package
{
  public class SimpleBallBouncer extends Sprite
	{
		private var ball:Ball;
		private var vx:Number;
		private var vy:Number;
	
		public function SimpleBallBouncer( ball:Ball )
		{
			this.ball = ball;
			ball.x 		= 100;
			ball.y 		= 100;
			vx		= Math.random() / 10;
			vy 		= Math.random() / 10;
		
			addEventListener(Event.ENTER_FRAME, onEnterFrame );
		}
	
		public function onEnterFrame(event:Event):void
		{
	    if ( ball.x + vx < 0 )
	    	vx = 0 - vx;
    
	    else if ( ball.x + ball.radius + vx >= stage.stageWidth )
	    	vx = 0 - vx;

	    if ( ball.y + mDeltaY < 0 )
	    	vy = 0 - vy;
    
	    else if ( ball.y + ball.radius + vy >= stage.stageHeight )
	    	vy = 0 - vy;

	    ball.x = ball.x + vx;
	    ball.y = ball.y + vx;

		}
	}
	
}