From efaeb275f78e18d594d9ee8ff04eccd2dc59512c Mon Sep 17 00:00:00 2001 From: truelight Date: Mon, 9 Aug 2004 17:04:08 +0000 Subject: (svn r1) Import of revision 975 of old (crashed) SVN --- train_cmd.c | 2645 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2645 insertions(+) create mode 100644 train_cmd.c (limited to 'train_cmd.c') diff --git a/train_cmd.c b/train_cmd.c new file mode 100644 index 000000000..615610885 --- /dev/null +++ b/train_cmd.c @@ -0,0 +1,2645 @@ +#include "stdafx.h" +#include "ttd.h" +#include "vehicle.h" +#include "command.h" +#include "pathfind.h" +#include "station.h" +#include "table/train_cmd.h" +#include "gfx.h" +#include "news.h" +#include "engine.h" +#include "player.h" + + +#define is_firsthead_sprite(spritenum) \ + (is_custom_sprite(spritenum) \ + ? is_custom_firsthead_sprite(spritenum) \ + : _engine_sprite_add[spritenum] == 0) + + +static const byte _vehicle_initial_x_fract[4] = {10,8,4,8}; +static const byte _vehicle_initial_y_fract[4] = {8,4,8,10}; +static const byte _state_dir_table[4] = { 0x20, 8, 0x10, 4 }; + +static const byte _signal_onedir[14] = { + 0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0, + 0x40, 0x40, 0x40, 0x10, 0x80, 0x20 +}; + +static const byte _signal_otherdir[14] = { + 0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0, + 0x80, 0x80, 0x80, 0x20, 0x40, 0x10 +}; + +void UpdateTrainAcceleration(Vehicle *v) +{ + uint acc, power=0, max_speed=5000, weight=0; + Vehicle *u = v; + + assert(v->subtype == 0); + + // compute stuff like max speed, power, and weight. + do { + const RailVehicleInfo *rvi = &_rail_vehicle_info[u->engine_type]; + + // power is sum of the power for all engines + power += rvi->power; + + // limit the max speed to the speed of the slowest vehicle. + if (rvi->max_speed && rvi->max_speed <= max_speed) max_speed = rvi->max_speed; + + // weight is the sum of the weight of the wagon and the weight of the cargo. + weight += rvi->weight; + weight += (_cargoc.weights[u->cargo_type] * u->cargo_count) >> 4; + + } while ( (u=u->next) != NULL); + + // these are shown in the UI + v->u.rail.cached_weight = weight; + v->u.rail.cached_power = power; + v->max_speed = max_speed; + + assert(weight != 0); + + // compute acceleration + acc = power / weight * 4; + + if (acc >= 255) acc=255; + if (acc == 0) acc++; + + v->acceleration = (byte)acc; +} + +#define F_GRAV 9.82f +#define F_THETA 0.05f + +#define F_HP_KW 0.74569f +#define F_KPH_MS 0.27778f +#define F_MU 0.3f + +#define F_COEF_FRIC 0.04f +#define F_COEF_ROLL 0.18f + +#define F_CURVE_FACTOR (1/96.f) + +bool IsTunnelTile(TileIndex tile); + +static int GetRealisticAcceleration(Vehicle *v) +{ + uint emass = 0; + Vehicle *u = v; + float f = 0.0f, spd; + int curves = 0; + + assert(v->subtype == 0); + + // compute inclination force and number of curves. + do { + const RailVehicleInfo *rvi = &_rail_vehicle_info[u->engine_type]; + uint mass = rvi->weight + ((_cargoc.weights[u->cargo_type] * u->cargo_count) >> 4); + if (rvi->power) emass += mass; + + if (u->u.rail.flags & VRF_GOINGUP) { + f += (float)mass * ( -F_GRAV * F_THETA); + } else if (u->u.rail.flags & VRF_GOINGDOWN) { + f += (float)mass * ( F_GRAV * F_THETA); + } + + // compute curve penalty.. + if (u->next != NULL) { + uint diff = (u->direction - u->next->direction) & 7; + if (diff) { + curves += (diff == 1 || diff == 7) ? 1 : 3; + } + } + } while ((u = u->next) != NULL); + + spd = (float)(v->cur_speed ? v->cur_speed : 1); + + // compute tractive effort + { + float te = (float)v->u.rail.cached_power * (F_HP_KW/F_KPH_MS) / spd; + float te2 = (float)emass * (F_MU * F_GRAV); + if (te > te2) te = te2; + f += te; + } + + // add air resistance + { + float cx = 1.0f; // NOT DONE + + // air resistance is doubled in tunnels. + if (v->vehstatus == 0x40) cx *= 2; + + f -= cx * spd * spd * (F_KPH_MS * F_KPH_MS * 0.001f); + } + + // after this f contains the acceleration. + f /= (float)v->u.rail.cached_weight; + + // add friction to sum of forces (avoid mul by weight). (0.001 because we want kN) + f -= (F_COEF_FRIC * F_GRAV * 0.001f + (F_COEF_ROLL * F_KPH_MS * F_GRAV * 0.001f) * spd); + + // penalty for curves? + if (curves) + f -= (float)min(curves, 8) * F_CURVE_FACTOR; + + return (int)(f * (1.0/(F_KPH_MS * 0.015f)) + 0.5f); +} + + +int GetTrainImage(Vehicle *v, byte direction) +{ + int img = v->spritenum; + int base; + + if (is_custom_sprite(img)) { + base = GetCustomVehicleSprite(v, direction + 4 * is_custom_secondhead_sprite(img)); + if (base) return base; + img = _engine_original_sprites[v->engine_type]; + } + + base = _engine_sprite_base[img] + ((direction + _engine_sprite_add[img]) & _engine_sprite_and[img]); + + if (v->cargo_count >= (v->cargo_cap >> 1)) + base += _wagon_full_adder[img]; + return base; +} + +void DrawTrainEngine(int x, int y, int engine, uint32 image_ormod) +{ + const RailVehicleInfo *rvi = &_rail_vehicle_info[engine]; + + int img = rvi->image_index; + uint32 image = 0; + + if (is_custom_sprite(img)) { + image = GetCustomEngineSprite(engine, -1, CID_PURCHASE, 0, 0, 6); + if (!image) img = _engine_original_sprites[engine]; + } + if (!image) { + image = (6 & _engine_sprite_and[img]) + _engine_sprite_base[img]; + } + + if (rvi->flags & RVI_MULTIHEAD) { + DrawSprite(image | image_ormod, x-14, y); + x += 15; + image = 0; + if (is_custom_sprite(img)) { + image = GetCustomEngineSprite(engine, -1, CID_PURCHASE, 0, 0, 2); + if (!image) img = _engine_original_sprites[engine]; + } + if (!image) { + image = ((6 + _engine_sprite_add[img+1]) & _engine_sprite_and[img+1]) + _engine_sprite_base[img+1]; + } + } + DrawSprite(image | image_ormod, x, y); +} + +void DrawTrainEngineInfo(int engine, int x, int y, int maxw) +{ + const RailVehicleInfo *rvi = &_rail_vehicle_info[engine]; + int cap; + uint multihead = ((rvi->flags & RVI_MULTIHEAD) ? 1 : 0); + + SET_DPARAM32(0, ((_price.build_railvehicle >> 3) * rvi->base_cost) >> 5); + SET_DPARAM16(2, rvi->max_speed * 10 >> 4); + SET_DPARAM16(3, rvi->power << multihead); + SET_DPARAM16(1, rvi->weight << multihead); + + SET_DPARAM32(4, (rvi->running_cost_base * _price.running_rail[rvi->engclass] >> 8) << multihead); + + cap = rvi->capacity; + SET_DPARAM16(5, STR_8838_N_A); + if (cap != 0) { + SET_DPARAM16(6, cap << multihead); + SET_DPARAM16(5, _cargoc.names_long_p[rvi->cargo_type]); + } + DrawStringMultiCenter(x, y, STR_885B_COST_WEIGHT_T_SPEED_POWER, maxw); +} + + +int32 CmdBuildRailWagon(uint engine, uint tile, uint32 flags) +{ + int32 value; + Vehicle *v; + const RailVehicleInfo *rvi; + int dir; + const Engine *e; + int x,y; + + rvi = &_rail_vehicle_info[engine]; + value = (rvi->base_cost * _price.build_railwagon) >> 8; + + if (!(flags & DC_QUERY_COST)) { + _error_message = STR_00E1_TOO_MANY_VEHICLES_IN_GAME; + + v = AllocateVehicle(); + if (v == NULL) + return CMD_ERROR; + + if (flags & DC_EXEC) { + byte img = rvi->image_index; + Vehicle *u; + + v->spritenum = img; + + u = _vehicles; + for(;;) { + if (u->type == VEH_Train && u->tile == (TileIndex)tile && + u->subtype == 4 && u->engine_type == engine) { + u = GetLastVehicleInChain(u); + break; + } + + if (++u == endof(_vehicles)) { + u = NULL; + break; + } + } + + v->engine_type = engine; + + dir = _map5[tile] & 3; + + v->direction = (byte)(dir*2+1); + v->tile = (TileIndex)tile; + + x = GET_TILE_X(tile)*16 | _vehicle_initial_x_fract[dir]; + y = GET_TILE_Y(tile)*16 | _vehicle_initial_y_fract[dir]; + + v->x_pos = x; + v->y_pos = y; + v->z_pos = GetSlopeZ(x,y); + v->owner = _current_player; + v->z_height = 6; + v->u.rail.track = 0x80; + v->vehstatus = VS_HIDDEN | VS_DEFPAL; + + v->subtype = 4; + if (u != NULL) { + u->next = v; + v->subtype = 2; + v->u.rail.first_engine = u->u.rail.first_engine; + if (v->u.rail.first_engine == 0xffff && u->subtype == 0) + v->u.rail.first_engine = u->engine_type; + } else { + v->u.rail.first_engine = 0xffff; + } + + v->cargo_type = rvi->cargo_type; + v->cargo_cap = rvi->capacity; + v->value = value; +// v->day_counter = 0; + + e = &_engines[engine]; + v->u.rail.railtype = e->railtype; + + v->build_year = _cur_year; + v->type = VEH_Train; + v->cur_image = 0xAC2; + + _new_wagon_id = v->index; + + VehiclePositionChanged(v); + + InvalidateWindow(WC_VEHICLE_DEPOT, v->tile); + } + } + + return value; +} + +// Move