = text\n            span.appendChild(text)\n         mod.labelspan = span\n         btn.appendChild(span)\n      btn.addEventListener('click',function(){\n         mod.label.nodeValue = 'calculating'\n         mod.labelspan.style.fontWeight = 'bold'\n         mod.offset = 0.5\n         mod.offsetCount = 0\n         mod.path = []\n         clear_path()\n         outputs.diameter.event()\n         outputs.offset.event()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createTextNode(' '))\n   //\n   // view\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var svg = document.getElementById(mod.div.id+'svg')\n         var clone = svg.cloneNode(true)\n         clone.setAttribute('width',mod.img.width)\n         clone.setAttribute('height',mod.img.height)\n         win.document.body.appendChild(clone)\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // on-screen SVG\n   //\n   var svgNS = \"http://www.w3.org/2000/svg\"\n   var svg = document.createElementNS(svgNS,\"svg\")\n   svg.setAttribute('id',mod.div.id+'svg')\n   svg.setAttributeNS(\"http://www.w3.org/2000/xmlns/\",\n      \"xmlns:xlink\",\"http://www.w3.org/1999/xlink\")\n   svg.setAttribute('width',mods.ui.canvas)\n   svg.setAttribute('height',mods.ui.canvas)\n   svg.style.backgroundColor = 'rgb(255,255,255)'\n   var g = document.createElementNS(svgNS,'g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   div.appendChild(svg)\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   }\n//\n// local functions\n//\n// set_values\n//\nfunction set_values(settings) {\n   for (var s in settings) {\n      switch(s) {\n         case 'tool diameter (in)':\n            mod.dia_in.value = settings[s]\n            mod.dia_mm.value = parseFloat(mod.dia_in.value)*25.4\n            break\n         case 'cut depth (in)':\n            mod.cut_in.value = settings[s]\n            mod.cut_mm.value = parseFloat(mod.cut_in.value)*25.4\n            break\n         case 'max depth (in)':\n            mod.max_in.value = settings[s]\n            mod.max_mm.value = parseFloat(mod.max_in.value)*25.4\n            break\n         case 'offset number':\n            mod.number.value = settings[s]\n            break\n         }\n      }\n   }\n//\n// clear_path\n//\nfunction clear_path() {\n   var svg = document.getElementById(mod.div.id+'svg')\n   svg.setAttribute('viewBox',\"0 0 \"+(mod.img.width-1)+\" \"+(mod.img.height-1))\n   var g = document.getElementById(mod.div.id+'g')\n   svg.removeChild(g)\n   var g = document.createElementNS('http://www.w3.org/2000/svg','g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   }\n//\n// accumulate_path\n//    todo: replace inefficient insertion sort\n//    todo: move sort out of main thread\n//\nfunction accumulate_path(path) {\n   var forward = mod.forward.checked\n   var conventional = mod.conventional.checked\n   var sort = mod.sort.checked\n   for (var segnew = 0; segnew < path.length; ++segnew) {\n      if (conventional)\n         path[segnew].reverse()\n      if (mod.path.length == 0)\n         mod.path.splice(0,0,path[segnew])\n      else if (sort) {\n         var xnew = path[segnew][0][0]\n         var ynew = path[segnew][0][1]\n         var dmin = Number.MAX_VALUE\n         var segmin = -1\n         for (var segold = 0; segold < mod.path.length; ++segold) {\n            var xold = mod.path[segold][0][0]\n            var yold = mod.path[segold][0][1]\n            var dx = xnew-xold\n            var dy = ynew-yold\n            var d = Math.sqrt(dx*dx+dy*dy)\n            if (d < dmin) {\n               dmin = d\n               segmin = segold\n               }\n            }\n         if (forward)\n            mod.path.splice(segmin+1,0,path[segnew])\n         else\n            mod.path.splice(segmin,0,path[segnew])\n         }\n      else {\n         if (forward)\n            mod.path.splice(mod.path.length,0,path[segnew])\n         else\n            mod.path.splice(0,0,path[segnew])\n         }\n      }\n   }\n//\n// merge_path\n//\nfunction merge_path() {\n   var dmerge = mod.dpi*parseFloat(mod.merge.value)*parseFloat(mod.dia_in.value)\n   var seg = 0\n   while (seg < (mod.path.length-1)) {\n      var xold = mod.path[seg][mod.path[seg].length-1][0]\n      var yold = mod.path[seg][mod.path[seg].length-1][1]\n      var xnew = mod.path[seg+1][0][0]\n      var ynew = mod.path[seg+1][0][1]\n      var dx = xnew-xold\n      var dy = ynew-yold\n      var d = Math.sqrt(dx*dx+dy*dy)\n      if (d < dmerge)\n         mod.path.splice(seg,2,mod.path[seg].concat(mod.path[seg+1]))\n      else\n         seg += 1\n      }\n   }\n//\n// add_depth\n//\nfunction add_depth() {\n   var cut = parseFloat(mod.cut_in.value)\n   var max = parseFloat(mod.max_in.value)\n   var newpath = []\n   for (var seg = 0; seg < mod.path.length; ++seg) {\n      var depth = cut\n      if ((mod.path[seg][0][0] == mod.path[seg][mod.path[seg].length-1][0])\n         && (mod.path[seg][0][0] == mod.path[seg][mod.path[seg].length-1][0])) {\n         var newseg = []\n         while (depth <= max) {\n            var idepth = -Math.round(mod.dpi*depth)\n            for (var pt = 0; pt < mod.path[seg].length; ++pt) {\n               var point = mod.path[seg][pt].concat(idepth)\n               newseg.splice(newseg.length,0,point)\n               }\n            if (depth == max)\n               break\n            depth += cut\n            if (depth > max)\n               depth = max\n            }\n         newpath.splice(newpath.length,0,newseg)\n         }\n      else {\n         var newseg = []\n         while (depth <= max) {\n            var idepth = -Math.round(mod.dpi*depth)\n            for (var pt = 0; pt < mod.path[seg].length; ++pt) {\n               var point = mod.path[seg][pt].concat(idepth)\n               newseg.splice(newseg.length,0,point)\n               }\n            newpath.splice(newpath.length,0,newseg)\n            newseg = []\n            if (depth == max)\n               break\n            depth += cut\n            if (depth > max)\n               depth = max\n            }\n         }\n      }\n   mod.path = newpath\n   mod.depth = Math.round(parseFloat(mod.max_in.value)*mod.dpi)\n   }\n//\n// draw_path\n//\nfunction draw_path(path) {\n   var g = document.getElementById(mod.div.id+'g')\n   var h = mod.img.height\n   var w = mod.img.width\n   var xend = null\n   var yend = null\n   //\n   // loop over segments\n   //\n   for (var segment = 0; segment < path.length; ++segment) {\n      if (path[segment].length > 1) {\n         //\n         // loop over points\n         //\n         for (var point = 1; point < path[segment].length; ++point) {\n            var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n            line.setAttribute('stroke','black')\n            line.setAttribute('stroke-width',1)\n            line.setAttribute('stroke-linecap','round')\n            var x1 = path[segment][point-1][0]\n            var y1 = h-path[segment][point-1][1]-1\n            var x2 = path[segment][point][0]\n            var y2 = h-path[segment][point][1]-1\n            xend = x2\n            yend = y2\n            line.setAttribute('x1',x1)\n            line.setAttribute('y1',y1)\n            line.setAttribute('x2',x2)\n            line.setAttribute('y2',y2)\n            var dx = x2-x1\n            var dy = y2-y1\n            var d = Math.sqrt(dx*dx+dy*dy)\n            if (d > 0) {\n               nx = 6*dx/d\n               ny = 6*dy/d\n               var tx = 3*dy/d\n               var ty = -3*dx/d\n               g.appendChild(line)\n               triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n               triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                  +' '+(x2-nx-tx)+','+(y2-ny-ty))\n               triangle.setAttribute('fill','black')\n               g.appendChild(triangle)\n               }\n            }\n         }\n      }\n   }\n//\n// draw_connections\n//\nfunction draw_connections() {\n   var g = document.getElementById(mod.div.id+'g')\n   var h = mod.img.height\n   var w = mod.img.width\n   //\n   // loop over segments\n   //\n   for (var segment = 1; segment < mod.path.length; ++segment) {\n      //\n      // draw connection from previous segment\n      //\n      var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n      line.setAttribute('stroke','red')\n      line.setAttribute('stroke-width',1)\n      line.setAttribute('stroke-linecap','round')\n      var x1 = mod.path[segment-1][mod.path[segment-1].length-1][0]\n      var y1 = h-mod.path[segment-1][mod.path[segment-1].length-1][1]-1\n      var x2 = mod.path[segment][0][0]\n      var y2 = h-mod.path[segment][0][1]-1\n      line.setAttribute('x1',x1)\n      line.setAttribute('y1',y1)\n      line.setAttribute('x2',x2)\n      line.setAttribute('y2',y2)\n      var dx = x2-x1\n      var dy = y2-y1\n      var d = Math.sqrt(dx*dx+dy*dy)\n      if (d > 0) {\n         nx = 6*dx/d\n         ny = 6*dy/d\n         var tx = 3*dy/d\n         var ty = -3*dx/d\n         g.appendChild(line)\n         triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n         triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n            +' '+(x2-nx-tx)+','+(y2-ny-ty))\n         triangle.setAttribute('fill','red')\n         g.appendChild(triangle)\n         }\n      }\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n\n","top":"1345.611647642926","left":"3331.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.10309904694903338":{"definition":"//\n// vectorize\n//    input is red 128:north,64:south, green 128:east,64:west, blue 128:start,64:stop\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'vectorize'\n//\n// initialization\n//\nvar init = function() {\n   mod.error.value = 1\n   mod.sort.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         vectorize()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   path:{type:'array',\n      event:function(){\n         mods.output(mod,'path',mod.path)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen SVG\n   //\n   var svgNS = \"http://www.w3.org/2000/svg\"\n   var svg = document.createElementNS(svgNS,\"svg\")\n   svg.setAttribute('id',mod.div.id+'svg')\n   svg.setAttributeNS(\"http://www.w3.org/2000/xmlns/\",\n      \"xmlns:xlink\",\"http://www.w3.org/1999/xlink\")\n   svg.setAttribute('width',mods.ui.canvas)\n   svg.setAttribute('height',mods.ui.canvas)\n   svg.style.backgroundColor = 'rgb(255,255,255)'\n   var g = document.createElementNS(svgNS,'g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   div.appendChild(svg)\n   div.appendChild(document.createElement('br'))   \n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // error value\n   //\n   div.appendChild(document.createTextNode('vector fit (pixels): '))\n   //div.appendChild(document.createElement('br'))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         vectorize()\n         })\n      div.appendChild(input)\n      mod.error = input\n   div.appendChild(document.createElement('br'))\n   //\n   // sort\n   //\n   div.appendChild(document.createTextNode('sort distance: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.id = mod.div.id+'sort'\n      div.appendChild(input)\n      mod.sort = input\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var svg = document.getElementById(mod.div.id+'svg')\n         var clone = svg.cloneNode(true)\n         clone.setAttribute('width',mod.img.width)\n         clone.setAttribute('height',mod.img.height)\n         win.document.body.appendChild(clone)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// vectorize\n//\nfunction vectorize() {\n   //\n   // draw path\n   //\n   function draw_path(path) {\n      window.URL.revokeObjectURL(url)\n      var svg = document.getElementById(mod.div.id+'svg')\n      svg.setAttribute('viewBox',\"0 0 \"+(mod.img.width-1)+\" \"+(mod.img.height-1))\n      var g = document.getElementById(mod.div.id+'g')\n      svg.removeChild(g)\n      var g = document.createElementNS('http://www.w3.org/2000/svg','g')\n      g.setAttribute('id',mod.div.id+'g')\n      var h = mod.img.height\n      var w = mod.img.width\n      var xend = null\n      var yend = null\n      //\n      // loop over segments\n      //\n      for (var segment in path) {\n         if (path[segment].length > 1) {\n            if (xend != null) {\n               //\n               // draw connection from previous segment\n               //\n               var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n               line.setAttribute('stroke','red')\n               line.setAttribute('stroke-width',1)\n               line.setAttribute('stroke-linecap','round')\n               var x1 = xend\n               var y1 = yend\n               var x2 = path[segment][0][0]\n               var y2 = h-path[segment][0][1]-1\n               line.setAttribute('x1',x1)\n               line.setAttribute('y1',y1)\n               line.setAttribute('x2',x2)\n               line.setAttribute('y2',y2)\n               var dx = x2-x1\n               var dy = y2-y1\n               var d = Math.sqrt(dx*dx+dy*dy)\n               if (d > 0) {\n                  nx = 6*dx/d\n                  ny = 6*dy/d\n                  var tx = 3*dy/d\n                  var ty = -3*dx/d\n                  g.appendChild(line)\n                  triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n                  triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                     +' '+(x2-nx-tx)+','+(y2-ny-ty))\n                  triangle.setAttribute('fill','red')\n                  g.appendChild(triangle)\n                  }\n               }\n            //\n            // loop over points\n            //\n            for (var point = 1; point < path[segment].length; ++point) {\n               var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n               line.setAttribute('stroke','black')\n               line.setAttribute('stroke-width',1)\n               line.setAttribute('stroke-linecap','round')\n               var x1 = path[segment][point-1][0]\n               var y1 = h-path[segment][point-1][1]-1\n               var x2 = path[segment][point][0]\n               var y2 = h-path[segment][point][1]-1\n               xend = x2\n               yend = y2\n               line.setAttribute('x1',x1)\n               line.setAttribute('y1',y1)\n               line.setAttribute('x2',x2)\n               line.setAttribute('y2',y2)\n               var dx = x2-x1\n               var dy = y2-y1\n               var d = Math.sqrt(dx*dx+dy*dy)\n               if (d > 0) {\n                  nx = 6*dx/d\n                  ny = 6*dy/d\n                  var tx = 3*dy/d\n                  var ty = -3*dx/d\n                  g.appendChild(line)\n                  triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n                  triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                     +' '+(x2-nx-tx)+','+(y2-ny-ty))\n                  triangle.setAttribute('fill','black')\n                  g.appendChild(triangle)\n                  }\n               }\n            }\n         }\n      svg.appendChild(g)\n      }\n   //\n   // set up worker\n   //\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      webworker.terminate()\n      mod.path = evt.data.path\n      draw_path(mod.path)\n      outputs.path.event()\n      })\n   //\n   // call worker\n   //\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,sort:mod.sort.checked,\n      error:parseFloat(mod.error.value),\n      buffer:mod.input.data.buffer})\n   }\n//\n// vectorize worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var sort = evt.data.sort\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var northsouth = 0\n      var north = 128\n      var south = 64\n      var eastwest = 1\n      var east = 128\n      var west = 64\n      var startstop = 2\n      var start = 128\n      var stop = 64\n      var path = []\n      //\n      // edge follower\n      //\n      function follow_edges(row,col) {\n         if ((input[(h-1-row)*w*4+col*4+northsouth] != 0)\n            || (input[(h-1-row)*w*4+col*4+eastwest] != 0)) {\n            path[path.length] = [[col,row]]\n            while (1) {\n               if (input[(h-1-row)*w*4+col*4+northsouth] & north) {\n                  input[(h-1-row)*w*4+col*4+northsouth] =\n                     input[(h-1-row)*w*4+col*4+northsouth] & ~north\n                  row += 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+northsouth] & south) {\n                  input[(h-1-row)*w*4+col*4+northsouth] =\n                     input[(h-1-row)*w*4+col*4+northsouth] & ~south\n                  row -= 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+eastwest] & east) {\n                  input[(h-1-row)*w*4+col*4+eastwest] =\n                     input[(h-1-row)*w*4+col*4+eastwest] & ~east\n                  col += 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+eastwest] & west) {\n                  input[(h-1-row)*w*4+col*4+eastwest] =\n                     input[(h-1-row)*w*4+col*4+eastwest] & ~west\n                  col -= 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else\n                  break\n               }\n            }\n         }\n      //\n      // follow boundary starts\n      //\n      for (var row = 1; row < (h-1); ++row) {\n         col = 0\n         follow_edges(row,col)\n         col = w-1\n         follow_edges(row,col)\n         }\n      for (var col = 1; col < (w-1); ++col) {\n         row = 0\n         follow_edges(row,col)\n         row = h-1      \n         follow_edges(row,col)\n         }\n      //\n      // follow interior paths\n      //\n      for (var row = 1; row < (h-1); ++row) {\n         for (var col = 1; col < (w-1); ++col) {\n            follow_edges(row,col)\n            }\n         }\n      //\n      // vectorize path\n      //\n      var error = evt.data.error\n      var vecpath = []\n      for (var seg = 0; seg < path.length; ++seg) {\n         var x0 = path[seg][0][0]\n         var y0 = path[seg][0][1]\n         vecpath[vecpath.length] = [[x0,y0]]\n         var xsum = x0\n         var ysum = y0\n         var sum = 1\n         for (var pt = 1; pt < path[seg].length; ++pt) {\n            var xold = x\n            var yold = y\n            var x = path[seg][pt][0]\n            var y = path[seg][pt][1]\n            if (sum == 1) {\n               xsum += x\n               ysum += y\n               sum += 1\n               }\n            else {\n               var xmean = xsum/sum\n               var ymean = ysum/sum\n               var dx = xmean-x0\n               var dy = ymean-y0\n               var d = Math.sqrt(dx*dx+dy*dy)\n               var nx = dy/d\n               var ny = -dx/d\n               var l = Math.abs(nx*(x-x0)+ny*(y-y0))\n               if (l < error) {\n                  xsum += x\n                  ysum += y\n                  sum += 1\n                  }\n               else {\n                  vecpath[vecpath.length-1][vecpath[vecpath.length-1].length] = [xold,yold]\n                  x0 = xold\n                  y0 = yold\n                  xsum = xold\n                  ysum = yold\n                  sum = 1\n                  }\n               }\n            if (pt == (path[seg].length-1)) {\n               vecpath[vecpath.length-1][vecpath[vecpath.length-1].length] = [x,y]\n               }\n            }\n         }\n      //\n      // sort path\n      //\n      if ((vecpath.length > 1) && (sort == true)) {\n         var dmin = w*w+h*h\n         segmin = null\n         for (var seg = 0; seg < vecpath.length; ++seg) {\n            var x = vecpath[seg][0][0]\n            var y = vecpath[seg][0][0]\n            var d = x*x+y*y\n            if (d < dmin) {\n               dmin = d\n               segmin = seg\n               }\n            }\n         if (segmin != null) {\n            var sortpath = [vecpath[segmin]]\n            vecpath.splice(segmin,1)\n            }\n         while (vecpath.length > 0) {\n            var dmin = w*w+h*h\n            var x0 = sortpath[sortpath.length-1][sortpath[sortpath.length-1].length-1][0]\n            var y0 = sortpath[sortpath.length-1][sortpath[sortpath.length-1].length-1][1]\n            segmin = null\n            for (var seg = 0; seg < vecpath.length; ++seg) {\n               var x = vecpath[seg][0][0]\n               var y = vecpath[seg][0][1]\n               var d = (x-x0)*(x-x0)+(y-y0)*(y-y0)\n               if (d < dmin) {\n                  dmin = d\n                  segmin = seg\n                  }\n               }\n            if (segmin != null) {\n               sortpath[sortpath.length] = vecpath[segmin]\n               vecpath.splice(segmin,1)\n               }\n            }\n         }\n      else if (((vecpath.length > 1) && (sort == false)) || (vecpath.length == 1))\n         sortpath = vecpath\n      else\n         sortpath = []\n      //\n      // return path\n      //\n      self.postMessage({path:sortpath})\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1890.6116476429258","left":"4022.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.8622681794886853":{"definition":"//\n// save file\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'save file'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   file:{type:'object',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.contents = evt.detail.contents\n         save_file()\n         }}}\n//\n// outputs\n//\nvar outputs = {}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // info\n   //\n   var text = document.createTextNode('name:')\n      div.appendChild(text)\n      mod.nametext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('size:')\n      div.appendChild(text)\n      mod.sizetext = text\n   div.appendChild(document.createElement('br'))\n   }\n//\n// local functions\n//\nfunction save_file() {\n   var a = document.createElement('a')\n   a.setAttribute('href','data:text/plain;charset=utf-8,'+ \n      encodeURIComponent(mod.contents))\n   a.setAttribute('download',mod.name)\n   a.style.display = 'none'\n   document.body.appendChild(a)\n   a.click()\n   document.body.removeChild(a)\n   mod.nametext.nodeValue = 'name: '+mod.name\n   mods.fit(mod.div)\n   mod.sizetext.nodeValue = 'size: '+mod.contents.length\n   mods.fit(mod.div)\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"2112.9754468998394","left":"2827.7533689104926","filename":"modules/file/save","inputs":{},"outputs":{}},"0.992472539363189":{"definition":"//\n// set object\n//\n// Neil Gershenfeld\n// (c) Massachusetts Institute of Technology 2018\n//\n// This work may be reproduced, modified, distributed, performed, and\n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is\n// provided as is; no warranty is provided, and users accept all\n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'set PCB defaults'\n//\n// initialization\n//\nvar init = function() {\n   //\n   add_output('mill traces (1/64)')\n   add_variable('tool diameter (in)','var00')\n   mod.var00.value = '0.0156'\n   add_variable('cut depth (in)','var01')\n   mod.var01.value = '0.008'\n   add_variable('max depth (in)','var02')\n   mod.var02.value = '0.008'\n   add_variable('offset number','var03')\n   mod.var03.value = '4'\n   //\n   add_output('mill outline (1/32)')\n   add_variable('tool diameter (in)','var10')\n   mod.var10.value = '0.027559055118110236'\n   add_variable('cut depth (in)','var11')\n   mod.var11.value = '0.027559055118110236'\n   add_variable('max depth (in)','var12')\n   mod.var12.value = '0.072'\n   add_variable('offset number','var13')\n   mod.var13.value = '1'\n   //\n   }\n//\n// inputs\n//\nvar inputs = {}\n//\n// outputs\n//\nvar outputs = {\n   settings:{type:'',\n      event:function(vars){\n         mods.output(mod,'settings',vars)\n         }\n      }\n   }\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   }\n//\n// local functions\n//\nfunction add_output(label) {\n   if (mod.settings == undefined) {\n      mod.settings = {}\n      }\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n      var text = document.createTextNode(label)\n         span.appendChild(text)\n      btn.appendChild(span)\n      var f = function(label) {\n         btn.addEventListener('click',function() {\n            for (var s in mod.settings)\n               mod.settings[s].span.style.fontWeight = 'normal'\n            mod.settings[label].span.style.fontWeight = 'bold'\n            var vars = {}\n            for (var v in mod.settings[label].variables)\n               vars[v] = mod.settings[label].variables[v].value\n            outputs.settings.event(vars)\n            })\n         }(label)\n      mod.settings[label] = {span:span,variables:{}}\n      mod.div.appendChild(btn)\n      mod.setting = label\n   mod.div.appendChild(document.createElement('br'))\n   }\nfunction add_variable(label,variable) {\n   var text = document.createTextNode(label)\n      mod.div.appendChild(text)\n   mod.div.appendChild(document.createTextNode(': '))\n   input = document.createElement('input')\n      input.type = 'text'\n      input.size = 10\n      mod[variable] = input\n      mod.div.appendChild(input)\n   mod.settings[mod.setting].variables[label] = input \n   mod.div.appendChild(document.createElement('br'))\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1265.611647642926","left":"2787.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.8764917270856811":{"definition":"//\n// path to G-code\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2018\n// \n// Updated: Steven Chew\n// Date:    Feb 20 2019\n// Comments: Added option to output in inch or mm\n// Date:... Oct 28 2019\n// Comments: Corrected feedrate conversion\n//           - inch/s to inch/min\n//...........- mm/s to mm/min\n//\n// Updated: Neil Gershenfeld\n// Date: Oct 28 2020\n// Comments: added mm/s vs mm/min option\n//\n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'path to G-code'\n//\n// initialization\n//\nvar init = function() {\n   mod.cutspeed.value = '2.5'\n   mod.plungespeed.value = '2.5'\n   mod.jogheight.value = '2'\n   mod.spindlespeed.value = '11000'\n   mod.tool.value = '1'\n   mod.coolantoff.checked = true\n   mod.formatMm.checked = true\n   mod.unitMinutes.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   path:{type:'',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.path = evt.detail.path\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         make_path()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   file:{type:'',\n      event:function(str){\n         obj = {}\n         obj.name = mod.name+\".nc\"\n         obj.contents = str\n         mods.output(mod,'file',obj)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // cut speed\n   //\n   div.appendChild(document.createTextNode('cut speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.cutspeed = input\n   div.appendChild(document.createTextNode(' (mm/s)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // plunge speed\n   //\n   div.appendChild(document.createTextNode('plunge speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.plungespeed = input\n   div.appendChild(document.createTextNode(' (mm/s)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // jog height\n   //\n   div.appendChild(document.createTextNode('jog height: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.jogheight = input\n   div.appendChild(document.createTextNode(' (mm)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // spindle speed\n   //\n   div.appendChild(document.createTextNode('spindle speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.spindlespeed = input\n   div.appendChild(document.createTextNode(' (RPM)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // tool\n   //\n   div.appendChild(document.createTextNode('tool: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.tool = input\n   div.appendChild(document.createElement('br'))\n   //\n   // coolant\n   //\n   div.appendChild(document.createTextNode('coolant:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'coolant'\n      input.id = mod.div.id+'coolanton'\n      div.appendChild(input)\n      mod.coolanton = input\n   div.appendChild(document.createTextNode('on'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'coolant'\n      input.id = mod.div.id+'coolantoff'\n      div.appendChild(input)\n      mod.coolantoff = input\n   div.appendChild(document.createTextNode('off'))\n   div.appendChild(document.createElement('br'))\n   //\n   // inch or mm format\n   //\n   div.appendChild(document.createTextNode('format:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'format'\n      input.id = mod.div.id+'formatInch'\n      input.checked = true\n      div.appendChild(input)\n      mod.formatInch = input\n   div.appendChild(document.createTextNode('inch'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'format'\n      input.id = mod.div.id+'formatMm'\n      div.appendChild(input)\n      mod.formatMm = input\n   div.appendChild(document.createTextNode('mm'))\n   div.appendChild(document.createElement('br'))\n   //\n   // second or minute rate units \n   //\n   div.appendChild(document.createTextNode('rate units:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'units'\n      input.id = mod.div.id+'unitSeconds'\n      input.checked = true\n      div.appendChild(input)\n      mod.unitSeconds = input\n   div.appendChild(document.createTextNode('second'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'units'\n      input.id = mod.div.id+'unitMinutes'\n      div.appendChild(input)\n      mod.unitMinutes = input\n   div.appendChild(document.createTextNode('minute'))\n   }\n//\n// local functions\n//\nfunction make_path() {\n   var dx = 25.4*mod.width/mod.dpi\n   var cut_speed = parseFloat(mod.cutspeed.value)\n   var plunge_speed = parseFloat(mod.plungespeed.value)\n   var jog_height = parseFloat(mod.jogheight.value)\n   var nx = mod.width\n   var scale = dx/(nx-1)\n   var in_mm_scale = 1\n   if (mod.formatInch.checked) {\n      dx /= 25.4\n      scale /= 25.4\n      cut_speed /= 25.4\n      plunge_speed /= 25.4\n      jog_height /= 25.4\n      }\n   if (mod.unitMinutes.checked) {\n      cut_speed *= 60\n      plunge_speed *= 60\n      }\n   var spindle_speed = parseFloat(mod.spindlespeed.value)\n   var tool = parseInt(mod.tool.value)\n   str = \"%\\n\" // tape start\n   str += \"G17\\n\" // xy plane\n   if (mod.formatInch.checked)\n      str += \"G20\\n\" // inches\n   if (mod.formatMm.checked)\n      str += \"G21\\n\" // mm\n   str += \"G40\\n\" // cancel tool radius compensation\n   str += \"G49\\n\" // cancel tool length compensation\n   str += \"G54\\n\" // coordinate system 1\n   str += \"G80\\n\" // cancel canned cycles\n   str += \"G90\\n\" // absolute coordinates\n   str += \"G94\\n\" // feed/minute units\n   str += \"T\"+tool+\"M06\\n\" // tool selection, tool change\n   str += \"F\"+cut_speed.toFixed(4)+\"\\n\" // feed rate\n   str += \"S\"+spindle_speed+\"\\n\" // spindle speed\n   if (mod.coolanton.checked)\n      str += \"M08\\n\" // coolant on\n   str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\" // move up before starting spindle\n   str += \"M03\\n\" // spindle on clockwise\n   //str += \"G04 P1\\n\" // give spindle 1 second to spin up...........................comment out\n   //\n   // follow segments\n   //\n   for (var seg = 0; seg < mod.path.length; ++seg) {\n      //\n      // move up to starting point\n      //\n      x = scale*mod.path[seg][0][0]\n      y = scale*mod.path[seg][0][1]\n      str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\"\n      str += \"G00X\"+x.toFixed(4)+\"Y\"+y.toFixed(4)+\"Z\"+jog_height.toFixed(4)+\"\\n\"\n      //\n      // move down\n      //\n      z = scale*mod.path[seg][0][2]\n      str += \"G01Z\"+z.toFixed(4)+\" F\"+plunge_speed.toFixed(4)+\"\\n\"\n      str += \"F\"+cut_speed.toFixed(4)+\"\\n\" //restore xy feed rate\n      for (var pt = 1; pt < mod.path[seg].length; ++pt) {\n         //\n         // move to next point\n         //\n         x = scale*mod.path[seg][pt][0]\n         y = scale*mod.path[seg][pt][1]\n         z = scale*mod.path[seg][pt][2]\n         str += \"G01X\"+x.toFixed(4)+\"Y\"+y.toFixed(4)+\"Z\"+z.toFixed(4)+\"\\n\"\n         }\n      }\n   //\n   // finish\n   //\n   str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\" // move up before stopping spindle\n  //\n   str += \"G1X0Y0Z0\\n\" // movetoXYZ0\n  //\n   str += \"M05\\n\" // spindle stop\n   if (mod.coolanton.checked)\n      str += \"M09\\n\" // coolant off\n   str += \"M30\\n\" // program end and reset\n   str += \"%\\n\" // tape end\n   //\n   // output file\n   //\n   outputs.file.event(str)\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n\n","top":"1644.892543840524","left":"2796.9482640838332","filename":"modules/path/formats/g-code","inputs":{},"outputs":{}}},"links":["{\"source\":\"{\\\"id\\\":\\\"0.07944144280928633\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8903773266711255\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.47383876715576023\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"distances\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"distances\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.07944144280928633\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.08127540142793499\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.6488303557466412\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.6488303557466412\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.47383876715576023\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.08127540142793499\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"imageInfo\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"imageInfo\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"offset\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"offset\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"toolpath\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.2892270043957246\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"toolpath\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.8903773266711255\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.10309904694903338\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.10309904694903338\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"path\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"path\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.992472539363189\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"settings\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"settings\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.2892270043957246\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"toolpath\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8764917270856811\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"path\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.8764917270856811\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"file\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8622681794886853\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"file\\\"}\"}"]}))
+window.mods_prog_load(prog)
+</script>
+</body>
+</html>
diff --git a/docs/Instruction/images/proverXL/mods/mill_2D_PCB_png.txt b/docs/Instruction/images/proverXL/mods/mill_2D_PCB_png.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3fdbc2c7efd6026ea73d24b2871225647237fbbb
--- /dev/null
+++ b/docs/Instruction/images/proverXL/mods/mill_2D_PCB_png.txt
@@ -0,0 +1 @@
+{"modules":{"0.47383876715576023":{"definition":"//\n// distance transform \n//    assumes thresholded image, with zero intensity exterior\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'distance transform'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         distance_transform()}}}\n//\n// outputs\n//\nvar outputs = {\n   distances:{type:'F32',\n      event:function(){\n         mod.distances.height = mod.input.height\n         mod.distances.width = mod.input.width\n         mods.output(mod,'distances',mod.distances)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   div.appendChild(document.createElement('br'))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// distance transform function\n//\nfunction distance_transform() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      mod.distances = new Float32Array(evt.data.buffer)\n      var imgbuf = new Uint8ClampedArray(h*w*4)\n      var dmax = -Number.MAX_VALUE\n      for (var y = 0; y < h; ++y) {\n         for (var x = 0; x < w; ++x) {\n            if (mod.distances[(h-1-y)*w+x] > dmax)\n               dmax = mod.distances[(h-1-y)*w+x]\n            }\n         }\n      var i\n      for (var y = 0; y < h; ++y) {\n         for (var x = 0; x < w; ++x) {\n            i = 255*mod.distances[(h-1-y)*w+x]/dmax\n            imgbuf[(h-1-y)*w*4+x*4+0] = i\n            imgbuf[(h-1-y)*w*4+x*4+1] = i\n            imgbuf[(h-1-y)*w*4+x*4+2] = i\n            imgbuf[(h-1-y)*w*4+x*4+3] = 255\n            }\n         }\n      var imgdata = new ImageData(imgbuf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.distances.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var ctx = mod.img.getContext(\"2d\")\n   ctx.putImageData(mod.input,0,0)\n   var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,\n      buffer:img.data.buffer},\n      [img.data.buffer])\n   }\n//\n// distance transform worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var ny = evt.data.height\n      var nx = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Float32Array(nx*ny)\n      function distance(g,x,y,i) {\n         return ((y-i)*(y-i)+g[i][x]*g[i][x])\n         }\n      function intersection(g,x,y0,y1) {\n         return ((g[y0][x]*g[y0][x]-g[y1][x]*g[y1][x]+y0*y0-y1*y1)/(2.0*(y0-y1)))\n         }\n      //\n      // allocate arrays\n      //\n      var g = []\n      for (var y = 0; y < ny; ++y)\n         g[y] = new Uint32Array(nx)\n      var h = []\n      for (var y = 0; y < ny; ++y)\n         h[y] = new Uint32Array(nx)\n      var distances = []\n      for (var y = 0; y < ny; ++y)\n         distances[y] = new Uint32Array(nx)\n      var starts = new Uint32Array(ny)\n      var minimums = new Uint32Array(ny)\n      var d\n      //\n      // column scan\n      //  \n      for (var y = 0; y < ny; ++y) {\n         //\n         // right pass\n         //\n         var closest = -nx\n         for (var x = 0; x < nx; ++x) {\n            if (input[(ny-1-y)*nx*4+x*4+0] != 0) {\n               g[y][x] = 0\n               closest = x\n               }\n            else\n               g[y][x] = (x-closest)\n            }\n         //\n         // left pass\n         //\n         closest = 2*nx\n         for (var x = (nx-1); x >= 0; --x) {\n            if (input[(ny-1-y)*nx*4+x*4+0] != 0)\n               closest = x\n            else {\n               d = (closest-x)\n               if (d < g[y][x])\n                  g[y][x] = d\n               }\n            }\n         }\n      //\n      // row scan\n      //\n      for (var x = 0; x < nx; ++x) {\n         var segment = 0\n         starts[0] = 0\n         minimums[0] = 0\n         //\n         // down \n         //\n         for (var y = 1; y < ny; ++y) {\n            while ((segment >= 0) &&\n               (distance(g,x,starts[segment],minimums[segment]) > distance(g,x,starts[segment],y)))\n               segment -= 1\n            if (segment < 0) {\n               segment = 0\n               minimums[0] = y\n               }\n            else {\n               newstart = 1+intersection(g,x,minimums[segment],y)\n               if (newstart < ny) {\n                  segment += 1\n                  minimums[segment] = y\n                  starts[segment] = newstart\n                  }\n               }\n            }\n         //\n         // up \n         //\n         for (var y = (ny-1); y >= 0; --y) {\n            d = Math.sqrt(distance(g,x,y,minimums[segment]))\n            output[(ny-1-y)*nx+x] = d\n            if (y == starts[segment])\n               segment -= 1\n            }\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1209.611647642926","left":"3989.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.07944144280928633":{"definition":"//\n// edge detect\n//    green = interior, blue = exterior, red = boundary\n//    assumes input is thresholded\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'edge detect'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         edge_detect()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('green:interior, blue:exterior, red:boundary'))\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// edge detect\n//\nfunction edge_detect() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   webworker.postMessage({worker:worker.toString(),\n      height:mod.input.height,width:mod.input.width,\n      buffer:mod.input.data.buffer},\n      [mod.input.