Darkvater@2423: /* $Id$ */
truelight@2381: 
truelight@2381: #include "../../stdafx.h"
truelight@2381: #include "../../openttd.h"
tron@3964: #include "../../aircraft.h"
tron@3196: #include "../../bridge_map.h"
truelight@2381: #include "../../functions.h"
truelight@2381: #include "../../map.h"
tron@3185: #include "../../rail_map.h"
tron@3144: #include "../../road_map.h"
tron@3964: #include "../../roadveh.h"
tron@3315: #include "../../station_map.h"
truelight@2381: #include "../../tile.h"
truelight@2381: #include "../../player.h"
tron@3184: #include "../../tunnel_map.h"
truelight@2381: #include "../../vehicle.h"
truelight@2381: #include "../../engine.h"
truelight@2381: #include "../../command.h"
truelight@2381: #include "../../town.h"
truelight@2381: #include "../../industry.h"
truelight@2381: #include "../../station.h"
truelight@2381: #include "../../pathfind.h"
truelight@2381: #include "../../economy.h"
truelight@2381: #include "../../airport.h"
truelight@2381: #include "../../depot.h"
truelight@2381: #include "../../variables.h"
celestar@3359: #include "../../bridge.h"
tron@2447: #include "default.h"
truelight@2381: 
truelight@2381: // remove some day perhaps?
truelight@2381: static uint _ai_service_interval;
truelight@2381: 
truelight@2381: typedef void AiStateAction(Player *p);
truelight@2381: 
truelight@2381: enum {
truelight@2381: 	AIS_0 = 0,
truelight@2381: 	AIS_1 = 1,
truelight@2381: 	AIS_VEH_LOOP = 2,
truelight@2381: 	AIS_VEH_CHECK_REPLACE_VEHICLE = 3,
truelight@2381: 	AIS_VEH_DO_REPLACE_VEHICLE = 4,
truelight@2381: 	AIS_WANT_NEW_ROUTE = 5,
truelight@2381: 	AIS_BUILD_DEFAULT_RAIL_BLOCKS = 6,
truelight@2381: 	AIS_BUILD_RAIL = 7,
truelight@2381: 	AIS_BUILD_RAIL_VEH = 8,
truelight@2381: 	AIS_DELETE_RAIL_BLOCKS = 9,
truelight@2381: 	AIS_BUILD_DEFAULT_ROAD_BLOCKS = 10,
truelight@2381: 	AIS_BUILD_ROAD = 11,
truelight@2381: 	AIS_BUILD_ROAD_VEHICLES = 12,
truelight@2381: 	AIS_DELETE_ROAD_BLOCKS = 13,
truelight@2381: 	AIS_AIRPORT_STUFF = 14,
truelight@2381: 	AIS_BUILD_DEFAULT_AIRPORT_BLOCKS = 15,
truelight@2381: 	AIS_BUILD_AIRCRAFT_VEHICLES = 16,
truelight@2381: 	AIS_CHECK_SHIP_STUFF = 17,
truelight@2381: 	AIS_BUILD_DEFAULT_SHIP_BLOCKS = 18,
truelight@2381: 	AIS_DO_SHIP_STUFF = 19,
truelight@2381: 	AIS_SELL_VEHICLE = 20,
truelight@2381: 	AIS_REMOVE_STATION = 21,
truelight@2381: 	AIS_REMOVE_TRACK = 22,
truelight@2381: 	AIS_REMOVE_SINGLE_RAIL_TILE = 23
truelight@2381: };
truelight@2381: 
truelight@2381: 
truelight@2381: #include "../../table/ai_rail.h"
truelight@2381: 
tron@3033: static byte GetRailTrackStatus(TileIndex tile)
tron@3033: {
truelight@2381: 	uint32 r = GetTileTrackStatus(tile, TRANSPORT_RAIL);
truelight@2381: 	return (byte) (r | r >> 8);
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiCase0(Player *p)
truelight@2381: {
truelight@2381: 	p->ai.state = AIS_REMOVE_TRACK;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiCase1(Player *p)
truelight@2381: {
truelight@2381: 	p->ai.cur_veh = NULL;
truelight@2381: 	p->ai.state = AIS_VEH_LOOP;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateVehLoop(Player *p)
truelight@2381: {
truelight@2381: 	Vehicle *v;
truelight@2381: 	uint index;
truelight@2381: 
truelight@2381: 	index = (p->ai.cur_veh == NULL) ? 0 : p->ai.cur_veh->index + 1;
truelight@2381: 
truelight@2381: 	FOR_ALL_VEHICLES_FROM(v, index) {
tron@3033: 		if (v->type == 0 || v->owner != _current_player) continue;
tron@3033: 
tron@3033: 		if ((v->type == VEH_Train && v->subtype == 0) ||
truelight@2381: 				v->type == VEH_Road ||
truelight@2381: 				(v->type == VEH_Aircraft && v->subtype <= 2) ||
truelight@2381: 				v->type == VEH_Ship) {
truelight@2381: 			/* replace engine? */
truelight@2381: 			if (v->type == VEH_Train && v->engine_type < 3 &&
truelight@2381: 					(_price.build_railvehicle >> 3) < p->player_money) {
truelight@2381: 				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;
truelight@2381: 				p->ai.cur_veh = v;
truelight@2381: 				return;
truelight@2381: 			}
truelight@2381: 
truelight@2381: 			/* not profitable? */
truelight@2381: 			if (v->age >= 730 &&
tron@3033: 					v->profit_last_year < _price.station_value * 5 &&
tron@3033: 					v->profit_this_year < _price.station_value * 5) {
truelight@2381: 				p->ai.state_counter = 0;
truelight@2381: 				p->ai.state = AIS_SELL_VEHICLE;
truelight@2381: 				p->ai.cur_veh = v;
truelight@2381: 				return;
truelight@2381: 			}
truelight@2381: 
truelight@2381: 			/* not reliable? */
truelight@2381: 			if ((v->age != 0 &&
truelight@2381: 					GetEngine(v->engine_type)->reliability < 35389) ||
truelight@2381: 					v->age >= v->max_age) {
truelight@2381: 				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;
truelight@2381: 				p->ai.cur_veh = v;
truelight@2381: 				return;
truelight@2381: 			}
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_WANT_NEW_ROUTE;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: }
truelight@2381: 
celestar@3355: static EngineID AiChooseTrainToBuild(RailType railtype, int32 money, byte flag, TileIndex tile)
truelight@2381: {
tron@2544: 	EngineID best_veh_index = INVALID_ENGINE;
truelight@2381: 	byte best_veh_score = 0;
truelight@2381: 	int32 ret;
tron@2544: 	EngineID i;
truelight@2381: 
truelight@2381: 	for (i = 0; i < NUM_TRAIN_ENGINES; i++) {
truelight@2381: 		const RailVehicleInfo *rvi = RailVehInfo(i);
truelight@2381: 		const Engine* e = GetEngine(i);
truelight@2381: 
celestar@3355: 		if (!IsCompatibleRail(e->railtype, railtype) ||
tron@2529: 				rvi->flags & RVI_WAGON ||
tron@2529: 				(rvi->flags & RVI_MULTIHEAD && flag & 1) ||
tron@2529: 				!HASBIT(e->player_avail, _current_player) ||
tron@2529: 				e->reliability < 0x8A3D) {
truelight@2381: 			continue;
tron@2529: 		}
truelight@2381: 
tron@3491: 		ret = DoCommand(tile, i, 0, 0, CMD_BUILD_RAIL_VEHICLE);
tron@2529: 		if (!CmdFailed(ret) && ret <= money &&
peter1138@3022: 				rvi->ai_rank >= best_veh_score) {
peter1138@3022: 			best_veh_score = rvi->ai_rank;
truelight@2381: 			best_veh_index = i;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	return best_veh_index;
truelight@2381: }
truelight@2381: 
Darkvater@3344: static EngineID AiChooseRoadVehToBuild(CargoID cargo, int32 money, TileIndex tile)
truelight@2381: {
tron@2544: 	EngineID best_veh_index = INVALID_ENGINE;
truelight@2381: 	int32 best_veh_cost = 0;
truelight@2381: 	int32 ret;
truelight@2381: 
tron@2544: 	EngineID i = _cargoc.ai_roadveh_start[cargo];
tron@2544: 	EngineID end = i + _cargoc.ai_roadveh_count[cargo];
tron@3034: 
tron@3034: 	for (; i != end; i++) {
tron@3034: 		const Engine* e = GetEngine(i);
tron@3034: 
truelight@2381: 		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D)
truelight@2381: 			continue;
truelight@2381: 
tron@3491: 		ret = DoCommand(tile, i, 0, 0, CMD_BUILD_ROAD_VEH);
truelight@2381: 		if (!CmdFailed(ret) && ret <= money && ret >= best_veh_cost) {
truelight@2381: 			best_veh_cost = ret;
truelight@2381: 			best_veh_index = i;
truelight@2381: 		}
tron@3034: 	}
truelight@2381: 
truelight@2381: 	return best_veh_index;
truelight@2381: }
truelight@2381: 
tron@2544: static EngineID AiChooseAircraftToBuild(int32 money, byte flag)
truelight@2381: {
tron@2544: 	EngineID best_veh_index = INVALID_ENGINE;
truelight@2381: 	int32 best_veh_cost = 0;
truelight@2381: 	int32 ret;
truelight@2381: 
tron@2544: 	EngineID i = AIRCRAFT_ENGINES_INDEX;
tron@2544: 	EngineID end = i + NUM_AIRCRAFT_ENGINES;
tron@3034: 
tron@3034: 	for (; i != end; i++) {
tron@3034: 		const Engine* e = GetEngine(i);
tron@3034: 
truelight@2381: 		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D)
truelight@2381: 			continue;
truelight@2381: 
truelight@2381: 		if (flag&1) {
truelight@2381: 			if (i<253) continue;
truelight@2381: 		} else {
truelight@2381: 			if (i>=253) continue;
truelight@2381: 		}
truelight@2381: 
tron@3491: 		ret = DoCommand(0, i, 0, DC_QUERY_COST, CMD_BUILD_AIRCRAFT);
truelight@2381: 		if (!CmdFailed(ret) && ret <= money && ret >= best_veh_cost) {
truelight@2381: 			best_veh_cost = ret;
truelight@2381: 			best_veh_index = i;
truelight@2381: 		}
tron@3034: 	}
truelight@2381: 
truelight@2381: 	return best_veh_index;
truelight@2381: }
truelight@2381: 
truelight@2381: static int32 AiGetBasePrice(Player *p)
truelight@2381: {
truelight@2381: 	int32 base = _price.station_value;
truelight@2381: 
truelight@2381: 	// adjust base price when more expensive vehicles are available
tron@3033: 	switch (p->ai.railtype_to_use) {
tron@3966: 		default: NOT_REACHED();
tron@3966: 		case RAILTYPE_RAIL:     break;
tron@3966: 		case RAILTYPE_ELECTRIC: break;
tron@3966: 		case RAILTYPE_MONO:     base = (base * 3) >> 1; break;
tron@3966: 		case RAILTYPE_MAGLEV:   base *= 2; break;
tron@3033: 	}
truelight@2381: 
truelight@2381: 	return base;
truelight@2381: }
truelight@2381: 
truelight@2381: #if 0
tron@2544: static EngineID AiChooseShipToBuild(byte cargo, int32 money)
truelight@2381: {
truelight@2381: 	// XXX: not done
tron@2544: 	return INVALID_ENGINE;
truelight@2381: }
truelight@2381: #endif
truelight@2381: 
tron@2544: static EngineID AiChooseRoadVehToReplaceWith(Player* p, Vehicle* v)
truelight@2381: {
truelight@2381: 	int32 avail_money = p->player_money + v->value;
truelight@2381: 	return AiChooseRoadVehToBuild(v->cargo_type, avail_money, v->tile);
truelight@2381: }
truelight@2381: 
tron@2544: static EngineID AiChooseAircraftToReplaceWith(Player* p, Vehicle* v)
truelight@2381: {
truelight@2381: 	int32 avail_money = p->player_money + v->value;
truelight@2381: 	return AiChooseAircraftToBuild(avail_money, v->engine_type>=253?1:0);
truelight@2381: }
truelight@2381: 
tron@2544: static EngineID AiChooseTrainToReplaceWith(Player* p, Vehicle* v)
truelight@2381: {
truelight@2381: 	int32 avail_money = p->player_money + v->value;
truelight@2381: 	int num=0;
truelight@2381: 	Vehicle *u = v;
truelight@2381: 
truelight@2381: 	while (++num, u->next != NULL) {
truelight@2381: 		u = u->next;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// XXX: check if a wagon
truelight@2381: 	return AiChooseTrainToBuild(v->u.rail.railtype, avail_money, 0, v->tile);
truelight@2381: }
truelight@2381: 
tron@2544: static EngineID AiChooseShipToReplaceWith(Player* p, Vehicle* v)
truelight@2381: {
truelight@2381: 	error("!AiChooseShipToReplaceWith");
truelight@2381: 
truelight@2381: 	/* maybe useless, but avoids compiler warning this way */
tron@2544: 	return INVALID_ENGINE;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiHandleGotoDepot(Player *p, int cmd)
truelight@2381: {
truelight@2381: 	if (p->ai.cur_veh->current_order.type != OT_GOTO_DEPOT)
tron@3491: 		DoCommand(0, p->ai.cur_veh->index, 0, DC_EXEC, cmd);
truelight@2381: 
truelight@2381: 	if (++p->ai.state_counter <= 1387) {
truelight@2381: 		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	if (p->ai.cur_veh->current_order.type == OT_GOTO_DEPOT) {
truelight@2381: 		p->ai.cur_veh->current_order.type = OT_DUMMY;
truelight@2381: 		p->ai.cur_veh->current_order.flags = 0;
truelight@2381: 		InvalidateWindow(WC_VEHICLE_VIEW, p->ai.cur_veh->index);
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiRestoreVehicleOrders(Vehicle *v, BackuppedOrders *bak)
truelight@2381: {
tron@2639: 	uint i;
tron@2639: 
tron@2639: 	for (i = 0; bak->order[i].type != OT_NOTHING; i++) {
truelight@2381: 		if (CmdFailed(DoCommandP(0, v->index + (i << 16), PackOrder(&bak->order[i]), NULL, CMD_INSERT_ORDER | CMD_NO_TEST_IF_IN_NETWORK)))
truelight@2381: 			break;
tron@2639: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiHandleReplaceTrain(Player *p)
truelight@2381: {
truelight@2381: 	Vehicle *v = p->ai.cur_veh;
truelight@2381: 	BackuppedOrders orderbak[1];
tron@2544: 	EngineID veh;
truelight@2381: 
truelight@2381: 	// wait until the vehicle reaches the depot.
truelight@2381: 	if (!IsTileDepotType(v->tile, TRANSPORT_RAIL) || v->u.rail.track != 0x80 || !(v->vehstatus&VS_STOPPED)) {
truelight@2381: 		AiHandleGotoDepot(p, CMD_TRAIN_GOTO_DEPOT);
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	veh = AiChooseTrainToReplaceWith(p, v);
tron@2544: 	if (veh != INVALID_ENGINE) {
truelight@2381: 		TileIndex tile;
truelight@2381: 
truelight@2381: 		BackupVehicleOrders(v, orderbak);
truelight@2381: 		tile = v->tile;
truelight@2381: 
tron@3491: 		if (!CmdFailed(DoCommand(0, v->index, 2, DC_EXEC, CMD_SELL_RAIL_WAGON)) &&
tron@3491: 			  !CmdFailed(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE)) ) {
tron@3948: 			VehicleID veh = _new_vehicle_id;
truelight@2381: 			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);
tron@3491: 			DoCommand(0, veh, 0, DC_EXEC, CMD_START_STOP_TRAIN);
tron@3491: 
tron@3491: 			DoCommand(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiHandleReplaceRoadVeh(Player *p)
truelight@2381: {
truelight@2381: 	Vehicle *v = p->ai.cur_veh;
truelight@2381: 	BackuppedOrders orderbak[1];
tron@2544: 	EngineID veh;
truelight@2381: 
tron@3964: 	if (!IsRoadVehInDepotStopped(v)) {
truelight@2381: 		AiHandleGotoDepot(p, CMD_SEND_ROADVEH_TO_DEPOT);
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	veh = AiChooseRoadVehToReplaceWith(p, v);
tron@2544: 	if (veh != INVALID_ENGINE) {
truelight@2381: 		TileIndex tile;
truelight@2381: 
truelight@2381: 		BackupVehicleOrders(v, orderbak);
truelight@2381: 		tile = v->tile;
truelight@2381: 
tron@3491: 		if (!CmdFailed(DoCommand(0, v->index, 0, DC_EXEC, CMD_SELL_ROAD_VEH)) &&
tron@3491: 			  !CmdFailed(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_ROAD_VEH)) ) {
tron@3948: 			VehicleID veh = _new_vehicle_id;
truelight@2381: 			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);
tron@3491: 			DoCommand(0, veh, 0, DC_EXEC, CMD_START_STOP_ROADVEH);
tron@3491: 
tron@3491: 			DoCommand(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiHandleReplaceAircraft(Player *p)
truelight@2381: {
truelight@2381: 	Vehicle *v = p->ai.cur_veh;
truelight@2381: 	BackuppedOrders orderbak[1];
tron@2544: 	EngineID veh;
truelight@2381: 
tron@3964: 	if (!IsAircraftInHangarStopped(v)) {
truelight@2381: 		AiHandleGotoDepot(p, CMD_SEND_AIRCRAFT_TO_HANGAR);
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	veh = AiChooseAircraftToReplaceWith(p, v);
tron@2544: 	if (veh != INVALID_ENGINE) {
truelight@2381: 		TileIndex tile;
truelight@2381: 
truelight@2381: 		BackupVehicleOrders(v, orderbak);
truelight@2381: 		tile = v->tile;
truelight@2381: 
tron@3491: 		if (!CmdFailed(DoCommand(0, v->index, 0, DC_EXEC, CMD_SELL_AIRCRAFT)) &&
tron@3491: 			  !CmdFailed(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_AIRCRAFT)) ) {
tron@3948: 			VehicleID veh = _new_vehicle_id;
truelight@2381: 			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);
tron@3491: 			DoCommand(0, veh, 0, DC_EXEC, CMD_START_STOP_AIRCRAFT);
tron@3491: 
tron@3491: 			DoCommand(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiHandleReplaceShip(Player *p)
truelight@2381: {
truelight@2381: 	error("!AiHandleReplaceShip");
truelight@2381: }
truelight@2381: 
tron@2544: typedef EngineID CheckReplaceProc(Player* p, Vehicle* v);
truelight@2381: 
tron@3033: static CheckReplaceProc* const _veh_check_replace_proc[] = {
truelight@2381: 	AiChooseTrainToReplaceWith,
truelight@2381: 	AiChooseRoadVehToReplaceWith,
truelight@2381: 	AiChooseShipToReplaceWith,
truelight@2381: 	AiChooseAircraftToReplaceWith,
truelight@2381: };
truelight@2381: 
truelight@2381: typedef void DoReplaceProc(Player *p);
tron@3033: static DoReplaceProc* const _veh_do_replace_proc[] = {
truelight@2381: 	AiHandleReplaceTrain,
truelight@2381: 	AiHandleReplaceRoadVeh,
truelight@2381: 	AiHandleReplaceShip,
truelight@2381: 	AiHandleReplaceAircraft
truelight@2381: };
truelight@2381: 
truelight@2381: static void AiStateCheckReplaceVehicle(Player *p)
truelight@2381: {
truelight@2381: 	Vehicle *v = p->ai.cur_veh;
truelight@2381: 
tron@2544: 	if (v->type == 0 ||
tron@2544: 			v->owner != _current_player ||
tron@2544: 			v->type > VEH_Ship ||
tron@2544: 			_veh_check_replace_proc[v->type - VEH_Train](p, v) == INVALID_ENGINE) {
truelight@2381: 		p->ai.state = AIS_VEH_LOOP;
truelight@2381: 	} else {
truelight@2381: 		p->ai.state_counter = 0;
truelight@2381: 		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateDoReplaceVehicle(Player *p)
truelight@2381: {
tron@3033: 	const Vehicle* v = p->ai.cur_veh;
tron@3033: 
truelight@2381: 	p->ai.state = AIS_VEH_LOOP;
truelight@2381: 	// vehicle is not owned by the player anymore, something went very wrong.
tron@3033: 	if (v->type == 0 || v->owner != _current_player) return;
truelight@2381: 	_veh_do_replace_proc[v->type - VEH_Train](p);
truelight@2381: }
truelight@2381: 
truelight@2381: typedef struct FoundRoute {
truelight@2381: 	int distance;
Darkvater@3344: 	CargoID cargo;
truelight@2381: 	void *from;
truelight@2381: 	void *to;
truelight@2381: } FoundRoute;
truelight@2381: 
truelight@2381: static Town *AiFindRandomTown(void)
truelight@2381: {
truelight@2381: 	Town *t = GetTown(RandomRange(_total_towns));
truelight@2381: 	return (t->xy != 0) ? t : NULL;
truelight@2381: }
truelight@2381: 
truelight@2381: static Industry *AiFindRandomIndustry(void)
truelight@2381: {
truelight@2381: 	Industry *i = GetIndustry(RandomRange(_total_industries));
truelight@2381: 	return (i->xy != 0) ? i : NULL;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiFindSubsidyIndustryRoute(FoundRoute *fr)
truelight@2381: {
truelight@2381: 	uint i;
Darkvater@3344: 	CargoID cargo;
truelight@2381: 	Subsidy *s;
truelight@2381: 	Industry *from, *to_ind;
truelight@2381: 	Town *to_tow;
truelight@2381: 	TileIndex to_xy;
truelight@2381: 
truelight@2381: 	// initially error
truelight@2381: 	fr->distance = -1;
truelight@2381: 
truelight@2381: 	// Randomize subsidy index..
