1 package {
 2     import flash.display.Sprite;
 3     import flash.filters.BitmapFilter;
 4     import flash.filters.BitmapFilterQuality;
 5     import flash.filters.BitmapFilterType;
 6     import flash.filters.GradientBevelFilter;
 7
 8     public class GradientBevelFilterExample extends Sprite {
 9         private var bgColor:uint     = 0xCCffCC;
10         private var size:uint        = 400;
11         private var offset:uint      = 50;
12
13         //设置偏移距离，和angleInDegree一起使用，60表示偏移的距离大小
14         private var distance:Number  = 60;
15         //设置偏移方向，270表示向正方向偏移
16         private var angleInDegree:Number = 270;
17         //设置用于渐变的颜色的集合
18         private var colors:Array     = [0xFF0000, 0xFF0000, 0xff0000, 0xff0000,0xFFffff];
19         //通过透明度的递减来实现渐变效果，和颜色对应
20         private var alphas:Array     = [0.6, 0.4, 0.3, 0.2,0.1];
21         private var ratios:Array     = [0,150,185, 220, 255];
22         //该属性控制在X方向渐变的范围
23         private var blurX:Number     = 300;
24         //该属性控制在Y方向起作用的渐变范围
25         private var blurY:Number     = 200;
26         //改属性控制颜色的区分度
27         private var strength:Number  = 1;
28         private var quality:Number   = BitmapFilterQuality.HIGH;
29         //改属性控制渐变扩散的方向，向内还是向外,还是既内又外
30         private var type:String      = BitmapFilterType.INNER;
31         private var knockout:Boolean = true;
32
33         public function GradientBevelFilterExample() {
34             draw();
35             var filter:BitmapFilter = getBitmapFilter();
36             var myFilters:Array = new Array();
37             myFilters.push(filter);
38             filters = myFilters;
39         }
40
41
42         private function getBitmapFilter():BitmapFilter {
43             return new GradientBevelFilter(distance,
44                 angleInDegree,
45                 colors,
46                 alphas,
47                 ratios,
48                 blurX,
49                 blurY,
50                 strength,
51                 quality,
52                 type,
53                 knockout);
54         }
55
56         private function draw():void {
57             graphics.beginFill(bgColor);
58             graphics.drawRect(offset, offset, size, size);
59             graphics.endFill();
60         }
61     }
62 }