1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | 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; } } |