truelight@2381: 	i = RandomRange(lengthof(_subsidies) * 3);
tron@3033: 	if (i >= lengthof(_subsidies)) return;
truelight@2381: 
truelight@2381: 	s = &_subsidies[i];
truelight@2381: 
truelight@2381: 	// Don't want passengers or mail
truelight@2381: 	cargo = s->cargo_type;
Darkvater@3344: 	if (cargo == CT_INVALID || cargo == CT_PASSENGERS || cargo == CT_MAIL || s->age > 7)
truelight@2381: 		return;
truelight@2381: 	fr->cargo = cargo;
truelight@2381: 
truelight@2381: 	fr->from = from = GetIndustry(s->from);
truelight@2381: 
truelight@2381: 	if (cargo == CT_GOODS || cargo == CT_FOOD) {
truelight@2381: 		to_tow = GetTown(s->to);
truelight@2381: 		if (to_tow->population < (uint32)(cargo == CT_FOOD ? 200 : 900))
truelight@2381: 			return; // error
truelight@2381: 		fr->to = to_tow;
truelight@2381: 		to_xy = to_tow->xy;
truelight@2381: 	} else {
truelight@2381: 		to_ind = GetIndustry(s->to);
truelight@2381: 		fr->to = to_ind;
truelight@2381: 		to_xy = to_ind->xy;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	fr->distance = DistanceManhattan(from->xy, to_xy);
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiFindSubsidyPassengerRoute(FoundRoute *fr)
truelight@2381: {
truelight@2381: 	uint i;
truelight@2381: 	Subsidy *s;
truelight@2381: 	Town *from,*to;
truelight@2381: 
truelight@2381: 	// initially error
truelight@2381: 	fr->distance = -1;
truelight@2381: 
truelight@2381: 	// Randomize subsidy index..
truelight@2381: 	i = RandomRange(lengthof(_subsidies) * 3);
tron@3033: 	if (i >= lengthof(_subsidies)) return;
truelight@2381: 
truelight@2381: 	s = &_subsidies[i];
truelight@2381: 
truelight@2381: 	// Only want passengers
tron@3033: 	if (s->cargo_type != CT_PASSENGERS || s->age > 7) return;
truelight@2381: 	fr->cargo = s->cargo_type;
truelight@2381: 
truelight@2381: 	fr->from = from = GetTown(s->from);
truelight@2381: 	fr->to = to = GetTown(s->to);
truelight@2381: 
truelight@2381: 	// They must be big enough
tron@3033: 	if (from->population < 400 || to->population < 400) return;
truelight@2381: 
truelight@2381: 	fr->distance = DistanceManhattan(from->xy, to->xy);
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiFindRandomIndustryRoute(FoundRoute *fr)
truelight@2381: {
truelight@2381: 	Industry *i,*i2;
truelight@2381: 	Town *t;
truelight@2381: 	uint32 r;
Darkvater@3344: 	CargoID cargo;
truelight@2381: 
truelight@2381: 	// initially error
truelight@2381: 	fr->distance = -1;
truelight@2381: 
truelight@2381: 	r = Random();
truelight@2381: 
truelight@2381: 	// pick a source
truelight@2381: 	fr->from = i = AiFindRandomIndustry();
tron@3033: 	if (i == NULL) return;
truelight@2381: 
truelight@2381: 	// pick a random produced cargo
truelight@2381: 	cargo = i->produced_cargo[0];
Darkvater@3344: 	if (r & 1 && i->produced_cargo[1] != CT_INVALID) cargo = i->produced_cargo[1];
truelight@2381: 
truelight@2381: 	fr->cargo = cargo;
truelight@2381: 
truelight@2381: 	// don't allow passengers
tron@3033: 	if (cargo == 0xFF || cargo == CT_PASSENGERS) return;
truelight@2381: 
truelight@2381: 	if (cargo != CT_GOODS && cargo != CT_FOOD) {
truelight@2381: 		// pick a dest, and see if it can receive
truelight@2381: 		i2 = AiFindRandomIndustry();
truelight@2381: 		if (i2 == NULL || i == i2 || !(i2->accepts_cargo[0] == cargo || i2->accepts_cargo[1] == cargo || i2->accepts_cargo[2] == cargo))
truelight@2381: 			return;
truelight@2381: 
truelight@2381: 		fr->to = i2;
truelight@2381: 		fr->distance = DistanceManhattan(i->xy, i2->xy);
truelight@2381: 	} else {
truelight@2381: 		// pick a dest town, and see if it's big enough
truelight@2381: 		t = AiFindRandomTown();
truelight@2381: 		if (t == NULL || t->population < (uint32)(cargo == CT_FOOD ? 200 : 900))
truelight@2381: 			return;
truelight@2381: 
truelight@2381: 		fr->to = t;
truelight@2381: 		fr->distance = DistanceManhattan(i->xy, t->xy);
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiFindRandomPassengerRoute(FoundRoute *fr)
truelight@2381: {
tron@3033: 	Town* source;
tron@3033: 	Town* dest;
truelight@2381: 
truelight@2381: 	// initially error
truelight@2381: 	fr->distance = -1;
truelight@2381: 
truelight@2381: 	fr->from = source = AiFindRandomTown();
tron@3033: 	if (source == NULL || source->population < 400) return;
truelight@2381: 
truelight@2381: 	fr->to = dest = AiFindRandomTown();
tron@3033: 	if (dest == NULL || source == dest || dest->population < 400) return;
truelight@2381: 
truelight@2381: 	fr->distance = DistanceManhattan(source->xy, dest->xy);
truelight@2381: }
truelight@2381: 
truelight@2381: // Warn: depends on 'xy' being the first element in both Town and Industry
truelight@2381: #define GET_TOWN_OR_INDUSTRY_TILE(p) (((Town*)(p))->xy)
truelight@2381: 
truelight@2381: static bool AiCheckIfRouteIsGood(Player *p, FoundRoute *fr, byte bitmask)
truelight@2381: {
truelight@2381: 	TileIndex from_tile, to_tile;
truelight@2381: 	Station *st;
truelight@2381: 	int dist, cur;
truelight@2381: 	uint same_station = 0;
truelight@2381: 
truelight@2381: 	// Make sure distance to closest station is < 37 pixels.
truelight@2381: 	from_tile = GET_TOWN_OR_INDUSTRY_TILE(fr->from);
truelight@2381: 	to_tile = GET_TOWN_OR_INDUSTRY_TILE(fr->to);
truelight@2381: 
truelight@2381: 	dist = 0xFFFF;
truelight@2381: 	FOR_ALL_STATIONS(st) if (st->xy != 0 && st->owner == _current_player) {
truelight@2381: 		cur = DistanceMax(from_tile, st->xy);
truelight@2381: 		if (cur < dist) dist = cur;
truelight@2381: 		cur = DistanceMax(to_tile, st->xy);
truelight@2381: 		if (cur < dist) dist = cur;
tron@3033: 		if (to_tile == from_tile && st->xy == to_tile) same_station++;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// To prevent the AI from building ten busstations in the same town, do some calculations
truelight@2381: 	//  For each road or airport station, we want 350 of population!
tron@3033: 	if ((bitmask == 2 || bitmask == 4) &&
tron@3033: 			same_station > 2 &&
tron@3033: 			((Town*)(fr->from))->population < same_station * 350) {
truelight@2381: 		return false;
tron@3033: 	}
tron@3033: 
tron@3033: 	if (dist != 0xFFFF && dist > 37) return false;
tron@3033: 
tron@3033: 	if (p->ai.route_type_mask != 0 &&
tron@3033: 			!(p->ai.route_type_mask & bitmask) &&
tron@3033: 			!CHANCE16(1, 5)) {
truelight@2381: 		return false;
tron@3033: 	}
truelight@2381: 
truelight@2381: 	if (fr->cargo == CT_PASSENGERS || fr->cargo == CT_MAIL) {
truelight@2381: 		if (((Town*)fr->from)->pct_pass_transported > 0x99 ||
truelight@2381: 				((Town*)fr->to)->pct_pass_transported > 0x99)
truelight@2381: 			return false;
truelight@2381: 
truelight@2381: 		// Make sure it has a reasonably good rating
tron@3033: 		if (((Town*)fr->from)->ratings[_current_player] < -100 ||
truelight@2381: 				((Town*)fr->to)->ratings[_current_player] < -100)
truelight@2381: 			return false;
truelight@2381: 	} else {
tron@3033: 		const Industry* i = (const Industry*)fr->from;
truelight@2381: 
truelight@2381: 		if (i->pct_transported[fr->cargo != i->produced_cargo[0]] > 0x99 ||
truelight@2381: 				i->total_production[fr->cargo != i->produced_cargo[0]] == 0)
truelight@2381: 			return false;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	p->ai.route_type_mask |= bitmask;
truelight@2381: 	return true;
truelight@2381: }
truelight@2381: 
truelight@2381: static byte AiGetDirectionBetweenTiles(TileIndex a, TileIndex b)
truelight@2381: {
truelight@2381: 	byte i = (TileX(a) < TileX(b)) ? 1 : 0;
truelight@2381: 	if (TileY(a) >= TileY(b)) i ^= 3;
truelight@2381: 	return i;
truelight@2381: }
truelight@2381: 
truelight@2381: static TileIndex AiGetPctTileBetween(TileIndex a, TileIndex b, byte pct)
truelight@2381: {
truelight@2381: 	return TileXY(
truelight@2381: 		TileX(a) + ((TileX(b) - TileX(a)) * pct >> 8),
truelight@2381: 		TileY(a) + ((TileY(b) - TileY(a)) * pct >> 8)
truelight@2381: 	);
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantLongIndustryRoute(Player *p)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	FoundRoute fr;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// look for one from the subsidy list
truelight@2381: 		AiFindSubsidyIndustryRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 60, 90 + 1)) break;
truelight@2381: 
truelight@2381: 		// try a random one
truelight@2381: 		AiFindRandomIndustryRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 60, 90 + 1)) break;
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
tron@2639: 	if (!AiCheckIfRouteIsGood(p, &fr, 1)) return;
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@2381: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@2381: 
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 9;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.unk6 = 1;
truelight@2381: 	p->ai.src.unk7 = 0;
truelight@2381: 	p->ai.src.buildcmd_a = 0x24;
truelight@2381: 	p->ai.src.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.src.direction = AiGetDirectionBetweenTiles(
tron@2639: 		p->ai.src.spec_tile,
tron@2639: 		p->ai.dst.spec_tile
tron@2639: 	);
truelight@2381: 	p->ai.src.cargo = fr.cargo | 0x80;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 9;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.unk6 = 1;
truelight@2381: 	p->ai.dst.unk7 = 0;
truelight@2381: 	p->ai.dst.buildcmd_a = 0x34;
truelight@2381: 	p->ai.dst.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
tron@2639: 		p->ai.dst.spec_tile,
tron@2639: 		p->ai.src.spec_tile
tron@2639: 	);
truelight@2381: 	p->ai.dst.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill middle field 1
truelight@2381: 	p->ai.mid1.spec_tile = AiGetPctTileBetween(
tron@2639: 		p->ai.src.spec_tile,
tron@2639: 		p->ai.dst.spec_tile,
tron@2639: 		0x55
tron@2639: 	);
truelight@2381: 	p->ai.mid1.use_tile = 0;
truelight@2381: 	p->ai.mid1.rand_rng = 6;
truelight@2381: 	p->ai.mid1.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.mid1.unk6 = 2;
truelight@2381: 	p->ai.mid1.unk7 = 1;
truelight@2381: 	p->ai.mid1.buildcmd_a = 0x30;
truelight@2381: 	p->ai.mid1.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.mid1.direction = p->ai.src.direction;
truelight@2381: 	p->ai.mid1.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill middle field 2
truelight@2381: 	p->ai.mid2.spec_tile = AiGetPctTileBetween(
tron@2639: 		p->ai.src.spec_tile,
tron@2639: 		p->ai.dst.spec_tile,
tron@2639: 		0xAA
tron@2639: 	);
truelight@2381: 	p->ai.mid2.use_tile = 0;
truelight@2381: 	p->ai.mid2.rand_rng = 6;
truelight@2381: 	p->ai.mid2.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.mid2.unk6 = 2;
truelight@2381: 	p->ai.mid2.unk7 = 1;
truelight@2381: 	p->ai.mid2.buildcmd_a = 0xFF;
truelight@2381: 	p->ai.mid2.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.mid2.direction = p->ai.dst.direction;
truelight@2381: 	p->ai.mid2.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = fr.cargo;
truelight@2381: 	p->ai.num_wagons = 3;
truelight@2381: 	p->ai.build_kind = 2;
truelight@2381: 	p->ai.num_build_rec = 4;
truelight@2381: 	p->ai.num_loco_to_build = 2;
truelight@2381: 	p->ai.num_want_fullload = 2;
truelight@2381: 	p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
truelight@2381: 	p->ai.state_mode = -1;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantMediumIndustryRoute(Player *p)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	FoundRoute fr;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// look for one from the subsidy list
truelight@2381: 		AiFindSubsidyIndustryRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 40, 60 + 1)) break;
truelight@2381: 
truelight@2381: 		// try a random one
truelight@2381: 		AiFindRandomIndustryRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 40, 60 + 1)) break;
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
tron@2639: 	if (!AiCheckIfRouteIsGood(p, &fr, 1)) return;
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 9;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.unk6 = 1;
truelight@2381: 	p->ai.src.unk7 = 0;
truelight@2381: 	p->ai.src.buildcmd_a = 0x10;
truelight@2381: 	p->ai.src.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.src.direction = AiGetDirectionBetweenTiles(
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.to)
tron@3033: 	);
truelight@2381: 	p->ai.src.cargo = fr.cargo | 0x80;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 9;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.unk6 = 1;
truelight@2381: 	p->ai.dst.unk7 = 0;
truelight@2381: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@2381: 	p->ai.dst.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.from)
tron@3033: 	);
truelight@2381: 	p->ai.dst.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = fr.cargo;
truelight@2381: 	p->ai.num_wagons = 3;
truelight@2381: 	p->ai.build_kind = 1;
truelight@2381: 	p->ai.num_build_rec = 2;
truelight@2381: 	p->ai.num_loco_to_build = 1;
truelight@2381: 	p->ai.num_want_fullload = 1;
truelight@2381: 	p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
truelight@2381: 	p->ai.state_mode = -1;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantShortIndustryRoute(Player *p)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	FoundRoute fr;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// look for one from the subsidy list
truelight@2381: 		AiFindSubsidyIndustryRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
truelight@2381: 
truelight@2381: 		// try a random one
truelight@2381: 		AiFindRandomIndustryRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
tron@2639: 	if (!AiCheckIfRouteIsGood(p, &fr, 1)) return;
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 9;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.unk6 = 1;
truelight@2381: 	p->ai.src.unk7 = 0;
truelight@2381: 	p->ai.src.buildcmd_a = 0x10;
truelight@2381: 	p->ai.src.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.src.direction = AiGetDirectionBetweenTiles(
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.to)
tron@3033: 	);
truelight@2381: 	p->ai.src.cargo = fr.cargo | 0x80;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 9;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.unk6 = 1;
truelight@2381: 	p->ai.dst.unk7 = 0;
truelight@2381: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@2381: 	p->ai.dst.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.from)
tron@3033: 	);
truelight@2381: 	p->ai.dst.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = fr.cargo;
truelight@2381: 	p->ai.num_wagons = 2;
truelight@2381: 	p->ai.build_kind = 1;
truelight@2381: 	p->ai.num_build_rec = 2;
truelight@2381: 	p->ai.num_loco_to_build = 1;
truelight@2381: 	p->ai.num_want_fullload = 1;
truelight@2381: 	p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
truelight@2381: 	p->ai.state_mode = -1;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantMailRoute(Player *p)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	FoundRoute fr;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// look for one from the subsidy list
truelight@2381: 		AiFindSubsidyPassengerRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 60, 110 + 1)) break;
truelight@2381: 
truelight@2381: 		// try a random one
truelight@2381: 		AiFindRandomPassengerRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 60, 110 + 1)) break;
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	fr.cargo = CT_MAIL;
tron@2639: 	if (!AiCheckIfRouteIsGood(p, &fr, 1)) return;
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 7;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.unk6 = 1;
truelight@2381: 	p->ai.src.unk7 = 0;
truelight@2381: 	p->ai.src.buildcmd_a = 0x24;
truelight@2381: 	p->ai.src.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.src.direction = AiGetDirectionBetweenTiles(
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.to)
tron@3033: 	);
truelight@2381: 	p->ai.src.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 7;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.unk6 = 1;
truelight@2381: 	p->ai.dst.unk7 = 0;
truelight@2381: 	p->ai.dst.buildcmd_a = 0x34;
truelight@2381: 	p->ai.dst.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.from)
tron@3033: 	);
truelight@2381: 	p->ai.dst.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill middle field 1
truelight@2381: 	p->ai.mid1.spec_tile = AiGetPctTileBetween(
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
tron@3033: 		0x55
tron@3033: 	);
truelight@2381: 	p->ai.mid1.use_tile = 0;
truelight@2381: 	p->ai.mid1.rand_rng = 6;
truelight@2381: 	p->ai.mid1.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.mid1.unk6 = 2;
truelight@2381: 	p->ai.mid1.unk7 = 1;
truelight@2381: 	p->ai.mid1.buildcmd_a = 0x30;
truelight@2381: 	p->ai.mid1.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.mid1.direction = p->ai.src.direction;
truelight@2381: 	p->ai.mid1.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill middle field 2
truelight@2381: 	p->ai.mid2.spec_tile = AiGetPctTileBetween(
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
tron@3033: 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
tron@3033: 		0xAA
tron@3033: 	);
truelight@2381: 	p->ai.mid2.use_tile = 0;
truelight@2381: 	p->ai.mid2.rand_rng = 6;
truelight@2381: 	p->ai.mid2.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.mid2.unk6 = 2;
truelight@2381: 	p->ai.mid2.unk7 = 1;
truelight@2381: 	p->ai.mid2.buildcmd_a = 0xFF;
truelight@2381: 	p->ai.mid2.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.mid2.direction = p->ai.dst.direction;
truelight@2381: 	p->ai.mid2.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = fr.cargo;
truelight@2381: 	p->ai.num_wagons = 3;
truelight@2381: 	p->ai.build_kind = 2;
truelight@2381: 	p->ai.num_build_rec = 4;
truelight@2381: 	p->ai.num_loco_to_build = 2;
truelight@2381: 	p->ai.num_want_fullload = 0;
truelight@2381: 	p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
truelight@2381: 	p->ai.state_mode = -1;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantPassengerRoute(Player *p)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	FoundRoute fr;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// look for one from the subsidy list
truelight@2381: 		AiFindSubsidyPassengerRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 0, 55 + 1)) break;
truelight@2381: 
truelight@2381: 		// try a random one
truelight@2381: 		AiFindRandomPassengerRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 0, 55 + 1)) break;
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	fr.cargo = CT_PASSENGERS;
tron@2639: 	if (!AiCheckIfRouteIsGood(p, &fr, 1)) return;
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 7;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.unk6 = 1;
truelight@2381: 	p->ai.src.unk7 = 0;
truelight@2381: 	p->ai.src.buildcmd_a = 0x10;
truelight@2381: 	p->ai.src.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.src.direction = AiGetDirectionBetweenTiles(
tron@2639: 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
tron@2639: 		GET_TOWN_OR_INDUSTRY_TILE(fr.to)
tron@2639: 	);
truelight@2381: 	p->ai.src.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 7;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.unk6 = 1;
truelight@2381: 	p->ai.dst.unk7 = 0;
truelight@2381: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@2381: 	p->ai.dst.buildcmd_b = 0xFF;
truelight@2381: 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
tron@2639: 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
tron@2639: 		GET_TOWN_OR_INDUSTRY_TILE(fr.from)
tron@2639: 	);
truelight@2381: 	p->ai.dst.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = fr.cargo;
truelight@2381: 	p->ai.num_wagons = 2;
truelight@2381: 	p->ai.build_kind = 1;
truelight@2381: 	p->ai.num_build_rec = 2;
truelight@2381: 	p->ai.num_loco_to_build = 1;
truelight@2381: 	p->ai.num_want_fullload = 0;
truelight@2381: 	p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
truelight@2381: 	p->ai.state_mode = -1;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantTrainRoute(Player *p)
truelight@2381: {
tron@2635: 	uint16 r = GB(Random(), 0, 16);
tron@2635: 
truelight@2381: 	p->ai.railtype_to_use = GetBestRailtype(p);
truelight@2381: 
truelight@2381: 	if (r > 0xD000) {
truelight@2381: 		AiWantLongIndustryRoute(p);
truelight@2381: 	} else if (r > 0x6000) {
truelight@2381: 		AiWantMediumIndustryRoute(p);
truelight@2381: 	} else if (r > 0x1000) {
truelight@2381: 		AiWantShortIndustryRoute(p);
truelight@2381: 	} else if (r > 0x800) {
truelight@2381: 		AiWantPassengerRoute(p);
truelight@2381: 	} else {
truelight@2381: 		AiWantMailRoute(p);
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantLongRoadIndustryRoute(Player *p)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	FoundRoute fr;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// look for one from the subsidy list