all free vehicles in the depot to the train +static void NormalizeTrainVehInDepot(Vehicle *u) +{ + Vehicle *v; + FOR_ALL_VEHICLES(v) { + if (v->type == VEH_Train && v->subtype==4 && + v->tile == u->tile && + v->u.rail.track == 0x80) { + if (DoCommandByTile(0,v->index | (u->index<<16), 1, DC_EXEC, CMD_MOVE_RAIL_VEHICLE) == CMD_ERROR) + break; + } + } +} + +static const byte _railveh_unk1[] = { + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 1, 1, 0, 0, 0, + 0, 0, 0, 0, 1, 0, 1, 0, + 0, 1, 1, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 1, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, +}; + +static const byte _railveh_score[] = { + 1, 4, 7, 19, 20, 30, 31, 19, + 20, 21, 22, 10, 11, 30, 31, 32, + 33, 34, 35, 29, 45, 32, 50, 40, + 41, 51, 52, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 60, 62, + 63, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 70, 71, 72, 73, + 74, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, +}; + + +static int32 EstimateTrainCost(const RailVehicleInfo *rvi) +{ + return (rvi->base_cost * (_price.build_railvehicle >> 3)) >> 5; +} + +/* Build a railroad vehicle + * p1 = vehicle type id + */ + +int32 CmdBuildRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2) +{ + const RailVehicleInfo *rvi; + int value,dir; + Vehicle *v, *u; + byte unit_num; + Engine *e; + uint tile; + + _cmd_build_rail_veh_var1 = 0; + + SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES); + + tile = TILE_FROM_XY(x,y); + rvi = &_rail_vehicle_info[p1]; + + if (rvi->flags & RVI_WAGON) { + return CmdBuildRailWagon(p1, tile, flags); + } + + value = EstimateTrainCost(rvi); + + if (!(flags & DC_QUERY_COST)) { + v = AllocateVehicle(); + if (v == NULL || _ptr_to_next_order >= endof(_order_array)) + return_cmd_error(STR_00E1_TOO_MANY_VEHICLES_IN_GAME); + + unit_num = GetFreeUnitNumber(VEH_Train); + if (unit_num > _patches.max_trains) + return_cmd_error(STR_00E1_TOO_MANY_VEHICLES_IN_GAME); + + if (flags & DC_EXEC) { + v->unitnumber = unit_num; + + dir = _map5[tile] & 3; + + v->direction = (byte)(dir*2+1); + v->tile = (TileIndex)tile; + v->owner = _current_player; + v->x_pos = (x |= _vehicle_initial_x_fract[dir]); + v->y_pos = (y |= _vehicle_initial_y_fract[dir]); + v->z_pos = GetSlopeZ(x,y); + v->z_height = 6; + v->u.rail.track = 0x80; + v->u.rail.first_engine = 0xffff; + v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL; +// v->subtype = 0; + v->spritenum = rvi->image_index; + v->cargo_type = rvi->cargo_type; + v->cargo_cap = rvi->capacity; + v->max_speed = rvi->max_speed; +// v->cargo_count = 0; + v->value = value; +// v->day_counter = 0; +// v->next_order = 0; +// v->next_station = 0; +// v->load_unload_time_rem = 0; +// v->progress = 0; +// v->targetairport = 0; +// v->crash_anim_pos = 0; + v->last_station_visited = 0xff; + v->dest_tile = 0; +// v->profit_last_year = 0; +// v->profit_this_year = 0; + + v->engine_type = (byte)p1; + e = &_engines[p1]; + + v->reliability = e->reliability; + v->reliability_spd_dec = e->reliability_spd_dec; + v->max_age = e->lifelength * 366; + + v->string_id = STR_SV_TRAIN_NAME; +// v->cur_speed = 0; +// v->subspeed = 0; + v->u.rail.railtype = e->railtype; + _new_train_id = v->index; +// v->cur_order_index = 0; +// v->num_orders = 0; + + *(v->schedule_ptr = _ptr_to_next_order++) = 0; +// v->next_in_chain = 0xffff; +// v->next = NULL; + + v->service_interval = _patches.servint_trains; +// v->breakdown_ctr = 0; +// v->breakdowns_since_last_service = 0; +// v->unk4D = 0; + v->date_of_last_service = _date; + v->build_year = _cur_year; + v->type = VEH_Train; + v->cur_image = 0xAC2; + + VehiclePositionChanged(v); + + if (rvi->flags&RVI_MULTIHEAD && (u=AllocateVehicle()) != NULL) { + u->direction = v->direction; + u->owner = v->owner; + u->tile = v->tile; + u->x_pos = v->x_pos; + u->y_pos = v->y_pos; + u->z_pos = v->z_pos; + u->z_height = 6; + u->u.rail.track = 0x80; + v->u.rail.first_engine = 0xffff; + u->vehstatus = VS_HIDDEN | VS_DEFPAL; + u->subtype = 2; + u->spritenum = v->spritenum + 1; + u->cargo_type = v->cargo_type; + u->cargo_cap = v->cargo_cap; + u->u.rail.railtype = v->u.rail.railtype; +// u->next_in_chain = 0xffff; + v->next = u; + u->engine_type = v->engine_type; + u->build_year = v->build_year; + v->value = u->value = v->value >> 1; +// u->day_counter = 0; + u->type = VEH_Train; + u->cur_image = 0xAC2; + VehiclePositionChanged(u); + } + + UpdateTrainAcceleration(v); + NormalizeTrainVehInDepot(v); + + InvalidateWindow(WC_VEHICLE_DEPOT, tile); + InvalidateWindow(WC_TRAINS_LIST, v->owner); + InvalidateWindow(WC_COMPANY, v->owner); + } + } + _cmd_build_rail_veh_var1 = _railveh_unk1[p1]; + _cmd_build_rail_veh_score = _railveh_score[p1]; + return value; +} + + +bool IsTrainDepotTile(TileIndex tile) +{ + return IS_TILETYPE(tile, MP_RAILWAY) && + (_map5[tile] & 0xFC) == 0xC0; +} + +bool IsTunnelTile(TileIndex tile) +{ + return IS_TILETYPE(tile, MP_TUNNELBRIDGE) && + (_map5[tile]&0x80) == 0; +} + + +int CheckStoppedInDepot(Vehicle *v) +{ + int count; + TileIndex tile = v->tile; + + /* check if stopped in a depot */ + if (!IsTrainDepotTile(tile) || v->cur_speed != 0) { +errmsg: + _error_message = STR_881A_TRAINS_CAN_ONLY_BE_ALTERED; + return -1; + } + + count = 0; + do { + count++; + if (v->u.rail.track != 0x80 || v->tile != (TileIndex)tile || + (v->subtype==0 && !(v->vehstatus&VS_STOPPED))) + goto errmsg; + } while ( (v=v->next) != NULL); + + return count; +} + +// unlink a rail wagon from the linked list. +// returns the new value of first +static Vehicle *UnlinkWagon(Vehicle *v, Vehicle *first) +{ + // unlinking the first vehicle of the chain? + v->u.rail.first_engine = 0xffff; + if (v == first) { + Vehicle *u; + if ((v=v->next) == NULL) return NULL; + for (u=v; u; u=u->next) u->u.rail.first_engine = v->engine_type; + v->subtype = 4; + return v; + } else { + Vehicle *u; + for(u=first; u->next!=v; u=u->next) {} + u->next = v->next; + return first; + } +} + +static Vehicle *FindGoodVehiclePos(Vehicle *src) +{ + Vehicle *dst; + uint16 eng = src->engine_type; + TileIndex tile = src->tile; + + FOR_ALL_VEHICLES(dst) { + if (dst->type==VEH_Train && dst->subtype==4 && dst->tile==tile) { + // check so all vehicles in the line have the same engine. + Vehicle *v = dst; + while (v->engine_type == eng) { + if ((v = v->next) == NULL) return dst; + } + } + } + + return NULL; +} + +/* p1 & 0xffff= source vehicle index + p1 & 0xffff0000 = what wagon to put the wagon AFTER, 0xffff0000 to make a new line + p2 & 1 = move all vehicles following the vehicle.. + */ + +int32 CmdMoveRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2) +{ + Vehicle *src, *dst, *src_head, *dst_head; + bool is_loco; + + src = &_vehicles[p1 & 0xffff]; + if (src->type != VEH_Train) return CMD_ERROR; + + is_loco = !(_rail_vehicle_info[src->engine_type].flags & RVI_WAGON) + && is_firsthead_sprite(src->spritenum); + + // if nothing is selected as destination, try and find a matching vehicle to drag to. + if (((int32)p1 >> 16) == -1) { + dst = NULL; + if (!is_loco) dst = FindGoodVehiclePos(src); + } else { + dst = &_vehicles[((int32)p1 >> 16)]; + } + + // don't move the same vehicle.. + if (src == dst) + return 0; + + /* the player must be the owner */ + if (!CheckOwnership(src->owner) || (dst!=NULL && !CheckOwnership(dst->owner))) + return CMD_ERROR; + + /* locate the head of the two chains */ + src_head = GetFirstVehicleInChain(src); + dst_head = NULL; + if (dst != NULL) dst_head = GetFirstVehicleInChain(dst); + + /* check if all vehicles in the source train are stopped */ + if (CheckStoppedInDepot(src_head) < 0) + return CMD_ERROR; + + /* check if all the vehicles in the dest train are stopped, + * and that the length of the dest train is no longer than XXX vehicles */ + if (dst_head != NULL) { + int num = CheckStoppedInDepot(dst_head); + if (num < 0) + return CMD_ERROR; + + if (num > (_patches.mammoth_trains ? 