truelight@0: #include "stdafx.h"
truelight@0: #include "ttd.h"
truelight@0: #include "player.h"
truelight@0: #include "vehicle.h"
truelight@0: #include "engine.h"
truelight@0: #include "command.h"
truelight@0: #include "town.h"
truelight@0: #include "industry.h"
truelight@0: #include "station.h"
truelight@0: #include "pathfind.h"
truelight@0: #include "economy.h"
truelight@0: #include "airport.h"
truelight@0: 
truelight@0: // remove some day perhaps?
truelight@0: static Player *_cur_ai_player;
truelight@0: 
truelight@0: typedef void AiStateAction(Player *p);
truelight@0: 
truelight@0: enum {
truelight@0: 	AIS_0 = 0,
truelight@0: 	AIS_1 = 1,
truelight@0: 	AIS_VEH_LOOP = 2,
truelight@0: 	AIS_VEH_CHECK_REPLACE_VEHICLE = 3,
truelight@0: 	AIS_VEH_DO_REPLACE_VEHICLE = 4,
truelight@0: 	AIS_WANT_NEW_ROUTE = 5,
truelight@0: 	AIS_BUILD_DEFAULT_RAIL_BLOCKS = 6,
truelight@0: 	AIS_BUILD_RAIL = 7,
truelight@0: 	AIS_BUILD_RAIL_VEH = 8,
truelight@0: 	AIS_DELETE_RAIL_BLOCKS = 9,
truelight@0: 	AIS_BUILD_DEFAULT_ROAD_BLOCKS = 10,
truelight@0: 	AIS_BUILD_ROAD = 11,
truelight@0: 	AIS_BUILD_ROAD_VEHICLES = 12,
truelight@0: 	AIS_DELETE_ROAD_BLOCKS = 13,
truelight@0: 	AIS_AIRPORT_STUFF = 14,
truelight@0: 	AIS_BUILD_DEFAULT_AIRPORT_BLOCKS = 15,
truelight@0: 	AIS_BUILD_AIRCRAFT_VEHICLES = 16,
truelight@0: 	AIS_CHECK_SHIP_STUFF = 17,
truelight@0: 	AIS_BUILD_DEFAULT_SHIP_BLOCKS = 18,
truelight@0: 	AIS_DO_SHIP_STUFF = 19,
truelight@0: 	AIS_SELL_VEHICLE = 20,
truelight@0: 	AIS_REMOVE_STATION = 21,
truelight@0: 	AIS_REMOVE_TRACK = 22,
truelight@0: 	AIS_REMOVE_SINGLE_RAIL_TILE = 23
truelight@0: };
truelight@0: 
truelight@0: 
truelight@0: #include "table/ai_rail.h"
truelight@0: 
truelight@0: static byte GetRailTrackStatus(TileIndex tile) {
truelight@0: 	uint32 r = GetTileTrackStatus(tile, 0);
truelight@0: 	return (byte) (r | r >> 8);
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static void AiCase0(Player *p)
truelight@0: {
truelight@0: 	p->ai.state = AIS_REMOVE_TRACK;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiCase1(Player *p)
truelight@0: {
truelight@0: 	p->ai.cur_veh = NULL;
truelight@0: 	p->ai.state = AIS_VEH_LOOP;
truelight@0: }
truelight@0: 
truelight@0: static void AiStateVehLoop(Player *p)
truelight@0: {
truelight@0: 	Vehicle *v;
truelight@0: 	
truelight@0: 	v = p->ai.cur_veh == NULL ? _vehicles : p->ai.cur_veh+1;
truelight@0: 
truelight@0: 	for (;v != endof(_vehicles); v++) {
truelight@0: 		if (v->type == 0 || v->owner != _current_player)
truelight@0: 			continue;
truelight@0: 
truelight@0: 		if ((v->type == VEH_Train && v->subtype==0) ||
truelight@0: 				v->type == VEH_Road ||
truelight@0: 				(v->type == VEH_Aircraft && v->subtype <= 2) ||
truelight@0: 				v->type == VEH_Ship) {
truelight@0: 			
truelight@0: 			/* replace engine? */
truelight@0: 			if (v->type == VEH_Train && v->engine_type < 3 &&
truelight@0: 					(_price.build_railvehicle >> 3) < p->player_money) {
truelight@0: 				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;
truelight@0: 				p->ai.cur_veh = v;
truelight@0: 				return;
truelight@0: 			}
truelight@0: 
truelight@0: 			/* not profitable? */
truelight@0: 			if (v->age >= 730 &&
truelight@0: 					v->profit_last_year < _price.station_value*5 &&
truelight@0: 					v->profit_this_year < _price.station_value*5) {
truelight@0: 				p->ai.state_counter = 0;
truelight@0: 				p->ai.state = AIS_SELL_VEHICLE;
truelight@0: 				p->ai.cur_veh = v;
truelight@0: 				return;
truelight@0: 			}
truelight@0: 
truelight@0: 			/* not reliable? */
truelight@0: 			if ((v->age != 0 &&
truelight@0: 					_engines[v->engine_type].reliability < 35389) ||
truelight@0: 					v->age >= v->max_age) {
truelight@0: 				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;
truelight@0: 				p->ai.cur_veh = v;
truelight@0: 				return;
truelight@0: 			}
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	p->ai.state = AIS_WANT_NEW_ROUTE;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: // XXX
truelight@0: static const byte _rail_locos_count[3] = {
truelight@0: 	27, 3, 5		
truelight@0: };
truelight@0: extern const byte _rail_engines_start[3];
truelight@0: 
truelight@0: static int AiChooseTrainToBuild(byte railtype, int32 money, byte flag)
truelight@0: {
truelight@0: 	int best_veh_index = -1;
truelight@0: 	byte best_veh_score = 0;
truelight@0: 	int32 r;
truelight@0: 
truelight@0: 	int i = _rail_engines_start[railtype];
truelight@0: 	int end = i + _rail_locos_count[railtype];
truelight@0: 	Engine *e = &_engines[i];
truelight@0: 	do {
truelight@0: 		assert(!(_rail_vehicle_info[i].flags & RVI_WAGON));
truelight@0: 		
truelight@0: 		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D)
truelight@0: 			continue;
truelight@0: 
truelight@0: 		r = DoCommandByTile(0, i, 0, 0, CMD_BUILD_RAIL_VEHICLE);
truelight@0: 		if (r != CMD_ERROR && 
truelight@0: 					(!(_cmd_build_rail_veh_var1&1) || !(flag&1)) && 
truelight@0: 					r <= money && 
truelight@0: 				_cmd_build_rail_veh_score >= best_veh_score) {
truelight@0: 			best_veh_score = _cmd_build_rail_veh_score;
truelight@0: 			best_veh_index = i;
truelight@0: 		}
truelight@0: 	} while (++e, ++i != end);
truelight@0: 
truelight@0: 	return best_veh_index;
truelight@0: }
truelight@0: 
truelight@0: static int AiChooseRoadVehToBuild(byte cargo, int32 money)
truelight@0: {
truelight@0: 	int best_veh_index = -1;
truelight@0: 	int32 best_veh_cost = 0;
truelight@0: 	int32 r;
truelight@0: 
truelight@0: 	int i = _cargoc.ai_roadveh_start[cargo];
truelight@0: 	int end = i + _cargoc.ai_roadveh_count[cargo];
truelight@0: 	Engine *e = &_engines[i];
truelight@0: 	do {
truelight@0: 		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D)
truelight@0: 			continue;
truelight@0: 
truelight@0: 		r = DoCommandByTile(0, i, 0, 0, CMD_BUILD_ROAD_VEH);
truelight@0: 		if (r != CMD_ERROR && r <= money && r >= best_veh_cost) {
truelight@0: 			best_veh_cost = r;
truelight@0: 			best_veh_index = i;
truelight@0: 		}
truelight@0: 	} while (++e, ++i != end);
truelight@0: 
truelight@0: 	return best_veh_index;
truelight@0: }
truelight@0: 
truelight@0: static int AiChooseAircraftToBuild(int32 money, byte flag)
truelight@0: {
truelight@0: 	int best_veh_index = -1;
truelight@0: 	int32 best_veh_cost = 0;
truelight@0: 	int32 r;
truelight@0: 
truelight@0: 	int i = AIRCRAFT_ENGINES_INDEX;
truelight@0: 	int end = i + NUM_AIRCRAFT_ENGINES;
truelight@0: 	Engine *e = &_engines[i];
truelight@0: 	do {
truelight@0: 		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D)
truelight@0: 			continue;
truelight@0: 
truelight@0: 		if (flag&1) {
truelight@0: 			if (i<253) continue;
truelight@0: 		} else {
truelight@0: 			if (i>=253) continue;
truelight@0: 		}
truelight@0: 
truelight@0: 		r = DoCommandByTile(0, i, 0, 0, CMD_BUILD_AIRCRAFT);
truelight@0: 		if (r != CMD_ERROR && r <= money && r >= best_veh_cost) {
truelight@0: 			best_veh_cost = r;
truelight@0: 			best_veh_index = i;
truelight@0: 		}
truelight@0: 	} while (++e, ++i != end);
truelight@0: 
truelight@0: 	return best_veh_index;
truelight@0: }
truelight@0: 
truelight@0: static int32 AiGetBasePrice(Player *p)
truelight@0: {
truelight@0: 	int32 base = _price.station_value;
truelight@0: 
truelight@0: 	// adjust base price when more expensive vehicles are available
truelight@0: 	if (p->ai.railtype_to_use == 1) base = (base * 3) >> 1;
truelight@0: 	else if (p->ai.railtype_to_use == 2) base *= 2;
truelight@0: 	
truelight@0: 	return base;
truelight@0: }
truelight@0: 
truelight@0: #if 0
truelight@0: static int AiChooseShipToBuild(byte cargo, int32 money)
truelight@0: {
truelight@0: 	// XXX: not done
truelight@0: 	return 0;
truelight@0: }
truelight@0: #endif
truelight@0: 
truelight@0: static int AiChooseRoadVehToReplaceWith(Player *p, Vehicle *v)
truelight@0: {
truelight@0: 	int32 avail_money = p->player_money + v->value;
truelight@0: 	return AiChooseRoadVehToBuild(v->cargo_type, avail_money);
truelight@0: }
truelight@0: 
truelight@0: static int AiChooseAircraftToReplaceWith(Player *p, Vehicle *v)
truelight@0: {
truelight@0: 	int32 avail_money = p->player_money + v->value;
truelight@0: 	return AiChooseAircraftToBuild(avail_money, v->engine_type>=253?1:0);
truelight@0: }
truelight@0: 
truelight@0: static int AiChooseTrainToReplaceWith(Player *p, Vehicle *v)
truelight@0: {
truelight@0: 	int32 avail_money = p->player_money + v->value;
truelight@0: 	int num=0;
truelight@0: 	Vehicle *u = v;
truelight@0: 
truelight@0: 	while (++num, u->next != NULL) {
truelight@0: 		u = u->next;
truelight@0: 	}
truelight@0: 
truelight@0: 	// XXX: check if a wagon
truelight@0: 	return AiChooseTrainToBuild(v->u.rail.railtype, avail_money, 0);
truelight@0: }
truelight@0: 
truelight@0: static int AiChooseShipToReplaceWith(Player *p, Vehicle *v)
truelight@0: {
truelight@0: 	error("!AiChooseShipToReplaceWith");
truelight@0: 
truelight@0: 	/* maybe useless, but avoids compiler warning this way */
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiHandleGotoDepot(Player *p, int cmd)
truelight@0: {
truelight@0: 	if ((p->ai.cur_veh->next_order & OT_MASK) != OT_GOTO_DEPOT)
truelight@0: 		DoCommandByTile(0, p->ai.cur_veh->index, 0, DC_EXEC, cmd);
truelight@0: 
truelight@0: 	if (++p->ai.state_counter <= 1387) {
truelight@0: 		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	if ((p->ai.cur_veh->next_order&OT_MASK) == OT_GOTO_DEPOT) {
truelight@0: 		p->ai.cur_veh->next_order = OT_DUMMY;
truelight@0: 		InvalidateWindow(WC_VEHICLE_VIEW, p->ai.cur_veh->index);
truelight@0: 	}
truelight@0: } 
truelight@0: 
truelight@0: static void AiRestoreVehicleOrders(Vehicle *v, BackuppedOrders *bak)
truelight@0: {
truelight@0: 	uint16 *os = bak->order, ord;
truelight@0: 	int ind = 0;
truelight@0: 	while ((ord = *os++) != 0) {
truelight@0: 		if (DoCommandByTile(0, v->index + (ind << 16), ord, DC_EXEC, CMD_INSERT_ORDER) == CMD_ERROR)
truelight@0: 			break;
truelight@0: 		ind++;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiHandleReplaceTrain(Player *p)
truelight@0: {
truelight@0: 	Vehicle *v = p->ai.cur_veh;
truelight@0: 	BackuppedOrders orderbak[1];
truelight@0: 	int veh;
truelight@0: 	uint tile;
truelight@0: 
truelight@0: 	// wait until the vehicle reaches the depot.
truelight@0: 	if (!IsTrainDepotTile(v->tile) || v->u.rail.track != 0x80 || !(v->vehstatus&VS_STOPPED)) {
truelight@0: 		AiHandleGotoDepot(p, CMD_TRAIN_GOTO_DEPOT);
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	veh = AiChooseTrainToReplaceWith(p, v);
truelight@0: 	if (veh != -1) {
truelight@0: 		BackupVehicleOrders(v, orderbak);
truelight@0: 		tile = v->tile;
truelight@0: 		
truelight@0: 		if (DoCommandByTile(0, v->index, 2, DC_EXEC, CMD_SELL_RAIL_WAGON) != CMD_ERROR &&
truelight@0: 			 DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE) != CMD_ERROR) {
truelight@0: 			veh = _new_train_id;
truelight@0: 			AiRestoreVehicleOrders(&_vehicles[veh], orderbak);
truelight@0: 			DoCommandByTile(0, veh, 0, DC_EXEC, CMD_START_STOP_TRAIN);
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiHandleReplaceRoadVeh(Player *p)
truelight@0: {
truelight@0: 	Vehicle *v = p->ai.cur_veh;
truelight@0: 	BackuppedOrders orderbak[1];
truelight@0: 	int veh;
truelight@0: 	uint tile;
truelight@0: 
truelight@0: 	if (!IsRoadDepotTile(v->tile) || v->u.road.state != 254 || !(v->vehstatus&VS_STOPPED)) {
truelight@0: 		AiHandleGotoDepot(p, CMD_SEND_ROADVEH_TO_DEPOT);
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	veh = AiChooseRoadVehToReplaceWith(p, v);
truelight@0: 	if (veh != -1) {
truelight@0: 		BackupVehicleOrders(v, orderbak);
truelight@0: 		tile = v->tile;
truelight@0: 		
truelight@0: 		if (DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_SELL_ROAD_VEH) != CMD_ERROR &&
truelight@0: 			 DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_ROAD_VEH) != CMD_ERROR) {
truelight@0: 			veh = _new_roadveh_id;
truelight@0: 			AiRestoreVehicleOrders(&_vehicles[veh], orderbak);
truelight@0: 			DoCommandByTile(0, veh, 0, DC_EXEC, CMD_START_STOP_ROADVEH);
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiHandleReplaceAircraft(Player *p)
truelight@0: {
truelight@0: 	Vehicle *v = p->ai.cur_veh;
truelight@0: 	int veh;
truelight@0: 	BackuppedOrders orderbak[1];
truelight@0: 	uint tile;
truelight@0: 
truelight@0: 	if (!IsAircraftHangarTile(v->tile) && !(v->vehstatus&VS_STOPPED)) {
truelight@0: 		AiHandleGotoDepot(p, CMD_SEND_AIRCRAFT_TO_HANGAR);
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	veh = AiChooseAircraftToReplaceWith(p, v);
truelight@0: 	if (veh != -1) {
truelight@0: 		BackupVehicleOrders(v, orderbak);
truelight@0: 		tile = v->tile;
truelight@0: 
truelight@0: 		if (DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_SELL_AIRCRAFT) != CMD_ERROR &&
truelight@0: 			 DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_AIRCRAFT) != CMD_ERROR) {
truelight@0: 			veh = _new_aircraft_id;
truelight@0: 			AiRestoreVehicleOrders(&_vehicles[veh], orderbak);
truelight@0: 			DoCommandByTile(0, veh, 0, DC_EXEC, CMD_START_STOP_AIRCRAFT);
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiHandleReplaceShip(Player *p)
truelight@0: {
truelight@0: 	error("!AiHandleReplaceShip");
truelight@0: }
truelight@0: 
truelight@0: typedef int CheckReplaceProc(Player *p, Vehicle *v);
truelight@0: 
truelight@0: static CheckReplaceProc * const _veh_check_replace_proc[] = {
truelight@0: 	AiChooseTrainToReplaceWith,
truelight@0: 	AiChooseRoadVehToReplaceWith,
truelight@0: 	AiChooseShipToReplaceWith,
truelight@0: 	AiChooseAircraftToReplaceWith,
truelight@0: };
truelight@0: 
truelight@0: typedef void DoReplaceProc(Player *p);
truelight@0: static DoReplaceProc * const _veh_do_replace_proc[] = {
truelight@0: 	AiHandleReplaceTrain,
truelight@0: 	AiHandleReplaceRoadVeh,
truelight@0: 	AiHandleReplaceShip,
truelight@0: 	AiHandleReplaceAircraft
truelight@0: };
truelight@0: 
truelight@0: static void AiStateCheckReplaceVehicle(Player *p)
truelight@0: {
truelight@0: 	Vehicle *v = p->ai.cur_veh;
truelight@0: 
truelight@0: 	if (v->type == 0 || v->owner != _current_player || v->type > VEH_Ship || _veh_check_replace_proc[v->type - VEH_Train](p, v) == -1) {
truelight@0: 		p->ai.state = AIS_VEH_LOOP;
truelight@0: 	} else {
truelight@0: 		p->ai.state_counter = 0;
truelight@0: 		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiStateDoReplaceVehicle(Player *p)
truelight@0: {
truelight@0: 	Vehicle *v = p->ai.cur_veh;
truelight@0: 	p->ai.state = AIS_VEH_LOOP;
truelight@0: 	// vehicle is not owned by the player anymore, something went very wrong.
truelight@0: 	if (v->type == 0 || v->owner != _current_player)
truelight@0: 		return;
truelight@0: 	_veh_do_replace_proc[v->type - VEH_Train](p);
truelight@0: }
truelight@0: 
truelight@0: typedef struct FoundRoute {
truelight@0: 	int distance;
truelight@0: 	byte cargo;
truelight@0: 	void *from;
truelight@0: 	void *to;
truelight@0: } FoundRoute;
truelight@0: 
truelight@0: static Town *AiFindRandomTown() {
truelight@0: 	Town *t = DEREF_TOWN(RandomRange(_total_towns));
truelight@0: 	return (t->xy != 0) ? t : NULL;
truelight@0: }
truelight@0: 
truelight@0: static Industry *AiFindRandomIndustry() {
truelight@0: 	Industry *i = DEREF_INDUSTRY(RandomRange(_total_industries));
truelight@0: 	return (i->xy != 0) ? i : NULL;
truelight@0: }
truelight@0: 
truelight@0: static void AiFindSubsidyIndustryRoute(FoundRoute *fr)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	byte cargo;
truelight@0: 	Subsidy *s;
truelight@0: 	Industry *from, *to_ind;
truelight@0: 	Town *to_tow;
truelight@0: 	TileIndex to_xy;
truelight@0: 
truelight@0: 	// initially error
truelight@0: 	fr->distance = -1;
truelight@0: 
truelight@0: 	// Randomize subsidy index.. 
truelight@0: 	i = RandomRange(lengthof(_subsidies) * 3);
truelight@0: 	if (i >= lengthof(_subsidies))
truelight@0: 		return;
truelight@0: 
truelight@0: 	s = &_subsidies[i];
truelight@0: 
truelight@0: 	// Don't want passengers or mail
truelight@0: 	cargo = s->cargo_type;
truelight@0: 	if (cargo == 0xFF || cargo == CT_PASSENGERS || cargo == CT_MAIL || s->age > 7)
truelight@0: 		return;
truelight@0: 	fr->cargo = cargo;
truelight@0: 
truelight@0: 	fr->from = from = DEREF_INDUSTRY(s->from);
truelight@0: 
truelight@0: 	if (cargo == CT_GOODS || cargo == CT_FOOD) {
truelight@0: 		to_tow = DEREF_TOWN(s->to);
truelight@0: 		if (to_tow->population < (uint32)(cargo == CT_FOOD ? 200 : 900))
truelight@0: 			return; // error
truelight@0: 		fr->to = to_tow;
truelight@0: 		to_xy = to_tow->xy;
truelight@0: 	} else {
truelight@0: 		to_ind = DEREF_INDUSTRY(s->to);
truelight@0: 		fr->to = to_ind;
truelight@0: 		to_xy = to_ind->xy;
truelight@0: 	}
truelight@0: 
truelight@0: 	fr->distance = GetTileDist(from->xy, to_xy);
truelight@0: }
truelight@0: 
truelight@0: static void AiFindSubsidyPassengerRoute(FoundRoute *fr)
truelight@0: {
truelight@0: 	uint i;
truelight@0: 	Subsidy *s;
truelight@0: 	Town *from,*to;
truelight@0: 
truelight@0: 	// initially error
truelight@0: 	fr->distance = -1;
truelight@0: 
truelight@0: 	// Randomize subsidy index.. 
