truelight@2395: /* $Id$ */
truelight@2395: 
truelight@9360: /** @file ai.cpp handles the communication between the AI layer and the OpenTTD core */
truelight@9360: 
truelight@9360: #include "../../stdafx.h"
truelight@9360: #include "../../openttd.h"
truelight@9360: #include "../../variables.h"
truelight@9360: #include "../../command.h"
truelight@9360: #include "../../network/network.h"
truelight@9360: #include "../../helpers.hpp"
truelight@9390: #include "../../debug.h"
truelight@2395: #include "ai.h"
truelight@9360: #include "ai_base.hpp"
truelight@9390: #include "ai_controller.hpp"
truelight@9390: #include "ai_factory.hpp"
truelight@9360: 
truelight@9361: static AIController *_ai_player[MAX_PLAYERS];
truelight@9360: static uint _ai_frame_counter;
truelight@9360: static bool _ai_enabled;
truelight@2715: 
truelight@2395: /**
truelight@2395:  * Run 1 tick of the AI. Don't overdo it, keep it realistic.
truelight@2395:  */
tron@2551: static void AI_RunTick(PlayerID player)
truelight@2395: {
truelight@2395: 	_current_player = player;
truelight@2395: 
truelight@9390: 	/* If this is NULL, it means we couldn't find an AI for this player */
truelight@9390: 	if (_ai_player[player] == NULL) return;
truelight@9390: 
truelight@9361: 	_ai_player[player]->IncreaseTick();
truelight@9361: 	_ai_player[player]->GameLoop();
truelight@2395: }
truelight@2395: 
truelight@2395: 
truelight@2395: /**
truelight@2395:  * The gameloop for AIs.
truelight@2395:  *  Handles one tick for all the AIs.
truelight@2395:  */
rubidium@6573: void AI_RunGameLoop()
truelight@2395: {
truelight@2395: 	/* Don't do anything if ai is disabled */
truelight@9360: 	if (!_ai_enabled) return;
truelight@2395: 
Darkvater@5332: 	/* Don't do anything if we are a network-client, or the AI has been disabled */
Darkvater@5332: 	if (_networking && (!_network_server || !_patches.ai_in_multiplayer)) return;
truelight@2682: 
truelight@2395: 	/* New tick */
truelight@9360: 	_ai_frame_counter++;
truelight@2395: 
truelight@2395: 	/* Make sure the AI follows the difficulty rule.. */
tron@2446: 	assert(_opt.diff.competitor_speed <= 4);
truelight@9360: 	if ((_ai_frame_counter & ((1 << (4 - _opt.diff.competitor_speed)) - 1)) != 0) return;
truelight@2395: 
truelight@2395: 	/* Check for AI-client (so joining a network with an AI) */
Darkvater@4854: 	if (!_networking || _network_server) {
truelight@2395: 		/* Check if we want to run AIs (server or SP only) */
tron@4000: 		const Player* p;
truelight@2395: 
truelight@2395: 		FOR_ALL_PLAYERS(p) {
tron@2767: 			if (p->is_active && p->is_ai) {
truelight@2395: 				/* Run the script */
truelight@2395: 				AI_RunTick(p->index);
truelight@2395: 			}
truelight@2395: 		}
truelight@2395: 	}
truelight@2395: 
truelight@2395: 	_current_player = OWNER_NONE;
truelight@2395: }
truelight@2395: 
truelight@2395: /**
truelight@2395:  * A new AI sees the day of light. You can do here what ever you think is needed.
truelight@2395:  */
tron@2551: void AI_StartNewAI(PlayerID player)
truelight@2395: {
Darkvater@4850: 	assert(IsValidPlayer(player));
truelight@9360: 	if (!_ai_enabled) return;
truelight@9360: 	if (_networking && !_network_server) return;
truelight@2702: 
truelight@9390: 	_ai_player[player] = AIFactoryBase::SelectRandomAI();
truelight@9390: 	if (_ai_player[player] == NULL) {
truelight@9390: 		DEBUG(ai, 0, "Couldn't find a suitable AI to start for company '%d'", player);
truelight@9390: 		/* XXX -- We have no clean way to handle this yet! */
rubidium@9383: 	}
truelight@2395: }
truelight@2395: 
truelight@2395: /**
truelight@2395:  * This AI player died. Give it some chance to make a final puf.
truelight@2395:  */
tron@2551: void AI_PlayerDied(PlayerID player)
truelight@2395: {
truelight@9360: 	if (!_ai_enabled) return;
truelight@9360: 
truelight@2395: 	/* Called if this AI died */
truelight@9361: 	delete _ai_player[player];
truelight@2395: }
truelight@2395: 
truelight@2395: /**
truelight@2395:  * Initialize some AI-related stuff.
truelight@2395:  */
rubidium@6573: void AI_Initialize()
truelight@2395: {
truelight@2706: 	/* First, make sure all AIs are DEAD! */
truelight@2706: 	AI_Uninitialize();
truelight@2706: 
tron@2767: 	memset(&_ai_player, 0, sizeof(_ai_player));
truelight@9360: 	_ai_frame_counter = 0;
truelight@9360: 	_ai_enabled = true;
truelight@9400: 
truelight@9400: 	AIFactoryBase::RunInitializers();
truelight@2395: }
truelight@2395: 
truelight@2395: /**
truelight@2395:  * Deinitializer for AI-related stuff.
truelight@2395:  */
rubidium@6573: void AI_Uninitialize()
truelight@2395: {
tron@4000: 	const Player* p;
truelight@2395: 
truelight@2395: 	FOR_ALL_PLAYERS(p) {
tron@2767: 		if (p->is_active && p->is_ai) AI_PlayerDied(p->index);
truelight@2395: 	}
truelight@2395: }
truelight@9360: 
truelight@9360: /**
truelight@9360:  * Is it allowed to start a new AI.
truelight@9360:  * This function checks some boundries to see if we should launch a new AI.
truelight@9360:  * @return True if we can start a new AI.
truelight@9360:  */
truelight@9360: bool AI_AllowNewAI()
truelight@9360: {
truelight@9360: 	/* If disabled, no AI */
truelight@9360: 	if (!_ai_enabled) return false;
truelight@9360: 
truelight@9360: 	/* If in network, but no server, no AI */
truelight@9360: 	if (_networking && !_network_server) return false;
truelight@9360: 
truelight@9360: 	/* If in network, and server, possible AI */
truelight@9360: 	if (_networking && _network_server) {
truelight@9360: 		/* Do we want AIs in multiplayer? */
truelight@9360: 		if (!_patches.ai_in_multiplayer) return false;
truelight@9360: 	}
truelight@9360: 
truelight@9360: 	return true;
truelight@9360: }