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Uint8ClampedArray(h*w*4)\n      var i00,i0m,i0p,im0,ip0,imm,imp,ipm,ipp,row,col\n      //\n      // find edges - interior\n      //\n      for (row = 1; row < (h-1); ++row) {\n         for (col = 1; col < (w-1); ++col) {\n            i00 = (input[(h-1-row)*w*4+col*4+0] \n                      +input[(h-1-row)*w*4+col*4+1] \n                      +input[(h-1-row)*w*4+col*4+2])\n            i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                      +input[(h-1-row)*w*4+(col+1)*4+1] \n                      +input[(h-1-row)*w*4+(col+1)*4+2])\n            ip0 = (input[(h-2-row)*w*4+col*4+0] \n                      +input[(h-2-row)*w*4+col*4+1] \n                      +input[(h-2-row)*w*4+col*4+2])\n            ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                      +input[(h-2-row)*w*4+(col+1)*4+1] \n                      +input[(h-2-row)*w*4+(col+1)*4+2])\n            i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                      +input[(h-1-row)*w*4+(col-1)*4+1] \n                      +input[(h-1-row)*w*4+(col-1)*4+2])\n            im0 = (input[(h-row)*w*4+col*4+0] \n                      +input[(h-row)*w*4+col*4+1] \n                      +input[(h-row)*w*4+col*4+2])\n            imm = (input[(h-row)*w*4+(col-1)*4+0] \n                      +input[(h-row)*w*4+(col-1)*4+1] \n                      +input[(h-row)*w*4+(col-1)*4+2])\n            imp = (input[(h-row)*w*4+(col+1)*4+0] \n                      +input[(h-row)*w*4+(col+1)*4+1] \n                      +input[(h-row)*w*4+(col+1)*4+2])\n            ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                      +input[(h-2-row)*w*4+(col-1)*4+1] \n                      +input[(h-2-row)*w*4+(col-1)*4+2])\n            if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp) \n               || (i00 != i0m) || (i00 != im0) || (i00 != imm)\n               || (i00 != imp) || (i00 != ipm)) {\n               output[(h-1-row)*w*4+col*4+0] = 255\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else if (i00 == 0) {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 255\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 255\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      //\n      // left and right edges\n      //\n      for (row = 1; row < (h-1); ++row) {\n         col = w-1\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         imm = (input[(h-row)*w*4+(col-1)*4+0] \n                   +input[(h-row)*w*4+(col-1)*4+1] \n                   +input[(h-row)*w*4+(col-1)*4+2])\n         ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                   +input[(h-2-row)*w*4+(col-1)*4+1] \n                   +input[(h-2-row)*w*4+(col-1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n        if ((i00 != i0m) || (i00 != ip0) || (i00 != ipm) \n           || (i00 != im0) || (i00 != imm)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         col = 0\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         imp = (input[(h-row)*w*4+(col+1)*4+0] \n                   +input[(h-row)*w*4+(col+1)*4+1] \n                   +input[(h-row)*w*4+(col+1)*4+2])\n         ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                   +input[(h-2-row)*w*4+(col+1)*4+1] \n                   +input[(h-2-row)*w*4+(col+1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n        if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp) \n           || (i00 != im0) || (i00 != imp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         }\n      //\n      // top and bottom edges\n      //\n      for (col = 1; col < (w-1); ++col) {\n         row = h-1\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         imm = (input[(h-row)*w*4+(col-1)*4+0] \n                   +input[(h-row)*w*4+(col-1)*4+1] \n                   +input[(h-row)*w*4+(col-1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         imp = (input[(h-row)*w*4+(col+1)*4+0] \n                   +input[(h-row)*w*4+(col+1)*4+1] \n                   +input[(h-row)*w*4+(col+1)*4+2])\n        if ((i00 != i0m) || (i00 != i0p) || (i00 != imm) \n           || (i00 != im0) || (i00 != imp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         row = 0\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                   +input[(h-2-row)*w*4+(col-1)*4+1] \n                   +input[(h-2-row)*w*4+(col-1)*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n         ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                   +input[(h-2-row)*w*4+(col+1)*4+1] \n                   +input[(h-2-row)*w*4+(col+1)*4+2])\n        if ((i00 != i0m) || (i00 != i0p) || (i00 != ipm) \n           || (i00 != ip0) || (i00 != ipp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         }\n      //\n      // corners\n      //\n      row = 0\n      col = 0\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                +input[(h-1-row)*w*4+(col+1)*4+1] \n                +input[(h-1-row)*w*4+(col+1)*4+2])\n      ip0 = (input[(h-2-row)*w*4+col*4+0] \n                +input[(h-2-row)*w*4+col*4+1] \n                +input[(h-2-row)*w*4+col*4+2])\n      ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                +input[(h-2-row)*w*4+(col+1)*4+1] \n                +input[(h-2-row)*w*4+(col+1)*4+2])\n      if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = 0\n      col = w-1\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                +input[(h-1-row)*w*4+(col-1)*4+1] \n                +input[(h-1-row)*w*4+(col-1)*4+2])\n      ip0 = (input[(h-2-row)*w*4+col*4+0] \n                +input[(h-2-row)*w*4+col*4+1] \n                +input[(h-2-row)*w*4+col*4+2])\n      ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                +input[(h-2-row)*w*4+(col-1)*4+1] \n                +input[(h-2-row)*w*4+(col-1)*4+2])\n      if ((i00 != i0m) || (i00 != ip0) || (i00 != ipm)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = h-1\n      col = 0\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                +input[(h-1-row)*w*4+(col+1)*4+1] \n                +input[(h-1-row)*w*4+(col+1)*4+2])\n      im0 = (input[(h-row)*w*4+col*4+0] \n                +input[(h-row)*w*4+col*4+1] \n                +input[(h-row)*w*4+col*4+2])\n      imp = (input[(h-row)*w*4+(col+1)*4+0] \n                +input[(h-row)*w*4+(col+1)*4+1] \n                +input[(h-row)*w*4+(col+1)*4+2])\n      if ((i00 != i0p) || (i00 != im0) || (i00 != imp)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = h-1\n      col = w-1\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                +input[(h-1-row)*w*4+(col-1)*4+1] \n                +input[(h-1-row)*w*4+(col-1)*4+2])\n      im0 = (input[(h-row)*w*4+col*4+0] \n                +input[(h-row)*w*4+col*4+1] \n                +input[(h-row)*w*4+col*4+2])\n      imm = (input[(h-row)*w*4+(col-1)*4+0] \n                +input[(h-row)*w*4+(col-1)*4+1] \n                +input[(h-row)*w*4+(col-1)*4+2])\n      if ((i00 != i0m) || (i00 != im0) || (i00 != imm)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1826.6116476429258","left":"4447.813999470311","filename":"undefined","inputs":{},"outputs":{}},"0.8903773266711255":{"definition":"//\n// orient edges\n//    input is green:interior, blue:exterior, red:boundary\n//    output is red 128:north,64:south, green 128:east,64:west, blue 128:start,64:stop\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'orient edges'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         var ctx = mod.display.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         orient_edges()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // off-screen display canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.display = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('red:north, dark red:south'))\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('green:east, dark green:west'))\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('blue:start, dark blue:stop'))\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.display,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// orient edges\n//\nfunction orient_edges() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      var disp = new Uint8ClampedArray(evt.data.display)\n      var dispdata = new ImageData(disp,w,h)\n      var ctx = mod.display.getContext(\"2d\")\n      ctx.putImageData(dispdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var w = mod.canvas.width\n      var h = mod.canvas.height\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,w,h)\n      ctx.drawImage(mod.display,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,\n      buffer:mod.input.data.buffer},\n      [mod.input.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Uint8ClampedArray(h*w*4)\n      var row,col\n      var boundary = 0\n      var interior = 1\n      var exterior = 2\n      var alpha = 3\n      var northsouth = 0\n      var north = 128\n      var south = 64\n      var eastwest = 1\n      var east = 128\n      var west = 64\n      var startstop = 2\n      var start = 128\n      var stop = 64\n      //\n      // orient body states\n      //\n      for (row = 1; row < (h-1); ++row) {\n         for (col = 1; col < (w-1); ++col) {\n            output[(h-1-row)*w*4+col*4+northsouth] = 0\n            output[(h-1-row)*w*4+col*4+eastwest] = 0\n            output[(h-1-row)*w*4+col*4+startstop] = 0\n            output[(h-1-row)*w*4+col*4+alpha] = 255\n            if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n               if ((input[(h-1-(row+1))*w*4+(col)*4+boundary] != 0)\n                  && ((input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)\n                  || (input[(h-1-(row+1))*w*4+(col+1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+northsouth] |= north\n               if ((input[(h-1-(row-1))*w*4+(col)*4+boundary] != 0)\n                  && ((input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)\n                  || (input[(h-1-(row-1))*w*4+(col-1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+northsouth] |= south\n               if ((input[(h-1-(row))*w*4+(col+1)*4+boundary] != 0)\n                  && ((input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)\n                  || (input[(h-1-(row-1))*w*4+(col+1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+eastwest] |= east\n               if ((input[(h-1-(row))*w*4+(col-1)*4+boundary] != 0)\n                  && ((input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)\n                  || (input[(h-1-(row+1))*w*4+(col-1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+eastwest] |= west\n               }\n            }\n         }\n      //\n      // orient edge states\n      //\n      for (col = 1; col < (w-1); ++col) {\n         row = 0\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if ((input[(h-1-(row+1))*w*4+(col)*4+boundary] != 0)\n               && (input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+northsouth] |= north\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            if (input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            }\n         row = h-1\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if (input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            if ((input[(h-1-(row-1))*w*4+(col)*4+boundary] != 0)\n               && (input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+northsouth] |= south\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            }\n         }\n      for (row = 1; row < (h-1); ++row) {\n         col = 0\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if ((input[(h-1-(row))*w*4+(col+1)*4+boundary] != 0)\n               && (input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+eastwest] |= east\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            if (input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            }\n         col = w-1\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if (input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            if ((input[(h-1-(row))*w*4+(col-1)*4+boundary] != 0)\n               && (input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+eastwest] |= west\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            }\n         }\n      //\n      // orient corner states (todo)\n      //\n      row = 0\n      col = 0\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = h-1\n      col = 0\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = 0\n      col = w-1\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = h-1\n      col = w-1\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      //\n      // invert background for display\n      //\n      var display = new Uint8ClampedArray(h*w*4)\n      var r,g,b,i\n      for (row = 0; row < h; ++row) {\n         for (col = 0; col < w; ++col) {\n            r = output[(h-1-row)*w*4+col*4+0]\n            g = output[(h-1-row)*w*4+col*4+1]\n            b = output[(h-1-row)*w*4+col*4+2]\n            i = r+g+b\n            if (i != 0) {            \n               display[(h-1-row)*w*4+col*4+0] = output[(h-1-row)*w*4+col*4+0]\n               display[(h-1-row)*w*4+col*4+1] = output[(h-1-row)*w*4+col*4+1]\n               display[(h-1-row)*w*4+col*4+2] = output[(h-1-row)*w*4+col*4+2]\n               display[(h-1-row)*w*4+col*4+3] = output[(h-1-row)*w*4+col*4+3]\n               }\n            else {\n               display[(h-1-row)*w*4+col*4+0] = 255\n               display[(h-1-row)*w*4+col*4+1] = 255\n               display[(h-1-row)*w*4+col*4+2] = 255\n               display[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      //\n      // return output\n      //\n      self.postMessage({buffer:output.buffer,display:display.buffer},[output.buffer,display.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1696.611647642926","left":"4016.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.3135579179893032":{"definition":"//\n// distance transform \n//    assumes thresholded image, with zero intensity exterior\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'offset'\n//\n// initialization\n//\nvar init = function() {\n   mod.offset.value = ''\n   }\n//\n// inputs\n//\nvar inputs = {\n   distances:{type:'F32',\n      event:function(evt){\n         mod.distances = evt.detail\n         var h = mod.distances.height\n         var w = mod.distances.width\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.height = mod.distances.height \n         ctx.canvas.width = mod.distances.width\n         if (mod.offset.value != '')\n            offset()\n         }},\n   offset:{type:'number',\n      event:function(evt){\n         mod.offset.value = evt.detail\n         offset()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // offset value\n   //\n   div.appendChild(document.createTextNode('offset (pixels): '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         offset()\n         })\n      div.appendChild(input)\n      mod.offset = input\n   //\n   // view button\n   //\n   div.appendChild(document.createElement('br'))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// offset\n//\nfunction offset() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.distances.height\n      var w = mod.distances.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var offset = parseFloat(mod.offset.value)\n   webworker.postMessage({\n      height:mod.distances.height,width:mod.distances.width,\n      offset:offset,buffer:mod.distances.buffer})\n   }\n//\n// offset worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var offset = evt.data.offset\n      var input = new Float32Array(evt.data.buffer)\n      var output = new Uint8ClampedArray(4*h*w)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            if (input[(h-1-row)*w+col] <= offset) {\n               output[(h-1-row)*w*4+col*4+0] = 255\n               output[(h-1-row)*w*4+col*4+1] = 255\n               output[(h-1-row)*w*4+col*4+2] = 255\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1309.611647642926","left":"4448.813999470311","filename":"undefined","inputs":{},"outputs":{}},"0.08127540142793499":{"definition":"//\n// read png\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'read png'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   }\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}},\n   imageInfo:{type:'object',\n      event:function(){\n         var obj = {}\n         obj.name = mod.name.nodeValue\n         obj.dpi = parseFloat(mod.dpitext.value)\n         obj.width = mod.img.width\n         obj.height = mod.img.height\n         mods.output(mod,'imageInfo',obj)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // file input control\n   //\n   var file = document.createElement('input')\n      file.setAttribute('type','file')\n      file.setAttribute('id',div.id+'file_input')\n      file.style.position = 'absolute'\n      file.style.left = 0\n      file.style.top = 0\n      file.style.width = 0\n      file.style.height = 0\n      file.style.opacity = 0\n      file.addEventListener('change',function() {\n         png_read_handler()\n         })\n      div.appendChild(file)\n      mod.file = file\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // file select button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('select png file'))\n      btn.addEventListener('click',function(){\n         var file = document.getElementById(div.id+'file_input')\n         file.value = null\n         file.click()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createTextNode(' '))\n   //\n   // invert button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('invert'))\n      btn.addEventListener('click',function(){\n         invert_image()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // info div\n   //\n   var info = document.createElement('div')\n      info.setAttribute('id',div.id+'info')\n      info.appendChild(document.createTextNode('dpi: '))\n      var input = document.createElement('input')\n         input.type = 'text'\n         input.size = 6\n         input.addEventListener('input',function(){\n            mod.dpi = parseFloat(mod.dpitext.value)\n            mod.mmtext.nodeValue = (25.4*mod.img.width/mod.dpi).toFixed(3)\n               +' x '+(25.4*mod.img.height/mod.dpi).toFixed(3)+' mm'\n            mod.intext.nodeValue = (mod.img.width/mod.dpi).toFixed(3)\n               +' x '+(mod.img.height/mod.dpi).toFixed(3)+' in'\n            outputs.imageInfo.event()\n            })\n         info.appendChild(input)\n         mod.dpitext = input\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('px: ')\n         info.appendChild(text)\n         mod.pxtext = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('mm: ')\n         info.appendChild(text)\n         mod.mmtext = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('in: ')\n         info.appendChild(text)\n         mod.intext = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('')\n         info.appendChild(text)\n         mod.name = text\n      div.appendChild(info)\n   }\n//\n// local functions\n//\n// read handler\n//\nfunction png_read_handler(event) {\n   var file_reader = new FileReader()\n   file_reader.onload = png_binary_handler\n   input_file = mod.file.files[0]\n   file_name = input_file.name\n   mod.name.nodeValue = file_name\n   file_reader.readAsArrayBuffer(input_file)\n   }\n//\n// binary load handler\n//\nfunction png_binary_handler(event) {\n   //\n   // get DPI\n   //\n   // 8 header\n   // 4 len, 4 type, data, 4 crc\n   // pHYs 4 ppx, 4 ppy, 1 unit: 0 ?, 1 meter\n   // IEND\n   //\n   var units = ppx = ppy = 0\n   var buf = event.target.result\n   var view = new DataView(buf)\n   var ptr = 8\n   if (!((view.getUint8(1) == 80) && (view.getUint8(2) == 78) && (view.getUint8(3) == 71))) {\n      set_prompt(\"error: PNG header not found\")\n      return\n      }\n   while (1) {\n      var length = view.getUint32(ptr)\n      ptr += 4\n      var type = String.fromCharCode(\n         view.getUint8(ptr),view.getUint8(ptr+1),\n         view.getUint8(ptr+2),view.getUint8(ptr+3))\n      ptr += 4\n      if (type == \"pHYs\") {\n         ppx = view.getUint32(ptr)\n         ppy = view.getUint32(ptr + 4)\n         units = view.getUint8(ptr + 8)\n         }\n      if (type == \"IEND\")\n         break\n      ptr += length + 4\n      }\n   if (units == 0) {\n      set_prompt(\"no PNG units not found, assuming 72 DPI\")\n      ppx = 72*1000/25.4\n      }\n   dpi = ppx*25.4/1000\n   //\n   // read as URL for display\n   //\n   var file_reader = new FileReader()\n   file_reader.onload = png_URL_handler\n   file_reader.readAsDataURL(input_file)\n   }\n//\n// URL load handler\n//\nfunction png_URL_handler(event) {\n   var img = new Image()\n   img.setAttribute(\"src\",event.target.result)\n   img.onload = function() {\n      if (img.width > img.height) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-img.height/img.width)\n         var w = mod.canvas.width\n         var h = mod.canvas.width*img.height/img.width\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-img.width/img.height)\n         var y0 = 0\n         var w = mod.canvas.height*img.width/img.height\n         var h = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n         ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n         ctx.drawImage(img,x0,y0,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = img.width\n         ctx.canvas.height = img.height \n         ctx.drawImage(img,0,0)\n      mod.dpitext.value = dpi.toFixed(3)\n      mod.pxtext.nodeValue = img.width+' x '+img.height+' px'\n      mod.mmtext.nodeValue = (25.4*img.width/dpi).toFixed(3)\n         +' x '+(25.4*img.height/dpi).toFixed(3)+' mm'\n      mod.intext.nodeValue = (img.width/dpi).toFixed(3)\n         +' x '+(img.height/dpi).toFixed(3)+' in'\n      outputs.image.event()\n      outputs.imageInfo.event()\n      }\n   }\n//\n// invert image\n//\nfunction invert_image() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var h = mod.img.height\n   var w = mod.img.width\n   var ctx = mod.img.getContext(\"2d\")\n   var img = ctx.getImageData(0,0,w,h)\n   webworker.postMessage({\n      height:img.height,width:img.width,buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            buf[(h-1-row)*w*4+col*4+0] \n               = 255-buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+1] \n               = 255-buf[(h-1-row)*w*4+col*4+1] \n            buf[(h-1-row)*w*4+col*4+2] \n               = 255-buf[(h-1-row)*w*4+col*4+2] \n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1151.611647642926","left":"1834.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.6488303557466412":{"definition":"//\n// image threshold\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'image threshold'\n//\n// initialization\n//\nvar init = function() {\n   mod.threshold.value = 0.5\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         threshold_image()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // threshold value\n   //\n   div.appendChild(document.createTextNode('threshold (0-1): '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         threshold_image()\n         })\n      div.appendChild(input)\n      mod.threshold = input\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// threshold image\n//\nfunction threshold_image() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var t = parseFloat(mod.threshold.value)\n   var ctx = mod.img.getContext(\"2d\")\n   ctx.putImageData(mod.input,0,0)\n   var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,threshold:t,\n      buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var t = evt.data.threshold\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var r,g,b,a,i\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            r = buf[(h-1-row)*w*4+col*4+0] \n            g = buf[(h-1-row)*w*4+col*4+1] \n            b = buf[(h-1-row)*w*4+col*4+2] \n            a = buf[(h-1-row)*w*4+col*4+3] \n            i = (r+g+b)/(3*255)\n            if (a == 0)\n               val = 255\n            else if (i > t)\n               var val = 255\n            else\n               var val = 0\n            buf[(h-1-row)*w*4+col*4+0] = val\n            buf[(h-1-row)*w*4+col*4+1] = val\n            buf[(h-1-row)*w*4+col*4+2] = val\n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1342.611647642926","left":"3477.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.2892270043957246":{"definition":"//\n// view toolpath\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// todo:\n//    erase and update new path\n//    show depth info\n//    show size\n//    calculate camera far\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'view toolpath'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   toolpath:{type:'object',\n      event:function(evt){\n         mod.path = evt.detail.path\n         mod.name = evt.detail.name\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         mod.depth = evt.detail.depth\n         show_path_info()\n         show_path()\n         outputs.toolpath.event()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   toolpath:{type:'object',\n      event:function(){\n         cmd = {}\n         cmd.path = mod.path\n         cmd.name = mod.name\n         cmd.dpi = mod.dpi\n         cmd.width = mod.width\n         cmd.height = mod.height\n         mods.output(mod,'toolpath',cmd)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // info\n   //\n   var text = document.createTextNode('name: ')\n      div.appendChild(text)\n      mod.nametext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(mm)')\n      div.appendChild(text)\n      mod.mmtext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(in)')\n      div.appendChild(text)\n      mod.intext = text\n   //\n   // view\n   //   \n   div.appendChild(document.createElement('br'))   \n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n         var text = document.createTextNode('view')\n            span.appendChild(text)\n         btn.appendChild(span)\n      btn.addEventListener('click',function(){\n         open_view_window()\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// show_path_info\n//\nfunction show_path_info() {\n   mod.nametext.nodeValue = 'name: '+mod.name\n   var width = (25.4*mod.width/mod.dpi).toFixed(3)\n   var height = (25.4*mod.height/mod.dpi).toFixed(3)\n   var depth = (25.4*mod.depth/mod.dpi).toFixed(3)\n   if (mod.depth == undefined)\n      mod.mmtext.nodeValue = width+' x '+height+' (mm)'\n   else\n      mod.mmtext.nodeValue = width+' x '+height+' x '+depth+' (mm)'\n   var width = (mod.width/mod.dpi).toFixed(3)\n   var height = (mod.height/mod.dpi).toFixed(3)\n   var depth = (mod.depth/mod.dpi).toFixed(3)\n   if (mod.depth == undefined)\n      mod.intext.nodeValue = width+' x '+height+' (in)'\n   else\n      mod.intext.nodeValue = width+' x '+height+' x '+depth+' (in)'\n   mods.fit(mod.div)\n   }\n//\n// show_path\n//\nfunction show_path() {\n   var scene = mod.scene\n   var camera = mod.camera\n   var renderer = mod.renderer\n   //\n   // check if view window open\n   //\n   if (mod.win == undefined) {\n      open_view_window()\n      return\n      }\n   //\n   // check for path\n   //\n   if (mod.path == undefined)\n      return\n   //\n   // clear scene, leave camera\n   //\n   var length = scene.children.length\n   for (var c = (length-1); c > 1; --c) {\n      scene.remove(scene.children[c])\n      }\n   //\n   // fit camera\n   //\n   mod.thetaxy = 0\n   mod.thetaz = 0\n   mod.r = mod.height/2\n   mod.x0 = mod.width/2\n   mod.y0 = mod.height/2\n   camera.position.set(mod.x0,mod.y0,mod.r)\n   camera.up = new THREE.Vector3(0,1,0)\n   camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n   camera.updateProjectionMatrix()\n   //\n   // draw segments\n   //\n   var arrow_size = 1+mod.width/200\n   var path = mod.path\n   for (var segment = 0; segment < path.length; ++segment) {\n      if (segment > 0)\n         add_arrow(path[segment-1][path[segment-1].length-1],path[segment][0],0xff0000,arrow_size)         \n      for (var point = 1; point < path[segment].length; ++point) {\n         add_arrow(path[segment][point-1],path[segment][point],0x0000ff,arrow_size)\n         }\n      }\n   //\n   // add axes\n   //\n   var length = mod.height/10\n   add_arrow([0,0,0],[length,0,0],0xff0000,arrow_size)\n   add_arrow([0,0,0],[0,length,0],0x00ff00,arrow_size)\n   add_arrow([0,0,0],[0,0,length],0x0000ff,arrow_size)\n   //\n   // render\n   //\n   update()\n   //\n   // add_arrow\n   //\n   function add_arrow(start,stop,color,size) {\n      var origin = new THREE.Vector3().fromArray(start)\n      if (mod.depth == undefined)\n         origin.z = 0\n      var end  = new THREE.Vector3().fromArray(stop)\n      if (mod.depth == undefined)\n         end.z = 0\n      var length = new THREE.Vector3().subVectors(end,origin).length()\n      if (length <= size) {\n         add_line(origin,end,color)\n         //length = 1.1*size\n         return\n         }\n      var direction = new THREE.Vector3().subVectors(end,origin).normalize()\n      var arrow = new THREE.ArrowHelper(direction,origin,length,color,size,size)\n      scene.add(arrow)\n      }\n   //\n   // add_line\n   //\n   function add_line(start,stop,colorhex) {\n      var geometry = new THREE.Geometry()\n      geometry.vertices.push(start,stop)\n      var material = new THREE.LineBasicMaterial({color:colorhex})\n      var line = new THREE.Line(geometry,material)\n      scene.add(line)\n      }\n   //\n   // update\n   //\n   function update() {\n\t   renderer.render(scene,camera)\n      }\n   }\n//\n// open_view_window\n//\nfunction open_view_window() {\n   //\n   // globals\n   //\n   var container,scene,camera,renderer,win,controls\n   //\n   // open the window\n   //\n   open_window()\n   //\n   // open_window\n   //\n   function open_window() {\n      //\n      // open window\n      //\n      win = window.open('')\n      mod.win = win\n      //\n      // load three.js\n      //\n      var script = document.createElement('script')\n      script.type = 'text/javascript'\n      script.onload = init_window\n      script.src = 'js/three.js/three.min.js'\n      mod.div.appendChild(script)\n      }\n   //\n   // init_window\n   //\n   function init_window() {\n      //\n      // close button\n      //\n      var btn = document.createElement('button')\n         btn.appendChild(document.createTextNode('close'))\n         btn.style.padding = mods.ui.padding\n         btn.style.margin = 1\n         btn.addEventListener('click',function(){\n            win.close()\n            mod.win = undefined\n            })\n         win.document.body.appendChild(btn)\n      //\n      // label text\n      //\n      var text = win.document.createTextNode(' left: pan, right: rotate, scroll: zoom')\n         win.document.body.appendChild(text)\n      //\n      // GL container\n      //\n      win.document.body.appendChild(document.createElement('br'))   \n      container = win.document.createElement('div')\n      container.style.overflow = 'hidden'\n      win.document.body.appendChild(container)\n      //\n      // event handlers\n      //\n      container.addEventListener('contextmenu',context_menu)\n      container.addEventListener('mousedown',mouse_down)\n      container.addEventListener('mouseup',mouse_up)\n      container.addEventListener('mousemove',mouse_move)\n      container.addEventListener('wheel',mouse_wheel)\n      //\n      // add scene\n      //\n\t   scene = new THREE.Scene()\n\t   mod.scene = scene\n\t   var width = win.innerWidth\n\t   var height = win.innerHeight\n\t   var aspect = width/height\n\t   var near = 0.1\n\t   var far = 1000000\n\t   camera = new THREE.PerspectiveCamera(90,aspect,near,far)\n\t   mod.camera = camera\n\t   scene.add(camera)\n\t   //\n\t   // add renderer\n\t   //\n      renderer = new THREE.WebGLRenderer({antialias:true})\n      mod.renderer = renderer\n      renderer.setClearColor(0xffffff)\n\t   renderer.setSize(width,height)\n\t   container.appendChild(renderer.domElement)\n      //\n      // show the path if available\n      //\n      show_path()\n      }\n   //\n   // context_menu\n   //\n   function context_menu(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      return (false)\n      }\n   //\n   // mouse_down\n   //\n   function mouse_down(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      mod.button = evt.button\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      }\n   //\n   // mouse_up\n   //\n   function mouse_up(evt) {\n      mod.button = undefined\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      }\n   //\n   // mouse_move\n   //\n   function mouse_move(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      var dx = evt.clientX-mod.x\n      var dy = evt.clientY-mod.y\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      if (mod.button == 0) {\n         mod.x0 += \n            Math.sin(mod.thetaz)*mod.height*dy/win.innerHeight\n            -Math.cos(mod.thetaz)*mod.width*dx/win.innerWidth\n         mod.y0 += \n            Math.cos(mod.thetaz)*mod.height*dy/win.innerHeight\n            +Math.sin(mod.thetaz)*mod.width*dx/win.innerWidth\n         camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t      camera.up = new THREE.Vector3(Math.sin(mod.thetaz),Math.cos(mod.thetaz),0)\n\t      camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n         camera.updateProjectionMatrix()\n\t      renderer.render(scene,camera)\n\t      }\n      else if (mod.button == 2) {\n         mod.thetaxy += dy/win.innerHeight\n         mod.thetaz += dx/win.innerWidth\n         camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t      camera.up = new THREE.Vector3(Math.sin(mod.thetaz),Math.cos(mod.thetaz),0)\n\t      camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n         camera.updateProjectionMatrix()\n\t      renderer.render(scene,camera)\n\t      }\n      }\n   //\n   // mouse_wheel\n   //\n   function mouse_wheel(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      var dy = evt.deltaY/win.innerHeight\n      mod.r += mod.height*dy\n      camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n      camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n      camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t   camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n      camera.updateProjectionMatrix()\n\t   renderer.render(scene,camera)\n      }\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"2046.6116476429258","left":"2807.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.9557599338778935":{"definition":"//\n// mill raster 2D\n//\n// Neil Gershenfeld\n// (c) Massachusetts Institute of Technology 2016\n//\n// This work may be reproduced, modified, distributed, performed, and\n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is\n// provided as is; no warranty is provided, and users accept all\n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'mill raster 2D'\n//\n// initialization\n//\nvar init = function() {\n   mod.dia_in.value = 0.0156\n   mod.dia_mm.value = 25.4*parseFloat(mod.dia_in.value)\n   mod.cut_in.value = 0.004\n   mod.cut_mm.value = 25.4*parseFloat(mod.cut_in.value)\n   mod.max_in.value = 0.004\n   mod.max_mm.value = 25.4*parseFloat(mod.max_in.value)\n   mod.number.value = 4\n   mod.stepover.value = 0.5\n   mod.merge.value = 1\n   mod.sort.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   imageInfo:{type:'object',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.width\n         ctx.canvas.height = mod.height\n         }},\n   path:{type:'array',\n      event:function(evt){\n         if (mod.label.nodeValue == 'calculating') {\n            draw_path(evt.detail)\n            accumulate_path(evt.detail)\n            mod.offsetCount += 1\n            if ((mod.offsetCount != parseInt(mod.number.value)) && (evt.detail.length > 0)) {\n               mod.offset += parseFloat(mod.stepover.value)\n               outputs.offset.event()\n               }\n            else {\n               mod.label.nodeValue = 'calculate'\n               mod.labelspan.style.fontWeight = 'normal'\n               merge_path()\n               clear_path()\n               draw_path(mod.path)\n               draw_connections()\n               add_depth()\n               outputs.toolpath.event()\n               }\n            }\n         }\n      },\n   settings:{type:'object',\n      event:function(evt){\n         set_values(evt.detail)\n         }\n      }\n   }\n//\n// outputs\n//\nvar outputs = {\n   diameter:{type:'number',\n      event:function(){\n         mods.output(mod,'diameter',Math.ceil(mod.dpi*mod.dia_in.value))\n         }\n      },\n   offset:{type:'number',\n      event:function(){\n         var pixels = mod.offset*parseFloat(mod.dia_in.value)*mod.dpi\n         mods.output(mod,'offset',pixels)\n         }\n      },\n   toolpath:{type:'object',\n      event:function(){\n         cmd = {}\n         cmd.path = mod.path\n         cmd.name = mod.name\n         cmd.dpi = mod.dpi\n         cmd.width = mod.width\n         cmd.height = mod.height\n         cmd.depth = mod.depth\n         mods.output(mod,'toolpath',cmd)\n         }\n      }\n   }\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // tool diameter\n   //\n   div.appendChild(document.createTextNode('tool diameter'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.dia_in.value = parseFloat(mod.dia_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.dia_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.dia_mm.value = parseFloat(mod.dia_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.dia_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // cut depth\n   //\n   div.appendChild(document.createTextNode('cut depth'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.cut_in.value = parseFloat(mod.cut_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.cut_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.cut_mm.value = parseFloat(mod.cut_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.cut_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // max depth\n   //\n   div.appendChild(document.createTextNode('max depth'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.max_in.value = parseFloat(mod.max_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.max_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.max_mm.value = parseFloat(mod.max_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.max_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // offset number\n   //\n   div.appendChild(document.createTextNode('offset number: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.number = input\n   div.appendChild(document.createTextNode(' (0 = fill)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // offset stepover\n   //\n   div.appendChild(document.createTextNode('offset stepover: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.stepover = input\n   div.appendChild(document.createTextNode(' (1 = diameter)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // direction\n   //\n   div.appendChild(document.createTextNode('direction: '))\n   div.appendChild(document.createTextNode('climb'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'direction'\n      input.id = mod.div.id+'climb'\n      input.checked = true\n      div.appendChild(input)\n      mod.climb = input\n   div.appendChild(document.createTextNode(' conventional'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'direction'\n      input.id = mod.div.id+'conventional'\n      div.appendChild(input)\n      mod.conventional = input\n   div.appendChild(document.createElement('br'))\n   //\n   // path merge\n   //\n   div.appendChild(document.createTextNode('path merge: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.merge = input\n   div.appendChild(document.createTextNode(' (1 = diameter)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // path order\n   //\n   div.appendChild(document.createTextNode('path order: '))\n   div.appendChild(document.createTextNode('forward'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'order'\n      input.id = mod.div.id+'forward'\n      input.checked = true\n      div.appendChild(input)\n      mod.forward = input\n   div.appendChild(document.createTextNode(' reverse'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'order'\n      input.id = mod.div.id+'reverse'\n      div.appendChild(input)\n      mod.reverse = input\n   div.appendChild(document.createElement('br'))\n   //\n   // sort distance\n   //\n   div.appendChild(document.createTextNode('sort distance: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.id = mod.div.id+'sort'\n      div.appendChild(input)\n      mod.sort = input\n   div.appendChild(document.createElement('br'))\n   //\n   // calculate\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n         var text = document.createTextNode('calculate')\n            mod.label = text\n            span.appendChild(text)\n         mod.labelspan = span\n         btn.appendChild(span)\n      btn.addEventListener('click',function(){\n         mod.label.nodeValue = 'calculating'\n         mod.labelspan.style.fontWeight = 'bold'\n         mod.offset = 0.5\n         mod.offsetCount = 0\n         mod.path = []\n         clear_path()\n         outputs.diameter.event()\n         outputs.offset.event()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createTextNode(' '))\n   //\n   // view\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var svg = document.getElementById(mod.div.id+'svg')\n         var clone = svg.cloneNode(true)\n         clone.setAttribute('width',mod.img.width)\n         clone.setAttribute('height',mod.img.height)\n         win.document.body.appendChild(clone)\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // on-screen SVG\n   //\n   var svgNS = \"http://www.w3.org/2000/svg\"\n   var svg = document.createElementNS(svgNS,\"svg\")\n   svg.setAttribute('id',mod.div.id+'svg')\n   svg.setAttributeNS(\"http://www.w3.org/2000/xmlns/\",\n      \"xmlns:xlink\",\"http://www.w3.org/1999/xlink\")\n   svg.setAttribute('width',mods.ui.canvas)\n   svg.setAttribute('height',mods.ui.canvas)\n   svg.style.backgroundColor = 'rgb(255,255,255)'\n   var g = document.createElementNS(svgNS,'g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   div.appendChild(svg)\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   }\n//\n// local functions\n//\n// set_values\n//\nfunction set_values(settings) {\n   for (var s in settings) {\n      switch(s) {\n         case 'tool diameter (in)':\n            mod.dia_in.value = settings[s]\n            mod.dia_mm.value = parseFloat(mod.dia_in.value)*25.4\n            break\n         case 'cut depth (in)':\n            mod.cut_in.value = settings[s]\n            mod.cut_mm.value = parseFloat(mod.cut_in.value)*25.4\n            break\n         case 'max depth (in)':\n            mod.max_in.value = settings[s]\n            mod.max_mm.value = parseFloat(mod.max_in.value)*25.4\n            break\n         case 'offset number':\n            mod.number.value = settings[s]\n            break\n         }\n      }\n   }\n//\n// clear_path\n//\nfunction clear_path() {\n   var svg = document.getElementById(mod.div.id+'svg')\n   svg.setAttribute('viewBox',\"0 0 \"+(mod.img.width-1)+\" \"+(mod.img.height-1))\n   var g = document.getElementById(mod.div.id+'g')\n   svg.removeChild(g)\n   var g = document.createElementNS('http://www.w3.org/2000/svg','g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   }\n//\n// accumulate_path\n//    todo: replace inefficient insertion sort\n//    todo: move sort out of main thread\n//\nfunction accumulate_path(path) {\n   var forward = mod.forward.checked\n   var conventional = mod.conventional.checked\n   var sort = mod.sort.checked\n   for (var segnew = 0; segnew < path.length; ++segnew) {\n      if (conventional)\n         path[segnew].reverse()\n      if (mod.path.length == 0)\n         mod.path.splice(0,0,path[segnew])\n      else if (sort) {\n         var xnew = path[segnew][0][0]\n         var ynew = path[segnew][0][1]\n         var dmin = Number.MAX_VALUE\n         var segmin = -1\n         for (var segold = 0; segold < mod.path.length; ++segold) {\n            var xold = mod.path[segold][0][0]\n            var yold = mod.path[segold][0][1]\n            var dx = xnew-xold\n            var dy = ynew-yold\n            var d = Math.sqrt(dx*dx+dy*dy)\n            if (d < dmin) {\n               dmin = d\n               segmin = segold\n               }\n            }\n         if (forward)\n            mod.path.splice(segmin+1,0,path[segnew])\n         else\n            mod.path.splice(segmin,0,path[segnew])\n         }\n      else {\n         if (forward)\n            mod.path.splice(mod.path.length,0,path[segnew])\n         else\n            mod.path.splice(0,0,path[segnew])\n         }\n      }\n   }\n//\n// merge_path\n//\nfunction merge_path() {\n   var dmerge = mod.dpi*parseFloat(mod.merge.value)*parseFloat(mod.dia_in.value)\n   var seg = 0\n   while (seg < (mod.path.length-1)) {\n      var xold = mod.path[seg][mod.path[seg].length-1][0]\n      var yold = mod.path[seg][mod.path[seg].length-1][1]\n      var xnew = mod.path[seg+1][0][0]\n      var ynew = mod.path[seg+1][0][1]\n      var dx = xnew-xold\n      var dy = ynew-yold\n      var d = Math.sqrt(dx*dx+dy*dy)\n      if (d < dmerge)\n         mod.path.splice(seg,2,mod.path[seg].concat(mod.path[seg+1]))\n      else\n         seg += 1\n      }\n   }\n//\n// add_depth\n//\nfunction add_depth() {\n   var cut = parseFloat(mod.cut_in.value)\n   var max = parseFloat(mod.max_in.value)\n   var newpath = []\n   for (var seg = 0; seg < mod.path.length; ++seg) {\n      var depth = cut\n      if ((mod.path[seg][0][0] == mod.path[seg][mod.path[seg].length-1][0])\n         && (mod.path[seg][0][0] == mod.path[seg][mod.path[seg].length-1][0])) {\n         var newseg = []\n         while (depth <= max) {\n            var idepth = -Math.round(mod.dpi*depth)\n            for (var pt = 0; pt < mod.path[seg].length; ++pt) {\n               var point = mod.path[seg][pt].concat(idepth)\n               newseg.splice(newseg.length,0,point)\n               }\n            if (depth == max)\n               break\n            depth += cut\n            if (depth > max)\n               depth = max\n            }\n         newpath.splice(newpath.length,0,newseg)\n         }\n      else {\n         var newseg = []\n         while (depth <= max) {\n            var idepth = -Math.round(mod.dpi*depth)\n            for (var pt = 0; pt < mod.path[seg].length; ++pt) {\n               var point = mod.path[seg][pt].concat(idepth)\n               newseg.splice(newseg.length,0,point)\n               }\n            newpath.splice(newpath.length,0,newseg)\n            newseg = []\n            if (depth == max)\n               break\n            depth += cut\n            if (depth > max)\n               depth = max\n            }\n         }\n      }\n   mod.path = newpath\n   mod.depth = Math.round(parseFloat(mod.max_in.value)*mod.dpi)\n   }\n//\n// draw_path\n//\nfunction draw_path(path) {\n   var g = document.getElementById(mod.div.id+'g')\n   var h = mod.img.height\n   var w = mod.img.width\n   var xend = null\n   var yend = null\n   //\n   // loop over segments\n   //\n   for (var segment = 0; segment < path.length; ++segment) {\n      if (path[segment].length > 1) {\n         //\n         // loop over points\n         //\n         for (var point = 1; point < path[segment].length; ++point) {\n            var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n            line.setAttribute('stroke','black')\n            line.setAttribute('stroke-width',1)\n            line.setAttribute('stroke-linecap','round')\n            var x1 = path[segment][point-1][0]\n            var y1 = h-path[segment][point-1][1]-1\n            var x2 = path[segment][point][0]\n            var y2 = h-path[segment][point][1]-1\n            xend = x2\n            yend = y2\n            line.setAttribute('x1',x1)\n            line.setAttribute('y1',y1)\n            line.setAttribute('x2',x2)\n            line.setAttribute('y2',y2)\n            var dx = x2-x1\n            var dy = y2-y1\n            var d = Math.sqrt(dx*dx+dy*dy)\n            if (d > 0) {\n               nx = 6*dx/d\n               ny = 6*dy/d\n               var tx = 3*dy/d\n               var ty = -3*dx/d\n               g.appendChild(line)\n               triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n               triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                  +' '+(x2-nx-tx)+','+(y2-ny-ty))\n               triangle.setAttribute('fill','black')\n               g.appendChild(triangle)\n               }\n            }\n         }\n      }\n   }\n//\n// draw_connections\n//\nfunction draw_connections() {\n   var g = document.getElementById(mod.div.id+'g')\n   var h = mod.img.height\n   var w = mod.img.width\n   //\n   // loop over segments\n   //\n   for (var segment = 1; segment < mod.path.length; ++segment) {\n      //\n      // draw connection from previous segment\n      //\n      var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n      line.setAttribute('stroke','red')\n      line.setAttribute('stroke-width',1)\n      line.setAttribute('stroke-linecap','round')\n      var x1 = mod.path[segment-1][mod.path[segment-1].length-1][0]\n      var y1 = h-mod.path[segment-1][mod.path[segment-1].length-1][1]-1\n      var x2 = mod.path[segment][0][0]\n      var y2 = h-mod.path[segment][0][1]-1\n      line.setAttribute('x1',x1)\n      line.setAttribute('y1',y1)\n      line.setAttribute('x2',x2)\n      line.setAttribute('y2',y2)\n      var dx = x2-x1\n      var dy = y2-y1\n      var d = Math.sqrt(dx*dx+dy*dy)\n      if (d > 0) {\n         nx = 6*dx/d\n         ny = 6*dy/d\n         var tx = 3*dy/d\n         var ty = -3*dx/d\n         g.appendChild(line)\n         triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n         triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n            +' '+(x2-nx-tx)+','+(y2-ny-ty))\n         triangle.setAttribute('fill','red')\n         g.appendChild(triangle)\n         }\n      }\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n\n","top":"1267.611647642926","left":"2830.