/* $Id$ */ /** @file rail_cmd.cpp */ #include "stdafx.h" #include "openttd.h" #include "bridge_map.h" #include "bridge.h" #include "cmd_helper.h" #include "debug.h" #include "functions.h" #include "rail_map.h" #include "road_map.h" #include "table/sprites.h" #include "table/strings.h" #include "map.h" #include "landscape.h" #include "tile.h" #include "town_map.h" #include "tunnel_map.h" #include "vehicle.h" #include "viewport.h" #include "command.h" #include "pathfind.h" #include "engine.h" #include "town.h" #include "sound.h" #include "station.h" #include "sprite.h" #include "depot.h" #include "waypoint.h" #include "window.h" #include "rail.h" #include "railtypes.h" // include table for railtypes #include "newgrf.h" #include "yapf/yapf.h" #include "newgrf_callbacks.h" #include "newgrf_station.h" #include "train.h" const byte _track_sloped_sprites[14] = { 14, 15, 22, 13, 0, 21, 17, 12, 23, 0, 18, 20, 19, 16 }; /* 4 * --------- * |\ /| * | \ 1/ | * | \ / | * | \ / | * 16| \ |32 * | / \2 | * | / \ | * | / \ | * |/ \| * --------- * 8 */ /* MAP2 byte: abcd???? => Signal On? Same coding as map3lo * MAP3LO byte: abcd???? => Signal Exists? * a and b are for diagonals, upper and left, * one for each direction. (ie a == NE->SW, b == * SW->NE, or v.v., I don't know. b and c are * similar for lower and right. * MAP2 byte: ????abcd => Type of ground. * MAP3LO byte: ????abcd => Type of rail. * MAP5: 00abcdef => rail * 01abcdef => rail w/ signals * 10uuuuuu => unused * 11uuuudd => rail depot */ static bool CheckTrackCombination(TileIndex tile, TrackBits to_build, uint flags) { TrackBits current; // The current track layout TrackBits future; // The track layout we want to build _error_message = STR_1001_IMPOSSIBLE_TRACK_COMBINATION; if (!IsPlainRailTile(tile)) return false; /* So, we have a tile with tracks on it (and possibly signals). Let's see * what tracks first */ current = GetTrackBits(tile); future = current | to_build; /* Are we really building something new? */ if (current == future) { /* Nothing new is being built */ _error_message = STR_1007_ALREADY_BUILT; return false; } /* Let's see if we may build this */ if (flags & DC_NO_RAIL_OVERLAP || HasSignals(tile)) { /* If we are not allowed to overlap (flag is on for ai players or we have * signals on the tile), check that */ return future == TRACK_BIT_HORZ || future == TRACK_BIT_VERT; } else { /* Normally, we may overlap and any combination is valid */ return true; } } static const TrackBits _valid_tileh_slopes[][15] = { /* set of normal ones */ { TRACK_BIT_ALL, TRACK_BIT_RIGHT, TRACK_BIT_UPPER, TRACK_BIT_X, TRACK_BIT_LEFT, TRACK_BIT_NONE, TRACK_BIT_Y, TRACK_BIT_LOWER, TRACK_BIT_LOWER, TRACK_BIT_Y, TRACK_BIT_NONE, TRACK_BIT_LEFT, TRACK_BIT_X, TRACK_BIT_UPPER, TRACK_BIT_RIGHT, }, /* allowed rail for an evenly raised platform */ { TRACK_BIT_NONE, TRACK_BIT_LEFT, TRACK_BIT_LOWER, TRACK_BIT_Y | TRACK_BIT_LOWER | TRACK_BIT_LEFT, TRACK_BIT_RIGHT, TRACK_BIT_ALL, TRACK_BIT_X | TRACK_BIT_LOWER | TRACK_BIT_RIGHT, TRACK_BIT_ALL, TRACK_BIT_UPPER, TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_LEFT, TRACK_BIT_ALL, TRACK_BIT_ALL, TRACK_BIT_Y | TRACK_BIT_UPPER | TRACK_BIT_RIGHT, TRACK_BIT_ALL, TRACK_BIT_ALL } }; Foundation GetRailFoundation(Slope tileh, TrackBits bits) { if (!IsSteepSlope(tileh)) { if ((~_valid_tileh_slopes[0][tileh] & bits) == 0) return FOUNDATION_NONE; if ((~_valid_tileh_slopes[1][tileh] & bits) == 0) return FOUNDATION_LEVELED; } switch (bits) { default: NOT_REACHED(); case TRACK_BIT_X: return FOUNDATION_INCLINED_X; case TRACK_BIT_Y: return FOUNDATION_INCLINED_Y; case TRACK_BIT_LEFT: return (tileh == SLOPE_STEEP_W ? FOUNDATION_STEEP_HIGHER : FOUNDATION_STEEP_LOWER); case TRACK_BIT_LOWER: return (tileh == SLOPE_STEEP_S ? FOUNDATION_STEEP_HIGHER : FOUNDATION_STEEP_LOWER); case TRACK_BIT_RIGHT: return (tileh == SLOPE_STEEP_E ? FOUNDATION_STEEP_HIGHER : FOUNDATION_STEEP_LOWER); case TRACK_BIT_UPPER: return (tileh == SLOPE_STEEP_N ? FOUNDATION_STEEP_HIGHER : FOUNDATION_STEEP_LOWER); } } static CommandCost