truelight@0: #include "stdafx.h"
truelight@0: #include "ttd.h"
truelight@0: #include "vehicle.h"
truelight@0: #include "command.h"
truelight@0: #include "pathfind.h"
truelight@0: #include "station.h"
truelight@0: #include "table/train_cmd.h"
truelight@0: #include "gfx.h"
truelight@0: #include "news.h"
truelight@0: #include "engine.h"
truelight@0: #include "player.h"
truelight@0: 
truelight@0: 
truelight@0: #define is_firsthead_sprite(spritenum) \
truelight@0: 	(is_custom_sprite(spritenum) \
truelight@0: 		? is_custom_firsthead_sprite(spritenum) \
truelight@0: 		: _engine_sprite_add[spritenum] == 0)
truelight@0: 
truelight@0: 
truelight@0: static const byte _vehicle_initial_x_fract[4] = {10,8,4,8};
truelight@0: static const byte _vehicle_initial_y_fract[4] = {8,4,8,10};
truelight@0: static const byte _state_dir_table[4] = { 0x20, 8, 0x10, 4 };
truelight@0: 
truelight@0: static const byte _signal_onedir[14] = {
truelight@0: 	0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0, 
truelight@0: 	0x40, 0x40, 0x40, 0x10, 0x80, 0x20
truelight@0: };
truelight@0: 
truelight@0: static const byte _signal_otherdir[14] = {
truelight@0: 	0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0,
truelight@0: 	0x80, 0x80, 0x80, 0x20, 0x40, 0x10
truelight@0: };
truelight@0: 
truelight@0: void UpdateTrainAcceleration(Vehicle *v)
truelight@0: {
truelight@0: 	uint acc, power=0, max_speed=5000, weight=0;
truelight@0: 	Vehicle *u = v;
truelight@0: 
truelight@0: 	assert(v->subtype == 0);
truelight@0: 
truelight@0: 	// compute stuff like max speed, power, and weight.
truelight@0: 	do {
truelight@0: 		const RailVehicleInfo *rvi = &_rail_vehicle_info[u->engine_type];
truelight@0: 		
truelight@0: 		// power is sum of the power for all engines
truelight@0: 		power += rvi->power;
truelight@0: 
truelight@0: 		// limit the max speed to the speed of the slowest vehicle.
truelight@0: 		if (rvi->max_speed && rvi->max_speed <= max_speed) max_speed = rvi->max_speed;
truelight@0: 
truelight@0: 		// weight is the sum of the weight of the wagon and the weight of the cargo.
truelight@0: 		weight += rvi->weight;
truelight@0: 		weight += (_cargoc.weights[u->cargo_type] * u->cargo_count) >> 4;
truelight@0: 
truelight@0: 	} while ( (u=u->next) != NULL);
truelight@0: 	
truelight@0: 	// these are shown in the UI
truelight@0: 	v->u.rail.cached_weight = weight;
truelight@0: 	v->u.rail.cached_power = power;
truelight@0: 	v->max_speed = max_speed;
truelight@0: 
truelight@0: 	assert(weight != 0);
truelight@0: 
truelight@0: 	// compute acceleration
truelight@0: 	acc = power / weight * 4;
truelight@0: 
truelight@0: 	if (acc >= 255) acc=255;
truelight@0: 	if (acc == 0) acc++;
truelight@0: 
truelight@0: 	v->acceleration = (byte)acc;
truelight@0: }
truelight@0: 
truelight@0: #define F_GRAV 9.82f
truelight@0: #define F_THETA 0.05f
truelight@0: 
truelight@0: #define F_HP_KW 0.74569f
truelight@0: #define F_KPH_MS 0.27778f
truelight@0: #define F_MU 0.3f
truelight@0: 
truelight@0: #define F_COEF_FRIC 0.04f
truelight@0: #define F_COEF_ROLL 0.18f
truelight@0: 
truelight@0: #define F_CURVE_FACTOR (1/96.f)
truelight@0: 
truelight@0: bool IsTunnelTile(TileIndex tile);
truelight@0: 
truelight@0: static int GetRealisticAcceleration(Vehicle *v)
truelight@0: {
truelight@0: 	uint emass = 0;
truelight@0: 	Vehicle *u = v;
truelight@0: 	float f = 0.0f, spd;
truelight@0: 	int curves = 0;
truelight@0: 
truelight@0: 	assert(v->subtype == 0);
truelight@0: 
truelight@0: 	// compute inclination force and number of curves.
truelight@0: 	do {
truelight@0: 		const RailVehicleInfo *rvi = &_rail_vehicle_info[u->engine_type];
truelight@0: 		uint mass = rvi->weight + ((_cargoc.weights[u->cargo_type] * u->cargo_count) >> 4);
truelight@0: 		if (rvi->power) emass += mass;
truelight@0: 
truelight@0: 		if (u->u.rail.flags & VRF_GOINGUP) {
truelight@0: 			f += (float)mass * ( -F_GRAV * F_THETA);
truelight@0: 		} else if (u->u.rail.flags & VRF_GOINGDOWN) {
truelight@0: 			f += (float)mass * ( F_GRAV * F_THETA);
truelight@0: 		}
truelight@0: 
truelight@0: 		// compute curve penalty..
truelight@0: 		if (u->next != NULL) {
truelight@0: 			uint diff = (u->direction - u->next->direction) & 7;
truelight@0: 			if (diff) {
truelight@0: 				curves += (diff == 1 || diff == 7) ? 1 : 3;
truelight@0: 			}
truelight@0: 		}
truelight@0: 	} while ((u = u->next) != NULL);
truelight@0: 
truelight@0: 	spd = (float)(v->cur_speed ? v->cur_speed : 1);
truelight@0: 
truelight@0: 	// compute tractive effort
truelight@0: 	{
truelight@0: 		float te = (float)v->u.rail.cached_power * (F_HP_KW/F_KPH_MS) / spd;
truelight@0: 		float te2 = (float)emass * (F_MU * F_GRAV);
truelight@0: 		if (te > te2) te = te2;
truelight@0: 		f += te;
truelight@0: 	}
truelight@0: 		
truelight@0: 	// add air resistance
truelight@0: 	{
truelight@0: 		float cx = 1.0f; // NOT DONE
truelight@0: 		
truelight@0: 		// air resistance is doubled in tunnels.
truelight@0: 		if (v->vehstatus == 0x40) cx *= 2;
truelight@0: 
truelight@0: 		f -= cx * spd * spd * (F_KPH_MS * F_KPH_MS * 0.001f); 
truelight@0: 	}
truelight@0: 
truelight@0: 	// after this f contains the acceleration.
truelight@0: 	f /= (float)v->u.rail.cached_weight;
truelight@0: 
truelight@0: 	// add friction to sum of forces (avoid mul by weight). (0.001 because we want kN)
truelight@0: 	f -= (F_COEF_FRIC * F_GRAV * 0.001f + (F_COEF_ROLL * F_KPH_MS * F_GRAV * 0.001f) * spd);
truelight@0: 
truelight@0: 	// penalty for curves?
truelight@0: 	if (curves)
truelight@0: 		 f -= (float)min(curves, 8) * F_CURVE_FACTOR;
truelight@0: 
truelight@0: 	return (int)(f  * (1.0/(F_KPH_MS * 0.015f)) + 0.5f);
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: int GetTrainImage(Vehicle *v, byte direction)
truelight@0: {
truelight@0: 	int img = v->spritenum;
truelight@0: 	int base;
truelight@0: 
truelight@0: 	if (is_custom_sprite(img)) {
truelight@0: 		base = GetCustomVehicleSprite(v, direction + 4 * is_custom_secondhead_sprite(img));
truelight@0: 		if (base) return base;
truelight@0: 		img = _engine_original_sprites[v->engine_type];
truelight@0: 	}
truelight@0: 	
truelight@0: 	base = _engine_sprite_base[img] + ((direction + _engine_sprite_add[img]) & _engine_sprite_and[img]);
truelight@0: 
truelight@0: 	if (v->cargo_count >= (v->cargo_cap >> 1))
truelight@0: 		base += _wagon_full_adder[img];
truelight@0: 	return base;
truelight@0: }
truelight@0: 
truelight@0: void DrawTrainEngine(int x, int y, int engine, uint32 image_ormod)
truelight@0: {
truelight@0: 	const RailVehicleInfo *rvi = &_rail_vehicle_info[engine];
truelight@0: 	
truelight@0: 	int img = rvi->image_index;
truelight@0: 	uint32 image = 0;
truelight@0: 
truelight@0: 	if (is_custom_sprite(img)) {
truelight@0: 		image = GetCustomEngineSprite(engine, -1, CID_PURCHASE, 0, 0, 6);
truelight@0: 		if (!image) img = _engine_original_sprites[engine];
truelight@0: 	}
truelight@0: 	if (!image) {
truelight@0: 		image = (6 & _engine_sprite_and[img]) + _engine_sprite_base[img];
truelight@0: 	}
truelight@0: 
truelight@0: 	if (rvi->flags & RVI_MULTIHEAD) {
truelight@0: 		DrawSprite(image | image_ormod, x-14, y);
truelight@0: 		x += 15;
truelight@0: 		image = 0;
truelight@0: 		if (is_custom_sprite(img)) {
truelight@0: 			image = GetCustomEngineSprite(engine, -1, CID_PURCHASE, 0, 0, 2);
truelight@0: 			if (!image) img = _engine_original_sprites[engine];
truelight@0: 		}
truelight@0: 		if (!image) {
truelight@0: 			image = ((6 + _engine_sprite_add[img+1]) & _engine_sprite_and[img+1]) + _engine_sprite_base[img+1];	
truelight@0: 		}
truelight@0: 	}
truelight@0: 	DrawSprite(image | image_ormod, x, y);
truelight@0: }
truelight@0: 
truelight@0: void DrawTrainEngineInfo(int engine, int x, int y, int maxw)
truelight@0: {
truelight@0: 	const RailVehicleInfo *rvi = &_rail_vehicle_info[engine];
truelight@0: 	int cap;
truelight@0: 	uint multihead = ((rvi->flags & RVI_MULTIHEAD) ? 1 : 0);
truelight@0: 
truelight@0: 	SET_DPARAM32(0, ((_price.build_railvehicle >> 3) * rvi->base_cost) >> 5);
truelight@0: 	SET_DPARAM16(2, rvi->max_speed * 10 >> 4);
truelight@0: 	SET_DPARAM16(3, rvi->power << multihead);
truelight@0: 	SET_DPARAM16(1, rvi->weight << multihead);
truelight@0: 
truelight@0: 	SET_DPARAM32(4, (rvi->running_cost_base * _price.running_rail[rvi->engclass] >> 8) << multihead);
truelight@0: 	
truelight@0: 	cap = rvi->capacity;
truelight@0: 	SET_DPARAM16(5, STR_8838_N_A);
truelight@0: 	if (cap != 0) {
truelight@0: 		SET_DPARAM16(6, cap << multihead);
truelight@0: 		SET_DPARAM16(5, _cargoc.names_long_p[rvi->cargo_type]);
truelight@0: 	}
truelight@0: 	DrawStringMultiCenter(x, y, STR_885B_COST_WEIGHT_T_SPEED_POWER, maxw);
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: int32 CmdBuildRailWagon(uint engine, uint tile, uint32 flags)
truelight@0: {
truelight@0: 	int32 value;
truelight@0: 	Vehicle *v;
truelight@0: 	const RailVehicleInfo *rvi;
truelight@0: 	int dir;
truelight@0: 	const Engine *e;
truelight@0: 	int x,y;
truelight@0: 
truelight@0: 	rvi = &_rail_vehicle_info[engine];
truelight@0: 	value = (rvi->base_cost * _price.build_railwagon) >> 8;
truelight@0: 
truelight@0: 	if (!(flags & DC_QUERY_COST)) {
truelight@0: 		_error_message = STR_00E1_TOO_MANY_VEHICLES_IN_GAME;
truelight@0: 
truelight@0: 		v = AllocateVehicle();
truelight@0: 		if (v == NULL)
truelight@0: 			return CMD_ERROR;
truelight@0: 
truelight@0: 		if (flags & DC_EXEC) {
truelight@0: 			byte img = rvi->image_index;
truelight@0: 			Vehicle *u;
truelight@0: 
truelight@0: 			v->spritenum = img;
truelight@0: 
truelight@0: 			u = _vehicles;
truelight@0: 			for(;;) {
truelight@0: 				if (u->type == VEH_Train && u->tile == (TileIndex)tile &&
truelight@0: 				    u->subtype == 4 && u->engine_type == engine) {
truelight@0: 					u = GetLastVehicleInChain(u);
truelight@0: 					break;
truelight@0: 				}
truelight@0: 
truelight@0: 				if (++u == endof(_vehicles)) {
truelight@0: 					u = NULL;
truelight@0: 					break;
truelight@0: 				}
truelight@0: 			}
truelight@0: 
truelight@0: 			v->engine_type = engine;
truelight@0: 
truelight@0: 			dir = _map5[tile] & 3;
truelight@0: 
truelight@0: 			v->direction = (byte)(dir*2+1);
truelight@0: 			v->tile = (TileIndex)tile;
truelight@0: 			
truelight@0: 			x = GET_TILE_X(tile)*16 | _vehicle_initial_x_fract[dir];
truelight@0: 			y = GET_TILE_Y(tile)*16 | _vehicle_initial_y_fract[dir];
truelight@0: 
truelight@0: 			v->x_pos = x;
truelight@0: 			v->y_pos = y;
truelight@0: 			v->z_pos = GetSlopeZ(x,y);
truelight@0: 			v->owner = _current_player;
truelight@0: 			v->z_height = 6;
truelight@0: 			v->u.rail.track = 0x80;
truelight@0: 			v->vehstatus = VS_HIDDEN | VS_DEFPAL;
truelight@0: 
truelight@0: 			v->subtype = 4;
truelight@0: 			if (u != NULL) {
truelight@0: 				u->next = v;
truelight@0: 				v->subtype = 2;
truelight@0: 				v->u.rail.first_engine = u->u.rail.first_engine;
truelight@0: 				if (v->u.rail.first_engine == 0xffff && u->subtype == 0)
truelight@0: 					v->u.rail.first_engine = u->engine_type;
truelight@0: 			} else {
truelight@0: 				v->u.rail.first_engine = 0xffff;
truelight@0: 			}
truelight@0: 
truelight@0: 			v->cargo_type = rvi->cargo_type;
truelight@0: 			v->cargo_cap = rvi->capacity;
truelight@0: 			v->value = value;
truelight@0: //			v->day_counter = 0;
truelight@0: 
truelight@0: 			e = &_engines[engine];
truelight@0: 			v->u.rail.railtype = e->railtype;
truelight@0: 			
truelight@0: 			v->build_year = _cur_year;
truelight@0: 			v->type = VEH_Train;
truelight@0: 			v->cur_image = 0xAC2;
truelight@0: 	
truelight@0: 			_new_wagon_id = v->index;
truelight@0: 
truelight@0: 			VehiclePositionChanged(v);
truelight@0: 
truelight@0: 			InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	return value;
truelight@0: }
truelight@0: 
truelight@0: // Move all free vehicles in the depot to the train
truelight@0: static void NormalizeTrainVehInDepot(Vehicle *u)
truelight@0: {
truelight@0: 	Vehicle *v;
truelight@0: 	FOR_ALL_VEHICLES(v) {
truelight@0: 		if (v->type == VEH_Train && v->subtype==4 &&
truelight@0: 				v->tile == u->tile &&
truelight@0: 				v->u.rail.track == 0x80) {
truelight@0: 			if (DoCommandByTile(0,v->index | (u->index<<16), 1, DC_EXEC, CMD_MOVE_RAIL_VEHICLE) == CMD_ERROR)
truelight@0: 				break;
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static const byte _railveh_unk1[] = {
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 1, 1, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 1, 0, 1, 0,
truelight@0: 	0, 1, 1, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 1,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0,
truelight@0: };
truelight@0: 
truelight@0: static const byte _railveh_score[] = {
truelight@0: 	1, 4, 7, 19, 20, 30, 31, 19,
