     @rebuildAt @appendRewrite @center, appendArray
         
   draw: (cells, viewMatrix, context) ->
-    context.fillStyle = "black"
-    context.lineWidth = 1.0/400.0
-    context.strokeStyle = "rgb(128,128,128)"
-
     #first borders
     context.beginPath()
     for cell, i in @cells

  context.save()
  context.scale s, s
  context.translate 1, 1
  rval = observer.draw cells, context
  context.restore()
  return rval

        null
    context.fill()
    return true
  shutdown: ->
    @worker.terminate()
    

#determine cordinates of the cell, containing given point
