AS3代码 心跳

AS3代码 心跳 package { import flash.display.Sprite; import flash.events.Event; public class Pulse extends Sprite { private var ball:Ball; private var angle:Number = 0; private var centerScale:Number = 1; private var range:Number = .5; private var speed:Number = .2; public function Pulse() { init(); } private function init():void { ball = new Ball(); addChild(ball); ball.x = stage.stageWidth / 2; ball.y = stage.stageHeight / 2; addEventListener(Event.ENTER_FRAME, onEnterFrame); } public function onEnterFrame(event:Event):void { ball.scaleX = ball.scaleY = centerScale + Math.sin(angle) * range; angle += speed; } } } } public function onEnterFrame(event:Event):void { ball.scaleX = ball.scaleY = centerScale + Math.sin(angle) * range; angle += speed; } } }