truelight@0: 	20, 21, 22, 10, 11, 30, 31, 32,
truelight@0: 	33, 34, 35, 29, 45, 32, 50, 40,
truelight@0: 	41, 51, 52, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 60, 62,
truelight@0: 	63, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 70, 71, 72, 73,
truelight@0: 	74, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0, 0, 0, 0, 0,
truelight@0: 	0, 0, 0, 0,
truelight@0: };
truelight@0: 
truelight@0: 
truelight@0: static int32 EstimateTrainCost(const RailVehicleInfo *rvi)
truelight@0: {
truelight@0: 	return (rvi->base_cost * (_price.build_railvehicle >> 3)) >> 5;
truelight@0: }
truelight@0: 
truelight@0: /* Build a railroad vehicle
truelight@0:  * p1 = vehicle type id
truelight@0:  */
truelight@0: 
truelight@0: int32 CmdBuildRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	const RailVehicleInfo *rvi;
truelight@0: 	int value,dir;
truelight@0: 	Vehicle *v, *u;
truelight@0: 	byte unit_num;
truelight@0: 	Engine *e;
truelight@0: 	uint tile;
truelight@0: 
truelight@0: 	_cmd_build_rail_veh_var1 = 0;
truelight@0: 	
truelight@0: 	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);
truelight@0: 
truelight@0: 	tile = TILE_FROM_XY(x,y);
truelight@0: 	rvi = &_rail_vehicle_info[p1];
truelight@0: 	
truelight@0: 	if (rvi->flags & RVI_WAGON) {
truelight@0: 		return CmdBuildRailWagon(p1, tile, flags);
truelight@0: 	}
truelight@0: 
truelight@0: 	value = EstimateTrainCost(rvi);
truelight@0: 
truelight@0: 	if (!(flags & DC_QUERY_COST)) {
truelight@0: 		v = AllocateVehicle();
truelight@0: 		if (v == NULL || _ptr_to_next_order >= endof(_order_array))
truelight@0: 			return_cmd_error(STR_00E1_TOO_MANY_VEHICLES_IN_GAME);
truelight@0: 
truelight@0: 		unit_num = GetFreeUnitNumber(VEH_Train);
truelight@0: 		if (unit_num > _patches.max_trains)
truelight@0: 			return_cmd_error(STR_00E1_TOO_MANY_VEHICLES_IN_GAME);
truelight@0: 
truelight@0: 		if (flags & DC_EXEC) {
truelight@0: 			v->unitnumber = unit_num;
truelight@0: 
truelight@0: 			dir = _map5[tile] & 3;
truelight@0: 
truelight@0: 			v->direction = (byte)(dir*2+1);
truelight@0: 			v->tile = (TileIndex)tile;
truelight@0: 			v->owner = _current_player;
truelight@0: 			v->x_pos = (x |= _vehicle_initial_x_fract[dir]);
truelight@0: 			v->y_pos = (y |= _vehicle_initial_y_fract[dir]);
truelight@0: 			v->z_pos = GetSlopeZ(x,y);
truelight@0: 			v->z_height = 6;
truelight@0: 			v->u.rail.track = 0x80;
truelight@0: 			v->u.rail.first_engine = 0xffff;
truelight@0: 			v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;
truelight@0: //			v->subtype = 0;
truelight@0: 			v->spritenum = rvi->image_index;
truelight@0: 			v->cargo_type = rvi->cargo_type;
truelight@0: 			v->cargo_cap = rvi->capacity;
truelight@0: 			v->max_speed = rvi->max_speed;
truelight@0: //			v->cargo_count = 0;
truelight@0: 			v->value = value;
truelight@0: //			v->day_counter = 0;
truelight@0: //			v->next_order = 0;
truelight@0: //			v->next_station = 0;
truelight@0: //			v->load_unload_time_rem = 0;
truelight@0: //			v->progress = 0;
truelight@0: //			v->targetairport = 0;
truelight@0: //			v->crash_anim_pos = 0;
truelight@0: 			v->last_station_visited = 0xff;
truelight@0: 			v->dest_tile = 0;
truelight@0: //			v->profit_last_year = 0;
truelight@0: //			v->profit_this_year = 0;
truelight@0: 			
truelight@0: 			v->engine_type = (byte)p1;
truelight@0: 			e = &_engines[p1];
truelight@0: 
truelight@0: 			v->reliability = e->reliability;
truelight@0: 			v->reliability_spd_dec = e->reliability_spd_dec;
truelight@0: 			v->max_age = e->lifelength * 366;
truelight@0: 			
truelight@0: 			v->string_id = STR_SV_TRAIN_NAME;
truelight@0: //			v->cur_speed = 0;
truelight@0: //			v->subspeed = 0;
truelight@0: 			v->u.rail.railtype = e->railtype;
truelight@0: 			_new_train_id = v->index;
truelight@0: //			v->cur_order_index = 0;
truelight@0: //			v->num_orders = 0;
truelight@0: 			
truelight@0: 			*(v->schedule_ptr = _ptr_to_next_order++) = 0;
truelight@0: //			v->next_in_chain = 0xffff;
truelight@0: //			v->next = NULL;
truelight@0: 			
truelight@0: 			v->service_interval = _patches.servint_trains;
truelight@0: //			v->breakdown_ctr = 0;
truelight@0: //			v->breakdowns_since_last_service = 0;
truelight@0: //			v->unk4D = 0;
truelight@0: 			v->date_of_last_service = _date;
truelight@0: 			v->build_year = _cur_year;
truelight@0: 			v->type = VEH_Train;
truelight@0: 			v->cur_image = 0xAC2;
truelight@0: 
truelight@0: 			VehiclePositionChanged(v);
truelight@0: 
truelight@0: 			if (rvi->flags&RVI_MULTIHEAD && (u=AllocateVehicle()) != NULL) {
truelight@0: 				u->direction = v->direction;
truelight@0: 				u->owner = v->owner;
truelight@0: 				u->tile = v->tile;
truelight@0: 				u->x_pos = v->x_pos;
truelight@0: 				u->y_pos = v->y_pos;
truelight@0: 				u->z_pos = v->z_pos;
truelight@0: 				u->z_height = 6;
truelight@0: 				u->u.rail.track = 0x80;
truelight@0: 				v->u.rail.first_engine = 0xffff;
truelight@0: 				u->vehstatus = VS_HIDDEN | VS_DEFPAL;
truelight@0: 				u->subtype = 2;
truelight@0: 				u->spritenum = v->spritenum + 1;
truelight@0: 				u->cargo_type = v->cargo_type;
truelight@0: 				u->cargo_cap = v->cargo_cap;
truelight@0: 				u->u.rail.railtype = v->u.rail.railtype;
truelight@0: //				u->next_in_chain = 0xffff;
truelight@0: 				v->next = u;
truelight@0: 				u->engine_type = v->engine_type;
truelight@0: 				u->build_year = v->build_year;
truelight@0: 				v->value = u->value = v->value >> 1;
truelight@0: //				u->day_counter = 0;
truelight@0: 				u->type = VEH_Train;
truelight@0: 				u->cur_image = 0xAC2;
truelight@0: 				VehiclePositionChanged(u);
truelight@0: 			}
truelight@0: 
truelight@0: 			UpdateTrainAcceleration(v);
truelight@0: 			NormalizeTrainVehInDepot(v);
truelight@0: 
truelight@0: 			InvalidateWindow(WC_VEHICLE_DEPOT, tile);
truelight@0: 			InvalidateWindow(WC_TRAINS_LIST, v->owner);
truelight@0: 			InvalidateWindow(WC_COMPANY, v->owner);
truelight@0: 		}
truelight@0: 	}
truelight@0: 	_cmd_build_rail_veh_var1 = _railveh_unk1[p1];
truelight@0: 	_cmd_build_rail_veh_score = _railveh_score[p1];
truelight@0: 	return value;		
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: bool IsTrainDepotTile(TileIndex tile)
truelight@0: {
truelight@0: 	return IS_TILETYPE(tile, MP_RAILWAY) &&
truelight@0: 					(_map5[tile] & 0xFC) == 0xC0;
truelight@0: }
truelight@0: 
truelight@0: bool IsTunnelTile(TileIndex tile)
truelight@0: {
truelight@0: 	return IS_TILETYPE(tile, MP_TUNNELBRIDGE) &&
truelight@0: 				 (_map5[tile]&0x80) == 0;
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: int CheckStoppedInDepot(Vehicle *v)
truelight@0: {
truelight@0: 	int count;
truelight@0: 	TileIndex tile = v->tile;
truelight@0: 	
truelight@0: 	/* check if stopped in a depot */
truelight@0: 	if (!IsTrainDepotTile(tile) || v->cur_speed != 0) {
truelight@0: errmsg:
truelight@0: 		_error_message = STR_881A_TRAINS_CAN_ONLY_BE_ALTERED;
truelight@0: 		return -1;
truelight@0: 	}
truelight@0: 
truelight@0: 	count = 0;
truelight@0: 	do {
truelight@0: 		count++;
truelight@0: 		if (v->u.rail.track != 0x80 || v->tile != (TileIndex)tile || 
truelight@0: 				(v->subtype==0 && !(v->vehstatus&VS_STOPPED)))
truelight@0: 			goto errmsg;
truelight@0: 	} while ( (v=v->next) != NULL);
truelight@0: 
truelight@0: 	return count;
truelight@0: }
truelight@0: 
truelight@0: // unlink a rail wagon from the linked list.
truelight@0: // returns the new value of first
truelight@0: static Vehicle *UnlinkWagon(Vehicle *v, Vehicle *first)
truelight@0: {
truelight@0: 	// unlinking the first vehicle of the chain?
truelight@0: 	v->u.rail.first_engine = 0xffff;
truelight@0: 	if (v == first) {
truelight@0: 		Vehicle *u;
truelight@0: 		if ((v=v->next) == NULL) return NULL;
truelight@0: 		for (u=v; u; u=u->next) u->u.rail.first_engine = v->engine_type;
truelight@0: 		v->subtype = 4;
truelight@0: 		return v;
truelight@0: 	} else {
truelight@0: 		Vehicle *u;
truelight@0: 		for(u=first; u->next!=v; u=u->next) {}
truelight@0: 		u->next = v->next;
truelight@0: 		return first;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static Vehicle *FindGoodVehiclePos(Vehicle *src)
truelight@0: {
truelight@0: 	Vehicle *dst;
truelight@0: 	uint16 eng = src->engine_type;
truelight@0: 	TileIndex tile = src->tile;
truelight@0: 
truelight@0: 	FOR_ALL_VEHICLES(dst) {
truelight@0: 		if (dst->type==VEH_Train && dst->subtype==4 && dst->tile==tile) {
truelight@0: 			// check so all vehicles in the line have the same engine.
truelight@0: 			Vehicle *v = dst;
truelight@0: 			while (v->engine_type == eng) {
truelight@0: 				if ((v = v->next) == NULL) return dst;
truelight@0: 			}
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	return NULL;
truelight@0: }
truelight@0: 
truelight@0: /* p1 & 0xffff= source vehicle index
truelight@0:    p1 & 0xffff0000 = what wagon to put the wagon AFTER, 0xffff0000 to make a new line
truelight@0: 	 p2 & 1 = move all vehicles following the vehicle..
truelight@0:  */
truelight@0: 
truelight@0: int32 CmdMoveRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	Vehicle *src, *dst, *src_head, *dst_head;
truelight@0: 	bool is_loco;
truelight@0: 
truelight@0: 	src = &_vehicles[p1 & 0xffff];
truelight@0: 	if (src->type != VEH_Train) return CMD_ERROR;
truelight@0: 
truelight@0: 	is_loco = !(_rail_vehicle_info[src->engine_type].flags & RVI_WAGON)
truelight@0: 	          && is_firsthead_sprite(src->spritenum);
truelight@0: 
truelight@0: 	// if nothing is selected as destination, try and find a matching vehicle to drag to.
truelight@0: 	if (((int32)p1 >> 16) == -1) {	
truelight@0: 		dst = NULL;
truelight@0: 		if (!is_loco) dst = FindGoodVehiclePos(src);
truelight@0: 	} else {
truelight@0: 		dst = &_vehicles[((int32)p1 >> 16)];
truelight@0: 	}
truelight@0: 
truelight@0: 	// don't move the same vehicle..
truelight@0: 	if (src == dst)
truelight@0: 		return 0;
truelight@0: 	
truelight@0: 	/* the player must be the owner */
truelight@0: 	if (!CheckOwnership(src->owner) || (dst!=NULL && !CheckOwnership(dst->owner)))
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 	/* locate the head of the two chains */
truelight@0: 	src_head = GetFirstVehicleInChain(src);
truelight@0: 	dst_head = NULL;
truelight@0: 	if (dst != NULL) dst_head = GetFirstVehicleInChain(dst);
truelight@0: 	
truelight@0: 	/* check if all vehicles in the source train are stopped */
truelight@0: 	if (CheckStoppedInDepot(src_head) < 0)
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 	/* check if all the vehicles in the dest train are stopped,
truelight@0: 	 * and that the length of the dest train is no longer than XXX vehicles */
truelight@0: 	if (dst_head != NULL) {
truelight@0: 		int num = CheckStoppedInDepot(dst_head);
truelight@0: 		if (num < 0)
truelight@0: 			return CMD_ERROR;
truelight@0: 
truelight@0: 		if (num > (_patches.mammoth_trains ? 100 : 9) && dst_head->subtype==0)
truelight@0: 			return_cmd_error(STR_8819_TRAIN_TOO_LONG);
truelight@0: 
truelight@0: 		// if it's a multiheaded vehicle we're dragging to, drag to the vehicle before..
truelight@0: 		while (is_custom_secondhead_sprite(dst->spritenum)
truelight@0: 		       || (!is_custom_sprite(dst->spritenum) && _engine_sprite_add[dst->spritenum] != 0)) {
truelight@0: 			Vehicle *v = GetPrevVehicleInChain(dst);
truelight@0: 			if (!v || src == v) break;
truelight@0: 			dst = v;
truelight@0: 		}
truelight@0: 
truelight@0: 		assert(dst_head->tile == src_head->tile);
truelight@0: 	}
truelight@0: 
truelight@0: 	// when moving all wagons, we can't have the same src_head and dst_head
truelight@0: 	if (p2 & 1 && src_head == dst_head)
truelight@0: 		return 0;
truelight@0: 
truelight@0: 	// moving a loco to a new line?, then we need to assign a unitnumber.
truelight@0: 	if (dst == NULL && src->subtype != 0 && is_loco) {
truelight@0: 		uint unit_num = GetFreeUnitNumber(VEH_Train);
truelight@0: 		if (unit_num > _patches.max_trains)
truelight@0: 			return_cmd_error(STR_00E1_TOO_MANY_VEHICLES_IN_GAME);
truelight@0: 
truelight@0: 		if (flags & DC_EXEC)
truelight@0: 			src->unitnumber = unit_num;
truelight@0: 	}
truelight@0: 
truelight@0: 
truelight@0: 	/* do it? */
truelight@0: 	if (flags & DC_EXEC) {
truelight@0: 		if (p2 & 1) {
truelight@0: 			// unlink ALL wagons
truelight@0: 			if (src != src_head) {
truelight@0: 				Vehicle *v = src_head;
truelight@0: 				while (v->next != src) v=v->next;
truelight@0: 				v->next = NULL;
truelight@0: 			}
truelight@0: 		} else {
truelight@0: 			// unlink single wagon from linked list
truelight@0: 			UnlinkWagon(src, src_head);
truelight@0: 			src->next = NULL;
truelight@0: 		}
truelight@0: 
truelight@0: 		if (dst == NULL) {
truelight@0: 			// move the train to an empty line. for locomotives, we set the type to 0. for wagons, 4.