truelight@0: 	i = RandomRange(lengthof(_subsidies) * 3);
truelight@0: 	if (i >= lengthof(_subsidies))
truelight@0: 		return;
truelight@0: 
truelight@0: 	s = &_subsidies[i];
truelight@0: 
truelight@0: 	// Only want passengers
truelight@0: 	if (s->cargo_type != CT_PASSENGERS || s->age > 7)
truelight@0: 		return;
truelight@0: 	fr->cargo = s->cargo_type;
truelight@0: 
truelight@0: 	fr->from = from = DEREF_TOWN(s->from);
truelight@0: 	fr->to = to = DEREF_TOWN(s->to);
truelight@0: 
truelight@0: 	// They must be big enough
truelight@0: 	if (from->population < 400 || to->population < 400)
truelight@0: 		return;
truelight@0: 
truelight@0: 	fr->distance = GetTileDist(from->xy, to->xy);
truelight@0: }
truelight@0: 
truelight@0: static void AiFindRandomIndustryRoute(FoundRoute *fr)
truelight@0: {
truelight@0: 	Industry *i,*i2;
truelight@0: 	Town *t;
truelight@0: 	uint32 r;
truelight@0: 	byte cargo;
truelight@0: 
truelight@0: 	// initially error
truelight@0: 	fr->distance = -1;
truelight@0: 
truelight@0: 	r = Random();
truelight@0: 
truelight@0: 	// pick a source
truelight@0: 	fr->from = i = AiFindRandomIndustry();
truelight@0: 	if (i == NULL)	
truelight@0: 		return;
truelight@0: 
truelight@0: 	// pick a random produced cargo
truelight@0: 	cargo = i->produced_cargo[0];
truelight@0: 	if (r&1 && i->produced_cargo[1] != 0xFF)
truelight@0: 		cargo = i->produced_cargo[1];
truelight@0: 
truelight@0: 	fr->cargo = cargo;
truelight@0: 
truelight@0: 	// don't allow passengers
truelight@0: 	if (cargo == 0xFF || cargo == CT_PASSENGERS)
truelight@0: 		return;
truelight@0: 
truelight@0: 	if (cargo != CT_GOODS && cargo != CT_FOOD) {
truelight@0: 		// pick a dest, and see if it can receive
truelight@0: 		i2 = AiFindRandomIndustry();
truelight@0: 		if (i2 == NULL || i == i2 || !(i2->accepts_cargo[0] == cargo || i2->accepts_cargo[1] == cargo || i2->accepts_cargo[2] == cargo))
truelight@0: 			return;
truelight@0: 
truelight@0: 		fr->to = i2;
truelight@0: 		fr->distance = GetTileDist(i->xy, i2->xy);
truelight@0: 	} else {
truelight@0: 		// pick a dest town, and see if it's big enough
truelight@0: 		t = AiFindRandomTown();
truelight@0: 		if (t == NULL || t->population < (uint32)(cargo == CT_FOOD ? 200 : 900))
truelight@0: 			return;
truelight@0: 		
truelight@0: 		fr->to = t;
truelight@0: 		fr->distance = GetTileDist(i->xy, t->xy);
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiFindRandomPassengerRoute(FoundRoute *fr)
truelight@0: {
truelight@0: 	uint32 r;
truelight@0: 	Town *source, *dest;
truelight@0: 
truelight@0: 	// initially error
truelight@0: 	fr->distance = -1;
truelight@0: 
truelight@0: 	r = Random();
truelight@0: 
truelight@0: 	fr->from = source = AiFindRandomTown();
truelight@0: 	if (source == NULL || source->population < 400)
truelight@0: 		return;
truelight@0: 	
truelight@0: 	fr->to = dest = AiFindRandomTown();
truelight@0: 	if (dest == NULL || source == dest || dest->population < 400)
truelight@0: 		return;
truelight@0: 
truelight@0: 	fr->distance = GetTileDist(source->xy, dest->xy);
truelight@0: }
truelight@0: 
truelight@0: // Warn: depends on 'xy' being the first element in both Town and Industry
truelight@0: #define GET_TOWN_OR_INDUSTRY_TILE(p) (((Town*)(p))->xy)
truelight@0: 
truelight@0: static bool AiCheckIfRouteIsGood(Player *p, FoundRoute *fr, byte bitmask)
truelight@0: {
truelight@0: 	TileIndex from_tile, to_tile;
truelight@0: 	Station *st;
truelight@0: 	int dist, cur;
truelight@0: 	uint same_station = 0;
truelight@0: 
truelight@0: 	// Make sure distance to closest station is < 37 pixels.
truelight@0: 	from_tile = GET_TOWN_OR_INDUSTRY_TILE(fr->from);
truelight@0: 	to_tile = GET_TOWN_OR_INDUSTRY_TILE(fr->to);
truelight@0: 
truelight@0: 	dist = 0xFFFF;
truelight@0: 	FOR_ALL_STATIONS(st) if (st->xy != 0 && st->owner == _current_player) {
truelight@0: 		cur = GetTileDist1D(from_tile, st->xy);
truelight@0: 		if (cur < dist) dist = cur;
truelight@0: 		cur = GetTileDist1D(to_tile, st->xy);
truelight@0: 		if (cur < dist) dist = cur;
truelight@0: 		if (to_tile == from_tile && st->xy == to_tile)
truelight@0: 		    same_station++;
truelight@0: 	}
truelight@0: 	
truelight@0: 	// To prevent the AI from building ten busstations in the same town, do some calculations
truelight@0: 	//  For each road or airport station, we want 350 of population!
truelight@0: 	if ((bitmask == 2 || bitmask == 4) && same_station > 2 && ((Town *)(fr->from))->population < same_station * 350)
truelight@0: 	    return false;
truelight@0: 
truelight@0: 	if (dist != 0xFFFF && dist > 37)
truelight@0: 		return false;
truelight@0: 
truelight@0: 	if (p->ai.route_type_mask != 0 && !(p->ai.route_type_mask&bitmask) && !CHANCE16(1,5))
truelight@0: 		return false;
truelight@0: 
truelight@0: 	if (fr->cargo == CT_PASSENGERS || fr->cargo == CT_MAIL) {
truelight@0: 		if (((Town*)fr->from)->pct_pass_transported > 0x99 ||
truelight@0: 				((Town*)fr->to)->pct_pass_transported > 0x99)
truelight@0: 			return false;
truelight@0: 
truelight@0: 		// Make sure it has a reasonably good rating
truelight@0: 		if ( ((Town*)fr->from)->ratings[_current_player] < -100 ||
truelight@0: 				((Town*)fr->to)->ratings[_current_player] < -100)
truelight@0: 			return false;
truelight@0: 	} else {
truelight@0: 		Industry *i = (Industry*)fr->from;
truelight@0: 		
truelight@0: 		if (i->pct_transported[fr->cargo != i->produced_cargo[0]] > 0x99 || 
truelight@0: 				i->total_production[fr->cargo != i->produced_cargo[0]] == 0)
truelight@0: 			return false;
truelight@0: 	}
truelight@0: 
truelight@0: 	p->ai.route_type_mask |= bitmask;
truelight@0: 	return true;
truelight@0: }
truelight@0: 
truelight@0: static byte AiGetDirectionBetweenTiles(TileIndex a, TileIndex b)
truelight@0: {
truelight@0: 	byte i = (GET_TILE_X(a) < GET_TILE_X(b)) ? 1 : 0;
truelight@0: 	if (GET_TILE_Y(a) >= GET_TILE_Y(b))	i ^= 3;
truelight@0: 	return i;
truelight@0: }
truelight@0: 
truelight@0: static TileIndex AiGetPctTileBetween(TileIndex a, TileIndex b, byte pct)
truelight@0: {
truelight@0: 	return TILE_XY(
truelight@0: 			GET_TILE_X(a) + ((GET_TILE_X(b) - GET_TILE_X(a)) * pct >> 8),
truelight@0: 			GET_TILE_Y(a) + ((GET_TILE_Y(b) - GET_TILE_Y(a)) * pct >> 8)
truelight@0: 		);
truelight@0: }
truelight@0: 
truelight@0: static void AiWantLongIndustryRoute(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	FoundRoute fr;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		// look for one from the subsidy list
truelight@0: 		AiFindSubsidyIndustryRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 60, 90+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// try a random one
truelight@0: 		AiFindRandomIndustryRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 60, 90+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 1))
truelight@0: 		return;
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@0: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@0: 
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 9;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.unk6 = 1;
truelight@0: 	p->ai.src.unk7 = 0;
truelight@0: 	p->ai.src.buildcmd_a = 0x24;
truelight@0: 	p->ai.src.buildcmd_b = 0xFF;
truelight@0: 	p->ai.src.direction = AiGetDirectionBetweenTiles(
truelight@0: 			p->ai.src.spec_tile,
truelight@0: 			p->ai.dst.spec_tile
truelight@0: 		);
truelight@0: 	p->ai.src.cargo = fr.cargo | 0x80;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 9;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.unk6 = 1;
truelight@0: 	p->ai.dst.unk7 = 0;
truelight@0: 	p->ai.dst.buildcmd_a = 0x34;
truelight@0: 	p->ai.dst.buildcmd_b = 0xFF;
truelight@0: 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
truelight@0: 			p->ai.dst.spec_tile,
truelight@0: 			p->ai.src.spec_tile
truelight@0: 		);
truelight@0: 	p->ai.dst.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill middle field 1
truelight@0: 	p->ai.mid1.spec_tile = AiGetPctTileBetween(
truelight@0: 			p->ai.src.spec_tile,
truelight@0: 			p->ai.dst.spec_tile,
truelight@0: 			0x55
truelight@0: 		);
truelight@0: 	p->ai.mid1.use_tile = 0;
truelight@0: 	p->ai.mid1.rand_rng = 6;
truelight@0: 	p->ai.mid1.cur_building_rule = 0xFF;
truelight@0: 	p->ai.mid1.unk6 = 2;
truelight@0: 	p->ai.mid1.unk7 = 1;
truelight@0: 	p->ai.mid1.buildcmd_a = 0x30;
truelight@0: 	p->ai.mid1.buildcmd_b = 0xFF;
truelight@0: 	p->ai.mid1.direction = p->ai.src.direction;
truelight@0: 	p->ai.mid1.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill middle field 2
truelight@0: 	p->ai.mid2.spec_tile = AiGetPctTileBetween(
truelight@0: 			p->ai.src.spec_tile,
truelight@0: 			p->ai.dst.spec_tile,
truelight@0: 			0xAA
truelight@0: 		);
truelight@0: 	p->ai.mid2.use_tile = 0;
truelight@0: 	p->ai.mid2.rand_rng = 6;
truelight@0: 	p->ai.mid2.cur_building_rule = 0xFF;
truelight@0: 	p->ai.mid2.unk6 = 2;
truelight@0: 	p->ai.mid2.unk7 = 1;
truelight@0: 	p->ai.mid2.buildcmd_a = 0xFF;
truelight@0: 	p->ai.mid2.buildcmd_b = 0xFF;
truelight@0: 	p->ai.mid2.direction = p->ai.dst.direction;
truelight@0: 	p->ai.mid2.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = fr.cargo;
truelight@0: 	p->ai.num_wagons = 3;
truelight@0: 	p->ai.build_kind = 2;
truelight@0: 	p->ai.num_build_rec = 4;
truelight@0: 	p->ai.num_loco_to_build = 2;
truelight@0: 	p->ai.num_want_fullload = 2;
truelight@0: 	p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 
truelight@0: 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
truelight@0: 	p->ai.state_mode = -1;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantMediumIndustryRoute(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	FoundRoute fr;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		
truelight@0: 		// look for one from the subsidy list
truelight@0: 		AiFindSubsidyIndustryRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 40, 60+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// try a random one
truelight@0: 		AiFindRandomIndustryRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 40, 60+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 1))
truelight@0: 		return;
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 9;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.unk6 = 1;
truelight@0: 	p->ai.src.unk7 = 0;
truelight@0: 	p->ai.src.buildcmd_a = 0x10;
truelight@0: 	p->ai.src.buildcmd_b = 0xFF;
truelight@0: 	p->ai.src.direction = AiGetDirectionBetweenTiles(
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.from),
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.to)
truelight@0: 		);
truelight@0: 	p->ai.src.cargo = fr.cargo | 0x80;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 9;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.unk6 = 1;
truelight@0: 	p->ai.dst.unk7 = 0;
truelight@0: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@0: 	p->ai.dst.buildcmd_b = 0xFF;
truelight@0: 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.to),
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.from)
truelight@0: 		);
truelight@0: 	p->ai.dst.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = fr.cargo;
truelight@0: 	p->ai.num_wagons = 3;
truelight@0: 	p->ai.build_kind = 1;
truelight@0: 	p->ai.num_build_rec = 2;
truelight@0: 	p->ai.num_loco_to_build = 1;
truelight@0: 	p->ai.num_want_fullload = 1;
truelight@0: 	p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
truelight@0: 	p->ai.state_mode = -1;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantShortIndustryRoute(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	FoundRoute fr;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		
truelight@0: 		// look for one from the subsidy list
truelight@0: 		AiFindSubsidyIndustryRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 15, 40+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// try a random one
truelight@0: 		AiFindRandomIndustryRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 15, 40+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 1))
truelight@0: 		return;
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 9;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.unk6 = 1;
truelight@0: 	p->ai.src.unk7 = 0;
truelight@0: 	p->ai.src.buildcmd_a = 0x10;
truelight@0: 	p->ai.src.buildcmd_b = 0xFF;
truelight@0: 	p->ai.src.direction = AiGetDirectionBetweenTiles(
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.from),
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.to)
truelight@0: 		);
truelight@0: 	p->ai.src.cargo = fr.cargo | 0x80;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 9;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.unk6 = 1;
truelight@0: 	p->ai.dst.unk7 = 0;
truelight@0: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@0: 	p->ai.dst.buildcmd_b = 0xFF;
truelight@0: 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.to),
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.from)
truelight@0: 		);
truelight@0: 	p->ai.dst.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = fr.cargo;
truelight@0: 	p->ai.num_wagons = 2;
truelight@0: 	p->ai.build_kind = 1;
truelight@0: 	p->ai.num_build_rec = 2;
truelight@0: 	p->ai.num_loco_to_build = 1;
truelight@0: 	p->ai.num_want_fullload = 1;
truelight@0: 	p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
truelight@0: 	p->ai.state_mode = -1;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantMailRoute(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	FoundRoute fr;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		
truelight@0: 		// look for one from the subsidy list
truelight@0: 		AiFindSubsidyPassengerRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 60, 110+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// try a random one
truelight@0: 		AiFindRandomPassengerRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 60, 110+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	fr.cargo = CT_MAIL;
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 1))
truelight@0: 		return;
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 7;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.unk6 = 1;
truelight@0: 	p->ai.src.unk7 = 0;
truelight@0: 	p->ai.src.buildcmd_a = 0x24;
truelight@0: 	p->ai.src.buildcmd_b = 0xFF;
truelight@0: 	p->ai.src.direction = AiGetDirectionBetweenTiles(
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.from),
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.to)
truelight@0: 		);
truelight@0: 	p->ai.src.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 7;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.unk6 = 1;
truelight@0: 	p->ai.dst.unk7 = 0;
truelight@0: 	p->ai.dst.buildcmd_a = 0x34;
truelight@0: 	p->ai.dst.buildcmd_b = 0xFF;
truelight@0: 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.to),
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.from)
truelight@0: 		);
truelight@0: 	p->ai.dst.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill middle field 1
truelight@0: 	p->ai.mid1.spec_tile = AiGetPctTileBetween(
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.from),
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.to),
truelight@0: 			0x55
truelight@0: 		);
truelight@0: 	p->ai.mid1.use_tile = 0;
truelight@0: 	p->ai.mid1.rand_rng = 6;
truelight@0: 	p->ai.mid1.cur_building_rule = 0xFF;
truelight@0: 	p->ai.mid1.unk6 = 2;
truelight@0: 	p->ai.mid1.unk7 = 1;
truelight@0: 	p->ai.mid1.buildcmd_a = 0x30;
truelight@0: 	p->ai.mid1.buildcmd_b = 0xFF;
truelight@0: 	p->ai.mid1.direction = p->ai.src.direction;
truelight@0: 	p->ai.mid1.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill middle field 2
truelight@0: 	p->ai.mid2.spec_tile = AiGetPctTileBetween(
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.from),
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.to),
truelight@0: 			0xAA
truelight@0: 		);
truelight@0: 	p->ai.mid2.use_tile = 0;
truelight@0: 	p->ai.mid2.rand_rng = 6;
truelight@0: 	p->ai.mid2.cur_building_rule = 0xFF;
truelight@0: 	p->ai.mid2.unk6 = 2;
truelight@0: 	p->ai.mid2.unk7 = 1;
truelight@0: 	p->ai.mid2.buildcmd_a = 0xFF;
truelight@0: 	p->ai.mid2.buildcmd_b = 0xFF;
truelight@0: 	p->ai.mid2.direction = p->ai.dst.direction;
truelight@0: 	p->ai.mid2.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = fr.cargo;
truelight@0: 	p->ai.num_wagons = 3;
truelight@0: 	p->ai.build_kind = 2;
truelight@0: 	p->ai.num_build_rec = 4;
truelight@0: 	p->ai.num_loco_to_build = 2;
truelight@0: 	p->ai.num_want_fullload = 0;
truelight@0: 	p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
truelight@0: 	p->ai.state_mode = -1;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantPassengerRoute(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	FoundRoute fr;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		
truelight@0: 		// look for one from the subsidy list
truelight@0: 		AiFindSubsidyPassengerRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 0, 55+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// try a random one
truelight@0: 		AiFindRandomPassengerRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 0, 55+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	fr.cargo = CT_PASSENGERS;
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 1))
truelight@0: 		return;
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 7;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.unk6 = 1;
truelight@0: 	p->ai.src.unk7 = 0;
truelight@0: 	p->ai.src.buildcmd_a = 0x10;
truelight@0: 	p->ai.src.buildcmd_b = 0xFF;
truelight@0: 	p->ai.src.direction = AiGetDirectionBetweenTiles(
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.from),
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.to)
truelight@0: 		);
truelight@0: 	p->ai.src.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 7;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.unk6 = 1;
truelight@0: 	p->ai.dst.unk7 = 0;
truelight@0: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@0: 	p->ai.dst.buildcmd_b = 0xFF;
truelight@0: 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.to),
truelight@0: 			GET_TOWN_OR_INDUSTRY_TILE(fr.from)
truelight@0: 		);
truelight@0: 	p->ai.dst.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = fr.cargo;
truelight@0: 	p->ai.num_wagons = 2;
truelight@0: 	p->ai.build_kind = 1;
truelight@0: 	p->ai.num_build_rec = 2;
truelight@0: 	p->ai.num_loco_to_build = 1;
truelight@0: 	p->ai.num_want_fullload = 0;
truelight@0: 	p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
truelight@0: 	p->ai.state_mode = -1;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantTrainRoute(Player *p)
truelight@0: {
truelight@0: 	uint16 r;
truelight@0: 	p->ai.railtype_to_use = p->max_railtype - 1;
truelight@0: 	r = (uint16)Random();
truelight@0: 	
truelight@0: 	if (r > 0xD000) {
truelight@0: 		AiWantLongIndustryRoute(p);
truelight@0: 	} else if (r > 0x6000) {
truelight@0: 		AiWantMediumIndustryRoute(p);
truelight@0: 	} else if (r > 0x1000) {
truelight@0: 		AiWantShortIndustryRoute(p);
truelight@0: 	} else if (r > 0x800) {
truelight@0: 		AiWantPassengerRoute(p);
truelight@0: 	} else {
truelight@0: 		AiWantMailRoute(p);
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiWantLongRoadIndustryRoute(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	FoundRoute fr;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		
truelight@0: 		// look for one from the subsidy list
truelight@0: 		AiFindSubsidyIndustryRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 35, 55+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// try a random one
