自学教程：C++ Game函数代码示例

/*************************************************************************  游戏剧情的章节转换************************************************************************/void Controller::ChangeChapter(int nChapterID){	if (nChapterID != CHAPTER_1 && nChapterID != CHAPTER_2 && nChapterID != CHAPTER_3 && nChapterID != CHAPTER_4)	{		return;	}	vector<Player*> playerList = Game()->GetPlayerManager()->GetPlayerList();	if (m_nCurrentChapter != CHAPTER_0)	{		for (int i = 0; i < playerList.size(); ++i)		{			playerList[i]->Action(CodeMsg::code_player_static,right_direction);		}	}	// 设置当前章节的ID	m_nCurrentChapter = nChapterID;		// 先让玩家停止		// 暂停游戏	SuspendGame();	// 移除地图上所有的怪物 	Game()->GetMonsterManager()->RemoveAllMonster();						// 移除地图上所有的装备	Game()->GetEquipmentManager()->RemoveAllEquipment();				// 当前选中的怪物置为空	m_pCurrentSelectedMonster = 0;															// 新建一个boss（每个章节的Boss都不一样）	m_pBoss = Game()->GetMonsterManager()->CreateBoss();					// 场景转换	Game()->GetSceneManager()->ChangeScene(nChapterID);					// 继续游戏	ContinueGame();}

bool CGameWindow::KeyPress(int c){	if (BaseClass::KeyPress(c))		return true;	if (GameServer() && GameServer()->GetCamera())		GameServer()->GetCamera()->KeyDown(c);	if (Game())	{		for (size_t i = 0; i < Game()->GetNumLocalPlayers(); i++)		{			CPlayer* pPlayer = Game()->GetLocalPlayer(i);			pPlayer->KeyPress(c);		}	}	return false;}

void CGameServer::SetClientNickname(int iClient, const tstring& sNickname){	if (iClient == GetClientIndex() && Game()->GetNumLocalPlayers())	{		Game()->GetLocalPlayer(0)->SetPlayerName(sNickname);		return;	}	for (size_t i = 0; i < Game()->GetNumPlayers(); i++)	{		if (Game()->GetPlayer(i)->GetClient() == iClient)		{			Game()->GetPlayer(i)->SetPlayerName(sNickname);			return;		}	}	TMsg(sprintf(tstring("Can't find client %d to give nickname %s./n"), iClient, sNickname.c_str()));}

void CGameServer::RestartLevel(){	SetLoading(false);	AllowPrecaches();	DestroyAllEntities(tvector<tstring>(), true);	m_bRestartLevel = true;	Game()->SetupGame(CVar::GetCVarValue("game_mode"));	m_bRestartLevel = false;	SetLoading(false);}

void CGame::Load(){	m_iMonsterTexture = GetRenderer()->LoadTextureIntoGL("monster.png");	m_iCrateTexture = GetRenderer()->LoadTextureIntoGL("crate.png");	m_iNormalTexture = GetRenderer()->LoadTextureIntoGL("normal.png");	GraphReset();	m_projectile_initial_time = Game()->GetTime();	m_projectile_initial_position = Vector(2, 1, 2);	m_projectile_initial_velocity = Vector(-1, 3, -1) * 5;	m_projectile_gravity = Vector(0, -5, 0);	m_projectile_break_time = Game()->GetTime() + PredictProjectileMaximumHeightTime(m_projectile_initial_velocity, m_projectile_gravity);	m_projectile_number = 1;	// Fire the first one	m_projectile_position[0] = m_projectile_initial_position;	m_projectile_velocity[0] = m_projectile_initial_velocity;}

