[ActionScript 3.0] 实现放大镜效果的简单方法

//mc和bgmc是同一对象的不同实例

//mc放大的对象

//bgmc源对象

//mag放大镜

var scale:Number = 1.3;//放大倍数
mc.mask = mag;
mag.startDrag();
mc.scaleX = mc.scaleY = scale;
addEventListener(Event.ENTER_FRAME,onEnter);
function onEnter(e:Event):void
{
    mag.x = mouseX;
    mag.y = mouseY;
    mc.x =  -  scale * mag.x - bgmc.x + mag.x;
    mc.y =  -  scale * mag.y - bgmc.y + mag.y;
}