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ActionScript3 制作倒影

    博客分类:
  • Flex
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倒影类:
package com.flashdev.bitmap ...{
    
    
/**//*
            
    Written by:
    Dustin Andrew
    dustin@flash-dev.com
    www.flash-dev.com
    
    LAST UPDATED:
    01/24/06
    
    Reflection.as
    
    Create a bitmap reflection of a displayobject    
            
    
*/

    
    
import flash.display.*;
    
import flash.geom.*;
    
import flash.events.*;

    
public class Reflection 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
        public function Reflection(set_disTarget:DisplayObject, set_numStartFade:Number, set_numMidLoc:Number, set_numEndFade:Number, set_numSkewX:Number, set_numScale:Number) ...{
            
super()
            _disTarget 
= set_disTarget;
            _numStartFade 
= set_numStartFade;
            _numMidLoc 
= set_numMidLoc;
            _numEndFade 
= set_numEndFade;
            _numSkewX 
= set_numSkewX;
            _numScale 
= set_numScale;
            
            _bmpReflect 
= new Bitmap(new BitmapData(11true0));
            
this.addChild(_bmpReflect);
            createReflection();
        }

        
        
// Create reflection
        private function createReflection(event:Event = null):void ...{
            
            
// Reflection
            var bmpDraw:BitmapData = new BitmapData(_disTarget.width, _disTarget.height, true0);
            var matSkew:Matrix 
= new Matrix(10, _numSkewX, -1 * _numScale, 0, _disTarget.height);
            var recDraw:Rectangle 
= new Rectangle(00, _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, 
nullnull, recDraw, true);
            
            
// Fade
            var shpDraw:Shape = new Shape();
            var matGrad:Matrix 
= new Matrix();
            var arrAlpha:Array 
= new Array(_numStartFade, (_numStartFade - _numEndFade) / 2, _numEndFade);
            var arrMatrix:Array 
= new Array(00xFF * _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(
00, _disTarget.width, _disTarget.height);
            shpDraw.graphics.endFill();
            bmpDraw.draw(shpDraw, 
nullnull, BlendMode.ALPHA);
            
            _bmpReflect.bitmapData.dispose();
            _bmpReflect.bitmapData 
= bmpDraw;
            
            _bmpReflect.filters 
= _disTarget.filters;
            
            
this.x = _disTarget.x;
            
this.y = (_disTarget.y + _disTarget.height) - 1;          
        }

    }

}
 
测试类:
package ...{
    
    
import com.flashdev.bitmap.*;    
    
import flash.display.*;
    
import flash.events.*;
    
import flash.net.*;
    
import flash.filters.*;

    
public class ReflectionTest extends Sprite ...{
        
        
// Constructor
        public function ReflectionTest() ...{
            
// Setup stage
            this.stage.align = StageAlign.TOP_LEFT;
            
this.stage.scaleMode = StageScaleMode.NO_SCALE;
            
            
// Load image
            var loadImg:Loader = new Loader();
            loadImg.contentLoaderInfo.addEventListener(Event.COMPLETE, onImgLoaded);
            loadImg.load(
new URLRequest("image.jpg"));
        }

        
        
// Called when image is loaded
        private function onImgLoaded(event:Event):void ...{
            
            var sprImg:Sprite 
= new Sprite();
            
            
// Attach image
            var disImg:DisplayObject = event.target.content;
            var filGlow:GlowFilter 
= new GlowFilter(0x000000, .38813falsefalse);
            disImg.filters 
= [filGlow];
            sprImg.addChild(disImg);
            
            
// Add reflection
            var sprReflect:Reflection = new Reflection(disImg, .4, .2001);
            sprImg.addChild(sprReflect);            
            
            
// Center
            sprImg.x = (this.stage.stageWidth - sprImg.width) / 2;
            sprImg.y 
= (this.stage.stageHeight - sprImg.height) / 2;
            
            
this.addChild(sprImg);
        }

    }

}

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