truelight@0: 		AiFindRandomIndustryRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 35, 55+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 2))
truelight@0: 		return;
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 9;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.buildcmd_a = 1;
truelight@0: 	p->ai.src.direction = 0;
truelight@0: 	p->ai.src.cargo = fr.cargo | 0x80;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 9;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@0: 	p->ai.dst.direction = 0;
truelight@0: 	p->ai.dst.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = fr.cargo;
truelight@0: 	p->ai.num_build_rec = 2;
truelight@0: 	p->ai.num_loco_to_build = 5;
truelight@0: 	p->ai.num_want_fullload = 5;
truelight@0: 
truelight@0: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 
truelight@0: 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
truelight@0: 	p->ai.state_mode = -1;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantMediumRoadIndustryRoute(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	FoundRoute fr;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		
truelight@0: 		// look for one from the subsidy list
truelight@0: 		AiFindSubsidyIndustryRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 15, 40+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// try a random one
truelight@0: 		AiFindRandomIndustryRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 15, 40+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 2))
truelight@0: 		return;
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 9;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.buildcmd_a = 1;
truelight@0: 	p->ai.src.direction = 0;
truelight@0: 	p->ai.src.cargo = fr.cargo | 0x80;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 9;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@0: 	p->ai.dst.direction = 0;
truelight@0: 	p->ai.dst.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = fr.cargo;
truelight@0: 	p->ai.num_build_rec = 2;
truelight@0: 	p->ai.num_loco_to_build = 3;
truelight@0: 	p->ai.num_want_fullload = 3;
truelight@0: 
truelight@0: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 
truelight@0: 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
truelight@0: 	p->ai.state_mode = -1;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantLongRoadPassengerRoute(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	FoundRoute fr;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		
truelight@0: 		// look for one from the subsidy list
truelight@0: 		AiFindSubsidyPassengerRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 55, 180+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// try a random one
truelight@0: 		AiFindRandomPassengerRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance, 55, 180+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	fr.cargo = CT_PASSENGERS;
truelight@0: 
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 2))
truelight@0: 		return;
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 10;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.buildcmd_a = 1;
truelight@0: 	p->ai.src.direction = 0;
truelight@0: 	p->ai.src.cargo = CT_PASSENGERS;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 10;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@0: 	p->ai.dst.direction = 0;
truelight@0: 	p->ai.dst.cargo = CT_PASSENGERS;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = CT_PASSENGERS;
truelight@0: 	p->ai.num_build_rec = 2;
truelight@0: 	p->ai.num_loco_to_build = 4;
truelight@0: 	p->ai.num_want_fullload = 0;
truelight@0: 
truelight@0: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 
truelight@0: 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
truelight@0: 	p->ai.state_mode = -1;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantPassengerRouteInsideTown(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	FoundRoute fr;
truelight@0: 	Town *t;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		// Find a town big enough
truelight@0: 		t = AiFindRandomTown();
truelight@0: 		if (t != NULL && t->population >= 700)
truelight@0: 			break;
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	fr.cargo = CT_PASSENGERS;
truelight@0: 	fr.from = fr.to = t;
truelight@0: 
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 2))
truelight@0: 		return;
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.src.spec_tile = t->xy;
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 10;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.buildcmd_a = 1;
truelight@0: 	p->ai.src.direction = 0;
truelight@0: 	p->ai.src.cargo = CT_PASSENGERS;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	p->ai.dst.spec_tile = t->xy;
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 10;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.buildcmd_a = 0xFF;
truelight@0: 	p->ai.dst.direction = 0;
truelight@0: 	p->ai.dst.cargo = CT_PASSENGERS;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = CT_PASSENGERS;
truelight@0: 	p->ai.num_build_rec = 2;
truelight@0: 	p->ai.num_loco_to_build = 2;
truelight@0: 	p->ai.num_want_fullload = 0;
truelight@0: 
truelight@0: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 
truelight@0: 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
truelight@0: 	p->ai.state_mode = -1;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantRoadRoute(Player *p)
truelight@0: {
truelight@0: 	uint16 r = (uint16)Random();
truelight@0: 
truelight@0: 	if (r > 0x4000) {
truelight@0: 		AiWantLongRoadIndustryRoute(p);
truelight@0: 	} else if (r > 0x2000) {
truelight@0: 		AiWantMediumRoadIndustryRoute(p);
truelight@0: 	} else if (r > 0x1000) {
truelight@0: 		AiWantLongRoadPassengerRoute(p);
truelight@0: 	} else {
truelight@0: 		AiWantPassengerRouteInsideTown(p);
truelight@0: 	}
truelight@0: 
truelight@0: }
truelight@0: 
truelight@0: static void AiWantPassengerAircraftRoute(Player *p)
truelight@0: {
truelight@0: 	FoundRoute fr;
truelight@0: 	int i;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		
truelight@0: 		// look for one from the subsidy list
truelight@0: 		AiFindSubsidyPassengerRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance,0,95+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// try a random one
truelight@0: 		AiFindRandomPassengerRoute(&fr);
truelight@0: 		if (IS_INT_INSIDE(fr.distance,0,95+1))
truelight@0: 			break;
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	fr.cargo = CT_PASSENGERS;
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 4))
truelight@0: 		return;
truelight@0: 
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 12;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 12;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.cargo = fr.cargo;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = fr.cargo;
truelight@0: 	p->ai.build_kind = 0;
truelight@0: 	p->ai.num_build_rec = 2;
truelight@0: 	p->ai.num_loco_to_build = 1;
truelight@0: 	p->ai.num_want_fullload = 1;
truelight@0: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 	
truelight@0: 	p->ai.state = AIS_AIRPORT_STUFF;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantOilRigAircraftRoute(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	FoundRoute fr;
truelight@0: 	Town *t;
truelight@0: 	Industry *in;
truelight@0: 
truelight@0: 	i = 60;
truelight@0: 	for(;;) {
truelight@0: 		// Find a town
truelight@0: 		t = AiFindRandomTown();
truelight@0: 		if (t != NULL) {
truelight@0: 			// Find a random oil rig industry
truelight@0: 			in = DEREF_INDUSTRY(RandomRange(lengthof(_industries)));
truelight@0: 			if (in != NULL && in->type == IT_OIL_RIG) {
truelight@0: 				if (GetTileDist(t->xy, in->xy) < 60)
truelight@0: 					break;
truelight@0: 			}
truelight@0: 		}
truelight@0: 
truelight@0: 		// only test 60 times
truelight@0: 		if (--i == 0)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	fr.cargo = CT_PASSENGERS;
truelight@0: 	fr.from = fr.to = t;
truelight@0: 
truelight@0: 	if (!AiCheckIfRouteIsGood(p, &fr, 4))
truelight@0: 		return;
truelight@0: 
truelight@0: 	// Fill the source field
truelight@0: 	p->ai.src.spec_tile = t->xy;
truelight@0: 	p->ai.src.use_tile = 0;
truelight@0: 	p->ai.src.rand_rng = 12;
truelight@0: 	p->ai.src.cur_building_rule = 0xFF;
truelight@0: 	p->ai.src.cargo = CT_PASSENGERS;
truelight@0: 
truelight@0: 	// Fill the dest field
truelight@0: 	p->ai.dst.spec_tile = in->xy;
truelight@0: 	p->ai.dst.use_tile = 0;
truelight@0: 	p->ai.dst.rand_rng = 5;
truelight@0: 	p->ai.dst.cur_building_rule = 0xFF;
truelight@0: 	p->ai.dst.cargo = CT_PASSENGERS;
truelight@0: 
truelight@0: 	// Fill common fields
truelight@0: 	p->ai.cargo_type = CT_PASSENGERS;
truelight@0: 	p->ai.build_kind = 1;
truelight@0: 	p->ai.num_build_rec = 2;
truelight@0: 	p->ai.num_loco_to_build = 1;
truelight@0: 	p->ai.num_want_fullload = 0;
truelight@0: //	p->ai.loco_id = INVALID_VEHICLE;
truelight@0: 	p->ai.order_list_blocks[0] = 0;
truelight@0: 	p->ai.order_list_blocks[1] = 1;
truelight@0: 	p->ai.order_list_blocks[2] = 255;
truelight@0: 
truelight@0: 	p->ai.state = AIS_AIRPORT_STUFF;
truelight@0: 	p->ai.timeout_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static void AiWantAircraftRoute(Player *p)
truelight@0: {
truelight@0: 	uint16 r = (uint16)Random();
truelight@0: 
truelight@0: 	if (r >= 0x2AAA || _date < 0x3912) {
truelight@0: 		AiWantPassengerAircraftRoute(p);
truelight@0: 	} else {
truelight@0: 		AiWantOilRigAircraftRoute(p);
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiWantShipRoute(Player *p)
truelight@0: {
truelight@0: 	// XXX
truelight@0: //	error("AiWaitShipRoute");
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: 
truelight@0: static void AiStateWantNewRoute(Player *p)
truelight@0: {
truelight@0: 	uint16 r;
truelight@0: 	int i;
truelight@0: 
truelight@0: 	if (p->player_money < AiGetBasePrice(p) * 500) {
truelight@0: 		p->ai.state = AIS_0;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	i = 200;
truelight@0: 	for(;;) {
truelight@0: 		r = (uint16)Random();
truelight@0: 		
truelight@0: 		if (r < 0x7626) {
truelight@20: 			if (_patches.ai_disable_veh_train) continue;
truelight@0: 			AiWantTrainRoute(p);
truelight@0: 		} else if (r < 0xC4EA) {
truelight@20: 			if (_patches.ai_disable_veh_roadveh) continue;
truelight@0: 			AiWantRoadRoute(p);
truelight@0: 		} else if (r < 0xD89B) {
truelight@20: 			if (_patches.ai_disable_veh_aircraft) continue;
truelight@0: 			AiWantAircraftRoute(p);
truelight@0: 		} else {
truelight@20: 			if (_patches.ai_disable_veh_ship) continue;
truelight@0: 			AiWantShipRoute(p);
truelight@0: 		}
truelight@0: 		
truelight@0: 		// got a route?
truelight@0: 		if (p->ai.state != AIS_WANT_NEW_ROUTE)
truelight@0: 			break;
truelight@0: 
truelight@0: 		// time out?
truelight@0: 		if (--i == 0) {
truelight@0: 			if (++p->ai.state_counter == 556) p->ai.state = AIS_0;
truelight@0: 			break;
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static bool AiCheckTrackResources(TileIndex tile, const AiDefaultBlockData *p, byte cargo)
truelight@0: {
truelight@0: 	uint values[NUM_CARGO];
truelight@0: 	int w,h;
truelight@0: 	uint tile2;
truelight@0: 
truelight@0: 	for(;p->mode != 4;p++) if (p->mode == 1) {
truelight@0: 		tile2 = TILE_ADD(tile, p->tileoffs);
truelight@0: 
truelight@0: 		w = ((p->attr>>1) & 7);
truelight@0: 		h = ((p->attr>>4) & 7);
truelight@0: 		if (p->attr&1) intswap(w, h);
truelight@0: 
truelight@0: 		if (cargo & 0x80) {
truelight@0: 			GetProductionAroundTiles(values, tile2, w, h);
truelight@0: 			return values[cargo & 0x7F] != 0;
truelight@0: 		} else {
truelight@0: 			GetAcceptanceAroundTiles(values, tile2, w, h);
truelight@0: 			if (!(values[cargo] & ~7))
truelight@0: 				return false;
truelight@0: 			if (cargo != CT_MAIL)
truelight@0: 				return true;
truelight@0: 			return !!((values[cargo]>>1) & ~7);
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	return true;
truelight@0: }
truelight@0: 
truelight@0: static int32 AiDoBuildDefaultRailTrack(TileIndex tile, const AiDefaultBlockData *p, byte flag)
truelight@0: {
truelight@0: 	int32 r;
truelight@0: 	int32 total_cost = 0;
truelight@0: 	Town *t = NULL;
truelight@0: 	int rating = 0;
truelight@0: 	int i,j,k;
truelight@0: 
truelight@0: 	for(;;) {
truelight@0: 		// This will seldomly overflow for valid reasons. Mask it to be on the safe side.
truelight@0: 		uint c = TILE_MASK(tile + p->tileoffs);
truelight@0: 
truelight@0: 		_cleared_town = NULL;
truelight@0: 
truelight@0: 		if (p->mode < 2) {
truelight@0: 			if (p->mode == 0) {
truelight@0: 				// Depot
truelight@0: 				r = DoCommandByTile(c, _cur_ai_player->ai.railtype_to_use, p->attr, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_TRAIN_DEPOT);
truelight@0: 			} else {
truelight@0: 				// Station
truelight@0: 				r = DoCommandByTile(c, (p->attr&1) | (p->attr>>4)<<8 | (p->attr>>1&7)<<16, _cur_ai_player->ai.railtype_to_use, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_RAILROAD_STATION);
truelight@0: 			}
truelight@0: 
truelight@0: 			if (r == CMD_ERROR) return CMD_ERROR;
truelight@0: 			total_cost += r;
truelight@0: 
truelight@0: clear_town_stuff:;
truelight@0: 			if (_cleared_town != NULL) {
truelight@0: 				if (t != NULL && t != _cleared_town)
truelight@0: 					return CMD_ERROR;
truelight@0: 				t = _cleared_town;
truelight@0: 				rating += _cleared_town_rating;
truelight@0: 			}
truelight@0: 		} else if (p->mode == 2) {
truelight@0: 			// Rail
truelight@0: 			if (IS_TILETYPE(c, MP_RAILWAY))
truelight@0: 				return CMD_ERROR;
truelight@0: 
truelight@0: 			j = p->attr;
truelight@0: 			k = 0;
truelight@0: 			
truelight@0: 			// Build the rail
truelight@0: 			for(i=0; i!=6; i++,j>>=1) {
truelight@0: 				if (j&1) {
truelight@0: 					k = i;
truelight@0: 					r = DoCommandByTile(c, _cur_ai_player->ai.railtype_to_use, i, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_SINGLE_RAIL);
truelight@0: 					if (r == CMD_ERROR) return CMD_ERROR;
truelight@0: 					total_cost += r;
truelight@0: 				}
truelight@0: 			}
truelight@0: 			
truelight@0: 			/* signals too? */
truelight@0: 			if (j&3) {
truelight@0: 				// Can't build signals on a road.
truelight@0: 				if (IS_TILETYPE(c, MP_STREET))
truelight@0: 					return CMD_ERROR;
truelight@0: 
truelight@0: 				if (flag & DC_EXEC) {
truelight@0: 					j = 4 - j;
truelight@0: 					do {
truelight@0: 						r = DoCommandByTile(c, k, 0, flag, CMD_BUILD_SIGNALS);
truelight@0: 					} while (--j);
truelight@0: 				} else {
truelight@0: 					r = _price.build_signals;
truelight@0: 				}
truelight@0: 				if (r == CMD_ERROR) return CMD_ERROR;
truelight@0: 				total_cost += r;
truelight@0: 			}
truelight@0: 		} else if (p->mode == 3) {
truelight@0: 			//Clear stuff and then build single rail.
truelight@0: 			if (GetTileSlope(c,NULL) != 0)
truelight@0: 				return CMD_ERROR;
truelight@0: 			r = DoCommandByTile(c, 0, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_LANDSCAPE_CLEAR);
truelight@0: 			if (r == CMD_ERROR) return CMD_ERROR;
truelight@0: 			total_cost += r + _price.build_rail;
truelight@0: 
truelight@0: 			if (flag & DC_EXEC) {
truelight@0: 				DoCommandByTile(c, _cur_ai_player->ai.railtype_to_use, p->attr&1, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_SINGLE_RAIL);
truelight@0: 			}
truelight@0: 
truelight@0: 			goto clear_town_stuff;
truelight@0: 		} else {
truelight@0: 			// Unk
truelight@0: 			break;
truelight@0: 		}
truelight@0: 		
truelight@0: 		p++;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (!(flag & DC_EXEC)) {
truelight@0: 		if (t != NULL && rating > t->ratings[_current_player]) {
truelight@0: 			return CMD_ERROR;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	return total_cost;
truelight@0: }
truelight@0: 
truelight@0: // Returns rule and cost
truelight@0: static int AiBuildDefaultRailTrack(TileIndex tile, byte p0, byte p1, byte p2, byte p3, byte dir, byte cargo, int32 *cost)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	const AiDefaultRailBlock *p;
truelight@0: 
truelight@0: 	for(i=0; (p = _default_rail_track_data[i]) != NULL; i++) {
truelight@0: 		if (p->p0 == p0 && p->p1 == p1 && p->p2 == p2 && p->p3 == p3 && 
truelight@0: 				(p->dir == 0xFF || p->dir == dir || ((p->dir-1)&3) == dir)) {
truelight@0: 			*cost = AiDoBuildDefaultRailTrack(tile, p->data, DC_NO_TOWN_RATING);
truelight@0: 			if (*cost != CMD_ERROR && AiCheckTrackResources(tile, p->data, cargo))
truelight@0: 				return i;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	return -1;
truelight@0: }
truelight@0: 
truelight@0: static const byte _terraform_up_flags[] = {
truelight@0: 	14, 13, 12, 11,
truelight@0: 	10, 9, 8, 7,
truelight@0: 	6, 5, 4, 3,
truelight@0: 	2, 1, 0, 1,
truelight@0: 	2, 1, 4, 1,
truelight@0: 	2, 1, 8, 1,
truelight@0: 	2, 1, 4, 2,
truelight@0: 	2, 1
truelight@0: };
truelight@0: 
truelight@0: static const byte _terraform_down_flags[] = {
truelight@0: 	1, 2, 3, 4,
truelight@0: 	5, 6, 1, 8,
truelight@0: 	9, 10, 8, 12,
truelight@0: 	4, 2, 0, 0,
truelight@0: 	1, 2, 3, 4,
truelight@0: 	5, 6, 2, 8,
truelight@0: 	9, 10, 1, 12,
truelight@0: 	8, 4
truelight@0: };
truelight@0: 
truelight@0: static void AiDoTerraformLand(TileIndex tile, int dir, int unk, int mode)
truelight@0: {
truelight@0: 	byte old_player;
truelight@0: 	uint32 r;
truelight@0: 	uint slope;
truelight@0: 	int h;
truelight@0: 
truelight@0: 	old_player = _current_player;
truelight@0: 	_current_player = OWNER_NONE;
truelight@0: 
truelight@0: 	r = Random();
truelight@0: 
truelight@0: 	unk &= (int)r;
truelight@0: 
truelight@0: 	do {
truelight@0: 		tile = TILE_MASK(tile + _tileoffs_by_dir[dir]);
truelight@0: 
truelight@0: 		r >>= 2;
truelight@0: 		if (r&2) {
truelight@0: 			dir++;
truelight@0: 			if (r&1)
truelight@0: 				dir -= 2;
truelight@0: 		}
truelight@0: 		dir &= 3;
truelight@0: 	} while (--unk >= 0);
truelight@0: 
truelight@0: 	slope = GetTileSlope(tile, &h);
truelight@0: 	
truelight@0: 	if (slope != 0) {
truelight@0: 		if (mode > 0 || (mode == 0 && !(r&0xC))) {
truelight@0: 			// Terraform up
truelight@0: 			DoCommandByTile(tile, _terraform_up_flags[slope-1], 1,
truelight@0: 				DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_TERRAFORM_LAND);
truelight@0: 		} else if (h != 0) {
truelight@0: 			// Terraform down
truelight@0: 			DoCommandByTile(tile, _terraform_down_flags[slope-1], 0, 
truelight@0: 				DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_TERRAFORM_LAND);
truelight@0: 		}				
truelight@0: 	}
truelight@0: 
truelight@0: 	_current_player = old_player;
truelight@0: }
truelight@0: 
truelight@0: static void AiStateBuildDefaultRailBlocks(Player *p)
truelight@0: {
truelight@0: 	int i, j;
truelight@0: 	AiBuildRec *aib;
truelight@0: 	int rule;
truelight@0: 	int32 cost;
truelight@0: 
truelight@0: 	// time out?
truelight@0: 	if (++p->ai.timeout_counter == 1388) {
truelight@0: 		p->ai.state = AIS_DELETE_RAIL_BLOCKS;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// do the following 8 times
truelight@0: 	i = 8;
truelight@0: 	do {
truelight@0: 		// check if we can build the default track
truelight@0: 		aib = &p->ai.src;
truelight@0: 		j = p->ai.num_build_rec;
truelight@0: 		do {
truelight@0: 			// this item has already been built?
truelight@0: 			if (aib->cur_building_rule != 255)
truelight@0: 				continue;
truelight@0: 
truelight@0: 			// adjust the coordinate randomly,
truelight@0: 			// to make sure that we find a position.
truelight@0: 			aib->use_tile = AdjustTileCoordRandomly(aib->spec_tile, aib->rand_rng);
truelight@0: 
truelight@0: 			// check if the track can be build there.
