fp10 Api中3D

package
{
	import flash.display.DisplayObject;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.geom.Vector3D;
	
	[SWF(backgroundColor=0xffffff,width='1024',height='600')]
	public class Carousel extends Sprite {
		
		private var _holder:Sprite;
		private var _items:Array;
		private var _radius:Number = 200;
		private var _numItems:int = 30;
		
		public function Carousel() {
			//root.transform.perspectiveProjection.focalLength = 0;
			_holder = new Sprite();
			_holder.x = stage.stageWidth/2;
			_holder.y = stage.stageHeight/2;
			_holder.z = 0;
			this.addChild(_holder);
			
			_items = new Array();
			for( var i:int = 0; i<_numItems; i++ ) {
				var angle:Number = Math.PI*2/_numItems * i;
				var item:Sprite = creatItem();
				item.x = 2*Math.cos(angle) * _radius;
				item.z = 2*Math.sin(angle) * _radius;
				//item.y = 2*Math.sin(angle) * _radius;
				item.rotationY = -360/_numItems * i //+ 90;
				_items.push(item);
			}
			sortItems();
			this.addEventListener(Event.ENTER_FRAME, onEnterFrame);
		}
		
		//深度排序
		private function sortItems():void {
			_items.sort(depthSort);
			for( var i:int = 0; i<_items.length; i++ ) {
				_holder.setChildIndex( _items[i] as Sprite, i );//.addChildAt( _items[i] as Sprite, i );
			}
		}
		
		private function depthSort(objA:DisplayObject, objB:DisplayObject):int {
			var posA:Vector3D = objA.transform.matrix3D.position;
			posA = _holder.transform.matrix3D.deltaTransformVector(posA);
			var posB:Vector3D = objB.transform.matrix3D.position;
			posB = _holder.transform.matrix3D.deltaTransformVector(posB);
			return posB.z - posA.z;
		}
		
		private function creatItem():Sprite {
			var item:Sprite = new Sprite();
			item.graphics.beginFill(Math.random()*0xffffff);
			item.graphics.drawRect(-50,-50,100,100);
			_holder.addChild(item);
			return item;
		}
		
		//item绕Y轴旋转
		private function onEnterFrame(e:Event):void {
			_holder.rotationY += (stage.stageWidth/2 - this.mouseX)*.01;
			_holder.y += (mouseY - _holder.y) * .1;
			sortItems();
		}
	}
}