 class Plant extends Organism
   constructor: ( location, options = {} ) ->
     super location, options
-    @bodyColor = options.bodyColor || 'green'
-    @radius = options.radius || 4
-    @type = Plant
+    @bodyColor ?= 'green'
+    @radius    ?= 4
+    @type       = Plant
   gain: -> .5
   defaultGenes: ->
     @mergeGenes super(), {

        @remThing t
      else if t.isSick()
        t.expose other for other in t.touching() when other.type? and other.type == t.type
    # @things = grep @things, (t) -> !t.dead
    @dead = true
    for column in @cells
      break unless @dead

    [ x, y ] = @edgePoint point, rad + @radius
    @drawArc x, y, rad, @bodyColor, start, end
  calcTailSize: ->
    size = @radius * @maxAcceleration() / @genes.maxAcceleration[2](@)
    max 2, size
  calcEarSize: ->
    ratio = @auditoryRange() / @genes.auditoryRange[2]