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.10309904694903338":{"definition":"//\n// vectorize\n//    input is red 128:north,64:south, green 128:east,64:west, blue 128:start,64:stop\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'vectorize'\n//\n// initialization\n//\nvar init = function() {\n   mod.error.value = 1\n   mod.sort.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         vectorize()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   path:{type:'array',\n      event:function(){\n         mods.output(mod,'path',mod.path)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen SVG\n   //\n   var svgNS = \"http://www.w3.org/2000/svg\"\n   var svg = document.createElementNS(svgNS,\"svg\")\n   svg.setAttribute('id',mod.div.id+'svg')\n   svg.setAttributeNS(\"http://www.w3.org/2000/xmlns/\",\n      \"xmlns:xlink\",\"http://www.w3.org/1999/xlink\")\n   svg.setAttribute('width',mods.ui.canvas)\n   svg.setAttribute('height',mods.ui.canvas)\n   svg.style.backgroundColor = 'rgb(255,255,255)'\n   var g = document.createElementNS(svgNS,'g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   div.appendChild(svg)\n   div.appendChild(document.createElement('br'))   \n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // error value\n   //\n   div.appendChild(document.createTextNode('vector fit (pixels): '))\n   //div.appendChild(document.createElement('br'))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         vectorize()\n         })\n      div.appendChild(input)\n      mod.error = input\n   div.appendChild(document.createElement('br'))\n   //\n   // sort\n   //\n   div.appendChild(document.createTextNode('sort distance: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.id = mod.div.id+'sort'\n      div.appendChild(input)\n      mod.sort = input\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var svg = document.getElementById(mod.div.id+'svg')\n         var clone = svg.cloneNode(true)\n         clone.setAttribute('width',mod.img.width)\n         clone.setAttribute('height',mod.img.height)\n         win.document.body.appendChild(clone)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// vectorize\n//\nfunction vectorize() {\n   //\n   // draw path\n   //\n   function draw_path(path) {\n      window.URL.revokeObjectURL(url)\n      var svg = document.getElementById(mod.div.id+'svg')\n      svg.setAttribute('viewBox',\"0 0 \"+(mod.img.width-1)+\" \"+(mod.img.height-1))\n      var g = document.getElementById(mod.div.id+'g')\n      svg.removeChild(g)\n      var g = document.createElementNS('http://www.w3.org/2000/svg','g')\n      g.setAttribute('id',mod.div.id+'g')\n      var h = mod.img.height\n      var w = mod.img.width\n      var xend = null\n      var yend = null\n      //\n      // loop over segments\n      //\n      for (var segment in path) {\n         if (path[segment].length > 1) {\n            if (xend != null) {\n               //\n               // draw connection from previous segment\n               //\n               var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n               line.setAttribute('stroke','red')\n               line.setAttribute('stroke-width',1)\n               line.setAttribute('stroke-linecap','round')\n               var x1 = xend\n               var y1 = yend\n               var x2 = path[segment][0][0]\n               var y2 = h-path[segment][0][1]-1\n               line.setAttribute('x1',x1)\n               line.setAttribute('y1',y1)\n               line.setAttribute('x2',x2)\n               line.setAttribute('y2',y2)\n               var dx = x2-x1\n               var dy = y2-y1\n               var d = Math.sqrt(dx*dx+dy*dy)\n               if (d > 0) {\n                  nx = 6*dx/d\n                  ny = 6*dy/d\n                  var tx = 3*dy/d\n                  var ty = -3*dx/d\n                  g.appendChild(line)\n                  triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n                  triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                     +' '+(x2-nx-tx)+','+(y2-ny-ty))\n                  triangle.setAttribute('fill','red')\n                  g.appendChild(triangle)\n                  }\n               }\n            //\n            // loop over points\n            //\n            for (var point = 1; point < path[segment].length; ++point) {\n               var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n               line.setAttribute('stroke','black')\n               line.setAttribute('stroke-width',1)\n               line.setAttribute('stroke-linecap','round')\n               var x1 = path[segment][point-1][0]\n               var y1 = h-path[segment][point-1][1]-1\n               var x2 = path[segment][point][0]\n               var y2 = h-path[segment][point][1]-1\n               xend = x2\n               yend = y2\n               line.setAttribute('x1',x1)\n               line.setAttribute('y1',y1)\n               line.setAttribute('x2',x2)\n               line.setAttribute('y2',y2)\n               var dx = x2-x1\n               var dy = y2-y1\n               var d = Math.sqrt(dx*dx+dy*dy)\n               if (d > 0) {\n                  nx = 6*dx/d\n                  ny = 6*dy/d\n                  var tx = 3*dy/d\n                  var ty = -3*dx/d\n                  g.appendChild(line)\n                  triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n                  triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                     +' '+(x2-nx-tx)+','+(y2-ny-ty))\n                  triangle.setAttribute('fill','black')\n                  g.appendChild(triangle)\n                  }\n               }\n            }\n         }\n      svg.appendChild(g)\n      }\n   //\n   // set up worker\n   //\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      webworker.terminate()\n      mod.path = evt.data.path\n      draw_path(mod.path)\n      outputs.path.event()\n      })\n   //\n   // call worker\n   //\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,sort:mod.sort.checked,\n      error:parseFloat(mod.error.value),\n      buffer:mod.input.data.buffer})\n   }\n//\n// vectorize worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var sort = evt.data.sort\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var northsouth = 0\n      var north = 128\n      var south = 64\n      var eastwest = 1\n      var east = 128\n      var west = 64\n      var startstop = 2\n      var start = 128\n      var stop = 64\n      var path = []\n      //\n      // edge follower\n      //\n      function follow_edges(row,col) {\n         if ((input[(h-1-row)*w*4+col*4+northsouth] != 0)\n            || (input[(h-1-row)*w*4+col*4+eastwest] != 0)) {\n            path[path.length] = [[col,row]]\n            while (1) {\n               if (input[(h-1-row)*w*4+col*4+northsouth] & north) {\n                  input[(h-1-row)*w*4+col*4+northsouth] =\n                     input[(h-1-row)*w*4+col*4+northsouth] & ~north\n                  row += 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+northsouth] & south) {\n                  input[(h-1-row)*w*4+col*4+northsouth] =\n                     input[(h-1-row)*w*4+col*4+northsouth] & ~south\n                  row -= 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+eastwest] & east) {\n                  input[(h-1-row)*w*4+col*4+eastwest] =\n                     input[(h-1-row)*w*4+col*4+eastwest] & ~east\n                  col += 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+eastwest] & west) {\n                  input[(h-1-row)*w*4+col*4+eastwest] =\n                     input[(h-1-row)*w*4+col*4+eastwest] & ~west\n                  col -= 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else\n                  break\n               }\n            }\n         }\n      //\n      // follow boundary starts\n      //\n      for (var row = 1; row < (h-1); ++row) {\n         col = 0\n         follow_edges(row,col)\n         col = w-1\n         follow_edges(row,col)\n         }\n      for (var col = 1; col < (w-1); ++col) {\n         row = 0\n         follow_edges(row,col)\n         row = h-1      \n         follow_edges(row,col)\n         }\n      //\n      // follow interior paths\n      //\n      for (var row = 1; row < (h-1); ++row) {\n         for (var col = 1; col < (w-1); ++col) {\n            follow_edges(row,col)\n            }\n         }\n      //\n      // vectorize path\n      //\n      var error = evt.data.error\n      var vecpath = []\n      for (var seg = 0; seg < path.length; ++seg) {\n         var x0 = path[seg][0][0]\n         var y0 = path[seg][0][1]\n         vecpath[vecpath.length] = [[x0,y0]]\n         var xsum = x0\n         var ysum = y0\n         var sum = 1\n         for (var pt = 1; pt < path[seg].length; ++pt) {\n            var xold = x\n            var yold = y\n            var x = path[seg][pt][0]\n            var y = path[seg][pt][1]\n            if (sum == 1) {\n               xsum += x\n               ysum += y\n               sum += 1\n               }\n            else {\n               var xmean = xsum/sum\n               var ymean = ysum/sum\n               var dx = xmean-x0\n               var dy = ymean-y0\n               var d = Math.sqrt(dx*dx+dy*dy)\n               var nx = dy/d\n               var ny = -dx/d\n               var l = Math.abs(nx*(x-x0)+ny*(y-y0))\n               if (l < error) {\n                  xsum += x\n                  ysum += y\n                  sum += 1\n                  }\n               else {\n                  vecpath[vecpath.length-1][vecpath[vecpath.length-1].length] = [xold,yold]\n                  x0 = xold\n                  y0 = yold\n                  xsum = xold\n                  ysum = yold\n                  sum = 1\n                  }\n               }\n            if (pt == (path[seg].length-1)) {\n               vecpath[vecpath.length-1][vecpath[vecpath.length-1].length] = [x,y]\n               }\n            }\n         }\n      //\n      // sort path\n      //\n      if ((vecpath.length > 1) && (sort == true)) {\n         var dmin = w*w+h*h\n         segmin = null\n         for (var seg = 0; seg < vecpath.length; ++seg) {\n            var x = vecpath[seg][0][0]\n            var y = vecpath[seg][0][0]\n            var d = x*x+y*y\n            if (d < dmin) {\n               dmin = d\n               segmin = seg\n               }\n            }\n         if (segmin != null) {\n            var sortpath = [vecpath[segmin]]\n            vecpath.splice(segmin,1)\n            }\n         while (vecpath.length > 0) {\n            var dmin = w*w+h*h\n            var x0 = sortpath[sortpath.length-1][sortpath[sortpath.length-1].length-1][0]\n            var y0 = sortpath[sortpath.length-1][sortpath[sortpath.length-1].length-1][1]\n            segmin = null\n            for (var seg = 0; seg < vecpath.length; ++seg) {\n               var x = vecpath[seg][0][0]\n               var y = vecpath[seg][0][1]\n               var d = (x-x0)*(x-x0)+(y-y0)*(y-y0)\n               if (d < dmin) {\n                  dmin = d\n                  segmin = seg\n                  }\n               }\n            if (segmin != null) {\n               sortpath[sortpath.length] = vecpath[segmin]\n               vecpath.splice(segmin,1)\n               }\n            }\n         }\n      else if (((vecpath.length > 1) && (sort == false)) || (vecpath.length == 1))\n         sortpath = vecpath\n      else\n         sortpath = []\n      //\n      // return path\n      //\n      self.postMessage({path:sortpath})\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1812.6116476429258","left":"3521.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.8622681794886853":{"definition":"//\n// save file\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'save file'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   file:{type:'object',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.contents = evt.detail.contents\n         save_file()\n         }}}\n//\n// outputs\n//\nvar outputs = {}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // info\n   //\n   var text = document.createTextNode('name:')\n      div.appendChild(text)\n      mod.nametext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('size:')\n      div.appendChild(text)\n      mod.sizetext = text\n   div.appendChild(document.createElement('br'))\n   }\n//\n// local functions\n//\nfunction save_file() {\n   var a = document.createElement('a')\n   a.setAttribute('href','data:text/plain;charset=utf-8,'+ \n      encodeURIComponent(mod.contents))\n   a.setAttribute('download',mod.name)\n   a.style.display = 'none'\n   document.body.appendChild(a)\n   a.click()\n   document.body.removeChild(a)\n   mod.nametext.nodeValue = 'name: '+mod.name\n   mods.fit(mod.div)\n   mod.sizetext.nodeValue = 'size: '+mod.contents.length\n   mods.fit(mod.div)\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"2034.9754468998394","left":"2326.7533689104926","filename":"modules/file/save","inputs":{},"outputs":{}},"0.992472539363189":{"definition":"//\n// set object\n//\n// Neil Gershenfeld\n// (c) Massachusetts Institute of Technology 2018\n//\n// This work may be reproduced, modified, distributed, performed, and\n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is\n// provided as is; no warranty is provided, and users accept all\n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'set PCB defaults'\n//\n// initialization\n//\nvar init = function() {\n   //\n   add_output('mill traces (1/64)')\n   add_variable('tool diameter (in)','var00')\n   mod.var00.value = '0.0156'\n   add_variable('cut depth (in)','var01')\n   mod.var01.value = '0.008'\n   add_variable('max depth (in)','var02')\n   mod.var02.value = '0.008'\n   add_variable('offset number','var03')\n   mod.var03.value = '4'\n   //\n   add_output('mill outline (1/32)')\n   add_variable('tool diameter (in)','var10')\n   mod.var10.value = '0.027559055118110236'\n   add_variable('cut depth (in)','var11')\n   mod.var11.value = '0.027559055118110236'\n   add_variable('max depth (in)','var12')\n   mod.var12.value = '0.072'\n   add_variable('offset number','var13')\n   mod.var13.value = '1'\n   //\n   }\n//\n// inputs\n//\nvar inputs = {}\n//\n// outputs\n//\nvar outputs = {\n   settings:{type:'',\n      event:function(vars){\n         mods.output(mod,'settings',vars)\n         }\n      }\n   }\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   }\n//\n// local functions\n//\nfunction add_output(label) {\n   if (mod.settings == undefined) {\n      mod.settings = {}\n      }\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n      var text = document.createTextNode(label)\n         span.appendChild(text)\n      btn.appendChild(span)\n      var f = function(label) {\n         btn.addEventListener('click',function() {\n            for (var s in mod.settings)\n               mod.settings[s].span.style.fontWeight = 'normal'\n            mod.settings[label].span.style.fontWeight = 'bold'\n            var vars = {}\n            for (var v in mod.settings[label].variables)\n               vars[v] = mod.settings[label].variables[v].value\n            outputs.settings.event(vars)\n            })\n         }(label)\n      mod.settings[label] = {span:span,variables:{}}\n      mod.div.appendChild(btn)\n      mod.setting = label\n   mod.div.appendChild(document.createElement('br'))\n   }\nfunction add_variable(label,variable) {\n   var text = document.createTextNode(label)\n      mod.div.appendChild(text)\n   mod.div.appendChild(document.createTextNode(': '))\n   input = document.createElement('input')\n      input.type = 'text'\n      input.size = 10\n      mod[variable] = input\n      mod.div.appendChild(input)\n   mod.settings[mod.setting].variables[label] = input \n   mod.div.appendChild(document.createElement('br'))\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1187.611647642926","left":"2286.8139994703106","filename":"undefined","inputs":{},"outputs":{}},"0.8764917270856811":{"definition":"//\n// path to G-code\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2018\n// \n// Updated: Steven Chew\n// Date:    Feb 20 2019\n// Comments: Added option to output in inch or mm\n// Date:... Oct 28 2019\n// Comments: Corrected feedrate conversion\n//           - inch/s to inch/min\n//...........- mm/s to mm/min\n//\n// Updated: Neil Gershenfeld\n// Date: Oct 28 2020\n// Comments: added mm/s vs mm/min option\n//\n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'path to G-code'\n//\n// initialization\n//\nvar init = function() {\n   mod.cutspeed.value = '2.5'\n   mod.plungespeed.value = '2.5'\n   mod.jogheight.value = '2'\n   mod.spindlespeed.value = '11000'\n   mod.tool.value = '1'\n   mod.coolantoff.checked = true\n   mod.formatMm.checked = true\n   mod.unitMinutes.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   path:{type:'',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.path = evt.detail.path\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         make_path()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   file:{type:'',\n      event:function(str){\n         obj = {}\n         obj.name = mod.name+\".nc\"\n         obj.contents = str\n         mods.output(mod,'file',obj)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // cut speed\n   //\n   div.appendChild(document.createTextNode('cut speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.cutspeed = input\n   div.appendChild(document.createTextNode(' (mm/s)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // plunge speed\n   //\n   div.appendChild(document.createTextNode('plunge speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.plungespeed = input\n   div.appendChild(document.createTextNode(' (mm/s)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // jog height\n   //\n   div.appendChild(document.createTextNode('jog height: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.jogheight = input\n   div.appendChild(document.createTextNode(' (mm)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // spindle speed\n   //\n   div.appendChild(document.createTextNode('spindle speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.spindlespeed = input\n   div.appendChild(document.createTextNode(' (RPM)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // tool\n   //\n   div.appendChild(document.createTextNode('tool: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.tool = input\n   div.appendChild(document.createElement('br'))\n   //\n   // coolant\n   //\n   div.appendChild(document.createTextNode('coolant:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'coolant'\n      input.id = mod.div.id+'coolanton'\n      div.appendChild(input)\n      mod.coolanton = input\n   div.appendChild(document.createTextNode('on'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'coolant'\n      input.id = mod.div.id+'coolantoff'\n      div.appendChild(input)\n      mod.coolantoff = input\n   div.appendChild(document.createTextNode('off'))\n   div.appendChild(document.createElement('br'))\n   //\n   // inch or mm format\n   //\n   div.appendChild(document.createTextNode('format:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'format'\n      input.id = mod.div.id+'formatInch'\n      input.checked = true\n      div.appendChild(input)\n      mod.formatInch = input\n   div.appendChild(document.createTextNode('inch'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'format'\n      input.id = mod.div.id+'formatMm'\n      div.appendChild(input)\n      mod.formatMm = input\n   div.appendChild(document.createTextNode('mm'))\n   div.appendChild(document.createElement('br'))\n   //\n   // second or minute rate units \n   //\n   div.appendChild(document.createTextNode('rate units:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'units'\n      input.id = mod.div.id+'unitSeconds'\n      input.checked = true\n      div.appendChild(input)\n      mod.unitSeconds = input\n   div.appendChild(document.createTextNode('second'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'units'\n      input.id = mod.div.id+'unitMinutes'\n      div.appendChild(input)\n      mod.unitMinutes = input\n   div.appendChild(document.createTextNode('minute'))\n   }\n//\n// local functions\n//\nfunction make_path() {\n   var dx = 25.4*mod.width/mod.dpi\n   var cut_speed = parseFloat(mod.cutspeed.value)\n   var plunge_speed = parseFloat(mod.plungespeed.value)\n   var jog_height = parseFloat(mod.jogheight.value)\n   var nx = mod.width\n   var scale = dx/(nx-1)\n   var in_mm_scale = 1\n   if (mod.formatInch.checked) {\n      dx /= 25.4\n      scale /= 25.4\n      cut_speed /= 25.4\n      plunge_speed /= 25.4\n      jog_height /= 25.4\n      }\n   if (mod.unitMinutes.checked) {\n      cut_speed *= 60\n      plunge_speed *= 60\n      }\n   var spindle_speed = parseFloat(mod.spindlespeed.value)\n   var tool = parseInt(mod.tool.value)\n   str = \"%\\n\" // tape start\n   str += \"G17\\n\" // xy plane\n   if (mod.formatInch.checked)\n      str += \"G20\\n\" // inches\n   if (mod.formatMm.checked)\n      str += \"G21\\n\" // mm\n   str += \"G40\\n\" // cancel tool radius compensation\n   str += \"G49\\n\" // cancel tool length compensation\n   str += \"G54\\n\" // coordinate system 1\n   str += \"G80\\n\" // cancel canned cycles\n   str += \"G90\\n\" // absolute coordinates\n   str += \"G94\\n\" // feed/minute units\n   str += \"T\"+tool+\"M06\\n\" // tool selection, tool change\n   str += \"F\"+cut_speed.toFixed(4)+\"\\n\" // feed rate\n   str += \"S\"+spindle_speed+\"\\n\" // spindle speed\n   if (mod.coolanton.checked)\n      str += \"M08\\n\" // coolant on\n   str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\" // move up before starting spindle\n   str += \"M03\\n\" // spindle on clockwise\n   //str += \"G04 P1\\n\" // give spindle 1 second to spin up...........................comment out\n   //\n   // follow segments\n   //\n   for (var seg = 0; seg < mod.path.length; ++seg) {\n      //\n      // move up to starting point\n      //\n      x = scale*mod.path[seg][0][0]\n      y = scale*mod.path[seg][0][1]\n      str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\"\n      str += \"G00X\"+x.toFixed(4)+\"Y\"+y.toFixed(4)+\"Z\"+jog_height.toFixed(4)+\"\\n\"\n      //\n      // move down\n      //\n      z = scale*mod.path[seg][0][2]\n      str += \"G01Z\"+z.toFixed(4)+\" F\"+plunge_speed.toFixed(4)+\"\\n\"\n      str += \"F\"+cut_speed.toFixed(4)+\"\\n\" //restore xy feed rate\n      for (var pt = 1; pt < mod.path[seg].length; ++pt) {\n         //\n         // move to next point\n         //\n         x = scale*mod.path[seg][pt][0]\n         y = scale*mod.path[seg][pt][1]\n         z = scale*mod.path[seg][pt][2]\n         str += \"G01X\"+x.toFixed(4)+\"Y\"+y.toFixed(4)+\"Z\"+z.toFixed(4)+\"\\n\"\n         }\n      }\n   //\n   // finish\n   //\n   str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\" // move up before stopping spindle\n  //\n   str += \"G1X0Y0Z0\\n\" // movetoXYZ0\n  //\n   str += \"M05\\n\" // spindle stop\n   if (mod.coolanton.checked)\n      str += \"M09\\n\" // coolant off\n   str += \"M30\\n\" // program end and reset\n   str += \"%\\n\" // tape end\n   //\n   // output file\n   //\n   outputs.file.event(str)\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n\n","top":"1566.892543840524","left":"2295.9482640838332","filename":"modules/path/formats/g-code","inputs":{},"outputs":{}}},"links":["{\"source\":\"{\\\"id\\\":\\\"0.07944144280928633\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8903773266711255\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.47383876715576023\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"distances\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"distances\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.07944144280928633\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.08127540142793499\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.6488303557466412\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.6488303557466412\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.47383876715576023\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.08127540142793499\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"imageInfo\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"imageInfo\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"offset\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"offset\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"toolpath\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.2892270043957246\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"toolpath\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.8903773266711255\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.10309904694903338\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.10309904694903338\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"path\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"path\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.992472539363189\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"settings\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"settings\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.2892270043957246\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"toolpath\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8764917270856811\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"path\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.8764917270856811\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"file\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8622681794886853\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"file\\\"}\"}"]}
\ No newline at end of file
diff --git a/docs/Instruction/images/proverXL/mods/mill_2D_PCB_svg.html b/docs/Instruction/images/proverXL/mods/mill_2D_PCB_svg.html
new file mode 100644
index 0000000000000000000000000000000000000000..d873f5a36b13ef118d20953e7775a9b30605ba9d
--- /dev/null
+++ b/docs/Instruction/images/proverXL/mods/mill_2D_PCB_svg.html
@@ -0,0 +1,1915 @@
+<html>
+<head><meta charset='utf-8'>
+<title>mods</title>
+</head>
+<body link='black' alink='black' vlink='black'>
+<script>
+//
+// mods.js
+//
+// Neil Gershenfeld
+// (c) Massachusetts Institute of Technology 2018
+//
+// This work may be reproduced, modified, distributed, performed, and
+// displayed for any purpose, but must acknowledge the mods
+// project. Copyright is retained and must be preserved. The work is
+// provided as is; no warranty is provided, and users accept all
+// liability.
+//
+// closure
+//
+(function(){
+//
+// globals
+//
+var mods = {}
+mods.mod = {}
+mods.globals = {}
+mods.ui = {source:null,
+   progname:'',
+   padding:7,
+   bezier:100,
+   canvas:250,
+   rows:5,
+   cols:20,
+   link_color:'rgb(0,0,128)',
+   link_highlight:'rgb(255,0,0)',
+   header:50,
+   selected:{},
+   mousedown:null,
+   menu:null,
+   top:null,
+   left:null,
+   xstart:null,
+   ystart:null,
+   xtrans:null,
+   ytrans:null
+   }
+//
+// UI
+//
+document.body.style.overflow = "hidden"
+function mods_transform() {
+   var transform = document.body.style.transform
+   var m = new DOMMatrix(getComputedStyle(document.body).transform)
+   var s = m.m11
+   var tx = m.m41/s
+   var ty = m.m42/s
+   var origin = document.body.style.transformOrigin
+      var pxx = origin.indexOf('px')
+      var ox = parseFloat(origin.slice(0,pxx))
+      var pxy = origin.indexOf('px',pxx+2)
+      var oy = parseFloat(origin.slice(pxx+2,pxy))
+   return({s:s,tx:tx,ty:ty,ox:ox,oy:oy})
+   }
+document.body.style.transform = 'scale(1) translate(0px,0px)'
+document.body.style.transformOrigin = '0px 0px'
+//
+// scroll wheel event
+//
+window.addEventListener('wheel',function(evt) {
+   /*
+   (xw+tx-ox)*s+ox = xs
+   xw = ox-tx+(xs-ox)/s
+   (xw+tx0-ox0)*s+ox0  = (xw+tx1-ox1)*s+ox1
+   (tx0-ox0)*s+ox0  = (tx1-ox1)*s+ox1
+   tx0+(ox1-ox0)+(ox0-ox1)/s  = tx1
+   tx0+(ox1-ox0)*(1-1/s)  = tx1
+   */
+   var el = document.elementFromPoint(evt.pageX,evt.pageY)
+   if ((el.tagName == "HTML") || (el.tagName == "BODY")) {
+      set_prompt('scroll to zoom')
+      evt.preventDefault()
+      evt.stopPropagation()
+      var t = mods_transform()
+      if (evt.deltaY > 0)
+         var scale = t.s*1.1
+      else
+         var scale = t.s*0.9
+      var tx = t.tx+(evt.pageX-t.ox)*(1-1/t.s)
+      var ty = t.ty+(evt.pageY-t.oy)*(1-1/t.s)
+      document.body.style.transform = `scale(${scale}) translate(${tx}px,${ty}px)`
+      document.body.style.transformOrigin = `${evt.pageX}px ${evt.pageY}px`
+      }
+   })
+//
+// body mouse events
+//
+window.addEventListener('mousedown',function(evt) {
+   //
+   // get element mouse is over
+   //
+   var el = document.elementFromPoint(evt.pageX,evt.pageY)
+   //
+   // check if on body
+   //
+   if ((el.tagName == "HTML") || (el.tagName == "BODY")) {
+      //
+      // remember button
+      //
+      mods.ui.mousedown = evt.button
+      if (mods.ui.mousedown == 0) {
+         set_prompt('left-drag to pan, right-drag to select')
+         if (mods.ui.menu != null) {
+            document.body.removeChild(mods.ui.menu)
+            mods.ui.menu = null
+            }
+         }
+      else if (mods.ui.mousedown == 2) {
+         set_prompt('menu; left-drag to pan, right-drag to select')
+         }
+      //
+      // remember position
+      //
+      var t = mods_transform()
+      mods.ui.xstart = evt.pageX
+      mods.ui.ystart = evt.pageY
+      mods.ui.xtrans = t.tx
+      mods.ui.ytrans = t.ty
+      }
+   })
+window.addEventListener('mousemove',function(evt) {
+   //
+   // mouse move
+   //
+   if (mods.ui.mousedown != null) {
+      evt.preventDefault()
+      evt.stopPropagation()
+      var t = mods_transform()
+      if (mods.ui.mousedown == 0) {
+         //
+         // pan on left drag
+         //
+         xtrans = mods.ui.xtrans+(evt.pageX-mods.ui.xstart)/t.s
+         ytrans = mods.ui.ytrans+(evt.pageY-mods.ui.ystart)/t.s
+         document.body.style.transform = `scale(${t.s}) translate(${xtrans}px,${ytrans}px)`
+         }
+      else if (mods.ui.mousedown == 2) {
+         //
+         // select on right drag
+         //
+         var rect = document.getElementById('svgrect')
+         if (rect == undefined) {
+            //
+            // start dragging
+            //
+            if (mods.ui.menu != null) {
+               document.body.removeChild(mods.ui.menu)
+               mods.ui.menu = null
+               }
+            set_prompt('right-drag to select')
+            var t = mods_transform()
+            var rect = document.createElementNS('http://www.w3.org/2000/svg','rect')
+               rect.setAttribute('id','svgrect')
+               rect.setAttribute('x',t.ox-t.tx+(evt.pageX-t.ox)/t.s)
+               rect.setAttribute('y',t.oy-t.ty+(evt.pageY-t.oy)/t.s-mods.ui.header)
+               rect.setAttribute('width',0)
+               rect.setAttribute('height',0)
+               rect.setAttribute('fill','rgb(200,200,200)')
+               rect.setAttribute('stroke','none')
+            var svg = document.getElementById('svg')
+               svg.insertBefore(rect,svg.firstChild)
+            }
+         else {
+            //
+            // continue dragging
+            //
+            var rect = document.getElementById('svgrect')
+            var xp = t.ox-t.tx+(mods.ui.xstart-t.ox)/t.s
+            var yp = t.oy-t.ty+(mods.ui.ystart-t.oy)/t.s-mods.ui.header
+            var xw = t.ox-t.tx+(evt.pageX-t.ox)/t.s
+            var yw = t.oy-t.ty+(evt.pageY-t.oy)/t.s-mods.ui.header
+            if (xw < xp) {
+               rect.setAttribute('x',xw)
+               rect.setAttribute('width',xp-xw)
+               }
+            else
+               rect.setAttribute('width',xw-xp)
+            if (yw < yp) {
+               rect.setAttribute('y',yw)
+               rect.setAttribute('height',yp-yw)
+               }
+            else
+               rect.setAttribute('height',yw-yp)
+            }
+         }
+      }
+   })
+window.addEventListener('mouseup',function(evt) {
+   //
+   // mouse up
+   //
+   mods.ui.mousedown = null
+   //
+   // check for selection rectangle
+   //
+   var rect = document.getElementById('svgrect')
+   if (rect != null) {
+      //
+      // rectangle exists, selecting modules
+      //
+      var x = parseFloat(rect.getAttribute('x'))
+      var y = parseFloat(rect.getAttribute('y'))
+      var width = parseFloat(rect.getAttribute('width'))
+      var height = parseFloat(rect.getAttribute('height'))
+      svg.removeChild(rect)
+      var modules = document.getElementById('modules')
+      //
+      // loop to find selected modules
+      //
+      mods.ui.selected = {}
+      for (var module in modules.childNodes) {
+         var container = modules.childNodes[module]
+         var id = container.id
+         if (id != undefined) {
+            var name = container.firstChild
+            var left = parseFloat(container.dataset.left)
+            var top = parseFloat(container.dataset.top)
+            if ((x <= left) && (left <= x+width) && (y <= top) && (top <= y+height)) {
+               //
+               // module is in selection rectangle
+               //
+               name.style.fontWeight = "bold"
+               mods.ui.selected[id] = true
+               }
+            else {
+               //
+               // module is not in selection rectangle
+               //
+               name.style.fontWeight = "normal"
+               }
+            }
+         }
+      }
+   })
+//
+// context menu
+//
+window.addEventListener('contextmenu',function(evt){
+   evt.stopPropagation()
+   evt.preventDefault()
+   if (mods.ui.menu != null) {
+      document.body.removeChild(mods.ui.menu)
+      mods.ui.menu = null
+      }
+   var div = document.createElement('div')
+   make_menu(div)
+   add_menu(div,'modules',modules)
+   add_menu(div,'programs',programs)
+   add_menu(div,'edit',edit)
+   add_menu(div,'options',options)
+   document.body.appendChild(div)
+   function make_menu(div) {
+      mods.ui.menu = div
+      div.style.position = "absolute"
+      var t = mods_transform()
+      div.style.top = t.oy-t.ty+(evt.pageY-t.oy)/t.s
+      div.style.left = t.ox-t.tx+(evt.pageX-t.ox)/t.s
+      div.style.zIndex = 0
+      div.style.cursor = 'default'
+      div.style.backgroundColor = "rgb(220,255,255)"
+      div.style.padding = 1.5*mods.ui.padding
+      div.style.textAlign = 'left'
+      div.style.border = '2px solid'
+      div.style.borderRadius = '10px'
+      }
+   function add_menu(div,text,click) {
+      var textdiv = document.createElement('div')
+      textdiv.appendChild(document.createTextNode(text))
+      textdiv.appendChild(document.createElement('br'))
+      textdiv.addEventListener('mouseover',function(evt){
+         evt.target.style.fontWeight = 'bold'})
+      textdiv.addEventListener('mouseout',function(evt){
+         evt.target.style.fontWeight = 'normal'})
+      textdiv.addEventListener('mousedown',click)
+      textdiv.addEventListener('touchend',click)
+      div.appendChild(textdiv)
+      }
+   //
+   // modules menu
+   //
+   function modules(evt) {
+      evt.preventDefault()
+      evt.stopPropagation()
+      document.body.removeChild(evt.target.parentNode)
+      var div = document.createElement('div')
+      make_menu(div)
+      set_prompt('modules')
+      //
+      // open server module
+      //
+      add_menu(div,'open server module',function(evt){
+         function module_label(label) {
+            var div = document.createElement('div')
+            var i = document.createElement('i')
+            i.appendChild(document.createTextNode(label))
+            div.appendChild(i)
+            div.appendChild(document.createElement('br'))
+            menu.appendChild(div)
+            }
+         function module_menu(label,module) {
+            var div = document.createElement('div')
+            div.appendChild(
+               document.createTextNode('\u00A0\u00A0\u00A0'+label))
+            div.addEventListener('mouseover',function(evt){
+               evt.target.style.fontWeight = 'bold'})
+            div.addEventListener('mouseout',function(evt){
+               evt.target.style.fontWeight = 'normal'})
+            div.addEventListener('mousedown',function(evt){
+               evt.preventDefault()
+               evt.stopPropagation()
+               document.body.removeChild(evt.target.parentNode)
+               mods.ui.menu = null
+               var t = mods_transform()
+               mod_message_handler(module,
+                  t.oy-t.ty+(evt.pageY-t.oy)/t.s,
+                  t.ox-t.tx+(evt.pageX-t.ox)/t.s)})
+            div.appendChild(document.createElement('br'))
+            menu.appendChild(div)
+            }
+         document.body.removeChild(evt.target.parentNode)
+         var menu = document.createElement('div')
+         make_menu(menu)
+         document.body.appendChild(menu)
+         menu.style.width = mods.ui.canvas
+         menu.style.height = mods.ui.canvas
+         menu.style.overflow = 'auto'
+         var req = new XMLHttpRequest()
+         req.responseType = 'text'
+         req.onreadystatechange = function() {
+            if (req.readyState == XMLHttpRequest.DONE) {
+               var str = req.response
+               eval(str)
+               }
+            }
+         req.open('GET','modules/index.js'+'?rnd='+Math.random())
+         req.send()
+         })
+      //
+      // open local module
+      //
+      add_menu(div,'open local module',function(evt){
+         var t = mods_transform()
+         mods.ui.top = t.oy-t.ty+(evt.pageY-t.oy)/t.s
+         mods.ui.left = t.ox-t.tx+(evt.pageX-t.ox)/t.s
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         var file = document.getElementById('mod_input')
+         file.value = null
+         file.click()
+         })
+      //
+      // open remote module
+      //
+      add_menu(div,'open remote module',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         set_prompt('remotes not yet implemented')
+         })
+      document.body.appendChild(div)
+      }
+   //
+   // programs menu
+   //
+   function programs(evt) {
+      evt.preventDefault()
+      evt.stopPropagation()
+      document.body.removeChild(evt.target.parentNode)
+      var div = document.createElement('div')
+      make_menu(div)
+      set_prompt('programs')
+      //
+      // open local program
+      //
+      add_menu(div,'open local program',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         var file = document.getElementById('prog_input')
+         file.value = null
+         file.click()
+         })
+      //
+      // open server program
+      //
+      add_menu(div,'open server program',function(evt){
+         function program_label(label) {
+            var div = document.createElement('div')
+            var i = document.createElement('i')
+            i.appendChild(document.createTextNode(label))
+            div.appendChild(i)
+            div.appendChild(document.createElement('br'))
+            menu.appendChild(div)
+            }
+         function program_menu(label,program) {
+            var div = document.createElement('div')
+            div.appendChild(
+               document.createTextNode('\u00A0\u00A0\u00A0'+label))
+            div.addEventListener('mouseover',function(evt){
+               evt.target.style.fontWeight = 'bold'})
+            div.addEventListener('mouseout',function(evt){
+               evt.target.style.fontWeight = 'normal'})
+            div.addEventListener('mousedown',function(evt){
+               evt.preventDefault()
+               evt.stopPropagation()
+               if (location.port == 80)
+                  var uri = 'http://'+location.hostname
+                     +'?program='+program
+               else
+                  var uri = 'http://'+location.hostname+':'
+                     +location.port+'?program='+program
+               set_prompt('<a href='+uri+'>program link</a>')
+               prog_message_handler(program)
+               document.body.removeChild(evt.target.parentNode)
+               mods.ui.menu = null
+               })
+            div.appendChild(document.createElement('br'))
+            menu.appendChild(div)
+            }
+         document.body.removeChild(evt.target.parentNode)
+         var menu = document.createElement('div')
+         make_menu(menu)
+         document.body.appendChild(menu)
+         menu.style.width = mods.ui.canvas
+         menu.style.height = mods.ui.canvas
+         menu.style.overflow = 'auto'
+         var req = new XMLHttpRequest()
+         req.responseType = 'text'
+         req.onreadystatechange = function() {
+            if (req.readyState == XMLHttpRequest.DONE) {
+               var str = req.response
+               eval(str)
+               }
+            }
+         req.open('GET','programs/index.js'+'?rnd='+Math.random())
+         req.send()
+         })
+      //
+      // open remote program
+      //
+      add_menu(div,'open remote program',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         set_prompt('remotes not yet implemented')
+         })
+      //
+      // save local program
+      //
+      add_menu(div,'save local program',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         save_program()
