Add HL2MP bot possession mechanics and AFK handling

Author: Blixibon

src/game/client/clientmode_shared.cpp

@@ -399,6 +399,10 @@ void ClientModeShared::Init()
 	ListenForGameEvent( "game_newmap" );
 #endif
 
+#ifdef MAPBASE_MP
+	ListenForGameEvent( "player_afk" );
+#endif
+
 #ifndef _XBOX
 	HLTVCamera()->Init();
 #if defined( REPLAY_ENABLED )
@@ -1632,6 +1636,36 @@ void ClientModeShared::FireGameEvent( IGameEvent *event )
 		CReplayMessagePanel::RemoveAll();
 	}
 #endif
+#ifdef MAPBASE_MP
+	else if ( V_strcmp( "player_afk", eventname ) == 0 )
+	{
+		if ( !hudChat )
+			return;
+
+		int iPlayerIndex = engine->GetPlayerForUserID( event->GetInt( "userid" ) );
+		C_BasePlayer *pPlayer = UTIL_PlayerByIndex( iPlayerIndex );
+		if ( pPlayer )
+		{
+			const char *pszPlayerName = pPlayer->GetPlayerName();
+			if (PlayerNameNotSetYet( pszPlayerName ))
+				return;
+
+			CSteamID steamID;
+			pPlayer->GetSteamID( &steamID );
+
+			wchar_t wszPlayerName[MAX_PLAYER_NAME_LENGTH];
+			UTIL_GetFilteredPlayerNameAsWChar( steamID, pszPlayerName, wszPlayerName );
+
+			wchar_t wszLocalized[100];
+			g_pVGuiLocalize->ConstructString_safe( wszLocalized, g_pVGuiLocalize->Find( "#game_idle_spectator" ), 1, wszPlayerName );
+
+			char szLocalized[100];
+			g_pVGuiLocalize->ConvertUnicodeToANSI( wszLocalized, szLocalized, sizeof( szLocalized ) );
+
+			hudChat->Printf( CHAT_FILTER_TEAMCHANGE, "%s", szLocalized );
+		}
+	}
+#endif
 
 	else
 	{

src/game/client/hl2mp/clientmode_hl2mpnormal.cpp

@@ -18,6 +18,10 @@
 #include "hl2mpclientscoreboard.h"
 #include "hl2mptextwindow.h"
 #include "ienginevgui.h"
+#ifdef MAPBASE
+#include "hl2mp_gamerules.h"
+#include "usermessages.h"
+#endif
 
 // memdbgon must be the last include file in a .cpp file!!!
 #include "tier0/memdbgon.h"
@@ -109,6 +113,18 @@ ClientModeHL2MPNormal::~ClientModeHL2MPNormal()
 }
 
 
+#ifdef MAPBASE
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+int g_nNumHideBots = 0;
+static void __MsgFunc_HideBotsJoin( bf_read &msg )
+{
+	g_nNumHideBots = msg.ReadChar();
+}
+#endif
+
+
 //-----------------------------------------------------------------------------
 // Purpose: 
 //-----------------------------------------------------------------------------
@@ -122,6 +138,46 @@ void ClientModeHL2MPNormal::Init()
 	{
 		Warning( "Couldn't load combine panel scheme!\n" );
 	}
+
+#ifdef MAPBASE
+	usermessages->HookMessage( "HideBotsJoin", __MsgFunc_HideBotsJoin );
+#endif
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void ClientModeHL2MPNormal::FireGameEvent( IGameEvent *event )
+{
+	const char *eventname = event->GetName();
+
+	if (!eventname || !eventname[0])
+		return;
+
+#ifdef MAPBASE
+	if ( FStrEq( "player_connect_client", eventname ) || FStrEq( "player_disconnect", eventname ) )
+	{
+		if ( event->GetInt( "bot" ) != 0 )
+		{
+			if (g_nNumHideBots > 0)
+			{
+				g_nNumHideBots--;
+				return;
+			}
+		}
+	}
+	else if ( FStrEq( "player_team", eventname ) )
+	{
+		// Don't show player team messages during this
+		if (g_nNumHideBots > 0)
+		{
+			return;
+		}
+	}
+#endif
+
+	BaseClass::FireGameEvent( event );
 }
 