truelight@0: 			rule = AiBuildDefaultRailTrack(aib->use_tile,
truelight@0: 				p->ai.build_kind, p->ai.num_wagons,
truelight@0: 				aib->unk6, aib->unk7,
truelight@0: 				aib->direction, aib->cargo, &cost);
truelight@0: 
truelight@0: 			if (rule == -1) {
truelight@0: 				// cannot build, terraform after a while
truelight@0: 				if (p->ai.state_counter >= 600) {
truelight@0: 					AiDoTerraformLand(aib->use_tile, Random()&3, 3, (int8)p->ai.state_mode);
truelight@0: 				}
truelight@0: 				// also try the other terraform direction
truelight@0: 				if (++p->ai.state_counter >= 1000) {
truelight@0: 					p->ai.state_counter = 0;
truelight@0: 					p->ai.state_mode = -p->ai.state_mode;
truelight@0: 				}
truelight@0: 			} else if (CheckPlayerHasMoney(cost)) {
truelight@0: 				int32 r;
truelight@0: 				// player has money, build it.
truelight@0: 				aib->cur_building_rule = rule;
truelight@0: 
truelight@0: 				r = AiDoBuildDefaultRailTrack(
truelight@0: 					aib->use_tile,
truelight@0: 					_default_rail_track_data[rule]->data,
truelight@0: 					DC_EXEC | DC_NO_TOWN_RATING
truelight@0: 				);
truelight@0: 				assert(r != CMD_ERROR);
truelight@0: 			}
truelight@0: 		} while (++aib,--j);
truelight@0: 	} while (--i);
truelight@0: 
truelight@0: 	// check if we're done with all of them
truelight@0: 	aib = &p->ai.src;
truelight@0: 	j = p->ai.num_build_rec;
truelight@0: 	do {
truelight@0: 		if (aib->cur_building_rule == 255)
truelight@0: 			return;
truelight@0: 	} while (++aib,--j);
truelight@0: 
truelight@0: 	// yep, all are done. switch state to the rail building state.
truelight@0: 	p->ai.state = AIS_BUILD_RAIL;
truelight@0: 	p->ai.state_mode = 255;
truelight@0: }
truelight@0: 
truelight@0: static TileIndex AiGetEdgeOfDefaultRailBlock(byte rule, TileIndex tile, byte cmd, int *dir)
truelight@0: {
truelight@0: 	const AiDefaultBlockData *p = _default_rail_track_data[rule]->data;
truelight@0: 
truelight@0: 	while (p->mode != 3 || !((--cmd) & 0x80)) p++;
truelight@0: 
truelight@0: 	return tile + p->tileoffs - _tileoffs_by_dir[*dir = p->attr];
truelight@0: }
truelight@0: 
truelight@0: typedef struct AiRailPathFindData {
truelight@0: 	TileIndex tile;
truelight@0: 	TileIndex tile2;
truelight@0: 	int count;
truelight@0: 	bool flag;
truelight@0: } AiRailPathFindData;
truelight@0: 
truelight@0: static bool AiEnumFollowTrack(uint tile, AiRailPathFindData *a, int track, uint length, byte *state)
truelight@0: {
truelight@0: 	if (a->flag)
truelight@0: 		return true;
truelight@0: 
truelight@0: 	if (length > 20 || tile == a->tile) {
truelight@0: 		a->flag = true;
truelight@0: 		return true;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (GetTileDist1D(tile, a->tile2) < 4)
truelight@0: 		a->count++;
truelight@0: 
truelight@0: 	return false;
truelight@0: }
truelight@0: 
truelight@0: static bool AiDoFollowTrack(Player *p)
truelight@0: {
truelight@0: 	AiRailPathFindData arpfd;
truelight@0: 	arpfd.tile = p->ai.start_tile_a;
truelight@0: 	arpfd.tile2 = p->ai.cur_tile_a;
truelight@0: 	arpfd.flag = false;
truelight@0: 	arpfd.count = 0;
truelight@0: 	FollowTrack(p->ai.cur_tile_a + _tileoffs_by_dir[p->ai.cur_dir_a], 0x2000, p->ai.cur_dir_a^2, 
truelight@0: 		(TPFEnumProc*)AiEnumFollowTrack, NULL, &arpfd);
truelight@0: 	return arpfd.count > 8;
truelight@0: }
truelight@0: 
truelight@0: typedef struct AiRailFinder {
truelight@0: 	TileIndex final_tile;
truelight@0: 	byte final_dir;
truelight@0: 	byte depth;
truelight@0: 	byte recursive_mode;
truelight@0: 	byte cur_best_dir;
truelight@0: 	byte best_dir;
truelight@0: 	byte cur_best_depth;
truelight@0: 	byte best_depth;
truelight@0: 	uint cur_best_dist;
truelight@0: 	const byte *best_ptr;
truelight@0: 	uint best_dist;
truelight@0: 	TileIndex cur_best_tile, best_tile;
truelight@0: 	TileIndex bridge_end_tile;
truelight@0: 	Player *player;
truelight@0: 	TileInfo ti;
truelight@0: } AiRailFinder;
truelight@0: 
truelight@0: static const byte _ai_table_15[4][8] = {
truelight@0: 	{0, 0, 4, 3, 3, 1, 128+0, 64},
truelight@0: 	{1, 1, 2, 0, 4, 2, 128+1, 65},
truelight@0: 	{0, 2, 2, 3, 5, 1, 128+2, 66},
truelight@0: 	{1, 3, 5, 0, 3, 2, 128+3, 67}
truelight@0: };
truelight@0: 
truelight@0: static const byte _dir_table_1[] = {3, 9, 12, 6};
truelight@0: static const byte _dir_table_2[] = {12, 6, 3, 9};
truelight@0: 
truelight@0: 
truelight@0: static bool AiIsTileBanned(Player *p, TileIndex tile, byte val) {
truelight@0: 	int i;
truelight@0: 
truelight@0: 	for(i=0; i!=p->ai.banned_tile_count; i++)
truelight@0: 		if (p->ai.banned_tiles[i] == tile && 
truelight@0: 				p->ai.banned_val[i] == val)
truelight@0: 					return true;
truelight@0: 	return false;
truelight@0: }
truelight@0: 
truelight@0: static void AiBanTile(Player *p, TileIndex tile, byte val) {
truelight@0: 	int i;
truelight@0: 
truelight@0: 	for(i=lengthof(p->ai.banned_tiles)-1; i!=0; i--) {
truelight@0: 		p->ai.banned_tiles[i] = p->ai.banned_tiles[i-1];
truelight@0: 		p->ai.banned_val[i] = p->ai.banned_val[i-1];
truelight@0: 	}
truelight@0: 
truelight@0: 	p->ai.banned_tiles[0] = tile;
truelight@0: 	p->ai.banned_val[0] = val;
truelight@0: 
truelight@0: 	if (p->ai.banned_tile_count != lengthof(p->ai.banned_tiles))
truelight@0: 		p->ai.banned_tile_count++;
truelight@0: }
truelight@0: 
truelight@0: static void AiBuildRailRecursive(AiRailFinder *arf, TileIndex tile, int dir);
truelight@0: 
truelight@0: static bool AiCheckRailPathBetter(AiRailFinder *arf, const byte *p)
truelight@0: {
truelight@0: 	bool better = false;
truelight@0: 
truelight@0: 	if (arf->recursive_mode < 1) {
truelight@0: 		// Mode is 0. This means destination has not been found yet.
truelight@0: 		// If the found path is shorter than the current one, remember it.
truelight@0: 		if (arf->cur_best_dist < arf->best_dist) {
truelight@0: 			arf->best_dir = arf->cur_best_dir;
truelight@0: 			arf->best_dist = arf->cur_best_dist;
truelight@0: 			arf->best_ptr = p;
truelight@0: 			arf->best_tile = arf->cur_best_tile;
truelight@0: 			better = true;
truelight@0: 		}	
truelight@0: 	} else if (arf->recursive_mode > 1) {
truelight@0: 		// Mode is 2.
truelight@0: 		if (arf->best_dist != 0 || arf->cur_best_depth < arf->best_depth) {
truelight@0: 			arf->best_depth = arf->cur_best_depth;
truelight@0: 			arf->best_dist = 0;
truelight@0: 			arf->best_ptr = p;
truelight@0: 			arf->best_tile = 0;
truelight@0: 			better = true;
truelight@0: 		}
truelight@0: 	}
truelight@0: 	arf->recursive_mode = 0;
truelight@0: 	arf->cur_best_dist = (uint)-1;
truelight@0: 	arf->cur_best_depth = 0xff;
truelight@0: 
truelight@0: 	return better;
truelight@0: }
truelight@0: 
truelight@0: static void FORCEINLINE AiCheckBuildRailBridgeHere(AiRailFinder *arf, TileIndex tile, const byte *p)
truelight@0: {
truelight@0: 	TileIndex tile_new;
truelight@0: 	bool flag;
truelight@0: 
truelight@0: 	int dir2 = p[0] & 3;
truelight@0: 	
truelight@0: 	FindLandscapeHeightByTile(&arf->ti, tile);
truelight@0: 
truelight@0: 	if (arf->ti.tileh == _dir_table_1[dir2] || (arf->ti.tileh==0 && arf->ti.z!=0)) {
truelight@0: 		tile_new = tile;
truelight@0: 		// Allow bridges directly over bottom tiles
truelight@0: 		flag = arf->ti.z == 0;
truelight@0: 		for(;;) {
truelight@0: 			if (tile_new < -_tileoffs_by_dir[dir2]) return; // Wraping around map, no bridge possible!
truelight@0: 			tile_new = TILE_MASK(tile_new + _tileoffs_by_dir[dir2]);
truelight@0: 			FindLandscapeHeightByTile(&arf->ti, tile_new);
truelight@0: 			if (arf->ti.tileh != 0 || arf->ti.type == MP_CLEAR || arf->ti.type == MP_TREES) {
truelight@0: 				if (!flag) return;
truelight@0: 				break;
truelight@0: 			}
truelight@0: 			if (arf->ti.type != MP_WATER && arf->ti.type != MP_RAILWAY && arf->ti.type != MP_STREET)
truelight@0: 				return;
truelight@0: 			flag = true;
truelight@0: 		}
truelight@0: 
truelight@0: 		// Is building a (rail)bridge possible at this place (type doesn't matter)?
truelight@0: 		if (DoCommandByTile(tile_new, tile, arf->player->ai.railtype_to_use<<8, 
truelight@0: 			DC_AUTO, CMD_BUILD_BRIDGE) == CMD_ERROR)
truelight@0: 				return;
truelight@0: 		AiBuildRailRecursive(arf, tile_new, dir2);
truelight@0: 		
truelight@0: 		// At the bottom depth, check if the new path is better than the old one.
truelight@0: 		if (arf->depth == 1) {
truelight@0: 			if (AiCheckRailPathBetter(arf, p))
truelight@0: 				arf->bridge_end_tile = tile_new;
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void FORCEINLINE AiCheckBuildRailTunnelHere(AiRailFinder *arf, TileIndex tile, const byte *p)
truelight@0: {
truelight@0: 	FindLandscapeHeightByTile(&arf->ti, tile);
truelight@0: 
truelight@0: 	if (arf->ti.tileh == _dir_table_2[p[0]&3] && arf->ti.z!=0) { 
truelight@0: 		int32 cost = DoCommandByTile(tile, arf->player->ai.railtype_to_use, 0, DC_AUTO, CMD_BUILD_TUNNEL);
truelight@0: 
truelight@0: 		if (cost != CMD_ERROR && cost <= (arf->player->player_money>>4)) {
truelight@0: 			AiBuildRailRecursive(arf, _build_tunnel_endtile, p[0]&3);
truelight@0: 			if (arf->depth == 1) {
truelight@0: 				AiCheckRailPathBetter(arf, p);
truelight@0: 			}
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static void AiBuildRailRecursive(AiRailFinder *arf, TileIndex tile, int dir)
truelight@0: {
truelight@0: 	const byte *p;
truelight@0: 
truelight@0: 	tile = TILE_MASK(tile + _tileoffs_by_dir[dir]);
truelight@0: 	
truelight@0: 	// Reached destination?
truelight@0: 	if (tile == arf->final_tile) {
truelight@0: 		if (arf->final_dir != (dir^2)) {
truelight@0: 			if (arf->recursive_mode != 2)
truelight@0: 				arf->recursive_mode = 1;
truelight@0: 		} else if (arf->recursive_mode != 2) {
truelight@0: 			arf->recursive_mode = 2;
truelight@0: 			arf->cur_best_depth = arf->depth;
truelight@0: 		} else {
truelight@0: 			if (arf->depth < arf->cur_best_depth)
truelight@0: 				arf->cur_best_depth = arf->depth;
truelight@0: 		}
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Depth too deep?
truelight@0: 	if (arf->depth >= 4) {
truelight@0: 		uint dist = GetTileDist1Db(tile, arf->final_tile);
truelight@0: 		if (dist < arf->cur_best_dist) {
truelight@0: 			// Store the tile that is closest to the final position.
truelight@0: 			arf->cur_best_depth = arf->depth;
truelight@0: 			arf->cur_best_dist = dist;
truelight@0: 			arf->cur_best_tile = tile;
truelight@0: 			arf->cur_best_dir = dir;
truelight@0: 		}
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Increase recursion depth
truelight@0: 	arf->depth++;
truelight@0: 
truelight@0: 	// Grab pointer to list of stuff that is possible to build
truelight@0: 	p = _ai_table_15[dir];
truelight@0: 
truelight@0: 	// Try to build a single rail in all directions.
truelight@0: 	FindLandscapeHeightByTile(&arf->ti, tile);
truelight@0: 	if (arf->ti.z == 0) {
truelight@0: 		p += 6;
truelight@0: 	} else {
truelight@0: 		do {
truelight@0: 			// Make sure the tile is not in the list of banned tiles and that a rail can be built here.
truelight@0: 			if (!AiIsTileBanned(arf->player, tile, p[0]) &&
truelight@0: 					DoCommandByTile(tile, arf->player->ai.railtype_to_use, p[0], DC_AUTO | DC_NO_WATER | DC_NO_RAIL_OVERLAP, CMD_BUILD_SINGLE_RAIL) != CMD_ERROR) {
truelight@0: 				AiBuildRailRecursive(arf, tile, p[1]);
truelight@0: 			}
truelight@0: 
truelight@0: 			// At the bottom depth?
truelight@0: 			if (arf->depth == 1) {
truelight@0: 				AiCheckRailPathBetter(arf, p);
truelight@0: 			}
truelight@0: 
truelight@0: 			p += 2;
truelight@0: 		} while (!(p[0]&0x80));
truelight@0: 	}
truelight@0: 
truelight@0: 	AiCheckBuildRailBridgeHere(arf, tile, p);
truelight@0: 	AiCheckBuildRailTunnelHere(arf, tile, p+1);
truelight@0: 
truelight@0: 	arf->depth--;
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static const byte _dir_table_3[]= {0x25, 0x2A, 0x19, 0x16};	
truelight@0: 
truelight@0: static void AiBuildRailConstruct(Player *p)
truelight@0: {
truelight@0: 	AiRailFinder arf;
truelight@0: 	int i;
truelight@0: 
truelight@0: 	// Check too much lookahead?
truelight@0: 	if (AiDoFollowTrack(p)) {
truelight@0: 		p->ai.state_counter = (Random()&0xE)+6; // Destruct this amount of blocks
truelight@0: 		p->ai.state_mode = 1; // Start destruct
truelight@0: 		
truelight@0: 		// Ban this tile and don't reach it for a while.
truelight@0: 		AiBanTile(p, p->ai.cur_tile_a, FindFirstBit(GetRailTrackStatus(p->ai.cur_tile_a)));
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Setup recursive finder and call it.
truelight@0: 	arf.player = p;
truelight@0: 	arf.final_tile = p->ai.cur_tile_b;
truelight@0: 	arf.final_dir = p->ai.cur_dir_b;
truelight@0: 	arf.depth = 0;
truelight@0: 	arf.recursive_mode = 0;
truelight@0: 	arf.best_ptr = NULL;
truelight@0: 	arf.cur_best_dist = (uint)-1;
truelight@0: 	arf.cur_best_depth = 0xff;
truelight@0: 	arf.best_dist = (uint)-1;
truelight@0: 	arf.best_depth = 0xff;
truelight@0: 	arf.cur_best_tile = 0;
truelight@0: 	arf.best_tile = 0;
truelight@0: 	AiBuildRailRecursive(&arf, p->ai.cur_tile_a, p->ai.cur_dir_a);		
truelight@0: 
truelight@0: 	// Reached destination?
truelight@0: 	if (arf.recursive_mode == 2 && arf.cur_best_depth == 0) {
truelight@0: 		p->ai.state_mode = 255;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Didn't find anything to build?
truelight@0: 	if (arf.best_ptr == NULL) {
truelight@0: 		// Terraform some
truelight@0: 		for(i=0; i!=5; i++)
truelight@0: 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
truelight@0: 
truelight@0: 		if (++p->ai.state_counter == 21) {
truelight@0: 			p->ai.state_counter = 40;
truelight@0: 			p->ai.state_mode = 1;
truelight@0: 			
truelight@0: 			// Ban this tile
truelight@0: 			AiBanTile(p, p->ai.cur_tile_a, FindFirstBit(GetRailTrackStatus(p->ai.cur_tile_a)));
truelight@0: 		}
truelight@0: 		return;
truelight@0: 	}
truelight@0: 	
truelight@0: 	p->ai.cur_tile_a += _tileoffs_by_dir[p->ai.cur_dir_a];
truelight@0: 
truelight@0: 	if (arf.best_ptr[0]&0x80) {
truelight@0: 		int i;
truelight@0: 		int32 bridge_len = GetBridgeLength(arf.bridge_end_tile, p->ai.cur_tile_a);
truelight@0: 		
truelight@0: 		/*	Figure out what (rail)bridge type to build
truelight@0: 				start with best bridge, then go down to worse and worse bridges
truelight@0: 				unnecessary to check for worse bridge (i=0), since AI will always build that.
truelight@0: 				AI is so fucked up that fixing this small thing will probably not solve a thing
truelight@0: 		*/
truelight@0: 		for(i = 10 + (p->ai.railtype_to_use << 8); i != 0; i--) {
truelight@0: 			if (CheckBridge_Stuff(i, bridge_len)) {
truelight@0: 				int32 cost = DoCommandByTile(arf.bridge_end_tile, p->ai.cur_tile_a, i, DC_AUTO, CMD_BUILD_BRIDGE);
truelight@0: 				if (cost != CMD_ERROR && cost < (p->player_money >> 5))
truelight@0: 					break;
truelight@0: 			}
truelight@0: 		}
truelight@0: 
truelight@0: 		// Build it
truelight@0: 		DoCommandByTile(arf.bridge_end_tile, p->ai.cur_tile_a, i, DC_AUTO | DC_EXEC, CMD_BUILD_BRIDGE);
truelight@0: 
truelight@0: 		p->ai.cur_tile_a = arf.bridge_end_tile;
truelight@0: 		p->ai.state_counter = 0;
truelight@0: 	} else if (arf.best_ptr[0]&0x40) {
truelight@0: 		// tunnel
truelight@0: 		DoCommandByTile(p->ai.cur_tile_a, p->ai.railtype_to_use, 0, DC_AUTO | DC_EXEC, CMD_BUILD_TUNNEL);
truelight@0: 		p->ai.cur_tile_a = _build_tunnel_endtile;
truelight@0: 		p->ai.state_counter = 0;
truelight@0: 	} else {
truelight@0: 		// rail
truelight@0: 		p->ai.cur_dir_a = arf.best_ptr[1];
truelight@0: 		DoCommandByTile(p->ai.cur_tile_a, p->ai.railtype_to_use, arf.best_ptr[0], 
truelight@0: 			DC_EXEC | DC_AUTO | DC_NO_WATER | DC_NO_RAIL_OVERLAP, CMD_BUILD_SINGLE_RAIL);
truelight@0: 		p->ai.state_counter = 0;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (arf.best_tile != 0) {
truelight@0: 		for(i=0; i!=2; i++)
truelight@0: 			AiDoTerraformLand(arf.best_tile, arf.best_dir, 3, 0);
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static bool AiRemoveTileAndGoForward(Player *p)
truelight@0: {
truelight@0: 	byte b;
truelight@0: 	int bit;
truelight@0: 	const byte *ptr;
truelight@0: 	uint tile = p->ai.cur_tile_a;
truelight@0: 	int offs;
truelight@0: 	TileIndex tilenew;
truelight@0: 
truelight@0: 	if (IS_TILETYPE(tile, MP_TUNNELBRIDGE)) {
truelight@0: 		if (!(_map5[tile] & 0x80)) {
truelight@0: 			// Clear the tunnel and continue at the other side of it.