100 : 9) && dst_head->subtype==0) + return_cmd_error(STR_8819_TRAIN_TOO_LONG); + + // if it's a multiheaded vehicle we're dragging to, drag to the vehicle before.. + while (is_custom_secondhead_sprite(dst->spritenum) + || (!is_custom_sprite(dst->spritenum) && _engine_sprite_add[dst->spritenum] != 0)) { + Vehicle *v = GetPrevVehicleInChain(dst); + if (!v || src == v) break; + dst = v; + } + + assert(dst_head->tile == src_head->tile); + } + + // when moving all wagons, we can't have the same src_head and dst_head + if (p2 & 1 && src_head == dst_head) + return 0; + + // moving a loco to a new line?, then we need to assign a unitnumber. + if (dst == NULL && src->subtype != 0 && is_loco) { + uint unit_num = GetFreeUnitNumber(VEH_Train); + if (unit_num > _patches.max_trains) + return_cmd_error(STR_00E1_TOO_MANY_VEHICLES_IN_GAME); + + if (flags & DC_EXEC) + src->unitnumber = unit_num; + } + + + /* do it? */ + if (flags & DC_EXEC) { + if (p2 & 1) { + // unlink ALL wagons + if (src != src_head) { + Vehicle *v = src_head; + while (v->next != src) v=v->next; + v->next = NULL; + } + } else { + // unlink single wagon from linked list + UnlinkWagon(src, src_head); + src->next = NULL; + } + + if (dst == NULL) { + // move the train to an empty line. for locomotives, we set the type to 0. for wagons, 4. + if (is_loco) { + if (src->subtype != 0) { + // setting the type to 0 also involves setting up the schedule_ptr field. + src->subtype = 0; + assert(src->schedule_ptr == NULL); + *(src->schedule_ptr = _ptr_to_next_order++) = 0; + src->num_orders = 0; + } + dst_head = src; + } else { + src->subtype = 4; + } + src->u.rail.first_engine = 0xffff; + } else { + if (src->subtype == 0) { + // the vehicle was previously a loco. need to free the schedule list and delete vehicle windows etc. + DeleteWindowById(WC_VEHICLE_VIEW, src->index); + DeleteVehicleSchedule(src); + } + + src->subtype = 2; + src->unitnumber = 0; // doesn't occupy a unitnumber anymore. + + // setup first_engine + src->u.rail.first_engine = dst->u.rail.first_engine; + if (src->u.rail.first_engine == 0xffff && dst->subtype == 0) + src->u.rail.first_engine = dst->engine_type; + + // link in the wagon(s) in the chain. + { + Vehicle *v = src; + while (v->next != NULL) { + v->next->u.rail.first_engine = v->u.rail.first_engine; + v = v->next; + } + v->next = dst->next; + } + dst->next = src; + } + + if (src_head->subtype == 0) + UpdateTrainAcceleration(src_head); + InvalidateWindow(WC_VEHICLE_DETAILS, src_head->index); + + if (dst_head) { + if (dst_head->subtype == 0) + UpdateTrainAcceleration(dst_head); + InvalidateWindow(WC_VEHICLE_DETAILS, dst_head->index); + } + + InvalidateWindow(WC_VEHICLE_DEPOT, src_head->tile); + InvalidateWindow(WC_TRAINS_LIST, _current_player); + } + + return 0; +} + +/* p1 = train to start / stop */ +int32 CmdStartStopTrain(int x, int y, uint32 flags, uint32 p1, uint32 p2) +{ + Vehicle *v; + + v = &_vehicles[p1]; + + if (!CheckOwnership(v->owner)) + return CMD_ERROR; + + if (flags & DC_EXEC) { + v->u.rail.days_since_order_progr = 0; + v->vehstatus ^= VS_STOPPED; + InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4); + InvalidateWindow(WC_VEHICLE_DEPOT, v->tile); + } + return 0; +} + +// p1 = wagon/loco index +// p2 = mode +// 0: sell just the vehicle +// 1: sell the vehicle and all vehicles that follow it in the chain +// 2: when selling attached locos, rearrange all vehicles after it to separate lines. +int32 CmdSellRailWagon(int x, int y, uint32 flags, uint32 p1, uint32 p2) +{ + Vehicle *v, *first,*last; + int32 cost; + + SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES); + + v = &_vehicles[p1]; + + if (!CheckOwnership(v->owner)) + return CMD_ERROR; + + // get first vehicle in chain + first = v; + if (first->subtype != 0) { + first = GetFirstVehicleInChain(first); + last = NULL; + } else { + if (p2 != 1) { + // sell last part of multiheaded? + last = GetLastVehicleInChain(v); + if (is_firsthead_sprite(last->spritenum)) + last = NULL; + } else { + last = NULL; + } + } + + // make sure the vehicle is stopped in the depot + if (CheckStoppedInDepot(first) < 0) + return CMD_ERROR; + + + if (flags & DC_EXEC) { + // always redraw the depot. maybe redraw train list + InvalidateWindow(WC_VEHICLE_DEPOT, first->tile); + if (first->subtype == 0) InvalidateWindow(WC_TRAINS_LIST, first->owner); + // when selling an attached locomotive. we need to delete its window. + if (v->subtype == 0) { + DeleteWindowById(WC_VEHICLE_VIEW, v->index); + + // rearrange all vehicles that follow to separate lines. + if (p2 == 2) { + Vehicle *u,*tmp; + u = v->next; + while (u != last) { + tmp = u; + u = u->next; + DoCommandByTile(tmp->tile, tmp->index | ((-1)<<16), 0, DC_EXEC, CMD_MOVE_RAIL_VEHICLE); + } + } + } + + // delete the vehicles + cost = 0; + for(;;) { + Vehicle *tmp; + + assert(first); + first = UnlinkWagon(v, first); + cost -= v->value; + tmp = v; + v = v->next; + DeleteVehicle(tmp); + if (v == NULL || p2 != 1) break; + } + + // delete last vehicle of multiheaded train? + if (last) { + first = UnlinkWagon(last, first); + cost -= last->value; + DeleteVehicle(last); + } + + // an attached train changed? + if (first && first->subtype == 0) { + UpdateTrainAcceleration(first); + InvalidateWindow(WC_VEHICLE_DETAILS, first->index); + } + } else { + cost = 0; + for(;;) { + cost -= v->value; + if ((v=v->next) == NULL || p2 != 1) break; + } + if (last) cost -= last->value; + } + + return cost; +} + +static void UpdateTrainDeltaXY(Vehicle *v, int direction) +{ +#define MKIT(a,b,c,d) ((a&0xFF)<<24) | ((b&0xFF)<<16) | ((c&0xFF)<<8) | ((d&0xFF)<<0) + static const uint32 _delta_xy_table[8] = { + MKIT(3, 3, -1, -1), + MKIT(3, 7, -1, -3), + MKIT(3, 3, -1, -1), + MKIT(7, 3, -3, -1), + MKIT(3, 3, -1, -1), + MKIT(3, 7, -1, -3), + MKIT(3, 3, -1, -1), + MKIT(7, 3, -3, -1), + }; +#undef MKIT + + uint32 x = _delta_xy_table[direction]; + + v->x_offs = (byte)x; + v->y_offs = (byte)(x>>=8); + v->sprite_width = (byte)(x>>=8); + v->sprite_height = (byte)(x>>=8); +} + +static void UpdateVarsAfterSwap(Vehicle *v) +{ + UpdateTrainDeltaXY(v, v->direction); + v->cur_image = GetTrainImage(v, v->direction); + BeginVehicleMove(v); + VehiclePositionChanged(v); + EndVehicleMove(v); +} + +static void SetLastSpeed(Vehicle *v, int spd) { + int old = v->u.rail.last_speed; + if (spd != old) { + v->u.rail.last_speed = spd; + if (_patches.vehicle_speed || !old != !spd) + InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4); + } +} + +static void ReverseTrainSwapVeh(Vehicle *v, int l, int r) +{ + Vehicle *a, *b; + + /* locate vehicles to swap */ + for(a=v; l!=0; l--) { a = a->next; } + for(b=v; r!=0; r--) { b = b->next; } + + if (a != b) { + /* swap the hidden bits */ + { + uint16 tmp = (a->vehstatus & ~VS_HIDDEN) | (b->vehstatus&VS_HIDDEN); + b->vehstatus = (b->vehstatus & ~VS_HIDDEN) | (a->vehstatus&VS_HIDDEN); + a->vehstatus = tmp; + } + + /* swap variables */ + swap_byte(&a->u.rail.track, &b->u.rail.track); + swap_byte(&a->direction, &b->direction); + + /* toggle direction */ + if (!(a->u.rail.track & 0x80)) a->direction ^= 4; + if (!(b->u.rail.track & 0x80)) b->direction ^= 4; + + /* swap more variables */ + swap_int16(&a->x_pos, &b->x_pos); + swap_int16(&a->y_pos, &b->y_pos); + swap_tile(&a->tile, &b->tile); + swap_byte(&a->z_pos, &b->z_pos); + + /* update other vars */ + UpdateVarsAfterSwap(a); + UpdateVarsAfterSwap(b); + } else { + if (!(a->u.rail.track & 0x80)) a->direction ^= 4; + UpdateVarsAfterSwap(a); + } +} + +static void ReverseTrainDirection(Vehicle *v) +{ + int l = 0, r = -1; + Vehicle *u; + + if (IsTrainDepotTile(v->tile)) + InvalidateWindow(WC_VEHICLE_DEPOT, v->tile); + + // count number of vehicles + u = v; + do r++; while ( (u = u->next) != NULL ); + + /* swap start<>end, start+1<>end-1, ... */ + do { + ReverseTrainSwapVeh(v, l++, r--); + } while (l <= r); + + if (IsTrainDepotTile(v->tile)) + InvalidateWindow(WC_VEHICLE_DEPOT, v->tile); + + v->u.rail.flags &= ~VRF_REVERSING; +} + +/* p1 = vehicle */ +int32 CmdReverseTrainDirection(int x, int y, uint32 flags, uint32 p1, uint32 p2) +{ + Vehicle *v; + + v = &_vehicles[p1]; + + if (!CheckOwnership(v->owner)) + return CMD_ERROR; + + _error_message = STR_EMPTY; + +// if (v->u.rail.track & 0x80 || IsTrainDepotTile(v->tile)) +// return CMD_ERROR; + + if (v->u.rail.crash_anim_pos != 0 || v->breakdown_ctr != 0) + return CMD_ERROR; + + if (flags & DC_EXEC) { + if (_patches.realistic_acceleration && v->cur_speed != 0) { + v->u.rail.flags ^= VRF_REVERSING; + } else { + v->cur_speed = 0; + SetLastSpeed(v, 0); + ReverseTrainDirection(v); + } + } + return 0; +} + +int32 CmdForceTrainProceed(int x, int y, uint32 flags, uint32 p1, uint32 p2) +{ + Vehicle *v; + + v = &_vehicles[p1]; + + if (!CheckOwnership(v->owner)) + return CMD_ERROR; + + if (flags & DC_EXEC) + v->u.rail.force_proceed = 0x50; + + return 0; +} + +// p1 = vehicle to refit +// p2 = new cargo + +int32 CmdRefitRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2) +{ + Vehicle *v; + int32 cost; + uint num; + + SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES); + + v = &_vehicles[p1]; + if (!CheckOwnership(v->owner) || CheckStoppedInDepot(v) < 0) + return CMD_ERROR; + + cost = 0; + num = 0; + + do { + if (!