跟随鼠标变化的滤镜效果

import?flash.filters.*;//载入滤镜类
//?定义初始斜角滤镜的偏移距离
var?maxbeveldistance:Number?=?5;
//?创建一个斜角滤镜
var?bevel:BevelFilter?=?new?BevelFilter();
//?定义初始斜角滤镜的强度
bevel.strength?=?.6;
//?创建一个投影滤镜
var?dropshadow:DropShadowFilter?=?new?DropShadowFilter();
//投影滤镜初始化
dropshadow.color?=?0x000000;
dropshadow.alpha?=?.75;
dropshadow.blurX?=?10;
dropshadow.blurY?=?10;
//?跟随鼠标变化更新滤镜数据
onMouseMove?=?function(){
?
?//?计算当前鼠标与mc之间的距离差
?var?dx?=?_xmouse?-?myMC._x;
?var?dy?=?_ymouse?-?myMC._y;
?
?//计算距离
?var?distance?=?Math.sqrt(dx*dx?+?dy*dy);
?//?计算偏移角
?var?angle?=?Math.atan2(dy,?dx);
?
?
?//?应用斜角发光的偏移距离和角度
?bevel.distance?=?Math.min(maxbeveldistance,?distance/50);
?bevel.angle?=?180?+?angle?*?180/Math.PI;?//?convert?and?rotate?180?degress
?
?
?//?应用投影偏移距离和角度
?dropshadow.distance?=?distance/20;
?dropshadow.angle?=?180?+?angle?*?180/Math.PI;?//?convert?and?rotate?180?degress
?
?//?在mc上增加滤镜～
?myMC.filters?=?[bevel,?dropshadow];
}
//初始化
onMouseMove();