Flex ActionScript实例之纯ActionScript动画

package
{
    import flash.display.*;
    import flash.events.TimerEvent;
    import flash.utils.Timer;

    public class Main extends Sprite
    {
        protected var myShape:DisplayObject;

        public function Main()
        {
            var fps:int = 60;

            var mspf:int = Math.round(1 / fps * 1000);

            var t:Timer = new Timer(mspf);
            t.addEventListener(TimerEvent.TIMER, onTimer);
            t.start();
        var s:Sprite = new Sprite();
        addChild(s);
            myShape = getChildAt(0);
        }

        protected function onTimer(event:TimerEvent):void
        {
            myShape.x += 0.5;

            event.updateAfterEvent();
        }
    }
}