Game RoxdokuGame::createGame(int difficulty, int symmetry) {	if(!m_graph) {		m_graph = new SKGraph(m_order, TypeRoxdoku);		m_graph->initRoxdoku();	}	Puzzle* puzzle = new Puzzle(m_graph, true);	puzzle->init(difficulty, symmetry);	return Game(puzzle);}

bool CGameServer::LoadFromFile(const tchar* pFileName){	if (!GameServer())		return false;	GameServer()->Initialize();	// Erase all existing entites. We're going to load in new ones!	GameServer()->DestroyAllEntities();	std::ifstream i;	i.open(pFileName, std::ios_base::binary|std::ios_base::in);	char szTag[8];	i.read(szTag, 8);	if (strncmp(szTag, "GameSave", 8) != 0)		return false;	CGameServer* pGameServer = GameServer();	size_t iLoadCRC;	i.read((char*)&iLoadCRC, sizeof(iLoadCRC));	if (iLoadCRC != pGameServer->m_iSaveCRC)		return false;	i.read((char*)&pGameServer->m_flGameTime, sizeof(pGameServer->m_flGameTime));	size_t iEntities;	i.read((char*)&iEntities, sizeof(iEntities));	for (size_t j = 0; j < iEntities; j++)	{		if (!CBaseEntity::UnserializeEntity(i))			return false;	}	for (size_t i = 0; i < GameServer()->GetMaxEntities(); i++)	{		if (!CBaseEntity::GetEntity(i))			continue;		CBaseEntity::GetEntity(i)->ClientEnterGame();	}	Game()->EnterGame();	if (GameServer()->GetWorkListener())		GameServer()->GetWorkListener()->SetAction("Encountering resistance", 0);	GameServer()->SetLoading(false);	return true;}

void COverlappedWindow::startNewGame() {	getGameInfo().isFirstNextStep = true;	setWindowSize();	game = Game(getGameInfo().widthGridNumber, getGameInfo().heightGridNumber);	isGameStarted = true;	isDoneFirstStep = false;	::InvalidateRect(handle, 0, 0);}

void CUIMpTradeWnd::OnBtnOkClicked(CUIWindow* w, void* d){	DeleteHelperItems();	CheckDragItemToDestroy				();	StorePreset							(_preset_idx_last, true, false, false);	HideDialog							();	game_cl_mp* clgame					= smart_cast<game_cl_mp*>(&(Game()));	VERIFY(clgame);	clgame->OnBuyMenu_Ok					();//.	StorePreset							(_preset_idx_last, true, true);}

bool CActor::CanSprint			(){	bool can_Sprint = CanAccelerate() && !conditions().IsCantSprint() &&						Game().PlayerCanSprint(this)						&& CanRun()						&& !(mstate_real&mcLStrafe || mstate_real&mcRStrafe)						&& InventoryAllowSprint()						;	return can_Sprint;}

int game_cl_Deathmatch::GetPlayersPlace			(game_PlayerState* ps){	if (!ps) return -1;	game_cl_GameState::PLAYERS_MAP_IT I=Game().players.begin();	game_cl_GameState::PLAYERS_MAP_IT E=Game().players.end();	// create temporary map (sort by kills)	xr_vector<game_PlayerState*>	Players;	for (;I!=E;++I)		Players.push_back(I->second);	std::sort			(Players.begin(),Players.end(),DM_Compare_Players);	int Place = 1;	for (u32 i=0; i<Players.size(); i++)	{		if (Players[i] == ps)			return Place;		Place++;	};	return -1;}

s32 UITeamState::GetSummaryFrags() const{	typedef game_cl_GameState::PLAYERS_MAP::const_iterator PlCIter;	game_cl_GameState::PLAYERS_MAP & playersMap = Game().players;		s32		sum = 0;	PlCIter	eiter = playersMap.end();	for (PlCIter i = playersMap.begin(); i != eiter; ++i)	{		game_PlayerState*	ps = i->second;		if (!ps)			continue;		game_cl_mp* tempGame = smart_cast<game_cl_mp*>(&Game());		R_ASSERT(tempGame);		if (static_cast<ETeam>(tempGame->ModifyTeam(ps->team)) == myTeam)			sum = sum + ps->m_iRivalKills;	}	return sum;}