(_rail_vehicle_info[v->engine_type].flags & RVI_WAGON) && (byte)p2 != v->cargo_type && v->cargo_cap != 0) { + cost += (_price.ship_base >> 7); + num += v->cargo_cap; + if (flags & DC_EXEC) { + v->cargo_count = 0; + v->cargo_type = (byte)p2; + InvalidateWindow(WC_VEHICLE_DETAILS, v->index); + } + } + } while ( (v=v->next) != NULL); + + _returned_refit_amount = num; + + return cost; +} + +int GetDepotByTile(uint tile) +{ + Depot *d; + int i=0; + for(d=_depots; d->xy != (TileIndex)tile; d++) { i++; } + return i; +} + +typedef struct TrainFindDepotData { + uint best_length; + uint tile; + byte owner; +} TrainFindDepotData; + +static bool TrainFindDepotEnumProc(uint tile, TrainFindDepotData *tfdd, int track, uint length, byte *state) +{ + if (IS_TILETYPE(tile, MP_RAILWAY) && _map_owner[tile] == tfdd->owner) { + if ((_map5[tile] & ~0x3) == 0xC0) { + if (length < tfdd->best_length) { + tfdd->best_length = length; + tfdd->tile = tile; + } + return true; + } + + // make sure the train doesn't run against a oneway signal + if ((_map5[tile] & 0xC0) == 0x40) { + if (!(_map3_lo[tile] & _signal_onedir[track]) && _map3_lo[tile] & _signal_otherdir[track]) + return true; + } + } + + // stop searching if we've found a destination that is closer already. + return length >= tfdd->best_length; +} + +// returns the tile of a depot to goto to +static uint FindClosestTrainDepot(Vehicle *v) +{ + int i; + TrainFindDepotData tfdd; + uint tile = v->tile; + + if (IsTrainDepotTile(tile)) + return tile; + + if (v->u.rail.track == 0x40) { tile = GetVehicleOutOfTunnelTile(v); } + + tfdd.owner = v->owner; + tfdd.best_length = (uint)-1; + + if (!_patches.new_depot_finding) { + // search in all directions + for(i=0; i!=4; i++) + NewTrainPathfind(tile, i, (TPFEnumProc*)TrainFindDepotEnumProc, &tfdd, NULL); + if (tfdd.best_length != (uint)-1) + return tfdd.tile; + } else { + // search in the forward direction first. + i = v->direction >> 1; + if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[i]) { i = (i - 1) & 3; } + NewTrainPathfind(tile, i, (TPFEnumProc*)TrainFindDepotEnumProc, &tfdd, NULL); + if (tfdd.best_length != (uint)-1) + return tfdd.tile; + + // search in backwards direction + i = (v->direction^4) >> 1; + if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[i]) { i = (i - 1) & 3; } + NewTrainPathfind(tile, i, (TPFEnumProc*)TrainFindDepotEnumProc, &tfdd, NULL); + if (tfdd.best_length != (uint)-1) + return tfdd.tile; + } + + return (uint)-1; +} + +int32 CmdTrainGotoDepot(int x, int y, uint32 flags, uint32 p1, uint32 p2) +{ + Vehicle *v = &_vehicles[p1]; + uint depot_tile; + + if ((v->next_order & OT_MASK) == OT_GOTO_DEPOT) { + if (flags & DC_EXEC) { + if (v->next_order & OF_UNLOAD) { + v->u.rail.days_since_order_progr = 0; + v->cur_order_index++; + } + + v->next_order = OT_DUMMY; + InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4); + } + return 0; + } + + depot_tile = FindClosestTrainDepot(v); + if (depot_tile == (uint)-1) + return_cmd_error(STR_883A_UNABLE_TO_FIND_ROUTE_TO); + + if (flags & DC_EXEC) { + v->dest_tile = depot_tile; + v->next_order = OF_NON_STOP | OF_FULL_LOAD | OT_GOTO_DEPOT; + v->next_order_param = GetDepotByTile(depot_tile); + InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4); + } + + return 0; +} + +/* p1 = vehicle + * p2 = new service int + */ +int32 CmdChangeTrainServiceInt(int x, int y, uint32 flags, uint32 p1, uint32 p2) +{ + Vehicle *v = &_vehicles[p1]; + + if (!CheckOwnership(v->owner)) + return CMD_ERROR; + + if (flags & DC_EXEC) { + v->service_interval = (uint16)p2; + InvalidateWindowWidget(WC_VEHICLE_DETAILS, v->index, 8); + } + + return 0; +} + +void OnTick_Train() +{ + _age_cargo_skip_counter = (_age_cargo_skip_counter == 0) ? 184 : (_age_cargo_skip_counter - 1); +} + +static const int8 _vehicle_smoke_pos[16] = { + -4, -4, -4, 0, 4, 4, 4, 0, + -4, 0, 4, 4, 4, 0,-4,-4, +}; + +static void HandleLocomotiveSmokeCloud(Vehicle *v) +{ + Vehicle *u; + + if (v->vehstatus & VS_TRAIN_SLOWING || v->load_unload_time_rem != 0 || v->cur_speed < 2) + return; + + u = v; + + do { + int engtype = v->engine_type; + + // no smoke? + if (_rail_vehicle_info[engtype].flags & 2 + || _engines[engtype].railtype > 0 + || (v->vehstatus&VS_HIDDEN) || (v->u.rail.track & 0xC0) ) + continue; + + switch (_rail_vehicle_info[engtype].engclass) { + case 0: + // steam smoke. + if ( (v->tick_counter&0xF) == 0 && !IsTrainDepotTile(v->tile) && !IsTunnelTile(v->tile)) { + CreateEffectVehicleRel(v, + (_vehicle_smoke_pos[v->direction]), + (_vehicle_smoke_pos[v->direction+8]), + 10, + EV_STEAM_SMOKE); + } + break; + + case 1: + // diesel smoke + if (u->cur_speed <= 40 && !IsTrainDepotTile(v->tile) && !IsTunnelTile(v->tile) && (uint16)Random() <= 0x1E00) { + CreateEffectVehicleRel(v, 0,0,10, EV_SMOKE_3); + } + break; + + case 2: + // blue spark + if ( (v->tick_counter&0x3) == 0 && !IsTrainDepotTile(v->tile) && !IsTunnelTile(v->tile) && (uint16)Random() <= 0x5B0) { + CreateEffectVehicleRel(v, 0,0,10, EV_SMOKE_2); + } + break; + } + } while ( (v = v->next) != NULL ); + +} + +static void TrainPlayLeaveStationSound(Vehicle *v) +{ + static const byte sfx[3] = { 0x2, 0x8, 0x8 }; + int engtype = v->engine_type; + + switch (_engines[engtype].railtype) { + case 0: SndPlayVehicleFx(sfx[_rail_vehicle_info[engtype].engclass], v); break; + case 1: SndPlayVehicleFx(0x41, v); break; + case 2: SndPlayVehicleFx(0x47, v); break; + } +} + +static bool CheckTrainStayInDepot(Vehicle *v) +{ + Vehicle *u; + if (v->u.rail.track != 0x80) // first wagon (eg engine) in depot + return false; + + // make sure that all vehicles are in the depot + u = GetLastVehicleInChain(v); + if (u->u.rail.track != 0x80) + return false; + + // fix hung train if both ends are in depots (when here first wagon and last wagon is in depot) + // both first and last should be in the same depot, eg on the same tile + if (v->tile != u->tile) + return false; + + if (v->u.rail.force_proceed == 0) { + if (++v->load_unload_time_rem < 37) + return true; + v->load_unload_time_rem = 0; + + if (UpdateSignalsOnSegment(v->tile, v->direction)) + return true; + } + + TrainPlayLeaveStationSound(v); + + v->u.rail.track = 1; + if (v->direction & 2) + v->u.rail.track = 2; + + v->vehstatus &= ~VS_HIDDEN; + v->cur_speed = 0; + + UpdateTrainDeltaXY(v, v->direction); + v->cur_image = GetTrainImage(v, v->direction); + VehiclePositionChanged(v); + UpdateSignalsOnSegment(v->tile, v->direction); + UpdateTrainAcceleration(v); + InvalidateWindow(WC_VEHICLE_DEPOT, v->tile); + + return false; +} + +typedef struct TrainTrackFollowerData { + TileIndex dest_coords; + int station_index; // station index we're heading for + uint best_bird_dist; + uint best_track_dist; + byte best_track; +} TrainTrackFollowerData; + +static bool TrainTrackFollower(uint tile, TrainTrackFollowerData *ttfd, int track, uint length, byte *state){ + if (IS_TILETYPE(tile, MP_RAILWAY) && (_map5[tile]&0xC0) == 0x40) { + // the tile has a signal + byte m3 = _map3_lo[tile]; + if (!(m3 & _signal_onedir[track])) { + // if one way signal not pointing towards us, stop going in this direction. + if (m3 & _signal_otherdir[track]) + return true; + } else if (_map2[tile] & _signal_onedir[track]) { + // green signal in our direction. either one way or two way. + *state = true; + } else if (m3 & _signal_otherdir[track]) { + // two way signal. unless we passed another green signal on the way, + // stop going in this direction. + if (!