FLEX和Actionscript开发FLASH游戏6-2(1)

FLEX和Actionscript开发FLASH游戏6-2(1)
2010年11月16日
　　使用FLEX和Actionscript开发FLASH 游戏-碰撞检测 GameObjectManager.as package {     import flash.display.*;     import flash.events.*;     import flash.utils.*;     import mx.collections.*;     import mx.core.*;     public class GameObjectManager     {         //double buffer         public var backBuffer:BitmapData;         //colour to use to clear backbuffer with         public var clearColour:uint=0xFF0043AB;         //static instance         protected static var instance:GameObjectManager=null;         //the last frame time         protected var lastFrame:Date;         //a collection of the GameObjects         protected var gameObjects:ArrayCollection=new ArrayCollection();         // a collection where new GameObjects are placed,to void adding items         //to gameObjects while in the gameObjects collection while it is in a loop         protected var newGameObjects:ArrayCollection=new ArrayCollection();         //a collection where removed GameObjects are placed,to avoid removing items         //to gameObjects while in the gameObjects collection while it is in a loop         protected var removedGameObjects:ArrayCollection=new ArrayCollection();         protected var collisionMap:Dictionary=new Dictionary();         static public function get Instance():GameObjectManager         {             if(instance==null)                 instance=new GameObjectManager();             return instance;         }         public function GameObjectManager()         {             if(instance!=null)                 throw new Error("Only one Singleton instance should be instantiated");             backBuffer=new BitmapData(Application.application.width,Applicati on.application.height,false);         }         public function startup():void         {             lastFrame=new Date();         }         public function shutdown():void         {             shutdownAll();         }         public function enterFrame():void         {             //Calculate the time since the last frame             var thisFrame:Date=new Date();             var seconds:Number=(thisFrame.getTime()-lastFrame.getT ime())/1000.0;             lastFrame=thisFrame;             removeDeletedGameObjects();             insertNewGameObjects();             Level.Instance.enterFrame(seconds);             checkCollisions();             //now allow objects to update themselves             for each(var gameObject:GameObject in gameObjects)             {                 if(gameObject.inuse)                     gameObject.enterFrame(seconds);             }             drawObjects();         }         public function click(event:MouseEvent):void         {             for each(var gameObject:GameObject in gameObjects)             {                 if(gameObject.inuse)                     gameObject.click(event);             }         }         public function mouseDown(event:MouseEvent):void         {             for each(var gameObject:GameObject in gameObjects)             {                 if(gameObject.inuse)                     gameObject.mouseDown(event);             }         }         public function mouseUp(event:MouseEvent):void         {             for each(var gameObject:GameObject in gameObjects)             {                 if(gameObject.inuse)                     gameObject.mouseUp(event);             }         }        public function mouseMove(event:MouseMove):void         {             for each(var gameObject:GameObject in gameObjects)             {                 if(gameObject.inuse)                     gameObject.mouseMove(event);             }         }         protected function drawObjects():void         {             backBuffer.fillRect(backBuffer.rect,clearColor);             //draw the objects             for each(var gameObject:GameObject in gameObjects)             {                 if(gameObject.inuse)                     gameObject.copyToBackBuffer(backBuffer);             }         }         public function addGameObject(gameObject:GameObject):void         {             newGameObjects.addItem(gameObject);         }         public function removeGameObject(gameObject:GameObject):void         {             removedGameObjects.addItem(gameObject);         }