truelight@0: 			if (is_loco) {
truelight@0: 				if (src->subtype != 0) {
truelight@0: 					// setting the type to 0 also involves setting up the schedule_ptr field.
truelight@0: 					src->subtype = 0;
truelight@0: 					assert(src->schedule_ptr == NULL);
truelight@0: 					*(src->schedule_ptr = _ptr_to_next_order++) = 0;
truelight@0: 					src->num_orders = 0;
truelight@0: 				}
truelight@0: 				dst_head = src;
truelight@0: 			} else {
truelight@0: 				src->subtype = 4;
truelight@0: 			}
truelight@0: 			src->u.rail.first_engine = 0xffff;
truelight@0: 		} else {
truelight@0: 			if (src->subtype == 0) {
truelight@0: 				// the vehicle was previously a loco. need to free the schedule list and delete vehicle windows etc.
truelight@0: 				DeleteWindowById(WC_VEHICLE_VIEW, src->index);
truelight@0: 				DeleteVehicleSchedule(src);
truelight@0: 			}
truelight@0: 			
truelight@0: 			src->subtype = 2;
truelight@0: 			src->unitnumber = 0; // doesn't occupy a unitnumber anymore.
truelight@0: 
truelight@0: 			// setup first_engine
truelight@0: 			src->u.rail.first_engine = dst->u.rail.first_engine;
truelight@0: 			if (src->u.rail.first_engine == 0xffff && dst->subtype == 0)
truelight@0: 				src->u.rail.first_engine = dst->engine_type;
truelight@0: 
truelight@0: 			// link in the wagon(s) in the chain.
truelight@0: 			{
truelight@0: 				Vehicle *v = src;
truelight@0: 				while (v->next != NULL) {
truelight@0: 					v->next->u.rail.first_engine = v->u.rail.first_engine;
truelight@0: 					v = v->next;
truelight@0: 				}
truelight@0: 				v->next = dst->next;
truelight@0: 			}
truelight@0: 			dst->next = src;
truelight@0: 		}
truelight@0: 
truelight@0: 		if (src_head->subtype == 0)
truelight@0: 			UpdateTrainAcceleration(src_head);
truelight@0: 		InvalidateWindow(WC_VEHICLE_DETAILS, src_head->index);
truelight@0: 
truelight@0: 		if (dst_head) {
truelight@0: 			if (dst_head->subtype == 0)
truelight@0: 				UpdateTrainAcceleration(dst_head);
truelight@0: 			InvalidateWindow(WC_VEHICLE_DETAILS, dst_head->index);
truelight@0: 		}
truelight@0: 
truelight@0: 		InvalidateWindow(WC_VEHICLE_DEPOT, src_head->tile);
truelight@0: 		InvalidateWindow(WC_TRAINS_LIST, _current_player);
truelight@0: 	}
truelight@0: 
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
truelight@0: /* p1 = train to start / stop */
truelight@0: int32 CmdStartStopTrain(int x, int y, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	Vehicle *v;
truelight@0: 
truelight@0: 	v = &_vehicles[p1];
truelight@0: 
truelight@0: 	if (!CheckOwnership(v->owner))
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 	if (flags & DC_EXEC) {
truelight@0: 		v->u.rail.days_since_order_progr = 0;
truelight@0: 		v->vehstatus ^= VS_STOPPED;
truelight@0: 		InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
truelight@0: 		InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
truelight@0: 	}
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
truelight@0: // p1 = wagon/loco index
truelight@0: // p2 = mode
truelight@0: //   0: sell just the vehicle
truelight@0: //   1: sell the vehicle and all vehicles that follow it in the chain
truelight@0: //   2: when selling attached locos, rearrange all vehicles after it to separate lines.
truelight@0: int32 CmdSellRailWagon(int x, int y, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	Vehicle *v, *first,*last;
truelight@0: 	int32 cost;
truelight@0: 
truelight@0: 	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);
truelight@0: 
truelight@0: 	v = &_vehicles[p1];
truelight@0: 
truelight@0: 	if (!CheckOwnership(v->owner))
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 	// get first vehicle in chain
truelight@0: 	first = v;
truelight@0: 	if (first->subtype != 0) {
truelight@0: 		first = GetFirstVehicleInChain(first);
truelight@0: 		last = NULL;
truelight@0: 	} else {
truelight@0: 		if (p2 != 1) {
truelight@0: 			// sell last part of multiheaded?
truelight@0: 			last = GetLastVehicleInChain(v);
truelight@73: 			// Check if the end-part is the same engine and check if it is the rear-end
truelight@73: 			if (last->engine_type != first->engine_type || is_firsthead_sprite(last->spritenum))
truelight@0: 				last = NULL;
truelight@0: 		} else {
truelight@0: 			last = NULL;
truelight@0: 		}
truelight@0: 	}
truelight@0: 	
truelight@0: 	// make sure the vehicle is stopped in the depot
truelight@0: 	if (CheckStoppedInDepot(first) < 0)
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 
truelight@0: 	if (flags & DC_EXEC) {
truelight@0: 		// always redraw the depot. maybe redraw train list
truelight@0: 		InvalidateWindow(WC_VEHICLE_DEPOT, first->tile);
truelight@0: 		if (first->subtype == 0) InvalidateWindow(WC_TRAINS_LIST, first->owner);
truelight@0: 		// when selling an attached locomotive. we need to delete its window.
truelight@0: 		if (v->subtype == 0) {
truelight@0: 			DeleteWindowById(WC_VEHICLE_VIEW, v->index);
truelight@0: 			
truelight@0: 			// rearrange all vehicles that follow to separate lines.
truelight@0: 			if (p2 == 2) {
truelight@0: 				Vehicle *u,*tmp;
truelight@0: 				u = v->next;
truelight@0: 				while (u != last) {
truelight@0: 					tmp = u;
truelight@0: 					u = u->next;
truelight@0: 					DoCommandByTile(tmp->tile, tmp->index | ((-1)<<16), 0, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);		
truelight@0: 				}
truelight@0: 			}
truelight@0: 		}
truelight@0: 
truelight@0: 		// delete the vehicles
truelight@0: 		cost = 0;
truelight@0: 		for(;;) {
truelight@0: 			Vehicle *tmp;
truelight@0: 
truelight@0: 			assert(first);
truelight@0: 			first = UnlinkWagon(v, first);
truelight@0: 			cost -= v->value;
truelight@0: 			tmp = v;
truelight@0: 			v = v->next;
truelight@0: 			DeleteVehicle(tmp);
truelight@0: 			if (v == NULL || p2 != 1) break;
truelight@0: 		}
truelight@0: 
truelight@0: 		// delete last vehicle of multiheaded train?
truelight@0: 		if (last) {
truelight@0: 			first = UnlinkWagon(last, first);
truelight@0: 			cost -= last->value;
truelight@0: 			DeleteVehicle(last);
truelight@0: 		}
truelight@0: 		
truelight@0: 		// an attached train changed?
truelight@0: 		if (first && first->subtype == 0) {
truelight@0: 			UpdateTrainAcceleration(first);
truelight@0: 			InvalidateWindow(WC_VEHICLE_DETAILS, first->index);
truelight@0: 		}
truelight@0: 	} else {
truelight@0: 		cost = 0;
truelight@0: 		for(;;) {
truelight@0: 			cost -= v->value;
truelight@0: 			if ((v=v->next) == NULL || p2 != 1) break;
truelight@0: 		}
truelight@0: 		if (last) cost -= last->value;
truelight@0: 	}
truelight@0: 
truelight@0: 	return cost;
truelight@0: }
truelight@0: 
truelight@0: static void UpdateTrainDeltaXY(Vehicle *v, int direction)
truelight@0: {
truelight@0: #define MKIT(a,b,c,d) ((a&0xFF)<<24) | ((b&0xFF)<<16) | ((c&0xFF)<<8) | ((d&0xFF)<<0)
truelight@0: 	static const uint32 _delta_xy_table[8] = {
truelight@0: 		MKIT(3, 3, -1, -1),
truelight@0: 		MKIT(3, 7, -1, -3),
truelight@0: 		MKIT(3, 3, -1, -1),
truelight@0: 		MKIT(7, 3, -3, -1),
truelight@0: 		MKIT(3, 3, -1, -1),
truelight@0: 		MKIT(3, 7, -1, -3),
truelight@0: 		MKIT(3, 3, -1, -1),
truelight@0: 		MKIT(7, 3, -3, -1),
truelight@0: 	};
truelight@0: #undef MKIT
truelight@0: 
truelight@0: 	uint32 x = _delta_xy_table[direction];
truelight@0: 
truelight@0: 	v->x_offs = (byte)x;
truelight@0: 	v->y_offs = (byte)(x>>=8);
truelight@0: 	v->sprite_width = (byte)(x>>=8);
truelight@0: 	v->sprite_height = (byte)(x>>=8);
truelight@0: }
truelight@0: 
truelight@0: static void UpdateVarsAfterSwap(Vehicle *v)
truelight@0: {
truelight@0: 	UpdateTrainDeltaXY(v, v->direction);
truelight@0: 	v->cur_image = GetTrainImage(v, v->direction);
truelight@0: 	BeginVehicleMove(v);
truelight@0: 	VehiclePositionChanged(v);
truelight@0: 	EndVehicleMove(v);
truelight@0: }
truelight@0: 
truelight@0: static void SetLastSpeed(Vehicle *v, int spd) {	
truelight@0: 	int old = v->u.rail.last_speed;
truelight@0: 	if (spd != old) {
truelight@0: 		v->u.rail.last_speed = spd;
truelight@0: 		if (_patches.vehicle_speed || !old != !spd)
truelight@0: 			InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void ReverseTrainSwapVeh(Vehicle *v, int l, int r)
truelight@0: {
truelight@0: 	Vehicle *a, *b;
truelight@0: 
truelight@0: 	/* locate vehicles to swap */
truelight@0: 	for(a=v; l!=0; l--) { a = a->next; }
truelight@0: 	for(b=v; r!=0; r--) { b = b->next; }
truelight@0: 
truelight@0: 	if (a != b) {
truelight@0: 		/* swap the hidden bits */
truelight@0: 		{
truelight@0: 			uint16 tmp = (a->vehstatus & ~VS_HIDDEN) | (b->vehstatus&VS_HIDDEN);
truelight@0: 			b->vehstatus = (b->vehstatus & ~VS_HIDDEN) | (a->vehstatus&VS_HIDDEN);
truelight@0: 			a->vehstatus = tmp;
truelight@0: 		}
truelight@0: 		
truelight@0: 		/* swap variables */
truelight@0: 		swap_byte(&a->u.rail.track, &b->u.rail.track);
truelight@0: 		swap_byte(&a->direction, &b->direction);
truelight@0: 
truelight@0: 		/* toggle direction */
truelight@0: 		if (!(a->u.rail.track & 0x80)) a->direction ^= 4;
truelight@0: 		if (!(b->u.rail.track & 0x80)) b->direction ^= 4;
truelight@0: 		
truelight@0: 		/* swap more variables */
truelight@0: 		swap_int16(&a->x_pos, &b->x_pos);
truelight@0: 		swap_int16(&a->y_pos, &b->y_pos);
truelight@0: 		swap_tile(&a->tile, &b->tile);
truelight@0: 		swap_byte(&a->z_pos, &b->z_pos);
truelight@0: 
truelight@0: 		/* update other vars */
truelight@0: 		UpdateVarsAfterSwap(a);
truelight@0: 		UpdateVarsAfterSwap(b);
truelight@0: 	} else {
truelight@0: 		if (!(a->u.rail.track & 0x80)) a->direction ^= 4;
truelight@0: 		UpdateVarsAfterSwap(a);		
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void ReverseTrainDirection(Vehicle *v)
truelight@0: {
truelight@0: 	int l = 0, r = -1;
truelight@0: 	Vehicle *u;
truelight@0: 
truelight@0: 	if (IsTrainDepotTile(v->tile))
truelight@0: 		InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
truelight@0: 
truelight@0: 	// count number of vehicles
truelight@0: 	u = v;
truelight@0: 	do r++; while ( (u = u->next) != NULL );
truelight@0: 
truelight@0: 	/* swap start<>end, start+1<>end-1, ... */
truelight@0: 	do {
truelight@0: 		ReverseTrainSwapVeh(v, l++, r--);
truelight@0: 	} while (l <= r);
truelight@0: 
truelight@0: 	if (IsTrainDepotTile(v->tile))
truelight@0: 		InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
truelight@0: 
truelight@0: 	v->u.rail.flags &= ~VRF_REVERSING;
truelight@0: }
truelight@0: 
truelight@0: /* p1 = vehicle */
truelight@0: int32 CmdReverseTrainDirection(int x, int y, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	Vehicle *v;
truelight@0: 
truelight@0: 	v = &_vehicles[p1];
truelight@0: 
truelight@0: 	if (!CheckOwnership(v->owner))
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 	_error_message = STR_EMPTY;
truelight@0: 
truelight@0: //	if (v->u.rail.track & 0x80 || IsTrainDepotTile(v->tile))
truelight@0: //		return CMD_ERROR;
truelight@0: 
truelight@0: 	if (v->u.rail.crash_anim_pos != 0 || v->breakdown_ctr != 0)
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 	if (flags & DC_EXEC) {
truelight@0: 		if (_patches.realistic_acceleration && v->cur_speed != 0) {
truelight@0: 			v->u.rail.flags ^= VRF_REVERSING;
truelight@0: 		} else {
truelight@0: 			v->cur_speed = 0;
truelight@0: 			SetLastSpeed(v, 0);
truelight@0: 			ReverseTrainDirection(v);
truelight@0: 		}
truelight@0: 	}
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
truelight@0: int32 CmdForceTrainProceed(int x, int y, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	Vehicle *v;
truelight@0: 
truelight@0: 	v = &_vehicles[p1];
truelight@0: 
truelight@0: 	if (!CheckOwnership(v->owner))
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 	if (flags & DC_EXEC)
truelight@0: 		v->u.rail.force_proceed = 0x50;
truelight@0: 	
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
truelight@0: // p1 = vehicle to refit
truelight@0: // p2 = new cargo
truelight@0: 
truelight@0: int32 CmdRefitRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	Vehicle *v;
truelight@0: 	int32 cost;
truelight@0: 	uint num;
truelight@0: 
truelight@0: 	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);
truelight@0: 
truelight@0: 	v = &_vehicles[p1];
truelight@0: 	if (!CheckOwnership(v->owner) || CheckStoppedInDepot(v) < 0)
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 	cost = 0;
truelight@0: 	num = 0;
truelight@0: 
truelight@0: 	do {
truelight@0: 		if (!(_rail_vehicle_info[v->engine_type].flags & RVI_WAGON) && (byte)p2 != v->cargo_type && v->cargo_cap != 0) {
dominik@15: 			cost += (_price.build_railvehicle >> 8);
truelight@0: 			num += v->cargo_cap;
truelight@0: 			if (flags & DC_EXEC) {
truelight@0: 				v->cargo_count = 0;
truelight@0: 				v->cargo_type = (byte)p2;
truelight@0: 				InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
truelight@0: 			}
truelight@0: 		}	
truelight@0: 	} while ( (v=v->next) != NULL);
truelight@0: 
truelight@0: 	_returned_refit_amount = num;
truelight@0: 
truelight@0: 	return cost;
truelight@0: }
truelight@0: 
truelight@0: int GetDepotByTile(uint tile)
truelight@0: {
truelight@0: 	Depot *d;
truelight@0: 	int i=0;
truelight@0: 	for(d=_depots; d->xy != (TileIndex)tile; d++) { i++; }
truelight@0: 	return i;
truelight@0: }
truelight@0: 
truelight@0: typedef struct TrainFindDepotData {
truelight@0: 	uint best_length;
truelight@0: 	uint tile;
truelight@0: 	byte owner;
truelight@0: } TrainFindDepotData;
truelight@0: 
truelight@0: static bool TrainFindDepotEnumProc(uint tile, TrainFindDepotData *tfdd, int track, uint length, byte *state)
truelight@0: {
truelight@0: 	if (IS_TILETYPE(tile, MP_RAILWAY) && _map_owner[tile] == tfdd->owner) {
truelight@0: 		if ((_map5[tile] & ~0x3) == 0xC0) {
truelight@0: 			if (length < tfdd->best_length) {
truelight@0: 				tfdd->best_length = length;
truelight@0: 				tfdd->tile = tile;
truelight@0: 			}
truelight@0: 			return true;
truelight@0: 		}
truelight@0: 
truelight@0: 		// make sure the train doesn't run against a oneway signal
truelight@0: 		if ((_map5[tile] & 0xC0) == 0x40) {
truelight@0: 			if (!(_map3_lo[tile] & _signal_onedir[track]) && _map3_lo[tile] & _signal_otherdir[track])
truelight@0: 				return true;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	// stop  searching if we've found a destination that is closer already.