*state) return true; + } + } + + // heading for nowhere? + if (ttfd->dest_coords == 0) + return false; + + // did we reach the final station? + if (tile == ttfd->dest_coords || + (IS_TILETYPE(tile, MP_STATION) && IS_BYTE_INSIDE(_map5[tile], 0, 8) && _map2[tile] == ttfd->station_index)) { + // found station + ttfd->best_bird_dist = 0; + if (length < ttfd->best_track_dist) { + ttfd->best_track_dist = length; + ttfd->best_track = state[1]; + } + return true; + } else { + uint dist; + + // we've actually found the destination already. no point searching in directions longer than this. + if (ttfd->best_track_dist != (uint)-1) + return length >= ttfd->best_track_dist; + + // didn't find station + dist = GetTileDist(tile, ttfd->dest_coords); + if (dist < ttfd->best_bird_dist) { + ttfd->best_bird_dist = dist; + ttfd->best_track = state[1]; + } + return false; + } +} + +static void FillWithStationData(TrainTrackFollowerData *fd, Vehicle *v) +{ + uint tile; + + fd->dest_coords = tile = v->dest_tile; + fd->station_index = -1; + + if (IS_TILETYPE(tile, MP_STATION) && IS_BYTE_INSIDE(_map5[tile], 0, 8) ) + fd->station_index = _map2[tile]; +} + +static const byte _initial_tile_subcoord[6][4][3] = { +{{ 15, 8, 1 },{ 0, 0, 0 },{ 0, 8, 5 },{ 0, 0, 0 }}, +{{ 0, 0, 0 },{ 8, 0, 3 },{ 0, 0, 0 },{ 8,15, 7 }}, +{{ 0, 0, 0 },{ 7, 0, 2 },{ 0, 7, 6 },{ 0, 0, 0 }}, +{{ 15, 8, 2 },{ 0, 0, 0 },{ 0, 0, 0 },{ 8,15, 6 }}, +{{ 15, 7, 0 },{ 8, 0, 4 },{ 0, 0, 0 },{ 0, 0, 0 }}, +{{ 0, 0, 0 },{ 0, 0, 0 },{ 0, 8, 4 },{ 7,15, 0 }}, +}; + +static const uint32 _reachable_tracks[4] = { + 0x10091009, + 0x00160016, + 0x05200520, + 0x2A002A00, +}; + +static const byte _search_directions[6][4] = { + { 0, 9, 2, 9 }, // track 1 + { 9, 1, 9, 3 }, // track 2 + { 9, 0, 3, 9 }, // track upper + { 1, 9, 9, 2 }, // track lower + { 3, 2, 9, 9 }, // track left + { 9, 9, 1, 0 }, // track right +}; + +static const byte _pick_track_table[6] = {1, 3, 2, 2, 0, 0}; + +/* choose a track */ +static byte ChooseTrainTrack(Vehicle *v, uint tile, int direction, byte trackbits) +{ + TrainTrackFollowerData fd; + int bits = trackbits; + uint best_track; +#if 0 + int time = rdtsc(); + static float f; +#endif + + assert( (bits & ~0x3F) == 0); + + /* quick return in case only one possible direction is available */ + if (KILL_FIRST_BIT(bits) == 0) + return FIND_FIRST_BIT(bits); + + FillWithStationData(&fd, v); + + if (_patches.new_pathfinding) { + fd.best_bird_dist = (uint)-1; + fd.best_track_dist = (uint)-1; + fd.best_track = 0xFF; + NewTrainPathfind(tile - _tileoffs_by_dir[direction], direction, (TPFEnumProc*)TrainTrackFollower, &fd, NULL); + +// printf("Train %d %s\n", v->unitnumber, fd.best_track_dist == -1 ? "NOTFOUND" : "FOUND"); + + if (fd.best_track == 0xff) { + // blaha + best_track = FIND_FIRST_BIT(bits); + } else { + best_track = fd.best_track & 7; + } + } else { + int i, r; + uint best_bird_dist = 0; + uint best_track_dist = 0; + byte train_dir = v->direction & 3; + + + best_track = -1; + + do { + i = FIND_FIRST_BIT(bits); + bits = KILL_FIRST_BIT(bits); + + fd.best_bird_dist = (uint)-1; + fd.best_track_dist = (uint)-1; + + NewTrainPathfind(tile, _search_directions[i][direction], (TPFEnumProc*)TrainTrackFollower, &fd, NULL); + if (best_track != -1) { + if (best_track_dist == -1) { + if (fd.best_track_dist == -1) { + /* neither reached the destination, pick the one with the smallest bird dist */ + if (fd.best_bird_dist > best_bird_dist) goto bad; + if (fd.best_bird_dist < best_bird_dist) goto good; + } else { + /* we found the destination for the first time */ + goto good; + } + } else { + if (fd.best_track_dist == -1) { + /* didn't find destination, but we've found the destination previously */ + goto bad; + } else { + /* both old & new reached the destination, compare track length */ + if (fd.best_track_dist > best_track_dist) goto bad; + if (fd.best_track_dist < best_track_dist) goto good; + } + } + + /* if we reach this position, there's two paths of equal value so far. + * pick one randomly. */ + r = (byte)Random(); + if (_pick_track_table[i] == train_dir) r += 80; + if (_pick_track_table[best_track] == train_dir) r -= 80; + + if (r <= 127) goto bad; + } + good:; + best_track = i; + best_bird_dist = fd.best_bird_dist; + best_track_dist = fd.best_track_dist; + bad:; + } while (bits != 0); +// printf("Train %d %s\n", v->unitnumber, best_track_dist == -1 ? "NOTFOUND" : "FOUND"); + assert(best_track != -1); + } + +#if 0 + time = rdtsc() - time; + f = f * 0.99 + 0.01 * time; + printf("PF time = %d %f\n", time, f); +#endif + + return best_track; +} + + +static bool CheckReverseTrain(Vehicle *v) +{ + TrainTrackFollowerData fd; + int i, r; + int best_track; + uint best_bird_dist = 0; + uint best_track_dist = 0; + uint reverse, reverse_best; + + if (_opt.diff.line_reverse_mode != 0 || + v->u.rail.track & 0xC0 || + !(v->direction & 1)) + return false; + + FillWithStationData(&fd, v); + + best_track = -1; + reverse_best = reverse = 0; + + assert(v->u.rail.track); + + i = _search_directions[FIND_FIRST_BIT(v->u.rail.track)][v->direction>>1]; + + while(true) { + fd.best_bird_dist = (uint)-1; + fd.best_track_dist = (uint)-1; + + NewTrainPathfind(v->tile, reverse ^ i, (TPFEnumProc*)TrainTrackFollower, &fd, NULL); + + if (best_track != -1) { + if (best_bird_dist != 0) { + if (fd.best_bird_dist != 0) { + /* neither reached the destination, pick the one with the smallest bird dist */ + if (fd.best_bird_dist > best_bird_dist) goto bad; + if (fd.best_bird_dist < best_bird_dist) goto good; + } else { + /* we found the destination for the first time */ + goto good; + } + } else { + if (fd.best_bird_dist != 0) { + /* didn't find destination, but we've found the destination previously */ + goto bad; + } else { + /* both old & new reached the destination, compare track length */ + if (fd.best_track_dist > best_track_dist) goto bad; + if (fd.best_track_dist < best_track_dist) goto good; + } + } + + /* if we reach this position, there's two paths of equal value so far. + * pick one randomly. */ + r = (byte)Random(); + if (_pick_track_table[i] == (v->direction & 3)) r += 80; + if (_pick_track_table[best_track] == (v->direction & 3)) r -= 80; + if (r <= 127) goto bad; + } +good:; + best_track = i; + best_bird_dist = fd.best_bird_dist; + best_track_dist = fd.best_track_dist; + reverse_best = reverse; +bad:; + if (reverse != 0) + break; + reverse = 2; + } + + return reverse_best != 0; +} + +static bool ProcessTrainOrder(Vehicle *v) +{ + uint order; + bool result; + + // These are un-interruptible + if ((v->next_order & OT_MASK) >= OT_GOTO_DEPOT && (v->next_order & OT_MASK) <= OT_LEAVESTATION) { + + // Let a depot order in the schedule interrupt. + if ((v->next_order & (OT_MASK|OF_UNLOAD)) != (OT_GOTO_DEPOT|OF_UNLOAD)) + return false; + } + + if ((v->next_order & (OT_MASK|OF_UNLOAD|OF_FULL_LOAD)) == (OT_GOTO_DEPOT|OF_UNLOAD|OF_FULL_LOAD) && + v->date_of_last_service+v->service_interval > _date) { + v->cur_order_index++; + } + + // check if we've reached the checkpoint? + if ((v->next_order & OT_MASK) == OT_GOTO_CHECKPOINT && v->tile == v->dest_tile) { + v->cur_order_index++; + } + + // check if we've reached a non-stop station while TTDPatch nonstop is enabled.. + if (_patches.new_nonstop && (v->next_order & OF_NON_STOP) && v->next_order_param == _map2[v->tile]) { + v->cur_order_index++; + } + + // Get the current order + if (v->cur_order_index >= v->num_orders) + v->cur_order_index = 0; + order = v->schedule_ptr[v->cur_order_index]; + + // If no order, do nothing. + if (order == 0) { + v->next_order = OT_NOTHING; + v->dest_tile = 0; + return false; + } + + // If it is unchanged, keep it. + if (order == (uint)((v->next_order | (v->next_order_param<<8)))) + return false; + + // Otherwise set it, and determine the destination tile. + v->next_order = (byte)order; + v->next_order_param = (byte)(order >> 8); + + v->dest_tile = 0; + + result = false; + if ((order & OT_MASK) == OT_GOTO_STATION) { + if ( (byte)(order >> 8) == v->last_station_visited) + v->last_station_visited = 0xFF; + v->dest_tile = DEREF_STATION(order >> 8)->xy; + result = CheckReverseTrain(v); + } else if ((order & OT_MASK) == OT_GOTO_DEPOT) { + v->dest_tile = _depots[order >> 8].xy; + result = CheckReverseTrain(v); + } else if ((order & OT_MASK) == OT_GOTO_CHECKPOINT) { + v->dest_tile = _checkpoints[order >> 8].xy; + result = CheckReverseTrain(v); + } + + InvalidateVehicleOrderWidget(v); + + return result; +} + +static void MarkTrainDirty(Vehicle *v) +{ + do { + v->cur_image = GetTrainImage(v, v->direction); + MarkAllViewportsDirty(v->left_coord, v->top_coord, v->right_coord + 1, v->bottom_coord + 1); + } while ( (v=v->next) != NULL); +} + +static void HandleTrainLoading(Vehicle *v, bool mode) +{ + if (v->next_order == OT_NOTHING) + return; + + if (v->next_order != OT_DUMMY) { + if ((v->next_order&OT_MASK) != OT_LOADING) + return; + + if (mode) + return; + + // don't mark the train as lost if we're loading on the final station. + if (v->next_order & OF_NON_STOP) + v->u.rail.days_since_order_progr = 0; + + if (--v->load_unload_time_rem) + return; + + if (v->next_order&OF_FULL_LOAD && CanFillVehicle(v)) { + SET_EXPENSES_TYPE(EXPENSES_TRAIN_INC); + if (LoadUnloadVehicle(v)) { + InvalidateWindow(WC_TRAINS_LIST, v->owner); + MarkTrainDirty(v); + + // need to update acceleration since the goods on the train changed. + UpdateTrainAcceleration(v); + } + return; + } + + TrainPlayLeaveStationSound(v); + + { + byte b = v->next_order; + v->next_order = OT_LEAVESTATION; + + // If this was not the final order, don't remove it from the list. + if (!