truelight@0: 			if (DoCommandByTile(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR) == CMD_ERROR)
truelight@0: 				return false;
truelight@0: 			p->ai.cur_tile_a = TILE_MASK(_build_tunnel_endtile - _tileoffs_by_dir[p->ai.cur_dir_a]);
truelight@0: 			return true;
truelight@0: 		}
truelight@0: 
truelight@0: 		if (!(_map5[tile] & 0x40)) {
truelight@0: 			
truelight@0: 			// Check if the bridge points in the right direction.
truelight@0: 			// This is not really needed the first place AiRemoveTileAndGoForward is called.
truelight@0: 			if ((_map5[tile]&1) != (p->ai.cur_dir_a&1))
truelight@0: 				return false;
truelight@0: 
truelight@0: 			// Find other side of bridge.
truelight@0: 			offs = _tileoffs_by_dir[p->ai.cur_dir_a];
truelight@0: 			do {
truelight@0: 				tile = TILE_MASK(tile - offs);
truelight@0: 			} while (_map5[tile] & 0x40);
truelight@0: 			
truelight@0: 			tilenew = TILE_MASK(tile - offs);
truelight@0: 			// And clear the bridge.
truelight@0: 			if (DoCommandByTile(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR) == CMD_ERROR)
truelight@0: 				return false;
truelight@0: 			p->ai.cur_tile_a = tilenew;
truelight@0: 			return true;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	// Find the railtype at the position. Quit if no rail there.
truelight@0: 	b = GetRailTrackStatus(tile) & _dir_table_3[p->ai.cur_dir_a];
truelight@0: 	if (b == 0)
truelight@0: 		return false;
truelight@0: 
truelight@0: 	// Convert into a bit position that CMD_REMOVE_SINGLE_RAIL expects.
truelight@0: 	bit = FindFirstBit(b);
truelight@0: 
truelight@0: 	// Then remove and signals if there are any.
truelight@0: 	if (IS_TILETYPE(tile, MP_RAILWAY) &&
truelight@0: 			(_map5[tile]&0xC0) == 0x40) {
truelight@0: 		DoCommandByTile(tile, 0, 0, DC_EXEC, CMD_REMOVE_SIGNALS);
truelight@0: 	}
truelight@0: 	
truelight@0: 	// And also remove the rail.
truelight@0: 	if (DoCommandByTile(tile, 0, bit, DC_EXEC, CMD_REMOVE_SINGLE_RAIL) == CMD_ERROR)
truelight@0: 		return false;
truelight@0: 
truelight@0: 	// Find the direction at the other edge of the rail.
truelight@0: 	ptr = _ai_table_15[p->ai.cur_dir_a^2];
truelight@0: 	while (ptr[0] != bit) ptr+=2;
truelight@0: 	p->ai.cur_dir_a = ptr[1] ^ 2;
truelight@0: 	
truelight@0: 	// And then also switch tile.
truelight@0: 	p->ai.cur_tile_a = TILE_MASK(p->ai.cur_tile_a - _tileoffs_by_dir[p->ai.cur_dir_a]);
truelight@0: 
truelight@0: 	return true;
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static void AiBuildRailDestruct(Player *p)
truelight@0: {
truelight@0: 	// Decrease timeout.
truelight@0: 	if (!--p->ai.state_counter) {
truelight@0: 		p->ai.state_mode = 2;
truelight@0: 		p->ai.state_counter = 0;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Don't do anything if the destination is already reached.
truelight@0: 	if (p->ai.cur_tile_a == p->ai.start_tile_a)
truelight@0: 		return;
truelight@0: 
truelight@0: 	AiRemoveTileAndGoForward(p);	
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static void AiBuildRail(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 
truelight@0: 	if (p->ai.state_mode < 1) {
truelight@0: 		// Construct mode, build new rail.
truelight@0: 		AiBuildRailConstruct(p);		
truelight@0: 	} else if (p->ai.state_mode == 1) {
truelight@0: 		
truelight@0: 		// Destruct mode, destroy the rail currently built.
truelight@0: 		AiBuildRailDestruct(p);
truelight@0: 	} else if (p->ai.state_mode == 2) {
truelight@0: 
truelight@0: 		// Terraform some and then try building again.
truelight@0: 		for(i=0; i!=4; i++)
truelight@0: 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
truelight@0: 
truelight@0: 		if (++p->ai.state_counter == 4) {
truelight@0: 			p->ai.state_counter = 0;
truelight@0: 			p->ai.state_mode = 0;
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiStateBuildRail(Player *p)
truelight@0: {
truelight@0: 	int num;
truelight@0: 	AiBuildRec *aib;
truelight@0: 	byte cmd;
truelight@0: 	TileIndex tile;
truelight@0: 	int dir;
truelight@0: 
truelight@0: 	// time out?
truelight@0: 	if (++p->ai.timeout_counter == 1388) {
truelight@0: 		p->ai.state = AIS_DELETE_RAIL_BLOCKS;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Currently building a rail between two points?
truelight@0: 	if (p->ai.state_mode != 255) {
truelight@0: 		AiBuildRail(p);
truelight@0: 		
truelight@0: 		// Alternate between edges
truelight@0: 		swap_tile(&p->ai.start_tile_a, &p->ai.start_tile_b);
truelight@0: 		swap_tile(&p->ai.cur_tile_a, &p->ai.cur_tile_b);
truelight@0: 		swap_byte(&p->ai.start_dir_a, &p->ai.start_dir_b);
truelight@0: 		swap_byte(&p->ai.cur_dir_a, &p->ai.cur_dir_b);
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Now, find two new points to build between
truelight@0: 	num = p->ai.num_build_rec;
truelight@0: 	aib = &p->ai.src;
truelight@0: 
truelight@0: 	for(;;) {
truelight@0: 		cmd = aib->buildcmd_a;
truelight@0: 		aib->buildcmd_a = 255;
truelight@0: 		if (cmd != 255) break;
truelight@0: 
truelight@0: 		cmd = aib->buildcmd_b;
truelight@0: 		aib->buildcmd_b = 255;
truelight@0: 		if (cmd != 255) break;
truelight@0: 
truelight@0: 		aib++;
truelight@0: 		if (--num == 0) {
truelight@0: 			p->ai.state = AIS_BUILD_RAIL_VEH;
truelight@0: 			p->ai.state_counter = 0; // timeout
truelight@0: 			return;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	// Find first edge to build from.
truelight@0: 	tile = AiGetEdgeOfDefaultRailBlock(aib->cur_building_rule, aib->use_tile, cmd&3, &dir);
truelight@0: 	p->ai.start_tile_a = tile;
truelight@0: 	p->ai.cur_tile_a = tile;
truelight@0: 	p->ai.start_dir_a = dir;
truelight@0: 	p->ai.cur_dir_a = dir;
truelight@0: 	DoCommandByTile(TILE_MASK(tile + _tileoffs_by_dir[dir]), 0, (dir&1)?1:0, DC_EXEC, CMD_REMOVE_SINGLE_RAIL);
truelight@0: 
truelight@0: 	assert(TILE_MASK(tile) != 0xFF00);
truelight@0: 
truelight@0: 	// Find second edge to build to
truelight@0: 	aib = (&p->ai.src) + ((cmd >> 4)&0xF);
truelight@0: 	tile = AiGetEdgeOfDefaultRailBlock(aib->cur_building_rule, aib->use_tile, (cmd>>2)&3, &dir);
truelight@0: 	p->ai.start_tile_b = tile;
truelight@0: 	p->ai.cur_tile_b = tile;
truelight@0: 	p->ai.start_dir_b = dir;
truelight@0: 	p->ai.cur_dir_b = dir;
truelight@0: 	DoCommandByTile(TILE_MASK(tile + _tileoffs_by_dir[dir]), 0, (dir&1)?1:0, DC_EXEC, CMD_REMOVE_SINGLE_RAIL);
truelight@0: 
truelight@0: 	assert(TILE_MASK(tile) != 0xFF00);
truelight@0: 
truelight@0: 	// And setup state.
truelight@0: 	p->ai.state_mode = 2;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.banned_tile_count = 0;
truelight@0: }
truelight@0: 
truelight@0: static int AiGetStationIdByDef(TileIndex tile, int id)
truelight@0: {
truelight@0: 	const AiDefaultBlockData *p = _default_rail_track_data[id]->data;
truelight@0: 	while (p->mode != 1) p++;
truelight@0: 	return _map2[TILE_ADD(tile,p->tileoffs)];
truelight@0: }
truelight@0: 
truelight@0: static void AiStateBuildRailVeh(Player *p)
truelight@0: {
truelight@0: 	const AiDefaultBlockData *ptr;
truelight@0: 	TileIndex tile;
truelight@0: 	int i, veh;
truelight@0: 	int cargo;
truelight@0: 	int32 cost;
truelight@0: 	Vehicle *v;
truelight@0: 	uint loco_id;
truelight@0: 
truelight@0: 	ptr = _default_rail_track_data[p->ai.src.cur_building_rule]->data;
truelight@0: 	while (ptr->mode != 0) {	ptr++; }
truelight@0: 
truelight@0: 	tile = TILE_ADD(p->ai.src.use_tile, ptr->tileoffs);
truelight@0: 
truelight@0: 	cargo = p->ai.cargo_type;
truelight@0: 	for(i=0;;) {
truelight@0: 		if (p->ai.wagon_list[i] == INVALID_VEHICLE) {
truelight@0: 			veh = _cargoc.ai_railwagon[p->ai.railtype_to_use][cargo];
truelight@0: 			cost = DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE);
truelight@0: 			if (cost == CMD_ERROR) goto handle_nocash;
truelight@0: 			p->ai.wagon_list[i] = _new_wagon_id;
truelight@0: 			p->ai.wagon_list[i+1] = INVALID_VEHICLE;
truelight@0: 			return;
truelight@0: 		}
truelight@0: 		if (cargo == CT_MAIL)
truelight@0: 			cargo = CT_PASSENGERS;
truelight@0: 		if (++i == p->ai.num_wagons * 2 - 1)
truelight@0: 			break;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Which locomotive to build?
truelight@0: 	veh = AiChooseTrainToBuild(p->ai.railtype_to_use, p->player_money, (cargo!=CT_PASSENGERS)?1:0);
truelight@0: 	if (veh == -1) {
truelight@0: handle_nocash:
truelight@0: 		// after a while, if AI still doesn't have cash, get out of this block by selling the wagons.
truelight@0: 		if (++p->ai.state_counter == 1000) {
truelight@0: 			for(i=0; p->ai.wagon_list[i] != INVALID_VEHICLE; i++) {
truelight@0: 				cost = DoCommandByTile(tile, p->ai.wagon_list[i], 0, DC_EXEC, CMD_SELL_RAIL_WAGON);
truelight@0: 				assert(cost != CMD_ERROR);
truelight@0: 			}
truelight@0: 			p->ai.state =	AIS_0;
truelight@0: 		}
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Try to build the locomotive
truelight@0: 	cost = DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE);
truelight@0: 	assert(cost != CMD_ERROR);
truelight@0: 	loco_id = _new_train_id;
truelight@0: 
truelight@0: 	// Sell a vehicle if the train is double headed.
truelight@0: 	v = &_vehicles[loco_id];
truelight@0: 	if (v->next != NULL) {
truelight@0: 		i = p->ai.wagon_list[p->ai.num_wagons*2-2];
truelight@0: 		p->ai.wagon_list[p->ai.num_wagons*2-2] = INVALID_VEHICLE;
truelight@0: 		DoCommandByTile(tile, i, 0, DC_EXEC, CMD_SELL_RAIL_WAGON);
truelight@0: 	}
truelight@0: 
truelight@0: 	// Move the wagons onto the train
truelight@0: 	for(i=0; p->ai.wagon_list[i] != INVALID_VEHICLE; i++) {
truelight@0: 		DoCommandByTile(tile, p->ai.wagon_list[i] | (loco_id << 16), 0, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);
truelight@0: 	}
truelight@0: 
truelight@0: 	for(i=0; p->ai.order_list_blocks[i] != 0xFF; i++) {
truelight@0: 		AiBuildRec *aib = (&p->ai.src) + p->ai.order_list_blocks[i];
truelight@0: 		uint flags = (AiGetStationIdByDef(aib->use_tile, aib->cur_building_rule) << 8) + OT_GOTO_STATION;
truelight@0: 		bool is_pass = (p->ai.cargo_type == CT_PASSENGERS ||
truelight@0: 							p->ai.cargo_type == CT_MAIL ||
truelight@0: 							(_opt.landscape==LT_NORMAL && p->ai.cargo_type == CT_VALUABLES));
truelight@0: 		
truelight@0: 		if (!is_pass && i == 1) flags |= OF_UNLOAD;
truelight@0: 		if (p->ai.num_want_fullload != 0 && (is_pass || i == 0)) flags |= OF_FULL_LOAD;
truelight@0: 
truelight@0: 		DoCommandByTile(0, loco_id + (i << 16),	flags, DC_EXEC, CMD_INSERT_ORDER);
truelight@0: 	}
truelight@0: 
truelight@0: 	DoCommandByTile(0, loco_id, 0, DC_EXEC, CMD_START_STOP_TRAIN);
truelight@0: 
truelight@0: 	if (p->ai.num_want_fullload != 0)
truelight@0: 		p->ai.num_want_fullload--;
truelight@0: 
truelight@0: 	if (--p->ai.num_loco_to_build != 0) {
truelight@0: //		p->ai.loco_id = INVALID_VEHICLE;
truelight@0: 		p->ai.wagon_list[0] = INVALID_VEHICLE;
truelight@0: 	} else {
truelight@0: 		p->ai.state =	AIS_0;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiStateDeleteRailBlocks(Player *p)
truelight@0: {
truelight@0: 	int num;
truelight@0: 	AiBuildRec *aib;
truelight@0: 	const AiDefaultBlockData *b;
truelight@0: 
truelight@0: 	num = p->ai.num_build_rec;	
truelight@0: 	aib = &p->ai.src;
truelight@0: 	do {
truelight@0: 		if (aib->cur_building_rule != 255) {
truelight@0: 			b = _default_rail_track_data[aib->cur_building_rule]->data;
truelight@0: 			while (b->mode != 4) {
truelight@0: 				DoCommandByTile(TILE_ADD(aib->use_tile, b->tileoffs), 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@0: 				b++;
truelight@0: 			}
truelight@0: 		}
truelight@0: 	} while (++aib,--num);
truelight@0: 
truelight@0: 	p->ai.state = AIS_0;
truelight@0: }
truelight@0: 
truelight@0: static bool AiCheckRoadResources(TileIndex tile, const AiDefaultBlockData *p, byte cargo)
truelight@0: {
truelight@0: 	uint values[NUM_CARGO];
truelight@0: 	for(;;p++) {
truelight@0: 		if (p->mode == 4) {
truelight@0: 			return true;
truelight@0: 		} else if (p->mode == 1) {
truelight@0: 			uint tile2 = TILE_ADD(tile, p->tileoffs);
truelight@0: 			if (cargo & 0x80) {
truelight@0: 				GetProductionAroundTiles(values, tile2, 1, 1);
truelight@0: 				return values[cargo & 0x7F] != 0;
truelight@0: 			} else {
truelight@0: 				GetAcceptanceAroundTiles(values, tile2, 1, 1);
truelight@0: 				return (values[cargo]&~7) != 0;
truelight@0: 			}
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static bool _want_road_truck_station;
truelight@0: static int32 AiDoBuildDefaultRoadBlock(TileIndex tile, const AiDefaultBlockData *p, byte flag);
truelight@0: 
truelight@0: // Returns rule and cost
truelight@0: static int AiFindBestDefaultRoadBlock(TileIndex tile, byte direction, byte cargo, int32 *cost)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	const AiDefaultRoadBlock *p;
truelight@0: 
truelight@0: 	_want_road_truck_station = (cargo & 0x7F) != CT_PASSENGERS;
truelight@0: 
truelight@0: 	for(i=0; (p = _road_default_block_data[i]) != NULL; i++) {
truelight@0: 		if (p->dir == direction) {
truelight@0: 			*cost = AiDoBuildDefaultRoadBlock(tile, p->data, 0);
truelight@0: 			if (*cost != CMD_ERROR && AiCheckRoadResources(tile, p->data, cargo))
truelight@0: 				return i;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	return -1;
truelight@0: }
truelight@0: 
truelight@0: static int32 AiDoBuildDefaultRoadBlock(TileIndex tile, const AiDefaultBlockData *p, byte flag)
truelight@0: {
truelight@0: 	int32 r;
truelight@0: 	int32 total_cost = 0;
truelight@0: 	Town *t = NULL;
truelight@0: 	int rating = 0;
truelight@0: 	int roadflag = 0;
truelight@0: 
truelight@0: 	for(;p->mode != 4;p++) {
truelight@0: 		uint c = TILE_MASK(tile+ p->tileoffs);
truelight@0: 
truelight@0: 		_cleared_town = NULL;
truelight@0: 	
truelight@0: 		if (p->mode == 2) {
truelight@0: 			if (IS_TILETYPE(c, MP_STREET) &&
truelight@0: 					(_map5[c]&0xF0)==0 &&
truelight@0: 					(_map5[c]&p->attr)!=0) {
truelight@0: 				roadflag |= 2;
truelight@0: 				
truelight@0: 				// all bits are already built?
truelight@0: 				if ((_map5[c]&p->attr)==p->attr)
truelight@0: 					continue;
truelight@0: 			}
truelight@0: 
truelight@0: 			r = DoCommandByTile(c, p->attr, 0, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD);
truelight@0: 			if (r == CMD_ERROR)
truelight@0: 				return CMD_ERROR;
truelight@0: 			total_cost += r;
truelight@0: 
truelight@0: 			continue;
truelight@0: 		}
truelight@0: 
truelight@0: 		if (p->mode == 0) {
truelight@0: 			// Depot
truelight@0: 			r = DoCommandByTile(c, p->attr, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_ROAD_DEPOT);
truelight@0: 			goto clear_town_stuff;
truelight@0: 		} else if (p->mode == 1) {
truelight@0: 			if (_want_road_truck_station) {
truelight@0: 				// Truck station
truelight@0: 				r = DoCommandByTile(c, p->attr, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_TRUCK_STATION);
truelight@0: 			} else {
truelight@0: 				// Bus station
truelight@0: 				r = DoCommandByTile(c, p->attr, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_BUS_STATION);
truelight@0: 			}
truelight@0: clear_town_stuff:;
truelight@0: 
truelight@0: 			if (r == CMD_ERROR) return CMD_ERROR;
truelight@0: 			total_cost += r;
truelight@0: 
truelight@0: 			if (_cleared_town != NULL) {
truelight@0: 				if (t != NULL && t != _cleared_town)
truelight@0: 					return CMD_ERROR;
truelight@0: 				t = _cleared_town;
truelight@0: 				rating += _cleared_town_rating;
truelight@0: 			}
truelight@0: 		} else if (p->mode == 3) {
truelight@0: 			if (flag & DC_EXEC)
truelight@0: 				continue;
truelight@0: 
truelight@0: 			if (GetTileSlope(c, NULL) != 0)
truelight@0: 				return CMD_ERROR;
truelight@0: 
truelight@0: 			if (!(IS_TILETYPE(c, MP_STREET) && (_map5[c]&0xF0)==0)) {
truelight@0: 				r = DoCommandByTile(c, 0, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_LANDSCAPE_CLEAR);
truelight@0: 				if (r == CMD_ERROR) return CMD_ERROR;
truelight@0: 			}
truelight@0: 		
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	if (!_want_road_truck_station && !(roadflag&2))
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 	if (!(flag & DC_EXEC)) {
truelight@0: 		if (t != NULL && rating > t->ratings[_current_player]) {
truelight@0: 			return CMD_ERROR;
truelight@0: 		}
truelight@0: 	}
truelight@0: 	return total_cost;
truelight@0: }
truelight@0: 
truelight@0: // Make sure the blocks are not too close to each other
truelight@0: static bool AiCheckBlockDistances(Player *p, TileIndex tile)
truelight@0: {
truelight@0: 	AiBuildRec *aib;
truelight@0: 	int num;
truelight@0: 	
truelight@0: 	num = p->ai.num_build_rec;
truelight@0: 	aib = &p->ai.src;	
truelight@0: 
truelight@0: 	do {
truelight@0: 		if (aib->cur_building_rule != 255) {
truelight@0: 			if (GetTileDist(aib->use_tile, tile) < 9)
truelight@0: 				return false;
truelight@0: 		}
truelight@0: 	} while (++aib, --num);
truelight@0: 
truelight@0: 	return true;
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static void AiStateBuildDefaultRoadBlocks(Player *p)
truelight@0: {
truelight@0: 	int i, j;
truelight@0: 	AiBuildRec *aib;
truelight@0: 	int rule;
truelight@0: 	int32 cost;
truelight@0: 
truelight@0: 	// time out?
