 
 ###*
 Updates the position of the text based on the effect velocity. Updates the 
-alpha based on the elapsed time since the effect creation. If <code>rotationalVelocity</code>
-is provided then the text rotation is updated as well.
+alpha based on the elapsed time since the effect creation.
 
 @name update
 @methodOf TextEffect#

###*
The Text Effect class provides a method to display moving text onscreen, fading out the text over the effect duration.

By default, images are loaded asynchronously. A proxy object is 
returned immediately. Even though it has a draw method it will not
draw anything to the screen until the image has been loaded.

@name TextEffect
@constructor

    textShadow: Color('black')
    alpha: 1
    rotation: 0
    velocity: Point(0, 0)
    
  self = GameObject(I)

  self.bind "update", ->    
    I.alpha = 1 - (I.age / I.duration)
        
  self.unbind "draw"
  self.bind "draw", (canvas) ->      
    unless I.color.channels
      I.color = Color(I.color)
    