(b & OF_NON_STOP)) + return; + } + } + + v->u.rail.days_since_order_progr = 0; + v->cur_order_index++; + InvalidateVehicleOrderWidget(v); +} + +static int UpdateTrainSpeed(Vehicle *v) +{ + uint spd; + uint accel; + + if (v->vehstatus & VS_STOPPED || v->u.rail.flags & VRF_REVERSING) { + accel = -v->acceleration * 2; + } else { + accel = v->acceleration; + if (_patches.realistic_acceleration) { + accel = GetRealisticAcceleration(v); + } + } + + spd = v->subspeed + accel * 2; + v->subspeed = (byte)spd; + v->cur_speed = spd = clamp(v->cur_speed + ((int)spd >> 8), 0, v->max_speed); + + if (!(v->direction & 1)) spd = spd * 3 >> 2; + + spd += v->progress; + v->progress = (byte)spd; + return (spd >> 8); +} + +static void TrainEnterStation(Vehicle *v, int station) +{ + Station *st; + uint32 flags; + + v->last_station_visited = station; + + /* check if a train ever visited this station before */ + st = DEREF_STATION(station); + if (!(st->had_vehicle_of_type & HVOT_TRAIN)) { + st->had_vehicle_of_type |= HVOT_TRAIN; + SET_DPARAM16(0, st->index); + 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); + AddNewsItem( + STR_8801_CITIZENS_CELEBRATE_FIRST, + flags, + v->index, + 0); + } + + // Did we reach the final destination? + if ((v->next_order&OT_MASK) == OT_GOTO_STATION && v->next_order_param == (byte)station) { + // Yeah, keep the load/unload flags + // Non Stop now means if the order should be increased. + v->next_order = (v->next_order & (OF_FULL_LOAD|OF_UNLOAD)) | OF_NON_STOP | OT_LOADING; + } else { + // No, just do a simple load + v->next_order = OT_LOADING; + } + v->next_order_param = 0; + + SET_EXPENSES_TYPE(EXPENSES_TRAIN_INC); + if (LoadUnloadVehicle(v) != 0) { + InvalidateWindow(WC_TRAINS_LIST, v->owner); + MarkTrainDirty(v); + UpdateTrainAcceleration(v); + } + InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4); +} + +static byte AfterSetTrainPos(Vehicle *v) +{ + byte new_z, old_z; + + // need this hint so it returns the right z coordinate on bridges. + _get_z_hint = v->z_pos; + new_z = GetSlopeZ(v->x_pos, v->y_pos); + _get_z_hint = 0; + + old_z = v->z_pos; + v->z_pos = new_z; + + v->u.rail.flags &= ~(VRF_GOINGUP | VRF_GOINGDOWN); + + if (new_z != old_z) { + v->u.rail.flags |= (new_z > old_z) ? VRF_GOINGUP : VRF_GOINGDOWN; + } + + VehiclePositionChanged(v); + EndVehicleMove(v); + return old_z; +} + +static const byte _new_vehicle_direction_table[11] = { + 0, 7, 6, 0, + 1, 0, 5, 0, + 2, 3, 4, +}; + +static int GetNewVehicleDirectionByTile(uint new_tile, uint old_tile) +{ + uint offs = (GET_TILE_Y(new_tile) - GET_TILE_Y(old_tile) + 1) * 4 + + GET_TILE_X(new_tile) - GET_TILE_X(old_tile) + 1; + assert(offs < 11); + return _new_vehicle_direction_table[offs]; +} + +static int GetNewVehicleDirection(Vehicle *v, int x, int y) +{ + uint offs = (y - v->y_pos + 1) * 4 + (x - v->x_pos + 1); + assert(offs < 11); + return _new_vehicle_direction_table[offs]; +} + +static int GetDirectionToVehicle(Vehicle *v, int x, int y) +{ + byte offs; + + x -= v->x_pos; + if (x >= 0) { + offs = (x > 2) ? 0 : 1; + } else { + offs = (x < -2) ? 2 : 1; + } + + y -= v->y_pos; + if (y >= 0) { + offs += ((y > 2) ? 0 : 1) * 4; + } else { + offs += ((y < -2) ? 2 : 1) * 4; + } + + assert(offs < 11); + return _new_vehicle_direction_table[offs]; +} + +/* Check if the vehicle is compatible with the specified tile */ +static bool CheckCompatibleRail(Vehicle *v, uint tile) +{ + if (IS_TILETYPE(tile, MP_RAILWAY) || + IS_TILETYPE(tile, MP_STATION)) { + + } else if (IS_TILETYPE(tile, MP_TUNNELBRIDGE)) { + if ((_map5[tile] & 0xC0) == 0xC0) {// is bridge middle part? + TileInfo ti; + FindLandscapeHeightByTile(&ti, tile); + + // correct Z position of a train going under a bridge on slopes + if (CORRECT_Z(ti.tileh)) + ti.z += 8; + + if(v->z_pos != ti.z) // train is going over bridge + return true; + } + } else + return true; + + if (_map_owner[tile] != v->owner || + (v->subtype == 0 && (_map3_lo[tile] & 0xF) != v->u.rail.railtype)) + return false; + + return true; +} + +typedef struct { + byte small_turn, large_turn; + byte z_up; // fraction to remove when moving up + byte z_down; // fraction to remove when moving down +} RailtypeSlowdownParams; + +static const RailtypeSlowdownParams _railtype_slowdown[3] = { + // normal accel + {256/4, 256/2, 256/4, 2}, // normal + {256/4, 256/2, 256/4, 2}, // monorail + {0, 256/2, 256/4, 2}, // maglev +}; + +/* Modify the speed of the vehicle due to a turn */ +static void AffectSpeedByDirChange(Vehicle *v, byte new_dir) +{ + byte diff; + const RailtypeSlowdownParams *rsp; + + if (_patches.realistic_acceleration || (diff = (v->direction - new_dir) & 7) == 0) + return; + + rsp = &_railtype_slowdown[v->u.rail.railtype]; + v->cur_speed -= ((diff == 1 || diff == 7) ? rsp->small_turn : rsp->large_turn) * v->cur_speed >> 8; +} + +/* Modify the speed of the vehicle due to a change in altitude */ +static void AffectSpeedByZChange(Vehicle *v, byte old_z) +{ + const RailtypeSlowdownParams *rsp; + if (old_z == v->z_pos || _patches.realistic_acceleration) + return; + + rsp = &_railtype_slowdown[v->u.rail.railtype]; + + if (old_z < v->z_pos) { + v->cur_speed -= (v->cur_speed * rsp->z_up >> 8); + } else { + uint16 spd = v->cur_speed + rsp->z_down; + if (spd <= v->max_speed) + v->cur_speed = spd; + } +} + +static const byte _otherside_signal_directions[14] = { + 1, 3, 1, 3, 5, 3, 0, 0, + 5, 7, 7, 5, 7, 1, +}; + +static void TrainMovedChangeSignals(uint tile, int dir) +{ + int i; + if (IS_TILETYPE(tile, MP_RAILWAY) && (_map5[tile]&0xC0)==0x40) { + i = FindFirstBit2x64((_map5[tile]+(_map5[tile]<<8)) & _reachable_tracks[dir]); + UpdateSignalsOnSegment(tile, _otherside_signal_directions[i]); + } +} + + +typedef struct TrainCollideChecker { + Vehicle *v, *v_skip; + +} TrainCollideChecker; + +void *FindTrainCollideEnum(Vehicle *v, TrainCollideChecker *tcc) +{ + if (v == tcc->v || v == tcc->v_skip || v->type != VEH_Train || v->u.rail.track==0x80) + return 0; + + if ( myabs(v->z_pos - tcc->v->z_pos) > 6 || + myabs(v->x_pos - tcc->v->x_pos) >= 6 || + myabs(v->y_pos - tcc->v->y_pos) >= 6) + return NULL; + return v; +} + +static void SetVehicleCrashed(Vehicle *v) +{ + Vehicle *u; + + if (v->u.rail.crash_anim_pos != 0) + return; + + v->u.rail.crash_anim_pos++; + + u = v; + BEGIN_ENUM_WAGONS(v) + v->vehstatus |= VS_CRASHED; + END_ENUM_WAGONS(v) + + InvalidateWindowWidget(WC_VEHICLE_VIEW, u->index, 4); +} + +static int CountPassengersInTrain(Vehicle *v) +{ + int num = 0; + BEGIN_ENUM_WAGONS(v) + if (v->cargo_type == 0) num += v->cargo_count; + END_ENUM_WAGONS(v) + return num; +} + +static void CheckTrainCollision(Vehicle *v) +{ + TrainCollideChecker tcc; + Vehicle *coll; + int num; + + /* can't collide in depot */ + if (v->u.rail.track == 0x80) + return; + + assert((uint)TILE_FROM_XY(v->x_pos, v->y_pos) == v->tile); + + tcc.v = v; + tcc.v_skip = v->next; + + /* find colliding vehicle */ + coll = VehicleFromPos(v->tile, &tcc, (VehicleFromPosProc*)FindTrainCollideEnum); + if (coll == NULL) + return; + + coll = GetFirstVehicleInChain(coll); + + /* it can't collide with its own wagons */ + if (v == coll) + return; + + //two drivers + passangers killed in train v + num = 2 + CountPassengersInTrain(v); + if(!