truelight@0: 	if (++p->ai.timeout_counter == 1388) {
truelight@0: 		p->ai.state = AIS_DELETE_RAIL_BLOCKS;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// do the following 8 times
truelight@0: 	i = 8;
truelight@0: 	do {
truelight@0: 		// check if we can build the default track
truelight@0: 		aib = &p->ai.src;
truelight@0: 		j = p->ai.num_build_rec;
truelight@0: 		do {
truelight@0: 			// this item has already been built?
truelight@0: 			if (aib->cur_building_rule != 255)
truelight@0: 				continue;
truelight@0: 
truelight@0: 			// adjust the coordinate randomly,
truelight@0: 			// to make sure that we find a position.
truelight@0: 			aib->use_tile = AdjustTileCoordRandomly(aib->spec_tile, aib->rand_rng);
truelight@0: 
truelight@0: 			// check if the road can be built there.
truelight@0: 			rule = AiFindBestDefaultRoadBlock(aib->use_tile,
truelight@0: 				aib->direction, aib->cargo, &cost);
truelight@0: 
truelight@0: 			if (rule == -1) {
truelight@0: 				// cannot build, terraform after a while
truelight@0: 				if (p->ai.state_counter >= 600) {
truelight@0: 					AiDoTerraformLand(aib->use_tile, Random()&3, 3, (int8)p->ai.state_mode);
truelight@0: 				}
truelight@0: 				// also try the other terraform direction
truelight@0: 				if (++p->ai.state_counter >= 1000) {
truelight@0: 					p->ai.state_counter = 0;
truelight@0: 					p->ai.state_mode = -p->ai.state_mode;
truelight@0: 				}
truelight@0: 			} else if (CheckPlayerHasMoney(cost) && AiCheckBlockDistances(p,aib->use_tile)) {
truelight@0: 				int32 r;
truelight@0: 
truelight@0: 				// player has money, build it.
truelight@0: 				aib->cur_building_rule = rule;
truelight@0: 
truelight@0: 				r = AiDoBuildDefaultRoadBlock(
truelight@0: 					aib->use_tile,
truelight@0: 					_road_default_block_data[rule]->data,
truelight@0: 					DC_EXEC | DC_NO_TOWN_RATING
truelight@0: 				);
truelight@0: 				assert(r != CMD_ERROR);
truelight@0: 			}
truelight@0: 		} while (++aib,--j);
truelight@0: 	} while (--i);
truelight@0: 
truelight@0: 	// check if we're done with all of them
truelight@0: 	aib = &p->ai.src;
truelight@0: 	j = p->ai.num_build_rec;
truelight@0: 	do {
truelight@0: 		if (aib->cur_building_rule == 255)
truelight@0: 			return;
truelight@0: 	} while (++aib,--j);
truelight@0: 
truelight@0: 	// yep, all are done. switch state to the rail building state.
truelight@0: 	p->ai.state = AIS_BUILD_ROAD;
truelight@0: 	p->ai.state_mode = 255;
truelight@0: }
truelight@0: 
truelight@0: typedef struct {
truelight@0: 	TileIndex final_tile;
truelight@0: 	byte final_dir;
truelight@0: 	byte depth;
truelight@0: 	byte recursive_mode;
truelight@0: 	byte cur_best_dir;
truelight@0: 	byte best_dir;
truelight@0: 	byte cur_best_depth;
truelight@0: 	byte best_depth;
truelight@0: 	uint cur_best_dist;
truelight@0: 	const byte *best_ptr;
truelight@0: 	uint best_dist;
truelight@0: 	TileIndex cur_best_tile, best_tile;
truelight@0: 	TileIndex bridge_end_tile;
truelight@0: 	Player *player;
truelight@0: 	TileInfo ti;
truelight@0: } AiRoadFinder;
truelight@0: 
truelight@0: typedef struct AiRoadEnum {
truelight@0: 	TileIndex dest;
truelight@0: 	TileIndex best_tile;
truelight@0: 	int best_track;
truelight@0: 	uint best_dist;
truelight@0: } AiRoadEnum;
truelight@0: 
truelight@0: static const byte _dir_by_track[] = {
truelight@0: 	0,1,0,1,2,1, 0,0,
truelight@0: 	2,3,3,2,3,0,
truelight@0: };
truelight@0: 
truelight@0: static void AiBuildRoadRecursive(AiRoadFinder *arf, TileIndex tile, int dir);
truelight@0: 
truelight@0: static bool AiCheckRoadPathBetter(AiRoadFinder *arf, const byte *p)
truelight@0: {
truelight@0: 	bool better = false;
truelight@0: 
truelight@0: 	if (arf->recursive_mode < 1) {
truelight@0: 		// Mode is 0. This means destination has not been found yet.
truelight@0: 		// If the found path is shorter than the current one, remember it.
truelight@0: 		if (arf->cur_best_dist < arf->best_dist || 
truelight@0: 			(arf->cur_best_dist == arf->best_dist && arf->cur_best_depth < arf->best_depth)) {
truelight@0: 			arf->best_depth = arf->cur_best_depth;
truelight@0: 			arf->best_dist = arf->cur_best_dist;
truelight@0: 			arf->best_dir = arf->cur_best_dir;
truelight@0: 			arf->best_ptr = p;
truelight@0: 			arf->best_tile = arf->cur_best_tile;
truelight@0: 			better = true;
truelight@0: 		}	
truelight@0: 	} else if (arf->recursive_mode > 1) {
truelight@0: 		// Mode is 2.
truelight@0: 		if (arf->best_dist != 0 || arf->cur_best_depth < arf->best_depth) {
truelight@0: 			arf->best_depth = arf->cur_best_depth;
truelight@0: 			arf->best_dist = 0;
truelight@0: 			arf->best_ptr = p;
truelight@0: 			arf->best_tile = 0;
truelight@0: 			better = true;
truelight@0: 		}
truelight@0: 	}
truelight@0: 	arf->recursive_mode = 0;
truelight@0: 	arf->cur_best_dist = (uint)-1;
truelight@0: 	arf->cur_best_depth = 0xff;
truelight@0: 
truelight@0: 	return better;
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static bool AiEnumFollowRoad(uint tile, AiRoadEnum *a, int track, uint length, byte *state)
truelight@0: {
truelight@0: 	uint dist = GetTileDist(tile, a->dest);
truelight@0: 	uint tile2;
truelight@0: 
truelight@0: 	if (dist <= a->best_dist) {
truelight@0: 		tile2 = TILE_MASK(tile + _tileoffs_by_dir[_dir_by_track[track]]);
truelight@0: 		if (IS_TILETYPE(tile2, MP_STREET) &&
truelight@0: 				(_map5[tile2]&0xF0) == 0) {
truelight@0: 			a->best_dist = dist;
truelight@0: 			a->best_tile = tile;
truelight@0: 			a->best_track = track;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	return false;
truelight@0: }
truelight@0: 
truelight@0: static const uint16 _ai_road_table_and[4] = {
truelight@0: 	0x1009,
truelight@0: 	0x16,
truelight@0: 	0x520,
truelight@0: 	0x2A00,
truelight@0: };
truelight@0: 
truelight@0: bool AiCheckRoadFinished(Player *p)
truelight@0: {
truelight@0: 	AiRoadEnum are;
truelight@0: 	uint tile;
truelight@0: 	int dir = p->ai.cur_dir_a;
truelight@0: 	uint32 bits;
truelight@0: 	int i;
truelight@0: 
truelight@0: 	are.dest = p->ai.cur_tile_b;
truelight@0: 	tile = TILE_MASK(p->ai.cur_tile_a + _tileoffs_by_dir[dir]);
truelight@0: 
truelight@0: 	bits = GetTileTrackStatus(tile, 2) & _ai_road_table_and[dir];
truelight@0: 	if (bits == 0) {
truelight@0: 		return false;
truelight@0: 	}
truelight@0: 
truelight@0: 	are.best_dist = (uint)-1;
truelight@0: 
truelight@0: 	for_each_bit(i, bits) {
truelight@0: 		FollowTrack(tile, 0x3002, _dir_by_track[i], (TPFEnumProc*)AiEnumFollowRoad, NULL, &are);
truelight@0: 	}
truelight@0: 
truelight@0: 	if (GetTileDist(tile, are.dest) <= are.best_dist)
truelight@0: 		return false;
truelight@0: 
truelight@0: 	if (are.best_dist == 0)
truelight@0: 		return true;
truelight@0: 
truelight@0: 	p->ai.cur_tile_a = are.best_tile;
truelight@0: 	p->ai.cur_dir_a = _dir_by_track[are.best_track];
truelight@0: 	return false;
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static bool AiBuildRoadHelper(uint tile, int flags, int type)
truelight@0: {
truelight@0: 	static const byte _road_bits[] = {
truelight@0: 		8+2,
truelight@0: 		1+4,
truelight@0: 		1+8,
truelight@0: 		4+2,
truelight@0: 		1+2,
truelight@0: 		8+4,
truelight@0: 	};
truelight@0: 	return DoCommandByTile(tile, _road_bits[type], 0, flags, CMD_BUILD_ROAD) != CMD_ERROR;
truelight@0: }
truelight@0: 
truelight@0: static void FORCEINLINE AiCheckBuildRoadBridgeHere(AiRoadFinder *arf, TileIndex tile, const byte *p)
truelight@0: {
truelight@0: 	TileIndex tile_new;
truelight@0: 	bool flag;
truelight@0: 
truelight@0: 	int dir2 = p[0] & 3;
truelight@0: 	
truelight@0: 	FindLandscapeHeightByTile(&arf->ti, tile);
truelight@0: 	if (arf->ti.tileh == _dir_table_1[dir2] || (arf->ti.tileh==0 && arf->ti.z!=0)) {
truelight@0: 		tile_new = tile;
truelight@0: 		// Allow bridges directly over bottom tiles
truelight@0: 		flag = arf->ti.z == 0;
truelight@0: 		for(;;) {
truelight@0: 			if (tile_new < -_tileoffs_by_dir[dir2]) return; // Wraping around map, no bridge possible!		
truelight@0: 			tile_new = TILE_MASK(tile_new + _tileoffs_by_dir[dir2]);
truelight@0: 			FindLandscapeHeightByTile(&arf->ti, tile_new);
truelight@0: 			if (arf->ti.tileh != 0 || arf->ti.type == MP_CLEAR || arf->ti.type == MP_TREES) {
truelight@0: 				// Allow a bridge if either we have a tile that's water, rail or street,
truelight@0: 				// or if we found an up tile.
truelight@0: 				if (!flag) return;
truelight@0: 				break;
truelight@0: 			}
truelight@0: 			if (arf->ti.type != MP_WATER && arf->ti.type != MP_RAILWAY && arf->ti.type != MP_STREET)
truelight@0: 				return;
truelight@0: 			flag = true;
truelight@0: 		}
truelight@0: 
truelight@0: 		// Is building a (rail)bridge possible at this place (type doesn't matter)?
truelight@0: 		if (DoCommandByTile(tile_new, tile, 0x8000, DC_AUTO, CMD_BUILD_BRIDGE) == CMD_ERROR)
truelight@0: 			return;
truelight@0: 		AiBuildRoadRecursive(arf, tile_new, dir2);
truelight@0: 		
truelight@0: 		// At the bottom depth, check if the new path is better than the old one.
truelight@0: 		if (arf->depth == 1) {
truelight@0: 			if (AiCheckRoadPathBetter(arf, p))
truelight@0: 				arf->bridge_end_tile = tile_new;
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void FORCEINLINE AiCheckBuildRoadTunnelHere(AiRoadFinder *arf, TileIndex tile, const byte *p)
truelight@0: {
truelight@0: 	FindLandscapeHeightByTile(&arf->ti, tile);
truelight@0: 
truelight@0: 	if (arf->ti.tileh == _dir_table_2[p[0]&3] && arf->ti.z!=0) { 
truelight@0: 		int32 cost = DoCommandByTile(tile, 0x200, 0, DC_AUTO, CMD_BUILD_TUNNEL);
truelight@0: 
truelight@0: 		if (cost != CMD_ERROR && cost <= (arf->player->player_money>>4)) {
truelight@0: 			AiBuildRoadRecursive(arf, _build_tunnel_endtile, p[0]&3);
truelight@0: 			if (arf->depth == 1) {
truelight@0: 				AiCheckRoadPathBetter(arf, p);
truelight@0: 			}
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: 
truelight@0: static void AiBuildRoadRecursive(AiRoadFinder *arf, TileIndex tile, int dir)
truelight@0: {
truelight@0: 	const byte *p;
truelight@0: 
truelight@0: 	tile = TILE_MASK(tile + _tileoffs_by_dir[dir]);
truelight@0: 	
truelight@0: 	// Reached destination?
truelight@0: 	if (tile == arf->final_tile) {
truelight@0: 		if ((arf->final_dir^2) == dir) {
truelight@0: 			arf->recursive_mode = 2;
truelight@0: 			arf->cur_best_depth = arf->depth;
truelight@0: 		} 
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Depth too deep?
truelight@0: 	if (arf->depth >= 4) {
truelight@0: 		uint dist = GetTileDist1Db(tile, arf->final_tile);
truelight@0: 		if (dist < arf->cur_best_dist) {
truelight@0: 			// Store the tile that is closest to the final position.
truelight@0: 			arf->cur_best_dist = dist;
truelight@0: 			arf->cur_best_tile = tile;
truelight@0: 			arf->cur_best_dir = dir;
truelight@0: 			arf->cur_best_depth = arf->depth;
truelight@0: 		}
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Increase recursion depth
truelight@0: 	arf->depth++;
truelight@0: 
truelight@0: 	// Grab pointer to list of stuff that is possible to build
truelight@0: 	p = _ai_table_15[dir];
truelight@0: 
truelight@0: 	// Try to build a single rail in all directions.
truelight@0: 	FindLandscapeHeightByTile(&arf->ti, tile);
truelight@0: 	if (arf->ti.z == 0) {
truelight@0: 		p += 6;
truelight@0: 	} else {
truelight@0: 		do {
truelight@0: 			// Make sure that a road can be built here.
truelight@0: 			if (AiBuildRoadHelper(tile, DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, p[0])) {
truelight@0: 				AiBuildRoadRecursive(arf, tile, p[1]);
truelight@0: 			}
truelight@0: 
truelight@0: 			// At the bottom depth?
truelight@0: 			if (arf->depth == 1) {
truelight@0: 				AiCheckRoadPathBetter(arf, p);
truelight@0: 			}
truelight@0: 
truelight@0: 			p += 2;
truelight@0: 		} while (!(p[0]&0x80));
truelight@0: 	}
truelight@0: 
truelight@0: 	AiCheckBuildRoadBridgeHere(arf, tile, p);
truelight@0: 	AiCheckBuildRoadTunnelHere(arf, tile, p+1);
truelight@0: 
truelight@0: 	arf->depth--;
truelight@0: }
truelight@0: 
truelight@0: int sw;
truelight@0: 
truelight@0: 
truelight@0: static void AiBuildRoadConstruct(Player *p)
truelight@0: {
truelight@0: 	AiRoadFinder arf;
truelight@0: 	int i;
truelight@0: 	uint tile;
truelight@0: 
truelight@0: 	// Reached destination?
truelight@0: 	if (AiCheckRoadFinished(p)) {
truelight@0: 		p->ai.state_mode = 255;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Setup recursive finder and call it.
truelight@0: 	arf.player = p;
truelight@0: 	arf.final_tile = p->ai.cur_tile_b;
truelight@0: 	arf.final_dir = p->ai.cur_dir_b;
truelight@0: 	arf.depth = 0;
truelight@0: 	arf.recursive_mode = 0;
truelight@0: 	arf.best_ptr = NULL;
truelight@0: 	arf.cur_best_dist = (uint)-1;
truelight@0: 	arf.cur_best_depth = 0xff;
truelight@0: 	arf.best_dist = (uint)-1;
truelight@0: 	arf.best_depth =  0xff;
truelight@0: 	arf.cur_best_tile = 0;
truelight@0: 	arf.best_tile = 0;
truelight@0: 	AiBuildRoadRecursive(&arf, p->ai.cur_tile_a, p->ai.cur_dir_a);		
truelight@0: 
truelight@0: 	// Reached destination?
truelight@0: 	if (arf.recursive_mode == 2 && arf.cur_best_depth == 0) {
truelight@0: 		p->ai.state_mode = 255;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Didn't find anything to build?
truelight@0: 	if (arf.best_ptr == NULL) {
truelight@0: 		// Terraform some
truelight@0: do_some_terraform:
truelight@0: 		for(i=0; i!=5; i++)
truelight@0: 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
truelight@0: 
truelight@0: 		if (++p->ai.state_counter == 21) {
truelight@0: 			p->ai.state_mode = 1;
truelight@0: 
truelight@0: 			p->ai.cur_tile_a = TILE_MASK(p->ai.cur_tile_a + _tileoffs_by_dir[p->ai.cur_dir_a]);
truelight@0: 			p->ai.cur_dir_a ^= 2;
truelight@0: 			p->ai.state_counter = 0;
truelight@0: 		}
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	tile = TILE_MASK(p->ai.cur_tile_a + _tileoffs_by_dir[p->ai.cur_dir_a]);
truelight@0: 
truelight@0: 	if (arf.best_ptr[0]&0x80) {
truelight@0: 		int i;
truelight@0: 		int32 bridge_len;
truelight@0: 		p->ai.cur_tile_a = arf.bridge_end_tile;
truelight@0: 		bridge_len = GetBridgeLength(tile, p->ai.cur_tile_a); // tile
truelight@0: 
truelight@0: 		/*	Figure out what (road)bridge type to build
truelight@0: 				start with best bridge, then go down to worse and worse bridges
truelight@0: 				unnecessary to check for worse bridge (i=0), since AI will always build that.
truelight@0: 				AI is so fucked up that fixing this small thing will probably not solve a thing
truelight@0: 		*/
truelight@0: 		for(i = 10; i != 0; i--) {                      
truelight@0: 			if (CheckBridge_Stuff(i, bridge_len)) {
truelight@0: 				int32 cost = DoCommandByTile(tile, p->ai.cur_tile_a, i + (0x80 << 8), DC_AUTO, CMD_BUILD_BRIDGE);
truelight@0: 				if (cost != CMD_ERROR && cost < (p->player_money >> 5))
truelight@0: 					break;
truelight@0: 			}
truelight@0: 		}
truelight@0: 
truelight@0: 		// Build it
truelight@0: 		DoCommandByTile(tile, p->ai.cur_tile_a, i + (0x80 << 8), DC_AUTO | DC_EXEC, CMD_BUILD_BRIDGE);
truelight@0: 
truelight@0: 		p->ai.state_counter = 0;
truelight@0: 	} else if (arf.best_ptr[0]&0x40) {
truelight@0: 		// tunnel
truelight@0: 		DoCommandByTile(tile, 0x200, 0, DC_AUTO | DC_EXEC, CMD_BUILD_TUNNEL);
truelight@0: 		p->ai.cur_tile_a = _build_tunnel_endtile;
truelight@0: 		p->ai.state_counter = 0;
truelight@0: 	} else {
truelight@0: 		
truelight@0: 		// road
truelight@0: 		if (!AiBuildRoadHelper(tile, DC_EXEC | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, arf.best_ptr[0]))
truelight@0: 			goto do_some_terraform;
truelight@0: 
truelight@0: 		p->ai.cur_dir_a = arf.best_ptr[1];
truelight@0: 		p->ai.cur_tile_a = tile;
truelight@0: 		p->ai.state_counter = 0;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (arf.best_tile != 0) {
truelight@0: 		for(i=0; i!=2; i++)
truelight@0: 			AiDoTerraformLand(arf.best_tile, arf.best_dir, 3, 0);
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static void AiBuildRoad(Player *p)
truelight@0: {
truelight@0: 	int i;
truelight@0: 
truelight@0: 	if (p->ai.state_mode < 1) {
truelight@0: 		// Construct mode, build new road.
truelight@0: 		AiBuildRoadConstruct(p);		
truelight@0: 	} else if (p->ai.state_mode == 1) {
truelight@0: 		// Destruct mode, not implemented for roads.
truelight@0: 		p->ai.state_mode = 2;
truelight@0: 		p->ai.state_counter = 0;
truelight@0: 	} else if (p->ai.state_mode == 2) {
truelight@0: 
truelight@0: 		// Terraform some and then try building again.
truelight@0: 		for(i=0; i!=4; i++)
truelight@0: 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
truelight@0: 
truelight@0: 		if (++p->ai.state_counter == 4) {
truelight@0: 			p->ai.state_counter = 0;
truelight@0: 			p->ai.state_mode = 0;
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static TileIndex AiGetRoadBlockEdge(byte rule, TileIndex tile, int *dir)
truelight@0: {
truelight@0: 	const AiDefaultBlockData *p = _road_default_block_data[rule]->data;
truelight@0: 	while (p->mode != 1) p++;
truelight@0: 	*dir = p->attr;
truelight@0: 	return TILE_ADD(tile, p->tileoffs);
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static void AiStateBuildRoad(Player *p)
truelight@0: {
truelight@0: 	int num;
truelight@0: 	AiBuildRec *aib;
truelight@0: 	byte cmd;
truelight@0: 	TileIndex tile;
truelight@0: 	int dir;
truelight@0: 
truelight@0: 	// time out?
