FLEX和Actionscript开发FLASH游戏8-2-1

FLEX和Actionscript开发FLASH游戏8-2-1
2010年11月26日
　　使用FLEX和Actionscript开发FLASH 游戏-音乐和声效   Enemy.as package {     import flash.geom.Point;     import mx.core.*;     public class Enemy extends AnimatedGameObject     {         static public var pool:ResourcePool=new ResourcePool(NewEnemy);         protected var logic:Function=null;         protected var speed:Number=0;         static public function NewEnemy():Enemy         {             return new Enemy();         }         public function Enemy()         {             super();         }         public function startupBasicEnemy(graphics:GraphicsResource,positi on:Point,speed:Number):void         {             super.startupAnimatedGameObject(graphics,position, ZOrder.PlayerZOrder);             logic=basicEnemyLogic;             this.speed=speed;             this.collisionName=CollisionIdentifiers.ENEMY;         }         override public function shutdown():void         {             super.shutdown();             logic=null;         }         override public function enterFrame(dt:Number):void         {             super.enterFrame(dt);             if(logic!=null)                 logic(dt);         }         protected function basicEnemyLogic(dt:Number):void         {             if(position.y>Application.application.height+graphi cs.bitmap.height)                this.shutdown();             position.y+=speed*dt;         }         override public function collision(other:GameObject):void         {             var animatedGameObject:AnimatedGameObject=AnimatedGame Object.pool.ItemFromPool as AnimatedGameObject;             animatedGameObject.startupAnimatedGameObject(Resou rceManager.BigExplosionGraphics,newPoint(             position.x+graphics.bitmap.width/graphics.frames/2 -            ResourceManager.BigExplosionGraphics.bitmap.width/ ResourceManager.BigExplosionGraphics.bitmap.height/ 2),             ZOrders.PlayerZOrder,true);             this.shutdown();             ResourceManager.ExplosionFX.play();         }     } } 仅仅调用一次play函数我们就能播放声效。我曾讲过FlEX使得播放声音相当简单。Player类中生成一个武器时（在enterFrame函数里）调用相似的play函数，当被击毁时（在collision函数里）也调用之。在本文末下载源代码来查看这些改变。
　　播放背景音乐的进程是相似的，但是这里我们需要采取一些额外的步骤，因为我们需要能够在退出这一级时手工地停止音乐（例如当我们离开Game状态）。现在让我们看看在Level类中做的改变。 类别：flex 开发,组件