truelight@2381: 		AiFindSubsidyIndustryRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 35, 55 + 1)) break;
truelight@2381: 
truelight@2381: 		// try a random one
truelight@2381: 		AiFindRandomIndustryRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 35, 55 + 1)) break;
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
tron@2639: 	if (!AiCheckIfRouteIsGood(p, &fr, 2)) return;
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 9;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.buildcmd_a = 1;
truelight@2381: 	p->ai.src.direction = 0;
truelight@2381: 	p->ai.src.cargo = fr.cargo | 0x80;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 9;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@2381: 	p->ai.dst.direction = 0;
truelight@2381: 	p->ai.dst.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = fr.cargo;
truelight@2381: 	p->ai.num_build_rec = 2;
truelight@2381: 	p->ai.num_loco_to_build = 5;
truelight@2381: 	p->ai.num_want_fullload = 5;
truelight@2381: 
truelight@2381: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
truelight@2381: 	p->ai.state_mode = -1;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantMediumRoadIndustryRoute(Player *p)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	FoundRoute fr;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// look for one from the subsidy list
truelight@2381: 		AiFindSubsidyIndustryRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
truelight@2381: 
truelight@2381: 		// try a random one
truelight@2381: 		AiFindRandomIndustryRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
tron@2639: 	if (!AiCheckIfRouteIsGood(p, &fr, 2)) return;
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 9;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.buildcmd_a = 1;
truelight@2381: 	p->ai.src.direction = 0;
truelight@2381: 	p->ai.src.cargo = fr.cargo | 0x80;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 9;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@2381: 	p->ai.dst.direction = 0;
truelight@2381: 	p->ai.dst.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = fr.cargo;
truelight@2381: 	p->ai.num_build_rec = 2;
truelight@2381: 	p->ai.num_loco_to_build = 3;
truelight@2381: 	p->ai.num_want_fullload = 3;
truelight@2381: 
truelight@2381: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
truelight@2381: 	p->ai.state_mode = -1;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantLongRoadPassengerRoute(Player *p)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	FoundRoute fr;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// look for one from the subsidy list
truelight@2381: 		AiFindSubsidyPassengerRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 55, 180 + 1)) break;
truelight@2381: 
truelight@2381: 		// try a random one
truelight@2381: 		AiFindRandomPassengerRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 55, 180 + 1)) break;
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	fr.cargo = CT_PASSENGERS;
truelight@2381: 
tron@2639: 	if (!AiCheckIfRouteIsGood(p, &fr, 2)) return;
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 10;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.buildcmd_a = 1;
truelight@2381: 	p->ai.src.direction = 0;
truelight@2381: 	p->ai.src.cargo = CT_PASSENGERS;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 10;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@2381: 	p->ai.dst.direction = 0;
truelight@2381: 	p->ai.dst.cargo = CT_PASSENGERS;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = CT_PASSENGERS;
truelight@2381: 	p->ai.num_build_rec = 2;
truelight@2381: 	p->ai.num_loco_to_build = 4;
truelight@2381: 	p->ai.num_want_fullload = 0;
truelight@2381: 
truelight@2381: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
truelight@2381: 	p->ai.state_mode = -1;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantPassengerRouteInsideTown(Player *p)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	FoundRoute fr;
truelight@2381: 	Town *t;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// Find a town big enough
truelight@2381: 		t = AiFindRandomTown();
tron@3033: 		if (t != NULL && t->population >= 700) break;
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	fr.cargo = CT_PASSENGERS;
truelight@2381: 	fr.from = fr.to = t;
truelight@2381: 
tron@2639: 	if (!AiCheckIfRouteIsGood(p, &fr, 2)) return;
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.src.spec_tile = t->xy;
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 10;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.buildcmd_a = 1;
truelight@2381: 	p->ai.src.direction = 0;
truelight@2381: 	p->ai.src.cargo = CT_PASSENGERS;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 	p->ai.dst.spec_tile = t->xy;
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 10;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@2381: 	p->ai.dst.direction = 0;
truelight@2381: 	p->ai.dst.cargo = CT_PASSENGERS;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = CT_PASSENGERS;
truelight@2381: 	p->ai.num_build_rec = 2;
truelight@2381: 	p->ai.num_loco_to_build = 2;
truelight@2381: 	p->ai.num_want_fullload = 0;
truelight@2381: 
truelight@2381: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
truelight@2381: 	p->ai.state_mode = -1;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantRoadRoute(Player *p)
truelight@2381: {
tron@2635: 	uint16 r = GB(Random(), 0, 16);
truelight@2381: 
truelight@2381: 	if (r > 0x4000) {
truelight@2381: 		AiWantLongRoadIndustryRoute(p);
truelight@2381: 	} else if (r > 0x2000) {
truelight@2381: 		AiWantMediumRoadIndustryRoute(p);
truelight@2381: 	} else if (r > 0x1000) {
truelight@2381: 		AiWantLongRoadPassengerRoute(p);
truelight@2381: 	} else {
truelight@2381: 		AiWantPassengerRouteInsideTown(p);
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantPassengerAircraftRoute(Player *p)
truelight@2381: {
truelight@2381: 	FoundRoute fr;
truelight@2381: 	int i;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// look for one from the subsidy list
truelight@2381: 		AiFindSubsidyPassengerRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 0, 95 + 1)) break;
truelight@2381: 
truelight@2381: 		// try a random one
truelight@2381: 		AiFindRandomPassengerRoute(&fr);
tron@3033: 		if (IS_INT_INSIDE(fr.distance, 0, 95 + 1)) break;
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	fr.cargo = CT_PASSENGERS;
tron@3033: 	if (!AiCheckIfRouteIsGood(p, &fr, 4)) return;
truelight@2381: 
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 12;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 12;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.cargo = fr.cargo;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = fr.cargo;
truelight@2381: 	p->ai.build_kind = 0;
truelight@2381: 	p->ai.num_build_rec = 2;
truelight@2381: 	p->ai.num_loco_to_build = 1;
truelight@2381: 	p->ai.num_want_fullload = 1;
truelight@2381: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_AIRPORT_STUFF;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantOilRigAircraftRoute(Player *p)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	FoundRoute fr;
truelight@2381: 	Town *t;
truelight@2381: 	Industry *in;
truelight@2381: 
truelight@2381: 	i = 60;
tron@2952: 	for (;;) {
truelight@2381: 		// Find a town
truelight@2381: 		t = AiFindRandomTown();
truelight@2381: 		if (t != NULL) {
truelight@2381: 			// Find a random oil rig industry
truelight@2381: 			in = GetIndustry(RandomRange(_total_industries));
truelight@2381: 			if (in != NULL && in->type == IT_OIL_RIG) {
truelight@2381: 				if (DistanceManhattan(t->xy, in->xy) < 60)
truelight@2381: 					break;
truelight@2381: 			}
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		// only test 60 times
tron@3033: 		if (--i == 0) return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	fr.cargo = CT_PASSENGERS;
truelight@2381: 	fr.from = fr.to = t;
truelight@2381: 
tron@3033: 	if (!AiCheckIfRouteIsGood(p, &fr, 4)) return;
truelight@2381: 
truelight@2381: 	// Fill the source field
truelight@2381: 	p->ai.src.spec_tile = t->xy;
truelight@2381: 	p->ai.src.use_tile = 0;
truelight@2381: 	p->ai.src.rand_rng = 12;
truelight@2381: 	p->ai.src.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.src.cargo = CT_PASSENGERS;
truelight@2381: 
truelight@2381: 	// Fill the dest field
truelight@2381: 	p->ai.dst.spec_tile = in->xy;
truelight@2381: 	p->ai.dst.use_tile = 0;
truelight@2381: 	p->ai.dst.rand_rng = 5;
truelight@2381: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@2381: 	p->ai.dst.cargo = CT_PASSENGERS;
truelight@2381: 
truelight@2381: 	// Fill common fields
truelight@2381: 	p->ai.cargo_type = CT_PASSENGERS;
truelight@2381: 	p->ai.build_kind = 1;
truelight@2381: 	p->ai.num_build_rec = 2;
truelight@2381: 	p->ai.num_loco_to_build = 1;
truelight@2381: 	p->ai.num_want_fullload = 0;
truelight@2381: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@2381: 	p->ai.order_list_blocks[0] = 0;
truelight@2381: 	p->ai.order_list_blocks[1] = 1;
truelight@2381: 	p->ai.order_list_blocks[2] = 255;
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_AIRPORT_STUFF;
truelight@2381: 	p->ai.timeout_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantAircraftRoute(Player *p)
truelight@2381: {
truelight@2381: 	uint16 r = (uint16)Random();
truelight@2381: 
truelight@2381: 	if (r >= 0x2AAA || _date < 0x3912) {
truelight@2381: 		AiWantPassengerAircraftRoute(p);
truelight@2381: 	} else {
truelight@2381: 		AiWantOilRigAircraftRoute(p);
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiWantShipRoute(Player *p)
truelight@2381: {
truelight@2381: 	// XXX
truelight@2381: //	error("AiWaitShipRoute");
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiStateWantNewRoute(Player *p)
truelight@2381: {
truelight@2381: 	uint16 r;
truelight@2381: 	int i;
truelight@2381: 
truelight@2381: 	if (p->player_money < AiGetBasePrice(p) * 500) {
truelight@2381: 		p->ai.state = AIS_0;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	i = 200;
tron@2952: 	for (;;) {
truelight@2381: 		r = (uint16)Random();
truelight@2381: 
tron@3033: 		if (_patches.ai_disable_veh_train &&
tron@3033: 				_patches.ai_disable_veh_roadveh &&
tron@3033: 				_patches.ai_disable_veh_aircraft &&
tron@3033: 				_patches.ai_disable_veh_ship) {
truelight@2381: 			return;
tron@3033: 		}
truelight@2381: 
truelight@2381: 		if (r < 0x7626) {
truelight@2381: 			if (_patches.ai_disable_veh_train) continue;
truelight@2381: 			AiWantTrainRoute(p);
truelight@2381: 		} else if (r < 0xC4EA) {
truelight@2381: 			if (_patches.ai_disable_veh_roadveh) continue;
truelight@2381: 			AiWantRoadRoute(p);
truelight@2381: 		} else if (r < 0xD89B) {
truelight@2381: 			if (_patches.ai_disable_veh_aircraft) continue;
truelight@2381: 			AiWantAircraftRoute(p);
truelight@2381: 		} else {
truelight@2381: 			if (_patches.ai_disable_veh_ship) continue;
truelight@2381: 			AiWantShipRoute(p);
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		// got a route?
tron@3033: 		if (p->ai.state != AIS_WANT_NEW_ROUTE) break;
truelight@2381: 
truelight@2381: 		// time out?
truelight@2381: 		if (--i == 0) {
truelight@2381: 			if (++p->ai.state_counter == 556) p->ai.state = AIS_0;
truelight@2381: 			break;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static bool AiCheckTrackResources(TileIndex tile, const AiDefaultBlockData *p, byte cargo)
truelight@2381: {
truelight@2381: 	uint values[NUM_CARGO];
truelight@2381: 	int rad;
truelight@2381: 
tron@2952: 	for (;p->mode != 4;p++) if (p->mode == 1) {
truelight@2381: 		TileIndex tile2 = TILE_ADD(tile, ToTileIndexDiff(p->tileoffs));
truelight@2381: 		uint w;
truelight@2381: 		uint h;
truelight@2381: 
truelight@2381: 		w = GB(p->attr, 1, 3);
truelight@2381: 		h = GB(p->attr, 4, 3);
truelight@2381: 		if (p->attr & 1) uintswap(w, h);
truelight@2381: 
truelight@2381: 
truelight@2381: 		if (_patches.modified_catchment) {
truelight@2381: 			rad = CA_TRAIN;
truelight@2381: 		} else {
truelight@2381: 			rad = 4;
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		if (cargo & 0x80) {
truelight@2381: 			GetProductionAroundTiles(values, tile2, w, h, rad);
truelight@2381: 			return values[cargo & 0x7F] != 0;
truelight@2381: 		} else {
truelight@2381: 			GetAcceptanceAroundTiles(values, tile2, w, h, rad);
truelight@2381: 			if (!(values[cargo] & ~7))
truelight@2381: 				return false;
truelight@2381: 			if (cargo != CT_MAIL)
truelight@2381: 				return true;
truelight@2381: 			return !!((values[cargo]>>1) & ~7);
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	return true;
truelight@2381: }
truelight@2381: 
tron@3965: static int32 AiDoBuildDefaultRailTrack(TileIndex tile, const AiDefaultBlockData* p, RailType railtype, byte flag)
truelight@2381: {
truelight@2381: 	int32 ret;
truelight@2381: 	int32 total_cost = 0;
truelight@2381: 	Town *t = NULL;
truelight@2381: 	int rating = 0;
truelight@2381: 	int i,j,k;
truelight@2381: 
tron@2952: 	for (;;) {
truelight@2381: 		// This will seldomly overflow for valid reasons. Mask it to be on the safe side.
truelight@2381: 		uint c = TILE_MASK(tile + ToTileIndexDiff(p->tileoffs));
truelight@2381: 
truelight@2381: 		_cleared_town = NULL;
truelight@2381: 
truelight@2381: 		if (p->mode < 2) {
truelight@2381: 			if (p->mode == 0) {
truelight@2381: 				// Depot
tron@3965: 				ret = DoCommand(c, railtype, p->attr, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_TRAIN_DEPOT);
truelight@2381: 			} else {
truelight@2381: 				// Station
tron@3965: 				ret = DoCommand(c, (p->attr&1) | (p->attr>>4)<<8 | (p->attr>>1&7)<<16, railtype, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_RAILROAD_STATION);
truelight@2381: 			}
truelight@2381: 
truelight@2381: 			if (CmdFailed(ret)) return CMD_ERROR;
truelight@2381: 			total_cost += ret;
truelight@2381: 
truelight@2381: clear_town_stuff:;
truelight@2381: 			if (_cleared_town != NULL) {
truelight@2381: 				if (t != NULL && t != _cleared_town)
truelight@2381: 					return CMD_ERROR;
truelight@2381: 				t = _cleared_town;
truelight@2381: 				rating += _cleared_town_rating;
truelight@2381: 			}
truelight@2381: 		} else if (p->mode == 2) {
truelight@2381: 			// Rail
tron@2639: 			if (IsTileType(c, MP_RAILWAY)) return CMD_ERROR;
truelight@2381: 
truelight@2381: 			j = p->attr;
truelight@2381: 			k = 0;
truelight@2381: 
truelight@2381: 			// Build the rail
tron@2639: 			for (i = 0; i != 6; i++, j >>= 1) {
truelight@2381: 				if (j&1) {
truelight@2381: 					k = i;
tron@3965: 					ret = DoCommand(c, railtype, i, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_SINGLE_RAIL);
truelight@2381: 					if (CmdFailed(ret)) return CMD_ERROR;
truelight@2381: 					total_cost += ret;
truelight@2381: 				}
truelight@2381: 			}
truelight@2381: 
truelight@2381: 			/* signals too? */
tron@3033: 			if (j & 3) {
celestar@3871: 				/* XXX - we need to check manually whether we can build a signal if DC_EXEC is
celestar@3871: 				   not set because the rail has not actually been built */
celestar@3871: 				if (!IsTileType(c, MP_RAILWAY)) return CMD_ERROR;
truelight@2381: 
truelight@2381: 				if (flag & DC_EXEC) {
truelight@2381: 					j = 4 - j;
truelight@2381: 					do {
tron@3491: 						ret = DoCommand(c, k, 0, flag, CMD_BUILD_SIGNALS);
truelight@2381: 					} while (--j);
truelight@2381: 				} else {
truelight@2381: 					ret = _price.build_signals;
truelight@2381: 				}
truelight@2381: 				if (CmdFailed(ret)) return CMD_ERROR;
truelight@2381: 				total_cost += ret;
truelight@2381: 			}
truelight@2381: 		} else if (p->mode == 3) {
truelight@2381: 			//Clear stuff and then build single rail.
tron@3644: 			if (GetTileSlope(c, NULL) != SLOPE_FLAT)
truelight@2381: 				return CMD_ERROR;
tron@3491: 			ret = DoCommand(c, 0, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_LANDSCAPE_CLEAR);
truelight@2381: 			if (CmdFailed(ret)) return CMD_ERROR;
truelight@2381: 			total_cost += ret + _price.build_rail;
truelight@2381: 
truelight@2381: 			if (flag & DC_EXEC) {
tron@3965: 				DoCommand(c, railtype, p->attr&1, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_SINGLE_RAIL);
truelight@2381: 			}
truelight@2381: 
truelight@2381: 			goto clear_town_stuff;
truelight@2381: 		} else {
truelight@2381: 			// Unk
truelight@2381: 			break;
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		p++;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	if (!(flag & DC_EXEC)) {
truelight@2381: 		if (t != NULL && rating > t->ratings[_current_player]) {
truelight@2381: 			return CMD_ERROR;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	return total_cost;
truelight@2381: }
truelight@2381: 
truelight@2381: // Returns rule and cost
tron@3965: static int AiBuildDefaultRailTrack(TileIndex tile, byte p0, byte p1, byte p2, byte p3, byte dir, byte cargo, RailType railtype, int32* cost)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	const AiDefaultRailBlock *p;
truelight@2381: 
tron@2639: 	for (i = 0; (p = _default_rail_track_data[i]) != NULL; i++) {
truelight@2381: 		if (p->p0 == p0 && p->p1 == p1 && p->p2 == p2 && p->p3 == p3 &&
tron@2639: 				(p->dir == 0xFF || p->dir == dir || ((p->dir - 1) & 3) == dir)) {
tron@3965: 			*cost = AiDoBuildDefaultRailTrack(tile, p->data, railtype, DC_NO_TOWN_RATING);
peter1138@2737: 			if (!CmdFailed(*cost) && AiCheckTrackResources(tile, p->data, cargo))
truelight@2381: 				return i;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	return -1;
truelight@2381: }
truelight@2381: 
truelight@2381: static const byte _terraform_up_flags[] = {
truelight@2381: 	14, 13, 12, 11,
truelight@2381: 	10, 9, 8, 7,
truelight@2381: 	6, 5, 4, 3,
truelight@2381: 	2, 1, 0, 1,
truelight@2381: 	2, 1, 4, 1,
truelight@2381: 	2, 1, 8, 1,
truelight@2381: 	2, 1, 4, 2,
truelight@2381: 	2, 1
truelight@2381: };
truelight@2381: 
truelight@2381: static const byte _terraform_down_flags[] = {
truelight@2381: 	1, 2, 3, 4,
truelight@2381: 	5, 6, 1, 8,
truelight@2381: 	9, 10, 8, 12,
truelight@2381: 	4, 2, 0, 0,
truelight@2381: 	1, 2, 3, 4,
truelight@2381: 	5, 6, 2, 8,
truelight@2381: 	9, 10, 1, 12,
truelight@2381: 	8, 4
truelight@2381: };
truelight@2381: 
truelight@2381: static void AiDoTerraformLand(TileIndex tile, int dir, int unk, int mode)
truelight@2381: {
tron@2544: 	PlayerID old_player;
truelight@2381: 	uint32 r;
tron@3644: 	Slope slope;
truelight@2381: 	uint h;
truelight@2381: 
truelight@2381: 	old_player = _current_player;
truelight@2381: 	_current_player = OWNER_NONE;
truelight@2381: 
truelight@2381: 	r = Random();
truelight@2381: 
truelight@2381: 	unk &= (int)r;
truelight@2381: 
truelight@2381: 	do {
truelight@2381: 		tile = TILE_MASK(tile + TileOffsByDir(dir));
truelight@2381: 
truelight@2381: 		r >>= 2;
tron@3033: 		if (r & 2) {
truelight@2381: 			dir++;
tron@3033: 			if (r & 1) dir -= 2;
truelight@2381: 		}
truelight@2381: 		dir &= 3;
truelight@2381: 	} while (--unk >= 0);
truelight@2381: 
truelight@2381: 	slope = GetTileSlope(tile, &h);
truelight@2381: 
tron@3644: 	if (slope != SLOPE_FLAT) {
tron@3033: 		if (mode > 0 || (mode == 0 && !(r & 0xC))) {
truelight@2381: 			// Terraform up
tron@3491: 			DoCommand(tile, _terraform_up_flags[slope - 1], 1,
truelight@2381: 				DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_TERRAFORM_LAND);
truelight@2381: 		} else if (h != 0) {
truelight@2381: 			// Terraform down
tron@3491: 			DoCommand(tile, _terraform_down_flags[slope - 1], 0,
truelight@2381: 				DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_TERRAFORM_LAND);
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	_current_player = old_player;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateBuildDefaultRailBlocks(Player *p)
truelight@2381: {
tron@2639: 	uint i;
tron@2639: 	int j;
truelight@2381: 	AiBuildRec *aib;
truelight@2381: 	int rule;
truelight@2381: 	int32 cost;
truelight@2381: 
truelight@2381: 	// time out?
truelight@2381: 	if (++p->ai.timeout_counter == 1388) {
truelight@2381: 		p->ai.state = AIS_DELETE_RAIL_BLOCKS;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// do the following 8 times
tron@2648: 	for (i = 0; i < 8; i++) {
truelight@2381: 		// check if we can build the default track
truelight@2381: 		aib = &p->ai.src;
truelight@2381: 		j = p->ai.num_build_rec;
truelight@2381: 		do {
truelight@2381: 			// this item has already been built?
tron@3033: 			if (aib->cur_building_rule != 255) continue;
truelight@2381: 
truelight@2381: 			// adjust the coordinate randomly,
truelight@2381: 			// to make sure that we find a position.
truelight@2381: 			aib->use_tile = AdjustTileCoordRandomly(aib->spec_tile, aib->rand_rng);
truelight@2381: 
truelight@2381: 			// check if the track can be build there.