truelight@0: 	return length >= tfdd->best_length;
truelight@0: }
truelight@0: 
truelight@0: // returns the tile of a depot to goto to
truelight@0: static uint FindClosestTrainDepot(Vehicle *v)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	TrainFindDepotData tfdd;
truelight@0: 	uint tile = v->tile;
truelight@0: 
truelight@0: 	if (IsTrainDepotTile(tile))
truelight@0: 		return tile;
truelight@0: 
truelight@0: 	if (v->u.rail.track == 0x40) { tile = GetVehicleOutOfTunnelTile(v); }
truelight@0: 		
truelight@0: 	tfdd.owner = v->owner;
truelight@0: 	tfdd.best_length = (uint)-1;
truelight@0: 
truelight@0: 	if (!_patches.new_depot_finding) {
truelight@0: 		// search in all directions
truelight@0: 		for(i=0; i!=4; i++)
truelight@0: 			NewTrainPathfind(tile, i, (TPFEnumProc*)TrainFindDepotEnumProc, &tfdd, NULL);
truelight@0: 		if (tfdd.best_length != (uint)-1)
truelight@0: 			return tfdd.tile;
truelight@0: 	} else {
truelight@0: 		// search in the forward direction first.
truelight@0: 		i = v->direction >> 1;
truelight@0: 		if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[i]) { i = (i - 1) & 3; }
truelight@0: 		NewTrainPathfind(tile, i, (TPFEnumProc*)TrainFindDepotEnumProc, &tfdd, NULL);
truelight@0: 		if (tfdd.best_length != (uint)-1)
truelight@0: 			return tfdd.tile;
truelight@0: 
truelight@0: 		// search in backwards direction
truelight@0: 		i = (v->direction^4) >> 1;
truelight@0: 		if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[i]) { i = (i - 1) & 3; }
truelight@0: 		NewTrainPathfind(tile, i, (TPFEnumProc*)TrainFindDepotEnumProc, &tfdd, NULL);
truelight@0: 		if (tfdd.best_length != (uint)-1)
truelight@0: 			return tfdd.tile;
truelight@0: 	}
truelight@0: 	
truelight@0: 	return (uint)-1;
truelight@0: }
truelight@0: 
truelight@0: int32 CmdTrainGotoDepot(int x, int y, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	Vehicle *v = &_vehicles[p1];
truelight@0: 	uint depot_tile;
truelight@0: 
truelight@0: 	if ((v->next_order & OT_MASK) == OT_GOTO_DEPOT) {
truelight@0: 		if (flags & DC_EXEC) {
truelight@0: 			if (v->next_order & OF_UNLOAD) {
truelight@0: 				v->u.rail.days_since_order_progr = 0;
truelight@0: 				v->cur_order_index++;
truelight@0: 			}
truelight@0: 			
truelight@0: 			v->next_order = OT_DUMMY;
truelight@0: 			InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
truelight@0: 		}
truelight@0: 		return 0;
truelight@0: 	}
truelight@0: 
truelight@0: 	depot_tile = FindClosestTrainDepot(v);
truelight@0: 	if (depot_tile == (uint)-1)
truelight@0: 		return_cmd_error(STR_883A_UNABLE_TO_FIND_ROUTE_TO);
truelight@0: 
truelight@0: 	if (flags & DC_EXEC) {
truelight@0: 		v->dest_tile = depot_tile;
truelight@0: 		v->next_order = OF_NON_STOP | OF_FULL_LOAD | OT_GOTO_DEPOT;
truelight@0: 		v->next_order_param = GetDepotByTile(depot_tile);
truelight@0: 		InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
truelight@0: 	}
truelight@0: 	
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
truelight@0: /* p1 = vehicle
truelight@0:  * p2 = new service int
truelight@0:  */
truelight@0: int32 CmdChangeTrainServiceInt(int x, int y, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
truelight@0: 	Vehicle *v = &_vehicles[p1];
truelight@0: 
truelight@0: 	if (!CheckOwnership(v->owner))
truelight@0: 		return CMD_ERROR;
truelight@0: 
truelight@0: 	if (flags & DC_EXEC) {
truelight@0: 		v->service_interval = (uint16)p2;
truelight@0: 		InvalidateWindowWidget(WC_VEHICLE_DETAILS, v->index, 8);
truelight@0: 	}
truelight@0: 	
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
truelight@0: void OnTick_Train()
truelight@0: {
truelight@0: 	_age_cargo_skip_counter = (_age_cargo_skip_counter == 0) ? 184 : (_age_cargo_skip_counter - 1);
truelight@0: }
truelight@0: 
truelight@0: static const int8 _vehicle_smoke_pos[16] = {
truelight@0: 	-4, -4, -4, 0, 4, 4, 4, 0,
truelight@0: 	-4,  0,  4, 4, 4, 0,-4,-4,
truelight@0: };
truelight@0: 
truelight@0: static void HandleLocomotiveSmokeCloud(Vehicle *v)
truelight@0: {
truelight@0: 	Vehicle *u;
truelight@0: 
truelight@0: 	if (v->vehstatus & VS_TRAIN_SLOWING || v->load_unload_time_rem != 0 || v->cur_speed < 2)
truelight@0: 		return;
truelight@0: 
truelight@0: 	u = v;
truelight@0: 
truelight@0: 	do {
truelight@0: 		int engtype = v->engine_type;
truelight@0: 
truelight@0: 		// no smoke?
truelight@0: 		if (_rail_vehicle_info[engtype].flags & 2
truelight@0: 		    || _engines[engtype].railtype > 0
truelight@0: 		    || (v->vehstatus&VS_HIDDEN) || (v->u.rail.track & 0xC0) )
truelight@0: 			continue;
truelight@0: 
truelight@0: 		switch (_rail_vehicle_info[engtype].engclass) {
truelight@0: 		case 0:
truelight@0: 			// steam smoke.
truelight@0: 			if ( (v->tick_counter&0xF) == 0 && !IsTrainDepotTile(v->tile) && !IsTunnelTile(v->tile)) {
truelight@0: 				CreateEffectVehicleRel(v, 
truelight@0: 					(_vehicle_smoke_pos[v->direction]),
truelight@0: 					(_vehicle_smoke_pos[v->direction+8]),
truelight@0: 					10,
truelight@0: 					EV_STEAM_SMOKE);
truelight@0: 			}
truelight@0: 			break;
truelight@0: 
truelight@0: 		case 1:
truelight@0: 			// diesel smoke
truelight@0: 			if (u->cur_speed <= 40 && !IsTrainDepotTile(v->tile) && !IsTunnelTile(v->tile) && (uint16)Random() <= 0x1E00) {
truelight@0: 				CreateEffectVehicleRel(v, 0,0,10, EV_SMOKE_3);
truelight@0: 			}
truelight@0: 			break;
truelight@0: 
truelight@0: 		case 2:
truelight@0: 			// blue spark
truelight@0: 			if ( (v->tick_counter&0x3) == 0 && !IsTrainDepotTile(v->tile) && !IsTunnelTile(v->tile) && (uint16)Random() <= 0x5B0) {
truelight@0: 				CreateEffectVehicleRel(v, 0,0,10, EV_SMOKE_2);
truelight@0: 			}
truelight@0: 			break;
truelight@0: 		}
truelight@0: 	} while ( (v = v->next) != NULL );
truelight@0: 
truelight@0: }
truelight@0: 
truelight@0: static void TrainPlayLeaveStationSound(Vehicle *v)
truelight@0: {
truelight@0: 	static const byte sfx[3] = { 0x2, 0x8, 0x8 };
truelight@0: 	int engtype = v->engine_type;
truelight@0: 
truelight@0: 	switch (_engines[engtype].railtype) {
truelight@0: 		case 0: SndPlayVehicleFx(sfx[_rail_vehicle_info[engtype].engclass], v); break;
truelight@0: 		case 1: SndPlayVehicleFx(0x41, v); break;
truelight@0: 		case 2: SndPlayVehicleFx(0x47, v); break;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static bool CheckTrainStayInDepot(Vehicle *v)
truelight@0: {
truelight@0: 	Vehicle *u;
truelight@0: 	if (v->u.rail.track != 0x80)	// first wagon (eg engine) in depot
truelight@0: 		return false;
truelight@0: 
truelight@0: 	// make sure that all vehicles are in the depot
truelight@0: 	u = GetLastVehicleInChain(v);
truelight@0: 	if (u->u.rail.track != 0x80)
truelight@0: 		return false;
truelight@0: 
truelight@0: 	// fix hung train if both ends are in depots (when here first wagon and last wagon is in depot)
truelight@0: 	// both first and last should be in the same depot, eg on the same tile
truelight@0: 	if (v->tile != u->tile)
truelight@0: 		return false;
truelight@0: 
truelight@0: 	if (v->u.rail.force_proceed == 0) {
truelight@0: 		if (++v->load_unload_time_rem < 37)
truelight@0: 			return true;
truelight@0: 		v->load_unload_time_rem = 0;
truelight@0: 
truelight@0: 		if (UpdateSignalsOnSegment(v->tile, v->direction))
truelight@0: 			return true;
truelight@0: 	}
truelight@0: 
truelight@0: 	TrainPlayLeaveStationSound(v);
truelight@0: 	
truelight@0: 	v->u.rail.track = 1;
truelight@0: 	if (v->direction & 2)
truelight@0: 		v->u.rail.track = 2;
truelight@0: 	
truelight@0: 	v->vehstatus &= ~VS_HIDDEN;
truelight@0: 	v->cur_speed = 0;
truelight@0: 	
truelight@0: 	UpdateTrainDeltaXY(v, v->direction);
truelight@0: 	v->cur_image = GetTrainImage(v, v->direction);
truelight@0: 	VehiclePositionChanged(v);
truelight@0: 	UpdateSignalsOnSegment(v->tile, v->direction);
truelight@0: 	UpdateTrainAcceleration(v);
truelight@0: 	InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
truelight@0: 
truelight@0: 	return false;
truelight@0: }
truelight@0: 
truelight@0: typedef struct TrainTrackFollowerData {
truelight@0: 	TileIndex dest_coords;
truelight@0: 	int station_index; // station index we're heading for
truelight@0: 	uint best_bird_dist;
truelight@0: 	uint best_track_dist;
truelight@0: 	byte best_track;
truelight@0: } TrainTrackFollowerData;
truelight@0: 
truelight@0: static bool TrainTrackFollower(uint tile, TrainTrackFollowerData *ttfd, int track, uint length, byte *state){
truelight@0: 	if (IS_TILETYPE(tile, MP_RAILWAY) && (_map5[tile]&0xC0) == 0x40) {
truelight@0: 		// the tile has a signal
truelight@0: 		byte m3 = _map3_lo[tile];
truelight@0: 		if (!(m3 & _signal_onedir[track])) {
truelight@0: 			// if one way signal not pointing towards us, stop going in this direction.
truelight@0: 			if (m3 & _signal_otherdir[track])
truelight@0: 				return true;
truelight@0: 		} else if (_map2[tile] & _signal_onedir[track]) {
truelight@0: 			// green signal in our direction. either one way or two way.
truelight@0: 			*state = true;
truelight@0: 		} else if (m3 & _signal_otherdir[track]) {
truelight@0: 			// two way signal. unless we passed another green signal on the way,
truelight@0: 			// stop going in this direction.
truelight@0: 			if (!*state) return true;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	// heading for nowhere?
truelight@0: 	if (ttfd->dest_coords == 0)
truelight@0: 		return false;
truelight@0: 
truelight@0: 	// did we reach the final station?
truelight@0: 	if (tile == ttfd->dest_coords ||
truelight@0: 			(IS_TILETYPE(tile, MP_STATION) && IS_BYTE_INSIDE(_map5[tile], 0, 8) && _map2[tile] == ttfd->station_index)) {
truelight@0: 		// found station
truelight@0: 		ttfd->best_bird_dist = 0;
truelight@0: 		if (length < ttfd->best_track_dist) {
truelight@0: 			ttfd->best_track_dist = length;
truelight@0: 			ttfd->best_track = state[1];
truelight@0: 		}
truelight@0: 		return true;
truelight@0: 	} else {
truelight@0: 		uint dist;
truelight@0: 
truelight@0: 		// we've actually found the destination already. no point searching in directions longer than this.
