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    {
     "data": {
      "application/javascript": [
       "require.undef(\"nbextensions/vpython_libraries/glow.min\");"
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       "require.undef(\"nbextensions/vpython_libraries/glowcomm\");"
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     },
     "metadata": {},
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    {
     "data": {
      "application/javascript": [
       "require.undef(\"nbextensions/vpython_libraries/jquery-ui.custom.min\");"
      ],
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       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
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    {
     "data": {
      "application/javascript": [
       "require([\"nbextensions/vpython_libraries/glow.min\"], function(){console.log(\"GLOW LOADED\");})"
      ],
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       "<IPython.core.display.Javascript object>"
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    {
     "data": {
      "application/javascript": [
       "require([\"nbextensions/vpython_libraries/glowcomm\"], function(){console.log(\"GLOWCOMM LOADED\");})"
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     "data": {
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       "require([\"nbextensions/vpython_libraries/jquery-ui.custom.min\"], function(){console.log(\"JQUERY LOADED\");})"
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      "text/html": [
       "<div id=\"glowscript\" class=\"glowscript\"></div>"
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     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "application/javascript": [
       "window.__context = { glowscript_container: $(\"#glowscript\").removeAttr(\"id\")}"
      ],
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   ],
   "source": [
    "from vpython import *\n",
    "scene.width = scene.height = 500\n",
    "scene.background = color.gray(0.8)\n",
    "scene.range = 2.2\n",
    "scene.caption = \"Click to pick an object and make it red.\"\n",
    "scene.append_to_caption(\"\\nNote picking of individual curve segments.\")\n",
    "box(pos=vector(-1,0,0), color=color.cyan, opacity=1)\n",
    "box(pos=vector(1,-1,0), color=color.green)\n",
    "arrow(pos=vector(-1,-1.3,0), color=color.orange)\n",
    "cone(pos=vector(2,0,0), axis=vector(0,1,-.3), color=color.blue, size=vector(2,1,1))\n",
    "sphere(pos=vector(-1.5,1.5,0), color=color.white, size=.4*vector(3,2,1))\n",
    "square = curve(color=color.yellow, radius=.05)\n",
    "square.append(vector(0,0,0))\n",
    "square.append(pos=vector(0,1,0), color=color.cyan, radius=.1)\n",
    "square.append(vector(1,1,0))\n",
    "square.append(pos=vector(1,0,0), radius=.1)\n",
    "square.append(vector(0.3,-.3,0))\n",
    "v0 = vertex(pos=vector(-.5,1.2,0), color=color.green)\n",
    "v1 = vertex(pos=vector(1,1.2,0), color=color.red)\n",
    "v2 = vertex(pos=vector(1,2,0), color=color.blue)\n",
    "v3 = vertex(pos=vector(-.5,2,0), color=color.yellow)\n",
    "quad(vs=[v0, v1, v2, v3])\n",
    "ring(pos=vector(-0.6,-1.3,0), size=vector(0.2,1,1), color=color.green)\n",
    "extrusion(path=[vector(-1.8,-1.3,0), vector(-1.4,-1.3,0)],\n",
    "            shape=shapes.circle(radius=.5, thickness=0.4), color=color.yellow)\n",
    "\n",
    "lasthit = None\n",
    "lastpick = None\n",
    "lastcolor = None\n",
    "\n",
    "def getevent():\n",
    "    global lasthit, lastpick, lastcolor\n",
    "    if lasthit != None:\n",
    "        if lastpick != None: lasthit.modify(lastpick, color=lastcolor)\n",
    "        else: lasthit.color = vector(lastcolor)\n",
    "        lasthit = lastpick = None\n",
    "    \n",
    "    hit = scene.mouse.pick\n",
    "    if hit != None:\n",
    "        lasthit = hit\n",
    "        lastpick = None\n",
    "        if isinstance(hit, curve):  # pick individual point of curve\n",
    "            lastpick = hit.segment\n",
    "            lastcolor = hit.point(lastpick)['color']\n",
    "            hit.modify(lastpick, color=color.red)\n",
    "        elif isinstance(hit, quad):\n",
    "            lasthit = hit.v0\n",
    "            lastcolor = vector(lasthit.color) # make a copy\n",
    "            lasthit.color = color.red\n",
    "        else:\n",
    "            lastcolor = vector(hit.color) # make a copy\n",
    "            hit.color = color.red\n",
    "\n",
    "scene.bind(\"mousedown\", getevent)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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