truelight@2381: 			rule = AiBuildDefaultRailTrack(aib->use_tile,
truelight@2381: 				p->ai.build_kind, p->ai.num_wagons,
truelight@2381: 				aib->unk6, aib->unk7,
tron@3965: 				aib->direction, aib->cargo,
tron@3965: 				p->ai.railtype_to_use,
tron@3965: 				&cost
tron@3033: 			);
truelight@2381: 
truelight@2381: 			if (rule == -1) {
truelight@2381: 				// cannot build, terraform after a while
truelight@2381: 				if (p->ai.state_counter >= 600) {
truelight@2381: 					AiDoTerraformLand(aib->use_tile, Random()&3, 3, (int8)p->ai.state_mode);
truelight@2381: 				}
truelight@2381: 				// also try the other terraform direction
truelight@2381: 				if (++p->ai.state_counter >= 1000) {
truelight@2381: 					p->ai.state_counter = 0;
truelight@2381: 					p->ai.state_mode = -p->ai.state_mode;
truelight@2381: 				}
truelight@2381: 			} else if (CheckPlayerHasMoney(cost)) {
truelight@2381: 				int32 r;
truelight@2381: 				// player has money, build it.
truelight@2381: 				aib->cur_building_rule = rule;
truelight@2381: 
truelight@2381: 				r = AiDoBuildDefaultRailTrack(
truelight@2381: 					aib->use_tile,
truelight@2381: 					_default_rail_track_data[rule]->data,
tron@3965: 					p->ai.railtype_to_use,
truelight@2381: 					DC_EXEC | DC_NO_TOWN_RATING
truelight@2381: 				);
peter1138@2737: 				assert(!CmdFailed(r));
truelight@2381: 			}
truelight@2381: 		} while (++aib,--j);
tron@2648: 	}
truelight@2381: 
truelight@2381: 	// check if we're done with all of them
truelight@2381: 	aib = &p->ai.src;
truelight@2381: 	j = p->ai.num_build_rec;
truelight@2381: 	do {
tron@2639: 		if (aib->cur_building_rule == 255) return;
truelight@2381: 	} while (++aib,--j);
truelight@2381: 
truelight@2381: 	// yep, all are done. switch state to the rail building state.
truelight@2381: 	p->ai.state = AIS_BUILD_RAIL;
truelight@2381: 	p->ai.state_mode = 255;
truelight@2381: }
truelight@2381: 
truelight@2381: static TileIndex AiGetEdgeOfDefaultRailBlock(byte rule, TileIndex tile, byte cmd, int *dir)
truelight@2381: {
truelight@2381: 	const AiDefaultBlockData *p = _default_rail_track_data[rule]->data;
truelight@2381: 
truelight@2381: 	while (p->mode != 3 || !((--cmd) & 0x80)) p++;
truelight@2381: 
truelight@2381: 	return tile + ToTileIndexDiff(p->tileoffs) - TileOffsByDir(*dir = p->attr);
truelight@2381: }
truelight@2381: 
truelight@2381: typedef struct AiRailPathFindData {
truelight@2381: 	TileIndex tile;
truelight@2381: 	TileIndex tile2;
truelight@2381: 	int count;
truelight@2381: 	bool flag;
truelight@2381: } AiRailPathFindData;
truelight@2381: 
truelight@2381: static bool AiEnumFollowTrack(TileIndex tile, AiRailPathFindData *a, int track, uint length, byte *state)
truelight@2381: {
tron@2639: 	if (a->flag) return true;
truelight@2381: 
truelight@2381: 	if (length > 20 || tile == a->tile) {
truelight@2381: 		a->flag = true;
truelight@2381: 		return true;
truelight@2381: 	}
truelight@2381: 
tron@2639: 	if (DistanceMax(tile, a->tile2) < 4) a->count++;
truelight@2381: 
truelight@2381: 	return false;
truelight@2381: }
truelight@2381: 
tron@2643: static bool AiDoFollowTrack(const Player* p)
truelight@2381: {
truelight@2381: 	AiRailPathFindData arpfd;
tron@2639: 
truelight@2381: 	arpfd.tile = p->ai.start_tile_a;
truelight@2381: 	arpfd.tile2 = p->ai.cur_tile_a;
truelight@2381: 	arpfd.flag = false;
truelight@2381: 	arpfd.count = 0;
truelight@2381: 	FollowTrack(p->ai.cur_tile_a + TileOffsByDir(p->ai.cur_dir_a), 0x2000 | TRANSPORT_RAIL, p->ai.cur_dir_a^2,
truelight@2381: 		(TPFEnumProc*)AiEnumFollowTrack, NULL, &arpfd);
truelight@2381: 	return arpfd.count > 8;
truelight@2381: }
truelight@2381: 
truelight@2381: typedef struct AiRailFinder {
truelight@2381: 	TileIndex final_tile;
truelight@2381: 	byte final_dir;
truelight@2381: 	byte depth;
truelight@2381: 	byte recursive_mode;
truelight@2381: 	byte cur_best_dir;
truelight@2381: 	byte best_dir;
truelight@2381: 	byte cur_best_depth;
truelight@2381: 	byte best_depth;
truelight@2381: 	uint cur_best_dist;
truelight@2381: 	const byte *best_ptr;
truelight@2381: 	uint best_dist;
truelight@2381: 	TileIndex cur_best_tile, best_tile;
truelight@2381: 	TileIndex bridge_end_tile;
truelight@2381: 	Player *player;
truelight@2381: } AiRailFinder;
truelight@2381: 
truelight@2381: static const byte _ai_table_15[4][8] = {
truelight@2381: 	{0, 0, 4, 3, 3, 1, 128+0, 64},
truelight@2381: 	{1, 1, 2, 0, 4, 2, 128+1, 65},
truelight@2381: 	{0, 2, 2, 3, 5, 1, 128+2, 66},
truelight@2381: 	{1, 3, 5, 0, 3, 2, 128+3, 67}
truelight@2381: };
truelight@2381: 
truelight@2381: static const byte _dir_table_1[] = {3, 9, 12, 6};
truelight@2381: static const byte _dir_table_2[] = {12, 6, 3, 9};
truelight@2381: 
truelight@2381: 
tron@2630: static bool AiIsTileBanned(const Player* p, TileIndex tile, byte val)
tron@2630: {
truelight@2381: 	int i;
truelight@2381: 
tron@2639: 	for (i = 0; i != p->ai.banned_tile_count; i++) {
tron@2639: 		if (p->ai.banned_tiles[i] == tile && p->ai.banned_val[i] == val) {
tron@2639: 			return true;
tron@2639: 		}
tron@2639: 	}
truelight@2381: 	return false;
truelight@2381: }
truelight@2381: 
tron@2639: static void AiBanTile(Player* p, TileIndex tile, byte val)
tron@2639: {
truelight@2381: 	int i;
truelight@2381: 
tron@2639: 	for (i = lengthof(p->ai.banned_tiles) - 1; i != 0; i--) {
tron@2639: 		p->ai.banned_tiles[i] = p->ai.banned_tiles[i - 1];
tron@2639: 		p->ai.banned_val[i] = p->ai.banned_val[i - 1];
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	p->ai.banned_tiles[0] = tile;
truelight@2381: 	p->ai.banned_val[0] = val;
truelight@2381: 
tron@2639: 	if (p->ai.banned_tile_count != lengthof(p->ai.banned_tiles)) {
truelight@2381: 		p->ai.banned_tile_count++;
tron@2639: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiBuildRailRecursive(AiRailFinder *arf, TileIndex tile, int dir);
truelight@2381: 
truelight@2381: static bool AiCheckRailPathBetter(AiRailFinder *arf, const byte *p)
truelight@2381: {
truelight@2381: 	bool better = false;
truelight@2381: 
truelight@2381: 	if (arf->recursive_mode < 1) {
truelight@2381: 		// Mode is 0. This means destination has not been found yet.
truelight@2381: 		// If the found path is shorter than the current one, remember it.
truelight@2381: 		if (arf->cur_best_dist < arf->best_dist) {
truelight@2381: 			arf->best_dir = arf->cur_best_dir;
truelight@2381: 			arf->best_dist = arf->cur_best_dist;
truelight@2381: 			arf->best_ptr = p;
truelight@2381: 			arf->best_tile = arf->cur_best_tile;
truelight@2381: 			better = true;
truelight@2381: 		}
truelight@2381: 	} else if (arf->recursive_mode > 1) {
truelight@2381: 		// Mode is 2.
truelight@2381: 		if (arf->best_dist != 0 || arf->cur_best_depth < arf->best_depth) {
truelight@2381: 			arf->best_depth = arf->cur_best_depth;
truelight@2381: 			arf->best_dist = 0;
truelight@2381: 			arf->best_ptr = p;
truelight@2381: 			arf->best_tile = 0;
truelight@2381: 			better = true;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 	arf->recursive_mode = 0;
truelight@2381: 	arf->cur_best_dist = (uint)-1;
truelight@2381: 	arf->cur_best_depth = 0xff;
truelight@2381: 
truelight@2381: 	return better;
truelight@2381: }
truelight@2381: 
truelight@2381: static inline void AiCheckBuildRailBridgeHere(AiRailFinder *arf, TileIndex tile, const byte *p)
truelight@2381: {
truelight@2381: 	TileIndex tile_new;
tron@3644: 	Slope tileh;
tron@3088: 	uint z;
truelight@2381: 	bool flag;
truelight@2381: 
truelight@2381: 	int dir2 = p[0] & 3;
truelight@2381: 
tron@3088: 	tileh = GetTileSlope(tile, &z);
tron@3644: 	if (tileh == _dir_table_1[dir2] || (tileh == SLOPE_FLAT && z != 0)) {
truelight@2381: 		tile_new = tile;
truelight@2381: 		// Allow bridges directly over bottom tiles
tron@3088: 		flag = z == 0;
tron@2952: 		for (;;) {
tron@3088: 			TileType type;
tron@3088: 
truelight@2381: 			if ((TileIndexDiff)tile_new < -TileOffsByDir(dir2)) return; // Wraping around map, no bridge possible!
truelight@2381: 			tile_new = TILE_MASK(tile_new + TileOffsByDir(dir2));
tron@3088: 			type = GetTileType(tile_new);
tron@3088: 
tron@3644: 			if (type == MP_CLEAR || type == MP_TREES || GetTileSlope(tile_new, NULL) != SLOPE_FLAT) {
truelight@2381: 				if (!flag) return;
truelight@2381: 				break;
truelight@2381: 			}
tron@3088: 			if (type != MP_WATER && type != MP_RAILWAY && type != MP_STREET) return;
truelight@2381: 			flag = true;
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		// Is building a (rail)bridge possible at this place (type doesn't matter)?
tron@3491: 		if (CmdFailed(DoCommand(tile_new, tile, 0 | arf->player->ai.railtype_to_use << 8,
truelight@2381: 			DC_AUTO, CMD_BUILD_BRIDGE)) )
truelight@2381: 				return;
truelight@2381: 		AiBuildRailRecursive(arf, tile_new, dir2);
truelight@2381: 
truelight@2381: 		// At the bottom depth, check if the new path is better than the old one.
truelight@2381: 		if (arf->depth == 1) {
truelight@2381: 			if (AiCheckRailPathBetter(arf, p))
truelight@2381: 				arf->bridge_end_tile = tile_new;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static inline void AiCheckBuildRailTunnelHere(AiRailFinder *arf, TileIndex tile, const byte *p)
truelight@2381: {
tron@3088: 	uint z;
tron@3088: 
tron@3088: 	if (GetTileSlope(tile, &z) == _dir_table_2[p[0] & 3] && z != 0) {
tron@3491: 		int32 cost = DoCommand(tile, arf->player->ai.railtype_to_use, 0, DC_AUTO, CMD_BUILD_TUNNEL);
truelight@2381: 
truelight@2381: 		if (!CmdFailed(cost) && cost <= (arf->player->player_money>>4)) {
truelight@2381: 			AiBuildRailRecursive(arf, _build_tunnel_endtile, p[0]&3);
truelight@2381: 			if (arf->depth == 1) {
truelight@2381: 				AiCheckRailPathBetter(arf, p);
truelight@2381: 			}
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiBuildRailRecursive(AiRailFinder *arf, TileIndex tile, int dir)
truelight@2381: {
truelight@2381: 	const byte *p;
truelight@2381: 
truelight@2381: 	tile = TILE_MASK(tile + TileOffsByDir(dir));
truelight@2381: 
truelight@2381: 	// Reached destination?
truelight@2381: 	if (tile == arf->final_tile) {
truelight@2381: 		if (arf->final_dir != (dir^2)) {
truelight@2381: 			if (arf->recursive_mode != 2)
truelight@2381: 				arf->recursive_mode = 1;
truelight@2381: 		} else if (arf->recursive_mode != 2) {
truelight@2381: 			arf->recursive_mode = 2;
truelight@2381: 			arf->cur_best_depth = arf->depth;
truelight@2381: 		} else {
truelight@2381: 			if (arf->depth < arf->cur_best_depth)
truelight@2381: 				arf->cur_best_depth = arf->depth;
truelight@2381: 		}
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Depth too deep?
truelight@2381: 	if (arf->depth >= 4) {
truelight@2381: 		uint dist = DistanceMaxPlusManhattan(tile, arf->final_tile);
truelight@2381: 		if (dist < arf->cur_best_dist) {
truelight@2381: 			// Store the tile that is closest to the final position.
truelight@2381: 			arf->cur_best_depth = arf->depth;
truelight@2381: 			arf->cur_best_dist = dist;
truelight@2381: 			arf->cur_best_tile = tile;
truelight@2381: 			arf->cur_best_dir = dir;
truelight@2381: 		}
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Increase recursion depth
truelight@2381: 	arf->depth++;
truelight@2381: 
truelight@2381: 	// Grab pointer to list of stuff that is possible to build
truelight@2381: 	p = _ai_table_15[dir];
truelight@2381: 
truelight@2381: 	// Try to build a single rail in all directions.
tron@3088: 	if (GetTileZ(tile) == 0) {
truelight@2381: 		p += 6;
truelight@2381: 	} else {
truelight@2381: 		do {
truelight@2381: 			// Make sure the tile is not in the list of banned tiles and that a rail can be built here.
truelight@2381: 			if (!AiIsTileBanned(arf->player, tile, p[0]) &&
tron@3491: 					!CmdFailed(DoCommand(tile, arf->player->ai.railtype_to_use, p[0], DC_AUTO | DC_NO_WATER | DC_NO_RAIL_OVERLAP, CMD_BUILD_SINGLE_RAIL))) {
truelight@2381: 				AiBuildRailRecursive(arf, tile, p[1]);
truelight@2381: 			}
truelight@2381: 
truelight@2381: 			// At the bottom depth?
truelight@2381: 			if (arf->depth == 1) {
truelight@2381: 				AiCheckRailPathBetter(arf, p);
truelight@2381: 			}
truelight@2381: 
truelight@2381: 			p += 2;
truelight@2381: 		} while (!(p[0]&0x80));
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	AiCheckBuildRailBridgeHere(arf, tile, p);
truelight@2381: 	AiCheckBuildRailTunnelHere(arf, tile, p+1);
truelight@2381: 
truelight@2381: 	arf->depth--;
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static const byte _dir_table_3[]= {0x25, 0x2A, 0x19, 0x16};
truelight@2381: 
truelight@2381: static void AiBuildRailConstruct(Player *p)
truelight@2381: {
truelight@2381: 	AiRailFinder arf;
truelight@2381: 	int i;
truelight@2381: 
truelight@2381: 	// Check too much lookahead?
truelight@2381: 	if (AiDoFollowTrack(p)) {
truelight@2381: 		p->ai.state_counter = (Random()&0xE)+6; // Destruct this amount of blocks
truelight@2381: 		p->ai.state_mode = 1; // Start destruct
truelight@2381: 
truelight@2381: 		// Ban this tile and don't reach it for a while.
truelight@2381: 		AiBanTile(p, p->ai.cur_tile_a, FindFirstBit(GetRailTrackStatus(p->ai.cur_tile_a)));
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Setup recursive finder and call it.
truelight@2381: 	arf.player = p;
truelight@2381: 	arf.final_tile = p->ai.cur_tile_b;
truelight@2381: 	arf.final_dir = p->ai.cur_dir_b;
truelight@2381: 	arf.depth = 0;
truelight@2381: 	arf.recursive_mode = 0;
truelight@2381: 	arf.best_ptr = NULL;
truelight@2381: 	arf.cur_best_dist = (uint)-1;
truelight@2381: 	arf.cur_best_depth = 0xff;
truelight@2381: 	arf.best_dist = (uint)-1;
truelight@2381: 	arf.best_depth = 0xff;
truelight@2381: 	arf.cur_best_tile = 0;
truelight@2381: 	arf.best_tile = 0;
truelight@2381: 	AiBuildRailRecursive(&arf, p->ai.cur_tile_a, p->ai.cur_dir_a);
truelight@2381: 
truelight@2381: 	// Reached destination?
truelight@2381: 	if (arf.recursive_mode == 2 && arf.cur_best_depth == 0) {
truelight@2381: 		p->ai.state_mode = 255;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Didn't find anything to build?
truelight@2381: 	if (arf.best_ptr == NULL) {
truelight@2381: 		// Terraform some
tron@2952: 		for (i=0; i!=5; i++)
truelight@2381: 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
truelight@2381: 
truelight@2381: 		if (++p->ai.state_counter == 21) {
truelight@2381: 			p->ai.state_counter = 40;
truelight@2381: 			p->ai.state_mode = 1;
truelight@2381: 
truelight@2381: 			// Ban this tile
truelight@2381: 			AiBanTile(p, p->ai.cur_tile_a, FindFirstBit(GetRailTrackStatus(p->ai.cur_tile_a)));
truelight@2381: 		}
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	p->ai.cur_tile_a += TileOffsByDir(p->ai.cur_dir_a);
truelight@2381: 
tron@3033: 	if (arf.best_ptr[0] & 0x80) {
truelight@2381: 		int i;
truelight@2381: 		int32 bridge_len = GetBridgeLength(arf.bridge_end_tile, p->ai.cur_tile_a);
truelight@2381: 
truelight@2381: 		/*	Figure out what (rail)bridge type to build
truelight@2381: 				start with best bridge, then go down to worse and worse bridges
truelight@2381: 				unnecessary to check for worse bridge (i=0), since AI will always build that.
truelight@2381: 				AI is so fucked up that fixing this small thing will probably not solve a thing
truelight@2381: 		*/
truelight@2381: 		for (i = MAX_BRIDGES - 1; i != 0; i--) {
truelight@2381: 			if (CheckBridge_Stuff(i, bridge_len)) {
tron@3491: 				int32 cost = DoCommand(arf.bridge_end_tile, p->ai.cur_tile_a, i | (p->ai.railtype_to_use << 8), DC_AUTO, CMD_BUILD_BRIDGE);
truelight@2381: 				if (!CmdFailed(cost) && cost < (p->player_money >> 5))
truelight@2381: 					break;
truelight@2381: 			}
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		// Build it
tron@3491: 		DoCommand(arf.bridge_end_tile, p->ai.cur_tile_a, i | (p->ai.railtype_to_use << 8), DC_AUTO | DC_EXEC, CMD_BUILD_BRIDGE);
truelight@2381: 
truelight@2381: 		p->ai.cur_tile_a = arf.bridge_end_tile;
truelight@2381: 		p->ai.state_counter = 0;
truelight@2381: 	} else if (arf.best_ptr[0]&0x40) {
truelight@2381: 		// tunnel
tron@3491: 		DoCommand(p->ai.cur_tile_a, p->ai.railtype_to_use, 0, DC_AUTO | DC_EXEC, CMD_BUILD_TUNNEL);
truelight@2381: 		p->ai.cur_tile_a = _build_tunnel_endtile;
truelight@2381: 		p->ai.state_counter = 0;
truelight@2381: 	} else {
truelight@2381: 		// rail
truelight@2381: 		p->ai.cur_dir_a = arf.best_ptr[1];
tron@3491: 		DoCommand(p->ai.cur_tile_a, p->ai.railtype_to_use, arf.best_ptr[0],
truelight@2381: 			DC_EXEC | DC_AUTO | DC_NO_WATER | DC_NO_RAIL_OVERLAP, CMD_BUILD_SINGLE_RAIL);
truelight@2381: 		p->ai.state_counter = 0;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	if (arf.best_tile != 0) {
tron@3033: 		for (i = 0; i != 2; i++) {
truelight@2381: 			AiDoTerraformLand(arf.best_tile, arf.best_dir, 3, 0);
tron@3033: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static bool AiRemoveTileAndGoForward(Player *p)
truelight@2381: {
truelight@2381: 	byte b;
truelight@2381: 	int bit;
truelight@2381: 	const byte *ptr;
truelight@2381: 	TileIndex tile = p->ai.cur_tile_a;
truelight@2381: 	TileIndex tilenew;
truelight@2381: 
truelight@2381: 	if (IsTileType(tile, MP_TUNNELBRIDGE)) {
tron@3184: 		if (IsTunnel(tile)) {
truelight@2381: 			// Clear the tunnel and continue at the other side of it.
tron@3491: 			if (CmdFailed(DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR)))
truelight@2381: 				return false;
truelight@2381: 			p->ai.cur_tile_a = TILE_MASK(_build_tunnel_endtile - TileOffsByDir(p->ai.cur_dir_a));
truelight@2381: 			return true;
celestar@3933: 		} else {
truelight@2381: 			// Check if the bridge points in the right direction.
truelight@2381: 			// This is not really needed the first place AiRemoveTileAndGoForward is called.
