models/fire.html

<html>
  <head>
    <title>Fire 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: ->
        @agentBreeds "embers fires"
        @turtles.setDefault "shape", "square"
        @turtles.setDefault "color", [255,0,0]
        @turtles.setDefault "heading", 0 # override promotion to random angle

        @refreshPatches = false # <1fps->50-55fps, no surprise, app optimized for this
        # No optimizations: 50-55fps
        # @patches.usePixels() # 50-55fps .. not used, refresh off
        # @patches.cacheTurtlesHere() # 50-55fps, not needed * overhead
        # None of the optimizations particularly useful, other than refresh
        # If refresh on, fastPatches is in the 50+fps range.

        @density = 60 # percent
        @burnedTrees = 0
        @initialTrees = 0

        # defaults
        # @anim.setRate 10, true
        @anim.setRate 60, false


        for p in @patches when u.randomInt(100) < @density
          # u.setColor p.color, 0, 255, 0
          p.color = [0, 255, 0] # override default, set per patch color
        @ignite p for p in @patches when p.x is @patches.minX
        @initialTrees = (p for p in @patches when u.colorsEqual p.color, [0, 255, 0]).length
        console.log "patches: #{@patches.length}, turtles #{@turtles.length}"
        console.log "initialTrees: #{@initialTrees}, burnedTrees #{@burnedTrees}"
        @burnedTrees = 0 # reset from initial ignites
        # console.log "embers: ", @embers; window.embers = @embers
        # console.log "fires: ", @fires; window.fires = @fires
        # console.log "turtles:", @turtles
      ignite: (p) ->
        p.sprout 1, @fires, (a) ->
          #a.breed = "fires"
          #a.color = [255, 0, 0]
        p.color = [0, 0, 0] # in original model but apparently not needed, refresh off?
        @burnedTrees++
      fadeEmbers: ->
        for a in @embers by -1 # -1: allow die() in loop
          a.scaleColor a.color, .8
          if 100 > Math.max a.color.subarray(0,3)... # or (Math.max a.color...) < 100 , needs parens
            a.p.color = a.color
            a.p.draw @contexts.patches
            a.die()
      step: ->
        # console.log @anim.toString() if @anim.ticks % 100 is 0
        unless @turtles.any()
          console.log "..stopping, fire done at tick: #{@anim.ticks}"
          @stop()
        for a in @fires by -1 # -1: allow setBreed() in loop
          @ignite p for p in a.p.n4 when u.colorsEqual p.color, [0, 255, 0]
          @embers.setBreed a
        @fadeEmbers()

    # div, patchSize, minX, maxX, minY, maxY, isTorus, hasNeighbors
    #   Defaults: 13, -16, 16, -16, 16, false, true
    model = new MyModel {
      div: "layers",
      size: 2,
      minX: -125,
      maxX: 125,
      minY: -125,
      maxY: 125
    }
    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>