truelight@0: 		if (ttfd->best_track_dist != (uint)-1)
truelight@0: 			return length >= ttfd->best_track_dist;
truelight@0: 		
truelight@0: 		// didn't find station
truelight@0: 		dist = GetTileDist(tile, ttfd->dest_coords);
truelight@0: 		if (dist < ttfd->best_bird_dist) {
truelight@0: 			ttfd->best_bird_dist = dist;
truelight@0: 			ttfd->best_track = state[1];
truelight@0: 		}
truelight@0: 		return false;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void FillWithStationData(TrainTrackFollowerData *fd, Vehicle *v)
truelight@0: {
truelight@0: 	uint tile;
truelight@0: 
truelight@0: 	fd->dest_coords = tile = v->dest_tile;
truelight@0: 	fd->station_index = -1;
truelight@0: 
truelight@0: 	if (IS_TILETYPE(tile, MP_STATION) && IS_BYTE_INSIDE(_map5[tile], 0, 8) )
truelight@0: 		fd->station_index = _map2[tile];
truelight@0: }
truelight@0: 
truelight@0: static const byte _initial_tile_subcoord[6][4][3] = {
truelight@0: {{ 15, 8, 1 },{ 0, 0, 0 },{ 0, 8, 5 },{ 0, 0, 0 }},
truelight@0: {{  0, 0, 0 },{ 8, 0, 3 },{ 0, 0, 0 },{ 8,15, 7 }},
truelight@0: {{  0, 0, 0 },{ 7, 0, 2 },{ 0, 7, 6 },{ 0, 0, 0 }},
truelight@0: {{ 15, 8, 2 },{ 0, 0, 0 },{ 0, 0, 0 },{ 8,15, 6 }},
truelight@0: {{ 15, 7, 0 },{ 8, 0, 4 },{ 0, 0, 0 },{ 0, 0, 0 }},
truelight@0: {{  0, 0, 0 },{ 0, 0, 0 },{ 0, 8, 4 },{ 7,15, 0 }},
truelight@0: };
truelight@0: 
truelight@0: static const uint32 _reachable_tracks[4] = {
truelight@0: 	0x10091009,
truelight@0: 	0x00160016,
truelight@0: 	0x05200520,
truelight@0: 	0x2A002A00,
truelight@0: };
truelight@0: 
truelight@0: static const byte _search_directions[6][4] = {
truelight@0: 	{ 0, 9, 2, 9 }, // track 1
truelight@0: 	{ 9, 1, 9, 3 }, // track 2
truelight@0: 	{ 9, 0, 3, 9 }, // track upper
truelight@0: 	{ 1, 9, 9, 2 }, // track lower
truelight@0: 	{ 3, 2, 9, 9 }, // track left
truelight@0: 	{ 9, 9, 1, 0 }, // track right
truelight@0: };
truelight@0: 
truelight@0: static const byte _pick_track_table[6] = {1, 3, 2, 2, 0, 0};
truelight@0: 
truelight@0: /* choose a track */
truelight@0: static byte ChooseTrainTrack(Vehicle *v, uint tile, int direction, byte trackbits)
truelight@0: {	
truelight@0: 	TrainTrackFollowerData fd;
truelight@0: 	int bits = trackbits;
truelight@0: 	uint best_track;
truelight@0: #if 0
truelight@0: 	int time = rdtsc();
truelight@0: 	static float f;
truelight@0: #endif
truelight@0: 
truelight@0: 	assert( (bits & ~0x3F) == 0);
truelight@0: 
truelight@0: 	/* quick return in case only one possible direction is available */
truelight@0: 	if (KILL_FIRST_BIT(bits) == 0)
truelight@0: 		return FIND_FIRST_BIT(bits);
truelight@0: 
truelight@0: 	FillWithStationData(&fd, v);
truelight@0: 
truelight@0: 	if (_patches.new_pathfinding) {
truelight@0: 		fd.best_bird_dist = (uint)-1;
truelight@0: 		fd.best_track_dist = (uint)-1;
truelight@0: 		fd.best_track = 0xFF;
truelight@0: 		NewTrainPathfind(tile - _tileoffs_by_dir[direction], direction, (TPFEnumProc*)TrainTrackFollower, &fd, NULL);
truelight@0: 
truelight@0: //		printf("Train %d %s\n", v->unitnumber, fd.best_track_dist == -1 ? "NOTFOUND" : "FOUND");
truelight@0: 
truelight@0: 		if (fd.best_track == 0xff) {
truelight@0: 			// blaha
truelight@0: 			best_track = FIND_FIRST_BIT(bits);
truelight@0: 		} else {
truelight@0: 			best_track = fd.best_track & 7;
truelight@0: 		}
truelight@0: 	} else {
truelight@0: 		int i, r;
truelight@0: 		uint best_bird_dist  = 0;
truelight@0: 		uint best_track_dist = 0;
truelight@0: 		byte train_dir = v->direction & 3;
truelight@0: 
truelight@0: 
truelight@0: 		best_track = -1;
truelight@0: 
truelight@0: 		do {
truelight@0: 			i = FIND_FIRST_BIT(bits);
truelight@0: 			bits = KILL_FIRST_BIT(bits);
truelight@0: 
truelight@0: 			fd.best_bird_dist = (uint)-1;
truelight@0: 			fd.best_track_dist = (uint)-1;
truelight@0: 			
truelight@0: 			NewTrainPathfind(tile, _search_directions[i][direction], (TPFEnumProc*)TrainTrackFollower, &fd, NULL);
truelight@0: 			if (best_track != -1) {
truelight@0: 				if (best_track_dist == -1) {
truelight@0: 					if (fd.best_track_dist == -1) {
truelight@0: 						/* neither reached the destination, pick the one with the smallest bird dist */
truelight@0: 						if (fd.best_bird_dist > best_bird_dist) goto bad;
truelight@0: 						if (fd.best_bird_dist < best_bird_dist) goto good;
truelight@0: 					} else {
truelight@0: 						/* we found the destination for the first time */
truelight@0: 						goto good;		
truelight@0: 					}
truelight@0: 				} else {
truelight@0: 					if (fd.best_track_dist == -1) {
truelight@0: 						/* didn't find destination, but we've found the destination previously */
truelight@0: 						goto bad;
truelight@0: 					} else {
truelight@0: 						/* both old & new reached the destination, compare track length */
truelight@0: 						if (fd.best_track_dist > best_track_dist) goto bad;
truelight@0: 						if (fd.best_track_dist < best_track_dist) goto good;
truelight@0: 					}
truelight@0: 				}
truelight@0: 				
truelight@0: 				/* if we reach this position, there's two paths of equal value so far. 
truelight@0: 				 * pick one randomly. */
truelight@0: 				r = (byte)Random();
truelight@0: 				if (_pick_track_table[i] == train_dir) r += 80;
truelight@0: 				if (_pick_track_table[best_track] == train_dir) r -= 80;
truelight@0: 		
truelight@0: 				if (r <= 127) goto bad;
truelight@0: 			}
truelight@0: 	good:;
truelight@0: 			best_track = i;
truelight@0: 			best_bird_dist = fd.best_bird_dist;
truelight@0: 			best_track_dist = fd.best_track_dist;
truelight@0: 	bad:;
truelight@0: 		} while (bits != 0);
truelight@0: //		printf("Train %d %s\n", v->unitnumber, best_track_dist == -1 ? "NOTFOUND" : "FOUND");
truelight@0: 		assert(best_track != -1);
truelight@0: 	}
truelight@0: 
truelight@0: #if 0
truelight@0: 	time = rdtsc() - time;
truelight@0: 	f = f * 0.99 + 0.01 * time;
truelight@0: 	printf("PF time = %d %f\n", time, f);
truelight@0: #endif
truelight@0: 
truelight@0: 	return best_track;
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static bool CheckReverseTrain(Vehicle *v)
truelight@0: {
truelight@0: 	TrainTrackFollowerData fd;
truelight@0: 	int i, r;
truelight@0: 	int best_track;
truelight@0: 	uint best_bird_dist  = 0;
truelight@0: 	uint best_track_dist = 0;
truelight@0: 	uint reverse, reverse_best;
truelight@0: 
truelight@0: 	if (_opt.diff.line_reverse_mode != 0 ||
truelight@0: 			v->u.rail.track & 0xC0 ||
truelight@0: 			!(v->direction & 1))
truelight@0: 		return false;
truelight@0: 
truelight@0: 	FillWithStationData(&fd, v);
truelight@0: 
truelight@0: 	best_track = -1;
truelight@0: 	reverse_best = reverse = 0;
truelight@0: 
truelight@0: 	assert(v->u.rail.track);
truelight@0: 
truelight@0: 	i = _search_directions[FIND_FIRST_BIT(v->u.rail.track)][v->direction>>1];
truelight@0: 
truelight@0: 	while(true) {
truelight@0: 		fd.best_bird_dist = (uint)-1;
truelight@0: 		fd.best_track_dist = (uint)-1;
truelight@0: 
truelight@0: 		NewTrainPathfind(v->tile, reverse ^ i, (TPFEnumProc*)TrainTrackFollower, &fd, NULL);
truelight@0: 
truelight@0: 		if (best_track != -1) {
truelight@0: 			if (best_bird_dist != 0) {
truelight@0: 				if (fd.best_bird_dist != 0) {
truelight@0: 					/* neither reached the destination, pick the one with the smallest bird dist */
truelight@0: 					if (fd.best_bird_dist > best_bird_dist) goto bad;
truelight@0: 					if (fd.best_bird_dist < best_bird_dist) goto good;
truelight@0: 				} else {
truelight@0: 					/* we found the destination for the first time */
truelight@0: 					goto good;		
truelight@0: 				}
truelight@0: 			} else {
truelight@0: 				if (fd.best_bird_dist != 0) {
truelight@0: 					/* didn't find destination, but we've found the destination previously */
truelight@0: 					goto bad;
truelight@0: 				} else {
truelight@0: 					/* both old & new reached the destination, compare track length */
truelight@0: 					if (fd.best_track_dist > best_track_dist) goto bad;
truelight@0: 					if (fd.best_track_dist < best_track_dist) goto good;
truelight@0: 				}
truelight@0: 			}
truelight@0: 			
truelight@0: 			/* if we reach this position, there's two paths of equal value so far. 
truelight@0: 			 * pick one randomly. */
truelight@0: 			r = (byte)Random();
truelight@0: 			if (_pick_track_table[i] == (v->direction & 3)) r += 80;
truelight@0: 			if (_pick_track_table[best_track] == (v->direction & 3)) r -= 80;
truelight@0: 			if (r <= 127) goto bad;
truelight@0: 		}
truelight@0: good:;
truelight@0: 		best_track = i;
truelight@0: 		best_bird_dist = fd.best_bird_dist;
truelight@0: 		best_track_dist = fd.best_track_dist;
truelight@0: 		reverse_best = reverse;
truelight@0: bad:;
truelight@0: 		if (reverse != 0)
truelight@0: 			break;
truelight@0: 		reverse = 2;
truelight@0: 	}
truelight@0: 
truelight@0: 	return reverse_best != 0;
truelight@0: }
truelight@0: 
truelight@0: static bool ProcessTrainOrder(Vehicle *v)
truelight@0: {
truelight@0: 	uint order;
truelight@0: 	bool result;
truelight@0: 
truelight@0: 	// These are un-interruptible
truelight@0: 	if ((v->next_order & OT_MASK) >= OT_GOTO_DEPOT && (v->next_order & OT_MASK) <= OT_LEAVESTATION) {
truelight@0: 		
truelight@0: 		// Let a depot order in the schedule interrupt.
truelight@0: 		if ((v->next_order & (OT_MASK|OF_UNLOAD)) != (OT_GOTO_DEPOT|OF_UNLOAD))
truelight@0: 			return false;
truelight@0: 	}
truelight@0: 
truelight@0: 	if ((v->next_order & (OT_MASK|OF_UNLOAD|OF_FULL_LOAD)) == (OT_GOTO_DEPOT|OF_UNLOAD|OF_FULL_LOAD) &&
truelight@0: 		v->date_of_last_service+v->service_interval > _date) {
truelight@0: 		v->cur_order_index++;
truelight@0: 	}
truelight@0: 
truelight@0: 	// check if we've reached the checkpoint?
truelight@0: 	if ((v->next_order & OT_MASK) == OT_GOTO_CHECKPOINT && v->tile == v->dest_tile) {
truelight@0: 		v->cur_order_index++;
truelight@0: 	}
truelight@0: 
truelight@0: 	// check if we've reached a non-stop station while TTDPatch nonstop is enabled.. 
truelight@0: 	if (_patches.new_nonstop && (v->next_order & OF_NON_STOP) && v->next_order_param == _map2[v->tile]) { 
truelight@0: 		v->cur_order_index++; 
truelight@0: 	}
truelight@0: 
truelight@0: 	// Get the current order
truelight@0: 	if (v->cur_order_index >= v->num_orders)
truelight@0: 		v->cur_order_index = 0;
truelight@0: 	order = v->schedule_ptr[v->cur_order_index];
truelight@0: 
truelight@0: 	// If no order, do nothing.
truelight@0: 	if (order == 0) {
truelight@0: 		v->next_order = OT_NOTHING;
truelight@0: 		v->dest_tile = 0;
truelight@0: 		return false;
truelight@0: 	}
truelight@0: 
truelight@0: 	// If it is unchanged, keep it.
truelight@0: 	if (order == (uint)((v->next_order | (v->next_order_param<<8))))
truelight@0: 		return false;
truelight@0: 
truelight@0: 	// Otherwise set it, and determine the destination tile.
truelight@0: 	v->next_order = (byte)order;
truelight@0: 	v->next_order_param = (byte)(order >> 8);
truelight@0: 
truelight@0: 	v->dest_tile = 0;
truelight@0: 
truelight@0: 	result = false;
truelight@0: 	if ((order & OT_MASK) == OT_GOTO_STATION) {
truelight@0: 		if ( (byte)(order >> 8) == v->last_station_visited)
truelight@0: 			v->last_station_visited = 0xFF;
truelight@0: 		v->dest_tile = DEREF_STATION(order >> 8)->xy;
truelight@0: 		result = CheckReverseTrain(v);
truelight@0: 	} else if ((order & OT_MASK) == OT_GOTO_DEPOT) {
truelight@0: 		v->dest_tile = _depots[order >> 8].xy;
truelight@0: 		result = CheckReverseTrain(v);
truelight@0: 	} else if ((order & OT_MASK) == OT_GOTO_CHECKPOINT) {
truelight@0: 		v->dest_tile = _checkpoints[order >> 8].xy;
truelight@0: 		result = CheckReverseTrain(v);
truelight@0: 	}
truelight@0: 
truelight@0: 	InvalidateVehicleOrderWidget(v);
truelight@0: 
truelight@0: 	return result;
truelight@0: }
truelight@0: 
truelight@0: static void MarkTrainDirty(Vehicle *v)
truelight@0: {
truelight@0: 	do {
truelight@0: 		v->cur_image = GetTrainImage(v, v->direction);
truelight@0: 		MarkAllViewportsDirty(v->left_coord, v->top_coord, v->right_coord + 1, v->bottom_coord + 1);
truelight@0: 	} while ( (v=v->next) != NULL);
truelight@0: }
truelight@0: 
truelight@0: static void HandleTrainLoading(Vehicle *v, bool mode)
truelight@0: {
truelight@0: 	if (v->next_order == OT_NOTHING)
truelight@0: 		return;
truelight@0: 	
truelight@0: 	if (v->next_order != OT_DUMMY) {
truelight@0: 		if ((v->next_order&OT_MASK) != OT_LOADING)
truelight@0: 			return;
truelight@0: 
truelight@0: 		if (mode)
truelight@0: 			return;
truelight@0: 
truelight@0: 		// don't mark the train as lost if we're loading on the final station.
truelight@0: 		if (v->next_order & OF_NON_STOP)
truelight@0: 			v->u.rail.days_since_order_progr = 0;
truelight@0: 
truelight@0: 		if (--v->load_unload_time_rem)
truelight@0: 			return;
truelight@0: 
truelight@0: 		if (v->next_order&OF_FULL_LOAD && CanFillVehicle(v)) {
truelight@0: 			SET_EXPENSES_TYPE(EXPENSES_TRAIN_INC);
truelight@0: 			if (LoadUnloadVehicle(v)) {
truelight@0: 				InvalidateWindow(WC_TRAINS_LIST, v->owner);
truelight@0: 				MarkTrainDirty(v);
truelight@0: 				
truelight@0: 				// need to update acceleration since the goods on the train changed.
truelight@0: 				UpdateTrainAcceleration(v);
truelight@0: 			}
truelight@0: 			return;
truelight@0: 		}
truelight@0: 		
truelight@0: 		TrainPlayLeaveStationSound(v);
truelight@0: 		
truelight@0: 		{
truelight@0: 			byte b = v->next_order;
truelight@0: 			v->next_order = OT_LEAVESTATION;
truelight@0: 			
truelight@0: 			// If this was not the final order, don't remove it from the list.