tron@3196: 			if (DiagDirToAxis(GetBridgeRampDirection(tile)) != (p->ai.cur_dir_a & 1U)) return false;
truelight@2381: 
tron@3214: 			tile = GetOtherBridgeEnd(tile);
tron@3214: 
tron@3214: 			tilenew = TILE_MASK(tile - TileOffsByDir(p->ai.cur_dir_a));
truelight@2381: 			// And clear the bridge.
tron@3491: 			if (CmdFailed(DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR)))
truelight@2381: 				return false;
truelight@2381: 			p->ai.cur_tile_a = tilenew;
truelight@2381: 			return true;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Find the railtype at the position. Quit if no rail there.
truelight@2381: 	b = GetRailTrackStatus(tile) & _dir_table_3[p->ai.cur_dir_a];
tron@3033: 	if (b == 0) return false;
truelight@2381: 
truelight@2381: 	// Convert into a bit position that CMD_REMOVE_SINGLE_RAIL expects.
truelight@2381: 	bit = FindFirstBit(b);
truelight@2381: 
truelight@2381: 	// Then remove and signals if there are any.
truelight@2381: 	if (IsTileType(tile, MP_RAILWAY) &&
rubidium@3792: 			GetRailTileType(tile) == RAIL_TILE_SIGNALS) {
tron@3491: 		DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_SIGNALS);
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// And also remove the rail.
tron@3491: 	if (CmdFailed(DoCommand(tile, 0, bit, DC_EXEC, CMD_REMOVE_SINGLE_RAIL)))
truelight@2381: 		return false;
truelight@2381: 
truelight@2381: 	// Find the direction at the other edge of the rail.
tron@3033: 	ptr = _ai_table_15[p->ai.cur_dir_a ^ 2];
tron@3033: 	while (ptr[0] != bit) ptr += 2;
truelight@2381: 	p->ai.cur_dir_a = ptr[1] ^ 2;
truelight@2381: 
truelight@2381: 	// And then also switch tile.
truelight@2381: 	p->ai.cur_tile_a = TILE_MASK(p->ai.cur_tile_a - TileOffsByDir(p->ai.cur_dir_a));
truelight@2381: 
truelight@2381: 	return true;
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiBuildRailDestruct(Player *p)
truelight@2381: {
truelight@2381: 	// Decrease timeout.
truelight@2381: 	if (!--p->ai.state_counter) {
truelight@2381: 		p->ai.state_mode = 2;
truelight@2381: 		p->ai.state_counter = 0;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Don't do anything if the destination is already reached.
tron@3033: 	if (p->ai.cur_tile_a == p->ai.start_tile_a) return;
truelight@2381: 
truelight@2381: 	AiRemoveTileAndGoForward(p);
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiBuildRail(Player *p)
truelight@2381: {
truelight@2381: 	if (p->ai.state_mode < 1) {
truelight@2381: 		// Construct mode, build new rail.
truelight@2381: 		AiBuildRailConstruct(p);
truelight@2381: 	} else if (p->ai.state_mode == 1) {
truelight@2381: 		// Destruct mode, destroy the rail currently built.
truelight@2381: 		AiBuildRailDestruct(p);
truelight@2381: 	} else if (p->ai.state_mode == 2) {
tron@3033: 		uint i;
truelight@2381: 
truelight@2381: 		// Terraform some and then try building again.
tron@3033: 		for (i = 0; i != 4; i++)
truelight@2381: 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
truelight@2381: 
truelight@2381: 		if (++p->ai.state_counter == 4) {
truelight@2381: 			p->ai.state_counter = 0;
truelight@2381: 			p->ai.state_mode = 0;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateBuildRail(Player *p)
truelight@2381: {
truelight@2381: 	int num;
truelight@2381: 	AiBuildRec *aib;
truelight@2381: 	byte cmd;
truelight@2381: 	TileIndex tile;
truelight@2381: 	int dir;
truelight@2381: 
truelight@2381: 	// time out?
truelight@2381: 	if (++p->ai.timeout_counter == 1388) {
truelight@2381: 		p->ai.state = AIS_DELETE_RAIL_BLOCKS;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Currently building a rail between two points?
truelight@2381: 	if (p->ai.state_mode != 255) {
truelight@2381: 		AiBuildRail(p);
truelight@2381: 
truelight@2381: 		// Alternate between edges
truelight@2381: 		swap_tile(&p->ai.start_tile_a, &p->ai.start_tile_b);
truelight@2381: 		swap_tile(&p->ai.cur_tile_a, &p->ai.cur_tile_b);
truelight@2381: 		swap_byte(&p->ai.start_dir_a, &p->ai.start_dir_b);
truelight@2381: 		swap_byte(&p->ai.cur_dir_a, &p->ai.cur_dir_b);
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Now, find two new points to build between
truelight@2381: 	num = p->ai.num_build_rec;
truelight@2381: 	aib = &p->ai.src;
truelight@2381: 
tron@2952: 	for (;;) {
truelight@2381: 		cmd = aib->buildcmd_a;
truelight@2381: 		aib->buildcmd_a = 255;
truelight@2381: 		if (cmd != 255) break;
truelight@2381: 
truelight@2381: 		cmd = aib->buildcmd_b;
truelight@2381: 		aib->buildcmd_b = 255;
truelight@2381: 		if (cmd != 255) break;
truelight@2381: 
truelight@2381: 		aib++;
truelight@2381: 		if (--num == 0) {
truelight@2381: 			p->ai.state = AIS_BUILD_RAIL_VEH;
truelight@2381: 			p->ai.state_counter = 0; // timeout
truelight@2381: 			return;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Find first edge to build from.
truelight@2381: 	tile = AiGetEdgeOfDefaultRailBlock(aib->cur_building_rule, aib->use_tile, cmd&3, &dir);
truelight@2381: 	p->ai.start_tile_a = tile;
truelight@2381: 	p->ai.cur_tile_a = tile;
truelight@2381: 	p->ai.start_dir_a = dir;
truelight@2381: 	p->ai.cur_dir_a = dir;
tron@3491: 	DoCommand(TILE_MASK(tile + TileOffsByDir(dir)), 0, (dir&1)?1:0, DC_EXEC, CMD_REMOVE_SINGLE_RAIL);
truelight@2381: 
truelight@2381: 	assert(TILE_MASK(tile) != 0xFF00);
truelight@2381: 
truelight@2381: 	// Find second edge to build to
truelight@2381: 	aib = (&p->ai.src) + ((cmd >> 4)&0xF);
truelight@2381: 	tile = AiGetEdgeOfDefaultRailBlock(aib->cur_building_rule, aib->use_tile, (cmd>>2)&3, &dir);
truelight@2381: 	p->ai.start_tile_b = tile;
truelight@2381: 	p->ai.cur_tile_b = tile;
truelight@2381: 	p->ai.start_dir_b = dir;
truelight@2381: 	p->ai.cur_dir_b = dir;
tron@3491: 	DoCommand(TILE_MASK(tile + TileOffsByDir(dir)), 0, (dir&1)?1:0, DC_EXEC, CMD_REMOVE_SINGLE_RAIL);
truelight@2381: 
truelight@2381: 	assert(TILE_MASK(tile) != 0xFF00);
truelight@2381: 
truelight@2381: 	// And setup state.
truelight@2381: 	p->ai.state_mode = 2;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.banned_tile_count = 0;
truelight@2381: }
truelight@2381: 
tron@3315: static StationID AiGetStationIdByDef(TileIndex tile, int id)
truelight@2381: {
truelight@2381: 	const AiDefaultBlockData *p = _default_rail_track_data[id]->data;
truelight@2381: 	while (p->mode != 1) p++;
tron@3315: 	return GetStationIndex(TILE_ADD(tile, ToTileIndexDiff(p->tileoffs)));
truelight@2381: }
truelight@2381: 
celestar@3355: static EngineID AiFindBestWagon(CargoID cargo, RailType railtype)
celestar@3355: {
celestar@3355: 	EngineID best_veh_index = INVALID_ENGINE;
celestar@3355: 	EngineID i;
celestar@3355: 	uint16 best_capacity = 0;
celestar@3355: 	uint16 best_speed    = 0;
celestar@3355: 	uint speed;
celestar@3355: 
celestar@3355: 	for (i = 0; i < NUM_TRAIN_ENGINES; i++) {
celestar@3355: 		const RailVehicleInfo *rvi = RailVehInfo(i);
celestar@3355: 		const Engine* e = GetEngine(i);
celestar@3355: 
celestar@3355: 		if (!IsCompatibleRail(e->railtype, railtype) ||
celestar@3355: 				!(rvi->flags & RVI_WAGON) ||
celestar@3355: 				!HASBIT(e->player_avail, _current_player)) {
celestar@3355: 			continue;
celestar@3355: 		}
celestar@3355: 
celestar@3355: 		if (rvi->cargo_type != cargo) {
celestar@3355: 			continue;
celestar@3355: 		}
celestar@3355: 
celestar@3355: 		/* max_speed of 0 indicates no speed limit */
celestar@3355: 		speed = rvi->max_speed == 0 ? 0xFFFF : rvi->max_speed;
celestar@3355: 
celestar@3355: 		if (rvi->capacity >= best_capacity && speed >= best_speed) {
celestar@3355: 			best_capacity = rvi->capacity;
celestar@3355: 			best_speed    = best_speed;
celestar@3355: 			best_veh_index = i;
celestar@3355: 		}
celestar@3355: 	}
celestar@3355: 
celestar@3355: 	return best_veh_index;
celestar@3355: }
celestar@3355: 
truelight@2381: static void AiStateBuildRailVeh(Player *p)
truelight@2381: {
truelight@2381: 	const AiDefaultBlockData *ptr;
truelight@2381: 	TileIndex tile;
tron@2544: 	EngineID veh;
tron@2544: 	int i;
Darkvater@3348: 	CargoID cargo;
truelight@2381: 	int32 cost;
truelight@2381: 	Vehicle *v;
truelight@2381: 	uint loco_id;
truelight@2381: 
truelight@2381: 	ptr = _default_rail_track_data[p->ai.src.cur_building_rule]->data;
tron@3033: 	while (ptr->mode != 0) ptr++;
truelight@2381: 
truelight@2381: 	tile = TILE_ADD(p->ai.src.use_tile, ToTileIndexDiff(ptr->tileoffs));
truelight@2381: 
celestar@3355: 
truelight@2381: 	cargo = p->ai.cargo_type;
tron@3033: 	for (i = 0;;) {
truelight@2381: 		if (p->ai.wagon_list[i] == INVALID_VEHICLE) {
celestar@3355: 			veh = AiFindBestWagon(cargo, p->ai.railtype_to_use);
celestar@3355: 			/* veh will return INVALID_ENGINE if no suitable wagon is available.
celestar@3355: 			 * We shall treat this in the same way as having no money */
celestar@3355: 			if (veh == INVALID_ENGINE) goto handle_nocash;
tron@3491: 			cost = DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE);
truelight@2381: 			if (CmdFailed(cost)) goto handle_nocash;
tron@3948: 			p->ai.wagon_list[i] = _new_vehicle_id;
tron@3033: 			p->ai.wagon_list[i + 1] = INVALID_VEHICLE;
truelight@2381: 			return;
truelight@2381: 		}
truelight@2381: 		if (cargo == CT_MAIL)
truelight@2381: 			cargo = CT_PASSENGERS;
truelight@2381: 		if (++i == p->ai.num_wagons * 2 - 1)
truelight@2381: 			break;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Which locomotive to build?
truelight@2381: 	veh = AiChooseTrainToBuild(p->ai.railtype_to_use, p->player_money, (cargo!=CT_PASSENGERS)?1:0, tile);
tron@2544: 	if (veh == INVALID_ENGINE) {
truelight@2381: handle_nocash:
truelight@2381: 		// after a while, if AI still doesn't have cash, get out of this block by selling the wagons.
truelight@2381: 		if (++p->ai.state_counter == 1000) {
tron@3033: 			for (i = 0; p->ai.wagon_list[i] != INVALID_VEHICLE; i++) {
tron@3491: 				cost = DoCommand(tile, p->ai.wagon_list[i], 0, DC_EXEC, CMD_SELL_RAIL_WAGON);
truelight@2381: 				assert(!CmdFailed(cost));
truelight@2381: 			}
truelight@2381: 			p->ai.state =	AIS_0;
truelight@2381: 		}
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Try to build the locomotive
tron@3491: 	cost = DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE);
truelight@2381: 	assert(!CmdFailed(cost));
tron@3948: 	loco_id = _new_vehicle_id;
truelight@2381: 
truelight@2381: 	// Sell a vehicle if the train is double headed.
truelight@2381: 	v = GetVehicle(loco_id);
truelight@2381: 	if (v->next != NULL) {
tron@3033: 		i = p->ai.wagon_list[p->ai.num_wagons * 2 - 2];
tron@3033: 		p->ai.wagon_list[p->ai.num_wagons * 2 - 2] = INVALID_VEHICLE;
tron@3491: 		DoCommand(tile, i, 0, DC_EXEC, CMD_SELL_RAIL_WAGON);
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Move the wagons onto the train
tron@3033: 	for (i = 0; p->ai.wagon_list[i] != INVALID_VEHICLE; i++) {
tron@3491: 		DoCommand(tile, p->ai.wagon_list[i] | (loco_id << 16), 0, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);
truelight@2381: 	}
truelight@2381: 
tron@3033: 	for (i = 0; p->ai.order_list_blocks[i] != 0xFF; i++) {
truelight@2381: 		AiBuildRec *aib = (&p->ai.src) + p->ai.order_list_blocks[i];
tron@3033: 		bool is_pass = (
tron@3033: 			p->ai.cargo_type == CT_PASSENGERS ||
tron@3033: 			p->ai.cargo_type == CT_MAIL ||
tron@3033: 			(_opt.landscape == LT_NORMAL && p->ai.cargo_type == CT_VALUABLES)
tron@3033: 		);
truelight@2381: 		Order order;
truelight@2381: 
truelight@2381: 		order.type = OT_GOTO_STATION;
truelight@2381: 		order.flags = 0;
truelight@2381: 		order.station = AiGetStationIdByDef(aib->use_tile, aib->cur_building_rule);
truelight@2381: 
truelight@2381: 		if (!is_pass && i == 1) order.flags |= OF_UNLOAD;
truelight@2381: 		if (p->ai.num_want_fullload != 0 && (is_pass || i == 0))
truelight@2381: 			order.flags |= OF_FULL_LOAD;
truelight@2381: 
tron@3491: 		DoCommand(0, loco_id + (i << 16),	PackOrder(&order), DC_EXEC, CMD_INSERT_ORDER);
truelight@2381: 	}
truelight@2381: 
tron@3491: 	DoCommand(0, loco_id, 0, DC_EXEC, CMD_START_STOP_TRAIN);
tron@3491: 
tron@3491: 	DoCommand(0, loco_id, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
truelight@2381: 
tron@3033: 	if (p->ai.num_want_fullload != 0) p->ai.num_want_fullload--;
truelight@2381: 
truelight@2381: 	if (--p->ai.num_loco_to_build != 0) {
truelight@2381: //		p->ai.loco_id = INVALID_VEHICLE;
truelight@2381: 		p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@2381: 	} else {
truelight@2381: 		p->ai.state =	AIS_0;
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateDeleteRailBlocks(Player *p)
truelight@2381: {
truelight@2381: 	int num;
truelight@2381: 	AiBuildRec *aib;
truelight@2381: 	const AiDefaultBlockData *b;
truelight@2381: 
truelight@2381: 	num = p->ai.num_build_rec;
truelight@2381: 	aib = &p->ai.src;
truelight@2381: 	do {
truelight@2381: 		if (aib->cur_building_rule != 255) {
truelight@2381: 			b = _default_rail_track_data[aib->cur_building_rule]->data;
truelight@2381: 			while (b->mode != 4) {
tron@3491: 				DoCommand(TILE_ADD(aib->use_tile, ToTileIndexDiff(b->tileoffs)), 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@2381: 				b++;
truelight@2381: 			}
truelight@2381: 		}
truelight@2381: 	} while (++aib,--num);
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_0;
truelight@2381: }
truelight@2381: 
truelight@2381: static bool AiCheckRoadResources(TileIndex tile, const AiDefaultBlockData *p, byte cargo)
truelight@2381: {
truelight@2381: 	uint values[NUM_CARGO];
truelight@2381: 	int rad;
truelight@2381: 
truelight@2381: 	if (_patches.modified_catchment) {
truelight@2381: 		rad = CA_TRUCK;		//Same as CA_BUS at the moment?
truelight@2381: 	} else {			//change that at some point?
truelight@2381: 		rad = 4;
truelight@2381: 	}
truelight@2381: 
tron@3033: 	for (;; p++) {
truelight@2381: 		if (p->mode == 4) {
truelight@2381: 			return true;
truelight@2381: 		} else if (p->mode == 1) {
truelight@2381: 			TileIndex tile2 = TILE_ADD(tile, ToTileIndexDiff(p->tileoffs));
truelight@2381: 
truelight@2381: 			if (cargo & 0x80) {
truelight@2381: 				GetProductionAroundTiles(values, tile2, 1, 1, rad);
truelight@2381: 				return values[cargo & 0x7F] != 0;
truelight@2381: 			} else {
truelight@2381: 				GetAcceptanceAroundTiles(values, tile2, 1, 1, rad);
truelight@2381: 				return (values[cargo]&~7) != 0;
truelight@2381: 			}
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static bool _want_road_truck_station;
truelight@2381: static int32 AiDoBuildDefaultRoadBlock(TileIndex tile, const AiDefaultBlockData *p, byte flag);
truelight@2381: 
truelight@2381: // Returns rule and cost
truelight@2381: static int AiFindBestDefaultRoadBlock(TileIndex tile, byte direction, byte cargo, int32 *cost)
truelight@2381: {
truelight@2381: 	int i;
truelight@2381: 	const AiDefaultRoadBlock *p;
truelight@2381: 
truelight@2381: 	_want_road_truck_station = (cargo & 0x7F) != CT_PASSENGERS;
truelight@2381: 
tron@3033: 	for (i = 0; (p = _road_default_block_data[i]) != NULL; i++) {
truelight@2381: 		if (p->dir == direction) {
truelight@2381: 			*cost = AiDoBuildDefaultRoadBlock(tile, p->data, 0);
peter1138@2737: 			if (!CmdFailed(*cost) && AiCheckRoadResources(tile, p->data, cargo))
truelight@2381: 				return i;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	return -1;
truelight@2381: }
truelight@2381: 
truelight@2381: static int32 AiDoBuildDefaultRoadBlock(TileIndex tile, const AiDefaultBlockData *p, byte flag)
truelight@2381: {
truelight@2381: 	int32 ret;
truelight@2381: 	int32 total_cost = 0;
truelight@2381: 	Town *t = NULL;
truelight@2381: 	int rating = 0;
truelight@2381: 	int roadflag = 0;
truelight@2381: 
tron@2952: 	for (;p->mode != 4;p++) {
tron@3033: 		TileIndex c = TILE_MASK(tile + ToTileIndexDiff(p->tileoffs));
truelight@2381: 
truelight@2381: 		_cleared_town = NULL;
truelight@2381: 
truelight@2381: 		if (p->mode == 2) {
truelight@2381: 			if (IsTileType(c, MP_STREET) &&
rubidium@3793: 					GetRoadTileType(c) == ROAD_TILE_NORMAL &&
tron@3071: 					(GetRoadBits(c) & p->attr) != 0) {
truelight@2381: 				roadflag |= 2;
truelight@2381: 
truelight@2381: 				// all bits are already built?
tron@3071: 				if ((GetRoadBits(c) & p->attr) == p->attr) continue;
truelight@2381: 			}
truelight@2381: 
tron@3491: 			ret = DoCommand(c, p->attr, 0, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD);
truelight@2381: 			if (CmdFailed(ret)) return CMD_ERROR;
truelight@2381: 			total_cost += ret;
truelight@2381: 
truelight@2381: 			continue;
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		if (p->mode == 0) {
truelight@2381: 			// Depot
tron@3491: 			ret = DoCommand(c, p->attr, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_ROAD_DEPOT);
truelight@2381: 			goto clear_town_stuff;
truelight@2381: 		} else if (p->mode == 1) {
truelight@2381: 			if (_want_road_truck_station) {
truelight@2381: 				// Truck station
tron@3491: 				ret = DoCommand(c, p->attr, RS_TRUCK, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_ROAD_STOP);
truelight@2381: 			} else {
truelight@2381: 				// Bus station
tron@3491: 				ret = DoCommand(c, p->attr, RS_BUS, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_ROAD_STOP);
truelight@2381: 			}
truelight@2381: clear_town_stuff:;
truelight@2381: 
truelight@2381: 			if (CmdFailed(ret)) return CMD_ERROR;
truelight@2381: 			total_cost += ret;
truelight@2381: 
truelight@2381: 			if (_cleared_town != NULL) {
tron@3033: 				if (t != NULL && t != _cleared_town) return CMD_ERROR;
truelight@2381: 				t = _cleared_town;
truelight@2381: 				rating += _cleared_town_rating;
truelight@2381: 			}
truelight@2381: 		} else if (p->mode == 3) {
tron@3033: 			if (flag & DC_EXEC) continue;
tron@3033: 
tron@3644: 			if (GetTileSlope(c, NULL) != SLOPE_FLAT) return CMD_ERROR;
tron@3033: 
rubidium@3793: 			if (!IsTileType(c, MP_STREET) || GetRoadTileType(c) != ROAD_TILE_NORMAL) {
tron@3491: 				ret = DoCommand(c, 0, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_LANDSCAPE_CLEAR);
truelight@2381: 				if (CmdFailed(ret)) return CMD_ERROR;
truelight@2381: 			}
truelight@2381: 
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
tron@3033: 	if (!_want_road_truck_station && !(roadflag & 2)) return CMD_ERROR;
truelight@2381: 
truelight@2381: 	if (!(flag & DC_EXEC)) {
tron@3033: 		if (t != NULL && rating > t->ratings[_current_player]) return CMD_ERROR;
truelight@2381: 	}
truelight@2381: 	return total_cost;
truelight@2381: }
truelight@2381: 
truelight@2381: // Make sure the blocks are not too close to each other
truelight@2381: static bool AiCheckBlockDistances(Player *p, TileIndex tile)
truelight@2381: {
truelight@2381: 	AiBuildRec *aib;
truelight@2381: 	int num;
truelight@2381: 
truelight@2381: 	num = p->ai.num_build_rec;
truelight@2381: 	aib = &p->ai.src;
truelight@2381: 
truelight@2381: 	do {
truelight@2381: 		if (aib->cur_building_rule != 255) {
tron@3033: 			if (DistanceManhattan(aib->use_tile, tile) < 9) return false;
truelight@2381: 		}
truelight@2381: 	} while (++aib, --num);
truelight@2381: 
truelight@2381: 	return true;
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiStateBuildDefaultRoadBlocks(Player *p)
truelight@2381: {
tron@3033: 	uint i;
tron@3033: 	int j;
truelight@2381: 	AiBuildRec *aib;
truelight@2381: 	int rule;
truelight@2381: 	int32 cost;
truelight@2381: 
truelight@2381: 	// time out?