+         })
+      //
+      // save local page
+      //
+      add_menu(div,'save local page',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         save_page()
+         })
+      document.body.appendChild(div)
+      }
+   //
+   // edit menu
+   //
+   function edit(evt) {
+      evt.preventDefault()
+      evt.stopPropagation()
+      document.body.removeChild(evt.target.parentNode)
+      var div = document.createElement('div')
+      make_menu(div)
+      set_prompt('edit')
+      //
+      // cut
+      //
+      add_menu(div,'cut',function(evt){
+         evt.preventDefault()
+         evt.stopPropagation()
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         if ((Object.keys(mods.ui.selected).length) == 0) {
+            set_prompt("nothing selected")
+            }
+         else {
+            for (var id in mods.ui.selected) {
+               var div = document.getElementById(id)
+               delete_module(id)
+               mods.ui.selected = {}
+               }
+            }
+         })
+      //
+      // copy
+      //
+      add_menu(div,'copy',function(evt){
+         evt.preventDefault()
+         evt.stopPropagation()
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         set_prompt('copy not yet implemented')
+         })
+      //
+      // paste
+      //
+      add_menu(div,'paste',function(evt){
+         evt.preventDefault()
+         evt.stopPropagation()
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         set_prompt('paste not yet implemented')
+         })
+      document.body.appendChild(div)
+      }
+   //
+   // options menu
+   //
+   function options(evt) {
+      evt.preventDefault()
+      evt.stopPropagation()
+      document.body.removeChild(evt.target.parentNode)
+      mods.ui.menu = null
+      var div = document.createElement('div')
+      make_menu(div)
+      set_prompt('options')
+      //
+      // view files
+      //
+      add_menu(div,'view files',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         var win = window.open('files.html')
+         })
+      document.body.appendChild(div)
+      //
+      // view project
+      //
+      add_menu(div,'view project',function(evt){
+         document.body.removeChild(evt.target.parentNode)
+         mods.ui.menu = null
+         var win = window.open('https://gitlab.cba.mit.edu/pub/mods')
+         })
+      document.body.appendChild(div)
+      }
+   })
+//
+// prompt
+//
+document.body.appendChild(document.createTextNode(' '))
+var span = document.createElement('span')
+   span.setAttribute('id','logo')
+   span.style.display = 'inline-block'
+   span.style.verticalAlign = 'middle'
+   span.style.width = 20
+   span.style.height = 20
+   span.style.padding = mods.ui.padding
+   span.appendChild(logo(1))
+   document.body.appendChild(span)
+document.body.appendChild(document.createTextNode(' '))
+var span = document.createElement('span')
+   span.setAttribute('id','prompt')
+   span.style.display = 'inline-block'
+   span.style.verticalAlign = 'middle'
+   var innerspan = document.createElement('span')
+      span.appendChild(innerspan)
+   document.body.appendChild(span)
+function logo(size) {
+   var x = 0
+   var y = 2.8*size/3.8
+   var svgNS = "http://www.w3.org/2000/svg"
+   var logo = document.createElementNS(svgNS,"svg")
+   logo.setAttributeNS("http://www.w3.org/2000/xmlns/",
+      "xmlns:xlink","http://www.w3.org/1999/xlink")
+   logo.setAttributeNS(null,'viewBox',"0 0 "+size+" "+size)
+   var new_rect = document.createElementNS(svgNS,"rect");
+   new_rect.setAttribute("width",size/3.8)
+   new_rect.setAttribute("height",size/3.8)
+   new_rect.setAttribute("x",x)
+   new_rect.setAttribute("y",y)
+   new_rect.setAttribute("fill","blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS,"rect");
+   new_rect.setAttribute("width",size/3.8)
+   new_rect.setAttribute("height",size/3.8)
+   new_rect.setAttribute("x",x+1.4*size/3.8)
+   new_rect.setAttribute("y",y)
+   new_rect.setAttribute("fill","blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS,"rect");
+   new_rect.setAttribute("width",size/3.8)
+   new_rect.setAttribute("height",size/3.8)
+   new_rect.setAttribute("x",x+2.8*size/3.8)
+   new_rect.setAttribute("y",y)
+   new_rect.setAttribute("fill","blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS, "rect");
+   new_rect.setAttribute("width",size/3.8)
+   new_rect.setAttribute("height",size/3.8)
+   new_rect.setAttribute("x",x)
+   new_rect.setAttribute("y",y-1.4*size/3.8)
+   new_rect.setAttribute("fill","blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS, "rect");
+   new_rect.setAttribute("width", size / 3.8)
+   new_rect.setAttribute("height", size / 3.8)
+   new_rect.setAttribute("x", x + 2.8 * size / 3.8)
+   new_rect.setAttribute("y", y - 1.4 * size / 3.8)
+   new_rect.setAttribute("fill", "blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS, "rect");
+   new_rect.setAttribute("width", size / 3.8)
+   new_rect.setAttribute("height", size / 3.8)
+   new_rect.setAttribute("x", x + 1.4 * size / 3.8)
+   new_rect.setAttribute("y", y - 2.8 * size / 3.8)
+   new_rect.setAttribute("fill", "blue")
+   logo.appendChild(new_rect)
+   var new_rect = document.createElementNS(svgNS, "rect");
+   new_rect.setAttribute("width", size / 3.8)
+   new_rect.setAttribute("height", size / 3.8)
+   new_rect.setAttribute("x", x + 2.8 * size / 3.8)
+   new_rect.setAttribute("y", y - 2.8 * size / 3.8)
+   new_rect.setAttribute("fill", "blue")
+   logo.appendChild(new_rect)
+   var new_circ = document.createElementNS(svgNS, "circle");
+   new_circ.setAttribute("r", size / (2 * 3.8))
+   new_circ.setAttribute("cx", x + size / (2 * 3.8))
+   new_circ.setAttribute("cy", y + size / (2 * 3.8) - 2.8 * size / 3.8)
+   new_circ.setAttribute("fill", "red")
+   logo.appendChild(new_circ)
+   var new_circ = document.createElementNS(svgNS, "circle");
+   new_circ.setAttribute("r", size / (2 * 3.8))
+   new_circ.setAttribute("cx", x + size / (2 * 3.8) + 1.4 * size / 3.8)
+   new_circ.setAttribute("cy", y + size / (2 * 3.8) - 1.4 * size / 3.8)
+   new_circ.setAttribute("fill", "red")
+   logo.appendChild(new_circ)
+   return logo
+   }
+set_prompt('right click/two finger/long press for menu; scroll for zoom, drag for pan')
+//
+// SVG canvas for drawing
+//
+var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg")
+   svg.style.position = 'absolute'
+   svg.style.backgroundColor = 'rgb(255,255,255)'
+   svg.style.top = mods.ui.header
+   svg.style.left = 0
+   svg.style.zIndex = 0
+   svg.style.overflow = 'visible'
+   svg.setAttribute('width',40)
+   svg.setAttribute('height',40)
+   svg.setAttribute('id','svg')
+   svg.setAttributeNS("http://www.w3.org/2000/xmlns/","xmlns:xlink","http://www.w3.org/1999/xlink")
+   document.body.appendChild(svg)
+//
+// link container
+//
+var svg = document.getElementById('svg')
+var g = document.createElementNS('http://www.w3.org/2000/svg','g')
+   g.setAttribute('id','links')
+   svg.appendChild(g)
+//
+// file reading controls
+//
+var file = document.createElement('input')
+   file.setAttribute('type','file')
+   file.setAttribute('id','mod_input')
+   file.style.position = 'absolute'
+   file.style.left = 0
+   file.style.top = 0
+   file.style.width = 0
+   file.style.height = 0
+   file.style.opacity = 0
+   file.addEventListener('change',function() {
+      mod_read_handler()
+      })
+   document.body.appendChild(file)
+var file = document.createElement('input')
+   file.setAttribute('type','file')
+   file.setAttribute('id','prog_input')
+   file.style.position = 'absolute'
+   file.style.left = 0
+   file.style.top = 0
+   file.style.width = 0
+   file.style.height = 0
+   file.style.opacity = 0
+   file.addEventListener('change',function() {
+      prog_read_handler()
+      })
+   document.body.appendChild(file)
+//
+// module container
+//
+var div = document.createElement('div')
+   div.setAttribute('id','modules')
+   document.body.appendChild(div)
+//
+// check for program load query
+//
+if (location.search.length > 0) {
+   var args = location.search.slice(1).split('&')
+   for (var a in args) {
+      var arg = args[a].split('=')
+      if (arg[0] == 'program')
+      prog_message_handler(arg[1])
+      }
+   }
+//
+// program routines
+//
+function prog_read_handler(event) {
+   var file = document.getElementById('prog_input')
+   var file_reader = new FileReader()
+   file_reader.onload = prog_load_handler
+   file_reader.readAsText(file.files[0])
+   mods.ui.progname = file.files[0].name
+   }
+function prog_message_handler(filename) {
+   var req = new XMLHttpRequest()
+   req.responseType = 'text'
+   req.onreadystatechange = function() {
+      if (req.readyState == XMLHttpRequest.DONE) {
+         prog = JSON.parse(req.response)
+         prog_load(prog)
+         }
+      }
+   var index = filename.lastIndexOf('/')
+   if (index != -1) {
+      mods.ui.progname = filename.slice(index+1)
+      }
+   else
+      mods.ui.progname = filename
+   //
+   // send request, with random query to prevent caching
+   //
+   req.open('GET',filename+'?rnd='+Math.random())
+   req.send()
+   }
+function prog_load_handler(event) {
+   prog = JSON.parse(event.target.result)
+   prog_load(prog)
+   }
+function prog_load(prog) {
+   //
+   // load modules
+   //
+   for (var idnumber in prog.modules) {
+      var module = prog.modules[idnumber]
+      var str = module.definition
+      try {
+         eval('var args = '+str)
+         }
+      catch (err) {
+         console.log(err.message)
+         return
+         }
+      args.definition = str
+      args.id = idnumber
+      var t = mods_transform()
+      var xw = t.ox-t.tx+(mods.ui.xstart-t.ox)/t.s
+      var yw = t.oy-t.ty+(mods.ui.ystart-t.oy)/t.s-mods.ui.header
+      args.top = parseFloat(module.top)+yw
+      args.left = parseFloat(module.left)+xw
+      args.filename = module.filename
+      add_module(args)
+      }
+   //
+   // load links
+   //
+   for (var linkid in prog.links) {
+      var str = prog.links[linkid]
+      eval('var link = '+str)
+      eval('var linksrc = '+link.source)
+      eval('var linkdst = '+link.dest)
+      var src = document.getElementById(
+         JSON.stringify({id:linksrc.id,type:linksrc.type,name:linksrc.name}))
+      var dst = document.getElementById(
+         JSON.stringify({id:linkdst.id,type:linkdst.type,name:linkdst.name}))
+      add_link(src,dst)
+      }
+   }
+function save_program() {
+   set_prompt('program name? ')
+   get_prompt(mods.ui.progname,function(filename){
+      mods.ui.progname = filename
+      var prog = {modules:{},links:[]}
+      var modules = document.getElementById('modules')
+      //
+      // save modules
+      //
+      for (var c = 0; c < modules.childNodes.length; ++c) {
+         var module = modules.childNodes[c]
+         var idnumber = module.id
+         prog.modules[idnumber] = {
+            definition:update_module_definition(
+               idnumber,module.dataset.definition),
+            top:module.dataset.top,
+            left:module.dataset.left,
+            filename: module.dataset.filename,
+            inputs:{},
+            outputs:{}
+            }
+         }
+      //
+      // save links
+      //
+      var svg = document.getElementById('svg')
+      var links = svg.getElementById('links')
+         for (var l = 0; l < links.childNodes.length; ++l) {
+            var link = links.childNodes[l]
+            var linkid = link.id
+            prog.links.push(linkid)
+            }
+      //
+      // download
+      //
+      var text = JSON.stringify(prog)
+      var a = document.createElement('a')
+      a.setAttribute('href','data:text/plain;charset=utf-8,'+
+         encodeURIComponent(text))
+      a.setAttribute('download',filename)
+      a.style.display = 'none'
+      document.body.appendChild(a)
+      a.click()
+      document.body.removeChild(a)
+      })
+   }
+function save_page() {
+   set_prompt('page name? ')
+   get_prompt(mods.ui.progname+".html",function(filename){
+      mods.ui.progname = filename
+      var prog = {modules:{},links:[]}
+      var modules = document.getElementById('modules')
+      //
+      // save modules
+      //
+      for (var c = 0; c < modules.childNodes.length; ++c) {
+         var module = modules.childNodes[c]
+         var idnumber = module.id
+         prog.modules[idnumber] = {
+            definition:update_module_definition(
+               idnumber,module.dataset.definition),
+            top:module.dataset.top,
+            left:module.dataset.left,
+	    filename: module.dataset.filename,
+            inputs:{},
+            outputs:{}
+            }
+         }
+      //
+      // save links
+      //
+      var svg = document.getElementById('svg')
+      var links = svg.getElementById('links')
+         for (var l = 0; l < links.childNodes.length; ++l) {
+            var link = links.childNodes[l]
+            var linkid = link.id
+            prog.links.push(linkid)
+            }
+      //
+      // read mods.js
+      //
+      var req = new XMLHttpRequest()
+      req.responseType = 'text'
+      req.onreadystatechange = function() {
+         if (req.readyState == XMLHttpRequest.DONE) {
+            //
+            // construct page
+            //
+            var str = req.response
+            var text ="<html>\n"
+            text += "<head><meta charset='utf-8'>\n"
+            text += "<title>mods</title>\n"
+            text += "</head>\n"
+            text += "<body link='black' alink='black' vlink='black'>\n"
+            text += "<"+"script"+">\n"
+            text += str
+            text += "var prog = JSON.parse(JSON.stringify("+JSON.stringify(prog)+"))\n"
+            text += "window.mods_prog_load(prog)\n"
+            text += "</"+"script"+">\n"
+            text += "</body>\n"
+            text += "</html>\n"
+            //
+            // download page
+            //
+            var a = document.createElement('a')
+            a.setAttribute('href','data:text/plain;charset=utf-8,'+
+               encodeURIComponent(text))
+            a.setAttribute('download',filename)
+            a.style.display = 'none'
+            document.body.appendChild(a)
+            a.click()
+            document.body.removeChild(a)
+            }
+         }
+      //
+      // send request, with random query to prevent caching
+      //
+      req.open('GET','js/mods.js'+'?rnd='+Math.random())
+      req.send()
+      })
+   }
+//
+// add program load to window
+//
+window.mods_prog_load = function(prog) {
+   prog_load(prog)
+   }
+//
+// module routines
+//
+function mod_read_handler(event) {
+   var file = document.getElementById('mod_input')
+   var file_reader = new FileReader()
+   file_reader.onload = mod_load_handler
+   file_reader.readAsText(file.files[0])
+   }
+function mod_message_handler(filename,top,left) {
+   var req = new XMLHttpRequest()
+   req.responseType = 'text'
+   req.onreadystatechange = function() {
+      if (req.readyState == XMLHttpRequest.DONE) {
+         var str = req.response
+         try {
+            eval('var args = '+str)
+            }
+         catch (err) {
+            console.log(err.message)
+            return
+            }
+         args.definition = str
+         args.id = String(Math.random())
+         args.top = top
+         args.left = left
+         args.filename = filename
+         add_module(args)
+         }
+      }
+   //
+   // send request, with random query to prevent caching
+   //
+   req.open('GET',filename+'?rnd='+Math.random())
+   req.send()
+   }
+function mod_load_handler(event) {
+   str = event.target.result
+   try {
+      eval('var args = '+str)
+      }
+   catch (err) {
+      console.log(err.message)
+      return
+      }
+   args.definition = str
+   args.id = String(Math.random())
+   args.top = mods.ui.top
+   args.left = mods.ui.left
+   args.filename = ""
+   var div = add_module(args)
+   return(div)
+   }
+function add_module(args) {
+   var idnumber = args.id
+   mods.mod[idnumber] = args.mod
+   var modules = document.getElementById('modules')
+   //
+   // container
+   //
+   var container = document.createElement('div')
+      container.setAttribute("id",idnumber)
+      container.style.position = "absolute"
+      container.style.top = args.top
+      container.style.left = args.left
+      container.dataset.top = args.top
+      container.dataset.left = args.left
+      container.dataset.filename = args.filename
+      container.dataset.name = args.name
+      container.style.zIndex = 0
+      container.style.width = window.innerWidth
+      container.dataset.definition = args.definition
+      modules.appendChild(container)
+   //
+   // name
+   //
+   var divname = document.createElement('div')
+      divname.appendChild(document.createTextNode(args.name))
+      divname.addEventListener('mouseover',name_over)
+      divname.addEventListener('mouseout',name_out)
+      divname.addEventListener('mousedown',name_mousedown)
+      divname.addEventListener('touchstart',name_touchdown)
+      divname.style.backgroundColor = "rgb(210,240,210)"
+      divname.style.padding = 1.5*mods.ui.padding
+      divname.style.position = "absolute"
+      divname.style.cursor = 'default'
+      divname.style.top = 0
+      divname.style.left = 0
+      divname.style.textAlign = 'center'
+      divname.style.border = '2px solid'
+      divname.style.borderRadius = '10px'
+      container.appendChild(divname)
+   //
+   // controls
+   //
+   var divctrl = document.createElement('div')
+      var editspan = document.createElement('span')
+         editspan.innerHTML = 'edit'
+         editspan.style.fontWeight = 'normal'
+         editspan.addEventListener('mouseover',function(event){
+            set_prompt('click to edit')
+            editspan.style.fontWeight = 'bold'})
+         editspan.addEventListener('mouseout',function(event){
+            set_prompt('')
+            editspan.style.fontWeight = 'normal'})
+         editspan.addEventListener('mousedown',edit_module)
+         divctrl.appendChild(editspan)
+      var delspan = document.createElement('span')
+         delspan.innerHTML = ' delete '
+         delspan.addEventListener('mouseover',function(event){
+            set_prompt('click to delete')
+            delspan.style.fontWeight = 'bold'})
+         delspan.addEventListener('mouseout',function(event){
+            set_prompt('')
+            delspan.style.fontWeight = 'normal'})
+         delspan.addEventListener('mousedown',function(event){
+            delete_module(event.target.parentNode.parentNode.id)})
+         divctrl.appendChild(delspan)
+      divctrl.style.backgroundColor = "rgb(240,220,220)"
+      divctrl.style.padding = mods.ui.padding
+      divctrl.style.position = "absolute"
+      divctrl.style.cursor = 'default'
+      divctrl.style.top = divname.clientHeight
+      divctrl.style.left = 0
+      divctrl.style.textAlign = 'center'
+      divctrl.style.border = '2px solid'
+      divctrl.style.borderRadius = '10px'
+      container.appendChild(divctrl)
+      divctrl.style.left = divname.clientWidth/2-divctrl.clientWidth/2
+   //
+   // interface
+   //
+   var divint = document.createElement('div')
+      divint.style.backgroundColor = "rgb(240,240,240)"
+      divint.style.padding = mods.ui.padding
+      divint.style.position = "absolute"
+      divint.style.top = divname.clientHeight+divctrl.clientHeight
+      divint.style.textAlign = 'center'
+      divint.style.border = '2px solid'
+      divint.style.borderRadius = '10px'
+      divint.setAttribute('id',JSON.stringify({id:idnumber,type:'interface'}))
+      divint.dataset.id = idnumber
+      divint.dataset.divNameSize = divname.clientWidth
+      args.interface(divint)
+      container.appendChild(divint)
+      divint.style.left = divname.clientWidth/2-divint.clientWidth/2
+   //
+   // inputs
+   //
+   var divin = document.createElement('div')
+      divin.setAttribute('id',JSON.stringify({id:idnumber,type:'inputs'}))
+      var b = document.createElement('b')
+         b.appendChild(document.createTextNode('inputs'))
+         divin.appendChild(b)
+      divin.style.backgroundColor = "rgb(240,240,210)"
+      divin.style.padding = mods.ui.padding
+      divin.style.paddingLeft = '2px'
+      divin.style.position= "absolute"
+      divin.style.top = divname.clientHeight+divctrl.clientHeight
+      divin.style.textAlign = 'left'
+      divin.style.border = '2px solid'
+      divin.style.borderRadius = '10px'
+      divin.setAttribute('id',JSON.stringify({id:idnumber,type:'inputs'}))
+      divin.style.cursor = 'default'
+      divin.addEventListener('mousedown',nothing)
+      divin.addEventListener('touchstart',nothing)
+      divin.addEventListener('mouseup',nothing)
+      divin.addEventListener('touchend',nothing)
+      for (var v in args.inputs) {
+         var div = document.createElement('div')
+         if (args.inputs[v].label != undefined)
+            div.innerHTML += args.inputs[v].label
+         else
+            div.innerHTML += v
+         if (args.inputs[v].type != '')
+            div.innerHTML += ' ('+args.inputs[v].type+')'
+         div.setAttribute('id',JSON.stringify({id:idnumber,type:'inputs',name:v}))
+         div.addEventListener('mouseover',input_over)
+         div.addEventListener('mouseout',input_out)
+         div.addEventListener('mousedown',input_mousedown)
+         div.addEventListener('touchstart',input_touchdown)
+         div.dataset.links = JSON.stringify([])
+         div.dataset.name = v
+         divin.appendChild(div)
+         div.dataset.id = JSON.stringify(
+            {id:idnumber,type:'input',name:v,
+            rnd:Math.random()}) // randomize for unique events
+         window.addEventListener(div.dataset.id,args.inputs[v].event)
+         }
+      container.appendChild(divin)
+      if ((Object.keys(args.inputs).length) == 0)
+         divin.style.visibility = 'hidden'
+      divin.style.left = divname.clientWidth/2
+         -divint.clientWidth/2-divin.clientWidth
+      for (var i = 1; i < divin.childNodes.length; ++i) {
+         divin.childNodes[i].dataset.dx = divin.offsetLeft
+            +divin.childNodes[i].offsetLeft
+         divin.childNodes[i].dataset.dy = divin.offsetTop
+            +divin.childNodes[i].offsetTop
+            +divin.childNodes[i].offsetHeight/2
+         }
+   //
+   // outputs
+   //
+   var divout = document.createElement('div')
+      divout.setAttribute('id',JSON.stringify({id:idnumber,type:'outputs'}))
+      var b = document.createElement('b')
+         b.appendChild(document.createTextNode('outputs'))
+      divout.appendChild(b)
+      divout.style.backgroundColor = "rgb(240,240,210)"
+      divout.style.padding = mods.ui.padding
+      divout.style.paddingRight = '2px'
+      divout.style.position = "absolute"
+      divout.style.top = divname.clientHeight+divctrl.clientHeight
+      divout.style.textAlign = 'right'
+      divout.addEventListener('mousedown',nothing)
+      divout.style.border = '2px solid'
+      divout.style.borderRadius = '10px'
+      divout.setAttribute('id',JSON.stringify({id:idnumber,type:'outputs'}))
+      divout.style.cursor = 'default'
+      divout.addEventListener('touchstart',nothing)
+      divout.addEventListener('mouseup',nothing)
+      divout.addEventListener('touchend',nothing)
+      for (var v in args.outputs) {
+         var div = document.createElement('div')
+         if (args.outputs[v].label != undefined)
+            div.innerHTML += args.outputs[v].label
+         else
+            div.innerHTML += v
+         if (args.outputs[v].type != '')
+            div.innerHTML += ' ('+args.outputs[v].type+')'
+         div.setAttribute('id',JSON.stringify({id:idnumber,type:'outputs',name:v}))
+         div.addEventListener('mouseover',output_over)
+         div.addEventListener('mouseout',output_out)
+         div.addEventListener('mousedown',output_mousedown)
+         div.addEventListener('touchstart',output_touchdown)
+         div.dataset.links = JSON.stringify([])
+         div.dataset.name = v
+         divout.appendChild(div)
+         div.dataset.id = JSON.stringify(
+            {id:idnumber,type:'output',name:v,
+            rnd:Math.random()}) // randomize for unique events
+         window.addEventListener(div.dataset.id,args.outputs[v].event)
+         }
+      container.appendChild(divout)
+      if ((Object.keys(args.outputs).length) == 0)
+         divout.style.visibility = 'hidden'
+      divout.style.left = divname.clientWidth/2
+         +divint.clientWidth/2
+      for (var i = 1; i < divout.childNodes.length; ++i) {
+         divout.childNodes[i].dataset.dx = divout.offsetLeft
+            +divout.childNodes[i].offsetLeft
+            +divout.childNodes[i].offsetWidth
+         divout.childNodes[i].dataset.dy = divout.offsetTop
+            +divout.childNodes[i].offsetTop
+            +divout.childNodes[i].offsetHeight/2
+         }
+      //
+      // initialization
+      //
+      args.init()
+      //
+      // resize to contents
+      //
+      container.style.width = divint.clientWidth+divin.clientWidth+divout.clientWidth
+      mods.fit(divint)
+      //
+      // return container
+      //
+      return(container)
+   }
+function delete_module(idnumber) {
+   //
+   // delete links
+   //
+   var ins = document.getElementById(
+      JSON.stringify({id:idnumber,type:'inputs'}))
+   var outs = document.getElementById(
+      JSON.stringify({id:idnumber,type:'outputs'}))
+   for (var i = 1; i < ins.childNodes.length; ++i) {
+      var links = JSON.parse(ins.childNodes[i].dataset.links)
+      for (var l in links)
+         delete_link(links[l])
+      }
+   for (var i = 1; i < outs.childNodes.length; ++i) {
+      var links = JSON.parse(outs.childNodes[i].dataset.links)
+      for (var l in links)
+         delete_link(links[l])
+      }
+   //
+   // delete container
+   //
+   var modules = document.getElementById('modules')
+   var container = document.getElementById(idnumber)
+   modules.removeChild(container)
+   //
+   // clear prompt
+   //
+   set_prompt('')
+   }
+function update_module_definition(id) {
+   //
+   // get definition
+   //
+   var module = document.getElementById(id)
+   var def = module.dataset.definition
+   //
+   // check for mod
+   //
+   if (mods.mod[id] == undefined)
+      return def
+   //
+   // split definition
+   //
+   var lines = def.split('\n')
+   //
+   // find init function
+   //
+   var line = 0
+   while (line < lines.length) {
+      if (lines[line].indexOf("var init") == 0)
+         break
+      line += 1
+      }
+   //
+   // read initializations up to inputs function
+   //
+   while (line < lines.length) {
+      if (lines[line].indexOf(".value =") != -1) {
+         var start = 4+lines[line].indexOf("mod.")
+         var end = lines[line].indexOf(".value")
+         var key = lines[line].slice(start,end)
+         var value = mods.mod[id][key]['value']
+         if (value.indexOf('\n') != -1)
+            value = value.replace(/\n/g,"\\n")
+         lines[line] = "   mod."+key+".value = '"+value+"'"
+         }
+      else if (lines[line].indexOf(".checked =") != -1) {
+         var start = 4+lines[line].indexOf("mod.")
+         var end = lines[line].indexOf(".checked")
+         var key = lines[line].slice(start,end)
+         var value = mods.mod[id][key]['checked']
+         lines[line] = "   mod."+key+".checked = "+value
+         }
+      if (lines[line].indexOf("var inputs") == 0)
+         break
+      line += 1
+      }
+   return(lines.join('\n'))
+   }
+function edit_module(evt) {
+   var mod = evt.target.parentNode.parentNode
+   var idnumber = mod.id
+   var def = update_module_definition(idnumber)
+   //
+   // open edit window
+   //
+   var top = mod.dataset.top
+   var left = mod.dataset.left
+   var name = mod.dataset.name
+   var filename = mod.dataset.filename
+   var fontsize = 100
+   var win = window.open('')
+   var file = document.createElement('input')
+      file.setAttribute('type','file')
+      file.setAttribute('id','edit_module_file')
+      file.style.position = 'absolute'
+      file.style.left = 0
+      file.style.top = 0
+      file.style.width = 0
+      file.style.height = 0
+      file.style.opacity = 0
+      file.addEventListener('change',function() {
+         edit_module_read_handler()
+         })
+      win.document.body.appendChild(file)
+   function edit_module_read_handler() {
+      var file = win.document.getElementById('edit_module_file')
+      var file_reader = new FileReader()
+      file_reader.onload = edit_module_load_handler
+      file_reader.readAsText(file.files[0])
+      }
+   function edit_module_load_handler(event) {
+      str = event.target.result
+      var text = win.document.getElementById('edit_module_text')
+      text.value = str
+      update_module(idnumber)
+      win.close()
+      }
+   if (filename != "undefined" && filename != "") {
+      var btn = document.createElement('button')
+         btn.appendChild(document.createTextNode('reload from server'))
+         btn.style.padding = mods.ui.padding
+         btn.style.margin = 1
+         btn.addEventListener('click',function(){
+            var req = new XMLHttpRequest()
+            req.responseType = 'text'
+            req.onreadystatechange = function() {
+               if (req.readyState == XMLHttpRequest.DONE) {
+                  text.value = req.response
+                  update_module(idnumber)
+                  }
+               }
+            req.open('GET',filename+'?rnd='+Math.random())
+            req.send()
+            win.close()
+            })
+         win.document.body.appendChild(btn)
+      }
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('load from file'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         var file = win.document.getElementById('edit_module_file')
+         file.value = null
+         file.click()
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('update and close'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         update_module(idnumber)
+         win.close()
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('update'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         update_module(idnumber)
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('close'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         win.close()
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('save'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         var a = document.createElement('a')
+         a.setAttribute('href','data:text/plain;charset=utf-8,'+
+            encodeURIComponent(text.value))
+         a.setAttribute('download',name)
+         a.style.display = 'none'
+         document.body.appendChild(a)
+         a.click()
+         document.body.removeChild(a)
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('increase font'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         fontsize *= 1.2
+         text.style.fontSize = fontsize+'%'
+         })
+      win.document.body.appendChild(btn)
+   var btn = document.createElement('button')
+      btn.appendChild(document.createTextNode('decrease font'))
+      btn.style.padding = mods.ui.padding
+      btn.style.margin = 1
+      btn.addEventListener('click',function(){
+         fontsize /= 1.2
+         text.style.fontSize = fontsize+'%'
+         })
+      win.document.body.appendChild(btn)
+   win.document.body.appendChild(document.createElement('br'))
+   var text = document.createElement('textarea')
+      text.setAttribute('id','edit_module_text')
+      text.style.width = '100%'
+      text.style.height= '100%'
+      text.value = def
+      win.document.body.appendChild(text)
+   function reload_module(idnumber) {
+      }
+   function update_module(idnumber) {
+      //
+      // save links
+      //
+      var ins = document.getElementById(
+         JSON.stringify({id:idnumber,type:'inputs'}))
+      var inlinks = []
+      for (var i = 1; i < ins.childNodes.length; ++i) {
+         var links = JSON.parse(ins.childNodes[i].dataset.links)
+         for (var l in links)
+            inlinks.push(links[l])
+         }
+      var outs = document.getElementById(
+         JSON.stringify({id:idnumber,type:'outputs'}))
+      var outlinks = []
+      for (var i = 1; i < outs.childNodes.length; ++i) {
+         var links = JSON.parse(outs.childNodes[i].dataset.links)
+         for (var l in links)
+            outlinks.push(links[l])
+         }
+      //
+      // delete module
+      //
+      delete_module(idnumber)
+      //
+      // add module
+      //
+      var def = text.value
+      try {
+         eval('var args = '+def)
+         }
+      catch (err) {
+         console.log(err.message)
+         return
+         }
+      args.definition = def
+      args.id = idnumber
+      args.top = top
+      args.left = left
+      args.filename = filename
+      add_module(args)
+      //
+      // add links
+      //
+      for (var l in inlinks) {
+         eval('var link = '+inlinks[l])
+         eval('var linksrc = '+link.source)
+         eval('var linkdst = '+link.dest)
+         var src = document.getElementById(
+            JSON.stringify(
+               {id:linksrc.id,type:linksrc.type,name:linksrc.name}))
+         var dst = document.getElementById(
+            JSON.stringify(
+               {id:linkdst.id,type:linkdst.type,name:linkdst.name}))
+         add_link(src,dst)
+         }
+      for (var l in outlinks) {
+         eval('var link = '+outlinks[l])
+         eval('var linksrc = '+link.source)
+         eval('var linkdst = '+link.dest)
+         var src = document.getElementById(
+            JSON.stringify(
+               {id:linksrc.id,type:linksrc.type,name:linksrc.name}))
+         var dst = document.getElementById(
+            JSON.stringify(
+               {id:linkdst.id,type:linkdst.type,name:linkdst.name}))
+         add_link(src,dst)
+         }
+      }
+   }
+//
+// UI routines
+//
+function set_prompt(txt) {
+   var span = document.getElementById('prompt')
+   span.childNodes[0].innerHTML = ' '+txt
+   }
+function get_prompt(txt,fn) {
+   var div = document.getElementById('prompt')
+   if (div.childNodes.length > 2)
+      //
+      // already getting a prompt
+      //
+      return
+   var text = document.createElement('input')
+      text.type = 'text'
+      text.size = 20
+      text.value = txt
+      text.addEventListener('keydown',function(evt){
+         if (evt.key == 'Enter') {
+            var div = document.getElementById('prompt')
+            div.removeChild(div.childNodes[1])
+            div.removeChild(div.childNodes[1])
+            set_prompt('')
+            fn(text.value)
+            }
+         })
+      div.appendChild(text)
+      div.appendChild(document.createTextNode(' (enter)'))
+      text.focus()
+   }
+function nothing(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   }
+//
+// link routines
+//
+mods.add_link = function(src,dst) {
+   add_link(src,dst)
+   }
+function add_link(src,dst) {
+   //
+   // link order from out to in
+   //
+   if (src.id.indexOf('outputs') == -1) {
+      var tmp = src
+      src = dst
+      dst = tmp
+      }
+   //
+   // check if link exists
+   //
+   var id = JSON.stringify({source:src.id,dest:dst.id})
+   var link = document.getElementById(id)
+   if (link != null) {
+      //
+      // yes, remove it and return
+      //
+      delete_link(id)
+      return
+      }
+   //
+   // no, add link
+   //
+   var links = JSON.parse(src.dataset.links)
+      links.push(id)
+      src.dataset.links = JSON.stringify(links)
+   var links = JSON.parse(dst.dataset.links)
+      links.push(id)
+      dst.dataset.links = JSON.stringify(links)
+   //
+   // draw link
+   //
+   xsrc = src.parentNode.parentNode.offsetLeft
+      +parseFloat(src.dataset.dx)
+   ysrc = src.parentNode.parentNode.offsetTop
+      +parseFloat(src.dataset.dy)
+      -mods.ui.header
+   xdst = dst.parentNode.parentNode.offsetLeft
+      +parseFloat(dst.dataset.dx)
+   ydst = dst.parentNode.parentNode.offsetTop
+      +parseFloat(dst.dataset.dy)
+      -mods.ui.header
+   var links = document.getElementById('links')
+   var path = document.createElementNS('http://www.w3.org/2000/svg','path')
+      path.setAttribute('id',id)
+      path.setAttribute('d','M'+xsrc+','+ysrc+' C'+(xsrc+mods.ui.bezier)+','
+         +ysrc+' '+(xdst-mods.ui.bezier)+','+ydst+' '+xdst+','+ydst)
+      path.setAttribute('fill','none')
+      path.setAttribute('stroke','rgb(0,0,128)')
+      path.setAttribute('stroke-width',3)
+      links.appendChild(path)
+   /*
+   //
+   // don't trigger link
+   //
+   eval('var evtid = '+src.id)
+   evtid.type = 'output'
+   var evtstr = JSON.stringify(evtid)
+   var evt = new CustomEvent(evtstr)
+   window.dispatchEvent(evt)
+   */
+   }
+function delete_link(linkid) {
+   //
+   // delete a link
+   //
+   var links = document.getElementById('links')
+   links.removeChild(document.getElementById(linkid))
+   link = JSON.parse(linkid)
+   src = document.getElementById(link.source)
+   dst = document.getElementById(link.dest)
+   var links = JSON.parse(src.dataset.links)
+      var index = links.indexOf(linkid)
+      links.splice(index,1)
+      src.dataset.links = JSON.stringify(links)
+   var links = JSON.parse(dst.dataset.links)
+      var index = links.indexOf(linkid)
+      links.splice(index,1)
+      dst.dataset.links = JSON.stringify(links)
+   }
+function draw_links(idnumber,color) {
+   //
+   // draw a module's links
+   //
+   var ins = document.getElementById(
+      JSON.stringify({id:idnumber,type:'inputs'}))
+   var outs = document.getElementById(
+      JSON.stringify({id:idnumber,type:'outputs'}))
+   for (var i = 1; i < ins.childNodes.length; ++i) {
+      var links = JSON.parse(ins.childNodes[i].dataset.links)
+      for (var l in links)
+         draw_link(links[l],color)
+      }
+   for (var i = 1; i < outs.childNodes.length; ++i) {
+      var links = JSON.parse(outs.childNodes[i].dataset.links)
+      for (var l in links)
+         draw_link(links[l],color)
+      }
+   }
+function draw_link(id,color) {
+   //
+   // draw a link
+   //
+   var link = JSON.parse(id)
+   src = document.getElementById(link.source)
+   dst = document.getElementById(link.dest)
+   var path = document.getElementById(id)
+   xsrc = src.parentNode.parentNode.offsetLeft
+      +parseFloat(src.dataset.dx)
+   ysrc = src.parentNode.parentNode.offsetTop
+      +parseFloat(src.dataset.dy)
+      -mods.ui.header
+   xdst = dst.parentNode.parentNode.offsetLeft
+      +parseFloat(dst.dataset.dx)
+   ydst = dst.parentNode.parentNode.offsetTop
+      +parseFloat(dst.dataset.dy)
+      -mods.ui.header
+   path.setAttribute('d','M'+xsrc+','+ysrc+' C'+(xsrc+mods.ui.bezier)+','
+      +ysrc+' '+(xdst-mods.ui.bezier)+','+ydst+' '+xdst+','+ydst)
+   path.setAttribute('stroke',color)
+   }
+//
+// mods routines to be called from modules
+//
+mods.fit = function(div) {
+   //
+   // fit a module
+   //
+   div.style.left = div.dataset.divNameSize/2-div.clientWidth/2
+   var divin = document.getElementById(
+      JSON.stringify(
+         {id:div.dataset.id,type:'inputs'}))
+   divin.style.left = div.dataset.divNameSize/2-div.clientWidth/2-divin.clientWidth
+   var divout = document.getElementById(
+      JSON.stringify(
+         {id:div.dataset.id,type:'outputs'}))
+   divout.style.left = div.dataset.divNameSize/2+div.clientWidth/2
+   }
+mods.output = function(mod,varname,val) {
+   //
+   // send module outputs
+   //
+   var div = mod.div
+   var key = JSON.parse(div.id)
+   var idnumber = key.id
+   var out = document.getElementById(
+      JSON.stringify(
+         {id:idnumber,type:'outputs',name:varname}))
+   var links = JSON.parse(out.dataset.links)
+   for (var l in links) {
+      var link = JSON.parse(links[l])
+      var dest = JSON.parse(link.dest)
+      var divin = document.getElementById(JSON.stringify(
+         {id:dest.id,type:'inputs',name:dest.name}))
+      var evt = new CustomEvent(divin.dataset.id,{detail:val})
+      window.dispatchEvent(evt)
+      }
+   }
+//
+// module mod-ification calls
+//
+mods.module_create = function(args) {
+   var event = {target:{result:args}}
+   var div = mod_load_handler(event)
+   return(div)
+   }
+mods.module_delete = function(id) {
+   delete_module(id)
+   }
+mods.module_id = function(div) {
+   return div.parentNode.id
+   }
+mods.module_left = function(id) {
+   var module = document.getElementById(id)
+   return (parseInt(module.style.left))
+   }
+mods.module_move = function(id,dx,dy) {
+   var module = document.getElementById(id)
+   var top = parseInt(module.style.top)
+   module.style.top = top+dy
+   module.dataset.top = top+dy
+   var left = parseInt(module.style.left)
+   module.style.left = left+dx
+   module.dataset.left = left+dx
+   draw_links(id,mods.ui.link_color)
+   }
+mods.module_inputs = function(id,index) {
+   var module = document.getElementById(id)
+   var inputs = document.getElementById(
+      JSON.stringify({id:id,type:'inputs'}))
+   console.log(inputs.childNodes[index])
+   }
+mods.module_outputs = function(id,index) {
+   var module = document.getElementById(id)
+   var outputs = document.getElementById(
+      JSON.stringify({id:id,type:'outputs'}))
+   console.log(outputs.childNodes[index])
+   }
+mods.module_position = function(id,x,y) {
+   var module = document.getElementById(id)
+   var top = parseInt(module.style.top)
+   module.style.top = y
+   module.dataset.top = y
+   var left = parseInt(module.style.left)
+   module.style.left = x
+   module.dataset.left = x
+   draw_links(id,mods.ui.link_color)
+   }
+mods.module_top = function(id) {
+   var module = document.getElementById(id)
+   return (parseInt(module.style.top))
+   }
+mods.module_width = function(id) {
+   var module = document.getElementById(id)
+   return (parseInt(module.clientWidth))
+   }
+//
+// input event handlers
+//
+function input_over(evt) {
+   evt.target.style.fontWeight = 'bold'
+   var links = JSON.parse(evt.target.dataset.links)
+   for (var l in links)
+      draw_link(links[l],mods.ui.link_highlight)
+   if (mods.ui.source == null)
+      set_prompt('click to link')
+   }
+function input_out(evt) {
+   evt.target.style.fontWeight = 'normal'
+   var links = JSON.parse(evt.target.dataset.links)
+   for (var l in links)
+      draw_link(links[l],mods.ui.link_color)
+   if (mods.ui.source == null)
+      set_prompt('')
+   }
+function input_mousedown(evt) {
+   if (mods.ui.source == null) {
+      mods.ui.source = evt.target
+      set_prompt('variable to link/unlink to?')
+      }
+   else {
+      add_link(mods.ui.source,evt.target)
+      set_prompt('')
+      mods.ui.source = null
+      }
+   }
+function input_touchdown(evt) {
+   if (mods.ui.source == null) {
+      mods.ui.source = evt.target
+      set_prompt('variable to link/unlink to?')
+      }
+   else {
+      add_link(mods.ui.source,evt.target)
+      set_prompt('')
+      mods.ui.source = null
+      }
+   }
+//
+// output event handlers
+//
+function output_over(evt) {
+   evt.target.style.fontWeight = 'bold'
+   var links = JSON.parse(evt.target.dataset.links)
+   for (var l in links)
+      draw_link(links[l],mods.ui.link_highlight)
+   if (mods.ui.source == null)
+      set_prompt('click to link')
+   }
+function output_out(evt) {
+   evt.target.style.fontWeight = 'normal'
+   var links = JSON.parse(evt.target.dataset.links)
+   for (var l in links)
+      draw_link(links[l],mods.ui.link_color)
+   if (mods.ui.source == null)
+      set_prompt('')
+   }
+function output_mousedown(evt) {
+   if (mods.ui.source == null) {
+      mods.ui.source = evt.target
+      set_prompt('variable to link/unlink to?')
+      }
+   else {
+      add_link(mods.ui.source,evt.target)
+      set_prompt('')
+      mods.ui.source = null
+      }
+   }
+function output_touchdown(evt) {
+   if (mods.ui.source == null) {
+      mods.ui.source = evt.target
+      set_prompt('variable to link/unlink to?')
