[ActionScript 3.0] 翻牌效果，运用语法rotationY，PerspectiveProjection

package
{
    import com.tweener.transitions.Tweener;
    
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Sprite;
    import flash.events.MouseEvent;
    import flash.geom.PerspectiveProjection;
    import flash.geom.Point;
    import flash.utils.getDefinitionByName;
    import flash.utils.setTimeout;
    
    /**
     * @author Frost.Yen
     * @E-mail 871979853@qq.com
     * @create 2015-7-29 下午4:53:03
     *
     */
    [SWF(width="1024",height="768",backgroundColor = "0x000000")]
    public class FlipCard extends Sprite
    {
        [Embed(source="card.png")] 
        private var _card:Class;
        [Embed(source="back.jpg")] 
        private var _back:Class;
        public function FlipCard()
        {
            initViews();
        }
        private function initViews():void
        {
            var cardClass:Class = getDefinitionByName("FlipCard__card") as  Class; 
            var backClass:Class = getDefinitionByName("FlipCard__back") as  Class; 
            var cardBitmap:Bitmap = new cardClass();
            var backBitmap:Bitmap = new backClass();
            
            for(var i:int = 0;i<18;i++){
                var card:Card = new Card();
                var backBmp:Bitmap = new Bitmap();
                var cardBmp:Bitmap = new Bitmap();
                var backBmpd:BitmapData = new BitmapData(backBitmap.width,backBitmap.height);
                var cardBmpd:BitmapData = new BitmapData(cardBitmap.width,cardBitmap.height);
                backBmpd.draw(backBitmap);
                cardBmpd.draw(cardBitmap);
                backBmp.bitmapData = backBmpd;
                cardBmp.bitmapData = cardBmpd;
                cardBmp.width = backBmp.width = 79;
                cardBmp.height = backBmp.height = 115;
                card.getCard(cardBmp,backBmp);
                card.x = 200 + i%6*110+79*0.5;
                card.y = 100 + Math.floor(i/6)*140+115*0.5;
                this.addChild(card);
                var perspective:PerspectiveProjection = new PerspectiveProjection();
                perspective.projectionCenter = new Point(card.x,card.y)
                card.transform.perspectiveProjection = perspective;
            }
            setTimeout(turnTheCard,1000*2);
        }
        private function onCardClick(e:MouseEvent):void
        {
            turnTween(e.currentTarget as Card);
        }
        private function turnTheCard():void
        {
            for(var i:int = 0;i<this.numChildren;i++){
                turnTween(this.getChildAt(i) as Card);
                this.getChildAt(i).addEventListener(MouseEvent.CLICK,onCardClick);
            }
        }
        private function turnTween(card:Card):void
        {
            Tweener.addTween(card,{rotationY:90,time:0.3,transition:"linear",onComplete:onComplete,onCompleteParams:[card]});    
            function onComplete(obj:Card):void
            {
                obj.swapCard();
                Tweener.addTween(obj,{rotationY:180,time:0.3,transition:"linear",onComplete:function():void{obj.rotationY = 0;obj.setRotationY();}});
            }
        }
    }
}
import flash.display.Bitmap;
import flash.display.Sprite;

class Card extends Sprite{
    private var _back:Sprite;
    private var _card:Sprite;
    private var _rotationY:Number;
    public function Card(){
        _back = new Sprite();
        _card = new Sprite();
        this.addChild(_back);
        this.addChild(_card);
    }
    public function getCard(card:Bitmap,back:Bitmap):void
    {
        card.x = back.x = -back.width*0.5;
        card.y = back.y = -back.height*0.5;
        _card.addChild(card);
        _back.addChild(back);
    }
    
    public function swapCard():void
    {
        this.swapChildren(_card,_back);
        setRotationY();
    }
    public function setRotationY():void
    {
        if(this.rotationY == 90){
            _card.rotationY = _back.rotationY = 180;
        }else if(this.rotationY == 0){
            _card.rotationY = _back.rotationY = 0;
        }
    }
}