truelight@2381: 	if (++p->ai.timeout_counter == 1388) {
truelight@2381: 		p->ai.state = AIS_DELETE_RAIL_BLOCKS;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// do the following 8 times
tron@3033: 	for (i = 0; i != 8; i++) {
truelight@2381: 		// check if we can build the default track
truelight@2381: 		aib = &p->ai.src;
truelight@2381: 		j = p->ai.num_build_rec;
truelight@2381: 		do {
truelight@2381: 			// this item has already been built?
tron@3033: 			if (aib->cur_building_rule != 255) continue;
truelight@2381: 
truelight@2381: 			// adjust the coordinate randomly,
truelight@2381: 			// to make sure that we find a position.
truelight@2381: 			aib->use_tile = AdjustTileCoordRandomly(aib->spec_tile, aib->rand_rng);
truelight@2381: 
truelight@2381: 			// check if the road can be built there.
tron@3033: 			rule = AiFindBestDefaultRoadBlock(
tron@3033: 				aib->use_tile, aib->direction, aib->cargo, &cost
tron@3033: 			);
truelight@2381: 
truelight@2381: 			if (rule == -1) {
truelight@2381: 				// cannot build, terraform after a while
truelight@2381: 				if (p->ai.state_counter >= 600) {
truelight@2381: 					AiDoTerraformLand(aib->use_tile, Random()&3, 3, (int8)p->ai.state_mode);
truelight@2381: 				}
truelight@2381: 				// also try the other terraform direction
truelight@2381: 				if (++p->ai.state_counter >= 1000) {
truelight@2381: 					p->ai.state_counter = 0;
truelight@2381: 					p->ai.state_mode = -p->ai.state_mode;
truelight@2381: 				}
truelight@2381: 			} else if (CheckPlayerHasMoney(cost) && AiCheckBlockDistances(p,aib->use_tile)) {
truelight@2381: 				int32 r;
truelight@2381: 
truelight@2381: 				// player has money, build it.
truelight@2381: 				aib->cur_building_rule = rule;
truelight@2381: 
truelight@2381: 				r = AiDoBuildDefaultRoadBlock(
truelight@2381: 					aib->use_tile,
truelight@2381: 					_road_default_block_data[rule]->data,
truelight@2381: 					DC_EXEC | DC_NO_TOWN_RATING
truelight@2381: 				);
peter1138@2737: 				assert(!CmdFailed(r));
truelight@2381: 			}
truelight@2381: 		} while (++aib,--j);
tron@3033: 	}
truelight@2381: 
truelight@2381: 	// check if we're done with all of them
truelight@2381: 	aib = &p->ai.src;
truelight@2381: 	j = p->ai.num_build_rec;
truelight@2381: 	do {
tron@3033: 		if (aib->cur_building_rule == 255) return;
truelight@2381: 	} while (++aib,--j);
truelight@2381: 
truelight@2381: 	// yep, all are done. switch state to the rail building state.
truelight@2381: 	p->ai.state = AIS_BUILD_ROAD;
truelight@2381: 	p->ai.state_mode = 255;
truelight@2381: }
truelight@2381: 
truelight@2381: typedef struct {
truelight@2381: 	TileIndex final_tile;
truelight@2381: 	byte final_dir;
truelight@2381: 	byte depth;
truelight@2381: 	byte recursive_mode;
truelight@2381: 	byte cur_best_dir;
truelight@2381: 	byte best_dir;
truelight@2381: 	byte cur_best_depth;
truelight@2381: 	byte best_depth;
truelight@2381: 	uint cur_best_dist;
truelight@2381: 	const byte *best_ptr;
truelight@2381: 	uint best_dist;
truelight@2381: 	TileIndex cur_best_tile, best_tile;
truelight@2381: 	TileIndex bridge_end_tile;
truelight@2381: 	Player *player;
truelight@2381: } AiRoadFinder;
truelight@2381: 
truelight@2381: typedef struct AiRoadEnum {
truelight@2381: 	TileIndex dest;
truelight@2381: 	TileIndex best_tile;
truelight@2381: 	int best_track;
truelight@2381: 	uint best_dist;
truelight@2381: } AiRoadEnum;
truelight@2381: 
truelight@2381: static const byte _dir_by_track[] = {
truelight@2381: 	0,1,0,1,2,1, 0,0,
truelight@2381: 	2,3,3,2,3,0,
truelight@2381: };
truelight@2381: 
truelight@2381: static void AiBuildRoadRecursive(AiRoadFinder *arf, TileIndex tile, int dir);
truelight@2381: 
truelight@2381: static bool AiCheckRoadPathBetter(AiRoadFinder *arf, const byte *p)
truelight@2381: {
truelight@2381: 	bool better = false;
truelight@2381: 
truelight@2381: 	if (arf->recursive_mode < 1) {
truelight@2381: 		// Mode is 0. This means destination has not been found yet.
truelight@2381: 		// If the found path is shorter than the current one, remember it.
truelight@2381: 		if (arf->cur_best_dist < arf->best_dist ||
truelight@2381: 			(arf->cur_best_dist == arf->best_dist && arf->cur_best_depth < arf->best_depth)) {
truelight@2381: 			arf->best_depth = arf->cur_best_depth;
truelight@2381: 			arf->best_dist = arf->cur_best_dist;
truelight@2381: 			arf->best_dir = arf->cur_best_dir;
truelight@2381: 			arf->best_ptr = p;
truelight@2381: 			arf->best_tile = arf->cur_best_tile;
truelight@2381: 			better = true;
truelight@2381: 		}
truelight@2381: 	} else if (arf->recursive_mode > 1) {
truelight@2381: 		// Mode is 2.
truelight@2381: 		if (arf->best_dist != 0 || arf->cur_best_depth < arf->best_depth) {
truelight@2381: 			arf->best_depth = arf->cur_best_depth;
truelight@2381: 			arf->best_dist = 0;
truelight@2381: 			arf->best_ptr = p;
truelight@2381: 			arf->best_tile = 0;
truelight@2381: 			better = true;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 	arf->recursive_mode = 0;
truelight@2381: 	arf->cur_best_dist = (uint)-1;
truelight@2381: 	arf->cur_best_depth = 0xff;
truelight@2381: 
truelight@2381: 	return better;
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static bool AiEnumFollowRoad(TileIndex tile, AiRoadEnum *a, int track, uint length, byte *state)
truelight@2381: {
truelight@2381: 	uint dist = DistanceManhattan(tile, a->dest);
truelight@2381: 
truelight@2381: 	if (dist <= a->best_dist) {
truelight@2381: 		TileIndex tile2 = TILE_MASK(tile + TileOffsByDir(_dir_by_track[track]));
truelight@2381: 
rubidium@3793: 		if (IsTileType(tile2, MP_STREET) && GetRoadTileType(tile2) == ROAD_TILE_NORMAL) {
truelight@2381: 			a->best_dist = dist;
truelight@2381: 			a->best_tile = tile;
truelight@2381: 			a->best_track = track;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	return false;
truelight@2381: }
truelight@2381: 
truelight@2381: static const uint16 _ai_road_table_and[4] = {
truelight@2381: 	0x1009,
truelight@2381: 	0x16,
truelight@2381: 	0x520,
truelight@2381: 	0x2A00,
truelight@2381: };
truelight@2381: 
truelight@2381: static bool AiCheckRoadFinished(Player *p)
truelight@2381: {
truelight@2381: 	AiRoadEnum are;
truelight@2381: 	TileIndex tile;
truelight@2381: 	int dir = p->ai.cur_dir_a;
truelight@2381: 	uint32 bits;
truelight@2381: 	int i;
truelight@2381: 
truelight@2381: 	are.dest = p->ai.cur_tile_b;
truelight@2381: 	tile = TILE_MASK(p->ai.cur_tile_a + TileOffsByDir(dir));
truelight@2381: 
truelight@2381: 	bits = GetTileTrackStatus(tile, TRANSPORT_ROAD) & _ai_road_table_and[dir];
tron@3033: 	if (bits == 0) return false;
truelight@2381: 
truelight@2381: 	are.best_dist = (uint)-1;
truelight@2381: 
truelight@2381: 	for_each_bit(i, bits) {
truelight@2381: 		FollowTrack(tile, 0x3000 | TRANSPORT_ROAD, _dir_by_track[i], (TPFEnumProc*)AiEnumFollowRoad, NULL, &are);
truelight@2381: 	}
truelight@2381: 
tron@3033: 	if (DistanceManhattan(tile, are.dest) <= are.best_dist) return false;
tron@3033: 
tron@3033: 	if (are.best_dist == 0) return true;
truelight@2381: 
truelight@2381: 	p->ai.cur_tile_a = are.best_tile;
truelight@2381: 	p->ai.cur_dir_a = _dir_by_track[are.best_track];
truelight@2381: 	return false;
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static bool AiBuildRoadHelper(TileIndex tile, int flags, int type)
truelight@2381: {
truelight@2381: 	static const byte _road_bits[] = {
truelight@2381: 		8+2,
truelight@2381: 		1+4,
truelight@2381: 		1+8,
truelight@2381: 		4+2,
truelight@2381: 		1+2,
truelight@2381: 		8+4,
truelight@2381: 	};
tron@3491: 	return !CmdFailed(DoCommand(tile, _road_bits[type], 0, flags, CMD_BUILD_ROAD));
truelight@2381: }
truelight@2381: 
truelight@2381: static inline void AiCheckBuildRoadBridgeHere(AiRoadFinder *arf, TileIndex tile, const byte *p)
truelight@2381: {
truelight@2381: 	TileIndex tile_new;
tron@3644: 	Slope tileh;
tron@3088: 	uint z;
truelight@2381: 	bool flag;
truelight@2381: 
truelight@2381: 	int dir2 = p[0] & 3;
truelight@2381: 
tron@3088: 	tileh = GetTileSlope(tile, &z);
tron@3644: 	if (tileh == _dir_table_1[dir2] || (tileh == SLOPE_FLAT && z != 0)) {
truelight@2381: 		tile_new = tile;
truelight@2381: 		// Allow bridges directly over bottom tiles
tron@3088: 		flag = z == 0;
tron@2952: 		for (;;) {
tron@3088: 			TileType type;
tron@3088: 
truelight@2381: 			if ((TileIndexDiff)tile_new < -TileOffsByDir(dir2)) return; // Wraping around map, no bridge possible!
truelight@2381: 			tile_new = TILE_MASK(tile_new + TileOffsByDir(dir2));
tron@3088: 			type = GetTileType(tile_new);
tron@3088: 
tron@3644: 			if (type == MP_CLEAR || type == MP_TREES || GetTileSlope(tile, NULL) != SLOPE_FLAT) {
truelight@2381: 				// Allow a bridge if either we have a tile that's water, rail or street,
truelight@2381: 				// or if we found an up tile.
truelight@2381: 				if (!flag) return;
truelight@2381: 				break;
truelight@2381: 			}
tron@3088: 			if (type != MP_WATER && type != MP_RAILWAY && type != MP_STREET) return;
truelight@2381: 			flag = true;
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		// Is building a (rail)bridge possible at this place (type doesn't matter)?
tron@3491: 		if (CmdFailed(DoCommand(tile_new, tile, 0x8000, DC_AUTO, CMD_BUILD_BRIDGE)))
truelight@2381: 			return;
truelight@2381: 		AiBuildRoadRecursive(arf, tile_new, dir2);
truelight@2381: 
truelight@2381: 		// At the bottom depth, check if the new path is better than the old one.
truelight@2381: 		if (arf->depth == 1) {
tron@3033: 			if (AiCheckRoadPathBetter(arf, p)) arf->bridge_end_tile = tile_new;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static inline void AiCheckBuildRoadTunnelHere(AiRoadFinder *arf, TileIndex tile, const byte *p)
truelight@2381: {
tron@3088: 	uint z;
tron@3088: 
tron@3088: 	if (GetTileSlope(tile, &z) == _dir_table_2[p[0] & 3] && z != 0) {
tron@3491: 		int32 cost = DoCommand(tile, 0x200, 0, DC_AUTO, CMD_BUILD_TUNNEL);
truelight@2381: 
truelight@2381: 		if (!CmdFailed(cost) && cost <= (arf->player->player_money>>4)) {
truelight@2381: 			AiBuildRoadRecursive(arf, _build_tunnel_endtile, p[0]&3);
truelight@2381: 			if (arf->depth == 1) {
truelight@2381: 				AiCheckRoadPathBetter(arf, p);
truelight@2381: 			}
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiBuildRoadRecursive(AiRoadFinder *arf, TileIndex tile, int dir)
truelight@2381: {
truelight@2381: 	const byte *p;
truelight@2381: 
truelight@2381: 	tile = TILE_MASK(tile + TileOffsByDir(dir));
truelight@2381: 
truelight@2381: 	// Reached destination?
truelight@2381: 	if (tile == arf->final_tile) {
truelight@2381: 		if ((arf->final_dir^2) == dir) {
truelight@2381: 			arf->recursive_mode = 2;
truelight@2381: 			arf->cur_best_depth = arf->depth;
truelight@2381: 		}
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Depth too deep?
truelight@2381: 	if (arf->depth >= 4) {
truelight@2381: 		uint dist = DistanceMaxPlusManhattan(tile, arf->final_tile);
truelight@2381: 		if (dist < arf->cur_best_dist) {
truelight@2381: 			// Store the tile that is closest to the final position.
truelight@2381: 			arf->cur_best_dist = dist;
truelight@2381: 			arf->cur_best_tile = tile;
truelight@2381: 			arf->cur_best_dir = dir;
truelight@2381: 			arf->cur_best_depth = arf->depth;
truelight@2381: 		}
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Increase recursion depth
truelight@2381: 	arf->depth++;
truelight@2381: 
truelight@2381: 	// Grab pointer to list of stuff that is possible to build
truelight@2381: 	p = _ai_table_15[dir];
truelight@2381: 
truelight@2381: 	// Try to build a single rail in all directions.
tron@3088: 	if (GetTileZ(tile) == 0) {
truelight@2381: 		p += 6;
truelight@2381: 	} else {
truelight@2381: 		do {
truelight@2381: 			// Make sure that a road can be built here.
truelight@2381: 			if (AiBuildRoadHelper(tile, DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, p[0])) {
truelight@2381: 				AiBuildRoadRecursive(arf, tile, p[1]);
truelight@2381: 			}
truelight@2381: 
truelight@2381: 			// At the bottom depth?
tron@3033: 			if (arf->depth == 1) AiCheckRoadPathBetter(arf, p);
truelight@2381: 
truelight@2381: 			p += 2;
tron@3033: 		} while (!(p[0] & 0x80));
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	AiCheckBuildRoadBridgeHere(arf, tile, p);
truelight@2381: 	AiCheckBuildRoadTunnelHere(arf, tile, p+1);
truelight@2381: 
truelight@2381: 	arf->depth--;
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiBuildRoadConstruct(Player *p)
truelight@2381: {
truelight@2381: 	AiRoadFinder arf;
truelight@2381: 	int i;
truelight@2381: 	TileIndex tile;
truelight@2381: 
truelight@2381: 	// Reached destination?
truelight@2381: 	if (AiCheckRoadFinished(p)) {
truelight@2381: 		p->ai.state_mode = 255;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Setup recursive finder and call it.
truelight@2381: 	arf.player = p;
truelight@2381: 	arf.final_tile = p->ai.cur_tile_b;
truelight@2381: 	arf.final_dir = p->ai.cur_dir_b;
truelight@2381: 	arf.depth = 0;
truelight@2381: 	arf.recursive_mode = 0;
truelight@2381: 	arf.best_ptr = NULL;
truelight@2381: 	arf.cur_best_dist = (uint)-1;
truelight@2381: 	arf.cur_best_depth = 0xff;
truelight@2381: 	arf.best_dist = (uint)-1;
truelight@2381: 	arf.best_depth =  0xff;
truelight@2381: 	arf.cur_best_tile = 0;
truelight@2381: 	arf.best_tile = 0;
truelight@2381: 	AiBuildRoadRecursive(&arf, p->ai.cur_tile_a, p->ai.cur_dir_a);
truelight@2381: 
truelight@2381: 	// Reached destination?
truelight@2381: 	if (arf.recursive_mode == 2 && arf.cur_best_depth == 0) {
truelight@2381: 		p->ai.state_mode = 255;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Didn't find anything to build?
truelight@2381: 	if (arf.best_ptr == NULL) {
truelight@2381: 		// Terraform some
truelight@2381: do_some_terraform:
tron@3033: 		for (i = 0; i != 5; i++)
truelight@2381: 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
truelight@2381: 
truelight@2381: 		if (++p->ai.state_counter == 21) {
truelight@2381: 			p->ai.state_mode = 1;
truelight@2381: 
truelight@2381: 			p->ai.cur_tile_a = TILE_MASK(p->ai.cur_tile_a + TileOffsByDir(p->ai.cur_dir_a));
truelight@2381: 			p->ai.cur_dir_a ^= 2;
truelight@2381: 			p->ai.state_counter = 0;
truelight@2381: 		}
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	tile = TILE_MASK(p->ai.cur_tile_a + TileOffsByDir(p->ai.cur_dir_a));
truelight@2381: 
truelight@2381: 	if (arf.best_ptr[0]&0x80) {
truelight@2381: 		int i;
truelight@2381: 		int32 bridge_len;
truelight@2381: 		p->ai.cur_tile_a = arf.bridge_end_tile;
truelight@2381: 		bridge_len = GetBridgeLength(tile, p->ai.cur_tile_a); // tile
truelight@2381: 
truelight@2381: 		/*	Figure out what (road)bridge type to build
truelight@2381: 				start with best bridge, then go down to worse and worse bridges
truelight@2381: 				unnecessary to check for worse bridge (i=0), since AI will always build that.
truelight@2381: 				AI is so fucked up that fixing this small thing will probably not solve a thing
truelight@2381: 		*/
tron@2952: 		for (i = 10; i != 0; i--) {
truelight@2381: 			if (CheckBridge_Stuff(i, bridge_len)) {
tron@3491: 				int32 cost = DoCommand(tile, p->ai.cur_tile_a, i + (0x80 << 8), DC_AUTO, CMD_BUILD_BRIDGE);
tron@3033: 				if (!CmdFailed(cost) && cost < (p->player_money >> 5)) break;
truelight@2381: 			}
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		// Build it
tron@3491: 		DoCommand(tile, p->ai.cur_tile_a, i + (0x80 << 8), DC_AUTO | DC_EXEC, CMD_BUILD_BRIDGE);
truelight@2381: 
truelight@2381: 		p->ai.state_counter = 0;
truelight@2381: 	} else if (arf.best_ptr[0]&0x40) {
truelight@2381: 		// tunnel
tron@3491: 		DoCommand(tile, 0x200, 0, DC_AUTO | DC_EXEC, CMD_BUILD_TUNNEL);
truelight@2381: 		p->ai.cur_tile_a = _build_tunnel_endtile;
truelight@2381: 		p->ai.state_counter = 0;
truelight@2381: 	} else {
truelight@2381: 
truelight@2381: 		// road
truelight@2381: 		if (!AiBuildRoadHelper(tile, DC_EXEC | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, arf.best_ptr[0]))
truelight@2381: 			goto do_some_terraform;
truelight@2381: 
truelight@2381: 		p->ai.cur_dir_a = arf.best_ptr[1];
truelight@2381: 		p->ai.cur_tile_a = tile;
truelight@2381: 		p->ai.state_counter = 0;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	if (arf.best_tile != 0) {
tron@3033: 		for (i = 0; i != 2; i++)
truelight@2381: 			AiDoTerraformLand(arf.best_tile, arf.best_dir, 3, 0);
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiBuildRoad(Player *p)
truelight@2381: {
truelight@2381: 	if (p->ai.state_mode < 1) {
truelight@2381: 		// Construct mode, build new road.
truelight@2381: 		AiBuildRoadConstruct(p);
truelight@2381: 	} else if (p->ai.state_mode == 1) {
truelight@2381: 		// Destruct mode, not implemented for roads.
truelight@2381: 		p->ai.state_mode = 2;
truelight@2381: 		p->ai.state_counter = 0;
truelight@2381: 	} else if (p->ai.state_mode == 2) {
tron@3033: 		uint i;
truelight@2381: 
truelight@2381: 		// Terraform some and then try building again.