truelight@0: 			if (!(b & OF_NON_STOP))
truelight@0: 				return;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	v->u.rail.days_since_order_progr = 0;
truelight@0: 	v->cur_order_index++;
truelight@0: 	InvalidateVehicleOrderWidget(v);
truelight@0: }
truelight@0: 
truelight@0: static int UpdateTrainSpeed(Vehicle *v)
truelight@0: {
truelight@0: 	uint spd;
truelight@0: 	uint accel;
truelight@0: 
truelight@0: 	if (v->vehstatus & VS_STOPPED || v->u.rail.flags & VRF_REVERSING) {
truelight@0: 		accel = -v->acceleration * 2;
truelight@0: 	} else {
truelight@0: 		accel = v->acceleration;
truelight@0: 		if (_patches.realistic_acceleration) {
truelight@0: 			accel = GetRealisticAcceleration(v);
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	spd = v->subspeed + accel * 2;
truelight@0: 	v->subspeed = (byte)spd;
truelight@0: 	v->cur_speed = spd = clamp(v->cur_speed + ((int)spd >> 8), 0, v->max_speed);
truelight@0: 
truelight@0: 	if (!(v->direction & 1)) spd = spd * 3 >> 2;
truelight@0: 
truelight@0: 	spd += v->progress;
truelight@0: 	v->progress = (byte)spd;
truelight@0: 	return (spd >> 8);
truelight@0: }
truelight@0: 
truelight@0: static void TrainEnterStation(Vehicle *v, int station)
truelight@0: {
truelight@0: 	Station *st;
truelight@0: 	uint32 flags;
truelight@0: 
truelight@0: 	v->last_station_visited = station;
truelight@0: 
truelight@0: 	/* check if a train ever visited this station before */
truelight@0: 	st = DEREF_STATION(station);
truelight@0: 	if (!(st->had_vehicle_of_type & HVOT_TRAIN)) {
truelight@0: 		st->had_vehicle_of_type |= HVOT_TRAIN;
truelight@0: 		SET_DPARAM16(0, st->index);
truelight@0: 		flags = (v->owner == _local_player) ? NEWS_FLAGS(NM_THIN, NF_VIEWPORT|NF_VEHICLE, NT_ARRIVAL_PLAYER, 0) : NEWS_FLAGS(NM_THIN, NF_VIEWPORT|NF_VEHICLE, NT_ARRIVAL_OTHER, 0);
truelight@0: 		AddNewsItem(
truelight@0: 			STR_8801_CITIZENS_CELEBRATE_FIRST,
truelight@0: 			flags,
truelight@0: 			v->index,
truelight@0: 			0);
truelight@0: 	}
truelight@0: 
truelight@0: 	// Did we reach the final destination?
truelight@0: 	if ((v->next_order&OT_MASK) == OT_GOTO_STATION && v->next_order_param == (byte)station) {
truelight@0: 		// Yeah, keep the load/unload flags
truelight@0: 		// Non Stop now means if the order should be increased.
truelight@0: 		v->next_order = (v->next_order & (OF_FULL_LOAD|OF_UNLOAD)) | OF_NON_STOP | OT_LOADING;
truelight@0: 	} else {
truelight@0: 		// No, just do a simple load
truelight@0: 		v->next_order = OT_LOADING;
truelight@0: 	}
truelight@0: 	v->next_order_param = 0;
truelight@0: 
truelight@0: 	SET_EXPENSES_TYPE(EXPENSES_TRAIN_INC);
truelight@0: 	if (LoadUnloadVehicle(v) != 0) {
truelight@0: 		InvalidateWindow(WC_TRAINS_LIST, v->owner);
truelight@0: 		MarkTrainDirty(v);
truelight@0: 		UpdateTrainAcceleration(v);
truelight@0: 	}
truelight@0: 	InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
truelight@0: }
truelight@0: 
truelight@0: static byte AfterSetTrainPos(Vehicle *v)
truelight@0: {
truelight@0: 	byte new_z, old_z;
truelight@0: 	
truelight@0: 	// need this hint so it returns the right z coordinate on bridges.
truelight@0: 	_get_z_hint = v->z_pos;
truelight@0: 	new_z = GetSlopeZ(v->x_pos, v->y_pos);
truelight@0: 	_get_z_hint = 0;
truelight@0: 
truelight@0: 	old_z = v->z_pos;
truelight@0: 	v->z_pos = new_z;
truelight@0: 
truelight@0: 	v->u.rail.flags &= ~(VRF_GOINGUP | VRF_GOINGDOWN);
truelight@0: 
truelight@0: 	if (new_z != old_z) {
truelight@0: 		v->u.rail.flags |= (new_z > old_z) ? VRF_GOINGUP : VRF_GOINGDOWN;
truelight@0: 	}
truelight@0: 
truelight@0: 	VehiclePositionChanged(v);
truelight@0: 	EndVehicleMove(v);
truelight@0: 	return old_z;
truelight@0: }
truelight@0: 
truelight@0: static const byte _new_vehicle_direction_table[11] = {
truelight@0: 	0, 7, 6, 0,
truelight@0: 	1, 0, 5, 0,
truelight@0: 	2, 3, 4,
truelight@0: };
truelight@0: 
truelight@0: static int GetNewVehicleDirectionByTile(uint new_tile, uint old_tile)
truelight@0: {
truelight@0: 	uint offs = (GET_TILE_Y(new_tile) - GET_TILE_Y(old_tile) + 1) * 4 + 
truelight@0: 							GET_TILE_X(new_tile) - GET_TILE_X(old_tile) + 1;
truelight@0: 	assert(offs < 11);
truelight@0: 	return _new_vehicle_direction_table[offs];
truelight@0: }
truelight@0: 
truelight@0: static int GetNewVehicleDirection(Vehicle *v, int x, int y)
truelight@0: {
truelight@0: 	uint offs = (y - v->y_pos + 1) * 4 + (x - v->x_pos + 1);
truelight@0: 	assert(offs < 11);
truelight@0: 	return _new_vehicle_direction_table[offs];
truelight@0: }
truelight@0: 
truelight@0: static int GetDirectionToVehicle(Vehicle *v, int x, int y)
truelight@0: {
truelight@0: 	byte offs;
truelight@0: 
truelight@0: 	x -= v->x_pos;
truelight@0: 	if (x >= 0) {
truelight@0: 		offs = (x > 2) ? 0 : 1;
truelight@0: 	} else {
truelight@0: 		offs = (x < -2) ? 2 : 1;
truelight@0: 	}
truelight@0: 
truelight@0: 	y -= v->y_pos;
truelight@0: 	if (y >= 0) {
truelight@0: 		offs += ((y > 2) ? 0 : 1) * 4;
truelight@0: 	} else {
truelight@0: 		offs += ((y < -2) ? 2 : 1) * 4;
truelight@0: 	}
truelight@0: 
truelight@0: 	assert(offs < 11);
truelight@0: 	return _new_vehicle_direction_table[offs];
truelight@0: }
truelight@0: 
truelight@0: /* Check if the vehicle is compatible with the specified tile */
truelight@0: static bool CheckCompatibleRail(Vehicle *v, uint tile)
truelight@0: {
truelight@0: 	if (IS_TILETYPE(tile, MP_RAILWAY) ||
truelight@0: 			IS_TILETYPE(tile, MP_STATION)) {
truelight@0: 
truelight@0: 	} else if (IS_TILETYPE(tile, MP_TUNNELBRIDGE)) {
truelight@0: 		if ((_map5[tile] & 0xC0) == 0xC0) {// is bridge middle part?
truelight@0: 			TileInfo ti;
truelight@0: 			FindLandscapeHeightByTile(&ti, tile);
truelight@0: 
truelight@0: 			// correct Z position of a train going under a bridge on slopes
truelight@0: 			if (CORRECT_Z(ti.tileh))
truelight@0: 				ti.z += 8;
truelight@0: 			
truelight@0: 			if(v->z_pos != ti.z) // train is going over bridge
truelight@0: 				return true;
truelight@0: 		}
truelight@0: 	} else
truelight@0: 		return true;
truelight@0: 
truelight@0: 	if (_map_owner[tile] != v->owner ||
truelight@0: 			(v->subtype == 0 && (_map3_lo[tile] & 0xF) != v->u.rail.railtype))
truelight@0: 		return false;
truelight@0: 	
truelight@0: 	return true;
truelight@0: }
truelight@0: 
truelight@0: typedef struct {
truelight@0: 	byte small_turn, large_turn;
truelight@0: 	byte z_up; // fraction to remove when moving up
truelight@0: 	byte z_down; // fraction to remove when moving down
truelight@0: } RailtypeSlowdownParams;
truelight@0: 
truelight@0: static const RailtypeSlowdownParams _railtype_slowdown[3] = {
truelight@0: 	// normal accel
truelight@0: 	{256/4, 256/2, 256/4, 2}, // normal
truelight@0: 	{256/4, 256/2, 256/4, 2}, // monorail
truelight@0: 	{0,     256/2, 256/4, 2}, // maglev
truelight@0: };
truelight@0: 
truelight@0: /* Modify the speed of the vehicle due to a turn */
truelight@0: static void AffectSpeedByDirChange(Vehicle *v, byte new_dir)
truelight@0: {
truelight@0: 	byte diff;
truelight@0: 	const RailtypeSlowdownParams *rsp;
truelight@0: 
truelight@0: 	if (_patches.realistic_acceleration || (diff = (v->direction - new_dir) & 7) == 0)
truelight@0: 		return;
truelight@0: 
truelight@0: 	rsp = &_railtype_slowdown[v->u.rail.railtype];
truelight@0: 	v->cur_speed -= ((diff == 1 || diff == 7) ? rsp->small_turn : rsp->large_turn) * v->cur_speed >> 8;
truelight@0: }
truelight@0: 
truelight@0: /* Modify the speed of the vehicle due to a change in altitude */
truelight@0: static void AffectSpeedByZChange(Vehicle *v, byte old_z)
truelight@0: {
truelight@0: 	const RailtypeSlowdownParams *rsp;
truelight@0: 	if (old_z == v->z_pos || _patches.realistic_acceleration)
truelight@0: 		return;
truelight@0: 
truelight@0: 	rsp = &_railtype_slowdown[v->u.rail.railtype];
truelight@0: 
truelight@0: 	if (old_z < v->z_pos) {
truelight@0: 		v->cur_speed -= (v->cur_speed * rsp->z_up >> 8);
truelight@0: 	} else {
truelight@0: 		uint16 spd = v->cur_speed + rsp->z_down;
truelight@0: 		if (spd <= v->max_speed)
truelight@0: 			v->cur_speed = spd;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static const byte _otherside_signal_directions[14] = {
truelight@0: 	1, 3, 1, 3, 5, 3, 0, 0,
truelight@0: 	5, 7, 7, 5, 7, 1,
truelight@0: };
truelight@0: 
truelight@0: static void TrainMovedChangeSignals(uint tile, int dir)
truelight@0: {
truelight@0: 	int i;
truelight@0: 	if (IS_TILETYPE(tile, MP_RAILWAY) && (_map5[tile]&0xC0)==0x40) {
truelight@0: 		i = FindFirstBit2x64((_map5[tile]+(_map5[tile]<<8)) & _reachable_tracks[dir]);
truelight@0: 		UpdateSignalsOnSegment(tile, _otherside_signal_directions[i]);
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: typedef struct TrainCollideChecker {
truelight@0: 	Vehicle *v, *v_skip;
truelight@0: 
truelight@0: } TrainCollideChecker;
truelight@0: 
truelight@0: void *FindTrainCollideEnum(Vehicle *v, TrainCollideChecker *tcc)
truelight@0: {
truelight@0: 	if (v == tcc->v || v == tcc->v_skip || v->type != VEH_Train || v->u.rail.track==0x80)
truelight@0: 		return 0;
truelight@0: 
truelight@0: 	if ( myabs(v->z_pos - tcc->v->z_pos) > 6 ||
truelight@0: 			 myabs(v->x_pos - tcc->v->x_pos) >= 6 ||
truelight@0: 			 myabs(v->y_pos - tcc->v->y_pos) >= 6)
truelight@0: 				return NULL;
truelight@0: 	return v;
truelight@0: }
truelight@0: 
truelight@0: static void SetVehicleCrashed(Vehicle *v)
truelight@0: {
truelight@0: 	Vehicle *u;
truelight@0: 
truelight@0: 	if (v->u.rail.crash_anim_pos != 0)
truelight@0: 		return;
truelight@0: 
truelight@0: 	v->u.rail.crash_anim_pos++;
truelight@0: 	
truelight@0: 	u = v;
truelight@0: 	BEGIN_ENUM_WAGONS(v)
truelight@0: 		v->vehstatus |= VS_CRASHED;
truelight@0: 	END_ENUM_WAGONS(v)
truelight@0: 
truelight@0: 	InvalidateWindowWidget(WC_VEHICLE_VIEW, u->index, 4);
truelight@0: }
truelight@0: 
truelight@0: static int CountPassengersInTrain(Vehicle *v)
truelight@0: {
truelight@0: 	int num = 0;	
truelight@0: 	BEGIN_ENUM_WAGONS(v)
truelight@0: 		if (v->cargo_type == 0) num += v->cargo_count;
truelight@0: 	END_ENUM_WAGONS(v)
truelight@0: 	return num;
truelight@0: }
truelight@0: 
darkvater@22: /*
darkvater@22:  * Checks whether the specified tried has a collision with another vehicle. If
darkvater@22:  * so, destroys this vehicle, and the other vehicle if its subtype is 0 (?).
darkvater@22:  * Reports the incident in a flashy news item, modifies station ratings and
darkvater@22:  * plays a sound.
darkvater@22:  */
truelight@0: static void CheckTrainCollision(Vehicle *v)
truelight@0: {
truelight@0: 	TrainCollideChecker tcc;
truelight@0: 	Vehicle *coll;
truelight@0: 	int num;
truelight@0: 
truelight@0: 	/* can't collide in depot */
truelight@0: 	if (v->u.rail.track == 0x80)
truelight@0: 		return;
truelight@0: 	
truelight@0: 	assert((uint)TILE_FROM_XY(v->x_pos, v->y_pos) == v->tile);
truelight@0: 
truelight@0: 	tcc.v = v;
truelight@0: 	tcc.v_skip = v->next;
truelight@0: 
truelight@0: 	/* find colliding vehicle */
truelight@0: 	coll = VehicleFromPos(v->tile, &tcc, (VehicleFromPosProc*)FindTrainCollideEnum);
truelight@0: 	if (coll == NULL)
truelight@0: 		return;
truelight@0: 	
truelight@0: 	coll = GetFirstVehicleInChain(coll);
truelight@0: 	
truelight@0: 	/* it can't collide with its own wagons */
truelight@0: 	if (v == coll)
truelight@0: 		return;
truelight@0: 
truelight@0: 	//two drivers + passangers killed in train v 
truelight@0: 	num = 2 + CountPassengersInTrain(v);
truelight@0: 	if(!(coll->vehstatus&VS_CRASHED)) 
truelight@0: 		//two drivers + passangers killed in train coll (if it was not crashed already)
truelight@0: 		num += 2 + CountPassengersInTrain(coll);
truelight@0: 
truelight@0: 	SetVehicleCrashed(v);
truelight@0: 	if (coll->subtype == 0)
truelight@0: 		SetVehicleCrashed(coll);
truelight@0: 
truelight@0: 	
truelight@0: 	SET_DPARAM16(0, num);
truelight@0: 	
truelight@0: 	AddNewsItem(STR_8868_TRAIN_CRASH_DIE_IN_FIREBALL,
truelight@0: 		NEWS_FLAGS(NM_THIN, NF_VIEWPORT|NF_VEHICLE, NT_ACCIDENT, 0),
truelight@0: 		v->index,
truelight@0: 		0);
truelight@0: 
truelight@0: 	ModifyStationRatingAround(v->tile, v->owner, -160, 30);
truelight@0: 	SndPlayVehicleFx(17, v);
truelight@0: }
truelight@0: 
truelight@0: static void *CheckVehicleAtSignal(Vehicle *v, void *data)
truelight@0: {
truelight@0: 	uint32 d = (uint32)data;
truelight@0: 
truelight@0: 	if (v->type == VEH_Train && v->subtype == 0 && v->tile == (TileIndex)(d >> 8)) {
truelight@0: 		byte diff = (v->direction - (byte)d + 2) & 7;
truelight@0: 		if (diff == 2 || (v->cur_speed <= 5 && diff <= 4))
truelight@0: 			return (void*)1;
truelight@0: 	}
truelight@0: 	return 0;
truelight@0: }
truelight@0: 
truelight@0: static void TrainController(Vehicle *v)
truelight@0: {
truelight@0: 	Vehicle *prev = NULL;
truelight@0: 	GetNewVehiclePosResult gp;
truelight@0: 	uint32 r, tracks,ts;
truelight@0: 	int dir, i;
truelight@0: 	byte chosen_dir;
truelight@0: 	byte chosen_track;
truelight@0: 	byte old_z;
truelight@0: 
darkvater@22: 	/* For every vehicle after and including the given vehicle */
truelight@0: 	for(;;) {
truelight@0: 		BeginVehicleMove(v);
truelight@0: 		
truelight@0: 		if (v->u.rail.track != 0x40) {
darkvater@22: 			/* Not inside tunnel */
truelight@0: 			if (GetNewVehiclePos(v, &gp)) {
darkvater@22: 				/* Staying in the old tile */
truelight@0: 				if (v->u.rail.track == 0x80) {
truelight@0: 					/* inside depot */
truelight@0: 					gp.x = v->x_pos;
truelight@0: 					gp.y = v->y_pos;
truelight@0: 				} else {
darkvater@22: 					/* is not inside depot */
truelight@0: 					r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
truelight@0: 					if (r & 0x8)
truelight@0: 						goto invalid_rail;
truelight@0: 					if (r & 0x2) {
truelight@0: 						TrainEnterStation(v, r >> 8);
truelight@0: 						return;
truelight@0: 					}
truelight@0: 
truelight@0: 					if (v->next_order == OT_LEAVESTATION) {
truelight@0: 						v->next_order = OT_NOTHING;
truelight@0: 						InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
truelight@0: 					}
truelight@0: 				}
truelight@0: 			} else {
truelight@0: 				/* A new tile is about to be entered. */
truelight@0: 
truelight@0: 				/* Determine what direction we're entering the new tile from */
truelight@0: 				dir = GetNewVehicleDirectionByTile(gp.new_tile, gp.old_tile);
truelight@0: 				assert(dir==1 || dir==3 || dir==5 || dir==7);
truelight@0: 				
truelight@0: 				/* Get the status of the tracks in the new tile and mask
truelight@0: 				 * away the bits that aren't reachable. */
truelight@0: 				ts = GetTileTrackStatus(gp.new_tile, 0) & _reachable_tracks[dir >> 1];
truelight@0: 
truelight@0: 				/* Combine the from & to directions.
