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再此之前一段时间我曾分享过一个Flex版本的倒影类，接受uicompnent组件作为倒影目标，参考《》！因为用到了一些mx类包下的类及事件，对纯flash组件无法直接支持。

这篇将分享一个ActionScript3 所写的倒影类，支持DisplayObject做为倒影目标，未用到flex相关类包

直接上代码后再解释:

/** * 倒影类 Reflexion  */package taotao.bitmap {import flash.display.*;import flash.events.*;import flash.geom.*;public class Reflexion extends Sprite {private var _disTarget:DisplayObject;private var _numStartFade:Number = .3;private var _numMidLoc:Number = .5;private var _numEndFade:Number = 0;private var _numSkewX:Number = 0;private var _numScale:Number = 1;        private var _bmpReflect:Bitmap;// Constructor/*** 构造函数 * @param set_disTarget 目标* @param set_numStartFade* @param set_numMidLoc* @param set_numEndFade* @param set_numSkewX* @param set_numScale* */public function Reflexion(set_disTarget:DisplayObject, set_numStartFade:Number=0.4, set_numMidLoc:Number=0.2, set_numEndFade:Number=0, set_numSkewX:Number=0, set_numScale:Number=1) {super()_disTarget = set_disTarget;_numStartFade = set_numStartFade;_numMidLoc = set_numMidLoc;_numEndFade = set_numEndFade;_numSkewX = set_numSkewX;_numScale = set_numScale;_bmpReflect = new Bitmap(new BitmapData(1, 1, true, 0));this.addChild(_bmpReflect);createReflection();}// Create reflectionprivate function createReflection(event:Event = null):void {// Reflectionvar bmpDraw:BitmapData = new BitmapData(_disTarget.width, _disTarget.height, true, 0);var matSkew:Matrix = new Matrix(1, 0, _numSkewX, -1 * _numScale, 0, _disTarget.height);var recDraw:Rectangle = new Rectangle(0, 0, _disTarget.width, _disTarget.height * (2 - _numScale));var potSkew:Point = matSkew.transformPoint(new Point(0, _disTarget.height));matSkew.tx = potSkew.x * -1;matSkew.ty = (potSkew.y - _disTarget.height) * -1;bmpDraw.draw(_disTarget, matSkew, null, null, recDraw, true);// Fadevar shpDraw:Shape = new Shape();var matGrad:Matrix = new Matrix();var arrAlpha:Array = new Array(_numStartFade, (_numStartFade - _numEndFade) / 2, _numEndFade);var arrMatrix:Array = new Array(0, 0xFF * _numMidLoc, 0xFF);matGrad.createGradientBox(_disTarget.width, _disTarget.height, 0.5 * Math.PI);shpDraw.graphics.beginGradientFill(GradientType.LINEAR, new Array(0,0,0), arrAlpha, arrMatrix, matGrad)shpDraw.graphics.drawRect(0, 0, _disTarget.width, _disTarget.height);shpDraw.graphics.endFill();bmpDraw.draw(shpDraw, null, null, BlendMode.ALPHA);_bmpReflect.bitmapData.dispose();_bmpReflect.bitmapData = bmpDraw;_bmpReflect.filters = _disTarget.filters;this.x = _disTarget.x;this.y = (_disTarget.y + _disTarget.height) - 1;          }public function reDraw():void{this.createReflection();}}}

说明：

1、以上类参考了所写的倒影类，同时增加了一个reDraw方法，用于根据需要重绘倒影

2、使用时用类似如下方法：

var myRef:Reflexion = new Reflexion(disImg, .4, .2, 0, 0, 1);

sprCon.addChild(myRef);    

其中disImg是目标显示对象，sprCon是disImg的容器，同时也将是倒影的容器。这是一个范例效果截图：

更改你的Reflexion参数数值以达到不同效果！

（本文完）

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