flash as 3.0 制作一个旋转 影片剪辑

 
 
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var temp:int;
stage.addEventListener("mouseMove",rota);//为舞台添加一个监听
var tempNumsin:Number = 0;
var tempNumcos:Number = 0;
var ganX:Number =0;
var ganY:Number = 0;
function rota(event:Event):void {
    //计算出dx，和dy
    var dx:Number = a1.x - stage.mouseX;
    var dy:Number = a1.y - stage.mouseY;
    //计算出角度
    var angle:Number = Math.atan2(dx,dy);
    a1.rotation =  -angle *180/ Math.PI;
    //注意sin里面的值不能为数必须转换为角度
    tempNumsin = Math.abs(Math.sin(a1.rotation*Math.PI/180));
    tempNumcos = Math.abs(Math.cos(a1.rotation*Math.PI/180));
    if (a1.rotation <= 0) {
        ganX = a1.x - tempNumsin * 390;
        ganY = a1.y - tempNumcos* 390;
    } else {
        ganX = a1.x + tempNumsin * 390;
        ganY = a1.y - tempNumcos * 390;
    }
}

 





posted @ 2012-12-19 12:46  thero  阅读(229)  评论(0)    收藏  举报