 

src/game/client/hl2mp/clientmode_hl2mpnormal.h

@@ -32,6 +32,8 @@ class ClientModeHL2MPNormal : public ClientModeShared
 
 	virtual void	Init();
 	virtual int		GetDeathMessageStartHeight( void );
+
+	virtual void	FireGameEvent( IGameEvent *event );
 };
 
 extern IClientMode *GetClientModeNormal();

src/game/server/hl2mp/bot/hl2mp_bot.cpp

@@ -668,6 +668,10 @@ void CHL2MPBot::Spawn()
 	SetBrokenFormation( false );
 
 	GetVisionInterface()->ForgetAllKnownEntities();
+
+#ifdef MAPBASE
+	SetUse( &CHL2MPBot::BotUse );
+#endif
 }
 
 
@@ -847,6 +851,45 @@ void CHL2MPBot::Event_Killed( const CTakeDamageInfo &info )
 }
 
 
+#ifdef MAPBASE
+//-----------------------------------------------------------------------------------------------------
+int CHL2MPBot::ObjectCaps( void )
+{
+	int nCaps = BaseClass::ObjectCaps();
+
+	if ( ( HasAttribute( CHL2MPBot::CAN_POSSESS ) || HasAttribute( CHL2MPBot::IS_NPC ) ) && IsAlive() )
+		nCaps |= FCAP_IMPULSE_USE;
+
+	return nCaps;
+}
+
+//-----------------------------------------------------------------------------------------------------
+void CHL2MPBot::BotUse( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE useType, float value )
+{
+	if ( HasAttribute( CHL2MPBot::CAN_POSSESS ) )
+	{
+		CHL2MP_Player *pPlayer = ToHL2MPPlayer( pActivator );
+		if ( pPlayer )
+		{
+			CRecipientFilter user;
+			user.AddAllPlayers();
+			user.MakeReliable();
+
+			// Make sure these bots come and go seamlessly
+			UserMessageBegin( user, "HideBotsJoin" );
+				WRITE_CHAR( 2 );
+			MessageEnd();
+
+			if (TheHL2MPBots().BotTakeOverPlayer( pPlayer, false ))
+			{
+				TheHL2MPBots().PlayerTakeOverBot( pPlayer, this );
+			}
+		}
+	}
+}
+#endif
+
+
 //---------------------------------------------------------------------------------------------
 class CCollectReachableObjects : public ISearchSurroundingAreasFunctor
 {

src/game/server/hl2mp/bot/hl2mp_bot.h

@@ -75,6 +75,11 @@ class CHL2MPBot: public NextBotPlayer< CHL2MP_Player >, public CGameEventListene
 
 	virtual CNavArea *GetLastKnownArea( void ) const		{ return static_cast< CNavArea * >( BaseClass::GetLastKnownArea() ); }		// return the last nav area the player occupied - NULL if unknown
 
+#ifdef MAPBASE
+	virtual int			ObjectCaps( void );
+	virtual void		BotUse( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE useType, float value );
+#endif
+
 	// NextBotPlayer
 	static CBasePlayer *AllocatePlayerEntity( edict_t *pEdict, const char *playerName );
 
@@ -192,6 +197,9 @@ class CHL2MPBot: public NextBotPlayer< CHL2MP_Player >, public CGameEventListene
 		ALWAYS_FIRE_WEAPON			= 1<<13,				// constantly fire our weapon
 		TELEPORT_TO_HINT			= 1<<14,				// bot will teleport to hint target instead of walking out from the spawn point
 		AUTO_JUMP					= 1<<18,				// auto jump
+#ifdef MAPBASE
+		CAN_POSSESS					= 1<<19,				// player can switch to this bot
+#endif
 	};
 	void SetAttribute( int attributeFlag );
 	void ClearAttribute( int attributeFlag );