/*===============idCommonLocal::NetReceiveUsercmds===============*/void idCommonLocal::NetReceiveUsercmds( int peer, idBitMsg& msg ){	int clientNum = Game()->MapPeerToClient( peer );	if( clientNum == -1 )	{		idLib::Warning( "NetReceiveUsercmds: Could not find client for peer %d", peer );		return;	}		NetReadUsercmds( clientNum, msg );}

int CALLBACK WinMain( HINSTANCE /*hInstance*/, HINSTANCE /*hPrevInstance*/, LPSTR /*lpCmdLine*/, int /*nCmdShow*/ ){	#ifndef NDEBUG		int flag = _CrtSetDbgFlag( _CRTDBG_REPORT_FLAG ); /* Get current flag */		flag ^= _CRTDBG_LEAK_CHECK_DF; /* Turn on leak-checking bit */		_CrtSetDbgFlag( flag ); /* Set flag to the new value */	#endif    Game();	return 0;}

void ShowStatus(class CCommand* pCommand, tvector<tstring>& asTokens, const tstring& sCommand){	TMsg(tstring("Level: ") + CVar::GetCVarValue("game_level") + "/n");	TMsg(sprintf(tstring("Clients: %d Entities: %d/%d/n"), GameNetwork()->GetClientsConnected(), CBaseEntity::GetNumEntities(), GameServer()->GetMaxEntities()));	for (size_t i = 0; i < Game()->GetNumPlayers(); i++)	{		const CPlayer* pPlayer = Game()->GetPlayer(i);		if (!pPlayer)			continue;		if (pPlayer->GetClient() < 0)			TMsg("Local: ");		else			TMsg(sprintf(tstring("%d: "), pPlayer->GetClient()));		TMsg(pPlayer->GetPlayerName());		TMsg("/n");	}}

/*************************************************************************  初始化函数************************************************************************/void Controller::Init(const string& strID,const string& strPsd,bool bNetMode){	m_pCurrentSelectedMonster	= 0;								// 当前用鼠标右键选中的怪物	m_nCurrentChapter					= CHAPTER_0;				// 游戏剧情的章节	m_bLoopGame							= true;							// 游戏循环标志	m_bIsNetGame							= bNetMode;	SetMyPlayerInfo(strID,strPsd);	RPG_01::Game()->ChangeChapter(CHAPTER_1);	if (m_bIsNetGame)	{		Game()->GetNetworkModule()->Born();		Game()->GetNetworkModule()->RequestAllOnlinePlayer();	}}

int main(int argc, char* argv[]){    const char* rendererFlag = getCmdOption(argv, argv + argc, "--renderer");        auto game = Game();    if(game.Init(rendererFlag))    {        game.Loop();    }    game.Terminate();    return 0;}

int main(){	team A, B;	Game(A, B);	return 0;}

bool CUISpeechMenu::OnKeyboardAction(int dik, EUIMessages keyboard_action){    if (dik < DIK_1 || dik > DIK_0)		return CUIDialogWnd::OnKeyboardAction(dik, keyboard_action);	game_cl_mp* game = smart_cast<game_cl_mp*>(&Game());	HideDialog();	game->OnMessageSelected(this, static_cast<u8>(dik - DIK_1));	return true;}

void CChangeLevelWnd::OnOk(){	Game().StartStopMenu					(this, true);	NET_Packet								p;	p.w_begin								(M_CHANGE_LEVEL);	p.w										(&m_game_vertex_id,sizeof(m_game_vertex_id));	p.w										(&m_level_vertex_id,sizeof(m_level_vertex_id));	p.w_vec3								(m_position);	p.w_vec3								(m_angles);	Level().Send							(p,net_flags(TRUE));}

