Coffeescript game{closure} trail animation example

Application.coffee

`import ui.View as View`
`import animate`

toColor = (x) -> (x % 255).toString(16)

class Trail extends GC.Application

        createTrail: (pt) ->
                opts = merge(pt, {superview: GC.app.view})
                new TrailBox(pt, opts)

        initUI: ->
                @style.backgroundColor = '#FFFFFF'
                @view.on('InputMove',(evt,pt) -> @.createTrail(pt))

        launchUI: -> #disable splash screen


class TrailBox extends View

        init: (opts) ->
                colorZ = toColor(opts.x + opts.y)
                colorX = toColor(opts.x)
                colorY = toColor(opts.y)

                options = merge(opts, {
                      backgroundColor: '#'+ colorZ + colorX + colorY
                      opacity: 0.8
                      anchorX: 1.5
                      anchorY: 1.5
                      width: 3
                      height: 3
                      r: 0 })

                super options

                fadeAnimation = {
                      opacity: 0
                      x: opts.x - 15
                      y: opts.y - 15
                      anchorX: 15
                      anchorY: 15
                      width: 30
                      height: 30
                      r: Math.PI * 4}

                animate(@).now(fadeAnimation, 1500).then(@.remove())

        remove: ->
                => @.removeFromSuperview()

`exports = Trail`