diffusion.html

<html>
  <head>
    <title>Diffusion Model</title>
    <script src="../lib/agentscript.js"></script>
    <script src="../tools/coffee-script.js"></script>
    <script type="text/coffeescript">

    u = ABM.Util # ABM.Util alias
    class MyModel extends ABM.Model
      setup: ->

        # No optimizations: 30fps
        @patches.usePixels() # 57+fps
        # @patches.cacheTurtlesHere() # 28-9fps, not needed * overhead
        console.log "cacheTurtlesHere: ", @patches.turtles?

        # two: 57+fps, fast patches get us to max


        # globals
        @population = 100
        @diffusionRate = .70
        @coolingRate = .10
        @speed = .5

        @anim.setRate 60 #, true

        # defaults
        @turtles.setDefault "size", 1.5
        @turtles.setDefault "useSprites", true

        @turtles.create @population
        # @turtles.create @population, (a) => # fat arrow for @patches etc
        #   a.size = 1.5
        for p in @patches
          p.heat = 0
      step: ->
        for p in @patches
          p.heat *= (1-@coolingRate)
        for a in @turtles
          a.rotate u.randomCentered(u.degToRad(40))
          a.forward @speed
          a.p.heat = 1
        @patches.diffuse "heat", @diffusionRate, [255,0,0]
        # @stop() # debug: one step

    # div, patchSize, minX, maxX, minY, maxY, isTorus, hasNeighbors
    #   Defaults: 13, -16, 16, -16, 16, false, true
    model = new MyModel {
      div: "layers",
      size: 10,
      minX: -25,
      maxX: 25,
      minY: -20,
      maxY: 20,
      isTorus: true
    }
    model.debug() # Debug: Put Model vars in global name space
    model.start() # Run model immediately after startup initialization

    </script>
  </head>
  <body>
    <div id="layers"></div>
  </body>
</html>