flex 3d旋转

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
					   xmlns:s="library://ns.adobe.com/flex/spark" 
					   xmlns:mx="library://ns.adobe.com/flex/mx" width="800" height="500" 
					   creationComplete="windowedapplication1_creationCompleteHandler(event)">
	<fx:Script>
		<![CDATA[
			import com.greensock.TweenLite;
			import com.greensock.easing.*;
			
			import mx.events.FlexEvent;
			// variable declarations ------------------------------------
			private var timer:Number = 0;
			
			private var radius:Number = 300;
			private var _cosAngle:Number;
			private var _sinAngle:Number;
			// getter/setters -------------------------------------------
			// helper methods -------------------------------------------
			// event handlers -------------------------------------------			
			protected function windowedapplication1_creationCompleteHandler(event:FlexEvent):void
			{
				addEventListener(Event.ENTER_FRAME,onFrame);
			}
			
			
			protected function onFrame(event:Event):void
			{
				_cosAngle = Math.cos(timer/100);
				_sinAngle = Math.sin(timer/100);
				if(timer % 1 == 0){
					
					var xPos:Number = radius * _cosAngle - radius * _sinAngle;
					var zPos:Number = radius * _cosAngle + radius * _sinAngle;
					img.x = xPos + 500;
					img.z = zPos + 400;
					img.rotationY = -timer*100/180+30;
					//TweenLite.to(img,1,{x:(xPos+400),z:(zPos+400)});
				}
				timer++;
				//trace(posX);
			}
			
		]]>
	</fx:Script>
	
	<fx:Declarations>
		<!-- Place non-visual elements (e.g., services, value objects) here -->
	</fx:Declarations>
	<s:Image id="img" y="380" source="assets/cc.jpg"/>
</s:WindowedApplication>