AS3滤镜使用情况

  AS3的代码绘制滤镜，AS3中包含下面滤镜，
    Drop Shadow －－投影滤镜
    Blur －－模糊滤镜
    Glow －－发光滤镜
    Bevel －－斜角滤镜
    Gradient bevel －－渐变斜角滤镜
    Gradient glow －－渐变发光滤镜
    Color matrix －－颜色矩阵滤镜
    Convolution －－卷积滤镜
    Displacement map－－转换图滤镜
关于Blur的使用情况
    var blur:BlurFilter=new BlurFilter(5,5,3);
   var filters:Array=new Array();
   filters.push(blur);
   sprite.filters=filters;
关于Gradient bevel的使用情况
   import flash.display.*;
   import flash.geom.*;
   var fType:String = GradientType.LINEAR;//用指定线性渐变填充的值
   var colors:Array = [ 0xF1F1F1, 0x666666 ];
   var alphas:Array = [ 1, 1 ];
   var ratios:Array = [ 0, 255 ];
   var matr:Matrix = new Matrix();
   matr.createGradientBox( 200, 20, 0, 0, 0 );
   var sprMethod:String = SpreadMethod.PAD;
   var sprite:Sprite = new Sprite();
   var g:Graphics = sprite.graphics;
   g.beginGradientFill( fType, colors, alphas, ratios, matr,   sprMethod );
   g.drawRect( 0, 0, 400, 200 );
   addChild( sprite );
关于使用DropShadowFilter制作投影
            var color:Number = 0x000000;//投影的颜色
            var angle:Number = 45;//投影的角度
            var alpha:Number = 0.8;//投影的透明度
            var blurX:Number = 8;//水平模糊量,0不模糊
            var blurY:Number = 8;//垂直模糊量,0不模糊
            var distance:Number = 15;//投影的距离
            var strength:Number = 1;//强度
            var inner:Boolean = false;//是不是内嵌
            var knockout:Boolean = false;
            var quality:Number = BitmapFilterQuality.HIGH;
            var filter:DropShadowFilter=new DropShadowFilter(distance,
                                        angle,color,alpha,blurX,blurY,
                                        strength,quality,inner,knockout);
           sprite.filters=[filter];
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