void CSpectator::IR_OnKeyboardHold(int cmd){	if (Remote())		return;	game_cl_mp* pMPGame = smart_cast<game_cl_mp*> (&Game());	game_PlayerState* PS = Game().local_player;	if ((cam_active==eacFreeFly)||(cam_active==eacFreeLook)){		CCameraBase* C	= cameras	[cam_active];		Fvector vmove={0,0,0};		switch(cmd){		case kUP:		case kDOWN: 		case kCAM_ZOOM_IN: 		case kCAM_ZOOM_OUT: 			cameras[cam_active]->Move(cmd); break;		case kLEFT:		case kRIGHT:			if (eacFreeLook!=cam_active) cameras[cam_active]->Move(cmd); break;		case kFWD:						vmove.mad( C->vDirection, Device.fTimeDelta*Accel_mul );			break;		case kBACK:			vmove.mad( C->vDirection, -Device.fTimeDelta*Accel_mul );			break;		case kR_STRAFE:{			Fvector right;			right.crossproduct(C->vNormal,C->vDirection);			vmove.mad( right, Device.fTimeDelta*Accel_mul );			}break;		case kL_STRAFE:{			Fvector right;			right.crossproduct(C->vNormal,C->vDirection);			vmove.mad( right, -Device.fTimeDelta*Accel_mul );			}break;		}		if (cam_active != eacFreeFly || (pMPGame->Is_Spectator_Camera_Allowed(eacFreeFly) || (PS && PS->testFlag(GAME_PLAYER_FLAG_SPECTATOR))))			XFORM().c.add( vmove );	}}

void CUISkinSelectorWnd::SendMessage(CUIWindow *pWnd, s16 msg, void *pData){	game_cl_mp	*game = NULL;	//game_cl_Deathmatch * dm = NULL;	switch (msg){		case BUTTON_CLICKED:			game = smart_cast<game_cl_mp*>(&(Game()));			//dm = smart_cast<game_cl_Deathmatch *>(&(Game()));/*			if (pWnd == m_pButtons[0])				OnKeyLeft();			else if (pWnd == m_pButtons[1])				OnKeyRight();			else */if (pWnd == m_pBtnAutoSelect)			{				m_iActiveIndex = -1;				OnBtnOK();					}			else if (pWnd == m_pBtnSpectator)			{				HideDialog();				game->OnSpectatorSelect();			}			else if (pWnd == m_pBtnBack)			{				HideDialog();				game->OnSkinMenuBack();							}			else                for (int i = 0; i<6; i++)					if (pWnd == m_pImage[i])					{						m_iActiveIndex = m_firstSkin+i;						OnBtnOK();										}			break;		case WINDOW_FOCUS_RECEIVED:/*			if (pWnd == m_pButtons[0])			{				m_pAnims[0]->Rewind(0);				m_pAnims[0]->Play();			}			else if (pWnd == m_pButtons[1])			{				m_pAnims[1]->Rewind(0);				m_pAnims[1]->Play();			}*/						break;	}}

void CUITextVote::OnBtnOk(){	LPCSTR name = edit->GetText();	if (name && name[0])	{		string512 command;		sprintf(command, "cl_votestart $%s", name);				Console->Execute(command);		game_cl_mp* game = smart_cast<game_cl_mp*>(&Game());		game->StartStopMenu(this, true);	}	else		return;}

void CUISpawnWnd::SendMessage(CUIWindow *pWnd, s16 msg, void *pData){	if (BUTTON_CLICKED == msg)	{		Game().StartStopMenu(this,true);		game_cl_mp * game = smart_cast<game_cl_mp*>(&Game());		VERIFY(game);		//game_cl_TeamDeathmatch * tdm = smart_cast<game_cl_TeamDeathmatch *>(&(Game()));		if (pWnd == m_pImage1)			game->OnTeamSelect(0);		else if (pWnd == m_pImage2)			game->OnTeamSelect(1);		else if (pWnd == m_pBtnAutoSelect)			game->OnTeamSelect(-1);		else if (pWnd == m_pBtnSpectator)			game->OnSpectatorSelect();		else if (pWnd == m_pBtnBack)			game->OnTeamMenuBack();	}	inherited::SendMessage(pWnd, msg, pData);}