tron@3033: 		for (i = 0; i != 4; i++)
truelight@2381: 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
truelight@2381: 
truelight@2381: 		if (++p->ai.state_counter == 4) {
truelight@2381: 			p->ai.state_counter = 0;
truelight@2381: 			p->ai.state_mode = 0;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static TileIndex AiGetRoadBlockEdge(byte rule, TileIndex tile, int *dir)
truelight@2381: {
truelight@2381: 	const AiDefaultBlockData *p = _road_default_block_data[rule]->data;
truelight@2381: 	while (p->mode != 1) p++;
truelight@2381: 	*dir = p->attr;
truelight@2381: 	return TILE_ADD(tile, ToTileIndexDiff(p->tileoffs));
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiStateBuildRoad(Player *p)
truelight@2381: {
truelight@2381: 	int num;
truelight@2381: 	AiBuildRec *aib;
truelight@2381: 	byte cmd;
truelight@2381: 	TileIndex tile;
truelight@2381: 	int dir;
truelight@2381: 
truelight@2381: 	// time out?
truelight@2381: 	if (++p->ai.timeout_counter == 1388) {
truelight@2381: 		p->ai.state = AIS_DELETE_ROAD_BLOCKS;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Currently building a road between two points?
truelight@2381: 	if (p->ai.state_mode != 255) {
truelight@2381: 		AiBuildRoad(p);
truelight@2381: 
truelight@2381: 		// Alternate between edges
truelight@2381: 		swap_tile(&p->ai.start_tile_a, &p->ai.start_tile_b);
truelight@2381: 		swap_tile(&p->ai.cur_tile_a, &p->ai.cur_tile_b);
truelight@2381: 		swap_byte(&p->ai.start_dir_a, &p->ai.start_dir_b);
truelight@2381: 		swap_byte(&p->ai.cur_dir_a, &p->ai.cur_dir_b);
truelight@2381: 
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Now, find two new points to build between
truelight@2381: 	num = p->ai.num_build_rec;
truelight@2381: 	aib = &p->ai.src;
truelight@2381: 
tron@2952: 	for (;;) {
truelight@2381: 		cmd = aib->buildcmd_a;
truelight@2381: 		aib->buildcmd_a = 255;
truelight@2381: 		if (cmd != 255) break;
truelight@2381: 
truelight@2381: 		aib++;
truelight@2381: 		if (--num == 0) {
truelight@2381: 			p->ai.state = AIS_BUILD_ROAD_VEHICLES;
truelight@2381: 			return;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Find first edge to build from.
truelight@2381: 	tile = AiGetRoadBlockEdge(aib->cur_building_rule, aib->use_tile, &dir);
truelight@2381: 	p->ai.start_tile_a = tile;
truelight@2381: 	p->ai.cur_tile_a = tile;
truelight@2381: 	p->ai.start_dir_a = dir;
truelight@2381: 	p->ai.cur_dir_a = dir;
truelight@2381: 
truelight@2381: 	// Find second edge to build to
truelight@2381: 	aib = (&p->ai.src) + (cmd&0xF);
truelight@2381: 	tile = AiGetRoadBlockEdge(aib->cur_building_rule, aib->use_tile, &dir);
truelight@2381: 	p->ai.start_tile_b = tile;
truelight@2381: 	p->ai.cur_tile_b = tile;
truelight@2381: 	p->ai.start_dir_b = dir;
truelight@2381: 	p->ai.cur_dir_b = dir;
truelight@2381: 
truelight@2381: 	// And setup state.
truelight@2381: 	p->ai.state_mode = 2;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: 	p->ai.banned_tile_count = 0;
truelight@2381: }
truelight@2381: 
tron@3315: static StationID AiGetStationIdFromRoadBlock(TileIndex tile, int id)
truelight@2381: {
truelight@2381: 	const AiDefaultBlockData *p = _road_default_block_data[id]->data;
truelight@2381: 	while (p->mode != 1) p++;
tron@3315: 	return GetStationIndex(TILE_ADD(tile, ToTileIndexDiff(p->tileoffs)));
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateBuildRoadVehicles(Player *p)
truelight@2381: {
truelight@2381: 	const AiDefaultBlockData *ptr;
truelight@2381: 	TileIndex tile;
truelight@2381: 	uint loco_id;
tron@2551: 	EngineID veh;
tron@3033: 	uint i;
truelight@2381: 
truelight@2381: 	ptr = _road_default_block_data[p->ai.src.cur_building_rule]->data;
tron@3033: 	for (; ptr->mode != 0; ptr++) {}
truelight@2381: 	tile = TILE_ADD(p->ai.src.use_tile, ToTileIndexDiff(ptr->tileoffs));
truelight@2381: 
truelight@2381: 	veh = AiChooseRoadVehToBuild(p->ai.cargo_type, p->player_money, tile);
tron@2551: 	if (veh == INVALID_ENGINE) {
truelight@2381: 		p->ai.state = AIS_0;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
tron@3491: 	if (CmdFailed(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_ROAD_VEH))) return;
truelight@2381: 
tron@3948: 	loco_id = _new_vehicle_id;
truelight@2381: 
tron@2639: 	for (i = 0; p->ai.order_list_blocks[i] != 0xFF; i++) {
tron@2643: 		const AiBuildRec* aib = &p->ai.src + p->ai.order_list_blocks[i];
tron@2639: 		bool is_pass = (
tron@2639: 			p->ai.cargo_type == CT_PASSENGERS ||
tron@2639: 			p->ai.cargo_type == CT_MAIL ||
tron@2639: 			(_opt.landscape == LT_NORMAL && p->ai.cargo_type == CT_VALUABLES)
tron@2639: 		);
truelight@2381: 		Order order;
truelight@2381: 
truelight@2381: 		order.type = OT_GOTO_STATION;
truelight@2381: 		order.flags = 0;
truelight@2381: 		order.station = AiGetStationIdFromRoadBlock(aib->use_tile, aib->cur_building_rule);
truelight@2381: 
truelight@2381: 		if (!is_pass && i == 1) order.flags |= OF_UNLOAD;
truelight@2381: 		if (p->ai.num_want_fullload != 0 && (is_pass || i == 0))
truelight@2381: 			order.flags |= OF_FULL_LOAD;
truelight@2381: 
tron@3491: 		DoCommand(0, loco_id + (i << 16),	PackOrder(&order), DC_EXEC, CMD_INSERT_ORDER);
truelight@2381: 	}
truelight@2381: 
tron@3491: 	DoCommand(0, loco_id, 0, DC_EXEC, CMD_START_STOP_ROADVEH);
tron@3491: 	DoCommand(0, loco_id, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
truelight@2381: 
tron@2639: 	if (p->ai.num_want_fullload != 0) p->ai.num_want_fullload--;
tron@2639: 	if (--p->ai.num_loco_to_build == 0) p->ai.state = AIS_0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateDeleteRoadBlocks(Player *p)
truelight@2381: {
truelight@2381: 	int num;
truelight@2381: 	AiBuildRec *aib;
truelight@2381: 	const AiDefaultBlockData *b;
truelight@2381: 
truelight@2381: 	num = p->ai.num_build_rec;
truelight@2381: 	aib = &p->ai.src;
truelight@2381: 	do {
truelight@2381: 		if (aib->cur_building_rule != 255) {
truelight@2381: 			b = _road_default_block_data[aib->cur_building_rule]->data;
truelight@2381: 			while (b->mode != 4) {
truelight@2381: 				if (b->mode <= 1) {
tron@3491: 					DoCommand(TILE_ADD(aib->use_tile, ToTileIndexDiff(b->tileoffs)), 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@2381: 				}
truelight@2381: 				b++;
truelight@2381: 			}
truelight@2381: 		}
truelight@2381: 	} while (++aib,--num);
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_0;
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: static void AiStateAirportStuff(Player *p)
truelight@2381: {
truelight@2381: 	Station *st;
truelight@2381: 	byte acc_planes;
truelight@2381: 	int i;
truelight@2381: 	AiBuildRec *aib;
truelight@2381: 	byte rule;
truelight@2381: 
truelight@2381: 	// Here we look for an airport we could use instead of building a new
truelight@2381: 	// one. If we find such an aiport for any waypoint,
truelight@2381: 	// AiStateBuildDefaultAirportBlocks() will kindly skip that one when
truelight@2381: 	// building the waypoints.
truelight@2381: 
truelight@2381: 	i = 0;
truelight@2381: 	do {
truelight@2381: 		// We do this all twice - once for the source (town in the case
truelight@2381: 		// of oilrig route) and then for the destination (oilrig in the
truelight@2381: 		// case of oilrig route).
truelight@2381: 		aib = &p->ai.src + i;
truelight@2381: 
truelight@2381: 		FOR_ALL_STATIONS(st) {
truelight@2381: 			// Dismiss ghost stations.
tron@3033: 			if (st->xy == 0) continue;
truelight@2381: 
truelight@2381: 			// Is this an airport?
tron@3033: 			if (!(st->facilities & FACIL_AIRPORT)) continue;
truelight@2381: 
truelight@2381: 			// Do we own the airport? (Oilrigs aren't owned, though.)
tron@3033: 			if (st->owner != OWNER_NONE && st->owner != _current_player) continue;
truelight@2381: 
truelight@2381: 			acc_planes = GetAirport(st->airport_type)->acc_planes;
truelight@2381: 
truelight@2381: 			// Dismiss heliports, unless we are checking an oilrig.
tron@3033: 			if (acc_planes == HELICOPTERS_ONLY && (p->ai.build_kind != 1 || i != 1))
truelight@2381: 				continue;
truelight@2381: 
truelight@2381: 			// Dismiss country airports if we are doing the other
truelight@2381: 			// endpoint of an oilrig route.
truelight@2381: 			if (acc_planes == AIRCRAFT_ONLY && (p->ai.build_kind == 1 && i == 0))
truelight@2381: 				continue;
truelight@2381: 
truelight@2381: 			// Dismiss airports too far away.
truelight@2381: 			if (DistanceMax(st->airport_tile, aib->spec_tile) > aib->rand_rng)
truelight@2381: 				continue;
truelight@2381: 
truelight@2381: 			// It's ideal airport, let's take it!
truelight@2381: 
truelight@2381: 			/* XXX: This part is utterly broken - rule should
truelight@2381: 			 * contain number of the rule appropriate for the
truelight@2381: 			 * airport type (country, town, ...), see
truelight@2381: 			 * _airport_default_block_data (rule is just an index
truelight@2381: 			 * in this array). But the only difference between the
truelight@2381: 			 * currently existing two rules (rule 0 - town and rule
truelight@2381: 			 * 1 - country) is the attr field which is used only
truelight@2381: 			 * when building new airports - and that's irrelevant
truelight@2381: 			 * for us. So using just about any rule will suffice
truelight@2381: 			 * here for now (some of the new airport types would be
truelight@2381: 			 * broken because they will probably need different
truelight@2381: 			 * tileoff values etc), no matter that
tron@3338: 			 * IsHangarTile() makes no sense. --pasky */
truelight@2381: 			if (acc_planes == HELICOPTERS_ONLY) {
truelight@2381: 				/* Heliports should have maybe own rulesets but
truelight@2381: 				 * OTOH we don't want AI to pick them up when
truelight@2381: 				 * looking for a suitable airport type to build.
truelight@2381: 				 * So any of rules 0 or 1 would do for now. The
truelight@2381: 				 * original rule number was 2 but that's a bug
truelight@2381: 				 * because we have no such rule. */
truelight@2381: 				rule = 1;
truelight@2381: 			} else {
tron@3338: 				rule = IsHangarTile(st->airport_tile);
truelight@2381: 			}
truelight@2381: 
truelight@2381: 			aib->cur_building_rule = rule;
truelight@2381: 			aib->use_tile = st->airport_tile;
truelight@2381: 			break;
truelight@2381: 		}
truelight@2381: 	} while (++i != p->ai.num_build_rec);
truelight@2381: 
truelight@2381: 	p->ai.state = AIS_BUILD_DEFAULT_AIRPORT_BLOCKS;
truelight@2381: 	p->ai.state_mode = 255;
truelight@2381: 	p->ai.state_counter = 0;
truelight@2381: }
truelight@2381: 
truelight@2381: static int32 AiDoBuildDefaultAirportBlock(TileIndex tile, const AiDefaultBlockData *p, byte flag)
truelight@2381: {
truelight@2381: 	int32 total_cost = 0, ret;
truelight@2381: 
tron@3033: 	for (; p->mode == 0; p++) {
tron@3033: 		if (!HASBIT(_avail_aircraft, p->attr)) return CMD_ERROR;
tron@3491: 		ret = DoCommand(TILE_MASK(tile + ToTileIndexDiff(p->tileoffs)), p->attr,0,flag | DC_AUTO | DC_NO_WATER,CMD_BUILD_AIRPORT);
truelight@2381: 		if (CmdFailed(ret)) return CMD_ERROR;
truelight@2381: 		total_cost += ret;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	return total_cost;
truelight@2381: }
truelight@2381: 
truelight@2381: static bool AiCheckAirportResources(TileIndex tile, const AiDefaultBlockData *p, byte cargo)
truelight@2381: {
truelight@2381: 	uint values[NUM_CARGO];
truelight@2381: 	int rad;
truelight@2381: 
truelight@2381: 	if (_patches.modified_catchment) {
truelight@2381: 		rad = CA_AIR_LARGE;		//I Have NFI what airport the
truelight@2381: 	} else {				//AI is going to build here
truelight@2381: 		rad = 4;
truelight@2381: 	}
truelight@2381: 
tron@3033: 	for (; p->mode == 0; p++) {
truelight@2381: 		TileIndex tile2 = TILE_ADD(tile, ToTileIndexDiff(p->tileoffs));
tron@3876: 		const AirportFTAClass* airport = GetAirport(p->attr);
tron@3876: 		uint w = airport->size_x;
tron@3876: 		uint h = airport->size_y;
tron@3033: 
truelight@2381: 		if (cargo & 0x80) {
truelight@2381: 			GetProductionAroundTiles(values, tile2, w, h, rad);
truelight@2381: 			return values[cargo & 0x7F] != 0;
truelight@2381: 		} else {
truelight@2381: 			GetAcceptanceAroundTiles(values, tile2, w, h, rad);
truelight@2381: 			return values[cargo] >= 8;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 	return true;
truelight@2381: }
truelight@2381: 
truelight@2381: static int AiFindBestDefaultAirportBlock(TileIndex tile, byte cargo, byte heli, int32 *cost)
truelight@2381: {
truelight@2381: 	const AiDefaultBlockData *p;
tron@3033: 	uint i;
tron@3033: 
tron@3033: 	for (i = 0; (p = _airport_default_block_data[i]) != NULL; i++) {
truelight@2381: 		// If we are doing a helicopter service, avoid building
truelight@2381: 		// airports where they can't land.
tron@3033: 		if (heli && GetAirport(p->attr)->acc_planes == AIRCRAFT_ONLY) continue;
truelight@2381: 
truelight@2381: 		*cost = AiDoBuildDefaultAirportBlock(tile, p, 0);
peter1138@2737: 		if (!CmdFailed(*cost) && AiCheckAirportResources(tile, p, cargo))
truelight@2381: 			return i;
truelight@2381: 	}
truelight@2381: 	return -1;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateBuildDefaultAirportBlocks(Player *p)
truelight@2381: {
truelight@2381: 	int i, j;
truelight@2381: 	AiBuildRec *aib;
truelight@2381: 	int rule;
truelight@2381: 	int32 cost;
truelight@2381: 
truelight@2381: 	// time out?
truelight@2381: 	if (++p->ai.timeout_counter == 1388) {
truelight@2381: 		p->ai.state = AIS_0;
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// do the following 8 times
truelight@2381: 	i = 8;
truelight@2381: 	do {
truelight@2381: 		// check if we can build the default
truelight@2381: 		aib = &p->ai.src;
truelight@2381: 		j = p->ai.num_build_rec;
truelight@2381: 		do {
truelight@2381: 			// this item has already been built?
tron@3033: 			if (aib->cur_building_rule != 255) continue;
truelight@2381: 
truelight@2381: 			// adjust the coordinate randomly,
truelight@2381: 			// to make sure that we find a position.
truelight@2381: 			aib->use_tile = AdjustTileCoordRandomly(aib->spec_tile, aib->rand_rng);
truelight@2381: 
truelight@2381: 			// check if the aircraft stuff can be built there.
truelight@2381: 			rule = AiFindBestDefaultAirportBlock(aib->use_tile, aib->cargo, p->ai.build_kind, &cost);
truelight@2381: 
truelight@2381: //			SetRedErrorSquare(aib->use_tile);
truelight@2381: 
truelight@2381: 			if (rule == -1) {
truelight@2381: 				// cannot build, terraform after a while
truelight@2381: 				if (p->ai.state_counter >= 600) {
truelight@2381: 					AiDoTerraformLand(aib->use_tile, Random()&3, 3, (int8)p->ai.state_mode);
truelight@2381: 				}
truelight@2381: 				// also try the other terraform direction
truelight@2381: 				if (++p->ai.state_counter >= 1000) {
truelight@2381: 					p->ai.state_counter = 0;
truelight@2381: 					p->ai.state_mode = -p->ai.state_mode;
truelight@2381: 				}
truelight@2381: 			} else if (CheckPlayerHasMoney(cost) && AiCheckBlockDistances(p,aib->use_tile)) {
truelight@2381: 				// player has money, build it.
truelight@2381: 				int32 r;
truelight@2381: 
truelight@2381: 				aib->cur_building_rule = rule;
truelight@2381: 
truelight@2381: 				r = AiDoBuildDefaultAirportBlock(
truelight@2381: 					aib->use_tile,
truelight@2381: 					_airport_default_block_data[rule],
truelight@2381: 					DC_EXEC | DC_NO_TOWN_RATING
truelight@2381: 				);
peter1138@2737: 				assert(!CmdFailed(r));
truelight@2381: 			}
truelight@2381: 		} while (++aib,--j);
truelight@2381: 	} while (--i);
truelight@2381: 
truelight@2381: 	// check if we're done with all of them
truelight@2381: 	aib = &p->ai.src;
truelight@2381: 	j = p->ai.num_build_rec;
truelight@2381: 	do {
tron@3033: 		if (aib->cur_building_rule == 255) return;
truelight@2381: 	} while (++aib,--j);
truelight@2381: 
truelight@2381: 	// yep, all are done. switch state.