truelight@0: 				 * Now, the lower byte contains the track status, and the byte at bit 16 contains
truelight@0: 				 * the signal status. */
truelight@0: 				tracks = ts|(ts >> 8);
truelight@0: 				if ( (byte) tracks == 0)
truelight@0: 					goto invalid_rail;
truelight@0: 
truelight@0: 				/* Check if the new tile contrains tracks that are compatible
truelight@0: 				 * with the current train, if not, bail out. */
truelight@0: 				if (!CheckCompatibleRail(v, gp.new_tile))
truelight@0: 					goto invalid_rail;
truelight@0: 
truelight@0: 				if (prev == NULL) {
truelight@0: 					/* Currently the locomotive is active. Determine which one of the
truelight@0: 					 * available tracks to choose */
truelight@0: 					chosen_track = 1 << ChooseTrainTrack(v, gp.new_tile, dir>>1, (byte)tracks);
truelight@0: 
truelight@0: 					/* Check if it's a red signal and that force proceed is not clicked. */
truelight@0: 					if ( (tracks>>16)&chosen_track && v->u.rail.force_proceed == 0) goto red_light;
truelight@0: 				} else {
truelight@0: 					static byte _matching_tracks[8] = {0x30, 1, 0xC, 2, 0x30, 1, 0xC, 2};
truelight@0: 					
truelight@0: 					/* The wagon is active, simply follow the prev vehicle. */
truelight@0: 					chosen_track = (byte)(_matching_tracks[GetDirectionToVehicle(prev, gp.x, gp.y)] & tracks);
truelight@0: 				}
truelight@0: 
truelight@0: 				/* make sure chosen track is a valid track */
truelight@0: 				assert(chosen_track==1 || chosen_track==2 || chosen_track==4 || chosen_track==8 || chosen_track==16 || chosen_track==32);
truelight@0: 
truelight@0: 				/* Update XY to reflect the entrance to the new tile, and select the direction to use */
truelight@0: 				{
truelight@0: 					const byte *b = _initial_tile_subcoord[FIND_FIRST_BIT(chosen_track)][dir>>1];
truelight@0: 					gp.x = (gp.x & ~0xF) | b[0];
truelight@0: 					gp.y = (gp.y & ~0xF) | b[1];
truelight@0: 					chosen_dir = b[2];
truelight@0: 				}
truelight@0: 				
truelight@0: 				/* Call the landscape function and tell it that the vehicle entered the tile */
truelight@0: 				r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
truelight@0: 				if (r&0x8)
truelight@0: 					goto invalid_rail;
truelight@0: 
truelight@0: 				if (v->subtype == 0) v->load_unload_time_rem = 0;
truelight@0: 
truelight@0: 				if (!(r&0x4)) {
truelight@0: 					v->tile = gp.new_tile;
truelight@0: 					v->u.rail.track = chosen_track;
truelight@0: 				}
truelight@0: 
truelight@0: 				if (v->subtype == 0)
truelight@0: 					TrainMovedChangeSignals(gp.new_tile, dir>>1);
truelight@0: 
darkvater@22: 				/* Signals can only change when the first
darkvater@22: 				 * (above) or the last vehicle moves. */
truelight@0: 				if (v->next == NULL)
truelight@0: 					TrainMovedChangeSignals(gp.old_tile, (dir>>1) ^ 2);
truelight@0: 				
truelight@0: 				if (prev == NULL) {
truelight@0: 					AffectSpeedByDirChange(v, chosen_dir);
truelight@0: 				}
truelight@0: 
truelight@0: 				v->direction = chosen_dir;
truelight@0: 			}
truelight@0: 		} else {
truelight@0: 			/* in tunnel */
truelight@0: 			GetNewVehiclePos(v, &gp);
truelight@0: 			
truelight@0: 			if (IS_TILETYPE(gp.new_tile, MP_TUNNELBRIDGE) &&
truelight@0: 					!(_map5[gp.new_tile] & 0xF0)) {
truelight@0: 				r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
truelight@0: 				if (r & 0x4) goto common;
truelight@0: 			}
truelight@0: 
truelight@0: 			v->x_pos = gp.x;
truelight@0: 			v->y_pos = gp.y;
truelight@0: 			VehiclePositionChanged(v);
truelight@0: 			goto next_vehicle;
truelight@0: 		}
truelight@0: common:;
truelight@0: 
truelight@0: 		/* update image of train, as well as delta XY */
truelight@0: 		dir = GetNewVehicleDirection(v, gp.x, gp.y);
truelight@0: 		UpdateTrainDeltaXY(v, dir);
truelight@0: 		v->cur_image = GetTrainImage(v, dir);
truelight@0: 
truelight@0: 		v->x_pos = gp.x;
truelight@0: 		v->y_pos = gp.y;
truelight@0: 
truelight@0: 		/* update the Z position of the vehicle */
truelight@0: 		old_z = AfterSetTrainPos(v);
truelight@0: 		
truelight@0: 		if (prev == NULL) {
darkvater@22: 			/* This is the first vehicle in the train */
truelight@0: 			AffectSpeedByZChange(v, old_z);
truelight@0: 			CheckTrainCollision(v);
truelight@0: 		}
truelight@0: 
darkvater@22: next_vehicle:;
truelight@0: 		/* continue with next vehicle */
truelight@0: 		prev = v;
truelight@0: 		if ((v=v->next) == NULL)
truelight@0: 			return;
truelight@0: 	}
truelight@0: 
truelight@0: invalid_rail:
darkvater@22: 	/* We've reached end of line?? */
truelight@0: 	if (prev != NULL) {
truelight@0: 		error("!Disconnecting train");
truelight@0: 	}
truelight@0: 	goto reverse_train_direction;
truelight@0: 
truelight@0: red_light: {
darkvater@22: 	/* We're in front of a red signal ?? */
truelight@0: 		/* find the first set bit in ts. need to do it in 2 steps, since
truelight@0: 		 * FIND_FIRST_BIT only handles 6 bits at a time. */
truelight@0: 		i = FindFirstBit2x64(ts);
truelight@0: 		
truelight@0: 		if (!(_map3_lo[gp.new_tile] & _signal_otherdir[i])) {
truelight@0: 			v->cur_speed = 0;
truelight@0: 			v->subspeed = 0;
truelight@0: 			v->progress = 255-100;
truelight@0: 			if (++v->load_unload_time_rem < _patches.wait_oneway_signal * 20)
truelight@0: 				return;
truelight@0: 		} else if (_map3_lo[gp.new_tile] & _signal_onedir[i]){
truelight@0: 			v->cur_speed = 0;
truelight@0: 			v->subspeed = 0;
truelight@0: 			v->progress = 255-10;
truelight@0: 			if (++v->load_unload_time_rem < _patches.wait_twoway_signal * 73) {
truelight@0: 				uint o_tile = gp.new_tile + _tileoffs_by_dir[dir>>1];
truelight@0: 				/* check if a train is waiting on the other side */
truelight@0: 				if (VehicleFromPos(o_tile, (void*)( (o_tile<<8) | (dir^4)), (VehicleFromPosProc*)CheckVehicleAtSignal) == NULL)
truelight@0: 					return;
truelight@0: 			}
truelight@0: 		}
truelight@0: 	}
truelight@0: 		
truelight@0: reverse_train_direction:
truelight@0: 	v->load_unload_time_rem = 0;
truelight@0: 	v->cur_speed = 0;
truelight@0: 	v->subspeed = 0;
truelight@0: 	ReverseTrainDirection(v);
truelight@0: 
truelight@0: }
truelight@0: 
truelight@0: static void DeleteLastWagon(Vehicle *v)
truelight@0: {
truelight@0: 	Vehicle *u = v;
truelight@0: 	int t;
truelight@0: 
truelight@0: 	while (v->next != NULL) {
truelight@0: 		u = v;
truelight@0: 		v = v->next;
truelight@0: 	}
truelight@0: 	u->next = NULL;
truelight@0: 
truelight@0: 	InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
truelight@0: 	DeleteWindowById(WC_VEHICLE_VIEW, v->index);
truelight@0: 	InvalidateWindow(WC_TRAINS_LIST, v->owner);
truelight@0: 	InvalidateWindow(WC_COMPANY, v->owner);
truelight@0: 
truelight@0: 	BeginVehicleMove(v);
truelight@0: 	EndVehicleMove(v);
truelight@0: 	DeleteVehicle(v);
truelight@0: 
truelight@0: 	if (!((t=v->u.rail.track) & 0xC0)) {
truelight@0: 		SetSignalsOnBothDir(v->tile, FIND_FIRST_BIT(t));
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void ChangeTrainDirRandomly(Vehicle *v)
truelight@0: {
truelight@0: 	static int8 _random_dir_change[4] = { -1, 0, 0, 1};
truelight@0: 	
truelight@0: 	do {
truelight@0: 		v->direction = (v->direction + _random_dir_change[Random()&3]) & 7;
truelight@0: 		if (!(v->vehstatus & VS_HIDDEN)) {
truelight@0: 			BeginVehicleMove(v);
truelight@0: 			UpdateTrainDeltaXY(v, v->direction);
truelight@0: 			v->cur_image = GetTrainImage(v, v->direction);
truelight@0: 			AfterSetTrainPos(v);
truelight@0: 		}
truelight@0: 	} while ( (v=v->next) != NULL);
truelight@0: }
truelight@0: 
truelight@0: static void HandleCrashedTrain(Vehicle *v)
truelight@0: {
truelight@0: 	int state = ++v->u.rail.crash_anim_pos, index;
truelight@0: 	uint32 r;
truelight@0: 	Vehicle *u;
truelight@0: 	
truelight@0: 	if (state == 4) {
truelight@0: 		CreateEffectVehicleRel(v, 4, 4, 8, EV_CRASHED_SMOKE);
truelight@0: 	}
truelight@0: 
truelight@0: 	if (state <= 200 && (uint16)(r=Random()) <= 0x2492) {
truelight@0: 		index = (r * 10 >> 16);
truelight@0: 
truelight@0: 		u = v;
truelight@0: 		do {
truelight@0: 			if (--index < 0) {
truelight@0: 				r = Random();
truelight@0: 
truelight@0: 				CreateEffectVehicleRel(u,
truelight@0: 					2 + ((r>>8)&7),
truelight@0: 					2 + ((r>>16)&7),
truelight@0: 					5 + (r&7),
truelight@0: 					EV_DEMOLISH);
truelight@0: 				break;
truelight@0: 			}
truelight@0: 		} while ( (u=u->next) != NULL);
truelight@0: 	}
truelight@0: 
truelight@0: 	if (state <= 240 && !(v->tick_counter&3)) {
truelight@0: 		ChangeTrainDirRandomly(v);
truelight@0: 	}
truelight@0: 
truelight@0: 	if (state >= 4440 && !(v->tick_counter&0x1F))
truelight@0: 		DeleteLastWagon(v);
truelight@0: }
truelight@0: 
truelight@0: static void HandleBrokenTrain(Vehicle *v)
truelight@0: {
truelight@0: 	if (v->breakdown_ctr != 1) {
truelight@0: 		v->breakdown_ctr = 1;
truelight@0: 		v->cur_speed = 0;
truelight@0: 
truelight@0: 		if (v->breakdowns_since_last_service != 255)
truelight@0: 			v->breakdowns_since_last_service++;
truelight@0: 		
truelight@0: 		InvalidateWindow(WC_VEHICLE_VIEW, v->index);
truelight@0: 		InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
truelight@0: 		
truelight@0: 		SndPlayVehicleFx((_opt.landscape != LT_CANDY) ? 0xE : 0x3A, v);
truelight@0: 
truelight@0: 		if (!(v->vehstatus & VS_HIDDEN)) {
truelight@0: 			Vehicle *u = CreateEffectVehicleRel(v, 4, 4, 5, EV_BREAKDOWN_SMOKE);
truelight@0: 			if (u)
truelight@0: 				u->u.special.unk0 = v->breakdown_delay * 2;
truelight@0: 		}
truelight@0: 	}
truelight@0: 
truelight@0: 	if (!(v->tick_counter & 3)) {
truelight@0: 		if (!--v->breakdown_delay) {
truelight@0: 			v->breakdown_ctr = 0;
truelight@0: 			InvalidateWindow(WC_VEHICLE_VIEW, v->index);
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static const byte _breakdown_speeds[16] = {
truelight@0: 	225, 210, 195, 180, 165, 150, 135, 120, 105, 90, 75, 60, 45, 30, 15, 15
truelight@0: };
truelight@0: 
truelight@0: static void TrainCheckIfLineEnds(Vehicle *v)
truelight@0: {
truelight@0: 	uint tile;
truelight@0: 	uint x,y;
truelight@0: 	int t;
truelight@0: 	uint32 ts;
truelight@0: 
truelight@0: 	if ((uint)(t=v->breakdown_ctr) > 1) {
truelight@0: 		v->vehstatus |= VS_TRAIN_SLOWING;
truelight@0: 		
truelight@0: 		t = _breakdown_speeds[ ((~t) >> 4) & 0xF];
truelight@0: 		if ((uint16)t <= v->cur_speed)
truelight@0: 			v->cur_speed = t;
truelight@0: 	} else {
truelight@0: 		v->vehstatus &= ~VS_TRAIN_SLOWING;
truelight@0: 	}
truelight@0: 
truelight@0: 	// exit if inside a tunnel
truelight@0: 	if (v->u.rail.track & 0x40)
truelight@0: 		return;
truelight@0: 
truelight@0: 	tile = v->tile;
truelight@0: 
truelight@0: 	// tunnel entrance?
