弹跳的小球

来源：互联网发布：黄漫软件编辑：程序博客网时间：2024/04/28 03:33

跳动小球

package {import flash.display.Sprite;import flash.display.MovieClip;import flash.events.Event;import flash.ui.Keyboard;import flash.events.KeyboardEvent;public class  main extends Sprite{public var ball:Sprite;public var border:Sprite;public var vy:Number = 0;public var g:Number = 0.9;public function main(){//stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);//stage.addEventListener(KeyboardEvent.KEY_UP, keyUpHandler);addEventListener(Event.ENTER_FRAME,frameHandler);}/*public function keyDownHandler(e:KeyboardEvent):void{//trace("键盘按下");switch(e.keyCode){case Keyboard.LEFT:vx = -5;break;case Keyboard.RIGHT:vx = 5;break;}}public function keyUpHandler(e:KeyboardEvent):void{//trace("键盘抬起");switch(e.keyCode){case Keyboard.LEFT:vx = 0;break;case Keyboard.RIGHT:vx = 0;break;}}*/public function frameHandler(e:Event):void{vy += g;ball.y += vy;//if (ball.y >= border.y-ball.height)if(ball.hitTestObject(border)){ball.y = border.y - ball.height;vy = -20;}}}}

0 0