truelight@2381: 	p->ai.state = AIS_BUILD_AIRCRAFT_VEHICLES;
truelight@2381: }
truelight@2381: 
tron@3315: static StationID AiGetStationIdFromAircraftBlock(TileIndex tile, int id)
truelight@2381: {
truelight@2381: 	const AiDefaultBlockData *p = _airport_default_block_data[id];
truelight@2381: 	while (p->mode != 1) p++;
tron@3315: 	return GetStationIndex(TILE_ADD(tile, ToTileIndexDiff(p->tileoffs)));
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateBuildAircraftVehicles(Player *p)
truelight@2381: {
truelight@2381: 	const AiDefaultBlockData *ptr;
truelight@2381: 	TileIndex tile;
tron@2544: 	EngineID veh;
truelight@2381: 	int i;
truelight@2381: 	uint loco_id;
truelight@2381: 
truelight@2381: 	ptr = _airport_default_block_data[p->ai.src.cur_building_rule];
tron@2952: 	for (;ptr->mode!=0;ptr++) {}
truelight@2381: 
truelight@2381: 	tile = TILE_ADD(p->ai.src.use_tile, ToTileIndexDiff(ptr->tileoffs));
truelight@2381: 
truelight@2381: 	veh = AiChooseAircraftToBuild(p->player_money, p->ai.build_kind!=0 ? 1 : 0);
tron@2544: 	if (veh == INVALID_ENGINE) return;
Darkvater@2423: 
Darkvater@2423: 	/* XXX - Have the AI pick the hangar terminal in an airport. Eg get airport-type
Darkvater@2423: 	 * and offset to the FIRST depot because the AI picks the st->xy tile */
tron@3315: 	tile += ToTileIndexDiff(GetAirport(GetStationByTile(tile)->airport_type)->airport_depots[0]);
tron@3491: 	if (CmdFailed(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_AIRCRAFT))) return;
tron@3948: 	loco_id = _new_vehicle_id;
truelight@2381: 
tron@2952: 	for (i=0; p->ai.order_list_blocks[i] != 0xFF; i++) {
truelight@2381: 		AiBuildRec *aib = (&p->ai.src) + p->ai.order_list_blocks[i];
truelight@2381: 		bool is_pass = (p->ai.cargo_type == CT_PASSENGERS || p->ai.cargo_type == CT_MAIL);
truelight@2381: 		Order order;
truelight@2381: 
truelight@2381: 		order.type = OT_GOTO_STATION;
truelight@2381: 		order.flags = 0;
truelight@2381: 		order.station = AiGetStationIdFromAircraftBlock(aib->use_tile, aib->cur_building_rule);
truelight@2381: 
truelight@2381: 		if (!is_pass && i == 1) order.flags |= OF_UNLOAD;
truelight@2381: 		if (p->ai.num_want_fullload != 0 && (is_pass || i == 0))
truelight@2381: 			order.flags |= OF_FULL_LOAD;
truelight@2381: 
tron@3491: 		DoCommand(0, loco_id + (i << 16), PackOrder(&order), DC_EXEC, CMD_INSERT_ORDER);
truelight@2381: 	}
truelight@2381: 
tron@3491: 	DoCommand(0, loco_id, 0, DC_EXEC, CMD_START_STOP_AIRCRAFT);
tron@3491: 
tron@3491: 	DoCommand(0, loco_id, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
truelight@2381: 
tron@3033: 	if (p->ai.num_want_fullload != 0) p->ai.num_want_fullload--;
tron@3033: 
tron@3033: 	if (--p->ai.num_loco_to_build == 0) p->ai.state = AIS_0;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateCheckShipStuff(Player *p)
truelight@2381: {
truelight@2381: 	// XXX
truelight@2381: 	error("!AiStateCheckShipStuff");
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateBuildDefaultShipBlocks(Player *p)
truelight@2381: {
truelight@2381: 	// XXX
truelight@2381: 	error("!AiStateBuildDefaultShipBlocks");
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateDoShipStuff(Player *p)
truelight@2381: {
truelight@2381: 	// XXX
truelight@2381: 	error("!AiStateDoShipStuff");
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateSellVeh(Player *p)
truelight@2381: {
truelight@2381: 	Vehicle *v = p->ai.cur_veh;
truelight@2381: 
truelight@2381: 	if (v->owner == _current_player) {
truelight@2381: 		if (v->type == VEH_Train) {
truelight@2381: 
truelight@2381: 			if (!IsTileDepotType(v->tile, TRANSPORT_RAIL) || v->u.rail.track != 0x80 || !(v->vehstatus&VS_STOPPED)) {
truelight@2381: 				if (v->current_order.type != OT_GOTO_DEPOT)
tron@3491: 					DoCommand(0, v->index, 0, DC_EXEC, CMD_TRAIN_GOTO_DEPOT);
truelight@2381: 				goto going_to_depot;
truelight@2381: 			}
truelight@2381: 
truelight@2381: 			// Sell whole train
tron@3491: 			DoCommand(v->tile, v->index, 1, DC_EXEC, CMD_SELL_RAIL_WAGON);
truelight@2381: 
truelight@2381: 		} else if (v->type == VEH_Road) {
tron@3964: 			if (!IsRoadVehInDepotStopped(v)) {
truelight@2381: 				if (v->current_order.type != OT_GOTO_DEPOT)
tron@3491: 					DoCommand(0, v->index, 0, DC_EXEC, CMD_SEND_ROADVEH_TO_DEPOT);
truelight@2381: 				goto going_to_depot;
truelight@2381: 			}
truelight@2381: 
tron@3491: 			DoCommand(0, v->index, 0, DC_EXEC, CMD_SELL_ROAD_VEH);
truelight@2381: 		} else if (v->type == VEH_Aircraft) {
tron@3964: 			if (!IsAircraftInHangarStopped(v)) {
truelight@2381: 				if (v->current_order.type != OT_GOTO_DEPOT)
tron@3491: 					DoCommand(0, v->index, 0, DC_EXEC, CMD_SEND_AIRCRAFT_TO_HANGAR);
truelight@2381: 				goto going_to_depot;
truelight@2381: 			}
truelight@2381: 
tron@3491: 			DoCommand(0, v->index, 0, DC_EXEC, CMD_SELL_AIRCRAFT);
truelight@2381: 			} else if (v->type == VEH_Ship) {
truelight@2381: 			// XXX: not implemented
truelight@2381: 			error("!v->type == VEH_Ship");
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	goto return_to_loop;
truelight@2381: going_to_depot:;
tron@3033: 	if (++p->ai.state_counter <= 832) return;
truelight@2381: 
truelight@2381: 	if (v->current_order.type == OT_GOTO_DEPOT) {
truelight@2381: 		v->current_order.type = OT_DUMMY;
truelight@2381: 		v->current_order.flags = 0;
truelight@2381: 		InvalidateWindow(WC_VEHICLE_VIEW, v->index);
truelight@2381: 	}
truelight@2381: return_to_loop:;
truelight@2381: 	p->ai.state = AIS_VEH_LOOP;
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateRemoveStation(Player *p)
truelight@2381: {
truelight@2381: 	// Remove stations that aren't in use by any vehicle
truelight@2381: 	byte *in_use;
truelight@2381: 	const byte *used;
truelight@2381: 	const Order *ord;
truelight@2381: 	const Station *st;
truelight@2381: 	TileIndex tile;
truelight@2381: 
truelight@2381: 	// Go to this state when we're done.
truelight@2381: 	p->ai.state = AIS_1;
truelight@2381: 
truelight@2381: 	// Get a list of all stations that are in use by a vehicle
truelight@2381: 	in_use = malloc(GetStationPoolSize());
truelight@2381: 	memset(in_use, 0, GetStationPoolSize());
truelight@2381: 	FOR_ALL_ORDERS(ord) {
tron@3033: 		if (ord->type == OT_GOTO_STATION) in_use[ord->station] = 1;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Go through all stations and delete those that aren't in use
truelight@2381: 	used = in_use;
truelight@2381: 	FOR_ALL_STATIONS(st) {
truelight@2381: 		if (st->xy != 0 && st->owner == _current_player && !*used &&
truelight@2381: 				( (st->bus_stops != NULL && (tile = st->bus_stops->xy) != 0) ||
truelight@2381: 					(st->truck_stops != NULL && (tile = st->truck_stops->xy)) != 0 ||
truelight@2381: 					(tile = st->train_tile) != 0 ||
truelight@2381: 					(tile = st->dock_tile) != 0 ||
truelight@2381: 					(tile = st->airport_tile) != 0)) {
tron@3491: 			DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@2381: 		}
truelight@2381: 		used++;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	free(in_use);
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiRemovePlayerRailOrRoad(Player *p, TileIndex tile)
truelight@2381: {
tron@3269: 	TrackBits rails;
truelight@2381: 
truelight@2381: 	if (IsTileType(tile, MP_RAILWAY)) {
truelight@2381: 		if (!IsTileOwner(tile, _current_player)) return;
truelight@2381: 
tron@3269: 		if (IsPlainRailTile(tile)) {
truelight@2381: is_rail_crossing:;
tron@3269: 			rails = GetRailTrackStatus(tile);
tron@3269: 
tron@3269: 			if (rails == TRACK_BIT_HORZ || rails == TRACK_BIT_VERT) return;
tron@3269: 
tron@3269: 			if (rails & TRACK_BIT_3WAY_NE) {
truelight@2381: pos_0:
tron@3269: 				if ((GetRailTrackStatus(TILE_MASK(tile - TileDiffXY(1, 0))) & TRACK_BIT_3WAY_SW) == 0) {
truelight@2381: 					p->ai.cur_dir_a = 0;
truelight@2381: 					p->ai.cur_tile_a = tile;
truelight@2381: 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
truelight@2381: 					return;
truelight@2381: 				}
truelight@2381: 			}
truelight@2381: 
tron@3269: 			if (rails & TRACK_BIT_3WAY_SE) {
truelight@2381: pos_1:
tron@3269: 				if ((GetRailTrackStatus(TILE_MASK(tile + TileDiffXY(0, 1))) & TRACK_BIT_3WAY_NW) == 0) {
truelight@2381: 					p->ai.cur_dir_a = 1;
truelight@2381: 					p->ai.cur_tile_a = tile;
truelight@2381: 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
truelight@2381: 					return;
truelight@2381: 				}
truelight@2381: 			}
truelight@2381: 
tron@3269: 			if (rails & TRACK_BIT_3WAY_SW) {
truelight@2381: pos_2:
tron@3269: 				if ((GetRailTrackStatus(TILE_MASK(tile + TileDiffXY(1, 0))) & TRACK_BIT_3WAY_NE) == 0) {
truelight@2381: 					p->ai.cur_dir_a = 2;
truelight@2381: 					p->ai.cur_tile_a = tile;
truelight@2381: 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
truelight@2381: 					return;
truelight@2381: 				}
truelight@2381: 			}
truelight@2381: 
tron@3269: 			if (rails & TRACK_BIT_3WAY_NW) {
truelight@2381: pos_3:
tron@3269: 				if ((GetRailTrackStatus(TILE_MASK(tile - TileDiffXY(0, 1))) & TRACK_BIT_3WAY_SE) == 0) {
truelight@2381: 					p->ai.cur_dir_a = 3;
truelight@2381: 					p->ai.cur_tile_a = tile;
truelight@2381: 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
truelight@2381: 					return;
truelight@2381: 				}
truelight@2381: 			}
truelight@2381: 		} else {
truelight@2381: 			static const byte _depot_bits[] = {0x19,0x16,0x25,0x2A};
truelight@2381: 
tron@3185: 			DiagDirection dir = GetRailDepotDirection(tile);
tron@3185: 
tron@3185: 			if (GetRailTrackStatus(tile + TileOffsByDir(dir)) & _depot_bits[dir])
truelight@2381: 				return;
truelight@2381: 
tron@3491: 			DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@2381: 		}
truelight@2381: 	} else if (IsTileType(tile, MP_STREET)) {
truelight@2381: 		if (!IsTileOwner(tile, _current_player)) return;
truelight@2381: 
tron@3033: 		if (IsLevelCrossing(tile)) goto is_rail_crossing;
tron@3033: 
rubidium@3793: 		if (GetRoadTileType(tile) == ROAD_TILE_DEPOT) {
tron@3153: 			DiagDirection dir;
truelight@2381: 
truelight@2381: 			// Check if there are any stations around.
truelight@2381: 			if (IsTileType(tile + TileDiffXY(-1, 0), MP_STATION) &&
tron@3033: 					IsTileOwner(tile + TileDiffXY(-1, 0), _current_player)) {
tron@3033: 				return;
tron@3033: 			}
truelight@2381: 
truelight@2381: 			if (IsTileType(tile + TileDiffXY(1, 0), MP_STATION) &&
tron@3033: 					IsTileOwner(tile + TileDiffXY(1, 0), _current_player)) {
tron@3033: 				return;
tron@3033: 			}
truelight@2381: 
truelight@2381: 			if (IsTileType(tile + TileDiffXY(0, -1), MP_STATION) &&
tron@3033: 					IsTileOwner(tile + TileDiffXY(0, -1), _current_player)) {
tron@3033: 				return;
tron@3033: 			}
truelight@2381: 
truelight@2381: 			if (IsTileType(tile + TileDiffXY(0, 1), MP_STATION) &&
tron@3033: 					IsTileOwner(tile + TileDiffXY(0, 1), _current_player)) {
tron@3033: 				return;
tron@3033: 			}
truelight@2381: 
tron@3179: 			dir = GetRoadDepotDirection(tile);
truelight@2381: 
tron@3491: 			DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
tron@3491: 			DoCommand(
truelight@2381: 				TILE_MASK(tile + TileOffsByDir(dir)),
tron@3153: 				DiagDirToRoadBits(ReverseDiagDir(dir)),
truelight@2381: 				0,
truelight@2381: 				DC_EXEC,
truelight@2381: 				CMD_REMOVE_ROAD);
truelight@2381: 		}
truelight@2381: 	} else if (IsTileType(tile, MP_TUNNELBRIDGE)) {
tron@3234: 		if (!IsTileOwner(tile, _current_player) ||
tron@3234: 				!IsBridge(tile) ||
tron@3234: 				GetBridgeTransportType(tile) != TRANSPORT_RAIL) {
truelight@2381: 			return;
tron@3234: 		}
truelight@2381: 
tron@3269: 		rails = 0;
truelight@2381: 
tron@3196: 		switch (GetBridgeRampDirection(tile)) {
tron@3196: 			default:
tron@3196: 			case DIAGDIR_NE: goto pos_2;
tron@3196: 			case DIAGDIR_SE: goto pos_3;
tron@3196: 			case DIAGDIR_SW: goto pos_0;
tron@3196: 			case DIAGDIR_NW: goto pos_1;
tron@3196: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateRemoveTrack(Player *p)
truelight@2381: {
truelight@2381: 	/* Was 1000 for standard 8x8 maps. */
truelight@2381: 	int num = MapSizeX() * 4;
truelight@2381: 
truelight@2381: 	do {
truelight@2381: 		TileIndex tile = ++p->ai.state_counter;
truelight@2381: 
truelight@2381: 		// Iterated all tiles?
truelight@2381: 		if (tile >= MapSize()) {
truelight@2381: 			p->ai.state = AIS_REMOVE_STATION;
truelight@2381: 			return;
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		// Remove player stuff in that tile
truelight@2381: 		AiRemovePlayerRailOrRoad(p, tile);
tron@3033: 		if (p->ai.state != AIS_REMOVE_TRACK) return;
truelight@2381: 	} while (--num);
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiStateRemoveSingleRailTile(Player *p)
truelight@2381: {
truelight@2381: 	// Remove until we can't remove more.
tron@3033: 	if (!AiRemoveTileAndGoForward(p)) p->ai.state = AIS_REMOVE_TRACK;
truelight@2381: }
truelight@2381: 
truelight@2381: static AiStateAction * const _ai_actions[] = {
truelight@2381: 	AiCase0,
truelight@2381: 	AiCase1,
truelight@2381: 	AiStateVehLoop,
truelight@2381: 	AiStateCheckReplaceVehicle,
truelight@2381: 	AiStateDoReplaceVehicle,
truelight@2381: 	AiStateWantNewRoute,
truelight@2381: 
truelight@2381: 	AiStateBuildDefaultRailBlocks,
truelight@2381: 	AiStateBuildRail,
truelight@2381: 	AiStateBuildRailVeh,
truelight@2381: 	AiStateDeleteRailBlocks,
truelight@2381: 
truelight@2381: 	AiStateBuildDefaultRoadBlocks,
truelight@2381: 	AiStateBuildRoad,
truelight@2381: 	AiStateBuildRoadVehicles,
truelight@2381: 	AiStateDeleteRoadBlocks,
truelight@2381: 
truelight@2381: 	AiStateAirportStuff,
truelight@2381: 	AiStateBuildDefaultAirportBlocks,
truelight@2381: 	AiStateBuildAircraftVehicles,
truelight@2381: 
truelight@2381: 	AiStateCheckShipStuff,
truelight@2381: 	AiStateBuildDefaultShipBlocks,
truelight@2381: 	AiStateDoShipStuff,
truelight@2381: 
truelight@2381: 	AiStateSellVeh,
truelight@2381: 	AiStateRemoveStation,
truelight@2381: 	AiStateRemoveTrack,
truelight@2381: 
truelight@2381: 	AiStateRemoveSingleRailTile
truelight@2381: };
truelight@2381: 
truelight@2381: extern void ShowBuyCompanyDialog(uint player);
truelight@2381: 
truelight@2381: static void AiHandleTakeover(Player *p)
truelight@2381: {
truelight@2381: 	if (p->bankrupt_timeout != 0) {
tron@3033: 		p->bankrupt_timeout -= 8;
tron@3033: 		if (p->bankrupt_timeout > 0) return;
truelight@2381: 		p->bankrupt_timeout = 0;
truelight@2381: 		DeleteWindowById(WC_BUY_COMPANY, _current_player);
Darkvater@2425: 		if (IsLocalPlayer()) {
truelight@2381: 			AskExitToGameMenu();
truelight@2381: 			return;
truelight@2381: 		}
tron@3033: 		if (IS_HUMAN_PLAYER(_current_player)) return;
truelight@2381: 	}
truelight@2381: 
tron@3033: 	if (p->bankrupt_asked == 255) return;
truelight@2381: 
truelight@2381: 	{
truelight@2381: 		uint asked = p->bankrupt_asked;
truelight@2381: 		Player *pp, *best_pl = NULL;
truelight@2381: 		int32 best_val = -1;
truelight@2381: 		uint old_p;
truelight@2381: 
truelight@2381: 		// Ask the guy with the highest performance hist.
truelight@2381: 		FOR_ALL_PLAYERS(pp) {
truelight@2381: 			if (pp->is_active &&
truelight@2381: 					!(asked&1) &&
truelight@2381: 					pp->bankrupt_asked == 0 &&
truelight@2381: 					best_val < pp->old_economy[1].performance_history) {
truelight@2381: 				best_val = pp->old_economy[1].performance_history;
truelight@2381: 				best_pl = pp;
truelight@2381: 			}
truelight@2381: 			asked>>=1;
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		// Asked all players?
truelight@2381: 		if (best_val == -1) {
truelight@2381: 			p->bankrupt_asked = 255;
truelight@2381: 			return;
truelight@2381: 		}
truelight@2381: 
truelight@2381: 		SETBIT(p->bankrupt_asked, best_pl->index);
truelight@2381: 
truelight@2381: 		if (best_pl->index == _local_player) {
truelight@2381: 			p->bankrupt_timeout = 4440;
truelight@2381: 			ShowBuyCompanyDialog(_current_player);
truelight@2381: 			return;
truelight@2381: 		}
tron@3033: 		if (IS_HUMAN_PLAYER(best_pl->index)) return;
truelight@2381: 
truelight@2381: 		// Too little money for computer to buy it?
truelight@2381: 		if (best_pl->player_money >> 1 >= p->bankrupt_value) {
truelight@2381: 			// Computer wants to buy it.
truelight@2381: 			old_p = _current_player;
truelight@2381: 			_current_player = p->index;
tron@3491: 			DoCommand(0, old_p, 0, DC_EXEC, CMD_BUY_COMPANY);
truelight@2381: 			_current_player = old_p;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiAdjustLoan(Player *p)
truelight@2381: {
truelight@2381: 	int32 base = AiGetBasePrice(p);
truelight@2381: 
truelight@2381: 	if (p->player_money > base * 1400) {
truelight@2381: 		// Decrease loan
truelight@2381: 		if (p->current_loan != 0) {
tron@3491: 			DoCommand(0, 0, 0, DC_EXEC, CMD_DECREASE_LOAN);
truelight@2381: 		}
truelight@2381: 	} else if (p->player_money < base * 500) {
truelight@2381: 		// Increase loan
truelight@2381: 		if (p->current_loan < _economy.max_loan &&
truelight@2381: 				p->num_valid_stat_ent >= 2 &&
truelight@2381: 				-(p->old_economy[0].expenses+p->old_economy[1].expenses) < base * 60) {
tron@3491: 			DoCommand(0, 0, 0, DC_EXEC, CMD_INCREASE_LOAN);
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: static void AiBuildCompanyHQ(Player *p)
truelight@2381: {
truelight@2381: 	TileIndex tile;
truelight@2381: 
truelight@2381: 	if (p->location_of_house == 0 &&
truelight@2381: 			p->last_build_coordinate != 0) {
truelight@2381: 		tile = AdjustTileCoordRandomly(p->last_build_coordinate, 8);
tron@3491: 		DoCommand(tile, 0, 0, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_BUILD_COMPANY_HQ);
truelight@2381: 	}
truelight@2381: }
truelight@2381: 
truelight@2381: 
truelight@2381: void AiDoGameLoop(Player *p)
truelight@2381: {
truelight@2381: 	if (p->bankrupt_asked != 0) {
truelight@2381: 		AiHandleTakeover(p);
truelight@2381: 		return;
truelight@2381: 	}
truelight@2381: 
truelight@2381: 	// Ugly hack to make sure the service interval of the AI is good, not looking
truelight@2381: 	//  to the patch-setting
truelight@2381: 	// Also, it takes into account the setting if the service-interval is in days
truelight@2381: 	//  or in %
truelight@2381: 	_ai_service_interval = _patches.servint_ispercent?80:180;
truelight@2381: 
truelight@2381: 	if (IS_HUMAN_PLAYER(_current_player))
truelight@2381: 		return;
truelight@2381: 
truelight@2381: 	AiAdjustLoan(p);
truelight@2381: 	AiBuildCompanyHQ(p);
truelight@2381: 
truelight@2381: #if 0
truelight@2381: 	{
truelight@2381: 		static byte old_state = 99;
truelight@2381: 		static bool hasdots = false;
truelight@2381: 		char *_ai_state_names[]={
truelight@2381: 			"AiCase0",
truelight@2381: 			"AiCase1",
truelight@2381: 			"AiStateVehLoop",
truelight@2381: 			"AiStateCheckReplaceVehicle",
truelight@2381: 			"AiStateDoReplaceVehicle",
truelight@2381: 			"AiStateWantNewRoute",
truelight@2381: 			"AiStateBuildDefaultRailBlocks",
truelight@2381: 			"AiStateBuildRail",
truelight@2381: 			"AiStateBuildRailVeh",
truelight@2381: 			"AiStateDeleteRailBlocks",
truelight@2381: 			"AiStateBuildDefaultRoadBlocks",
truelight@2381: 			"AiStateBuildRoad",
truelight@2381: 			"AiStateBuildRoadVehicles",
truelight@2381: 			"AiStateDeleteRoadBlocks",
truelight@2381: 			"AiStateAirportStuff",
truelight@2381: 			"AiStateBuildDefaultAirportBlocks",
truelight@2381: 			"AiStateBuildAircraftVehicles",
truelight@2381: 			"AiStateCheckShipStuff",
truelight@2381: 			"AiStateBuildDefaultShipBlocks",
truelight@2381: 			"AiStateDoShipStuff",
truelight@2381: 			"AiStateSellVeh",
truelight@2381: 			"AiStateRemoveStation",
truelight@2381: 			"AiStateRemoveTrack",
truelight@2381: 			"AiStateRemoveSingleRailTile"
truelight@2381: 		};
truelight@2381: 
truelight@2381: 		if (p->ai.state != old_state) {
truelight@2381: 			if (hasdots)
truelight@2381: 				printf("\n");
truelight@2381: 			hasdots=false;
truelight@2381: 			printf("AiState: %s\n", _ai_state_names[old_state=p->ai.state]);
truelight@2381: 		} else {
truelight@2381: 			printf(".");
truelight@2381: 			hasdots=true;
truelight@2381: 		}
truelight@2381: 	}
truelight@2381: #endif
truelight@2381: 
truelight@2381: 	_ai_actions[p->ai.state](p);
truelight@2381: }