truelight@0: 	if (++p->ai.timeout_counter == 1388) {
truelight@0: 		p->ai.state = AIS_DELETE_ROAD_BLOCKS;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Currently building a road between two points?
truelight@0: 	if (p->ai.state_mode != 255) {
truelight@0: 		AiBuildRoad(p);
truelight@0: 		
truelight@0: 		// Alternate between edges
truelight@0: 		swap_tile(&p->ai.start_tile_a, &p->ai.start_tile_b);
truelight@0: 		swap_tile(&p->ai.cur_tile_a, &p->ai.cur_tile_b);
truelight@0: 		swap_byte(&p->ai.start_dir_a, &p->ai.start_dir_b);
truelight@0: 		swap_byte(&p->ai.cur_dir_a, &p->ai.cur_dir_b);
truelight@0: 
truelight@0: 		sw ^= 1;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Now, find two new points to build between
truelight@0: 	num = p->ai.num_build_rec;
truelight@0: 	aib = &p->ai.src;
truelight@0: 
truelight@0: 	for(;;) {
truelight@0: 		cmd = aib->buildcmd_a;
truelight@0: 		aib->buildcmd_a = 255;
truelight@0: 		if (cmd != 255) break;
truelight@0: 
truelight@0: 		aib++;
truelight@0: 		if (--num == 0) {
truelight@0: 			p->ai.state = AIS_BUILD_ROAD_VEHICLES;
truelight@0: 			return;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	// Find first edge to build from.
truelight@0: 	tile = AiGetRoadBlockEdge(aib->cur_building_rule, aib->use_tile, &dir);
truelight@0: 	p->ai.start_tile_a = tile;
truelight@0: 	p->ai.cur_tile_a = tile;
truelight@0: 	p->ai.start_dir_a = dir;
truelight@0: 	p->ai.cur_dir_a = dir;
truelight@0: 
truelight@0: 	// Find second edge to build to
truelight@0: 	aib = (&p->ai.src) + (cmd&0xF);
truelight@0: 	tile = AiGetRoadBlockEdge(aib->cur_building_rule, aib->use_tile, &dir);
truelight@0: 	p->ai.start_tile_b = tile;
truelight@0: 	p->ai.cur_tile_b = tile;
truelight@0: 	p->ai.start_dir_b = dir;
truelight@0: 	p->ai.cur_dir_b = dir;
truelight@0: 
truelight@0: 	// And setup state.
truelight@0: 	p->ai.state_mode = 2;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: 	p->ai.banned_tile_count = 0;
truelight@0: }
truelight@0: 
truelight@0: static int AiGetStationIdFromRoadBlock(TileIndex tile, int id)
truelight@0: {
truelight@0: 	const AiDefaultBlockData *p = _road_default_block_data[id]->data;
truelight@0: 	while (p->mode != 1) p++;
truelight@0: 	return _map2[TILE_ADD(tile, p->tileoffs)];
truelight@0: }
truelight@0: 
truelight@0: static void AiStateBuildRoadVehicles(Player *p)
truelight@0: {
truelight@0: 	const AiDefaultBlockData *ptr;
truelight@0: 	uint tile,loco_id;
truelight@0: 	int veh, i;
truelight@0: 	int32 cost;
truelight@0: 	
truelight@0: 	ptr = _road_default_block_data[p->ai.src.cur_building_rule]->data;
truelight@0: 	for(;ptr->mode != 0;ptr++) {}
truelight@0: 	tile = TILE_ADD(p->ai.src.use_tile, ptr->tileoffs);
truelight@0: 
truelight@0: 	veh = AiChooseRoadVehToBuild(p->ai.cargo_type, p->player_money);
truelight@0: 	if (veh == -1) {
truelight@0: 		p->ai.state = AIS_0;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	cost = DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_ROAD_VEH);
truelight@0: 	if (cost == CMD_ERROR)
truelight@0: 		return;
truelight@0: 
truelight@0: 	loco_id = _new_roadveh_id;
truelight@0: 
truelight@0: 	for(i=0; p->ai.order_list_blocks[i] != 0xFF; i++) {
truelight@0: 		AiBuildRec *aib = (&p->ai.src) + p->ai.order_list_blocks[i];
truelight@0: 		uint flags  = (AiGetStationIdFromRoadBlock(aib->use_tile, aib->cur_building_rule) << 8) + OT_GOTO_STATION;
truelight@0: 		bool is_pass = (p->ai.cargo_type == CT_PASSENGERS ||
truelight@0: 							p->ai.cargo_type == CT_MAIL ||
truelight@0: 							(_opt.landscape==LT_NORMAL && p->ai.cargo_type == CT_VALUABLES));
truelight@0: 
truelight@0: 		if (!is_pass && i == 1) flags |= OF_UNLOAD;
truelight@0: 		if (p->ai.num_want_fullload != 0 && (is_pass || i == 0)) flags |= OF_FULL_LOAD;
truelight@0: 
truelight@0: 		DoCommandByTile(0, loco_id + (i << 16),	flags, DC_EXEC, CMD_INSERT_ORDER);
truelight@0: 	}
truelight@0: 
truelight@0: 	DoCommandByTile(0, loco_id, 0, DC_EXEC, CMD_START_STOP_ROADVEH);
truelight@0: 
truelight@0: 	if (p->ai.num_want_fullload != 0)
truelight@0: 		p->ai.num_want_fullload--;
truelight@0: 
truelight@0: 	if (--p->ai.num_loco_to_build == 0) {
truelight@0: 		p->ai.state =	AIS_0;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiStateDeleteRoadBlocks(Player *p)
truelight@0: {
truelight@0: 	int num;
truelight@0: 	AiBuildRec *aib;
truelight@0: 	const AiDefaultBlockData *b;
truelight@0: 
truelight@0: 	num = p->ai.num_build_rec;	
truelight@0: 	aib = &p->ai.src;
truelight@0: 	do {
truelight@0: 		if (aib->cur_building_rule != 255) {
truelight@0: 			b = _road_default_block_data[aib->cur_building_rule]->data;
truelight@0: 			while (b->mode != 4) {
truelight@0: 				if (b->mode <= 1) {
truelight@0: 					DoCommandByTile(TILE_ADD(aib->use_tile, b->tileoffs), 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@0: 				}
truelight@0: 				b++;
truelight@0: 			}
truelight@0: 		}
truelight@0: 	} while (++aib,--num);
truelight@0: 
truelight@0: 	p->ai.state = AIS_0;
truelight@0: }
truelight@0: 
truelight@0: static bool AiCheckIfHangar(Station *st)
truelight@0: {
truelight@0: 	uint tile = st->airport_tile;
truelight@0: 	// HANGAR of airports
truelight@0: 	// 0x20 - hangar large airport (32)
truelight@0: 	// 0x41 - hangar small airport (65)
truelight@0: 	return (_map5[tile] == 32 || _map5[tile] == 65);
truelight@0: }
truelight@0: 
truelight@0: static void AiStateAirportStuff(Player *p)
truelight@0: {
truelight@0: 	Station *st;
truelight@0: 	byte acc_planes;
truelight@0: 	int i;
truelight@0: 	AiBuildRec *aib;
truelight@0: 	byte rule;
truelight@0: 
truelight@0: 	// Here we look for an airport we could use instead of building a new
truelight@0: 	// one. If we find such an aiport for any waypoint,
truelight@0: 	// AiStateBuildDefaultAirportBlocks() will kindly skip that one when
truelight@0: 	// building the waypoints.
truelight@0: 
truelight@0: 	i = 0;
truelight@0: 	do {
truelight@0: 		// We do this all twice - once for the source (town in the case
truelight@0: 		// of oilrig route) and then for the destination (oilrig in the
truelight@0: 		// case of oilrig route).
truelight@0: 		aib = &p->ai.src + i;
truelight@0: 
truelight@0: 		FOR_ALL_STATIONS(st) {
truelight@0: 			// Dismiss ghost stations.
truelight@0: 			if (st->xy == 0)
truelight@0: 				continue;
truelight@0: 
truelight@0: 			// Is this an airport?
truelight@0: 			if (!(st->facilities & FACIL_AIRPORT))
truelight@0: 				continue;
truelight@0: 
truelight@0: 			// Do we own the airport? (Oilrigs aren't owned, though.)
truelight@0: 			if (st->owner != OWNER_NONE && st->owner != _current_player)
truelight@0: 				continue;
truelight@0: 
truelight@0: 			acc_planes = GetAirport(st->airport_type)->acc_planes;
truelight@0: 
truelight@0: 			// Dismiss heliports, unless we are checking an oilrig.
truelight@0: 			if (acc_planes == HELICOPTERS_ONLY && !(p->ai.build_kind == 1 && i == 1))
truelight@0: 				continue;
truelight@0: 
truelight@0: 			// Dismiss country airports if we are doing the other
truelight@0: 			// endpoint of an oilrig route.
truelight@0: 			if (acc_planes == AIRCRAFT_ONLY && (p->ai.build_kind == 1 && i == 0))
truelight@0: 				continue;
truelight@0: 
truelight@0: 			// Dismiss airports too far away.
truelight@0: 			if (GetTileDist1D(st->airport_tile, aib->spec_tile) > aib->rand_rng)
truelight@0: 				continue;
truelight@0: 
truelight@0: 			// It's ideal airport, let's take it!
truelight@0: 
truelight@0: 			/* XXX: This part is utterly broken - rule should
truelight@0: 			 * contain number of the rule appropriate for the
truelight@0: 			 * airport type (country, town, ...), see
truelight@0: 			 * _airport_default_block_data (rule is just an index
truelight@0: 			 * in this array). But the only difference between the
truelight@0: 			 * currently existing two rules (rule 0 - town and rule
truelight@0: 			 * 1 - country) is the attr field which is used only
truelight@0: 			 * when building new airports - and that's irrelevant
truelight@0: 			 * for us. So using just about any rule will suffice
truelight@0: 			 * here for now (some of the new airport types would be
truelight@0: 			 * broken because they will probably need different
truelight@0: 			 * tileoff values etc), no matter that
truelight@0: 			 * AiCheckIfHangar() makes no sense. --pasky */
truelight@0: 			if (acc_planes == HELICOPTERS_ONLY) {
truelight@0: 				/* Heliports should have maybe own rulesets but
truelight@0: 				 * OTOH we don't want AI to pick them up when
truelight@0: 				 * looking for a suitable airport type to build.
truelight@0: 				 * So any of rules 0 or 1 would do for now. The
truelight@0: 				 * original rule number was 2 but that's a bug
truelight@0: 				 * because we have no such rule. */
truelight@0: 				rule = 1;
truelight@0: 			} else {
truelight@0: 				rule = AiCheckIfHangar(st);
truelight@0: 			}
truelight@0: 
truelight@0: 			aib->cur_building_rule = rule;
truelight@0: 			aib->use_tile = st->airport_tile;
truelight@0: 			break;
truelight@0: 		}
truelight@0: 	} while (++i != p->ai.num_build_rec);
truelight@0: 
truelight@0: 	p->ai.state = AIS_BUILD_DEFAULT_AIRPORT_BLOCKS;
truelight@0: 	p->ai.state_mode = 255;
truelight@0: 	p->ai.state_counter = 0;
truelight@0: }
truelight@0: 
truelight@0: static int32 AiDoBuildDefaultAirportBlock(TileIndex tile, const AiDefaultBlockData *p, byte flag)
truelight@0: {
truelight@0: 	int32 total_cost = 0, r;
truelight@0: 
truelight@0: 	for(;p->mode == 0;p++) {
truelight@0: 		if (!HASBIT(_avail_aircraft, p->attr))
truelight@0: 			return CMD_ERROR;
truelight@0: 		r = DoCommandByTile(TILE_MASK(tile + p->tileoffs), p->attr,0,flag | DC_AUTO | DC_NO_WATER,CMD_BUILD_AIRPORT);
truelight@0: 		if (r == CMD_ERROR)
truelight@0: 			return CMD_ERROR;
truelight@0: 		total_cost += r;
truelight@0: 	}
truelight@0: 
truelight@0: 	return total_cost;
truelight@0: }
truelight@0: 
truelight@0: static bool AiCheckAirportResources(TileIndex tile, const AiDefaultBlockData *p, byte cargo)
truelight@0: {
truelight@0: 	uint values[NUM_CARGO];
truelight@0: 	int w,h;
truelight@0: 	uint tile2;
truelight@0: 
truelight@0: 	for(;p->mode==0;p++) {
truelight@0: 		tile2 = TILE_ADD(tile, p->tileoffs);
truelight@0: 		w = _airport_size_x[p->attr];
truelight@0: 		h = _airport_size_y[p->attr];
truelight@0: 		if (cargo & 0x80) {
truelight@0: 			GetProductionAroundTiles(values, tile2, w, h);
truelight@0: 			return values[cargo & 0x7F] != 0;
truelight@0: 		} else {
truelight@0: 			GetAcceptanceAroundTiles(values, tile2, w, h);
truelight@0: 			return values[cargo] >= 8;
truelight@0: 		}
truelight@0: 	}
truelight@0: 	return true;
truelight@0: }
truelight@0: 
truelight@0: static int AiFindBestDefaultAirportBlock(TileIndex tile, byte cargo, byte heli, int32 *cost)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	const AiDefaultBlockData *p;
truelight@0: 	for(i=0; (p = _airport_default_block_data[i]) != NULL; i++) {
truelight@0: 		// If we are doing a helicopter service, avoid building
truelight@0: 		// airports where they can't land.
truelight@0: 		if (heli && GetAirport(p->attr)->acc_planes == AIRCRAFT_ONLY)
truelight@0: 			continue;
truelight@0: 
truelight@0: 		*cost = AiDoBuildDefaultAirportBlock(tile, p, 0);
truelight@0: 		if (*cost != CMD_ERROR && AiCheckAirportResources(tile, p, cargo))
truelight@0: 			return i;
truelight@0: 	}
truelight@0: 	return -1;
truelight@0: }
truelight@0: 
truelight@0: static void AiStateBuildDefaultAirportBlocks(Player *p)
truelight@0: {
truelight@0: 	int i, j;
truelight@0: 	AiBuildRec *aib;
truelight@0: 	int rule;
truelight@0: 	int32 cost;
truelight@0: 
truelight@0: 	// time out?
truelight@0: 	if (++p->ai.timeout_counter == 1388) {
truelight@0: 		p->ai.state = AIS_0;
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// do the following 8 times
truelight@0: 	i = 8;
truelight@0: 	do {
truelight@0: 		// check if we can build the default 
truelight@0: 		aib = &p->ai.src;
truelight@0: 		j = p->ai.num_build_rec;
truelight@0: 		do {
truelight@0: 			// this item has already been built?
truelight@0: 			if (aib->cur_building_rule != 255)
truelight@0: 				continue;
truelight@0: 
truelight@0: 			// adjust the coordinate randomly,
truelight@0: 			// to make sure that we find a position.
truelight@0: 			aib->use_tile = AdjustTileCoordRandomly(aib->spec_tile, aib->rand_rng);
truelight@0: 
truelight@0: 			// check if the aircraft stuff can be built there.
truelight@0: 			rule = AiFindBestDefaultAirportBlock(aib->use_tile, aib->cargo, p->ai.build_kind, &cost);
truelight@0: 
truelight@0: #if 0
truelight@0: 			if (!IS_TILETYPE(aib->use_tile, MP_STREET) &&
truelight@0: 					!IS_TILETYPE(aib->use_tile, MP_RAILWAY) &&
truelight@0: 					!IS_TILETYPE(aib->use_tile, MP_STATION)
truelight@0: 					) {
truelight@0: 				
truelight@0: 				_map_type_and_height[aib->use_tile] = 0xa1;
truelight@0: 				_map5[aib->use_tile] = 0x80;
truelight@0: 				MarkTileDirtyByTile(aib->use_tile);
truelight@0: 			}
truelight@0: #endif
truelight@0: //			redsq_debug(aib->use_tile);
truelight@0: 
truelight@0: 			if (rule == -1) {
truelight@0: 				// cannot build, terraform after a while
truelight@0: 				if (p->ai.state_counter >= 600) {
truelight@0: 					AiDoTerraformLand(aib->use_tile, Random()&3, 3, (int8)p->ai.state_mode);
truelight@0: 				}
truelight@0: 				// also try the other terraform direction
truelight@0: 				if (++p->ai.state_counter >= 1000) {
truelight@0: 					p->ai.state_counter = 0;
truelight@0: 					p->ai.state_mode = -p->ai.state_mode;
truelight@0: 				}
truelight@0: 			} else if (CheckPlayerHasMoney(cost) && AiCheckBlockDistances(p,aib->use_tile)) {
truelight@0: 				// player has money, build it.
truelight@0: 				int32 r;
truelight@0: 
truelight@0: 				aib->cur_building_rule = rule;
truelight@0: 
truelight@0: 				r = AiDoBuildDefaultAirportBlock(
truelight@0: 					aib->use_tile,
truelight@0: 					_airport_default_block_data[rule],
truelight@0: 					DC_EXEC | DC_NO_TOWN_RATING
truelight@0: 				);
truelight@0: 				assert(r != CMD_ERROR);
truelight@0: 			}
truelight@0: 		} while (++aib,--j);
truelight@0: 	} while (--i);
truelight@0: 
truelight@0: 	// check if we're done with all of them
truelight@0: 	aib = &p->ai.src;
truelight@0: 	j = p->ai.num_build_rec;
truelight@0: 	do {
truelight@0: 		if (aib->cur_building_rule == 255)
truelight@0: 			return;
truelight@0: 	} while (++aib,--j);
truelight@0: 
truelight@0: 	// yep, all are done. switch state.