+      }
+   else {
+      add_link(mods.ui.source,evt.target)
+      set_prompt('')
+      mods.ui.source = null
+      }
+   }
+//
+// name event handlers
+//
+function name_over(evt) {
+   evt.target.style.fontWeight = 'bold'
+   if (mods.ui.source == null)
+      set_prompt('click and drag to move')
+   }
+function name_out(evt) {
+   evt.target.style.fontWeight = 'normal'
+   if (mods.ui.source == null)
+      set_prompt('')
+   }
+function name_mousedown(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var div = document.getElementById(evt.target.parentNode.id)
+      div.style.zIndex = 1
+      mods.ui.xstart = evt.clientX
+      mods.ui.ystart = evt.clientY
+      mods.ui.selected[evt.target.parentNode.id] = true
+      window.addEventListener('mousemove',name_mousemove)
+      window.addEventListener('mouseup',name_mouseup)
+   }
+function name_mousemove(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var t = mods_transform()
+   for (var id in mods.ui.selected) {
+      var div = document.getElementById(id)
+         var dx = (evt.clientX-mods.ui.xstart)/t.s
+         var dy = (evt.clientY-mods.ui.ystart)/t.s
+         var newleft = parseFloat(div.dataset.left)+dx
+         var newtop = parseFloat(div.dataset.top)+dy
+         div.style.left = newleft+'px'
+         div.style.top = newtop+'px'
+      draw_links(id,mods.ui.link_color)
+      }
+   }
+function name_mouseup(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var t = mods_transform()
+   for (var id in mods.ui.selected) {
+      var div = document.getElementById(id)
+         div.style.zIndex = 0
+         div.childNodes[0].style.fontWeight = 'normal'
+         var dx = (evt.clientX-mods.ui.xstart)/t.s
+         var dy = (evt.clientY-mods.ui.ystart)/t.s
+         div.dataset.left = parseFloat(div.dataset.left)+dx
+         div.dataset.top = parseFloat(div.dataset.top)+dy
+         window.removeEventListener('mousemove',name_mousemove)
+         window.removeEventListener('mouseup',name_mouseup)
+      }
+   mods.ui.selected = {}
+   }
+function name_touchdown(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var div = document.getElementById(evt.target.parentNode.id)
+      div.style.zIndex = 1
+      mods.ui.xstart = evt.changedTouches[0].pageX
+      mods.ui.ystart = evt.changedTouches[0].pageY
+      mods.ui.selected[evt.target.parentNode.id] = true
+      window.addEventListener('touchmove',name_touchmove)
+      window.addEventListener('touchend',name_touchup)
+   }
+function name_touchmove(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var t = mods_transform()
+   for (var id in mods.ui.selected) {
+      var div = document.getElementById(id)
+         var dx = (evt.changedTouches[0].pageX-mods.ui.xstart)/t.s
+         var dy = (evt.changedTouches[0].pageY-mods.ui.ystart)/t.s
+         var newleft = parseFloat(div.dataset.left)+dx
+         var newtop = parseFloat(div.dataset.top)+dy
+         div.style.left = newleft+'px'
+         div.style.top = newtop+'px'
+      draw_links(id,mods.ui.link_color)
+      }
+   }
+function name_touchup(evt) {
+   evt.preventDefault()
+   evt.stopPropagation()
+   var t = mods_transform()
+   for (var id in mods.ui.selected) {
+      var div = document.getElementById(id)
+         div.style.zIndex = 0
+         var dx = (evt.changedTouches[0].pageX-mods.ui.xstart)/t.s
+         var dy = (evt.changedTouches[0].pageY-mods.ui.ystart)/t.s
+         div.dataset.left = parseFloat(div.dataset.left)+dx
+         div.dataset.top = parseFloat(div.dataset.top)+dy
+         window.removeEventListener('touchmove',name_touchmove)
+         window.removeEventListener('touchend',name_touchup)
+      }
+   mods.ui.selected = {}
+   }
+})()
+var prog = JSON.parse(JSON.stringify({"modules":{"0.47383876715576023":{"definition":"//\n// distance transform \n//    assumes thresholded image, with zero intensity exterior\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'distance transform'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         distance_transform()}}}\n//\n// outputs\n//\nvar outputs = {\n   distances:{type:'F32',\n      event:function(){\n         mod.distances.height = mod.input.height\n         mod.distances.width = mod.input.width\n         mods.output(mod,'distances',mod.distances)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   div.appendChild(document.createElement('br'))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// distance transform function\n//\nfunction distance_transform() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      mod.distances = new Float32Array(evt.data.buffer)\n      var imgbuf = new Uint8ClampedArray(h*w*4)\n      var dmax = -Number.MAX_VALUE\n      for (var y = 0; y < h; ++y) {\n         for (var x = 0; x < w; ++x) {\n            if (mod.distances[(h-1-y)*w+x] > dmax)\n               dmax = mod.distances[(h-1-y)*w+x]\n            }\n         }\n      var i\n      for (var y = 0; y < h; ++y) {\n         for (var x = 0; x < w; ++x) {\n            i = 255*mod.distances[(h-1-y)*w+x]/dmax\n            imgbuf[(h-1-y)*w*4+x*4+0] = i\n            imgbuf[(h-1-y)*w*4+x*4+1] = i\n            imgbuf[(h-1-y)*w*4+x*4+2] = i\n            imgbuf[(h-1-y)*w*4+x*4+3] = 255\n            }\n         }\n      var imgdata = new ImageData(imgbuf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.distances.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var ctx = mod.img.getContext(\"2d\")\n   ctx.putImageData(mod.input,0,0)\n   var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,\n      buffer:img.data.buffer},\n      [img.data.buffer])\n   }\n//\n// distance transform worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var ny = evt.data.height\n      var nx = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Float32Array(nx*ny)\n      function distance(g,x,y,i) {\n         return ((y-i)*(y-i)+g[i][x]*g[i][x])\n         }\n      function intersection(g,x,y0,y1) {\n         return ((g[y0][x]*g[y0][x]-g[y1][x]*g[y1][x]+y0*y0-y1*y1)/(2.0*(y0-y1)))\n         }\n      //\n      // allocate arrays\n      //\n      var g = []\n      for (var y = 0; y < ny; ++y)\n         g[y] = new Uint32Array(nx)\n      var h = []\n      for (var y = 0; y < ny; ++y)\n         h[y] = new Uint32Array(nx)\n      var distances = []\n      for (var y = 0; y < ny; ++y)\n         distances[y] = new Uint32Array(nx)\n      var starts = new Uint32Array(ny)\n      var minimums = new Uint32Array(ny)\n      var d\n      //\n      // column scan\n      //  \n      for (var y = 0; y < ny; ++y) {\n         //\n         // right pass\n         //\n         var closest = -nx\n         for (var x = 0; x < nx; ++x) {\n            if (input[(ny-1-y)*nx*4+x*4+0] != 0) {\n               g[y][x] = 0\n               closest = x\n               }\n            else\n               g[y][x] = (x-closest)\n            }\n         //\n         // left pass\n         //\n         closest = 2*nx\n         for (var x = (nx-1); x >= 0; --x) {\n            if (input[(ny-1-y)*nx*4+x*4+0] != 0)\n               closest = x\n            else {\n               d = (closest-x)\n               if (d < g[y][x])\n                  g[y][x] = d\n               }\n            }\n         }\n      //\n      // row scan\n      //\n      for (var x = 0; x < nx; ++x) {\n         var segment = 0\n         starts[0] = 0\n         minimums[0] = 0\n         //\n         // down \n         //\n         for (var y = 1; y < ny; ++y) {\n            while ((segment >= 0) &&\n               (distance(g,x,starts[segment],minimums[segment]) > distance(g,x,starts[segment],y)))\n               segment -= 1\n            if (segment < 0) {\n               segment = 0\n               minimums[0] = y\n               }\n            else {\n               newstart = 1+intersection(g,x,minimums[segment],y)\n               if (newstart < ny) {\n                  segment += 1\n                  minimums[segment] = y\n                  starts[segment] = newstart\n                  }\n               }\n            }\n         //\n         // up \n         //\n         for (var y = (ny-1); y >= 0; --y) {\n            d = Math.sqrt(distance(g,x,y,minimums[segment]))\n            output[(ny-1-y)*nx+x] = d\n            if (y == starts[segment])\n               segment -= 1\n            }\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"457.58350726962306","left":"3676.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.07944144280928633":{"definition":"//\n// edge detect\n//    green = interior, blue = exterior, red = boundary\n//    assumes input is thresholded\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'edge detect'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         edge_detect()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('green:interior, blue:exterior, red:boundary'))\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// edge detect\n//\nfunction edge_detect() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   webworker.postMessage({worker:worker.toString(),\n      height:mod.input.height,width:mod.input.width,\n      buffer:mod.input.data.buffer},\n      [mod.input.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Uint8ClampedArray(h*w*4)\n      var i00,i0m,i0p,im0,ip0,imm,imp,ipm,ipp,row,col\n      //\n      // find edges - interior\n      //\n      for (row = 1; row < (h-1); ++row) {\n         for (col = 1; col < (w-1); ++col) {\n            i00 = (input[(h-1-row)*w*4+col*4+0] \n                      +input[(h-1-row)*w*4+col*4+1] \n                      +input[(h-1-row)*w*4+col*4+2])\n            i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                      +input[(h-1-row)*w*4+(col+1)*4+1] \n                      +input[(h-1-row)*w*4+(col+1)*4+2])\n            ip0 = (input[(h-2-row)*w*4+col*4+0] \n                      +input[(h-2-row)*w*4+col*4+1] \n                      +input[(h-2-row)*w*4+col*4+2])\n            ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                      +input[(h-2-row)*w*4+(col+1)*4+1] \n                      +input[(h-2-row)*w*4+(col+1)*4+2])\n            i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                      +input[(h-1-row)*w*4+(col-1)*4+1] \n                      +input[(h-1-row)*w*4+(col-1)*4+2])\n            im0 = (input[(h-row)*w*4+col*4+0] \n                      +input[(h-row)*w*4+col*4+1] \n                      +input[(h-row)*w*4+col*4+2])\n            imm = (input[(h-row)*w*4+(col-1)*4+0] \n                      +input[(h-row)*w*4+(col-1)*4+1] \n                      +input[(h-row)*w*4+(col-1)*4+2])\n            imp = (input[(h-row)*w*4+(col+1)*4+0] \n                      +input[(h-row)*w*4+(col+1)*4+1] \n                      +input[(h-row)*w*4+(col+1)*4+2])\n            ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                      +input[(h-2-row)*w*4+(col-1)*4+1] \n                      +input[(h-2-row)*w*4+(col-1)*4+2])\n            if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp) \n               || (i00 != i0m) || (i00 != im0) || (i00 != imm)\n               || (i00 != imp) || (i00 != ipm)) {\n               output[(h-1-row)*w*4+col*4+0] = 255\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else if (i00 == 0) {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 255\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 255\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      //\n      // left and right edges\n      //\n      for (row = 1; row < (h-1); ++row) {\n         col = w-1\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         imm = (input[(h-row)*w*4+(col-1)*4+0] \n                   +input[(h-row)*w*4+(col-1)*4+1] \n                   +input[(h-row)*w*4+(col-1)*4+2])\n         ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                   +input[(h-2-row)*w*4+(col-1)*4+1] \n                   +input[(h-2-row)*w*4+(col-1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n        if ((i00 != i0m) || (i00 != ip0) || (i00 != ipm) \n           || (i00 != im0) || (i00 != imm)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         col = 0\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         imp = (input[(h-row)*w*4+(col+1)*4+0] \n                   +input[(h-row)*w*4+(col+1)*4+1] \n                   +input[(h-row)*w*4+(col+1)*4+2])\n         ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                   +input[(h-2-row)*w*4+(col+1)*4+1] \n                   +input[(h-2-row)*w*4+(col+1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n        if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp) \n           || (i00 != im0) || (i00 != imp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         }\n      //\n      // top and bottom edges\n      //\n      for (col = 1; col < (w-1); ++col) {\n         row = h-1\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         imm = (input[(h-row)*w*4+(col-1)*4+0] \n                   +input[(h-row)*w*4+(col-1)*4+1] \n                   +input[(h-row)*w*4+(col-1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         imp = (input[(h-row)*w*4+(col+1)*4+0] \n                   +input[(h-row)*w*4+(col+1)*4+1] \n                   +input[(h-row)*w*4+(col+1)*4+2])\n        if ((i00 != i0m) || (i00 != i0p) || (i00 != imm) \n           || (i00 != im0) || (i00 != imp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         row = 0\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                   +input[(h-2-row)*w*4+(col-1)*4+1] \n                   +input[(h-2-row)*w*4+(col-1)*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n         ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                   +input[(h-2-row)*w*4+(col+1)*4+1] \n                   +input[(h-2-row)*w*4+(col+1)*4+2])\n        if ((i00 != i0m) || (i00 != i0p) || (i00 != ipm) \n           || (i00 != ip0) || (i00 != ipp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         }\n      //\n      // corners\n      //\n      row = 0\n      col = 0\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                +input[(h-1-row)*w*4+(col+1)*4+1] \n                +input[(h-1-row)*w*4+(col+1)*4+2])\n      ip0 = (input[(h-2-row)*w*4+col*4+0] \n                +input[(h-2-row)*w*4+col*4+1] \n                +input[(h-2-row)*w*4+col*4+2])\n      ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                +input[(h-2-row)*w*4+(col+1)*4+1] \n                +input[(h-2-row)*w*4+(col+1)*4+2])\n      if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = 0\n      col = w-1\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                +input[(h-1-row)*w*4+(col-1)*4+1] \n                +input[(h-1-row)*w*4+(col-1)*4+2])\n      ip0 = (input[(h-2-row)*w*4+col*4+0] \n                +input[(h-2-row)*w*4+col*4+1] \n                +input[(h-2-row)*w*4+col*4+2])\n      ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                +input[(h-2-row)*w*4+(col-1)*4+1] \n                +input[(h-2-row)*w*4+(col-1)*4+2])\n      if ((i00 != i0m) || (i00 != ip0) || (i00 != ipm)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = h-1\n      col = 0\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                +input[(h-1-row)*w*4+(col+1)*4+1] \n                +input[(h-1-row)*w*4+(col+1)*4+2])\n      im0 = (input[(h-row)*w*4+col*4+0] \n                +input[(h-row)*w*4+col*4+1] \n                +input[(h-row)*w*4+col*4+2])\n      imp = (input[(h-row)*w*4+(col+1)*4+0] \n                +input[(h-row)*w*4+(col+1)*4+1] \n                +input[(h-row)*w*4+(col+1)*4+2])\n      if ((i00 != i0p) || (i00 != im0) || (i00 != imp)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = h-1\n      col = w-1\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                +input[(h-1-row)*w*4+(col-1)*4+1] \n                +input[(h-1-row)*w*4+(col-1)*4+2])\n      im0 = (input[(h-row)*w*4+col*4+0] \n                +input[(h-row)*w*4+col*4+1] \n                +input[(h-row)*w*4+col*4+2])\n      imm = (input[(h-row)*w*4+(col-1)*4+0] \n                +input[(h-row)*w*4+(col-1)*4+1] \n                +input[(h-row)*w*4+(col-1)*4+2])\n      if ((i00 != i0m) || (i00 != im0) || (i00 != imm)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1074.583507269623","left":"4134.994408259125","filename":"undefined","inputs":{},"outputs":{}},"0.8903773266711255":{"definition":"//\n// orient edges\n//    input is green:interior, blue:exterior, red:boundary\n//    output is red 128:north,64:south, green 128:east,64:west, blue 128:start,64:stop\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'orient edges'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         var ctx = mod.display.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         orient_edges()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // off-screen display canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.display = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('red:north, dark red:south'))\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('green:east, dark green:west'))\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('blue:start, dark blue:stop'))\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.display,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// orient edges\n//\nfunction orient_edges() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      var disp = new Uint8ClampedArray(evt.data.display)\n      var dispdata = new ImageData(disp,w,h)\n      var ctx = mod.display.getContext(\"2d\")\n      ctx.putImageData(dispdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var w = mod.canvas.width\n      var h = mod.canvas.height\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,w,h)\n      ctx.drawImage(mod.display,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,\n      buffer:mod.input.data.buffer},\n      [mod.input.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Uint8ClampedArray(h*w*4)\n      var row,col\n      var boundary = 0\n      var interior = 1\n      var exterior = 2\n      var alpha = 3\n      var northsouth = 0\n      var north = 128\n      var south = 64\n      var eastwest = 1\n      var east = 128\n      var west = 64\n      var startstop = 2\n      var start = 128\n      var stop = 64\n      //\n      // orient body states\n      //\n      for (row = 1; row < (h-1); ++row) {\n         for (col = 1; col < (w-1); ++col) {\n            output[(h-1-row)*w*4+col*4+northsouth] = 0\n            output[(h-1-row)*w*4+col*4+eastwest] = 0\n            output[(h-1-row)*w*4+col*4+startstop] = 0\n            output[(h-1-row)*w*4+col*4+alpha] = 255\n            if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n               if ((input[(h-1-(row+1))*w*4+(col)*4+boundary] != 0)\n                  && ((input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)\n                  || (input[(h-1-(row+1))*w*4+(col+1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+northsouth] |= north\n               if ((input[(h-1-(row-1))*w*4+(col)*4+boundary] != 0)\n                  && ((input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)\n                  || (input[(h-1-(row-1))*w*4+(col-1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+northsouth] |= south\n               if ((input[(h-1-(row))*w*4+(col+1)*4+boundary] != 0)\n                  && ((input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)\n                  || (input[(h-1-(row-1))*w*4+(col+1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+eastwest] |= east\n               if ((input[(h-1-(row))*w*4+(col-1)*4+boundary] != 0)\n                  && ((input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)\n                  || (input[(h-1-(row+1))*w*4+(col-1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+eastwest] |= west\n               }\n            }\n         }\n      //\n      // orient edge states\n      //\n      for (col = 1; col < (w-1); ++col) {\n         row = 0\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if ((input[(h-1-(row+1))*w*4+(col)*4+boundary] != 0)\n               && (input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+northsouth] |= north\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            if (input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            }\n         row = h-1\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if (input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            if ((input[(h-1-(row-1))*w*4+(col)*4+boundary] != 0)\n               && (input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+northsouth] |= south\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            }\n         }\n      for (row = 1; row < (h-1); ++row) {\n         col = 0\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if ((input[(h-1-(row))*w*4+(col+1)*4+boundary] != 0)\n               && (input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+eastwest] |= east\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            if (input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            }\n         col = w-1\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if (input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            if ((input[(h-1-(row))*w*4+(col-1)*4+boundary] != 0)\n               && (input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+eastwest] |= west\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            }\n         }\n      //\n      // orient corner states (todo)\n      //\n      row = 0\n      col = 0\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = h-1\n      col = 0\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = 0\n      col = w-1\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = h-1\n      col = w-1\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      //\n      // invert background for display\n      //\n      var display = new Uint8ClampedArray(h*w*4)\n      var r,g,b,i\n      for (row = 0; row < h; ++row) {\n         for (col = 0; col < w; ++col) {\n            r = output[(h-1-row)*w*4+col*4+0]\n            g = output[(h-1-row)*w*4+col*4+1]\n            b = output[(h-1-row)*w*4+col*4+2]\n            i = r+g+b\n            if (i != 0) {            \n               display[(h-1-row)*w*4+col*4+0] = output[(h-1-row)*w*4+col*4+0]\n               display[(h-1-row)*w*4+col*4+1] = output[(h-1-row)*w*4+col*4+1]\n               display[(h-1-row)*w*4+col*4+2] = output[(h-1-row)*w*4+col*4+2]\n               display[(h-1-row)*w*4+col*4+3] = output[(h-1-row)*w*4+col*4+3]\n               }\n            else {\n               display[(h-1-row)*w*4+col*4+0] = 255\n               display[(h-1-row)*w*4+col*4+1] = 255\n               display[(h-1-row)*w*4+col*4+2] = 255\n               display[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      //\n      // return output\n      //\n      self.postMessage({buffer:output.buffer,display:display.buffer},[output.buffer,display.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"944.5835072696229","left":"3703.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.3135579179893032":{"definition":"//\n// distance transform \n//    assumes thresholded image, with zero intensity exterior\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'offset'\n//\n// initialization\n//\nvar init = function() {\n   mod.offset.value = ''\n   }\n//\n// inputs\n//\nvar inputs = {\n   distances:{type:'F32',\n      event:function(evt){\n         mod.distances = evt.detail\n         var h = mod.distances.height\n         var w = mod.distances.width\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.height = mod.distances.height \n         ctx.canvas.width = mod.distances.width\n         if (mod.offset.value != '')\n            offset()\n         }},\n   offset:{type:'number',\n      event:function(evt){\n         mod.offset.value = evt.detail\n         offset()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // offset value\n   //\n   div.appendChild(document.createTextNode('offset (pixels): '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         offset()\n         })\n      div.appendChild(input)\n      mod.offset = input\n   //\n   // view button\n   //\n   div.appendChild(document.createElement('br'))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// offset\n//\nfunction offset() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.distances.height\n      var w = mod.distances.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var offset = parseFloat(mod.offset.value)\n   webworker.postMessage({\n      height:mod.distances.height,width:mod.distances.width,\n      offset:offset,buffer:mod.distances.buffer})\n   }\n//\n// offset worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var offset = evt.data.offset\n      var input = new Float32Array(evt.data.buffer)\n      var output = new Uint8ClampedArray(4*h*w)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            if (input[(h-1-row)*w+col] <= offset) {\n               output[(h-1-row)*w*4+col*4+0] = 255\n               output[(h-1-row)*w*4+col*4+1] = 255\n               output[(h-1-row)*w*4+col*4+2] = 255\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"557.583507269623","left":"4135.994408259125","filename":"undefined","inputs":{},"outputs":{}},"0.6488303557466412":{"definition":"//\n// image threshold\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'image threshold'\n//\n// initialization\n//\nvar init = function() {\n   mod.threshold.value = 0.5\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         threshold_image()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // threshold value\n   //\n   div.appendChild(document.createTextNode('threshold (0-1): '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         threshold_image()\n         })\n      div.appendChild(input)\n      mod.threshold = input\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// threshold image\n//\nfunction threshold_image() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var t = parseFloat(mod.threshold.value)\n   var ctx = mod.img.getContext(\"2d\")\n   ctx.putImageData(mod.input,0,0)\n   var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,threshold:t,\n      buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var t = evt.data.threshold\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var r,g,b,a,i\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            r = buf[(h-1-row)*w*4+col*4+0] \n            g = buf[(h-1-row)*w*4+col*4+1] \n            b = buf[(h-1-row)*w*4+col*4+2] \n            a = buf[(h-1-row)*w*4+col*4+3] \n            i = (r+g+b)/(3*255)\n            if (a == 0)\n               val = 255\n            else if (i > t)\n               var val = 255\n            else\n               var val = 0\n            buf[(h-1-row)*w*4+col*4+0] = val\n            buf[(h-1-row)*w*4+col*4+1] = val\n            buf[(h-1-row)*w*4+col*4+2] = val\n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"590.583507269623","left":"3164.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.2892270043957246":{"definition":"//\n// view toolpath\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// todo:\n//    erase and update new path\n//    show depth info\n//    show size\n//    calculate camera far\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'view toolpath'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   toolpath:{type:'object',\n      event:function(evt){\n         mod.path = evt.detail.path\n         mod.name = evt.detail.name\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         mod.depth = evt.detail.depth\n         show_path_info()\n         show_path()\n         outputs.toolpath.event()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   toolpath:{type:'object',\n      event:function(){\n         cmd = {}\n         cmd.path = mod.path\n         cmd.name = mod.name\n         cmd.dpi = mod.dpi\n         cmd.width = mod.width\n         cmd.height = mod.height\n         mods.output(mod,'toolpath',cmd)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // info\n   //\n   var text = document.createTextNode('name: ')\n      div.appendChild(text)\n      mod.nametext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(mm)')\n      div.appendChild(text)\n      mod.mmtext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(in)')\n      div.appendChild(text)\n      mod.intext = text\n   //\n   // view\n   //   \n   div.appendChild(document.createElement('br'))   \n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n         var text = document.createTextNode('view')\n            span.appendChild(text)\n         btn.appendChild(span)\n      btn.addEventListener('click',function(){\n         open_view_window()\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// show_path_info\n//\nfunction show_path_info() {\n   mod.nametext.nodeValue = 'name: '+mod.name\n   var width = (25.4*mod.width/mod.dpi).toFixed(3)\n   var height = (25.4*mod.height/mod.dpi).toFixed(3)\n   var depth = (25.4*mod.depth/mod.dpi).toFixed(3)\n   if (mod.depth == undefined)\n      mod.mmtext.nodeValue = width+' x '+height+' (mm)'\n   else\n      mod.mmtext.nodeValue = width+' x '+height+' x '+depth+' (mm)'\n   var width = (mod.width/mod.dpi).toFixed(3)\n   var height = (mod.height/mod.dpi).toFixed(3)\n   var depth = (mod.depth/mod.dpi).toFixed(3)\n   if (mod.depth == undefined)\n      mod.intext.nodeValue = width+' x '+height+' (in)'\n   else\n      mod.intext.nodeValue = width+' x '+height+' x '+depth+' (in)'\n   mods.fit(mod.div)\n   }\n//\n// show_path\n//\nfunction show_path() {\n   var scene = mod.scene\n   var camera = mod.camera\n   var renderer = mod.renderer\n   //\n   // check if view window open\n   //\n   if (mod.win == undefined) {\n      open_view_window()\n      return\n      }\n   //\n   // check for path\n   //\n   if (mod.path == undefined)\n      return\n   //\n   // clear scene, leave camera\n   //\n   var length = scene.children.length\n   for (var c = (length-1); c > 1; --c) {\n      scene.remove(scene.children[c])\n      }\n   //\n   // fit camera\n   //\n   mod.thetaxy = 0\n   mod.thetaz = 0\n   mod.r = mod.height/2\n   mod.x0 = mod.width/2\n   mod.y0 = mod.height/2\n   camera.position.set(mod.x0,mod.y0,mod.r)\n   camera.up = new THREE.Vector3(0,1,0)\n   camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n   camera.updateProjectionMatrix()\n   //\n   // draw segments\n   //\n   var arrow_size = 1+mod.width/200\n   var path = mod.path\n   for (var segment = 0; segment < path.length; ++segment) {\n      if (segment > 0)\n         add_arrow(path[segment-1][path[segment-1].length-1],path[segment][0],0xff0000,arrow_size)         \n      for (var point = 1; point < path[segment].length; ++point) {\n         add_arrow(path[segment][point-1],path[segment][point],0x0000ff,arrow_size)\n         }\n      }\n   //\n   // add axes\n   //\n   var length = mod.height/10\n   add_arrow([0,0,0],[length,0,0],0xff0000,arrow_size)\n   add_arrow([0,0,0],[0,length,0],0x00ff00,arrow_size)\n   add_arrow([0,0,0],[0,0,length],0x0000ff,arrow_size)\n   //\n   // render\n   //\n   update()\n   //\n   // add_arrow\n   //\n   function add_arrow(start,stop,color,size) {\n      var origin = new THREE.Vector3().fromArray(start)\n      if (mod.depth == undefined)\n         origin.z = 0\n      var end  = new THREE.Vector3().fromArray(stop)\n      if (mod.depth == undefined)\n         end.z = 0\n      var length = new THREE.Vector3().subVectors(end,origin).length()\n      if (length <= size) {\n         add_line(origin,end,color)\n         //length = 1.1*size\n         return\n         }\n      var direction = new THREE.Vector3().subVectors(end,origin).normalize()\n      var arrow = new THREE.ArrowHelper(direction,origin,length,color,size,size)\n      scene.add(arrow)\n      }\n   //\n   // add_line\n   //\n   function add_line(start,stop,colorhex) {\n      var geometry = new THREE.Geometry()\n      geometry.vertices.push(start,stop)\n      var material = new THREE.LineBasicMaterial({color:colorhex})\n      var line = new THREE.Line(geometry,material)\n      scene.add(line)\n      }\n   //\n   // update\n   //\n   function update() {\n\t   renderer.render(scene,camera)\n      }\n   }\n//\n// open_view_window\n//\nfunction open_view_window() {\n   //\n   // globals\n   //\n   var container,scene,camera,renderer,win,controls\n   //\n   // open the window\n   //\n   open_window()\n   //\n   // open_window\n   //\n   function open_window() {\n      //\n      // open window\n      //\n      win = window.open('')\n      mod.win = win\n      //\n      // load three.js\n      //\n      var script = document.createElement('script')\n      script.type = 'text/javascript'\n      script.onload = init_window\n      script.src = 'js/three.js/three.min.js'\n      mod.div.appendChild(script)\n      }\n   //\n   // init_window\n   //\n   function init_window() {\n      //\n      // close button\n      //\n      var btn = document.createElement('button')\n         btn.appendChild(document.createTextNode('close'))\n         btn.style.padding = mods.ui.padding\n         btn.style.margin = 1\n         btn.addEventListener('click',function(){\n            win.close()\n            mod.win = undefined\n            })\n         win.document.body.appendChild(btn)\n      //\n      // label text\n      //\n      var text = win.document.createTextNode(' left: pan, right: rotate, scroll: zoom')\n         win.document.body.appendChild(text)\n      //\n      // GL container\n      //\n      win.document.body.appendChild(document.createElement('br'))   \n      container = win.document.createElement('div')\n      container.style.overflow = 'hidden'\n      win.document.body.appendChild(container)\n      //\n      // event handlers\n      //\n      container.addEventListener('contextmenu',context_menu)\n      container.addEventListener('mousedown',mouse_down)\n      container.addEventListener('mouseup',mouse_up)\n      container.addEventListener('mousemove',mouse_move)\n      container.addEventListener('wheel',mouse_wheel)\n      //\n      // add scene\n      //\n\t   scene = new THREE.Scene()\n\t   mod.scene = scene\n\t   var width = win.innerWidth\n\t   var height = win.innerHeight\n\t   var aspect = width/height\n\t   var near = 0.1\n\t   var far = 1000000\n\t   camera = new THREE.PerspectiveCamera(90,aspect,near,far)\n\t   mod.camera = camera\n\t   scene.add(camera)\n\t   //\n\t   // add renderer\n\t   //\n      renderer = new THREE.WebGLRenderer({antialias:true})\n      mod.renderer = renderer\n      renderer.setClearColor(0xffffff)\n\t   renderer.setSize(width,height)\n\t   container.appendChild(renderer.domElement)\n      //\n      // show the path if available\n      //\n      show_path()\n      }\n   //\n   // context_menu\n   //\n   function context_menu(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      return (false)\n      }\n   //\n   // mouse_down\n   //\n   function mouse_down(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      mod.button = evt.button\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      }\n   //\n   // mouse_up\n   //\n   function mouse_up(evt) {\n      mod.button = undefined\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      }\n   //\n   // mouse_move\n   //\n   function mouse_move(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      var dx = evt.clientX-mod.x\n      var dy = evt.clientY-mod.y\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      if (mod.button == 0) {\n         mod.x0 += \n            Math.sin(mod.thetaz)*mod.height*dy/win.innerHeight\n            -Math.cos(mod.thetaz)*mod.width*dx/win.innerWidth\n         mod.y0 += \n            Math.cos(mod.thetaz)*mod.height*dy/win.innerHeight\n            +Math.sin(mod.thetaz)*mod.width*dx/win.innerWidth\n         camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t      camera.up = new THREE.Vector3(Math.sin(mod.thetaz),Math.cos(mod.thetaz),0)\n\t      camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n         camera.updateProjectionMatrix()\n\t      renderer.render(scene,camera)\n\t      }\n      else if (mod.button == 2) {\n         mod.thetaxy += dy/win.innerHeight\n         mod.thetaz += dx/win.innerWidth\n         camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t      camera.up = new THREE.Vector3(Math.sin(mod.thetaz),Math.cos(mod.thetaz),0)\n\t      camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n         camera.updateProjectionMatrix()\n\t      renderer.render(scene,camera)\n\t      }\n      }\n   //\n   // mouse_wheel\n   //\n   function mouse_wheel(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      var dy = evt.deltaY/win.innerHeight\n      mod.r += mod.height*dy\n      camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n      camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n      camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t   camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n      camera.updateProjectionMatrix()\n\t   renderer.render(scene,camera)\n      }\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1294.583507269623","left":"2494.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.9557599338778935":{"definition":"//\n// mill raster 2D\n//\n// Neil Gershenfeld\n// (c) Massachusetts Institute of Technology 2016\n//\n// This work may be reproduced, modified, distributed, performed, and\n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is\n// provided as is; no warranty is provided, and users accept all\n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'mill raster 2D'\n//\n// initialization\n//\nvar init = function() {\n   mod.dia_in.value = 0.0156\n   mod.dia_mm.value = 25.4*parseFloat(mod.dia_in.value)\n   mod.cut_in.value = 0.004\n   mod.cut_mm.value = 25.4*parseFloat(mod.cut_in.value)\n   mod.max_in.value = 0.004\n   mod.max_mm.value = 25.4*parseFloat(mod.max_in.value)\n   mod.number.value = 4\n   mod.stepover.value = 0.5\n   mod.merge.value = 1\n   mod.sort.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   imageInfo:{type:'object',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.width\n         ctx.canvas.height = mod.height\n         }},\n   path:{type:'array',\n      event:function(evt){\n         if (mod.label.nodeValue == 'calculating') {\n            draw_path(evt.detail)\n            accumulate_path(evt.detail)\n            mod.offsetCount += 1\n            if ((mod.offsetCount != parseInt(mod.number.value)) && (evt.detail.length > 0)) {\n               mod.offset += parseFloat(mod.stepover.value)\n               outputs.offset.event()\n               }\n            else {\n               mod.label.nodeValue = 'calculate'\n               mod.labelspan.style.fontWeight = 'normal'\n               merge_path()\n               clear_path()\n               draw_path(mod.path)\n               draw_connections()\n               add_depth()\n               outputs.toolpath.event()\n               }\n            }\n         }\n      },\n   settings:{type:'object',\n      event:function(evt){\n         set_values(evt.detail)\n         }\n      }\n   }\n//\n// outputs\n//\nvar outputs = {\n   diameter:{type:'number',\n      event:function(){\n         mods.output(mod,'diameter',Math.ceil(mod.dpi*mod.dia_in.value))\n         }\n      },\n   offset:{type:'number',\n      event:function(){\n         var pixels = mod.offset*parseFloat(mod.dia_in.value)*mod.dpi\n         mods.output(mod,'offset',pixels)\n         }\n      },\n   toolpath:{type:'object',\n      event:function(){\n         cmd = {}\n         cmd.path = mod.path\n         cmd.name = mod.name\n         cmd.dpi = mod.dpi\n         cmd.width = mod.width\n         cmd.height = mod.height\n         cmd.depth = mod.depth\n         mods.output(mod,'toolpath',cmd)\n         }\n      }\n   }\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // tool diameter\n   //\n   div.appendChild(document.createTextNode('tool diameter'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.dia_in.value = parseFloat(mod.dia_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.dia_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.dia_mm.value = parseFloat(mod.dia_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.dia_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // cut depth\n   //\n   div.appendChild(document.createTextNode('cut depth'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.cut_in.value = parseFloat(mod.cut_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.cut_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.cut_mm.value = parseFloat(mod.cut_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.cut_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // max depth\n   //\n   div.appendChild(document.createTextNode('max depth'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.max_in.value = parseFloat(mod.max_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.max_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.max_mm.value = parseFloat(mod.max_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.max_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // offset number\n   //\n   div.appendChild(document.createTextNode('offset number: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.number = input\n   div.appendChild(document.createTextNode(' (0 = fill)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // offset stepover\n   //\n   div.appendChild(document.createTextNode('offset stepover: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.stepover = input\n   div.appendChild(document.createTextNode(' (1 = diameter)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // direction\n   //\n   div.appendChild(document.createTextNode('direction: '))\n   div.appendChild(document.createTextNode('climb'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'direction'\n      input.id = mod.div.id+'climb'\n      input.checked = true\n      div.appendChild(input)\n      mod.climb = input\n   div.appendChild(document.createTextNode(' conventional'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'direction'\n      input.id = mod.div.id+'conventional'\n      div.appendChild(input)\n      mod.conventional = input\n   div.appendChild(document.createElement('br'))\n   //\n   // path merge\n   //\n   div.appendChild(document.createTextNode('path merge: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.merge = input\n   div.appendChild(document.createTextNode(' (1 = diameter)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // path order\n   //\n   div.appendChild(document.createTextNode('path order: '))\n   div.appendChild(document.createTextNode('forward'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'order'\n      input.id = mod.div.id+'forward'\n      input.checked = true\n      div.appendChild(input)\n      mod.forward = input\n   div.appendChild(document.createTextNode(' reverse'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'order'\n      input.id = mod.div.id+'reverse'\n      div.appendChild(input)\n      mod.reverse = input\n   div.appendChild(document.createElement('br'))\n   //\n   // sort distance\n   //\n   div.appendChild(document.createTextNode('sort distance: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.id = mod.div.id+'sort'\n      div.appendChild(input)\n      mod.sort = input\n   div.appendChild(document.createElement('br'))\n   //\n   // calculate\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n         var text = document.createTextNode('calculate')\n            mod.label = text\n            span.appendChild(text)\n         mod.labelspan = span\n         btn.appendChild(span)\n      btn.addEventListener('click',function(){\n         mod.label.nodeValue = 'calculating'\n         mod.labelspan.style.fontWeight = 'bold'\n         mod.offset = 0.5\n         mod.offsetCount = 0\n         mod.path = []\n         clear_path()\n         outputs.diameter.event()\n         outputs.offset.event()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createTextNode(' '))\n   //\n   // view\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var svg = document.getElementById(mod.div.id+'svg')\n         var clone = svg.cloneNode(true)\n         clone.setAttribute('width',mod.img.width)\n         clone.setAttribute('height',mod.img.height)\n         win.document.body.appendChild(clone)\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // on-screen SVG\n   //\n   var svgNS = \"http://www.w3.org/2000/svg\"\n   var svg = document.createElementNS(svgNS,\"svg\")\n   svg.setAttribute('id',mod.div.id+'svg')\n   svg.setAttributeNS(\"http://www.w3.org/2000/xmlns/\",\n      \"xmlns:xlink\",\"http://www.w3.org/1999/xlink\")\n   svg.setAttribute('width',mods.ui.canvas)\n   svg.setAttribute('height',mods.ui.canvas)\n   svg.style.backgroundColor = 'rgb(255,255,255)'\n   var g = document.createElementNS(svgNS,'g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   div.appendChild(svg)\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   }\n//\n// local functions\n//\n// set_values\n//\nfunction set_values(settings) {\n   for (var s in settings) {\n      switch(s) {\n         case 'tool diameter (in)':\n            mod.dia_in.value = settings[s]\n            mod.dia_mm.value = parseFloat(mod.dia_in.value)*25.4\n            break\n         case 'cut depth (in)':\n            mod.cut_in.value = settings[s]\n            mod.cut_mm.value = parseFloat(mod.cut_in.value)*25.4\n            break\n         case 'max depth (in)':\n            mod.max_in.value = settings[s]\n            mod.max_mm.value = parseFloat(mod.max_in.value)*25.4\n            break\n         case 'offset number':\n            mod.number.value = settings[s]\n            break\n         }\n      }\n   }\n//\n// clear_path\n//\nfunction clear_path() {\n   var svg = document.getElementById(mod.div.id+'svg')\n   svg.setAttribute('viewBox',\"0 0 \"+(mod.img.width-1)+\" \"+(mod.img.height-1))\n   var g = document.getElementById(mod.div.id+'g')\n   svg.removeChild(g)\n   var g = document.createElementNS('http://www.w3.org/2000/svg','g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   }\n//\n// accumulate_path\n//    todo: replace inefficient insertion sort\n//    todo: move sort out of main thread\n//\nfunction accumulate_path(path) {\n   var forward = mod.forward.checked\n   var conventional = mod.conventional.checked\n   var sort = mod.sort.checked\n   for (var segnew = 0; segnew < path.length; ++segnew) {\n      if (conventional)\n         path[segnew].reverse()\n      if (mod.path.length == 0)\n         mod.path.splice(0,0,path[segnew])\n      else if (sort) {\n         var xnew = path[segnew][0][0]\n         var ynew = path[segnew][0][1]\n         var dmin = Number.MAX_VALUE\n         var segmin = -1\n         for (var segold = 0; segold < mod.path.length; ++segold) {\n            var xold = mod.path[segold][0][0]\n            var yold = mod.path[segold][0][1]\n            var dx = xnew-xold\n            var dy = ynew-yold\n            var d = Math.sqrt(dx*dx+dy*dy)\n            if (d < dmin) {\n               dmin = d\n               segmin = segold\n               }\n            }\n         if (forward)\n            mod.path.splice(segmin+1,0,path[segnew])\n         else\n            mod.path.splice(segmin,0,path[segnew])\n         }\n      else {\n         if (forward)\n            mod.path.splice(mod.path.length,0,path[segnew])\n         else\n            mod.path.splice(0,0,path[segnew])\n         }\n      }\n   }\n//\n// merge_path\n//\nfunction merge_path() {\n   var dmerge = mod.dpi*parseFloat(mod.merge.value)*parseFloat(mod.dia_in.value)\n   var seg = 0\n   while (seg < (mod.path.length-1)) {\n      var xold = mod.path[seg][mod.path[seg].length-1][0]\n      var yold = mod.path[seg][mod.path[seg].length-1][1]\n      var xnew = mod.path[seg+1][0][0]\n      var ynew = mod.path[seg+1][0][1]\n      var dx = xnew-xold\n      var dy = ynew-yold\n      var d = Math.sqrt(dx*dx+dy*dy)\n      if (d < dmerge)\n         mod.path.splice(seg,2,mod.path[seg].concat(mod.path[seg+1]))\n      else\n         seg += 1\n      }\n   }\n//\n// add_depth\n//\nfunction add_depth() {\n   var cut = parseFloat(mod.cut_in.value)\n   var max = parseFloat(mod.max_in.value)\n   var newpath = []\n   for (var seg = 0; seg < mod.path.length; ++seg) {\n      var depth = cut\n      if ((mod.path[seg][0][0] == mod.path[seg][mod.path[seg].length-1][0])\n         && (mod.path[seg][0][0] == mod.path[seg][mod.path[seg].length-1][0])) {\n         var newseg = []\n         while (depth <= max) {\n            var idepth = -Math.round(mod.dpi*depth)\n            for (var pt = 0; pt < mod.path[seg].length; ++pt) {\n               var point = mod.path[seg][pt].concat(idepth)\n               newseg.splice(newseg.length,0,point)\n               }\n            if (depth == max)\n               break\n            depth += cut\n            if (depth > max)\n               depth = max\n            }\n         newpath.splice(newpath.length,0,newseg)\n         }\n      else {\n         var newseg = []\n         while (depth <= max) {\n            var idepth = -Math.round(mod.dpi*depth)\n            for (var pt = 0; pt < mod.path[seg].length; ++pt) {\n               var point = mod.path[seg][pt].concat(idepth)\n               newseg.splice(newseg.length,0,point)\n               }\n            newpath.splice(newpath.length,0,newseg)\n            newseg = []\n            if (depth == max)\n               break\n            depth += cut\n            if (depth > max)\n               depth = max\n            }\n         }\n      }\n   mod.path = newpath\n   mod.depth = Math.round(parseFloat(mod.max_in.value)*mod.dpi)\n   }\n//\n// draw_path\n//\nfunction draw_path(path) {\n   var g = document.getElementById(mod.div.id+'g')\n   var h = mod.img.height\n   var w = mod.img.width\n   var xend = null\n   var yend = null\n   //\n   // loop over segments\n   //\n   for (var segment = 0; segment < path.length; ++segment) {\n      if (path[segment].length > 1) {\n         //\n         // loop over points\n         //\n         for (var point = 1; point < path[segment].length; ++point) {\n            var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n            line.setAttribute('stroke','black')\n            line.setAttribute('stroke-width',1)\n            line.setAttribute('stroke-linecap','round')\n            var x1 = path[segment][point-1][0]\n            var y1 = h-path[segment][point-1][1]-1\n            var x2 = path[segment][point][0]\n            var y2 = h-path[segment][point][1]-1\n            xend = x2\n            yend = y2\n            line.setAttribute('x1',x1)\n            line.setAttribute('y1',y1)\n            line.setAttribute('x2',x2)\n            line.setAttribute('y2',y2)\n            var dx = x2-x1\n            var dy = y2-y1\n            var d = Math.sqrt(dx*dx+dy*dy)\n            if (d > 0) {\n               nx = 6*dx/d\n               ny = 6*dy/d\n               var tx = 3*dy/d\n               var ty = -3*dx/d\n               g.appendChild(line)\n               triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n               triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                  +' '+(x2-nx-tx)+','+(y2-ny-ty))\n               triangle.setAttribute('fill','black')\n               g.appendChild(triangle)\n               }\n            }\n         }\n      }\n   }\n//\n// draw_connections\n//\nfunction draw_connections() {\n   var g = document.getElementById(mod.div.id+'g')\n   var h = mod.img.height\n   var w = mod.img.width\n   //\n   // loop over segments\n   //\n   for (var segment = 1; segment < mod.path.length; ++segment) {\n      //\n      // draw connection from previous segment\n      //\n      var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n      line.setAttribute('stroke','red')\n      line.setAttribute('stroke-width',1)\n      line.setAttribute('stroke-linecap','round')\n      var x1 = mod.path[segment-1][mod.path[segment-1].length-1][0]\n      var y1 = h-mod.path[segment-1][mod.path[segment-1].length-1][1]-1\n      var x2 = mod.path[segment][0][0]\n      var y2 = h-mod.path[segment][0][1]-1\n      line.setAttribute('x1',x1)\n      line.setAttribute('y1',y1)\n      line.setAttribute('x2',x2)\n      line.setAttribute('y2',y2)\n      var dx = x2-x1\n      var dy = y2-y1\n      var d = Math.sqrt(dx*dx+dy*dy)\n      if (d > 0) {\n         nx = 6*dx/d\n         ny = 6*dy/d\n         var tx = 3*dy/d\n         var ty = -3*dx/d\n         g.appendChild(line)\n         triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n         triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n            +' '+(x2-nx-tx)+','+(y2-ny-ty))\n         triangle.setAttribute('fill','red')\n         g.appendChild(triangle)\n         }\n      }\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n\n","top":"515.583507269623","left":"2517.