truelight@0: 	if (IS_TILETYPE(tile, MP_TUNNELBRIDGE) &&
truelight@0: 			(_map5[tile] & 0xF0) == 0 && (byte)((_map5[tile] & 3)*2+1) == v->direction)
truelight@0: 				return;
truelight@0: 	
truelight@0: 	// depot?
truelight@0: 	if (IS_TILETYPE(tile, MP_RAILWAY) && (_map5[tile] & 0xFC) == 0xC0)
truelight@0: 		return;
truelight@0: 
darkvater@22: 	/* Determine the non-diagonal direction in which we will exit this tile */
truelight@0: 	t = v->direction >> 1;
truelight@0: 	if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[t]) {
truelight@0: 		t = (t - 1) & 3;
truelight@0: 	}
darkvater@22: 	/* Calculate next tile */
truelight@0: 	tile += _tileoffs_by_dir[t];
darkvater@22: 	// determine the track status on the next tile.
truelight@0: 	ts = GetTileTrackStatus(tile, 0) & _reachable_tracks[t];
truelight@0: 	
darkvater@22: 	/* Calc position within the current tile ?? */
truelight@0: 	x = v->x_pos & 0xF;
truelight@0: 	y = v->y_pos & 0xF;
truelight@0: 	
truelight@0: 	switch(v->direction) {
truelight@0: 	case 0:
truelight@0: 		x = (~x) + (~y) + 24;
truelight@0: 		break;
truelight@0: 	case 7:
truelight@0: 		x = y;
truelight@0: 		/* fall through */
truelight@0: 	case 1:
truelight@0: 		x = (~x) + 16;
truelight@0: 		break;
truelight@0: 	case 2:
truelight@0: 		x = (~x) + y + 8;
truelight@0: 		break;
truelight@0: 	case 3:
truelight@0: 		x = y;
truelight@0: 		break;
truelight@0: 	case 4:
truelight@0: 		x = x + y - 8;
truelight@0: 		break;
truelight@0: 	case 6:
truelight@0: 		x = (~y) + x + 8;
truelight@0: 		break;
truelight@0: 	}
truelight@0: 
truelight@0: 	if ( (uint16)ts != 0) {
truelight@0: 		if ((ts &= (ts >> 16)) == 0) {
truelight@0: 			// make a rail/road crossing red
truelight@0: 			if (IS_TILETYPE(tile, MP_STREET) && (_map5[tile] & 0xF0)==0x10) {
truelight@0: 				if (!(_map5[tile] & 4)) {
truelight@0: 					_map5[tile] |= 4;
truelight@0: 					SndPlayVehicleFx(12, v);
truelight@0: 					MarkTileDirtyByTile(tile);
truelight@0: 				}
truelight@0: 			}
truelight@0: 			return;
truelight@0: 		}
truelight@0: 	} else if (x + 4 > 15) {
truelight@0: 		v->cur_speed = 0;
truelight@0: 		ReverseTrainDirection(v);
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	// slow down
truelight@0: 	v->vehstatus |= VS_TRAIN_SLOWING;
truelight@0: 	t = _breakdown_speeds[x & 0xF];
truelight@0: 	if (!(v->direction&1)) t>>=1;
truelight@0: 	if ((uint16)t < v->cur_speed)
truelight@0: 		v->cur_speed = t;
truelight@0: }
truelight@0: 
truelight@0: static void TrainLocoHandler(Vehicle *v, bool mode)
truelight@0: {
truelight@0: 	int j;
truelight@0: 
truelight@0: 	/* train has crashed? */
truelight@0: 	if (v->u.rail.crash_anim_pos != 0) {
truelight@0: 		if (!mode) HandleCrashedTrain(v);
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (v->u.rail.force_proceed != 0)
truelight@0: 		v->u.rail.force_proceed--;
truelight@0: 
truelight@0: 	/* train is broken down? */
truelight@0: 	if (v->breakdown_ctr != 0) {
truelight@0: 		if (v->breakdown_ctr <= 2) {
truelight@0: 			HandleBrokenTrain(v);
truelight@0: 			return;
truelight@0: 		}
truelight@0: 		v->breakdown_ctr--;
truelight@0: 	}
truelight@0: 
truelight@0: 	if (v->u.rail.flags & VRF_REVERSING && v->cur_speed == 0) {
truelight@0: 		ReverseTrainDirection(v);
truelight@0: 	}
truelight@0: 
truelight@0: 	/* exit if train is stopped */
truelight@0: 	if (v->vehstatus & VS_STOPPED && v->cur_speed == 0)
truelight@0: 		return;
truelight@0: 
truelight@0: 
truelight@0: 	if (ProcessTrainOrder(v)) {
truelight@0: 		v->load_unload_time_rem = 0;
truelight@0: 		v->cur_speed = 0;
truelight@0: 		v->subspeed = 0;
truelight@0: 		ReverseTrainDirection(v);
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	HandleTrainLoading(v, mode);
truelight@0: 
truelight@0: 	if ((v->next_order & OT_MASK) == OT_LOADING)
truelight@0: 		return;
truelight@0: 
truelight@0: 	if (CheckTrainStayInDepot(v))
truelight@0: 		return;
truelight@0: 
truelight@0: 	if (!mode) HandleLocomotiveSmokeCloud(v);
truelight@0: 
truelight@0: 	j = UpdateTrainSpeed(v);
truelight@0: 	if (j == 0) {
truelight@0: 		// if the vehicle has speed 0, update the last_speed field.
truelight@0: 		if (v->cur_speed != 0)
truelight@0: 			return;
truelight@0: 	} else {
truelight@0: 		TrainCheckIfLineEnds(v);
truelight@0: 
truelight@0: 		do {
truelight@0: 			TrainController(v);
truelight@0: 			if (v->cur_speed <= 0x100)
truelight@0: 				break;
truelight@0: 		} while (--j != 0);
truelight@0: 	}
truelight@0: 
truelight@0: 	SetLastSpeed(v, v->cur_speed);
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: void Train_Tick(Vehicle *v)
truelight@0: {
truelight@0: 	if (_age_cargo_skip_counter == 0 && v->cargo_days != 0xff)
truelight@0: 		v->cargo_days++;
truelight@0: 
truelight@0: 	v->tick_counter++;
truelight@0: 
truelight@0: 	if (v->subtype == 0) {
truelight@0: 		TrainLocoHandler(v, false);
truelight@0: 		
truelight@0: 		// make sure vehicle wasn't deleted.
truelight@0: 		if (v->type == VEH_Train && v->subtype == 0)
truelight@0: 			TrainLocoHandler(v, true);
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: 
truelight@0: static const byte _depot_track_ind[4] = {0,1,0,1};
truelight@0: 
truelight@0: void TrainEnterDepot(Vehicle *v, uint tile)
truelight@0: {
truelight@0: 	byte t;
truelight@0: 
truelight@0: 	SetSignalsOnBothDir(tile, _depot_track_ind[_map5[tile]&3]);
truelight@0: 
truelight@0: 	if (v->subtype != 0)
truelight@0: 		v = GetFirstVehicleInChain(v);
truelight@0: 
truelight@0: 	v->date_of_last_service = _date;
truelight@0: 	v->breakdowns_since_last_service = 0;
truelight@0: 	v->reliability = _engines[v->engine_type].reliability;
truelight@0: 	InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
truelight@0: 
truelight@0: 	v->load_unload_time_rem = 0;
truelight@0: 	v->cur_speed = 0;
truelight@0: 
truelight@0: 	MaybeRenewVehicle(v, EstimateTrainCost(&_rail_vehicle_info[v->engine_type]));
truelight@0: 
truelight@0: 	if ((v->next_order&OT_MASK) == OT_GOTO_DEPOT) {
truelight@0: 		InvalidateWindow(WC_VEHICLE_VIEW, v->index);
truelight@0: 	
truelight@0: 		t = v->next_order;
truelight@0: 		v->next_order = OT_DUMMY;
truelight@0: 
truelight@0: 		// Part of the schedule?
truelight@0: 		if (t & OF_UNLOAD) { v->u.rail.days_since_order_progr = 0; v->cur_order_index++; }
truelight@0: 
truelight@0: 		// User initiated?
truelight@0: 		else if (t & OF_FULL_LOAD) {
truelight@0: 			v->vehstatus |= VS_STOPPED;
truelight@0: 			if (v->owner == _local_player) {
truelight@0: 				SET_DPARAM16(0, v->unitnumber);
truelight@0: 				AddNewsItem(
truelight@0: 					STR_8814_TRAIN_IS_WAITING_IN_DEPOT,
truelight@0: 					NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0),
truelight@0: 					v->index,
truelight@0: 					0);
truelight@0: 			}
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: static void CheckIfTrainNeedsService(Vehicle *v)
truelight@0: {
truelight@0: 	uint tile;
truelight@0: 	byte depot;
truelight@0: 
truelight@76: 	if (_patches.servint_trains == 0)
truelight@0: 		return;
truelight@0: 
truelight@0: 	if (v->date_of_last_service + v->service_interval > _date)
truelight@0: 		return;
truelight@0: 
truelight@0: 	if (v->vehstatus & VS_STOPPED)
truelight@0: 		return;
truelight@0: 
truelight@76: 	if (_patches.gotodepot && ScheduleHasDepotOrders(v->schedule_ptr))
truelight@0: 		return;
truelight@0: 	
truelight@0: 	// Don't interfere with a depot visit scheduled by the user, or a
truelight@0: 	// depot visit by the order list.
truelight@0: 	if ((v->next_order & OT_MASK) == OT_GOTO_DEPOT &&
truelight@0: 			(v->next_order & (OF_FULL_LOAD|OF_UNLOAD)) != 0)
truelight@0: 		return;
truelight@0: 
truelight@0: 	tile = FindClosestTrainDepot(v);
truelight@0: 	if (tile == (uint)-1 || GetTileDist(v->tile, tile) > 12) {
truelight@0: 		if ((v->next_order & OT_MASK) == OT_GOTO_DEPOT) {
truelight@0: 			v->next_order = OT_DUMMY;
truelight@0: 			InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
truelight@0: 		}
truelight@0: 		return;
truelight@0: 	}
truelight@0: 
truelight@0: 	depot = GetDepotByTile(tile);
truelight@0: 
truelight@0: 	if ((v->next_order & OT_MASK) == OT_GOTO_DEPOT && v->next_order_param != depot && !CHANCE16(3,16))
truelight@0: 		return;
truelight@0: 
truelight@0: 	v->next_order = OT_GOTO_DEPOT | OF_NON_STOP;
truelight@0: 	v->next_order_param = depot;
truelight@0: 	v->dest_tile = tile;
truelight@0: 	InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4);
truelight@0: }
truelight@0: 
truelight@0: int32 GetTrainRunningCost(Vehicle *v)
truelight@0: {
truelight@0: 	int32 cost = 0;
truelight@0: 
truelight@0: 	do {
truelight@0: 		const RailVehicleInfo *rvi = &_rail_vehicle_info[v->engine_type];
truelight@0: 		if (rvi->running_cost_base)
truelight@0: 			cost += rvi->running_cost_base * _price.running_rail[rvi->engclass];
truelight@0: 	} while ( (v=v->next) != NULL );
truelight@0: 
truelight@0: 	return cost;
truelight@0: }
truelight@0: 
truelight@0: void OnNewDay_Train(Vehicle *v)
truelight@0: {
truelight@0: 	TileIndex tile;
truelight@0: 
truelight@0: 	if ((++v->day_counter & 7) == 0)
truelight@0: 		DecreaseVehicleValue(v);
truelight@0: 
truelight@0: 	if (v->subtype == 0) {
truelight@0: 		CheckVehicleBreakdown(v);
truelight@0: 		AgeVehicle(v);
truelight@0: 		
truelight@0: 		CheckIfTrainNeedsService(v);
truelight@0: 		
truelight@0: 		// check if train hasn't advanced in its order list for a set number of days
truelight@0: 		if (_patches.lost_train_days && v->num_orders && !(v->vehstatus & VS_STOPPED) && ++v->u.rail.days_since_order_progr >= _patches.lost_train_days && v->owner == _local_player) {
truelight@0: 			v->u.rail.days_since_order_progr = 0;
truelight@0: 			SET_DPARAM16(0, v->unitnumber);
truelight@0: 			AddNewsItem(
truelight@0: 				STR_TRAIN_IS_LOST,
truelight@0: 				NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0),
truelight@0: 				v->index,
truelight@0: 				0);
truelight@0: 		}
truelight@0: 
dominik@19: 		CheckOrders(v);
dominik@19: 				
truelight@0: 		/* update destination */
truelight@0: 		if ((v->next_order & OT_MASK) == OT_GOTO_STATION &&
truelight@0: 				(tile=DEREF_STATION(v->next_order_param)->train_tile) != 0)
truelight@0: 					v->dest_tile = tile;
truelight@0: 
truelight@0: 		if ((v->vehstatus & VS_STOPPED) == 0) {
truelight@0: 			/* running costs */
truelight@0: 			int32 cost = GetTrainRunningCost(v) / 364;
truelight@0: 
truelight@0: 			v->profit_this_year -= cost >> 8;
truelight@0: 
truelight@0: 			SET_EXPENSES_TYPE(EXPENSES_TRAIN_RUN);
truelight@0: 			SubtractMoneyFromPlayerFract(v->owner, cost);
truelight@0: 
truelight@0: 			InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
truelight@0: 			InvalidateWindow(WC_TRAINS_LIST, v->owner);
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: void TrainsYearlyLoop()
truelight@0: {
truelight@0: 	Vehicle *v;
truelight@0: 
truelight@0: 	FOR_ALL_VEHICLES(v) {
truelight@0: 		if (v->type == VEH_Train && v->subtype == 0) {
truelight@0: 			
truelight@0: 			// show warning if train is not generating enough income last 2 years (corresponds to a red icon in the vehicle list)
truelight@0: 			if (_patches.train_income_warn && v->owner == _local_player && v->age >= 730 && v->profit_this_year < 0) {
truelight@0: 				SET_DPARAM32(1, v->profit_this_year);
truelight@0: 				SET_DPARAM16(0, v->unitnumber);
truelight@0: 				AddNewsItem(
truelight@0: 					STR_TRAIN_IS_UNPROFITABLE,
truelight@0: 					NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0),
truelight@0: 					v->index,
truelight@0: 					0);
truelight@0: 			}
truelight@0: 
truelight@0: 			v->profit_last_year = v->profit_this_year;
truelight@0: 			v->profit_this_year = 0;
truelight@0: 			InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
truelight@0: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: extern void ShowTrainViewWindow(Vehicle *v);
truelight@0: 
truelight@0: void HandleClickOnTrain(Vehicle *v)
truelight@0: {
truelight@0: 	if (v->subtype != 0) v = GetFirstVehicleInChain(v);
truelight@0: 	ShowTrainViewWindow(v);
truelight@0: }
truelight@0: 
truelight@0: void InitializeTrains()
truelight@0: {
truelight@0: 	_age_cargo_skip_counter = 1;
truelight@0: }
truelight@0: 
truelight@0: int ScheduleHasDepotOrders(uint16 *schedule)
truelight@0: {
truelight@0: 	for (;*schedule!=0;schedule++)
truelight@0: 		if ((*schedule&OT_MASK) == OT_GOTO_DEPOT)
truelight@0: 			return true;
truelight@0: 	return false;
truelight@0: }