FLEX和Actionscript开发FLASH游戏 3-2

FLEX和Actionscript开发FLASH游戏 3-2
2010年10月26日
　　使用FLEX和Actionscript开发FLASH 游戏-嵌入资源等
　　package
　　{
　　import flash.display.*;
　　import mx.collection.*;
　　import mx.core.*;
　　public class GameObjectManager
　　{
　　//double buffer
　　public var backBuffer:BitmapData;
　　//colour to use to clear backbuffer with
　　public var clearColor: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 avoid adding items
　　//a 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();
　　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,Application.applica tion.height,false);
　　}
　　public function startup():void 
　　{
　　lastFrame=new Date();
　　new Bounce().startupBounce();
　　}
　　public function shutdown():void
　　{
　　shutdownAll();
　　}
　　public function enterFrame():void
　　{
　　//Calculate the time since the lastframe
　　var thisFrame：Date=new Date();
　　var seconds:Number=(thisFrame.getTime()-lastFrame.getT ime())/1000.0;
　　lastFrame=thisFrame;
　　removeDeletedGameObjects();
　　insertNewGameObjects();
　　//now allow objects to update themselves
　　for each(var gameObject:GameObject in gameObjects)
　　{
　　if(gameObject.inuse)
　　gameObject.enterFrame(seconds);
　　}
　　drawObjects();
　　}         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):viod         {             newGameObjects.addItem(gameObject);         }         public function removeGameObject(gameObject:GameObject):void         {             removedGameObjects.addItem(gameObject);         }         protected function shutdownAll():void         {             //don't dispose objects twice             for each(var gameObject:GameObject in gameObjects)             {                 var found:Boolean=false;                 for each (var removedObject:GameObject in removedGameObjects)                 {                     if(removedObject==gameObject)                           {                                  found=true;                         break;                          }                 }                 if (!found)                     gameObject.shutdown();             }         }         protected function insertNewGameObjects():void         {             for each(var gameObject:GameObject in newGameObjects)             {                 for (var i:int=0;igameObject.zOrde r||                         gameObjects.getItemAt(i).zOrder==-1)                               break;                    }                         gameObjects.addItemAt(gameObject,i);               }                newGameObjects.removedAll();         }         protected function removedDeletedGameObjects():void         {              //insert the object acording to it's z position             for each(var removedObject:GameObject in removedGameObjects)                {                    var i:int=0;                    for (i=0;i<gameObjects.length;++i)                    {                       if(gameObjects.getItemAt(i)==removedObject)                          {                              gameObjects.removeItemAt(i);                              break;                          }                  }           }                removedGameObjects.removedAll();         }     }