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.10309904694903338":{"definition":"//\n// vectorize\n//    input is red 128:north,64:south, green 128:east,64:west, blue 128:start,64:stop\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'vectorize'\n//\n// initialization\n//\nvar init = function() {\n   mod.error.value = 1\n   mod.sort.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         vectorize()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   path:{type:'array',\n      event:function(){\n         mods.output(mod,'path',mod.path)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen SVG\n   //\n   var svgNS = \"http://www.w3.org/2000/svg\"\n   var svg = document.createElementNS(svgNS,\"svg\")\n   svg.setAttribute('id',mod.div.id+'svg')\n   svg.setAttributeNS(\"http://www.w3.org/2000/xmlns/\",\n      \"xmlns:xlink\",\"http://www.w3.org/1999/xlink\")\n   svg.setAttribute('width',mods.ui.canvas)\n   svg.setAttribute('height',mods.ui.canvas)\n   svg.style.backgroundColor = 'rgb(255,255,255)'\n   var g = document.createElementNS(svgNS,'g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   div.appendChild(svg)\n   div.appendChild(document.createElement('br'))   \n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // error value\n   //\n   div.appendChild(document.createTextNode('vector fit (pixels): '))\n   //div.appendChild(document.createElement('br'))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         vectorize()\n         })\n      div.appendChild(input)\n      mod.error = input\n   div.appendChild(document.createElement('br'))\n   //\n   // sort\n   //\n   div.appendChild(document.createTextNode('sort distance: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.id = mod.div.id+'sort'\n      div.appendChild(input)\n      mod.sort = input\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var svg = document.getElementById(mod.div.id+'svg')\n         var clone = svg.cloneNode(true)\n         clone.setAttribute('width',mod.img.width)\n         clone.setAttribute('height',mod.img.height)\n         win.document.body.appendChild(clone)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// vectorize\n//\nfunction vectorize() {\n   //\n   // draw path\n   //\n   function draw_path(path) {\n      window.URL.revokeObjectURL(url)\n      var svg = document.getElementById(mod.div.id+'svg')\n      svg.setAttribute('viewBox',\"0 0 \"+(mod.img.width-1)+\" \"+(mod.img.height-1))\n      var g = document.getElementById(mod.div.id+'g')\n      svg.removeChild(g)\n      var g = document.createElementNS('http://www.w3.org/2000/svg','g')\n      g.setAttribute('id',mod.div.id+'g')\n      var h = mod.img.height\n      var w = mod.img.width\n      var xend = null\n      var yend = null\n      //\n      // loop over segments\n      //\n      for (var segment in path) {\n         if (path[segment].length > 1) {\n            if (xend != null) {\n               //\n               // draw connection from previous segment\n               //\n               var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n               line.setAttribute('stroke','red')\n               line.setAttribute('stroke-width',1)\n               line.setAttribute('stroke-linecap','round')\n               var x1 = xend\n               var y1 = yend\n               var x2 = path[segment][0][0]\n               var y2 = h-path[segment][0][1]-1\n               line.setAttribute('x1',x1)\n               line.setAttribute('y1',y1)\n               line.setAttribute('x2',x2)\n               line.setAttribute('y2',y2)\n               var dx = x2-x1\n               var dy = y2-y1\n               var d = Math.sqrt(dx*dx+dy*dy)\n               if (d > 0) {\n                  nx = 6*dx/d\n                  ny = 6*dy/d\n                  var tx = 3*dy/d\n                  var ty = -3*dx/d\n                  g.appendChild(line)\n                  triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n                  triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                     +' '+(x2-nx-tx)+','+(y2-ny-ty))\n                  triangle.setAttribute('fill','red')\n                  g.appendChild(triangle)\n                  }\n               }\n            //\n            // loop over points\n            //\n            for (var point = 1; point < path[segment].length; ++point) {\n               var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n               line.setAttribute('stroke','black')\n               line.setAttribute('stroke-width',1)\n               line.setAttribute('stroke-linecap','round')\n               var x1 = path[segment][point-1][0]\n               var y1 = h-path[segment][point-1][1]-1\n               var x2 = path[segment][point][0]\n               var y2 = h-path[segment][point][1]-1\n               xend = x2\n               yend = y2\n               line.setAttribute('x1',x1)\n               line.setAttribute('y1',y1)\n               line.setAttribute('x2',x2)\n               line.setAttribute('y2',y2)\n               var dx = x2-x1\n               var dy = y2-y1\n               var d = Math.sqrt(dx*dx+dy*dy)\n               if (d > 0) {\n                  nx = 6*dx/d\n                  ny = 6*dy/d\n                  var tx = 3*dy/d\n                  var ty = -3*dx/d\n                  g.appendChild(line)\n                  triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n                  triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                     +' '+(x2-nx-tx)+','+(y2-ny-ty))\n                  triangle.setAttribute('fill','black')\n                  g.appendChild(triangle)\n                  }\n               }\n            }\n         }\n      svg.appendChild(g)\n      }\n   //\n   // set up worker\n   //\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      webworker.terminate()\n      mod.path = evt.data.path\n      draw_path(mod.path)\n      outputs.path.event()\n      })\n   //\n   // call worker\n   //\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,sort:mod.sort.checked,\n      error:parseFloat(mod.error.value),\n      buffer:mod.input.data.buffer})\n   }\n//\n// vectorize worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var sort = evt.data.sort\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var northsouth = 0\n      var north = 128\n      var south = 64\n      var eastwest = 1\n      var east = 128\n      var west = 64\n      var startstop = 2\n      var start = 128\n      var stop = 64\n      var path = []\n      //\n      // edge follower\n      //\n      function follow_edges(row,col) {\n         if ((input[(h-1-row)*w*4+col*4+northsouth] != 0)\n            || (input[(h-1-row)*w*4+col*4+eastwest] != 0)) {\n            path[path.length] = [[col,row]]\n            while (1) {\n               if (input[(h-1-row)*w*4+col*4+northsouth] & north) {\n                  input[(h-1-row)*w*4+col*4+northsouth] =\n                     input[(h-1-row)*w*4+col*4+northsouth] & ~north\n                  row += 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+northsouth] & south) {\n                  input[(h-1-row)*w*4+col*4+northsouth] =\n                     input[(h-1-row)*w*4+col*4+northsouth] & ~south\n                  row -= 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+eastwest] & east) {\n                  input[(h-1-row)*w*4+col*4+eastwest] =\n                     input[(h-1-row)*w*4+col*4+eastwest] & ~east\n                  col += 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+eastwest] & west) {\n                  input[(h-1-row)*w*4+col*4+eastwest] =\n                     input[(h-1-row)*w*4+col*4+eastwest] & ~west\n                  col -= 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else\n                  break\n               }\n            }\n         }\n      //\n      // follow boundary starts\n      //\n      for (var row = 1; row < (h-1); ++row) {\n         col = 0\n         follow_edges(row,col)\n         col = w-1\n         follow_edges(row,col)\n         }\n      for (var col = 1; col < (w-1); ++col) {\n         row = 0\n         follow_edges(row,col)\n         row = h-1      \n         follow_edges(row,col)\n         }\n      //\n      // follow interior paths\n      //\n      for (var row = 1; row < (h-1); ++row) {\n         for (var col = 1; col < (w-1); ++col) {\n            follow_edges(row,col)\n            }\n         }\n      //\n      // vectorize path\n      //\n      var error = evt.data.error\n      var vecpath = []\n      for (var seg = 0; seg < path.length; ++seg) {\n         var x0 = path[seg][0][0]\n         var y0 = path[seg][0][1]\n         vecpath[vecpath.length] = [[x0,y0]]\n         var xsum = x0\n         var ysum = y0\n         var sum = 1\n         for (var pt = 1; pt < path[seg].length; ++pt) {\n            var xold = x\n            var yold = y\n            var x = path[seg][pt][0]\n            var y = path[seg][pt][1]\n            if (sum == 1) {\n               xsum += x\n               ysum += y\n               sum += 1\n               }\n            else {\n               var xmean = xsum/sum\n               var ymean = ysum/sum\n               var dx = xmean-x0\n               var dy = ymean-y0\n               var d = Math.sqrt(dx*dx+dy*dy)\n               var nx = dy/d\n               var ny = -dx/d\n               var l = Math.abs(nx*(x-x0)+ny*(y-y0))\n               if (l < error) {\n                  xsum += x\n                  ysum += y\n                  sum += 1\n                  }\n               else {\n                  vecpath[vecpath.length-1][vecpath[vecpath.length-1].length] = [xold,yold]\n                  x0 = xold\n                  y0 = yold\n                  xsum = xold\n                  ysum = yold\n                  sum = 1\n                  }\n               }\n            if (pt == (path[seg].length-1)) {\n               vecpath[vecpath.length-1][vecpath[vecpath.length-1].length] = [x,y]\n               }\n            }\n         }\n      //\n      // sort path\n      //\n      if ((vecpath.length > 1) && (sort == true)) {\n         var dmin = w*w+h*h\n         segmin = null\n         for (var seg = 0; seg < vecpath.length; ++seg) {\n            var x = vecpath[seg][0][0]\n            var y = vecpath[seg][0][0]\n            var d = x*x+y*y\n            if (d < dmin) {\n               dmin = d\n               segmin = seg\n               }\n            }\n         if (segmin != null) {\n            var sortpath = [vecpath[segmin]]\n            vecpath.splice(segmin,1)\n            }\n         while (vecpath.length > 0) {\n            var dmin = w*w+h*h\n            var x0 = sortpath[sortpath.length-1][sortpath[sortpath.length-1].length-1][0]\n            var y0 = sortpath[sortpath.length-1][sortpath[sortpath.length-1].length-1][1]\n            segmin = null\n            for (var seg = 0; seg < vecpath.length; ++seg) {\n               var x = vecpath[seg][0][0]\n               var y = vecpath[seg][0][1]\n               var d = (x-x0)*(x-x0)+(y-y0)*(y-y0)\n               if (d < dmin) {\n                  dmin = d\n                  segmin = seg\n                  }\n               }\n            if (segmin != null) {\n               sortpath[sortpath.length] = vecpath[segmin]\n               vecpath.splice(segmin,1)\n               }\n            }\n         }\n      else if (((vecpath.length > 1) && (sort == false)) || (vecpath.length == 1))\n         sortpath = vecpath\n      else\n         sortpath = []\n      //\n      // return path\n      //\n      self.postMessage({path:sortpath})\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1060.583507269623","left":"3208.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.992472539363189":{"definition":"//\n// set object\n//\n// Neil Gershenfeld\n// (c) Massachusetts Institute of Technology 2018\n//\n// This work may be reproduced, modified, distributed, performed, and\n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is\n// provided as is; no warranty is provided, and users accept all\n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'set PCB defaults'\n//\n// initialization\n//\nvar init = function() {\n   //\n   add_output('mill traces (1/64)')\n   add_variable('tool diameter (in)','var00')\n   mod.var00.value = '0.0156'\n   add_variable('cut depth (in)','var01')\n   mod.var01.value = '0.004'\n   add_variable('max depth (in)','var02')\n   mod.var02.value = '0.004'\n   add_variable('offset number','var03')\n   mod.var03.value = '4'\n   //\n   add_output('mill outline (1/32)')\n   add_variable('tool diameter (in)','var10')\n   mod.var10.value = '0.0312'\n   add_variable('cut depth (in)','var11')\n   mod.var11.value = '0.010'\n   add_variable('max depth (in)','var12')\n   mod.var12.value = '0.072'\n   add_variable('offset number','var13')\n   mod.var13.value = '1'\n   //\n   }\n//\n// inputs\n//\nvar inputs = {}\n//\n// outputs\n//\nvar outputs = {\n   settings:{type:'',\n      event:function(vars){\n         mods.output(mod,'settings',vars)\n         }\n      }\n   }\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   }\n//\n// local functions\n//\nfunction add_output(label) {\n   if (mod.settings == undefined) {\n      mod.settings = {}\n      }\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n      var text = document.createTextNode(label)\n         span.appendChild(text)\n      btn.appendChild(span)\n      var f = function(label) {\n         btn.addEventListener('click',function() {\n            for (var s in mod.settings)\n               mod.settings[s].span.style.fontWeight = 'normal'\n            mod.settings[label].span.style.fontWeight = 'bold'\n            var vars = {}\n            for (var v in mod.settings[label].variables)\n               vars[v] = mod.settings[label].variables[v].value\n            outputs.settings.event(vars)\n            })\n         }(label)\n      mod.settings[label] = {span:span,variables:{}}\n      mod.div.appendChild(btn)\n      mod.setting = label\n   mod.div.appendChild(document.createElement('br'))\n   }\nfunction add_variable(label,variable) {\n   var text = document.createTextNode(label)\n      mod.div.appendChild(text)\n   mod.div.appendChild(document.createTextNode(': '))\n   input = document.createElement('input')\n      input.type = 'text'\n      input.size = 10\n      mod[variable] = input\n      mod.div.appendChild(input)\n   mod.settings[mod.setting].variables[label] = input \n   mod.div.appendChild(document.createElement('br'))\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"435.58350726962306","left":"1973.9944082591242","filename":"undefined","inputs":{},"outputs":{}},"0.8622681794886853":{"definition":"//\n// save file\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'save file'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   file:{type:'object',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.contents = evt.detail.contents\n         save_file()\n         }}}\n//\n// outputs\n//\nvar outputs = {}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // info\n   //\n   var text = document.createTextNode('name:')\n      div.appendChild(text)\n      mod.nametext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('size:')\n      div.appendChild(text)\n      mod.sizetext = text\n   div.appendChild(document.createElement('br'))\n   }\n//\n// local functions\n//\nfunction save_file() {\n   var a = document.createElement('a')\n   a.setAttribute('href','data:text/plain;charset=utf-8,'+ \n      encodeURIComponent(mod.contents))\n   a.setAttribute('download',mod.name)\n   a.style.display = 'none'\n   document.body.appendChild(a)\n   a.click()\n   document.body.removeChild(a)\n   mod.nametext.nodeValue = 'name: '+mod.name\n   mods.fit(mod.div)\n   mod.sizetext.nodeValue = 'size: '+mod.contents.length\n   mods.fit(mod.div)\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1282.9473065265367","left":"2013.9337776993061","filename":"modules/file/save","inputs":{},"outputs":{}},"0.057765477464730264":{"definition":"//\n// read SVG\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'read SVG'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   SVG:{type:'string',\n      event:function(evt) {\n         svg_load_handler({target:{result:evt.detail}})\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   SVG:{type:'string',\n      event:function(){\n         mods.output(mod,'SVG',mod.str)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // file input control\n   //\n   var file = document.createElement('input')\n      file.setAttribute('type','file')\n      file.setAttribute('id',div.id+'file_input')\n      file.style.position = 'absolute'\n      file.style.left = 0\n      file.style.top = 0\n      file.style.width = 0\n      file.style.height = 0\n      file.style.opacity = 0\n      file.addEventListener('change',function() {\n         svg_read_handler()\n         })\n      div.appendChild(file)\n      mod.file = file\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // file select button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('select SVG file'))\n      btn.addEventListener('click',function(){\n         var file = document.getElementById(div.id+'file_input')\n         file.value = null\n         file.click()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // info div\n   //\n   var info = document.createElement('div')\n      info.setAttribute('id',div.id+'info')\n      var text = document.createTextNode('file:')\n         info.appendChild(text)\n         mod.name = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('width:')\n         info.appendChild(text)\n         mod.width = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('height:')\n         info.appendChild(text)\n         mod.height = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('units per inch:')\n         info.appendChild(text)\n         mod.units = text\n      div.appendChild(info)\n   }\n//\n// local functions\n//\n// read handler\n//\nfunction svg_read_handler(event) {\n   //\n   // read as text\n   //\n   var file_reader = new FileReader()\n   file_reader.onload = svg_load_handler\n   var input_file = mod.file.files[0]\n   var file_name = input_file.name\n   mod.name.nodeValue = \"file: \"+file_name\n   file_reader.readAsText(input_file)\n   }\n//\n// load handler\n//\nfunction svg_load_handler(event) {\n   mod.str = event.target.result\n   //\n   // parse size\n   //\n   var i = mod.str.indexOf(\"width\")\n   if (i == -1) {\n      mod.width.nodeValue = \"width: not found\"\n      mod.height.nodeValue = \"height: not found\"\n      }\n   else {\n      var i1 = mod.str.indexOf(\"\\\"\",i+1)\n      var i2 = mod.str.indexOf(\"\\\"\",i1+1)\n      var width = mod.str.substring(i1+1,i2)\n      i = mod.str.indexOf(\"height\")\n      i1 = mod.str.indexOf(\"\\\"\",i+1)\n      i2 = mod.str.indexOf(\"\\\"\",i1+1)\n      var height = mod.str.substring(i1+1,i2)\n      ih = mod.str.indexOf(\"height\")\n      if (width.indexOf(\"px\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 90\n         }\n      else if (width.indexOf(\"mm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 25.4\n         }\n      else if (width.indexOf(\"cm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 2.54\n         }\n      else if (width.indexOf(\"in\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 1\n         }\n      else {\n         var units = 90\n         }\n      mod.width.nodeValue = \"width: \"+width\n      mod.height.nodeValue = \"height: \"+height\n      mod.units.nodeValue = \"units per inch: \"+units\n      }\n   //\n   // display\n   //\n   var img = new Image()\n   var src = \"data:image/svg+xml;base64,\"+window.btoa(mod.str)\n   img.setAttribute(\"src\",src)\n   img.onload = function() {\n      if (img.width > img.height) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-img.height/img.width)\n         var w = mod.canvas.width\n         var h = mod.canvas.width*img.height/img.width\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-img.width/img.height)\n         var y0 = 0\n         var w = mod.canvas.height*img.width/img.height\n         var h = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n         ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n         ctx.drawImage(img,x0,y0,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = img.width\n         ctx.canvas.height = img.height \n         ctx.drawImage(img,0,0)\n      outputs.SVG.event()\n      }\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"399.03488793999406","left":"1166.572396970906","filename":"modules/read/svg","inputs":{},"outputs":{}},"0.5022735462618486":{"definition":"//\n// convert SVG image\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2018\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'convert SVG image'\n//\n// initialization\n//\nvar init = function() {\n   mod.dpi.value = '1000'\n   }\n//\n// inputs\n//\nvar inputs = {\n   SVG:{type:'string',\n      event:function(evt){\n         mod.svg = evt.detail\n         get_size()\n         load_image()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}},\n   imageInfo:{type:'object',\n      event:function(){\n         var obj = {}\n         obj.name = \"SVG image\"\n         obj.dpi = parseFloat(mod.dpi.value)\n         obj.width = mod.img.width\n         obj.height = mod.img.height\n         mods.output(mod,'imageInfo',obj)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   //\n   // invert button\n   //\n   div.appendChild(document.createTextNode(' '))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('invert'))\n      btn.addEventListener('click',function(){\n         invert_image()\n         })\n      div.appendChild(btn)\n   //\n   // dpi\n   //\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('dpi: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         load_image()\n         })\n      div.appendChild(input)\n      mod.dpi = input\n   div.appendChild(document.createTextNode(' (enter)'))\n   //\n   // units\n   //\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('units: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         load_image()\n         })\n      div.appendChild(input)\n      mod.unitstext = input\n   div.appendChild(document.createTextNode(' (enter)'))\n   //\n   // fill\n   //\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('fill background: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.checked = true\n      input.id = mod.div.id+'fill'\n      div.appendChild(input)\n      mod.fill= input\n   //\n   // size\n   //\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('image size:')\n      div.appendChild(text)\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(pixels)')\n      div.appendChild(text)\n      mod.pixels = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(inches)')\n      div.appendChild(text)\n      mod.inches = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(mm)')\n      div.appendChild(text)\n      mod.mm = text\n   }\n//\n// local functions\n//\n// get size\n//\nfunction get_size() {\n   var i = mod.svg.indexOf(\"width\")\n   if (i == -1) {\n      var width = 1\n      var height = 1\n      var units = 90\n      }\n   else {\n      var i1 = mod.svg.indexOf(\"\\\"\",i+1)\n      var i2 = mod.svg.indexOf(\"\\\"\",i1+1)\n      var width = mod.svg.substring(i1+1,i2)\n      i = mod.svg.indexOf(\"height\")\n      i1 = mod.svg.indexOf(\"\\\"\",i+1)\n      i2 = mod.svg.indexOf(\"\\\"\",i1+1)\n      var height = mod.svg.substring(i1+1,i2)\n      ih = mod.svg.indexOf(\"height\")\n      if (width.indexOf(\"px\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 90\n         }\n      else if (width.indexOf(\"mm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 25.4\n         }\n      else if (width.indexOf(\"cm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 2.54\n         }\n      else if (width.indexOf(\"in\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 1\n         }\n      else {\n         var units = 90\n         }\n      }\n   mod.width = parseFloat(width)\n   mod.height = parseFloat(height)\n   mod.units = units\n   mod.unitstext.value = units\n   }\n//\n// load image\n//\nfunction load_image() {\n   var src = \"data:image/svg+xml;base64,\"+window.btoa(mod.svg)\n   var img = new Image()\n   img.setAttribute(\"src\",src)\n   img.onload = function() {\n      var dpi = parseFloat(mod.dpi.value)\n      var units = parseFloat(mod.unitstext.value)\n      var width = parseInt(dpi*mod.width/units)\n      var height = parseInt(dpi*mod.height/units)\n      mod.pixels.nodeValue =\n         width+' x '+height+\" (pixels)\"\n      mod.inches.nodeValue =\n         (width/dpi).toFixed(3)+' x '+(height/dpi).toFixed(3)+\" (inches)\"\n      mod.mm.nodeValue =\n      (25.4*width/dpi).toFixed(3)+' x '+(25.4*height/dpi).toFixed(3)+\" (mm)\"\n      mod.img.width = width\n      mod.img.height = height\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.clearRect(0,0,width,height)\n      ctx.drawImage(img,0,0,width,height)\n      if (mod.fill.checked)\n         fill_image()\n      else\n         output_image()\n      }\n   }\n//\n// output_image\n//\nfunction output_image() {\n   if (mod.img.width > mod.img.height) {\n      var x0 = 0\n      var y0 = mod.canvas.height*.5*(1-mod.img.height/mod.img.width)\n      var w = mod.canvas.width\n      var h = mod.canvas.width*mod.img.height/mod.img.width\n      }\n   else {\n      var x0 = mod.canvas.width*.5*(1-mod.img.width/mod.img.height)\n      var y0 = 0\n      var w = mod.canvas.height*mod.img.width/mod.img.height\n      var h = mod.canvas.height\n      }\n   var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,w,h)\n   outputs.image.event()\n   outputs.imageInfo.event()\n   }\n//\n// fill image\n//\nfunction fill_image() {\n   var blob = new Blob(['('+fill_worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      output_image()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var h = mod.img.height\n   var w = mod.img.width\n   var ctx = mod.img.getContext(\"2d\")\n   var img = ctx.getImageData(0,0,w,h)\n   webworker.postMessage({\n      height:img.height,width:img.width,buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction fill_worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            alpha = buf[(h-1-row)*w*4+col*4+3]/255\n            buf[(h-1-row)*w*4+col*4+0] \n               = (1-alpha)*255+alpha*buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+1] \n               = (1-alpha)*255+alpha*buf[(h-1-row)*w*4+col*4+1] \n            buf[(h-1-row)*w*4+col*4+2] \n               = (1-alpha)*255+alpha*buf[(h-1-row)*w*4+col*4+2] \n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// invert image\n//\nfunction invert_image() {\n   var blob = new Blob(['('+invert_worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var h = mod.img.height\n   var w = mod.img.width\n   var ctx = mod.img.getContext(\"2d\")\n   var img = ctx.getImageData(0,0,w,h)\n   webworker.postMessage({\n      height:img.height,width:img.width,buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction invert_worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+0] \n               = 255-buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+1] \n               = 255-buf[(h-1-row)*w*4+col*4+1] \n            buf[(h-1-row)*w*4+col*4+2] \n               = 255-buf[(h-1-row)*w*4+col*4+2] \n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"505.69493521948414","left":"1540.852199242571","filename":"modules/convert/svg/image","inputs":{},"outputs":{}},"0.9604471250218796":{"definition":"//\n// path to G-code\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2018\n// \n// Updated: Steven Chew\n// Date:    Feb 20 2019\n// Comments: Added option to output in inch or mm\n// Date:... Oct 28 2019\n// Comments: Corrected feedrate conversion\n//           - inch/s to inch/min\n//...........- mm/s to mm/min\n//\n// Updated: Neil Gershenfeld\n// Date: Oct 28 2020\n// Comments: added mm/s vs mm/min option\n//\n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'path to G-code'\n//\n// initialization\n//\nvar init = function() {\n   mod.cutspeed.value = '2.5'\n   mod.plungespeed.value = '2.5'\n   mod.jogheight.value = '2'\n   mod.spindlespeed.value = '11000'\n   mod.tool.value = '1'\n   mod.coolantoff.checked = true\n   mod.formatMm.checked = true\n   mod.unitMinutes.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   path:{type:'',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.path = evt.detail.path\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         make_path()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   file:{type:'',\n      event:function(str){\n         obj = {}\n         obj.name = mod.name+\".nc\"\n         obj.contents = str\n         mods.output(mod,'file',obj)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // cut speed\n   //\n   div.appendChild(document.createTextNode('cut speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.cutspeed = input\n   div.appendChild(document.createTextNode(' (mm/s)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // plunge speed\n   //\n   div.appendChild(document.createTextNode('plunge speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.plungespeed = input\n   div.appendChild(document.createTextNode(' (mm/s)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // jog height\n   //\n   div.appendChild(document.createTextNode('jog height: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.jogheight = input\n   div.appendChild(document.createTextNode(' (mm)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // spindle speed\n   //\n   div.appendChild(document.createTextNode('spindle speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.spindlespeed = input\n   div.appendChild(document.createTextNode(' (RPM)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // tool\n   //\n   div.appendChild(document.createTextNode('tool: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.tool = input\n   div.appendChild(document.createElement('br'))\n   //\n   // coolant\n   //\n   div.appendChild(document.createTextNode('coolant:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'coolant'\n      input.id = mod.div.id+'coolanton'\n      div.appendChild(input)\n      mod.coolanton = input\n   div.appendChild(document.createTextNode('on'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'coolant'\n      input.id = mod.div.id+'coolantoff'\n      div.appendChild(input)\n      mod.coolantoff = input\n   div.appendChild(document.createTextNode('off'))\n   div.appendChild(document.createElement('br'))\n   //\n   // inch or mm format\n   //\n   div.appendChild(document.createTextNode('format:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'format'\n      input.id = mod.div.id+'formatInch'\n      input.checked = true\n      div.appendChild(input)\n      mod.formatInch = input\n   div.appendChild(document.createTextNode('inch'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'format'\n      input.id = mod.div.id+'formatMm'\n      div.appendChild(input)\n      mod.formatMm = input\n   div.appendChild(document.createTextNode('mm'))\n   div.appendChild(document.createElement('br'))\n   //\n   // second or minute rate units \n   //\n   div.appendChild(document.createTextNode('rate units:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'units'\n      input.id = mod.div.id+'unitSeconds'\n      input.checked = true\n      div.appendChild(input)\n      mod.unitSeconds = input\n   div.appendChild(document.createTextNode('second'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'units'\n      input.id = mod.div.id+'unitMinutes'\n      div.appendChild(input)\n      mod.unitMinutes = input\n   div.appendChild(document.createTextNode('minute'))\n   }\n//\n// local functions\n//\nfunction make_path() {\n   var dx = 25.4*mod.width/mod.dpi\n   var cut_speed = parseFloat(mod.cutspeed.value)\n   var plunge_speed = parseFloat(mod.plungespeed.value)\n   var jog_height = parseFloat(mod.jogheight.value)\n   var nx = mod.width\n   var scale = dx/(nx-1)\n   var in_mm_scale = 1\n   if (mod.formatInch.checked) {\n      dx /= 25.4\n      scale /= 25.4\n      cut_speed /= 25.4\n      plunge_speed /= 25.4\n      jog_height /= 25.4\n      }\n   if (mod.unitMinutes.checked) {\n      cut_speed *= 60\n      plunge_speed *= 60\n      }\n   var spindle_speed = parseFloat(mod.spindlespeed.value)\n   var tool = parseInt(mod.tool.value)\n   str = \"%\\n\" // tape start\n   str += \"G17\\n\" // xy plane\n   if (mod.formatInch.checked)\n      str += \"G20\\n\" // inches\n   if (mod.formatMm.checked)\n      str += \"G21\\n\" // mm\n   str += \"G40\\n\" // cancel tool radius compensation\n   str += \"G49\\n\" // cancel tool length compensation\n   str += \"G54\\n\" // coordinate system 1\n   str += \"G80\\n\" // cancel canned cycles\n   str += \"G90\\n\" // absolute coordinates\n   str += \"G94\\n\" // feed/minute units\n   str += \"T\"+tool+\"M06\\n\" // tool selection, tool change\n   str += \"F\"+cut_speed.toFixed(4)+\"\\n\" // feed rate\n   str += \"S\"+spindle_speed+\"\\n\" // spindle speed\n   if (mod.coolanton.checked)\n      str += \"M08\\n\" // coolant on\n   str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\" // move up before starting spindle\n   str += \"M03\\n\" // spindle on clockwise\n　//str += \"G04 P1000\\n\" // give spindle 1 second to spin up................comment out\n   //str += \"G04 P1\\n\" // give spindle 1 Millisecond to spin up..............comment out\n   //\n   // follow segments\n   //\n   for (var seg = 0; seg < mod.path.length; ++seg) {\n      //\n      // move up to starting point\n      //\n      x = scale*mod.path[seg][0][0]\n      y = scale*mod.path[seg][0][1]\n      str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\"\n      str += \"G00X\"+x.toFixed(4)+\"Y\"+y.toFixed(4)+\"Z\"+jog_height.toFixed(4)+\"\\n\"\n      //\n      // move down\n      //\n      z = scale*mod.path[seg][0][2]\n      str += \"G01Z\"+z.toFixed(4)+\" F\"+plunge_speed.toFixed(4)+\"\\n\"\n      str += \"F\"+cut_speed.toFixed(4)+\"\\n\" //restore xy feed rate\n      for (var pt = 1; pt < mod.path[seg].length; ++pt) {\n         //\n         // move to next point\n         //\n         x = scale*mod.path[seg][pt][0]\n         y = scale*mod.path[seg][pt][1]\n         z = scale*mod.path[seg][pt][2]\n         str += \"G01X\"+x.toFixed(4)+\"Y\"+y.toFixed(4)+\"Z\"+z.toFixed(4)+\"\\n\"\n         }\n      }\n   //\n   // finish\n   //\n   str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\" // move up before stopping spindle\n   str += \"M05\\n\" // spindle stop\n   if (mod.coolanton.checked)\n      str += \"M09\\n\" // coolant off\n   str += \"M30\\n\" // program end and reset\n   str += \"%\\n\" // tape end\n   //\n   // output file\n   //\n   outputs.file.event(str)\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n\n","top":"831.1683166499946","left":"1985.839479173399","filename":"modules/path/formats/g-code","inputs":{},"outputs":{}}},"links":["{\"source\":\"{\\\"id\\\":\\\"0.07944144280928633\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8903773266711255\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.47383876715576023\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"distances\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"distances\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.07944144280928633\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.6488303557466412\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.47383876715576023\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"offset\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"offset\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"toolpath\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.2892270043957246\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"toolpath\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.8903773266711255\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.10309904694903338\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.10309904694903338\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"path\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"path\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.992472539363189\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"settings\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"settings\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.5022735462618486\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.6488303557466412\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.5022735462618486\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"imageInfo\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"imageInfo\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.057765477464730264\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"SVG\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.5022735462618486\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"SVG\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.2892270043957246\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"toolpath\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9604471250218796\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"path\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9604471250218796\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"file\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8622681794886853\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"file\\\"}\"}"]}))
+window.mods_prog_load(prog)
+</script>
+</body>
+</html>
diff --git a/docs/Instruction/images/proverXL/mods/mill_2D_PCB_svg.txt b/docs/Instruction/images/proverXL/mods/mill_2D_PCB_svg.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9cd2ee7fee28a107ee8bc657d1787dbb62eb6851
--- /dev/null
+++ b/docs/Instruction/images/proverXL/mods/mill_2D_PCB_svg.txt
@@ -0,0 +1 @@