(coll->vehstatus&VS_CRASHED)) + //two drivers + passangers killed in train coll (if it was not crashed already) + num += 2 + CountPassengersInTrain(coll); + + SetVehicleCrashed(v); + if (coll->subtype == 0) + SetVehicleCrashed(coll); + + + SET_DPARAM16(0, num); + + AddNewsItem(STR_8868_TRAIN_CRASH_DIE_IN_FIREBALL, + NEWS_FLAGS(NM_THIN, NF_VIEWPORT|NF_VEHICLE, NT_ACCIDENT, 0), + v->index, + 0); + + ModifyStationRatingAround(v->tile, v->owner, -160, 30); + SndPlayVehicleFx(17, v); +} + +static void *CheckVehicleAtSignal(Vehicle *v, void *data) +{ + uint32 d = (uint32)data; + + if (v->type == VEH_Train && v->subtype == 0 && v->tile == (TileIndex)(d >> 8)) { + byte diff = (v->direction - (byte)d + 2) & 7; + if (diff == 2 || (v->cur_speed <= 5 && diff <= 4)) + return (void*)1; + } + return 0; +} + +static void TrainController(Vehicle *v) +{ + Vehicle *prev = NULL; + GetNewVehiclePosResult gp; + uint32 r, tracks,ts; + int dir, i; + byte chosen_dir; + byte chosen_track; + byte old_z; + + for(;;) { + BeginVehicleMove(v); + + if (v->u.rail.track != 0x40) { + if (GetNewVehiclePos(v, &gp)) { + /* Statying in the old tile */ + if (v->u.rail.track == 0x80) { + /* inside depot */ + gp.x = v->x_pos; + gp.y = v->y_pos; + } else { + /* isnot inside depot */ + r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y); + if (r & 0x8) + goto invalid_rail; + if (r & 0x2) { + TrainEnterStation(v, r >> 8); + return; + } + + if (v->next_order == OT_LEAVESTATION) { + v->next_order = OT_NOTHING; + InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4); + } + } + } else { + /* A new tile is about to be entered. */ + + /* Determine what direction we're entering the new tile from */ + dir = GetNewVehicleDirectionByTile(gp.new_tile, gp.old_tile); + assert(dir==1 || dir==3 || dir==5 || dir==7); + + /* Get the status of the tracks in the new tile and mask + * away the bits that aren't reachable. */ + ts = GetTileTrackStatus(gp.new_tile, 0) & _reachable_tracks[dir >> 1]; + + /* Combine the from & to directions. + * Now, the lower byte contains the track status, and the byte at bit 16 contains + * the signal status. */ + tracks = ts|(ts >> 8); + if ( (byte) tracks == 0) + goto invalid_rail; + + /* Check if the new tile contrains tracks that are compatible + * with the current train, if not, bail out. */ + if (!CheckCompatibleRail(v, gp.new_tile)) + goto invalid_rail; + + if (prev == NULL) { + /* Currently the locomotive is active. Determine which one of the + * available tracks to choose */ + chosen_track = 1 << ChooseTrainTrack(v, gp.new_tile, dir>>1, (byte)tracks); + + /* Check if it's a red signal and that force proceed is not clicked. */ + if ( (tracks>>16)&chosen_track && v->u.rail.force_proceed == 0) goto red_light; + } else { + static byte _matching_tracks[8] = {0x30, 1, 0xC, 2, 0x30, 1, 0xC, 2}; + + /* The wagon is active, simply follow the prev vehicle. */ + chosen_track = (byte)(_matching_tracks[GetDirectionToVehicle(prev, gp.x, gp.y)] & tracks); + } + + /* make sure chosen track is a valid track */ + assert(chosen_track==1 || chosen_track==2 || chosen_track==4 || chosen_track==8 || chosen_track==16 || chosen_track==32); + + /* Update XY to reflect the entrance to the new tile, and select the direction to use */ + { + const byte *b = _initial_tile_subcoord[FIND_FIRST_BIT(chosen_track)][dir>>1]; + gp.x = (gp.x & ~0xF) | b[0]; + gp.y = (gp.y & ~0xF) | b[1]; + chosen_dir = b[2]; + } + + /* Call the landscape function and tell it that the vehicle entered the tile */ + r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y); + if (r&0x8) + goto invalid_rail; + + if (v->subtype == 0) v->load_unload_time_rem = 0; + + if (!(r&0x4)) { + v->tile = gp.new_tile; + v->u.rail.track = chosen_track; + } + + if (v->subtype == 0) + TrainMovedChangeSignals(gp.new_tile, dir>>1); + + if (v->next == NULL) + TrainMovedChangeSignals(gp.old_tile, (dir>>1) ^ 2); + + if (prev == NULL) { + AffectSpeedByDirChange(v, chosen_dir); + } + + v->direction = chosen_dir; + } + } else { + /* in tunnel */ + GetNewVehiclePos(v, &gp); + + if (IS_TILETYPE(gp.new_tile, MP_TUNNELBRIDGE) && + !(_map5[gp.new_tile] & 0xF0)) { + r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y); + if (r & 0x4) goto common; + } + + v->x_pos = gp.x; + v->y_pos = gp.y; + VehiclePositionChanged(v); + goto next_vehicle; + } +common:; + + /* update image of train, as well as delta XY */ + dir = GetNewVehicleDirection(v, gp.x, gp.y); + UpdateTrainDeltaXY(v, dir); + v->cur_image = GetTrainImage(v, dir); + + v->x_pos = gp.x; + v->y_pos = gp.y; + + /* update the Z position of the vehicle */ + old_z = AfterSetTrainPos(v); + + if (prev == NULL) { + AffectSpeedByZChange(v, old_z); + CheckTrainCollision(v); + } + + /* continue with next vehicle */ +next_vehicle:; + prev = v; + if ((v=v->next) == NULL) + return; + } + +invalid_rail: + if (prev != NULL) { + error("!Disconnecting train"); + } + goto reverse_train_direction; + +red_light: { + /* find the first set bit in ts. need to do it in 2 steps, since + * FIND_FIRST_BIT only handles 6 bits at a time. */ + i = FindFirstBit2x64(ts); + + if (!(_map3_lo[gp.new_tile] & _signal_otherdir[i])) { + v->cur_speed = 0; + v->subspeed = 0; + v->progress = 255-100; + if (++v->load_unload_time_rem < _patches.wait_oneway_signal * 20) + return; + } else if (_map3_lo[gp.new_tile] & _signal_onedir[i]){ + v->cur_speed = 0; + v->subspeed = 0; + v->progress = 255-10; + if (++v->load_unload_time_rem < _patches.wait_twoway_signal * 73) { + uint o_tile = gp.new_tile + _tileoffs_by_dir[dir>>1]; + /* check if a train is waiting on the other side */ + if (VehicleFromPos(o_tile, (void*)( (o_tile<<8) | (dir^4)), (VehicleFromPosProc*)CheckVehicleAtSignal) == NULL) + return; + } + } + } + +reverse_train_direction: + v->load_unload_time_rem = 0; + v->cur_speed = 0; + v->subspeed = 0; + ReverseTrainDirection(v); + +} + +static void DeleteLastWagon(Vehicle *v) +{ + Vehicle *u = v; + int t; + + while (v->next != NULL) { + u = v; + v = v->next; + } + u->next = NULL; + + InvalidateWindow(WC_VEHICLE_DETAILS, v->index); + DeleteWindowById(WC_VEHICLE_VIEW, v->index); + InvalidateWindow(WC_TRAINS_LIST, v->owner); + InvalidateWindow(WC_COMPANY, v->owner); + + BeginVehicleMove(v); + EndVehicleMove(v); + DeleteVehicle(v); + + if (!((t=v->u.rail.track) & 0xC0)) { + SetSignalsOnBothDir(v->tile, FIND_FIRST_BIT(t)); + } +} + +static void ChangeTrainDirRandomly(Vehicle *v) +{ + static int8 _random_dir_change[4] = { -1, 0, 0, 1}; + + do { + v->direction = (v->direction + _random_dir_change[Random()&3]) & 7; + if (!(v->vehstatus & VS_HIDDEN)) { + BeginVehicleMove(v); + UpdateTrainDeltaXY(v, v->direction); + v->cur_image = GetTrainImage(v, v->direction); + AfterSetTrainPos(v); + } + } while ( (v=v->next) != NULL); +} + +static void HandleCrashedTrain(Vehicle *v) +{ + int state = ++v->u.rail.crash_anim_pos, index; + uint32 r; + Vehicle *u; + + if (state == 4) { + CreateEffectVehicleRel(v, 4, 4, 8, EV_CRASHED_SMOKE); + } + + if (state <= 200 && (uint16)(r=Random()) <= 0x2492) { + index = (r * 10 >> 16); + + u = v; + do { + if (--index < 0) { + r = Random(); + + CreateEffectVehicleRel(u, + 2 + ((r>>8)&7), + 2 + ((r>>16)&7), + 5 + (r&7), + EV_DEMOLISH); + break; + } + } while ( (u=u->next) != NULL); + } + + if (state <= 240 && !(v->tick_counter&3)) { + ChangeTrainDirRandomly(v); + } + + if (state >= 4440 && !(v->tick_counter&0x1F)) + DeleteLastWagon(v); +} + +static void HandleBrokenTrain(Vehicle *v) +{ + if (v->breakdown_ctr != 1) { + v->breakdown_ctr = 1; + v->cur_speed = 0; + + if (v->breakdowns_since_last_service != 255) + v->breakdowns_since_last_service++; + + InvalidateWindow(WC_VEHICLE_VIEW, v->index); + InvalidateWindow(WC_VEHICLE_DETAILS, v->index); + + SndPlayVehicleFx((_opt.landscape != LT_CANDY) ? 0xE : 0x3A, v); + + if (!(v->vehstatus & VS_HIDDEN)) { + Vehicle *u = CreateEffectVehicleRel(v, 4, 4, 5, EV_BREAKDOWN_SMOKE); + if (u) + u->u.special.unk0 = v->breakdown_delay * 2; + } + } + + if (!(v->tick_counter & 3)) { + if (!