AS3.0 Bitmap类实现图片3D旋转效果

演示：/Files/zhoujunfeng2011/SWF/单张图片3D旋转效果.swf

源代码：

 

package
{
 import flash.display.Sprite;
 import flash.display.Loader;
 import flash.net.URLRequest;
 import flash.events.Event;
 import flash.display.Bitmap;
 import flash.geom.PerspectiveProjection;
 import flash.geom.Point;
 import flash.display.Shape;
 import flash.geom.Matrix;
 import flash.events.MouseEvent;
 import flash.display.GradientType;

 public class Main extends Sprite
 {
  private var picw:Number = 314;
  private var pich:Number = 391;
  private var gap:Number = 1.5;
  private var speeds:Number = 0.3;
  private var maskshape:Shape = new Shape();
  private var topcont:Sprite = new Sprite();
  private var reftcont:Sprite = new Sprite();
  private var sumcont:Sprite = new Sprite();
  public function Main():void
  {
   init();
  }
  private function init():void
  {
   var loader:Loader = new Loader();
   loader.contentLoaderInfo.addEventListener(Event.COMPLETE,com);
   loader.load(new URLRequest("http://files.cnblogs.com/zhoujunfeng2011/Pictures/http_imgloadCA7PGMNR.jpg"));
  }
  private function com(evt:Event):void
  {
   var loader:Loader = Loader(evt.target.loader);
   var image:Bitmap = Bitmap(loader.content);
   var toppic:Bitmap = new Bitmap(image.bitmapData);
   var reftpic:Bitmap = new Bitmap(image.bitmapData);
   addChild(sumcont);
   topcont.addChild(toppic);
   toppic.x =  -  picw / 2;
   toppic.y =  -  pich / 2;
   reftcont.addChild(reftpic);
   reftpic.x =  -  picw / 2;
   reftpic.y =  -  pich / 2;
   reftcont.rotationX = 180;
   sumcont.addChild(topcont);
   topcont.x = 0;
   topcont.y = pich / 2;
   topcont.z = 500;
   sumcont.addChild(reftcont);
   reftcont.x = reftcont.y;
   reftcont.y = topcont.y + pich + gap;
   reftcont.z = 500;
   var pp:PerspectiveProjection = new PerspectiveProjection();
   pp.fieldOfView = 55;
   pp.projectionCenter = new Point(picw/2,pich/2);
   sumcont.transform.perspectiveProjection = pp;
   sumcont.x = 400;
   sumcont.y = 30;
   reftcont.addChild(maskshape);
   maskshape.x = reftpic.x;
   maskshape.y = reftpic.y;
   drawInMask();
   reftpic.cacheAsBitmap = true;
   maskshape.cacheAsBitmap = true;
   reftpic.mask = maskshape;
   stage.addEventListener(MouseEvent.MOUSE_MOVE,mouseover);
   stage.addEventListener(Event.MOUSE_LEAVE,mouseout);
   sumcont.addEventListener(Event.ENTER_FRAME,onFrameHandler);
  }
  private function drawInMask():void
  {
   var FillType:String = GradientType.LINEAR;
   var mat:Matrix = new Matrix();
   var colors:Array = [0xff0000,0xff0000];
   var alphas:Array = [0,0.5];
   var ratios:Array = [5,255];
   mat.createGradientBox(picw,pich,90*(Math.PI/180));
   maskshape.graphics.lineStyle();
   maskshape.graphics.beginGradientFill(FillType,colors,alphas,ratios,mat);
   maskshape.graphics.drawRect(0,0,picw,pich);
   maskshape.graphics.endFill();
  }
  private function mouseover(evt:MouseEvent):void
  {
   stage.addEventListener(Event.ENTER_FRAME,OnEnter);
  }
  private function mouseout(evt:Event):void
  {
   stage.removeEventListener(Event.ENTER_FRAME,OnEnter);
   speeds = 0.3;
  }
  private function OnEnter(evt:Event):void
  {
   speeds = (this.mouseX - this.stage.stageWidth/2)/40;
  }
  private function onFrameHandler(evt:Event):void
  {
   topcont.rotationY +=  speeds;
   reftcont.rotationY +=  speeds;
  }
 }
}