+{"modules":{"0.47383876715576023":{"definition":"//\n// distance transform \n//    assumes thresholded image, with zero intensity exterior\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'distance transform'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         distance_transform()}}}\n//\n// outputs\n//\nvar outputs = {\n   distances:{type:'F32',\n      event:function(){\n         mod.distances.height = mod.input.height\n         mod.distances.width = mod.input.width\n         mods.output(mod,'distances',mod.distances)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   div.appendChild(document.createElement('br'))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// distance transform function\n//\nfunction distance_transform() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      mod.distances = new Float32Array(evt.data.buffer)\n      var imgbuf = new Uint8ClampedArray(h*w*4)\n      var dmax = -Number.MAX_VALUE\n      for (var y = 0; y < h; ++y) {\n         for (var x = 0; x < w; ++x) {\n            if (mod.distances[(h-1-y)*w+x] > dmax)\n               dmax = mod.distances[(h-1-y)*w+x]\n            }\n         }\n      var i\n      for (var y = 0; y < h; ++y) {\n         for (var x = 0; x < w; ++x) {\n            i = 255*mod.distances[(h-1-y)*w+x]/dmax\n            imgbuf[(h-1-y)*w*4+x*4+0] = i\n            imgbuf[(h-1-y)*w*4+x*4+1] = i\n            imgbuf[(h-1-y)*w*4+x*4+2] = i\n            imgbuf[(h-1-y)*w*4+x*4+3] = 255\n            }\n         }\n      var imgdata = new ImageData(imgbuf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.distances.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var ctx = mod.img.getContext(\"2d\")\n   ctx.putImageData(mod.input,0,0)\n   var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,\n      buffer:img.data.buffer},\n      [img.data.buffer])\n   }\n//\n// distance transform worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var ny = evt.data.height\n      var nx = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Float32Array(nx*ny)\n      function distance(g,x,y,i) {\n         return ((y-i)*(y-i)+g[i][x]*g[i][x])\n         }\n      function intersection(g,x,y0,y1) {\n         return ((g[y0][x]*g[y0][x]-g[y1][x]*g[y1][x]+y0*y0-y1*y1)/(2.0*(y0-y1)))\n         }\n      //\n      // allocate arrays\n      //\n      var g = []\n      for (var y = 0; y < ny; ++y)\n         g[y] = new Uint32Array(nx)\n      var h = []\n      for (var y = 0; y < ny; ++y)\n         h[y] = new Uint32Array(nx)\n      var distances = []\n      for (var y = 0; y < ny; ++y)\n         distances[y] = new Uint32Array(nx)\n      var starts = new Uint32Array(ny)\n      var minimums = new Uint32Array(ny)\n      var d\n      //\n      // column scan\n      //  \n      for (var y = 0; y < ny; ++y) {\n         //\n         // right pass\n         //\n         var closest = -nx\n         for (var x = 0; x < nx; ++x) {\n            if (input[(ny-1-y)*nx*4+x*4+0] != 0) {\n               g[y][x] = 0\n               closest = x\n               }\n            else\n               g[y][x] = (x-closest)\n            }\n         //\n         // left pass\n         //\n         closest = 2*nx\n         for (var x = (nx-1); x >= 0; --x) {\n            if (input[(ny-1-y)*nx*4+x*4+0] != 0)\n               closest = x\n            else {\n               d = (closest-x)\n               if (d < g[y][x])\n                  g[y][x] = d\n               }\n            }\n         }\n      //\n      // row scan\n      //\n      for (var x = 0; x < nx; ++x) {\n         var segment = 0\n         starts[0] = 0\n         minimums[0] = 0\n         //\n         // down \n         //\n         for (var y = 1; y < ny; ++y) {\n            while ((segment >= 0) &&\n               (distance(g,x,starts[segment],minimums[segment]) > distance(g,x,starts[segment],y)))\n               segment -= 1\n            if (segment < 0) {\n               segment = 0\n               minimums[0] = y\n               }\n            else {\n               newstart = 1+intersection(g,x,minimums[segment],y)\n               if (newstart < ny) {\n                  segment += 1\n                  minimums[segment] = y\n                  starts[segment] = newstart\n                  }\n               }\n            }\n         //\n         // up \n         //\n         for (var y = (ny-1); y >= 0; --y) {\n            d = Math.sqrt(distance(g,x,y,minimums[segment]))\n            output[(ny-1-y)*nx+x] = d\n            if (y == starts[segment])\n               segment -= 1\n            }\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"390.58350726962306","left":"3347.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.07944144280928633":{"definition":"//\n// edge detect\n//    green = interior, blue = exterior, red = boundary\n//    assumes input is thresholded\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'edge detect'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         edge_detect()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('green:interior, blue:exterior, red:boundary'))\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// edge detect\n//\nfunction edge_detect() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   webworker.postMessage({worker:worker.toString(),\n      height:mod.input.height,width:mod.input.width,\n      buffer:mod.input.data.buffer},\n      [mod.input.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Uint8ClampedArray(h*w*4)\n      var i00,i0m,i0p,im0,ip0,imm,imp,ipm,ipp,row,col\n      //\n      // find edges - interior\n      //\n      for (row = 1; row < (h-1); ++row) {\n         for (col = 1; col < (w-1); ++col) {\n            i00 = (input[(h-1-row)*w*4+col*4+0] \n                      +input[(h-1-row)*w*4+col*4+1] \n                      +input[(h-1-row)*w*4+col*4+2])\n            i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                      +input[(h-1-row)*w*4+(col+1)*4+1] \n                      +input[(h-1-row)*w*4+(col+1)*4+2])\n            ip0 = (input[(h-2-row)*w*4+col*4+0] \n                      +input[(h-2-row)*w*4+col*4+1] \n                      +input[(h-2-row)*w*4+col*4+2])\n            ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                      +input[(h-2-row)*w*4+(col+1)*4+1] \n                      +input[(h-2-row)*w*4+(col+1)*4+2])\n            i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                      +input[(h-1-row)*w*4+(col-1)*4+1] \n                      +input[(h-1-row)*w*4+(col-1)*4+2])\n            im0 = (input[(h-row)*w*4+col*4+0] \n                      +input[(h-row)*w*4+col*4+1] \n                      +input[(h-row)*w*4+col*4+2])\n            imm = (input[(h-row)*w*4+(col-1)*4+0] \n                      +input[(h-row)*w*4+(col-1)*4+1] \n                      +input[(h-row)*w*4+(col-1)*4+2])\n            imp = (input[(h-row)*w*4+(col+1)*4+0] \n                      +input[(h-row)*w*4+(col+1)*4+1] \n                      +input[(h-row)*w*4+(col+1)*4+2])\n            ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                      +input[(h-2-row)*w*4+(col-1)*4+1] \n                      +input[(h-2-row)*w*4+(col-1)*4+2])\n            if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp) \n               || (i00 != i0m) || (i00 != im0) || (i00 != imm)\n               || (i00 != imp) || (i00 != ipm)) {\n               output[(h-1-row)*w*4+col*4+0] = 255\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else if (i00 == 0) {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 255\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 255\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      //\n      // left and right edges\n      //\n      for (row = 1; row < (h-1); ++row) {\n         col = w-1\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         imm = (input[(h-row)*w*4+(col-1)*4+0] \n                   +input[(h-row)*w*4+(col-1)*4+1] \n                   +input[(h-row)*w*4+(col-1)*4+2])\n         ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                   +input[(h-2-row)*w*4+(col-1)*4+1] \n                   +input[(h-2-row)*w*4+(col-1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n        if ((i00 != i0m) || (i00 != ip0) || (i00 != ipm) \n           || (i00 != im0) || (i00 != imm)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         col = 0\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         imp = (input[(h-row)*w*4+(col+1)*4+0] \n                   +input[(h-row)*w*4+(col+1)*4+1] \n                   +input[(h-row)*w*4+(col+1)*4+2])\n         ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                   +input[(h-2-row)*w*4+(col+1)*4+1] \n                   +input[(h-2-row)*w*4+(col+1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n        if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp) \n           || (i00 != im0) || (i00 != imp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         }\n      //\n      // top and bottom edges\n      //\n      for (col = 1; col < (w-1); ++col) {\n         row = h-1\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         imm = (input[(h-row)*w*4+(col-1)*4+0] \n                   +input[(h-row)*w*4+(col-1)*4+1] \n                   +input[(h-row)*w*4+(col-1)*4+2])\n         im0 = (input[(h-row)*w*4+col*4+0] \n                   +input[(h-row)*w*4+col*4+1] \n                   +input[(h-row)*w*4+col*4+2])\n         imp = (input[(h-row)*w*4+(col+1)*4+0] \n                   +input[(h-row)*w*4+(col+1)*4+1] \n                   +input[(h-row)*w*4+(col+1)*4+2])\n        if ((i00 != i0m) || (i00 != i0p) || (i00 != imm) \n           || (i00 != im0) || (i00 != imp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         row = 0\n         i00 = (input[(h-1-row)*w*4+col*4+0] \n                   +input[(h-1-row)*w*4+col*4+1] \n                   +input[(h-1-row)*w*4+col*4+2])\n         i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                   +input[(h-1-row)*w*4+(col-1)*4+1] \n                   +input[(h-1-row)*w*4+(col-1)*4+2])\n         i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                   +input[(h-1-row)*w*4+(col+1)*4+1] \n                   +input[(h-1-row)*w*4+(col+1)*4+2])\n         ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                   +input[(h-2-row)*w*4+(col-1)*4+1] \n                   +input[(h-2-row)*w*4+(col-1)*4+2])\n         ip0 = (input[(h-2-row)*w*4+col*4+0] \n                   +input[(h-2-row)*w*4+col*4+1] \n                   +input[(h-2-row)*w*4+col*4+2])\n         ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                   +input[(h-2-row)*w*4+(col+1)*4+1] \n                   +input[(h-2-row)*w*4+(col+1)*4+2])\n        if ((i00 != i0m) || (i00 != i0p) || (i00 != ipm) \n           || (i00 != ip0) || (i00 != ipp)) {\n           output[(h-1-row)*w*4+col*4+0] = 255\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else if (i00 == 0) {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 0\n           output[(h-1-row)*w*4+col*4+2] = 255\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n        else {\n           output[(h-1-row)*w*4+col*4+0] = 0\n           output[(h-1-row)*w*4+col*4+1] = 255\n           output[(h-1-row)*w*4+col*4+2] = 0\n           output[(h-1-row)*w*4+col*4+3] = 255\n           }\n         }\n      //\n      // corners\n      //\n      row = 0\n      col = 0\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                +input[(h-1-row)*w*4+(col+1)*4+1] \n                +input[(h-1-row)*w*4+(col+1)*4+2])\n      ip0 = (input[(h-2-row)*w*4+col*4+0] \n                +input[(h-2-row)*w*4+col*4+1] \n                +input[(h-2-row)*w*4+col*4+2])\n      ipp = (input[(h-2-row)*w*4+(col+1)*4+0] \n                +input[(h-2-row)*w*4+(col+1)*4+1] \n                +input[(h-2-row)*w*4+(col+1)*4+2])\n      if ((i00 != i0p) || (i00 != ip0) || (i00 != ipp)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = 0\n      col = w-1\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                +input[(h-1-row)*w*4+(col-1)*4+1] \n                +input[(h-1-row)*w*4+(col-1)*4+2])\n      ip0 = (input[(h-2-row)*w*4+col*4+0] \n                +input[(h-2-row)*w*4+col*4+1] \n                +input[(h-2-row)*w*4+col*4+2])\n      ipm = (input[(h-2-row)*w*4+(col-1)*4+0] \n                +input[(h-2-row)*w*4+(col-1)*4+1] \n                +input[(h-2-row)*w*4+(col-1)*4+2])\n      if ((i00 != i0m) || (i00 != ip0) || (i00 != ipm)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = h-1\n      col = 0\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0p = (input[(h-1-row)*w*4+(col+1)*4+0] \n                +input[(h-1-row)*w*4+(col+1)*4+1] \n                +input[(h-1-row)*w*4+(col+1)*4+2])\n      im0 = (input[(h-row)*w*4+col*4+0] \n                +input[(h-row)*w*4+col*4+1] \n                +input[(h-row)*w*4+col*4+2])\n      imp = (input[(h-row)*w*4+(col+1)*4+0] \n                +input[(h-row)*w*4+(col+1)*4+1] \n                +input[(h-row)*w*4+(col+1)*4+2])\n      if ((i00 != i0p) || (i00 != im0) || (i00 != imp)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      row = h-1\n      col = w-1\n      i00 = (input[(h-1-row)*w*4+col*4+0] \n                +input[(h-1-row)*w*4+col*4+1] \n                +input[(h-1-row)*w*4+col*4+2])\n      i0m = (input[(h-1-row)*w*4+(col-1)*4+0] \n                +input[(h-1-row)*w*4+(col-1)*4+1] \n                +input[(h-1-row)*w*4+(col-1)*4+2])\n      im0 = (input[(h-row)*w*4+col*4+0] \n                +input[(h-row)*w*4+col*4+1] \n                +input[(h-row)*w*4+col*4+2])\n      imm = (input[(h-row)*w*4+(col-1)*4+0] \n                +input[(h-row)*w*4+(col-1)*4+1] \n                +input[(h-row)*w*4+(col-1)*4+2])\n      if ((i00 != i0m) || (i00 != im0) || (i00 != imm)) {\n         output[(h-1-row)*w*4+col*4+0] = 255\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else if (i00 == 0) {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 0\n         output[(h-1-row)*w*4+col*4+2] = 255\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      else {\n         output[(h-1-row)*w*4+col*4+0] = 0\n         output[(h-1-row)*w*4+col*4+1] = 255\n         output[(h-1-row)*w*4+col*4+2] = 0\n         output[(h-1-row)*w*4+col*4+3] = 255\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1007.5835072696229","left":"3805.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.8903773266711255":{"definition":"//\n// orient edges\n//    input is green:interior, blue:exterior, red:boundary\n//    output is red 128:north,64:south, green 128:east,64:west, blue 128:start,64:stop\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'orient edges'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         var ctx = mod.display.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         orient_edges()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // off-screen display canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.display = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('red:north, dark red:south'))\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('green:east, dark green:west'))\n         win.document.body.appendChild(document.createElement('br'))\n         win.document.body.appendChild(document.createTextNode('blue:start, dark blue:stop'))\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.display,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// orient edges\n//\nfunction orient_edges() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      var disp = new Uint8ClampedArray(evt.data.display)\n      var dispdata = new ImageData(disp,w,h)\n      var ctx = mod.display.getContext(\"2d\")\n      ctx.putImageData(dispdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var w = mod.canvas.width\n      var h = mod.canvas.height\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,w,h)\n      ctx.drawImage(mod.display,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,\n      buffer:mod.input.data.buffer},\n      [mod.input.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var output = new Uint8ClampedArray(h*w*4)\n      var row,col\n      var boundary = 0\n      var interior = 1\n      var exterior = 2\n      var alpha = 3\n      var northsouth = 0\n      var north = 128\n      var south = 64\n      var eastwest = 1\n      var east = 128\n      var west = 64\n      var startstop = 2\n      var start = 128\n      var stop = 64\n      //\n      // orient body states\n      //\n      for (row = 1; row < (h-1); ++row) {\n         for (col = 1; col < (w-1); ++col) {\n            output[(h-1-row)*w*4+col*4+northsouth] = 0\n            output[(h-1-row)*w*4+col*4+eastwest] = 0\n            output[(h-1-row)*w*4+col*4+startstop] = 0\n            output[(h-1-row)*w*4+col*4+alpha] = 255\n            if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n               if ((input[(h-1-(row+1))*w*4+(col)*4+boundary] != 0)\n                  && ((input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)\n                  || (input[(h-1-(row+1))*w*4+(col+1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+northsouth] |= north\n               if ((input[(h-1-(row-1))*w*4+(col)*4+boundary] != 0)\n                  && ((input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)\n                  || (input[(h-1-(row-1))*w*4+(col-1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+northsouth] |= south\n               if ((input[(h-1-(row))*w*4+(col+1)*4+boundary] != 0)\n                  && ((input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)\n                  || (input[(h-1-(row-1))*w*4+(col+1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+eastwest] |= east\n               if ((input[(h-1-(row))*w*4+(col-1)*4+boundary] != 0)\n                  && ((input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)\n                  || (input[(h-1-(row+1))*w*4+(col-1)*4+interior] != 0)))\n                  output[(h-1-row)*w*4+col*4+eastwest] |= west\n               }\n            }\n         }\n      //\n      // orient edge states\n      //\n      for (col = 1; col < (w-1); ++col) {\n         row = 0\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if ((input[(h-1-(row+1))*w*4+(col)*4+boundary] != 0)\n               && (input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+northsouth] |= north\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            if (input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            }\n         row = h-1\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if (input[(h-1-(row))*w*4+(col+1)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            if ((input[(h-1-(row-1))*w*4+(col)*4+boundary] != 0)\n               && (input[(h-1-(row))*w*4+(col-1)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+northsouth] |= south\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            }\n         }\n      for (row = 1; row < (h-1); ++row) {\n         col = 0\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if ((input[(h-1-(row))*w*4+(col+1)*4+boundary] != 0)\n               && (input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+eastwest] |= east\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            if (input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            }\n         col = w-1\n         output[(h-1-row)*w*4+col*4+northsouth] = 0\n         output[(h-1-row)*w*4+col*4+eastwest] = 0\n         output[(h-1-row)*w*4+col*4+startstop] = 0\n         output[(h-1-row)*w*4+col*4+alpha] = 255\n         if (input[(h-1-(row))*w*4+(col)*4+boundary] != 0) {\n            if (input[(h-1-(row-1))*w*4+(col)*4+interior] != 0)\n               output[(h-1-row)*w*4+col*4+startstop] |= stop\n            if ((input[(h-1-(row))*w*4+(col-1)*4+boundary] != 0)\n               && (input[(h-1-(row+1))*w*4+(col)*4+interior] != 0)) {\n               output[(h-1-row)*w*4+col*4+eastwest] |= west\n               output[(h-1-row)*w*4+col*4+startstop] |= start\n               }\n            }\n         }\n      //\n      // orient corner states (todo)\n      //\n      row = 0\n      col = 0\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = h-1\n      col = 0\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = 0\n      col = w-1\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      row = h-1\n      col = w-1\n      output[(h-1-row)*w*4+col*4+northsouth] = 0\n      output[(h-1-row)*w*4+col*4+eastwest] = 0\n      output[(h-1-row)*w*4+col*4+startstop] = 0\n      output[(h-1-row)*w*4+col*4+alpha] = 255\n      //\n      // invert background for display\n      //\n      var display = new Uint8ClampedArray(h*w*4)\n      var r,g,b,i\n      for (row = 0; row < h; ++row) {\n         for (col = 0; col < w; ++col) {\n            r = output[(h-1-row)*w*4+col*4+0]\n            g = output[(h-1-row)*w*4+col*4+1]\n            b = output[(h-1-row)*w*4+col*4+2]\n            i = r+g+b\n            if (i != 0) {            \n               display[(h-1-row)*w*4+col*4+0] = output[(h-1-row)*w*4+col*4+0]\n               display[(h-1-row)*w*4+col*4+1] = output[(h-1-row)*w*4+col*4+1]\n               display[(h-1-row)*w*4+col*4+2] = output[(h-1-row)*w*4+col*4+2]\n               display[(h-1-row)*w*4+col*4+3] = output[(h-1-row)*w*4+col*4+3]\n               }\n            else {\n               display[(h-1-row)*w*4+col*4+0] = 255\n               display[(h-1-row)*w*4+col*4+1] = 255\n               display[(h-1-row)*w*4+col*4+2] = 255\n               display[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      //\n      // return output\n      //\n      self.postMessage({buffer:output.buffer,display:display.buffer},[output.buffer,display.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"877.5835072696229","left":"3374.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.3135579179893032":{"definition":"//\n// distance transform \n//    assumes thresholded image, with zero intensity exterior\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'offset'\n//\n// initialization\n//\nvar init = function() {\n   mod.offset.value = ''\n   }\n//\n// inputs\n//\nvar inputs = {\n   distances:{type:'F32',\n      event:function(evt){\n         mod.distances = evt.detail\n         var h = mod.distances.height\n         var w = mod.distances.width\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.height = mod.distances.height \n         ctx.canvas.width = mod.distances.width\n         if (mod.offset.value != '')\n            offset()\n         }},\n   offset:{type:'number',\n      event:function(evt){\n         mod.offset.value = evt.detail\n         offset()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // offset value\n   //\n   div.appendChild(document.createTextNode('offset (pixels): '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         offset()\n         })\n      div.appendChild(input)\n      mod.offset = input\n   //\n   // view button\n   //\n   div.appendChild(document.createElement('br'))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// offset\n//\nfunction offset() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.distances.height\n      var w = mod.distances.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var offset = parseFloat(mod.offset.value)\n   webworker.postMessage({\n      height:mod.distances.height,width:mod.distances.width,\n      offset:offset,buffer:mod.distances.buffer})\n   }\n//\n// offset worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var offset = evt.data.offset\n      var input = new Float32Array(evt.data.buffer)\n      var output = new Uint8ClampedArray(4*h*w)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            if (input[(h-1-row)*w+col] <= offset) {\n               output[(h-1-row)*w*4+col*4+0] = 255\n               output[(h-1-row)*w*4+col*4+1] = 255\n               output[(h-1-row)*w*4+col*4+2] = 255\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            else {\n               output[(h-1-row)*w*4+col*4+0] = 0\n               output[(h-1-row)*w*4+col*4+1] = 0\n               output[(h-1-row)*w*4+col*4+2] = 0\n               output[(h-1-row)*w*4+col*4+3] = 255\n               }\n            }\n         }\n      self.postMessage({buffer:output.buffer},[output.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"490.58350726962306","left":"3806.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.6488303557466412":{"definition":"//\n// image threshold\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2015,6\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the fab modules \n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'image threshold'\n//\n// initialization\n//\nvar init = function() {\n   mod.threshold.value = 0.5\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         threshold_image()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // threshold value\n   //\n   div.appendChild(document.createTextNode('threshold (0-1): '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         threshold_image()\n         })\n      div.appendChild(input)\n      mod.threshold = input\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// threshold image\n//\nfunction threshold_image() {\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var t = parseFloat(mod.threshold.value)\n   var ctx = mod.img.getContext(\"2d\")\n   ctx.putImageData(mod.input,0,0)\n   var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,threshold:t,\n      buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var t = evt.data.threshold\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var r,g,b,a,i\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            r = buf[(h-1-row)*w*4+col*4+0] \n            g = buf[(h-1-row)*w*4+col*4+1] \n            b = buf[(h-1-row)*w*4+col*4+2] \n            a = buf[(h-1-row)*w*4+col*4+3] \n            i = (r+g+b)/(3*255)\n            if (a == 0)\n               val = 255\n            else if (i > t)\n               var val = 255\n            else\n               var val = 0\n            buf[(h-1-row)*w*4+col*4+0] = val\n            buf[(h-1-row)*w*4+col*4+1] = val\n            buf[(h-1-row)*w*4+col*4+2] = val\n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"523.583507269623","left":"2835.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.2892270043957246":{"definition":"//\n// view toolpath\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// todo:\n//    erase and update new path\n//    show depth info\n//    show size\n//    calculate camera far\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'view toolpath'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   toolpath:{type:'object',\n      event:function(evt){\n         mod.path = evt.detail.path\n         mod.name = evt.detail.name\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         mod.depth = evt.detail.depth\n         show_path_info()\n         show_path()\n         outputs.toolpath.event()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   toolpath:{type:'object',\n      event:function(){\n         cmd = {}\n         cmd.path = mod.path\n         cmd.name = mod.name\n         cmd.dpi = mod.dpi\n         cmd.width = mod.width\n         cmd.height = mod.height\n         mods.output(mod,'toolpath',cmd)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // info\n   //\n   var text = document.createTextNode('name: ')\n      div.appendChild(text)\n      mod.nametext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(mm)')\n      div.appendChild(text)\n      mod.mmtext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(in)')\n      div.appendChild(text)\n      mod.intext = text\n   //\n   // view\n   //   \n   div.appendChild(document.createElement('br'))   \n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n         var text = document.createTextNode('view')\n            span.appendChild(text)\n         btn.appendChild(span)\n      btn.addEventListener('click',function(){\n         open_view_window()\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// show_path_info\n//\nfunction show_path_info() {\n   mod.nametext.nodeValue = 'name: '+mod.name\n   var width = (25.4*mod.width/mod.dpi).toFixed(3)\n   var height = (25.4*mod.height/mod.dpi).toFixed(3)\n   var depth = (25.4*mod.depth/mod.dpi).toFixed(3)\n   if (mod.depth == undefined)\n      mod.mmtext.nodeValue = width+' x '+height+' (mm)'\n   else\n      mod.mmtext.nodeValue = width+' x '+height+' x '+depth+' (mm)'\n   var width = (mod.width/mod.dpi).toFixed(3)\n   var height = (mod.height/mod.dpi).toFixed(3)\n   var depth = (mod.depth/mod.dpi).toFixed(3)\n   if (mod.depth == undefined)\n      mod.intext.nodeValue = width+' x '+height+' (in)'\n   else\n      mod.intext.nodeValue = width+' x '+height+' x '+depth+' (in)'\n   mods.fit(mod.div)\n   }\n//\n// show_path\n//\nfunction show_path() {\n   var scene = mod.scene\n   var camera = mod.camera\n   var renderer = mod.renderer\n   //\n   // check if view window open\n   //\n   if (mod.win == undefined) {\n      open_view_window()\n      return\n      }\n   //\n   // check for path\n   //\n   if (mod.path == undefined)\n      return\n   //\n   // clear scene, leave camera\n   //\n   var length = scene.children.length\n   for (var c = (length-1); c > 1; --c) {\n      scene.remove(scene.children[c])\n      }\n   //\n   // fit camera\n   //\n   mod.thetaxy = 0\n   mod.thetaz = 0\n   mod.r = mod.height/2\n   mod.x0 = mod.width/2\n   mod.y0 = mod.height/2\n   camera.position.set(mod.x0,mod.y0,mod.r)\n   camera.up = new THREE.Vector3(0,1,0)\n   camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n   camera.updateProjectionMatrix()\n   //\n   // draw segments\n   //\n   var arrow_size = 1+mod.width/200\n   var path = mod.path\n   for (var segment = 0; segment < path.length; ++segment) {\n      if (segment > 0)\n         add_arrow(path[segment-1][path[segment-1].length-1],path[segment][0],0xff0000,arrow_size)         \n      for (var point = 1; point < path[segment].length; ++point) {\n         add_arrow(path[segment][point-1],path[segment][point],0x0000ff,arrow_size)\n         }\n      }\n   //\n   // add axes\n   //\n   var length = mod.height/10\n   add_arrow([0,0,0],[length,0,0],0xff0000,arrow_size)\n   add_arrow([0,0,0],[0,length,0],0x00ff00,arrow_size)\n   add_arrow([0,0,0],[0,0,length],0x0000ff,arrow_size)\n   //\n   // render\n   //\n   update()\n   //\n   // add_arrow\n   //\n   function add_arrow(start,stop,color,size) {\n      var origin = new THREE.Vector3().fromArray(start)\n      if (mod.depth == undefined)\n         origin.z = 0\n      var end  = new THREE.Vector3().fromArray(stop)\n      if (mod.depth == undefined)\n         end.z = 0\n      var length = new THREE.Vector3().subVectors(end,origin).length()\n      if (length <= size) {\n         add_line(origin,end,color)\n         //length = 1.1*size\n         return\n         }\n      var direction = new THREE.Vector3().subVectors(end,origin).normalize()\n      var arrow = new THREE.ArrowHelper(direction,origin,length,color,size,size)\n      scene.add(arrow)\n      }\n   //\n   // add_line\n   //\n   function add_line(start,stop,colorhex) {\n      var geometry = new THREE.Geometry()\n      geometry.vertices.push(start,stop)\n      var material = new THREE.LineBasicMaterial({color:colorhex})\n      var line = new THREE.Line(geometry,material)\n      scene.add(line)\n      }\n   //\n   // update\n   //\n   function update() {\n\t   renderer.render(scene,camera)\n      }\n   }\n//\n// open_view_window\n//\nfunction open_view_window() {\n   //\n   // globals\n   //\n   var container,scene,camera,renderer,win,controls\n   //\n   // open the window\n   //\n   open_window()\n   //\n   // open_window\n   //\n   function open_window() {\n      //\n      // open window\n      //\n      win = window.open('')\n      mod.win = win\n      //\n      // load three.js\n      //\n      var script = document.createElement('script')\n      script.type = 'text/javascript'\n      script.onload = init_window\n      script.src = 'js/three.js/three.min.js'\n      mod.div.appendChild(script)\n      }\n   //\n   // init_window\n   //\n   function init_window() {\n      //\n      // close button\n      //\n      var btn = document.createElement('button')\n         btn.appendChild(document.createTextNode('close'))\n         btn.style.padding = mods.ui.padding\n         btn.style.margin = 1\n         btn.addEventListener('click',function(){\n            win.close()\n            mod.win = undefined\n            })\n         win.document.body.appendChild(btn)\n      //\n      // label text\n      //\n      var text = win.document.createTextNode(' left: pan, right: rotate, scroll: zoom')\n         win.document.body.appendChild(text)\n      //\n      // GL container\n      //\n      win.document.body.appendChild(document.createElement('br'))   \n      container = win.document.createElement('div')\n      container.style.overflow = 'hidden'\n      win.document.body.appendChild(container)\n      //\n      // event handlers\n      //\n      container.addEventListener('contextmenu',context_menu)\n      container.addEventListener('mousedown',mouse_down)\n      container.addEventListener('mouseup',mouse_up)\n      container.addEventListener('mousemove',mouse_move)\n      container.addEventListener('wheel',mouse_wheel)\n      //\n      // add scene\n      //\n\t   scene = new THREE.Scene()\n\t   mod.scene = scene\n\t   var width = win.innerWidth\n\t   var height = win.innerHeight\n\t   var aspect = width/height\n\t   var near = 0.1\n\t   var far = 1000000\n\t   camera = new THREE.PerspectiveCamera(90,aspect,near,far)\n\t   mod.camera = camera\n\t   scene.add(camera)\n\t   //\n\t   // add renderer\n\t   //\n      renderer = new THREE.WebGLRenderer({antialias:true})\n      mod.renderer = renderer\n      renderer.setClearColor(0xffffff)\n\t   renderer.setSize(width,height)\n\t   container.appendChild(renderer.domElement)\n      //\n      // show the path if available\n      //\n      show_path()\n      }\n   //\n   // context_menu\n   //\n   function context_menu(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      return (false)\n      }\n   //\n   // mouse_down\n   //\n   function mouse_down(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      mod.button = evt.button\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      }\n   //\n   // mouse_up\n   //\n   function mouse_up(evt) {\n      mod.button = undefined\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      }\n   //\n   // mouse_move\n   //\n   function mouse_move(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      var dx = evt.clientX-mod.x\n      var dy = evt.clientY-mod.y\n      mod.x = evt.clientX\n      mod.y = evt.clientY\n      if (mod.button == 0) {\n         mod.x0 += \n            Math.sin(mod.thetaz)*mod.height*dy/win.innerHeight\n            -Math.cos(mod.thetaz)*mod.width*dx/win.innerWidth\n         mod.y0 += \n            Math.cos(mod.thetaz)*mod.height*dy/win.innerHeight\n            +Math.sin(mod.thetaz)*mod.width*dx/win.innerWidth\n         camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t      camera.up = new THREE.Vector3(Math.sin(mod.thetaz),Math.cos(mod.thetaz),0)\n\t      camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n         camera.updateProjectionMatrix()\n\t      renderer.render(scene,camera)\n\t      }\n      else if (mod.button == 2) {\n         mod.thetaxy += dy/win.innerHeight\n         mod.thetaz += dx/win.innerWidth\n         camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n         camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t      camera.up = new THREE.Vector3(Math.sin(mod.thetaz),Math.cos(mod.thetaz),0)\n\t      camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n         camera.updateProjectionMatrix()\n\t      renderer.render(scene,camera)\n\t      }\n      }\n   //\n   // mouse_wheel\n   //\n   function mouse_wheel(evt) {\n      evt.preventDefault()\n      evt.stopPropagation()\n      var dy = evt.deltaY/win.innerHeight\n      mod.r += mod.height*dy\n      camera.position.x = mod.x0+Math.sin(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n      camera.position.y = mod.y0+Math.cos(mod.thetaz)*mod.r*Math.sin(mod.thetaxy)\n      camera.position.z = mod.r*Math.cos(mod.thetaxy)\n\t   camera.lookAt(new THREE.Vector3(mod.x0,mod.y0,0))\n      camera.updateProjectionMatrix()\n\t   renderer.render(scene,camera)\n      }\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1227.583507269623","left":"2165.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.9557599338778935":{"definition":"//\n// mill raster 2D\n//\n// Neil Gershenfeld\n// (c) Massachusetts Institute of Technology 2016\n//\n// This work may be reproduced, modified, distributed, performed, and\n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is\n// provided as is; no warranty is provided, and users accept all\n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'mill raster 2D'\n//\n// initialization\n//\nvar init = function() {\n   mod.dia_in.value = 0.0156\n   mod.dia_mm.value = 25.4*parseFloat(mod.dia_in.value)\n   mod.cut_in.value = 0.004\n   mod.cut_mm.value = 25.4*parseFloat(mod.cut_in.value)\n   mod.max_in.value = 0.004\n   mod.max_mm.value = 25.4*parseFloat(mod.max_in.value)\n   mod.number.value = 4\n   mod.stepover.value = 0.5\n   mod.merge.value = 1\n   mod.sort.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   imageInfo:{type:'object',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.width\n         ctx.canvas.height = mod.height\n         }},\n   path:{type:'array',\n      event:function(evt){\n         if (mod.label.nodeValue == 'calculating') {\n            draw_path(evt.detail)\n            accumulate_path(evt.detail)\n            mod.offsetCount += 1\n            if ((mod.offsetCount != parseInt(mod.number.value)) && (evt.detail.length > 0)) {\n               mod.offset += parseFloat(mod.stepover.value)\n               outputs.offset.event()\n               }\n            else {\n               mod.label.nodeValue = 'calculate'\n               mod.labelspan.style.fontWeight = 'normal'\n               merge_path()\n               clear_path()\n               draw_path(mod.path)\n               draw_connections()\n               add_depth()\n               outputs.toolpath.event()\n               }\n            }\n         }\n      },\n   settings:{type:'object',\n      event:function(evt){\n         set_values(evt.detail)\n         }\n      }\n   }\n//\n// outputs\n//\nvar outputs = {\n   diameter:{type:'number',\n      event:function(){\n         mods.output(mod,'diameter',Math.ceil(mod.dpi*mod.dia_in.value))\n         }\n      },\n   offset:{type:'number',\n      event:function(){\n         var pixels = mod.offset*parseFloat(mod.dia_in.value)*mod.dpi\n         mods.output(mod,'offset',pixels)\n         }\n      },\n   toolpath:{type:'object',\n      event:function(){\n         cmd = {}\n         cmd.path = mod.path\n         cmd.name = mod.name\n         cmd.dpi = mod.dpi\n         cmd.width = mod.width\n         cmd.height = mod.height\n         cmd.depth = mod.depth\n         mods.output(mod,'toolpath',cmd)\n         }\n      }\n   }\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // tool diameter\n   //\n   div.appendChild(document.createTextNode('tool diameter'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.dia_in.value = parseFloat(mod.dia_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.dia_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.dia_mm.value = parseFloat(mod.dia_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.dia_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // cut depth\n   //\n   div.appendChild(document.createTextNode('cut depth'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.cut_in.value = parseFloat(mod.cut_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.cut_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.cut_mm.value = parseFloat(mod.cut_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.cut_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // max depth\n   //\n   div.appendChild(document.createTextNode('max depth'))\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('mm: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.max_in.value = parseFloat(mod.max_mm.value)/25.4\n         })\n      div.appendChild(input)\n      mod.max_mm = input\n   div.appendChild(document.createTextNode(' in: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('input',function(){\n         mod.max_mm.value = parseFloat(mod.max_in.value)*25.4\n         })\n      div.appendChild(input)\n      mod.max_in = input\n   div.appendChild(document.createElement('br'))\n   //\n   // offset number\n   //\n   div.appendChild(document.createTextNode('offset number: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.number = input\n   div.appendChild(document.createTextNode(' (0 = fill)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // offset stepover\n   //\n   div.appendChild(document.createTextNode('offset stepover: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.stepover = input\n   div.appendChild(document.createTextNode(' (1 = diameter)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // direction\n   //\n   div.appendChild(document.createTextNode('direction: '))\n   div.appendChild(document.createTextNode('climb'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'direction'\n      input.id = mod.div.id+'climb'\n      input.checked = true\n      div.appendChild(input)\n      mod.climb = input\n   div.appendChild(document.createTextNode(' conventional'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'direction'\n      input.id = mod.div.id+'conventional'\n      div.appendChild(input)\n      mod.conventional = input\n   div.appendChild(document.createElement('br'))\n   //\n   // path merge\n   //\n   div.appendChild(document.createTextNode('path merge: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.merge = input\n   div.appendChild(document.createTextNode(' (1 = diameter)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // path order\n   //\n   div.appendChild(document.createTextNode('path order: '))\n   div.appendChild(document.createTextNode('forward'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'order'\n      input.id = mod.div.id+'forward'\n      input.checked = true\n      div.appendChild(input)\n      mod.forward = input\n   div.appendChild(document.createTextNode(' reverse'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'order'\n      input.id = mod.div.id+'reverse'\n      div.appendChild(input)\n      mod.reverse = input\n   div.appendChild(document.createElement('br'))\n   //\n   // sort distance\n   //\n   div.appendChild(document.createTextNode('sort distance: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.id = mod.div.id+'sort'\n      div.appendChild(input)\n      mod.sort = input\n   div.appendChild(document.createElement('br'))\n   //\n   // calculate\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n         var text = document.createTextNode('calculate')\n            mod.label = text\n            span.appendChild(text)\n         mod.labelspan = span\n         btn.appendChild(span)\n      btn.addEventListener('click',function(){\n         mod.label.nodeValue = 'calculating'\n         mod.labelspan.style.fontWeight = 'bold'\n         mod.offset = 0.5\n         mod.offsetCount = 0\n         mod.path = []\n         clear_path()\n         outputs.diameter.event()\n         outputs.offset.event()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createTextNode(' '))\n   //\n   // view\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var svg = document.getElementById(mod.div.id+'svg')\n         var clone = svg.cloneNode(true)\n         clone.setAttribute('width',mod.img.width)\n         clone.setAttribute('height',mod.img.height)\n         win.document.body.appendChild(clone)\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // on-screen SVG\n   //\n   var svgNS = \"http://www.w3.org/2000/svg\"\n   var svg = document.createElementNS(svgNS,\"svg\")\n   svg.setAttribute('id',mod.div.id+'svg')\n   svg.setAttributeNS(\"http://www.w3.org/2000/xmlns/\",\n      \"xmlns:xlink\",\"http://www.w3.org/1999/xlink\")\n   svg.setAttribute('width',mods.ui.canvas)\n   svg.setAttribute('height',mods.ui.canvas)\n   svg.style.backgroundColor = 'rgb(255,255,255)'\n   var g = document.createElementNS(svgNS,'g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   div.appendChild(svg)\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   }\n//\n// local functions\n//\n// set_values\n//\nfunction set_values(settings) {\n   for (var s in settings) {\n      switch(s) {\n         case 'tool diameter (in)':\n            mod.dia_in.value = settings[s]\n            mod.dia_mm.value = parseFloat(mod.dia_in.value)*25.4\n            break\n         case 'cut depth (in)':\n            mod.cut_in.value = settings[s]\n            mod.cut_mm.value = parseFloat(mod.cut_in.value)*25.4\n            break\n         case 'max depth (in)':\n            mod.max_in.value = settings[s]\n            mod.max_mm.value = parseFloat(mod.max_in.value)*25.4\n            break\n         case 'offset number':\n            mod.number.value = settings[s]\n            break\n         }\n      }\n   }\n//\n// clear_path\n//\nfunction clear_path() {\n   var svg = document.getElementById(mod.div.id+'svg')\n   svg.setAttribute('viewBox',\"0 0 \"+(mod.img.width-1)+\" \"+(mod.img.height-1))\n   var g = document.getElementById(mod.div.id+'g')\n   svg.removeChild(g)\n   var g = document.createElementNS('http://www.w3.org/2000/svg','g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   }\n//\n// accumulate_path\n//    todo: replace inefficient insertion sort\n//    todo: move sort out of main thread\n//\nfunction accumulate_path(path) {\n   var forward = mod.forward.checked\n   var conventional = mod.conventional.checked\n   var sort = mod.sort.checked\n   for (var segnew = 0; segnew < path.length; ++segnew) {\n      if (conventional)\n         path[segnew].reverse()\n      if (mod.path.length == 0)\n         mod.path.splice(0,0,path[segnew])\n      else if (sort) {\n         var xnew = path[segnew][0][0]\n         var ynew = path[segnew][0][1]\n         var dmin = Number.MAX_VALUE\n         var segmin = -1\n         for (var segold = 0; segold < mod.path.length; ++segold) {\n            var xold = mod.path[segold][0][0]\n            var yold = mod.path[segold][0][1]\n            var dx = xnew-xold\n            var dy = ynew-yold\n            var d = Math.sqrt(dx*dx+dy*dy)\n            if (d < dmin) {\n               dmin = d\n               segmin = segold\n               }\n            }\n         if (forward)\n            mod.path.splice(segmin+1,0,path[segnew])\n         else\n            mod.path.splice(segmin,0,path[segnew])\n         }\n      else {\n         if (forward)\n            mod.path.splice(mod.path.length,0,path[segnew])\n         else\n            mod.path.splice(0,0,path[segnew])\n         }\n      }\n   }\n//\n// merge_path\n//\nfunction merge_path() {\n   var dmerge = mod.dpi*parseFloat(mod.merge.value)*parseFloat(mod.dia_in.value)\n   var seg = 0\n   while (seg < (mod.path.length-1)) {\n      var xold = mod.path[seg][mod.path[seg].length-1][0]\n      var yold = mod.path[seg][mod.path[seg].length-1][1]\n      var xnew = mod.path[seg+1][0][0]\n      var ynew = mod.path[seg+1][0][1]\n      var dx = xnew-xold\n      var dy = ynew-yold\n      var d = Math.sqrt(dx*dx+dy*dy)\n      if (d < dmerge)\n         mod.path.splice(seg,2,mod.path[seg].concat(mod.path[seg+1]))\n      else\n         seg += 1\n      }\n   }\n//\n// add_depth\n//\nfunction add_depth() {\n   var cut = parseFloat(mod.cut_in.value)\n   var max = parseFloat(mod.max_in.value)\n   var newpath = []\n   for (var seg = 0; seg < mod.path.length; ++seg) {\n      var depth = cut\n      if ((mod.path[seg][0][0] == mod.path[seg][mod.path[seg].length-1][0])\n         && (mod.path[seg][0][0] == mod.path[seg][mod.path[seg].length-1][0])) {\n         var newseg = []\n         while (depth <= max) {\n            var idepth = -Math.round(mod.dpi*depth)\n            for (var pt = 0; pt < mod.path[seg].length; ++pt) {\n               var point = mod.path[seg][pt].concat(idepth)\n               newseg.splice(newseg.length,0,point)\n               }\n            if (depth == max)\n               break\n            depth += cut\n            if (depth > max)\n               depth = max\n            }\n         newpath.splice(newpath.length,0,newseg)\n         }\n      else {\n         var newseg = []\n         while (depth <= max) {\n            var idepth = -Math.round(mod.dpi*depth)\n            for (var pt = 0; pt < mod.path[seg].length; ++pt) {\n               var point = mod.path[seg][pt].concat(idepth)\n               newseg.splice(newseg.length,0,point)\n               }\n            newpath.splice(newpath.length,0,newseg)\n            newseg = []\n            if (depth == max)\n               break\n            depth += cut\n            if (depth > max)\n               depth = max\n            }\n         }\n      }\n   mod.path = newpath\n   mod.depth = Math.round(parseFloat(mod.max_in.value)*mod.dpi)\n   }\n//\n// draw_path\n//\nfunction draw_path(path) {\n   var g = document.getElementById(mod.div.id+'g')\n   var h = mod.img.height\n   var w = mod.img.width\n   var xend = null\n   var yend = null\n   //\n   // loop over segments\n   //\n   for (var segment = 0; segment < path.length; ++segment) {\n      if (path[segment].length > 1) {\n         //\n         // loop over points\n         //\n         for (var point = 1; point < path[segment].length; ++point) {\n            var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n            line.setAttribute('stroke','black')\n            line.setAttribute('stroke-width',1)\n            line.setAttribute('stroke-linecap','round')\n            var x1 = path[segment][point-1][0]\n            var y1 = h-path[segment][point-1][1]-1\n            var x2 = path[segment][point][0]\n            var y2 = h-path[segment][point][1]-1\n            xend = x2\n            yend = y2\n            line.setAttribute('x1',x1)\n            line.setAttribute('y1',y1)\n            line.setAttribute('x2',x2)\n            line.setAttribute('y2',y2)\n            var dx = x2-x1\n            var dy = y2-y1\n            var d = Math.sqrt(dx*dx+dy*dy)\n            if (d > 0) {\n               nx = 6*dx/d\n               ny = 6*dy/d\n               var tx = 3*dy/d\n               var ty = -3*dx/d\n               g.appendChild(line)\n               triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n               triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                  +' '+(x2-nx-tx)+','+(y2-ny-ty))\n               triangle.setAttribute('fill','black')\n               g.appendChild(triangle)\n               }\n            }\n         }\n      }\n   }\n//\n// draw_connections\n//\nfunction draw_connections() {\n   var g = document.getElementById(mod.div.id+'g')\n   var h = mod.img.height\n   var w = mod.img.width\n   //\n   // loop over segments\n   //\n   for (var segment = 1; segment < mod.path.length; ++segment) {\n      //\n      // draw connection from previous segment\n      //\n      var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n      line.setAttribute('stroke','red')\n      line.setAttribute('stroke-width',1)\n      line.setAttribute('stroke-linecap','round')\n      var x1 = mod.path[segment-1][mod.path[segment-1].length-1][0]\n      var y1 = h-mod.path[segment-1][mod.path[segment-1].length-1][1]-1\n      var x2 = mod.path[segment][0][0]\n      var y2 = h-mod.path[segment][0][1]-1\n      line.setAttribute('x1',x1)\n      line.setAttribute('y1',y1)\n      line.setAttribute('x2',x2)\n      line.setAttribute('y2',y2)\n      var dx = x2-x1\n      var dy = y2-y1\n      var d = Math.sqrt(dx*dx+dy*dy)\n      if (d > 0) {\n         nx = 6*dx/d\n         ny = 6*dy/d\n         var tx = 3*dy/d\n         var ty = -3*dx/d\n         g.appendChild(line)\n         triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n         triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n            +' '+(x2-nx-tx)+','+(y2-ny-ty))\n         triangle.setAttribute('fill','red')\n         g.appendChild(triangle)\n         }\n      }\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n\n","top":"448.58350726962306","left":"2188.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.10309904694903338":{"definition":"//\n// vectorize\n//    input is red 128:north,64:south, green 128:east,64:west, blue 128:start,64:stop\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'vectorize'\n//\n// initialization\n//\nvar init = function() {\n   mod.error.value = 1\n   mod.sort.