//HEADER -------------------------------------//< GameObject - base class for an actual in game object of any kindclass GameObject : public ListItem{public:	GameObject() {;};protected:	virtual	void		Init		(GameObjectParams* params) = 0;	friend class GameObjectParams;};

//HEADER -------------------------------------//< GameObjectParams - base class for a block of parameters that describe an in game objectclass GameObjectParams : public ListItem{public:	GameObjectParams(){;};protected:		virtual GameObject*	Create		() = 0;  //< this does the creating of objects	virtual void		SetDefaults	(){;};	 //< set any values in these parameters to default values	virtual const uint	GetTypeID	() = 0;  //< each parameter object should return a different (preferably unique) value from this	friend class GameObjectParamsManager;};

//HEADER-------------------------------------//< GameObjectParamsManager - a class that contains a list of all possible parameter objectsclass GameObjectParamsManager{public:	GameObjectParamsManager(){;};	~GameObjectParamsManager(){ m_Parameters.Empty();};	GameObjectParams*	GetParams	(const uint typeID); //< search the parameters list and return one of the right type if it exists	GameObject*		CreateGameObject(GameObjectParams* params); //< create a game object from a series of parameters	void			AddParameters	(GameObjectParams* params);	//< add a parameter object for a specific type of game objectprivate:	GameObjectParams*	NextParam	(GameObjectParams* curr); //< get the next parameter object in the m_Parameters list	List					m_Parameters;};// CPP ----------------------------------GameObjectParams* GameObjectParamsManager::GetParams(const uint typeID){	GameObjectParams*	params = NULL;	while((params = NextParam(params)))	 //< single equals intended	{		if (typeID == params->GetTypeID())		{			params->SetDefaults();			return params;		}	}	return NULL;}GameObject*	GameObjectParamsManager::CreateGameObject(GameObjectParams* params){	if (params)	{		GameObject* object = params->Create();		if (object)		{			object->Init(params);			return object;		}		//< you could throw an exception here if you wnted to.	}	return NULL;}

//< EXAMPLE CODE//< HEADER#define UID_ObjectTypeA		1210508			//< this can be any number as long as it's unique within the scope of your game - use RTTI instead if you likeclass GameObjectTypeA : public GameObject{public:	int			m_ObjectAData;protected:	virtual	void		Init			(GameObjectParams* params)}class GameObjectTypeAParams : public GameObjectParams{public:	int			m_ObjectAData;protected:	virtual GameObject*	Create		() { return new GameObjectTypeA;};	virtual void		SetDefaults	() { ObjectAData = 0;};	virtual const uint	GetTypeID	() { return UID_ObjectTypeA;};}//< GAME OBJECT SOURCEvoid GameObjectTypeA::Init(GameObjectParams* params){	GameObjectTypeAParams* tparams = (GameObjectTypeAParams*) params; //< this cast is always safe - but feel free to use templates, dynamic casting or what ever here	///< transfer the parameters	m_ObjectAData = tparams->m_ObjectAData;}

//< SOURCEvoid MyGame::AddGameObjectParams(GameObjectParamsManager& GameObjectMan){	//< add all the different types of game parameters into the manager	GameObjectMan.AddParameters(new GameObjectTypeAParams);	/* obviously new object type would need new calls such as below	GameObjectMan.AddParameters(new GameObjectTypeBParams);	GameObjectMan.AddParameters(new GameObjectTypeCParams);	GameObjectMan.AddParameters(new GameObjectTypeDParams);	*/}void MyGame::CreateGameObjects(GameObjectParamsManager& GameObjectMan){	GameObjectParams* params = GameObjectMan.GetParams(UID_ObjectTypeA);	if (params)	{		//< cast and fill in any changes to the default parameters here		GameObject* object = GameObjectMan.CreateGameObject(params);				//< add the created object to your game		m_GameObjectsList.InsertAtEnd(object);	//< 	}	else	{		//< throw an exception or what ever you fancy here	}}