--v->breakdown_delay) { + v->breakdown_ctr = 0; + InvalidateWindow(WC_VEHICLE_VIEW, v->index); + } + } +} + +static const byte _breakdown_speeds[16] = { + 225, 210, 195, 180, 165, 150, 135, 120, 105, 90, 75, 60, 45, 30, 15, 15 +}; + +static void TrainCheckIfLineEnds(Vehicle *v) +{ + uint tile; + uint x,y; + int t; + uint32 ts; + + if ((uint)(t=v->breakdown_ctr) > 1) { + v->vehstatus |= VS_TRAIN_SLOWING; + + t = _breakdown_speeds[ ((~t) >> 4) & 0xF]; + if ((uint16)t <= v->cur_speed) + v->cur_speed = t; + } else { + v->vehstatus &= ~VS_TRAIN_SLOWING; + } + + // exit if inside a tunnel + if (v->u.rail.track & 0x40) + return; + + tile = v->tile; + + // tunnel entrance? + if (IS_TILETYPE(tile, MP_TUNNELBRIDGE) && + (_map5[tile] & 0xF0) == 0 && (byte)((_map5[tile] & 3)*2+1) == v->direction) + return; + + // depot? + if (IS_TILETYPE(tile, MP_RAILWAY) && (_map5[tile] & 0xFC) == 0xC0) + return; + + // determine the tracks on the next tile. + t = v->direction >> 1; + if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[t]) { + t = (t - 1) & 3; + } + tile += _tileoffs_by_dir[t]; + ts = GetTileTrackStatus(tile, 0) & _reachable_tracks[t]; + + x = v->x_pos & 0xF; + y = v->y_pos & 0xF; + + switch(v->direction) { + case 0: + x = (~x) + (~y) + 24; + break; + case 7: + x = y; + /* fall through */ + case 1: + x = (~x) + 16; + break; + case 2: + x = (~x) + y + 8; + break; + case 3: + x = y; + break; + case 4: + x = x + y - 8; + break; + case 6: + x = (~y) + x + 8; + break; + } + + if ( (uint16)ts != 0) { + if ((ts &= (ts >> 16)) == 0) { + // make a rail/road crossing red + if (IS_TILETYPE(tile, MP_STREET) && (_map5[tile] & 0xF0)==0x10) { + if (!(_map5[tile] & 4)) { + _map5[tile] |= 4; + SndPlayVehicleFx(12, v); + MarkTileDirtyByTile(tile); + } + } + return; + } + } else if (x + 4 > 15) { + v->cur_speed = 0; + ReverseTrainDirection(v); + return; + } + + // slow down + v->vehstatus |= VS_TRAIN_SLOWING; + t = _breakdown_speeds[x & 0xF]; + if (!(v->direction&1)) t>>=1; + if ((uint16)t < v->cur_speed) + v->cur_speed = t; +} + +static void TrainLocoHandler(Vehicle *v, bool mode) +{ + int j; + + /* train has crashed? */ + if (v->u.rail.crash_anim_pos != 0) { + if (!mode) HandleCrashedTrain(v); + return; + } + + if (v->u.rail.force_proceed != 0) + v->u.rail.force_proceed--; + + /* train is broken down? */ + if (v->breakdown_ctr != 0) { + if (v->breakdown_ctr <= 2) { + HandleBrokenTrain(v); + return; + } + v->breakdown_ctr--; + } + + if (v->u.rail.flags & VRF_REVERSING && v->cur_speed == 0) { + ReverseTrainDirection(v); + } + + /* exit if train is stopped */ + if (v->vehstatus & VS_STOPPED && v->cur_speed == 0) + return; + + + if (ProcessTrainOrder(v)) { + v->load_unload_time_rem = 0; + v->cur_speed = 0; + v->subspeed = 0; + ReverseTrainDirection(v); + return; + } + + HandleTrainLoading(v, mode); + + if ((v->next_order & OT_MASK) == OT_LOADING) + return; + + if (CheckTrainStayInDepot(v)) + return; + + if (!mode) HandleLocomotiveSmokeCloud(v); + + j = UpdateTrainSpeed(v); + if (j == 0) { + // if the vehicle has speed 0, update the last_speed field. + if (v->cur_speed != 0) + return; + } else { + TrainCheckIfLineEnds(v); + + do { + TrainController(v); + if (v->cur_speed <= 0x100) + break; + } while (--j != 0); + } + + SetLastSpeed(v, v->cur_speed); +} + + +void Train_Tick(Vehicle *v) +{ + if (_age_cargo_skip_counter == 0 && v->cargo_days != 0xff) + v->cargo_days++; + + v->tick_counter++; + + if (v->subtype == 0) { + TrainLocoHandler(v, false); + + // make sure vehicle wasn't deleted. + if (v->type == VEH_Train && v->subtype == 0) + TrainLocoHandler(v, true); + } +} + + +static const byte _depot_track_ind[4] = {0,1,0,1}; + +void TrainEnterDepot(Vehicle *v, uint tile) +{ + byte t; + + SetSignalsOnBothDir(tile, _depot_track_ind[_map5[tile]&3]); + + if (v->subtype != 0) + v = GetFirstVehicleInChain(v); + + v->date_of_last_service = _date; + v->breakdowns_since_last_service = 0; + v->reliability = _engines[v->engine_type].reliability; + InvalidateWindow(WC_VEHICLE_DETAILS, v->index); + + v->load_unload_time_rem = 0; + v->cur_speed = 0; + + MaybeRenewVehicle(v, EstimateTrainCost(&_rail_vehicle_info[v->engine_type])); + + if ((v->next_order&OT_MASK) == OT_GOTO_DEPOT) { + InvalidateWindow(WC_VEHICLE_VIEW, v->index); + + t = v->next_order; + v->next_order = OT_DUMMY; + + // Part of the schedule? + if (t & OF_UNLOAD) { v->u.rail.days_since_order_progr = 0; v->cur_order_index++; } + + // User initiated? + else if (t & OF_FULL_LOAD) { + v->vehstatus |= VS_STOPPED; + if (v->owner == _local_player) { + SET_DPARAM16(0, v->unitnumber); + AddNewsItem( + STR_8814_TRAIN_IS_WAITING_IN_DEPOT, + NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0), + v->index, + 0); + } + } + } +} + +static void CheckIfTrainNeedsService(Vehicle *v) +{ + uint tile; + byte depot; + + if (_patches.no_train_service && IS_HUMAN_PLAYER(v->owner)) + return; + + if (v->date_of_last_service + v->service_interval > _date) + return; + + if (v->vehstatus & VS_STOPPED) + return; + + if (_patches.gotodepot && IS_HUMAN_PLAYER(v->owner) && ScheduleHasDepotOrders(v->schedule_ptr)) + return; + + // Don't interfere with a depot visit scheduled by the user, or a + // depot visit by the order list. + if ((v->next_order & OT_MASK) == OT_GOTO_DEPOT && + (v->next_order & (OF_FULL_LOAD|OF_UNLOAD)) != 0) + return; + + tile = FindClosestTrainDepot(v); + if (tile == (uint)-1 || GetTileDist(v->tile, tile) > 12) { + if ((v->next_order & OT_MASK) == OT_GOTO_DEPOT) { + v->next_order = OT_DUMMY; + InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4); + } + return; + } + + depot = GetDepotByTile(tile); + + if ((v->next_order & OT_MASK) == OT_GOTO_DEPOT && v->next_order_param != depot && !CHANCE16(3,16)) + return; + + v->next_order = OT_GOTO_DEPOT | OF_NON_STOP; + v->next_order_param = depot; + v->dest_tile = tile; + InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, 4); +} + +int32 GetTrainRunningCost(Vehicle *v) +{ + int32 cost = 0; + + do { + const RailVehicleInfo *rvi = &_rail_vehicle_info[v->engine_type]; + if (rvi->running_cost_base) + cost += rvi->running_cost_base * _price.running_rail[rvi->engclass]; + } while ( (v=v->next) != NULL ); + + return cost; +} + +void OnNewDay_Train(Vehicle *v) +{ + TileIndex tile; + + if ((++v->day_counter & 7) == 0) + DecreaseVehicleValue(v); + + if (v->subtype == 0) { + CheckVehicleBreakdown(v); + AgeVehicle(v); + + CheckIfTrainNeedsService(v); + + // check if train hasn't advanced in its order list for a set number of days + 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) { + v->u.rail.days_since_order_progr = 0; + SET_DPARAM16(0, v->unitnumber); + AddNewsItem( + STR_TRAIN_IS_LOST, + NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0), + v->index, + 0); + } + + /* update destination */ + if ((v->next_order & OT_MASK) == OT_GOTO_STATION && + (tile=DEREF_STATION(v->next_order_param)->train_tile) != 0) + v->dest_tile = tile; + + if ((v->vehstatus & VS_STOPPED) == 0) { + /* running costs */ + int32 cost = GetTrainRunningCost(v) / 364; + + v->profit_this_year -= cost >> 8; + + SET_EXPENSES_TYPE(EXPENSES_TRAIN_RUN); + SubtractMoneyFromPlayerFract(v->owner, cost); + + InvalidateWindow(WC_VEHICLE_DETAILS, v->index); + InvalidateWindow(WC_TRAINS_LIST, v->owner); + } + } +} + +void TrainsYearlyLoop() +{ + Vehicle *v; + + FOR_ALL_VEHICLES(v) { + if (v->type == VEH_Train && v->subtype == 0) { + + // show warning if train is not generating enough income last 2 years (corresponds to a red icon in the vehicle list) + if (_patches.train_income_warn && v->owner == _local_player && v->age >= 730 && v->profit_this_year < 0) { + SET_DPARAM32(1, v->profit_this_year); + SET_DPARAM16(0, v->unitnumber); + AddNewsItem( + STR_TRAIN_IS_UNPROFITABLE, + NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0), + v->index, + 0); + } + + v->profit_last_year = v->profit_this_year; + v->profit_this_year = 0; + InvalidateWindow(WC_VEHICLE_DETAILS, v->index); + } + } +} + +extern void ShowTrainViewWindow(Vehicle *v); + +void HandleClickOnTrain(Vehicle *v) +{ + if (v->subtype != 0) v = GetFirstVehicleInChain(v); + ShowTrainViewWindow(v); +} + +void InitializeTrains() +{ + _age_cargo_skip_counter = 1; +} + +int ScheduleHasDepotOrders(uint16 *schedule) +{ + for (;*schedule!=0;schedule++) + if ((*schedule&OT_MASK) == OT_GOTO_DEPOT) + return true; + return false; +} -- cgit v1.2.3-70-g09d2