void CUITalkWnd::Update(){	//остановить разговор, если нужно	if (g_actor && m_pActor && !m_pActor->IsTalking() )	{		Game().StartStopMenu(this,true);	}else{		CGameObject* pOurGO = smart_cast<CGameObject*>(m_pOurInvOwner);		CGameObject* pOtherGO = smart_cast<CGameObject*>(m_pOthersInvOwner);			if(NULL==pOurGO || NULL==pOtherGO || ((pOurGO->Position().distance_to(pOtherGO->Position())>3.0f)&&!m_pOthersInvOwner->NeedOsoznanieMode()) )			Game().StartStopMenu(this,true);	}	if(m_bNeedToUpdateQuestions)	{		UpdateQuestions			();	}	inherited::Update			();	UpdateCameraDirection		(smart_cast<CGameObject*>(m_pOthersInvOwner));}

void CUIGameCTA::SetPlayerParamsToBuyMenu(){    VERIFY(m_pCurBuyMenu);    game_PlayerState* ps = Game().local_player;    VERIFY2(ps, "local player not initialized");    CActor* actor = smart_cast<CActor*> (Level().Objects.net_Find(ps->GameID));    R_ASSERT2(actor || ps->testFlag(GAME_PLAYER_FLAG_VERY_VERY_DEAD),              make_string("bad actor: not found in game (GameID = %d)", ps->GameID).c_str());    m_pCurBuyMenu->SetRank(ps->rank);    m_pCurBuyMenu->SetMoneyAmount(ps->money_for_round);}

void game_state_accumulator::init_player(game_PlayerState* local_player){	m_local_player					= local_player;	init_player_accum_values		(local_player);	CUIMpTradeWnd* tmp_trade_wnd	= NULL;	game_cl_Deathmatch* tmp_dm_game = smart_cast<game_cl_Deathmatch*>(&Game());	if (tmp_dm_game)	{		tmp_trade_wnd = smart_cast<CUIMpTradeWnd*>(tmp_dm_game->GetBuyWnd());	} else	{		R_ASSERT(Game().Type() == eGameIDCaptureTheArtefact);		CUIGameCTA* tmp_cta_ui	= smart_cast<CUIGameCTA*>(CurrentGameUI());		VERIFY(tmp_cta_ui);		tmp_trade_wnd			= smart_cast<CUIMpTradeWnd*>(tmp_cta_ui->GetBuyWnd());	}	R_ASSERT(tmp_trade_wnd);	m_item_mngr					= tmp_trade_wnd->GetItemMngr();	R_ASSERT(m_item_mngr);	m_amm_groups.init			(m_item_mngr);}

void ActorPlayer::setWeapon(int weaponId){	this->currentWeaponId = weaponId;	// Construct the weapon model instance	if(!model)	{		setModel("player_weapon");	}	model->GetTransform().Translation() = glm::vec3(0, -0.3, -1.95);	// Based on which weapon it is, select a reticle	if(weaponId == 0)	{		Game()->GetHUD()->SetReticle("hud/reticle_sniper.png", glm::vec2(48, 48));	} else	{		Game()->GetHUD()->SetReticle("hud/reticle.png", glm::vec2(48, 48));	}	//Save weapon	this->currentWeapon = weapons[weaponId];}

/*************************************************************************  玩家经验值改变************************************************************************/bool Controller::CheckPlayerIsInPortal(){	Player* myPlayer = GetMyPlayer();//GetPlayerManager()->GetPlayer(m_strMyPlayerID);	Point playerPosition = myPlayer->getPosition();	if (GetCurrentChapter() != CHAPTER_4 && Game()->GetPathManager()->IsInRect(Game()->GetSkillManager()->GetPortalAnimation()->GetScope(),playerPosition))	{		if (GetCurrentChapter() == CHAPTER_1)		{			ChangeChapter(CHAPTER_2);		}		else if (GetCurrentChapter() == CHAPTER_2)		{			ChangeChapter(CHAPTER_3);		}		else if (GetCurrentChapter() == CHAPTER_3)		{			ChangeChapter(CHAPTER_4);		}		return true;	}	return false;}