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   image:{type:'RGBA',\n      event:function(evt){\n         mod.input = evt.detail\n         var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = mod.input.width\n         ctx.canvas.height = mod.input.height \n         ctx.putImageData(mod.input,0,0)\n         vectorize()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   path:{type:'array',\n      event:function(){\n         mods.output(mod,'path',mod.path)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen SVG\n   //\n   var svgNS = \"http://www.w3.org/2000/svg\"\n   var svg = document.createElementNS(svgNS,\"svg\")\n   svg.setAttribute('id',mod.div.id+'svg')\n   svg.setAttributeNS(\"http://www.w3.org/2000/xmlns/\",\n      \"xmlns:xlink\",\"http://www.w3.org/1999/xlink\")\n   svg.setAttribute('width',mods.ui.canvas)\n   svg.setAttribute('height',mods.ui.canvas)\n   svg.style.backgroundColor = 'rgb(255,255,255)'\n   var g = document.createElementNS(svgNS,'g')\n   g.setAttribute('id',mod.div.id+'g')\n   svg.appendChild(g)\n   div.appendChild(svg)\n   div.appendChild(document.createElement('br'))   \n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // error value\n   //\n   div.appendChild(document.createTextNode('vector fit (pixels): '))\n   //div.appendChild(document.createElement('br'))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         vectorize()\n         })\n      div.appendChild(input)\n      mod.error = input\n   div.appendChild(document.createElement('br'))\n   //\n   // sort\n   //\n   div.appendChild(document.createTextNode('sort distance: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.id = mod.div.id+'sort'\n      div.appendChild(input)\n      mod.sort = input\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var svg = document.getElementById(mod.div.id+'svg')\n         var clone = svg.cloneNode(true)\n         clone.setAttribute('width',mod.img.width)\n         clone.setAttribute('height',mod.img.height)\n         win.document.body.appendChild(clone)\n         })\n      div.appendChild(btn)\n   }\n//\n// local functions\n//\n// vectorize\n//\nfunction vectorize() {\n   //\n   // draw path\n   //\n   function draw_path(path) {\n      window.URL.revokeObjectURL(url)\n      var svg = document.getElementById(mod.div.id+'svg')\n      svg.setAttribute('viewBox',\"0 0 \"+(mod.img.width-1)+\" \"+(mod.img.height-1))\n      var g = document.getElementById(mod.div.id+'g')\n      svg.removeChild(g)\n      var g = document.createElementNS('http://www.w3.org/2000/svg','g')\n      g.setAttribute('id',mod.div.id+'g')\n      var h = mod.img.height\n      var w = mod.img.width\n      var xend = null\n      var yend = null\n      //\n      // loop over segments\n      //\n      for (var segment in path) {\n         if (path[segment].length > 1) {\n            if (xend != null) {\n               //\n               // draw connection from previous segment\n               //\n               var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n               line.setAttribute('stroke','red')\n               line.setAttribute('stroke-width',1)\n               line.setAttribute('stroke-linecap','round')\n               var x1 = xend\n               var y1 = yend\n               var x2 = path[segment][0][0]\n               var y2 = h-path[segment][0][1]-1\n               line.setAttribute('x1',x1)\n               line.setAttribute('y1',y1)\n               line.setAttribute('x2',x2)\n               line.setAttribute('y2',y2)\n               var dx = x2-x1\n               var dy = y2-y1\n               var d = Math.sqrt(dx*dx+dy*dy)\n               if (d > 0) {\n                  nx = 6*dx/d\n                  ny = 6*dy/d\n                  var tx = 3*dy/d\n                  var ty = -3*dx/d\n                  g.appendChild(line)\n                  triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n                  triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                     +' '+(x2-nx-tx)+','+(y2-ny-ty))\n                  triangle.setAttribute('fill','red')\n                  g.appendChild(triangle)\n                  }\n               }\n            //\n            // loop over points\n            //\n            for (var point = 1; point < path[segment].length; ++point) {\n               var line = document.createElementNS('http://www.w3.org/2000/svg','line')\n               line.setAttribute('stroke','black')\n               line.setAttribute('stroke-width',1)\n               line.setAttribute('stroke-linecap','round')\n               var x1 = path[segment][point-1][0]\n               var y1 = h-path[segment][point-1][1]-1\n               var x2 = path[segment][point][0]\n               var y2 = h-path[segment][point][1]-1\n               xend = x2\n               yend = y2\n               line.setAttribute('x1',x1)\n               line.setAttribute('y1',y1)\n               line.setAttribute('x2',x2)\n               line.setAttribute('y2',y2)\n               var dx = x2-x1\n               var dy = y2-y1\n               var d = Math.sqrt(dx*dx+dy*dy)\n               if (d > 0) {\n                  nx = 6*dx/d\n                  ny = 6*dy/d\n                  var tx = 3*dy/d\n                  var ty = -3*dx/d\n                  g.appendChild(line)\n                  triangle = document.createElementNS('http://www.w3.org/2000/svg','polygon')\n                  triangle.setAttribute('points',x2+','+y2+' '+(x2-nx+tx)+','+(y2-ny+ty)\n                     +' '+(x2-nx-tx)+','+(y2-ny-ty))\n                  triangle.setAttribute('fill','black')\n                  g.appendChild(triangle)\n                  }\n               }\n            }\n         }\n      svg.appendChild(g)\n      }\n   //\n   // set up worker\n   //\n   var blob = new Blob(['('+worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      webworker.terminate()\n      mod.path = evt.data.path\n      draw_path(mod.path)\n      outputs.path.event()\n      })\n   //\n   // call worker\n   //\n   webworker.postMessage({\n      height:mod.input.height,width:mod.input.width,sort:mod.sort.checked,\n      error:parseFloat(mod.error.value),\n      buffer:mod.input.data.buffer})\n   }\n//\n// vectorize worker\n//\nfunction worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var sort = evt.data.sort\n      var input = new Uint8ClampedArray(evt.data.buffer)\n      var northsouth = 0\n      var north = 128\n      var south = 64\n      var eastwest = 1\n      var east = 128\n      var west = 64\n      var startstop = 2\n      var start = 128\n      var stop = 64\n      var path = []\n      //\n      // edge follower\n      //\n      function follow_edges(row,col) {\n         if ((input[(h-1-row)*w*4+col*4+northsouth] != 0)\n            || (input[(h-1-row)*w*4+col*4+eastwest] != 0)) {\n            path[path.length] = [[col,row]]\n            while (1) {\n               if (input[(h-1-row)*w*4+col*4+northsouth] & north) {\n                  input[(h-1-row)*w*4+col*4+northsouth] =\n                     input[(h-1-row)*w*4+col*4+northsouth] & ~north\n                  row += 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+northsouth] & south) {\n                  input[(h-1-row)*w*4+col*4+northsouth] =\n                     input[(h-1-row)*w*4+col*4+northsouth] & ~south\n                  row -= 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+eastwest] & east) {\n                  input[(h-1-row)*w*4+col*4+eastwest] =\n                     input[(h-1-row)*w*4+col*4+eastwest] & ~east\n                  col += 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else if (input[(h-1-row)*w*4+col*4+eastwest] & west) {\n                  input[(h-1-row)*w*4+col*4+eastwest] =\n                     input[(h-1-row)*w*4+col*4+eastwest] & ~west\n                  col -= 1\n                  path[path.length-1][path[path.length-1].length] = [col,row]\n                  }\n               else\n                  break\n               }\n            }\n         }\n      //\n      // follow boundary starts\n      //\n      for (var row = 1; row < (h-1); ++row) {\n         col = 0\n         follow_edges(row,col)\n         col = w-1\n         follow_edges(row,col)\n         }\n      for (var col = 1; col < (w-1); ++col) {\n         row = 0\n         follow_edges(row,col)\n         row = h-1      \n         follow_edges(row,col)\n         }\n      //\n      // follow interior paths\n      //\n      for (var row = 1; row < (h-1); ++row) {\n         for (var col = 1; col < (w-1); ++col) {\n            follow_edges(row,col)\n            }\n         }\n      //\n      // vectorize path\n      //\n      var error = evt.data.error\n      var vecpath = []\n      for (var seg = 0; seg < path.length; ++seg) {\n         var x0 = path[seg][0][0]\n         var y0 = path[seg][0][1]\n         vecpath[vecpath.length] = [[x0,y0]]\n         var xsum = x0\n         var ysum = y0\n         var sum = 1\n         for (var pt = 1; pt < path[seg].length; ++pt) {\n            var xold = x\n            var yold = y\n            var x = path[seg][pt][0]\n            var y = path[seg][pt][1]\n            if (sum == 1) {\n               xsum += x\n               ysum += y\n               sum += 1\n               }\n            else {\n               var xmean = xsum/sum\n               var ymean = ysum/sum\n               var dx = xmean-x0\n               var dy = ymean-y0\n               var d = Math.sqrt(dx*dx+dy*dy)\n               var nx = dy/d\n               var ny = -dx/d\n               var l = Math.abs(nx*(x-x0)+ny*(y-y0))\n               if (l < error) {\n                  xsum += x\n                  ysum += y\n                  sum += 1\n                  }\n               else {\n                  vecpath[vecpath.length-1][vecpath[vecpath.length-1].length] = [xold,yold]\n                  x0 = xold\n                  y0 = yold\n                  xsum = xold\n                  ysum = yold\n                  sum = 1\n                  }\n               }\n            if (pt == (path[seg].length-1)) {\n               vecpath[vecpath.length-1][vecpath[vecpath.length-1].length] = [x,y]\n               }\n            }\n         }\n      //\n      // sort path\n      //\n      if ((vecpath.length > 1) && (sort == true)) {\n         var dmin = w*w+h*h\n         segmin = null\n         for (var seg = 0; seg < vecpath.length; ++seg) {\n            var x = vecpath[seg][0][0]\n            var y = vecpath[seg][0][0]\n            var d = x*x+y*y\n            if (d < dmin) {\n               dmin = d\n               segmin = seg\n               }\n            }\n         if (segmin != null) {\n            var sortpath = [vecpath[segmin]]\n            vecpath.splice(segmin,1)\n            }\n         while (vecpath.length > 0) {\n            var dmin = w*w+h*h\n            var x0 = sortpath[sortpath.length-1][sortpath[sortpath.length-1].length-1][0]\n            var y0 = sortpath[sortpath.length-1][sortpath[sortpath.length-1].length-1][1]\n            segmin = null\n            for (var seg = 0; seg < vecpath.length; ++seg) {\n               var x = vecpath[seg][0][0]\n               var y = vecpath[seg][0][1]\n               var d = (x-x0)*(x-x0)+(y-y0)*(y-y0)\n               if (d < dmin) {\n                  dmin = d\n                  segmin = seg\n                  }\n               }\n            if (segmin != null) {\n               sortpath[sortpath.length] = vecpath[segmin]\n               vecpath.splice(segmin,1)\n               }\n            }\n         }\n      else if (((vecpath.length > 1) && (sort == false)) || (vecpath.length == 1))\n         sortpath = vecpath\n      else\n         sortpath = []\n      //\n      // return path\n      //\n      self.postMessage({path:sortpath})\n      })\n   }\n//\n// return values\n//\nreturn ({\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"993.5835072696229","left":"2879.994408259124","filename":"undefined","inputs":{},"outputs":{}},"0.992472539363189":{"definition":"//\n// set object\n//\n// Neil Gershenfeld\n// (c) Massachusetts Institute of Technology 2018\n//\n// This work may be reproduced, modified, distributed, performed, and\n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is\n// provided as is; no warranty is provided, and users accept all\n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'set PCB defaults'\n//\n// initialization\n//\nvar init = function() {\n   //\n   add_output('mill traces (1/64)')\n   add_variable('tool diameter (in)','var00')\n   mod.var00.value = '0.0156'\n   add_variable('cut depth (in)','var01')\n   mod.var01.value = '0.004'\n   add_variable('max depth (in)','var02')\n   mod.var02.value = '0.004'\n   add_variable('offset number','var03')\n   mod.var03.value = '4'\n   //\n   add_output('mill outline (1/32)')\n   add_variable('tool diameter (in)','var10')\n   mod.var10.value = '0.0312'\n   add_variable('cut depth (in)','var11')\n   mod.var11.value = '0.010'\n   add_variable('max depth (in)','var12')\n   mod.var12.value = '0.072'\n   add_variable('offset number','var13')\n   mod.var13.value = '1'\n   //\n   }\n//\n// inputs\n//\nvar inputs = {}\n//\n// outputs\n//\nvar outputs = {\n   settings:{type:'',\n      event:function(vars){\n         mods.output(mod,'settings',vars)\n         }\n      }\n   }\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   }\n//\n// local functions\n//\nfunction add_output(label) {\n   if (mod.settings == undefined) {\n      mod.settings = {}\n      }\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      var span = document.createElement('span')\n      var text = document.createTextNode(label)\n         span.appendChild(text)\n      btn.appendChild(span)\n      var f = function(label) {\n         btn.addEventListener('click',function() {\n            for (var s in mod.settings)\n               mod.settings[s].span.style.fontWeight = 'normal'\n            mod.settings[label].span.style.fontWeight = 'bold'\n            var vars = {}\n            for (var v in mod.settings[label].variables)\n               vars[v] = mod.settings[label].variables[v].value\n            outputs.settings.event(vars)\n            })\n         }(label)\n      mod.settings[label] = {span:span,variables:{}}\n      mod.div.appendChild(btn)\n      mod.setting = label\n   mod.div.appendChild(document.createElement('br'))\n   }\nfunction add_variable(label,variable) {\n   var text = document.createTextNode(label)\n      mod.div.appendChild(text)\n   mod.div.appendChild(document.createTextNode(': '))\n   input = document.createElement('input')\n      input.type = 'text'\n      input.size = 10\n      mod[variable] = input\n      mod.div.appendChild(input)\n   mod.settings[mod.setting].variables[label] = input \n   mod.div.appendChild(document.createElement('br'))\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"368.58350726962306","left":"1644.9944082591242","filename":"undefined","inputs":{},"outputs":{}},"0.8622681794886853":{"definition":"//\n// save file\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'save file'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   file:{type:'object',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.contents = evt.detail.contents\n         save_file()\n         }}}\n//\n// outputs\n//\nvar outputs = {}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // info\n   //\n   var text = document.createTextNode('name:')\n      div.appendChild(text)\n      mod.nametext = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('size:')\n      div.appendChild(text)\n      mod.sizetext = text\n   div.appendChild(document.createElement('br'))\n   }\n//\n// local functions\n//\nfunction save_file() {\n   var a = document.createElement('a')\n   a.setAttribute('href','data:text/plain;charset=utf-8,'+ \n      encodeURIComponent(mod.contents))\n   a.setAttribute('download',mod.name)\n   a.style.display = 'none'\n   document.body.appendChild(a)\n   a.click()\n   document.body.removeChild(a)\n   mod.nametext.nodeValue = 'name: '+mod.name\n   mods.fit(mod.div)\n   mod.sizetext.nodeValue = 'size: '+mod.contents.length\n   mods.fit(mod.div)\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"1215.9473065265367","left":"1684.9337776993061","filename":"modules/file/save","inputs":{},"outputs":{}},"0.057765477464730264":{"definition":"//\n// read SVG\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2016\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'read SVG'\n//\n// initialization\n//\nvar init = function() {\n   }\n//\n// inputs\n//\nvar inputs = {\n   SVG:{type:'string',\n      event:function(evt) {\n         svg_load_handler({target:{result:evt.detail}})\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   SVG:{type:'string',\n      event:function(){\n         mods.output(mod,'SVG',mod.str)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // file input control\n   //\n   var file = document.createElement('input')\n      file.setAttribute('type','file')\n      file.setAttribute('id',div.id+'file_input')\n      file.style.position = 'absolute'\n      file.style.left = 0\n      file.style.top = 0\n      file.style.width = 0\n      file.style.height = 0\n      file.style.opacity = 0\n      file.addEventListener('change',function() {\n         svg_read_handler()\n         })\n      div.appendChild(file)\n      mod.file = file\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // file select button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('select SVG file'))\n      btn.addEventListener('click',function(){\n         var file = document.getElementById(div.id+'file_input')\n         file.value = null\n         file.click()\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   div.appendChild(document.createElement('br'))\n   //\n   // info div\n   //\n   var info = document.createElement('div')\n      info.setAttribute('id',div.id+'info')\n      var text = document.createTextNode('file:')\n         info.appendChild(text)\n         mod.name = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('width:')\n         info.appendChild(text)\n         mod.width = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('height:')\n         info.appendChild(text)\n         mod.height = text\n      info.appendChild(document.createElement('br'))\n      var text = document.createTextNode('units per inch:')\n         info.appendChild(text)\n         mod.units = text\n      div.appendChild(info)\n   }\n//\n// local functions\n//\n// read handler\n//\nfunction svg_read_handler(event) {\n   //\n   // read as text\n   //\n   var file_reader = new FileReader()\n   file_reader.onload = svg_load_handler\n   var input_file = mod.file.files[0]\n   var file_name = input_file.name\n   mod.name.nodeValue = \"file: \"+file_name\n   file_reader.readAsText(input_file)\n   }\n//\n// load handler\n//\nfunction svg_load_handler(event) {\n   mod.str = event.target.result\n   //\n   // parse size\n   //\n   var i = mod.str.indexOf(\"width\")\n   if (i == -1) {\n      mod.width.nodeValue = \"width: not found\"\n      mod.height.nodeValue = \"height: not found\"\n      }\n   else {\n      var i1 = mod.str.indexOf(\"\\\"\",i+1)\n      var i2 = mod.str.indexOf(\"\\\"\",i1+1)\n      var width = mod.str.substring(i1+1,i2)\n      i = mod.str.indexOf(\"height\")\n      i1 = mod.str.indexOf(\"\\\"\",i+1)\n      i2 = mod.str.indexOf(\"\\\"\",i1+1)\n      var height = mod.str.substring(i1+1,i2)\n      ih = mod.str.indexOf(\"height\")\n      if (width.indexOf(\"px\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 90\n         }\n      else if (width.indexOf(\"mm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 25.4\n         }\n      else if (width.indexOf(\"cm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 2.54\n         }\n      else if (width.indexOf(\"in\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 1\n         }\n      else {\n         var units = 90\n         }\n      mod.width.nodeValue = \"width: \"+width\n      mod.height.nodeValue = \"height: \"+height\n      mod.units.nodeValue = \"units per inch: \"+units\n      }\n   //\n   // display\n   //\n   var img = new Image()\n   var src = \"data:image/svg+xml;base64,\"+window.btoa(mod.str)\n   img.setAttribute(\"src\",src)\n   img.onload = function() {\n      if (img.width > img.height) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-img.height/img.width)\n         var w = mod.canvas.width\n         var h = mod.canvas.width*img.height/img.width\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-img.width/img.height)\n         var y0 = 0\n         var w = mod.canvas.height*img.width/img.height\n         var h = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n         ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n         ctx.drawImage(img,x0,y0,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n         ctx.canvas.width = img.width\n         ctx.canvas.height = img.height \n         ctx.drawImage(img,0,0)\n      outputs.SVG.event()\n      }\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"332.03488793999406","left":"837.5723969709061","filename":"modules/read/svg","inputs":{},"outputs":{}},"0.5022735462618486":{"definition":"//\n// convert SVG image\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2018\n// \n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'convert SVG image'\n//\n// initialization\n//\nvar init = function() {\n   mod.dpi.value = '1000'\n   }\n//\n// inputs\n//\nvar inputs = {\n   SVG:{type:'string',\n      event:function(evt){\n         mod.svg = evt.detail\n         get_size()\n         load_image()}}}\n//\n// outputs\n//\nvar outputs = {\n   image:{type:'RGBA',\n      event:function(){\n         var ctx = mod.img.getContext(\"2d\")\n         var img = ctx.getImageData(0,0,mod.img.width,mod.img.height)\n         mods.output(mod,'image',img)}},\n   imageInfo:{type:'object',\n      event:function(){\n         var obj = {}\n         obj.name = \"SVG image\"\n         obj.dpi = parseFloat(mod.dpi.value)\n         obj.width = mod.img.width\n         obj.height = mod.img.height\n         mods.output(mod,'imageInfo',obj)}}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // on-screen drawing canvas\n   //\n   var canvas = document.createElement('canvas')\n      canvas.width = mods.ui.canvas\n      canvas.height = mods.ui.canvas\n      canvas.style.backgroundColor = 'rgb(255,255,255)'\n      div.appendChild(canvas)\n      mod.canvas = canvas\n   div.appendChild(document.createElement('br'))\n   //\n   // off-screen image canvas\n   //\n   var canvas = document.createElement('canvas')\n      mod.img = canvas\n   //\n   // view button\n   //\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('view'))\n      btn.addEventListener('click',function(){\n         var win = window.open('')\n         var btn = document.createElement('button')\n            btn.appendChild(document.createTextNode('close'))\n            btn.style.padding = mods.ui.padding\n            btn.style.margin = 1\n            btn.addEventListener('click',function(){\n               win.close()\n               })\n            win.document.body.appendChild(btn)\n         win.document.body.appendChild(document.createElement('br'))\n         var canvas = document.createElement('canvas')\n            canvas.width = mod.img.width\n            canvas.height = mod.img.height\n            win.document.body.appendChild(canvas)\n         var ctx = canvas.getContext(\"2d\")\n            ctx.drawImage(mod.img,0,0)\n         })\n      div.appendChild(btn)\n   //\n   // invert button\n   //\n   div.appendChild(document.createTextNode(' '))\n   var btn = document.createElement('button')\n      btn.style.padding = mods.ui.padding\n      btn.style.margin = 1\n      btn.appendChild(document.createTextNode('invert'))\n      btn.addEventListener('click',function(){\n         invert_image()\n         })\n      div.appendChild(btn)\n   //\n   // dpi\n   //\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('dpi: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         load_image()\n         })\n      div.appendChild(input)\n      mod.dpi = input\n   div.appendChild(document.createTextNode(' (enter)'))\n   //\n   // units\n   //\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('units: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      input.addEventListener('change',function(){\n         load_image()\n         })\n      div.appendChild(input)\n      mod.unitstext = input\n   div.appendChild(document.createTextNode(' (enter)'))\n   //\n   // fill\n   //\n   div.appendChild(document.createElement('br'))\n   div.appendChild(document.createTextNode('fill background: '))\n   var input = document.createElement('input')\n      input.type = 'checkbox'\n      input.checked = true\n      input.id = mod.div.id+'fill'\n      div.appendChild(input)\n      mod.fill= input\n   //\n   // size\n   //\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('image size:')\n      div.appendChild(text)\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(pixels)')\n      div.appendChild(text)\n      mod.pixels = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(inches)')\n      div.appendChild(text)\n      mod.inches = text\n   div.appendChild(document.createElement('br'))\n   var text = document.createTextNode('(mm)')\n      div.appendChild(text)\n      mod.mm = text\n   }\n//\n// local functions\n//\n// get size\n//\nfunction get_size() {\n   var i = mod.svg.indexOf(\"width\")\n   if (i == -1) {\n      var width = 1\n      var height = 1\n      var units = 90\n      }\n   else {\n      var i1 = mod.svg.indexOf(\"\\\"\",i+1)\n      var i2 = mod.svg.indexOf(\"\\\"\",i1+1)\n      var width = mod.svg.substring(i1+1,i2)\n      i = mod.svg.indexOf(\"height\")\n      i1 = mod.svg.indexOf(\"\\\"\",i+1)\n      i2 = mod.svg.indexOf(\"\\\"\",i1+1)\n      var height = mod.svg.substring(i1+1,i2)\n      ih = mod.svg.indexOf(\"height\")\n      if (width.indexOf(\"px\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 90\n         }\n      else if (width.indexOf(\"mm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 25.4\n         }\n      else if (width.indexOf(\"cm\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 2.54\n         }\n      else if (width.indexOf(\"in\") != -1) {\n         width = width.slice(0,-2)\n         height = height.slice(0,-2)\n         var units = 1\n         }\n      else {\n         var units = 90\n         }\n      }\n   mod.width = parseFloat(width)\n   mod.height = parseFloat(height)\n   mod.units = units\n   mod.unitstext.value = units\n   }\n//\n// load image\n//\nfunction load_image() {\n   var src = \"data:image/svg+xml;base64,\"+window.btoa(mod.svg)\n   var img = new Image()\n   img.setAttribute(\"src\",src)\n   img.onload = function() {\n      var dpi = parseFloat(mod.dpi.value)\n      var units = parseFloat(mod.unitstext.value)\n      var width = parseInt(dpi*mod.width/units)\n      var height = parseInt(dpi*mod.height/units)\n      mod.pixels.nodeValue =\n         width+' x '+height+\" (pixels)\"\n      mod.inches.nodeValue =\n         (width/dpi).toFixed(3)+' x '+(height/dpi).toFixed(3)+\" (inches)\"\n      mod.mm.nodeValue =\n      (25.4*width/dpi).toFixed(3)+' x '+(25.4*height/dpi).toFixed(3)+\" (mm)\"\n      mod.img.width = width\n      mod.img.height = height\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.clearRect(0,0,width,height)\n      ctx.drawImage(img,0,0,width,height)\n      if (mod.fill.checked)\n         fill_image()\n      else\n         output_image()\n      }\n   }\n//\n// output_image\n//\nfunction output_image() {\n   if (mod.img.width > mod.img.height) {\n      var x0 = 0\n      var y0 = mod.canvas.height*.5*(1-mod.img.height/mod.img.width)\n      var w = mod.canvas.width\n      var h = mod.canvas.width*mod.img.height/mod.img.width\n      }\n   else {\n      var x0 = mod.canvas.width*.5*(1-mod.img.width/mod.img.height)\n      var y0 = 0\n      var w = mod.canvas.height*mod.img.width/mod.img.height\n      var h = mod.canvas.height\n      }\n   var ctx = mod.canvas.getContext(\"2d\")\n      ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n      ctx.drawImage(mod.img,x0,y0,w,h)\n   outputs.image.event()\n   outputs.imageInfo.event()\n   }\n//\n// fill image\n//\nfunction fill_image() {\n   var blob = new Blob(['('+fill_worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      output_image()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var h = mod.img.height\n   var w = mod.img.width\n   var ctx = mod.img.getContext(\"2d\")\n   var img = ctx.getImageData(0,0,w,h)\n   webworker.postMessage({\n      height:img.height,width:img.width,buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction fill_worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            alpha = buf[(h-1-row)*w*4+col*4+3]/255\n            buf[(h-1-row)*w*4+col*4+0] \n               = (1-alpha)*255+alpha*buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+1] \n               = (1-alpha)*255+alpha*buf[(h-1-row)*w*4+col*4+1] \n            buf[(h-1-row)*w*4+col*4+2] \n               = (1-alpha)*255+alpha*buf[(h-1-row)*w*4+col*4+2] \n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// invert image\n//\nfunction invert_image() {\n   var blob = new Blob(['('+invert_worker.toString()+'())'])\n   var url = window.URL.createObjectURL(blob)\n   var webworker = new Worker(url)\n   webworker.addEventListener('message',function(evt) {\n      window.URL.revokeObjectURL(url)\n      var h = mod.img.height\n      var w = mod.img.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      var imgdata = new ImageData(buf,w,h)\n      var ctx = mod.img.getContext(\"2d\")\n      ctx.putImageData(imgdata,0,0)\n      if (w > h) {\n         var x0 = 0\n         var y0 = mod.canvas.height*.5*(1-h/w)\n         var wd = mod.canvas.width\n         var hd = mod.canvas.width*h/w\n         }\n      else {\n         var x0 = mod.canvas.width*.5*(1-w/h)\n         var y0 = 0\n         var wd = mod.canvas.height*w/h\n         var hd = mod.canvas.height\n         }\n      var ctx = mod.canvas.getContext(\"2d\")\n      ctx.drawImage(mod.img,x0,y0,wd,hd)\n      webworker.terminate()\n      outputs.image.event()\n      })\n   var ctx = mod.canvas.getContext(\"2d\")\n   ctx.clearRect(0,0,mod.canvas.width,mod.canvas.height)\n   var h = mod.img.height\n   var w = mod.img.width\n   var ctx = mod.img.getContext(\"2d\")\n   var img = ctx.getImageData(0,0,w,h)\n   webworker.postMessage({\n      height:img.height,width:img.width,buffer:img.data.buffer},\n      [img.data.buffer])\n   }\nfunction invert_worker() {\n   self.addEventListener('message',function(evt) {\n      var h = evt.data.height\n      var w = evt.data.width\n      var buf = new Uint8ClampedArray(evt.data.buffer)\n      for (var row = 0; row < h; ++row) {\n         for (var col = 0; col < w; ++col) {\n            buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+0] \n               = 255-buf[(h-1-row)*w*4+col*4+0] \n            buf[(h-1-row)*w*4+col*4+1] \n               = 255-buf[(h-1-row)*w*4+col*4+1] \n            buf[(h-1-row)*w*4+col*4+2] \n               = 255-buf[(h-1-row)*w*4+col*4+2] \n            buf[(h-1-row)*w*4+col*4+3] = 255\n            }\n         }\n      self.postMessage({buffer:buf.buffer},[buf.buffer])\n      })\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n","top":"438.69493521948414","left":"1211.852199242571","filename":"modules/convert/svg/image","inputs":{},"outputs":{}},"0.9604471250218796":{"definition":"//\n// path to G-code\n//\n// Neil Gershenfeld \n// (c) Massachusetts Institute of Technology 2018\n// \n// Updated: Steven Chew\n// Date:    Feb 20 2019\n// Comments: Added option to output in inch or mm\n// Date:... Oct 28 2019\n// Comments: Corrected feedrate conversion\n//           - inch/s to inch/min\n//...........- mm/s to mm/min\n//\n// Updated: Neil Gershenfeld\n// Date: Oct 28 2020\n// Comments: added mm/s vs mm/min option\n//\n// This work may be reproduced, modified, distributed, performed, and \n// displayed for any purpose, but must acknowledge the mods\n// project. Copyright is retained and must be preserved. The work is \n// provided as is; no warranty is provided, and users accept all \n// liability.\n//\n// closure\n//\n(function(){\n//\n// module globals\n//\nvar mod = {}\n//\n// name\n//\nvar name = 'path to G-code'\n//\n// initialization\n//\nvar init = function() {\n   mod.cutspeed.value = '2.5'\n   mod.plungespeed.value = '2.5'\n   mod.jogheight.value = '2'\n   mod.spindlespeed.value = '11000'\n   mod.tool.value = '1'\n   mod.coolantoff.checked = true\n   mod.formatMm.checked = true\n   mod.unitMinutes.checked = true\n   }\n//\n// inputs\n//\nvar inputs = {\n   path:{type:'',\n      event:function(evt){\n         mod.name = evt.detail.name\n         mod.path = evt.detail.path\n         mod.dpi = evt.detail.dpi\n         mod.width = evt.detail.width\n         mod.height = evt.detail.height\n         make_path()\n         }}}\n//\n// outputs\n//\nvar outputs = {\n   file:{type:'',\n      event:function(str){\n         obj = {}\n         obj.name = mod.name+\".nc\"\n         obj.contents = str\n         mods.output(mod,'file',obj)\n         }}}\n//\n// interface\n//\nvar interface = function(div){\n   mod.div = div\n   //\n   // cut speed\n   //\n   div.appendChild(document.createTextNode('cut speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.cutspeed = input\n   div.appendChild(document.createTextNode(' (mm/s)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // plunge speed\n   //\n   div.appendChild(document.createTextNode('plunge speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.plungespeed = input\n   div.appendChild(document.createTextNode(' (mm/s)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // jog height\n   //\n   div.appendChild(document.createTextNode('jog height: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.jogheight = input\n   div.appendChild(document.createTextNode(' (mm)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // spindle speed\n   //\n   div.appendChild(document.createTextNode('spindle speed: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.spindlespeed = input\n   div.appendChild(document.createTextNode(' (RPM)'))\n   div.appendChild(document.createElement('br'))\n   //\n   // tool\n   //\n   div.appendChild(document.createTextNode('tool: '))\n   var input = document.createElement('input')\n      input.type = 'text'\n      input.size = 6\n      div.appendChild(input)\n      mod.tool = input\n   div.appendChild(document.createElement('br'))\n   //\n   // coolant\n   //\n   div.appendChild(document.createTextNode('coolant:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'coolant'\n      input.id = mod.div.id+'coolanton'\n      div.appendChild(input)\n      mod.coolanton = input\n   div.appendChild(document.createTextNode('on'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'coolant'\n      input.id = mod.div.id+'coolantoff'\n      div.appendChild(input)\n      mod.coolantoff = input\n   div.appendChild(document.createTextNode('off'))\n   div.appendChild(document.createElement('br'))\n   //\n   // inch or mm format\n   //\n   div.appendChild(document.createTextNode('format:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'format'\n      input.id = mod.div.id+'formatInch'\n      input.checked = true\n      div.appendChild(input)\n      mod.formatInch = input\n   div.appendChild(document.createTextNode('inch'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'format'\n      input.id = mod.div.id+'formatMm'\n      div.appendChild(input)\n      mod.formatMm = input\n   div.appendChild(document.createTextNode('mm'))\n   div.appendChild(document.createElement('br'))\n   //\n   // second or minute rate units \n   //\n   div.appendChild(document.createTextNode('rate units:'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'units'\n      input.id = mod.div.id+'unitSeconds'\n      input.checked = true\n      div.appendChild(input)\n      mod.unitSeconds = input\n   div.appendChild(document.createTextNode('second'))\n   var input = document.createElement('input')\n      input.type = 'radio'\n      input.name = mod.div.id+'units'\n      input.id = mod.div.id+'unitMinutes'\n      div.appendChild(input)\n      mod.unitMinutes = input\n   div.appendChild(document.createTextNode('minute'))\n   }\n//\n// local functions\n//\nfunction make_path() {\n   var dx = 25.4*mod.width/mod.dpi\n   var cut_speed = parseFloat(mod.cutspeed.value)\n   var plunge_speed = parseFloat(mod.plungespeed.value)\n   var jog_height = parseFloat(mod.jogheight.value)\n   var nx = mod.width\n   var scale = dx/(nx-1)\n   var in_mm_scale = 1\n   if (mod.formatInch.checked) {\n      dx /= 25.4\n      scale /= 25.4\n      cut_speed /= 25.4\n      plunge_speed /= 25.4\n      jog_height /= 25.4\n      }\n   if (mod.unitMinutes.checked) {\n      cut_speed *= 60\n      plunge_speed *= 60\n      }\n   var spindle_speed = parseFloat(mod.spindlespeed.value)\n   var tool = parseInt(mod.tool.value)\n   str = \"%\\n\" // tape start\n   str += \"G17\\n\" // xy plane\n   if (mod.formatInch.checked)\n      str += \"G20\\n\" // inches\n   if (mod.formatMm.checked)\n      str += \"G21\\n\" // mm\n   str += \"G40\\n\" // cancel tool radius compensation\n   str += \"G49\\n\" // cancel tool length compensation\n   str += \"G54\\n\" // coordinate system 1\n   str += \"G80\\n\" // cancel canned cycles\n   str += \"G90\\n\" // absolute coordinates\n   str += \"G94\\n\" // feed/minute units\n   str += \"T\"+tool+\"M06\\n\" // tool selection, tool change\n   str += \"F\"+cut_speed.toFixed(4)+\"\\n\" // feed rate\n   str += \"S\"+spindle_speed+\"\\n\" // spindle speed\n   if (mod.coolanton.checked)\n      str += \"M08\\n\" // coolant on\n   str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\" // move up before starting spindle\n   str += \"M03\\n\" // spindle on clockwise\n　//str += \"G04 P1000\\n\" // give spindle 1 second to spin up................comment out\n   //str += \"G04 P1\\n\" // give spindle 1 Millisecond to spin up..............comment out\n   //\n   // follow segments\n   //\n   for (var seg = 0; seg < mod.path.length; ++seg) {\n      //\n      // move up to starting point\n      //\n      x = scale*mod.path[seg][0][0]\n      y = scale*mod.path[seg][0][1]\n      str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\"\n      str += \"G00X\"+x.toFixed(4)+\"Y\"+y.toFixed(4)+\"Z\"+jog_height.toFixed(4)+\"\\n\"\n      //\n      // move down\n      //\n      z = scale*mod.path[seg][0][2]\n      str += \"G01Z\"+z.toFixed(4)+\" F\"+plunge_speed.toFixed(4)+\"\\n\"\n      str += \"F\"+cut_speed.toFixed(4)+\"\\n\" //restore xy feed rate\n      for (var pt = 1; pt < mod.path[seg].length; ++pt) {\n         //\n         // move to next point\n         //\n         x = scale*mod.path[seg][pt][0]\n         y = scale*mod.path[seg][pt][1]\n         z = scale*mod.path[seg][pt][2]\n         str += \"G01X\"+x.toFixed(4)+\"Y\"+y.toFixed(4)+\"Z\"+z.toFixed(4)+\"\\n\"\n         }\n      }\n   //\n   // finish\n   //\n   str += \"G00Z\"+jog_height.toFixed(4)+\"\\n\" // move up before stopping spindle\n   str += \"M05\\n\" // spindle stop\n   if (mod.coolanton.checked)\n      str += \"M09\\n\" // coolant off\n   str += \"M30\\n\" // program end and reset\n   str += \"%\\n\" // tape end\n   //\n   // output file\n   //\n   outputs.file.event(str)\n   }\n//\n// return values\n//\nreturn ({\n   mod:mod,\n   name:name,\n   init:init,\n   inputs:inputs,\n   outputs:outputs,\n   interface:interface\n   })\n}())\n\n","top":"764.1683166499946","left":"1656.839479173399","filename":"modules/path/formats/g-code","inputs":{},"outputs":{}}},"links":["{\"source\":\"{\\\"id\\\":\\\"0.07944144280928633\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8903773266711255\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.47383876715576023\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"distances\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"distances\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.07944144280928633\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.6488303557466412\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.47383876715576023\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"offset\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.3135579179893032\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"offset\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"toolpath\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.2892270043957246\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"toolpath\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.8903773266711255\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.10309904694903338\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.10309904694903338\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"path\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"path\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.992472539363189\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"settings\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"settings\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.5022735462618486\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"image\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.6488303557466412\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"image\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.5022735462618486\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"imageInfo\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9557599338778935\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"imageInfo\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.057765477464730264\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"SVG\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.5022735462618486\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"SVG\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.2892270043957246\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"toolpath\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.9604471250218796\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"path\\\"}\"}","{\"source\":\"{\\\"id\\\":\\\"0.9604471250218796\\\",\\\"type\\\":\\\"outputs\\\",\\\"name\\\":\\\"file\\\"}\",\"dest\":\"{\\\"id\\\":\\\"0.8622681794886853\\\",\\\"type\\\":\\\"inputs\\\",\\\"name\\\":\\\"file\\\"}\"}"]}
\ No newline at end of file
diff --git a/docs/Instruction/images/proverXL/mods_save_local_program.png b/docs/Instruction/images/proverXL/mods_save_local_program.png
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diff --git a/docs/Instruction/tips/genmitsu_prover_xl_setup.md b/docs/Instruction/tips/genmitsu_prover_xl_setup.md
index 9bd98b0c72a656146ea916617a3a1ce7de38c551..290b1f3a3bdc7629e07c5d3debafb2d249cecb6d 100644
--- a/docs/Instruction/tips/genmitsu_prover_xl_setup.md
+++ b/docs/Instruction/tips/genmitsu_prover_xl_setup.md
@@ -31,6 +31,10 @@ Download: [SVG](../images/proverXL/30x30_40x40mm.svg)
 
 ### CAM: [Mods](https://mods.cba.mit.edu/)
 
+!!! Attention
+    See [Adjust MODS' g-code for this machine](#Adjust MODS' g-code for this machine) first (below)
+
+
 ![](../images/proverXL/mods_pcb_svg.png)  
 
 ![](../images/proverXL/mods_new_open.png)
@@ -53,7 +57,8 @@ Download: [SVG image.nc](../images/proverXL/SVG image.nc)
 - [Installation](https://resources.sienci.com/view/gs-installation/)
 
 ![](../images/proverXL/gsender_opened.png)
-#### Set up
+
+#### Set up Software
 - Install [CH340 Driver](https://learn.sparkfun.com/tutorials/how-to-install-ch340-drivers/all#mac-osx)
 - Download setting file [gSender-settings-Genmitsu PROVerXL-4030.json](../images/proverXL/gSender-settings-Genmitsu PROVerXL-4030.json)
 - Gear icon(right top) -> Clock to open Setting
@@ -67,6 +72,7 @@ Download: [SVG image.nc](../images/proverXL/SVG image.nc)
 - Connect to Machine -> Unrecognized devices -> /dev/tty.wchusbserial1440
 ![](../images/proverXL/gsender_connect_to_machine.png)
 
+### Set up Machine
 - Click to Run Homing
 
 !!! Danger
@@ -75,3 +81,216 @@ Download: [SVG image.nc](../images/proverXL/SVG image.nc)
 
 ![](../images/proverXL/gsender_homing.png)  
 ![](../images/proverXL/machine_homing.jpg){width=500}
+![](../images/proverXL/gsender_homed.png)
+
+- Jog Control
+    - Home (Machine origin)
+        - X: 0 (Right)
+        - Y: 0 (Back)
+        - X: 0 (Up)
+    - Jog
+        - X: "** X- **" to move Left
+        - Y: "** Y- **" to move Forword
+        - Z: "** Z- **" to move Down
+    - Keyboard short cut
+        - X: shift + right/left
+        - Y: shift + up/down
+        - Z: shift + pageup/pagedown
+
+![](../images/proverXL/gsender_jog.png)
+
+- Tool setting
+    - Use 2 Wrenches
+        - No.13 : hold top
+        - No.17 : loose/tight Collet holder
+
+![](../images/proverXL/tool_change.jpg)
+
+
+- Move to Material
+    - Use Jog control to  your material(left-down)    
+
+![](../images/proverXL/tool_move_to_left_forword.jpg)  
+
+- Z-touch
+    - Use paper to touch the tool on the paper surface
+    - move one more -0.1mm down to reach the material surface
+
+![](../images/proverXL/tool_z_touch.jpg)  
+
+- Work ZERO
+    - Click **Zero All** to Work origin (X0,Y0,Z0)
+![](../images/proverXL/work_origin_before.png)     
+![](../images/proverXL/work_origin.png)  
+
+### Load File
+
+- Click **Load File** and open [SVG image.nc](../images/proverXL/SVG image.nc)
+
+![](../images/proverXL/load_file.png)
+
+### Start milling
+
+- Click **Start Job** to run
+![](../images/proverXL/job_start.png)
+
+### Milled
+
+![](../images/proverXL/30x30mm_cutout.jpg){width=400}  
+![](../images/proverXL/milled_bords_svg_png.jpg){width=400}  
+
+
+
+
+## Adjust MODS' g-code for this machine
+
+[mods](https://mods.cba.mit.edu/)
+
+![](../images/proverXL/mods_pcb_svg.png)
+
+ Compare G-code form png and from SVG  
+
+!!! note
+    PNG's ```G04 P1``` or SVG's ```G04 P1000``` need to be **commented out** for this machine, otherwise machine will stop on this line.
+
+
+30x30_40x40mm_96dpi.png.nc  |SVG image.nc                |Meanig  
+-                           |---                         |--
+%                           |%                           |% Signals start
+G17                         |G17                         |G17 Select X-Y plane
+G21                         |G21                         |G21 Metric units
+G40                         |G40                         |G40 Cancel cutter compensation
+G49                         |G49                         |G49 Cancel cutter
+G54                         |G54                         |G54 Set Datum
+G80                         |G80                         |G80 Cancel cycles
+G90                         |G90                         |G90 Absolute programming
+G94                         |G94                         |G94 Per minute feed
+T1M06                       |T1M06                       |T1 Tool Number, M06 Tool Change
+F150.0000                   |F150.0000                   |F Defines feed rate
+S11000                      |S11000                      |S Defines speed
+G00Z2.0000                  |G00Z2.0000                  |G00 Positioning at rapid travel Z2.0000
+M03                         |M03                         |M03 Spindle on  clockwise
+**G04 P1**                  |**G04 P1000**               |G04 Dwell P[ms]
+G00Z2.0000                  |G00Z2.0000                  |
+G00X5.3263Y4.7937Z2.0000    |G00X5.0324Y4.8037Z2.0000    |
+G01Z-0.7989 F150.0000       |G01Z-0.7117 F150.0000       |
+F150.0000                   |F150.0000                   |
+G01X5.3263Y5.0600Z-0.7989   |G01X5.0324Y4.8291Z-0.7117   |
+G01X4.7937Y5.5926Z-0.7989   |G01X4.9816Y4.8291Z-0.7117   |
+G01X4.7937Y34.6208Z-0.7989  |G01X4.8545Y4.9561Z-0.7117   |
+G01X5.8589Y35.1534Z-0.7989  |G01X4.8037Y5.1086Z-0.7117   |
+G01X34.6208Y35.1534Z-0.7989 |G01X4.8037Y34.9472Z-0.7117  |
+G01X35.1534Y34.0882Z-0.7989 |G01X4.9561Y35.1251Z-0.7117  |
+G01X35.1534Y5.3263Z-0.7989  |G01X5.1086Y35.1759Z-0.7117  |
+G01X34.0882Y4.7937Z-0.7989  |G01X34.9472Y35.1759Z-0.7117 |
+G01X5.3263Y4.7937Z-0.7989   |G01X35.1251Y35.0235Z-0.7117 |
+G00Z2.0000                  |G01X35.1759Y34.8710Z-0.7117 |
+G1X0Y0Z0                    |G01X35.1759Y5.0324Z-0.7117  |
+M05                         |G01X35.0235Y4.8545Z-0.7117  |
+M30                         |G01X34.8710Y4.8037Z-0.7117  |
+%                           |G01X5.0324Y4.8037Z-0.7117   |
+                            |G00Z2.0000                  |
+                            |M05                         |M05 Spindle Stop
+                            |M30                         |M30 Program end, return to start
+                            |%                           |
+
+Ref. [G-gode](https://gcodetutor.com/cnc-machine-training/cnc-g-codes.html),
+[M-code](https://gcodetutor.com/gcode-tutorial/cnc-m-codes.html),
+[T1M06](https://cnc-programming-tips.blogspot.com/2014/11/what-is-m06-m-code-tool-change-command.html),
+[G04](https://en.wikipedia.org/wiki/G-code),
+[G54](https://nc-program.s-projects.net/g-code/g54-59.html),
+[%](https://en.wikipedia.org/wiki/G-code)
+
+
+
+
+### Edit **path to G-code** module
+
+![](../images/proverXL/node-path_to_G-code.png){width=300}
+
+Comment out ```G04 P1000```
+
+```
+//
+// local functions
+//
+function make_path() {
+   var dx = 25.4*mod.width/mod.dpi
+   var cut_speed = parseFloat(mod.cutspeed.value)
+   var plunge_speed = parseFloat(mod.plungespeed.value)
+   var jog_height = parseFloat(mod.jogheight.value)
+   var nx = mod.width
+   var scale = dx/(nx-1)
+   var in_mm_scale = 1
+   if (mod.formatInch.checked) {
+      dx /= 25.4
+      scale /= 25.4
+      cut_speed /= 25.4
+      plunge_speed /= 25.4
+      jog_height /= 25.4
+      }
+   if (mod.unitMinutes.checked) {
+      cut_speed *= 60
+      plunge_speed *= 60
+      }
+   var spindle_speed = parseFloat(mod.spindlespeed.value)
+   var tool = parseInt(mod.tool.value)
+   str = "%\n" // tape start
+   str += "G17\n" // xy plane
+   if (mod.formatInch.checked)
+      str += "G20\n" // inches
+   if (mod.formatMm.checked)
+      str += "G21\n" // mm
+   str += "G40\n" // cancel tool radius compensation
+   str += "G49\n" // cancel tool length compensation
+   str += "G54\n" // coordinate system 1
+   str += "G80\n" // cancel canned cycles
+   str += "G90\n" // absolute coordinates
+   str += "G94\n" // feed/minute units
+   str += "T"+tool+"M06\n" // tool selection, tool change
+   str += "F"+cut_speed.toFixed(4)+"\n" // feed rate
+   str += "S"+spindle_speed+"\n" // spindle speed
+   if (mod.coolanton.checked)
+      str += "M08\n" // coolant on
+   str += "G00Z"+jog_height.toFixed(4)+"\n" // move up before starting spindle
+   str += "M03\n" // spindle on clockwise
+   //str += "G04 P1000\n" // give spindle 1 second to spin up................comment out
+   //str += "G04 P1\n" // give spindle 1 Millisecond to spin up..............comment out
+```
+
+### save local program
+
+![](../images/proverXL/mods_save_local_program.png)
+
+## Download local program
+
+mill_2D_PCB|PNG  |SVG
+--         |--   |--
+html|[png.html](../images/proverXL/mods/mill_2D_PCB_png.html)|[svg.html](../images/proverXL/mods/mill_2D_PCB_svg.html)
+txt|[png.txt](../images/proverXL/mods/mill_2D_PCB_png.txt)|[svg.txt](../images/proverXL/mods/mill_2D_PCB_svg.txt)
+
+
+
+### open local program
+- html
+    - Double Click mill_2D_PCB_svg.html (work in local PC)
+- text
+    - Open [mods](https://mods.cba.mit.edu/) (MIT server)
+    - left click -> program -> open local program -> mill_2D_PCB_svg.txt -> open
+
+
+
+## line Test
+
+### V-bit
+
+  - Cutting Edge Diameter 0.2mm
+  - 30 Degrees
+
+Depth of Cut|Width of Cut  
+--          |--
+0.1         |0.25359  
+0.2         |0.30718
+0.3         |0.36077  
+
+Ref. [calculator width-of-cut of a “V” shaped cutting tool](https://woodworkerb.com/home/pcb-isolation-routing/tool-width-calculator/)