GameCodingCompleteLinux/Source/GCC4/GameCode4/BaseGameLogic.h

#pragma once
//========================================================================
// BaseGameLogic.h : Defines the Base Game Logic class 
//
// Part of the GameCode4 Application
//
// GameCode4 is the sample application that encapsulates much of the source code
// discussed in "Game Coding Complete - 4th Edition" by Mike McShaffry and David
// "Rez" Graham, published by Charles River Media. 
// ISBN-10: 1133776574 | ISBN-13: 978-1133776574
//
// If this source code has found it's way to you, and you think it has helped you
// in any way, do the authors a favor and buy a new copy of the book - there are 
// detailed explanations in it that compliment this code well. Buy a copy at Amazon.com
// by clicking here: 
//    http://www.amazon.com/gp/product/1133776574/ref=olp_product_details?ie=UTF8&me=&seller=
//
// There's a companion web site at http://www.mcshaffry.com/GameCode/
// 
// The source code is managed and maintained through Google Code: 
//    http://code.google.com/p/gamecode4/
//
// (c) Copyright 2012 Michael L. McShaffry and David Graham
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser GPL v3
// as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See 
// http://www.gnu.org/licenses/lgpl-3.0.txt for more details.
//
// You should have received a copy of the GNU Lesser GPL v3
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
//========================================================================

#include "interfaces.h"

#include "../Utilities/Math.h"
#include "../Actors/Actor.h"
#include "../Actors/ActorFactory.h"

#include <vector>

class LevelManager;

enum BaseGameState
{
	BGS_Invalid,
	BGS_Initializing,
	BGS_MainMenu,
	BGS_WaitingForPlayers,
	BGS_LoadingGameEnvironment,
	BGS_WaitingForPlayersToLoadEnvironment,
	BGS_SpawningPlayersActors,
	BGS_Running
};

typedef std::map<ActorId, StrongActorPtr> ActorMap;
typedef std::string Level;

class LevelManager
{
public:
	const std::vector<Level> &GetLevels() const { return m_Levels; }
	const int GetCurrentLevel() const { return m_CurrentLevel; }
	bool Initialize(std::vector<std::string> &levels);

protected:
	std::vector<Level> m_Levels;
	int m_CurrentLevel;
};



class BaseGameLogic : public IGameLogic
{
	friend class GameCodeApp;						// This is only to gain access to the view list

protected:
	float m_Lifetime;								//indicates how long this game has been in session
	BaseGameState m_State;							// game state: loading, running, etc.
	ActorMap m_actors;
	int m_ExpectedPlayers;							// how many local human players
	int m_ExpectedRemotePlayers;					// expected remote human players
	int m_ExpectedAI;								// how many AI players
	int m_HumanPlayersAttached;
	int m_AIPlayersAttached;
	int m_HumanGamesLoaded;
	GameViewList m_gameViews;						// views that are attached to our game
	ActorFactory* m_pActorFactory;
	
	bool m_bProxy;									// set if this is a proxy game logic, not a real one

	bool m_RenderDiagnostics;						// Are we rendering diagnostics?

	LevelManager* m_pLevelManager;					// Manages loading and chaining levels

public:

	BaseGameLogic();
	virtual ~BaseGameLogic();
	bool Init(void);

	void SetProxy(bool isProxy) 
	{ 
		m_bProxy = isProxy; 
	}
	const bool IsProxy() const { return m_bProxy; }

	// [mrmike] CanRunLua() is a bit of a hack - but I can't have Lua scripts running on the clients. They should belong to the logic.
	// FUTURE WORK - Perhaps the scripts can have a marker or even a special place in the resource file for any scripts that can run on remote clients
	const bool CanRunLua() const { return !IsProxy() || GetState()!=BGS_Running; }

	virtual void VAddView(std::shared_ptr<IGameView> pView, ActorId actorId=INVALID_ACTOR_ID);
	virtual void VRemoveView(std::shared_ptr<IGameView> pView);

	virtual StrongActorPtr VCreateActor(
		const std::string &actorResource,
		TiXmlElement *overrides,
		std::optional<const glm::mat4> initialTransform=std::nullopt,
		const ActorId serversActorId=INVALID_ACTOR_ID					// [rez] note: don't store this strong pointer outside of this class
	);
	virtual void VDestroyActor(const ActorId actorId);
	virtual WeakActorPtr VGetActor(const ActorId actorId);
	virtual void VModifyActor(const ActorId actorId, TiXmlElement *override);

	// Level management
	const LevelManager* GetLevelManager() { return m_pLevelManager; }
	virtual bool VLoadGame(const char* levelResource) override;  // [rez] Subclasses shouldn't override this function; use VLoadGameDelegate() instead
	virtual void VSetProxy();

	// Logic Update
	virtual void VOnUpdate(float time, float elapsedTime);

	// Changing Game Logic State
	virtual void VChangeState(BaseGameState newState);
	const BaseGameState GetState() const { return m_State; }

	// Render Diagnostics
	void ToggleRenderDiagnostics() { m_RenderDiagnostics = !m_RenderDiagnostics; }
	virtual void VRenderDiagnostics();

protected:
	virtual ActorFactory* VCreateActorFactory(void);

	// [rez] Override this function to do any game-specific loading.
    virtual bool VLoadGameDelegate(TiXmlElement* pLevelData) { return true; }
};