truelight@0: 	p->ai.state = AIS_BUILD_AIRCRAFT_VEHICLES;
truelight@0: }
truelight@0: 
truelight@0: static int AiGetStationIdFromAircraftBlock(TileIndex tile, int id)
truelight@0: {
truelight@0: 	const AiDefaultBlockData *p = _airport_default_block_data[id];
truelight@0: 	while (p->mode != 1) p++;
truelight@0: 	return _map2[TILE_ADD(tile, p->tileoffs)];
truelight@0: }
truelight@0: 
truelight@0: static void AiStateBuildAircraftVehicles(Player *p)
truelight@0: {
truelight@0: 	const AiDefaultBlockData *ptr;
truelight@0: 	uint tile;
truelight@0: 	int veh;
truelight@0: 	int32 cost;
truelight@0: 	int i;
truelight@0: 	uint loco_id;
truelight@0: 	
truelight@0: 	ptr = _airport_default_block_data[p->ai.src.cur_building_rule];
truelight@0: 	for(;ptr->mode!=0;ptr++) {}
truelight@0: 
truelight@0: 	tile = TILE_ADD(p->ai.src.use_tile, ptr->tileoffs);
truelight@0: 
truelight@0: 	veh = AiChooseAircraftToBuild(p->player_money, p->ai.build_kind!=0 ? 1 : 0);
truelight@0: 	if (veh == -1) {
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	cost = DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_AIRCRAFT);
truelight@0: 	if (cost == CMD_ERROR)
truelight@0: 		return;
truelight@0: 	loco_id = _new_aircraft_id;
truelight@0: 
truelight@0: 	for(i=0; p->ai.order_list_blocks[i] != 0xFF; i++) {
truelight@0: 		AiBuildRec *aib = (&p->ai.src) + p->ai.order_list_blocks[i];
truelight@0: 		uint flags = (AiGetStationIdFromAircraftBlock(aib->use_tile, aib->cur_building_rule) << 8) + OT_GOTO_STATION;
truelight@0: 		bool is_pass = (p->ai.cargo_type == CT_PASSENGERS || p->ai.cargo_type == CT_MAIL);
truelight@0: 
truelight@0: 		if (!is_pass && i == 1) flags |= OF_UNLOAD;
truelight@0: 		if (p->ai.num_want_fullload != 0 && (is_pass || i == 0)) flags |= OF_FULL_LOAD;
truelight@0: 
truelight@0: 		DoCommandByTile(0, loco_id + (i << 16), flags, DC_EXEC, CMD_INSERT_ORDER);
truelight@0: 	}
truelight@0: 
truelight@0: 	DoCommandByTile(0, loco_id, 0, DC_EXEC, CMD_START_STOP_AIRCRAFT);
truelight@0: 
truelight@0: 	if (p->ai.num_want_fullload != 0)
truelight@0: 		p->ai.num_want_fullload--;
truelight@0: 
truelight@0: 	if (--p->ai.num_loco_to_build == 0) {
truelight@0: 		p->ai.state =	AIS_0;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiStateCheckShipStuff(Player *p)
truelight@0: {
truelight@0: 	// XXX
truelight@0: 	error("!AiStateCheckShipStuff");
truelight@0: }
truelight@0: 
truelight@0: static void AiStateBuildDefaultShipBlocks(Player *p)
truelight@0: {
truelight@0: 	// XXX
truelight@0: 	error("!AiStateBuildDefaultShipBlocks");
truelight@0: }
truelight@0: 
truelight@0: static void AiStateDoShipStuff(Player *p)
truelight@0: {
truelight@0: 	// XXX
truelight@0: 	error("!AiStateDoShipStuff");
truelight@0: }
truelight@0: 
truelight@0: static void AiStateSellVeh(Player *p)
truelight@0: {
truelight@0: 	Vehicle *v = p->ai.cur_veh;
truelight@0: 
truelight@0: 	if (v->owner == _current_player) {
truelight@0: 		if (v->type == VEH_Train) {
truelight@0: 			
truelight@0: 			if (!IsTrainDepotTile(v->tile) || v->u.rail.track != 0x80 || !(v->vehstatus&VS_STOPPED)) {
truelight@0: 				if ((v->next_order & OT_MASK) != OT_GOTO_DEPOT)
truelight@0: 					DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_TRAIN_GOTO_DEPOT);
truelight@0: 				goto going_to_depot;
truelight@0: 			}
truelight@0: 
truelight@0: 			// Sell whole train
truelight@0: 			DoCommandByTile(v->tile, v->index, 1, DC_EXEC, CMD_SELL_RAIL_WAGON);
truelight@0: 			
truelight@0: 		} else if (v->type == VEH_Road) {
truelight@0: 			if (!IsRoadDepotTile(v->tile) || v->u.road.state != 254 || !(v->vehstatus&VS_STOPPED)) {
truelight@0: 				if ((v->next_order & OT_MASK) != OT_GOTO_DEPOT)
truelight@0: 					DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_SEND_ROADVEH_TO_DEPOT);
truelight@0: 				goto going_to_depot;
truelight@0: 			}
truelight@0: 
truelight@0: 			DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_SELL_ROAD_VEH);
truelight@0: 		} else if (v->type == VEH_Aircraft) {
truelight@0: 			if (!IsAircraftHangarTile(v->tile) && !(v->vehstatus&VS_STOPPED)) {
truelight@0: 				if ((v->next_order & OT_MASK) != OT_GOTO_DEPOT)
truelight@0: 					DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_SEND_AIRCRAFT_TO_HANGAR);
truelight@0: 				goto going_to_depot;
truelight@0: 			}
truelight@0: 
truelight@0: 			DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_SELL_AIRCRAFT);
truelight@0: 			} else if (v->type == VEH_Ship) {
truelight@0: 			// XXX: not implemented
truelight@0: 			error("!v->type == VEH_Ship");
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	goto return_to_loop;
truelight@0: going_to_depot:;
truelight@0: 	if (++p->ai.state_counter <= 832)
truelight@0: 		return;
truelight@0: 
truelight@0: 	if ((v->next_order&OT_MASK) == OT_GOTO_DEPOT) {
truelight@0: 		v->next_order = OT_DUMMY;
truelight@0: 		InvalidateWindow(WC_VEHICLE_VIEW, v->index);
truelight@0: 	}
truelight@0: return_to_loop:;
truelight@0: 	p->ai.state = AIS_VEH_LOOP;
truelight@0: }
truelight@0: 
truelight@0: static void AiStateRemoveStation(Player *p)
truelight@0: {
truelight@0: 	// Remove stations that aren't in use by any vehicle
truelight@0: 	byte in_use[256], *used;
truelight@0: 	uint16 *ord;
truelight@0: 	Station *st;
truelight@0: 	uint tile;
truelight@0: 
truelight@0: 	// Go to this state when we're done.
truelight@0: 	p->ai.state = AIS_1;
truelight@0: 
truelight@0: 	// Get a list of all stations that are in use by a vehicle
truelight@0: 	memset(in_use, 0, sizeof(in_use));
truelight@0: 	for(ord=_order_array; ord != _ptr_to_next_order; ord++) {
truelight@0: 		if ((*ord & OT_MASK) == OT_GOTO_STATION)
truelight@0: 			in_use[*ord >> 8] = 1;
truelight@0: 	}
truelight@0: 
truelight@0: 	// Go through all stations and delete those that aren't in use
truelight@0: 	used=in_use;
truelight@0: 	FOR_ALL_STATIONS(st) {
truelight@0: 		if (st->xy != 0 && st->owner == _current_player && !*used &&
truelight@0: 				((tile = st->bus_tile) != 0 ||
truelight@0: 					(tile = st->lorry_tile) != 0 ||
truelight@0: 					(tile = st->train_tile) != 0 ||
truelight@0: 					(tile = st->dock_tile) != 0 ||
truelight@0: 					(tile = st->airport_tile) != 0)) {
truelight@0: 			DoCommandByTile(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@0: 		}
truelight@0: 		used++;
truelight@0: 	}
truelight@0: 
truelight@0: }
truelight@0: 
truelight@0: static void AiRemovePlayerRailOrRoad(Player *p, uint tile)
truelight@0: {
truelight@0: 	byte m5;
truelight@0: 
truelight@0: 	if (IS_TILETYPE(tile, MP_RAILWAY)) {
truelight@0: 		if (_map_owner[tile] != _current_player)
truelight@0: 			return;
truelight@0: 		m5 = _map5[tile];
truelight@0: 		if ((m5&~0x3) != 0xC0) {
truelight@0: is_rail_crossing:;
truelight@0: 			m5 = GetRailTrackStatus(tile);
truelight@0: 			
truelight@0: 			if (m5 == 0xC || m5 == 0x30)
truelight@0: 				return;
truelight@0: 
truelight@0: 			if (m5&0x25) {
truelight@0: pos_0:
truelight@0: 				if (!(GetRailTrackStatus(TILE_MASK(tile-TILE_XY(1,0)))&0x19)) {
truelight@0: 					p->ai.cur_dir_a = 0;
truelight@0: 					p->ai.cur_tile_a = tile;
truelight@0: 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
truelight@0: 					return;
truelight@0: 				}
truelight@0: 			}
truelight@0: 
truelight@0: 			if (m5&0x2A) {
truelight@0: pos_1:
truelight@0: 				if (!(GetRailTrackStatus(TILE_MASK(tile+TILE_XY(0,1)))&0x16)) {
truelight@0: 					p->ai.cur_dir_a = 1;
truelight@0: 					p->ai.cur_tile_a = tile;
truelight@0: 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
truelight@0: 					return;
truelight@0: 				}
truelight@0: 			}
truelight@0: 
truelight@0: 			if (m5&0x19) {
truelight@0: pos_2:
truelight@0: 				if (!(GetRailTrackStatus(TILE_MASK(tile+TILE_XY(1,0)))&0x25)) {
truelight@0: 					p->ai.cur_dir_a = 2;
truelight@0: 					p->ai.cur_tile_a = tile;
truelight@0: 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
truelight@0: 					return;
truelight@0: 				}
truelight@0: 			}
truelight@0: 
truelight@0: 			if (m5&0x16) {
truelight@0: pos_3:
truelight@0: 				if (!(GetRailTrackStatus(TILE_MASK(tile-TILE_XY(0,1)))&0x2A)) {
truelight@0: 					p->ai.cur_dir_a = 3;
truelight@0: 					p->ai.cur_tile_a = tile;
truelight@0: 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
truelight@0: 					return;
truelight@0: 				}
truelight@0: 			}
truelight@0: 		} else {
truelight@0: 			static const byte _depot_bits[] = {0x19,0x16,0x25,0x2A};
truelight@0: 
truelight@0: 			m5 &= 3;
truelight@0: 			if (GetRailTrackStatus(tile + _tileoffs_by_dir[m5]) & _depot_bits[m5])
truelight@0: 				return;
truelight@0: 			
truelight@0: 			DoCommandByTile(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@0: 		}
truelight@0: 	} else if (IS_TILETYPE(tile, MP_STREET)) {
truelight@0: 		if (_map_owner[tile] != _current_player)
truelight@0: 			return;
truelight@0: 
truelight@0: 		if ( (_map5[tile]&0xF0) == 0x10)
truelight@0: 			goto is_rail_crossing;
truelight@0: 
truelight@0: 		if ( (_map5[tile]&0xF0) == 0x20) {
truelight@0: 			int dir;
truelight@0: 
truelight@0: 			// Check if there are any stations around.
truelight@0: 			if (IS_TILETYPE(tile + TILE_XY(-1,0), MP_STATION) &&
truelight@0: 					_map_owner[tile + TILE_XY(-1,0)] == _current_player)
truelight@0: 						return;
truelight@0: 
truelight@0: 			if (IS_TILETYPE(tile + TILE_XY(1,0), MP_STATION) &&
truelight@0: 					_map_owner[tile + TILE_XY(1,0)] == _current_player)
truelight@0: 						return;
truelight@0: 
truelight@0: 			if (IS_TILETYPE(tile + TILE_XY(0,-1), MP_STATION) &&
truelight@0: 					_map_owner[tile + TILE_XY(0,-1)] == _current_player)
truelight@0: 						return;
truelight@0: 
truelight@0: 			if (IS_TILETYPE(tile + TILE_XY(0,1), MP_STATION) &&
truelight@0: 					_map_owner[tile + TILE_XY(0,1)] == _current_player)
truelight@0: 						return;
truelight@0: 
truelight@0: 			dir = _map5[tile] & 3;
truelight@0: 
truelight@0: 			DoCommandByTile(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
truelight@0: 			DoCommandByTile(
truelight@0: 				TILE_MASK(tile + _tileoffs_by_dir[dir]),
truelight@0: 				8 >> (dir ^ 2),
truelight@0: 				0,
truelight@0: 				DC_EXEC,
truelight@0: 				CMD_REMOVE_ROAD);
truelight@0: 		}
truelight@0: 	} else if (IS_TILETYPE(tile, MP_TUNNELBRIDGE)) {
truelight@0: 		byte b;
truelight@0: 
truelight@0: 		if (_map_owner[tile] != _current_player || (_map5[tile] & 0xC6) != 0x80)
truelight@0: 			return;
truelight@0: 		
truelight@0: 		m5 = 0;
truelight@0: 
truelight@0: 		b = _map5[tile] & 0x21;
truelight@0: 		if (b == 0) goto pos_0;
truelight@0: 		if (b == 1) goto pos_3;
truelight@0: 		if (b == 0x20) goto pos_2;
truelight@0: 		goto pos_1;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiStateRemoveTrack(Player *p)
truelight@0: {
truelight@0: 	int num = 1000;
truelight@0: 	
truelight@0: 	do {
truelight@0: 		uint tile = ++p->ai.state_counter;
truelight@0: 
truelight@0: 		// Iterated all tiles?
truelight@0: 		if (tile == 0) {
truelight@0: 			p->ai.state = AIS_REMOVE_STATION;
truelight@0: 			return;
truelight@0: 		}
truelight@0: 
truelight@0: 		// Remove player stuff in that tile
truelight@0: 		AiRemovePlayerRailOrRoad(p, tile);
truelight@0: 		if (p->ai.state != AIS_REMOVE_TRACK)
truelight@0: 			return;
truelight@0: 	} while (--num);
truelight@0: }
truelight@0: 
truelight@0: static void AiStateRemoveSingleRailTile(Player *p)
truelight@0: {
truelight@0: 	// Remove until we can't remove more.
truelight@0: 	if (!AiRemoveTileAndGoForward(p)) {
truelight@0: 		p->ai.state = AIS_REMOVE_TRACK;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static AiStateAction * const _ai_actions[] = {
truelight@0: 	AiCase0,
truelight@0: 	AiCase1,
truelight@0: 	AiStateVehLoop,
truelight@0: 	AiStateCheckReplaceVehicle,
truelight@0: 	AiStateDoReplaceVehicle,
truelight@0: 	AiStateWantNewRoute,
truelight@0: 
truelight@0: 	AiStateBuildDefaultRailBlocks,
truelight@0: 	AiStateBuildRail,
truelight@0: 	AiStateBuildRailVeh,
truelight@0: 	AiStateDeleteRailBlocks,
truelight@0: 
truelight@0: 	AiStateBuildDefaultRoadBlocks,
truelight@0: 	AiStateBuildRoad,
truelight@0: 	AiStateBuildRoadVehicles,
truelight@0: 	AiStateDeleteRoadBlocks,
truelight@0: 
truelight@0: 	AiStateAirportStuff,
truelight@0: 	AiStateBuildDefaultAirportBlocks,
truelight@0: 	AiStateBuildAircraftVehicles,
truelight@0: 
truelight@0: 	AiStateCheckShipStuff,
truelight@0: 	AiStateBuildDefaultShipBlocks,
truelight@0: 	AiStateDoShipStuff,
truelight@0: 
truelight@0: 	AiStateSellVeh,
truelight@0: 	AiStateRemoveStation,
truelight@0: 	AiStateRemoveTrack,
truelight@0: 	
truelight@0: 	AiStateRemoveSingleRailTile
truelight@0: };
truelight@0: 
truelight@0: extern void ShowBuyCompanyDialog(uint player);
truelight@0: 
truelight@0: static void AiHandleTakeover(Player *p)
truelight@0: {
truelight@0: 	if (p->bankrupt_timeout != 0) {
truelight@0: 		if ((p->bankrupt_timeout-=8) > 0)
truelight@0: 			return;
truelight@0: 		p->bankrupt_timeout = 0;
truelight@0: 		DeleteWindowById(WC_BUY_COMPANY, _current_player);
truelight@0: 		if (_current_player == _local_player) {
truelight@0: 			AskExitToGameMenu();
truelight@0: 			return;
truelight@0: 		}
truelight@0: 		if (IS_HUMAN_PLAYER(_current_player))
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (p->bankrupt_asked == 255)
truelight@0: 		return;
truelight@0: 
truelight@0: 	{
truelight@0: 		uint asked = p->bankrupt_asked;
truelight@0: 		Player *pp, *best_pl = NULL;
truelight@0: 		int32 best_val = -1;
truelight@0: 		uint old_p;
truelight@0: 
truelight@0: 		// Ask the guy with the highest performance hist.
truelight@0: 		FOR_ALL_PLAYERS(pp) {
truelight@0: 			if (pp->is_active &&
truelight@0: 					!(asked&1) &&
truelight@0: 					pp->bankrupt_asked == 0 &&
truelight@0: 					best_val < pp->old_economy[1].performance_history) {
truelight@0: 				best_val = pp->old_economy[1].performance_history;
truelight@0: 				best_pl = pp;
truelight@0: 			}
truelight@0: 			asked>>=1;
truelight@0: 		}
truelight@0: 
truelight@0: 		// Asked all players?
truelight@0: 		if (best_val == -1) {
truelight@0: 			p->bankrupt_asked = 255;
truelight@0: 			return;
truelight@0: 		}
truelight@0: 
truelight@0: 		SETBIT(p->bankrupt_asked, best_pl->index);
truelight@0: 
truelight@0: 		if (best_pl->index == _local_player) {
truelight@0: 			p->bankrupt_timeout = 4440;
truelight@0: 			ShowBuyCompanyDialog(_current_player);
truelight@0: 			return;
truelight@0: 		}
truelight@0: 		if (IS_HUMAN_PLAYER(best_pl->index))
truelight@0: 			return;
truelight@0: 
truelight@0: 		// Too little money for computer to buy it?
truelight@0: 		if (best_pl->player_money >> 1 >= p->bankrupt_value) {
truelight@0: 			// Computer wants to buy it.
truelight@0: 			old_p = _current_player;
truelight@0: 			_current_player = p->index;
truelight@0: 			DoCommandByTile(0, old_p, 0, DC_EXEC, CMD_BUY_COMPANY);
truelight@0: 			_current_player = old_p;
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiAdjustLoan(Player *p)
truelight@0: {
truelight@0: 	int32 base = AiGetBasePrice(p);
truelight@0: 
truelight@0: 	if (p->player_money > base * 1400) {
truelight@0: 		// Decrease loan
truelight@0: 		if (p->current_loan != 0) {
truelight@0: 			DoCommandByTile(0, _current_player, 0, DC_EXEC, CMD_DECREASE_LOAN);
truelight@0: 		}
truelight@0: 	} else if (p->player_money < base * 500) {
truelight@0: 		// Increase loan
truelight@0: 		if (p->current_loan < _economy.max_loan &&
truelight@0: 				p->num_valid_stat_ent >= 2 &&
truelight@0: 				-(p->old_economy[0].expenses+p->old_economy[1].expenses) < base * 60) {
truelight@0: 			DoCommandByTile(0, _current_player, 0, DC_EXEC, CMD_INCREASE_LOAN);
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void AiBuildCompanyHQ(Player *p)
truelight@0: {
truelight@0: 	TileIndex tile;
truelight@0: 
truelight@0: 	if (p->location_of_house == 0 &&
truelight@0: 			p->last_build_coordinate != 0) {
truelight@0: 		tile = AdjustTileCoordRandomly(p->last_build_coordinate, 8);
truelight@0: 		DoCommandByTile(tile, 0, 0, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_BUILD_COMPANY_HQ);
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: void AiDoGameLoop(Player *p) 
truelight@0: {
truelight@0: 	_cur_ai_player = p;
truelight@0: 	
truelight@0: 	if (p->bankrupt_asked != 0) {
truelight@0: 		AiHandleTakeover(p);
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (IS_HUMAN_PLAYER(_current_player))
truelight@0: 		return;
truelight@0: 
truelight@0: 	AiAdjustLoan(p);
truelight@0: 	AiBuildCompanyHQ(p);
truelight@0: 
truelight@0: 	if (_opt.diff.competitor_speed == 4) {
truelight@0: 		/* ultraspeed */
truelight@0: 		_ai_actions[p->ai.state](p);
truelight@0: 		if (p->bankrupt_asked != 0)
truelight@0: 			return;
truelight@0: 	} else if (_opt.diff.competitor_speed != 3) {
truelight@0: 		p->ai.tick++;
truelight@0: 		if (!(p->ai.tick&1))
truelight@0: 			return;
truelight@0: 		if (_opt.diff.competitor_speed != 2) {
truelight@0: 			if (!(p->ai.tick&2))
truelight@0: 				return;
truelight@0: 			if (_opt.diff.competitor_speed == 0) {
truelight@0: 				if (!(p->ai.tick&4))
truelight@0: 					return;
truelight@0: 			}
truelight@0: 		}
truelight@0: 	} 
truelight@0: #if 0
truelight@0: 	{
truelight@0: 		static byte old_state = 99;
truelight@0: 		static bool hasdots = false;
truelight@0: 		char *_ai_state_names[]={
truelight@0: 			"AiCase0",
truelight@0: 			"AiCase1",
truelight@0: 			"AiStateVehLoop",
truelight@0: 			"AiStateCheckReplaceVehicle",
truelight@0: 			"AiStateDoReplaceVehicle",
truelight@0: 			"AiStateWantNewRoute",
truelight@0: 			"AiStateBuildDefaultRailBlocks",
truelight@0: 			"AiStateBuildRail",
truelight@0: 			"AiStateBuildRailVeh",
truelight@0: 			"AiStateDeleteRailBlocks",
truelight@0: 			"AiStateBuildDefaultRoadBlocks",
truelight@0: 			"AiStateBuildRoad",
truelight@0: 			"AiStateBuildRoadVehicles",
truelight@0: 			"AiStateDeleteRoadBlocks",
truelight@0: 			"AiStateAirportStuff",
truelight@0: 			"AiStateBuildDefaultAirportBlocks",
truelight@0: 			"AiStateBuildAircraftVehicles",
truelight@0: 			"AiStateCheckShipStuff",
truelight@0: 			"AiStateBuildDefaultShipBlocks",
truelight@0: 			"AiStateDoShipStuff",
truelight@0: 			"AiStateSellVeh",
truelight@0: 			"AiStateRemoveStation",
truelight@0: 			"AiStateRemoveTrack",
truelight@0: 			"AiStateRemoveSingleRailTile"
truelight@0: 		};
truelight@0: 
truelight@0: 		if (p->ai.state != old_state) {
truelight@0: 			if (hasdots)
truelight@0: 				printf("\n");
truelight@0: 			hasdots=false;
truelight@0: 			printf("AiState: %s\n", _ai_state_names[old_state=p->ai.state]);
truelight@0: 		} else {
truelight@0: 			printf(".");
truelight@0: 			hasdots=true;
truelight@0: 		}
truelight@0: 	}
truelight@0: #endif
truelight@0: 
truelight@0: 	_ai_actions[p->ai.state](p);
truelight@0: }