CheckRailSlope(Slope tileh, TrackBits rail_bits, TrackBits existing, TileIndex tile) { if (IsSteepSlope(tileh)) { if (_patches.build_on_slopes && existing == 0) { TrackBits valid = TRACK_BIT_CROSS | (HASBIT(1 << SLOPE_STEEP_W | 1 << SLOPE_STEEP_E, tileh) ? TRACK_BIT_VERT : TRACK_BIT_HORZ); if (valid & rail_bits) return _price.terraform; } } else { rail_bits |= existing; /* don't allow building on the lower side of a coast */ if (IsTileType(tile, MP_WATER) && ~_valid_tileh_slopes[1][tileh] & rail_bits) { return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER); } /* no special foundation */ if ((~_valid_tileh_slopes[0][tileh] & rail_bits) == 0) { return CommandCost(); } else if (!_patches.build_on_slopes || _is_old_ai_player) { return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); } if ((~_valid_tileh_slopes[1][tileh] & rail_bits) == 0 || ( // whole tile is leveled up (rail_bits == TRACK_BIT_X || rail_bits == TRACK_BIT_Y) && (tileh == SLOPE_W || tileh == SLOPE_S || tileh == SLOPE_E || tileh == SLOPE_N) )) { // partly up return CommandCost((existing != 0) ? 0 : _price.terraform); } } return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); } /* Validate functions for rail building */ static inline bool ValParamTrackOrientation(Track track) {return IsValidTrack(track);} /** Build a single piece of rail * @param tile tile to build on * @param flags operation to perform * @param p1 railtype of being built piece (normal, mono, maglev) * @param p2 rail track to build */ CommandCost CmdBuildSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { Slope tileh; RailType railtype; Track track; TrackBits trackbit; CommandCost cost; CommandCost ret; if (!ValParamRailtype(p1) || !ValParamTrackOrientation((Track)p2)) return CMD_ERROR; railtype = (RailType)p1; track = (Track)p2; tileh = GetTileSlope(tile, NULL); trackbit = TrackToTrackBits(track); SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); switch (GetTileType(tile)) { case MP_RAILWAY: if (!CheckTrackCombination(tile, trackbit, flags) || !EnsureNoVehicleOnGround(tile)) { return CMD_ERROR; } if (!IsTileOwner(tile, _current_player) || !IsCompatibleRail(GetRailType(tile), railtype)) { /* Get detailed error message */ return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); } ret = CheckRailSlope(tileh, trackbit, GetTrackBits(tile), tile); if (CmdFailed(ret)) return ret; cost.AddCost(ret); /* If the rail types don't match, try to convert only if engines of * the present rail type are powered on the new rail type. */ if (GetRailType(tile) != railtype && HasPowerOnRail(GetRailType(tile), railtype)) { ret = DoCommand(tile, tile, railtype, flags, CMD_CONVERT_RAIL); if (CmdFailed(ret)) return ret; cost.AddCost(ret); } if (flags & DC_EXEC) { SetRailGroundType(tile, RAIL_GROUND_BARREN); SetTrackBits(tile, GetTrackBits(tile) | trackbit); } break; case MP_ROAD: #define M(x) (1 << (x)) /* Level crossings may only be built on these slopes */ if (!HASBIT(M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT), tileh)) { return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); } #undef M if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR; if (GetRoadTileType(tile) == ROAD_TILE_NORMAL) { if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS); RoadTypes roadtypes = GetRoadTypes(tile); RoadBits road = GetRoadBits(tile, ROADTYPE_ROAD); RoadBits tram = GetRoadBits(tile, ROADTYPE_TRAM); switch (roadtypes) { default: break; case ROADTYPES_TRAM: /* Tram crossings must always have road. */ SetRoadOwner(tile, ROADTYPE_ROAD, _current_player); roadtypes |= ROADTYPES_ROAD; break; case ROADTYPES_ROADTRAM: if (road == tram) break; /* FALL THROUGH */ case ROADTYPES_ROADHWAY: // Road and highway are incompatible in this case case ROADTYPES_TRAMHWAY: // Tram and highway are incompatible in this case case ROADTYPES_ALL: // Also incompatible return CMD_ERROR; } road |= tram | GetRoadBits(tile, ROADTYPE_HWAY); if ((track == TRACK_X && road == ROAD_Y) || (track == TRACK_Y && road == ROAD_X)) { if (flags & DC_EXEC) { MakeRoadCrossing(tile, GetRoadOwner(tile, ROADTYPE_ROAD), GetRoadOwner(tile, ROADTYPE_TRAM), GetRoadOwner(tile, ROADTYPE_HWAY), _current_player, (track == TRACK_X ? AXIS_Y : AXIS_X), railtype, roadtypes, GetTownIndex(tile)); } break; } } if (IsLevelCrossing(tile) && GetCrossingRailBits(tile) == trackbit) { return_cmd_error(STR_1007_ALREADY_BUILT); } /* FALLTHROUGH */ default: ret = CheckRailSlope(tileh, trackbit, TRACK_BIT_NONE, tile); if (CmdFailed(ret)) return ret; cost.AddCost(ret); ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return ret; cost.AddCost(ret); if (flags & DC_EXEC) MakeRailNormal(tile, _current_player, trackbit, railtype); break; } if (flags & DC_EXEC) { MarkTileDirtyByTile(tile); SetSignalsOnBothDir(tile, track); YapfNotifyTrackLayoutChange(tile, track); } return cost.AddCost(_price.build_rail); } /** Remove a single piece of track * @param tile tile to remove track from * @param flags operation to perform * @param p1 unused * @param p2 rail orientation */ CommandCost CmdRemoveSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { Track track = (Track)p2; TrackBits trackbit; CommandCost cost(_price.remove_rail); bool crossing = false; if (!ValParamTrackOrientation((Track)p2)) return CMD_ERROR; trackbit = TrackToTrackBits(track); SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); switch (GetTileType(tile)) { case MP_ROAD: { if (!IsLevelCrossing(tile) || GetCrossingRailBits(tile) != trackbit || (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) || !EnsureNoVehicleOnGround(tile)) { return CMD_ERROR; } if (flags & DC_EXEC) { MakeRoadNormal(tile, GetCrossingRoadBits(tile), GetRoadTypes(tile), GetTownIndex(tile), GetRoadOwner(tile, ROADTYPE_ROAD), GetRoadOwner(tile, ROADTYPE_TRAM), GetRoadOwner(tile, ROADTYPE_HWAY)); } break; } case MP_RAILWAY: { TrackBits present; if (!IsPlainRailTile(tile) || (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) || !EnsureNoVehicleOnGround(tile)) { return CMD_ERROR; } present = GetTrackBits(tile); if ((present & trackbit) == 0) return CMD_ERROR; if (present == (TRACK_BIT_X | TRACK_BIT_Y)) crossing = true; /* Charge extra to remove signals on the track, if they are there */ if (HasSignalOnTrack(tile, track)) cost.AddCost(DoCommand(tile, track, 0, flags, CMD_REMOVE_SIGNALS)); if (flags & DC_EXEC) { present ^= trackbit; if (present == 0) { DoClearSquare(tile); } else { SetTrackBits(tile, present); } } break; } default: return CMD_ERROR; } if (flags & DC_EXEC) { MarkTileDirtyByTile(tile); if (crossing) { /* crossing is set when only TRACK_BIT_X and TRACK_BIT_Y are set. As we * are removing one of these pieces, we'll need to update signals for * both directions explicitly, as after the track is removed it won't * 'connect' with the other piece. */ SetSignalsOnBothDir(tile, TRACK_X); SetSignalsOnBothDir(tile, TRACK_Y); YapfNotifyTrackLayoutChange(tile, TRACK_X); YapfNotifyTrackLayoutChange(tile, TRACK_Y); } else { SetSignalsOnBothDir(tile, track); YapfNotifyTrackLayoutChange(tile, track); } } return cost; } static const TileIndexDiffC _trackdelta[] = { { -1, 0 }, { 0, 1 }, { -1, 0 }, { 0, 1 }, { 1, 0 }, { 0, 1 }, { 0, 0 }, { 0, 0 }, { 1, 0 }, { 0, -1 }, { 0, -1 }, { 1, 0 }, { 0, -1 }, { -1, 0 }, { 0, 0 }, { 0, 0 } }; static CommandCost ValidateAutoDrag(Trackdir *trackdir, TileIndex start, TileIndex end) { int x = TileX(start); int y = TileY(start); int ex = TileX(end); int ey = TileY(end); int dx, dy, trdx, trdy; if (!ValParamTrackOrientation(TrackdirToTrack(*trackdir))) return CMD_ERROR; /* calculate delta x,y from start to end tile */ dx = ex - x; dy = ey - y; /* calculate delta x,y for the first direction */ trdx = _trackdelta[*trackdir].x; trdy = _trackdelta[*trackdir].y; if (!IsDiagonalTrackdir(*trackdir)) { trdx += _trackdelta[*trackdir ^ 1].x; trdy += _trackdelta[*trackdir ^ 1].y; } /* validate the direction */ while ( (trdx <= 0 && dx > 0) || (trdx >= 0 && dx < 0) || (trdy <= 0 && dy > 0) || (trdy >= 0 && dy < 0) ) { if (!HASBIT(*trackdir, 3)) { // first direction is invalid, try the other SetBitT(*trackdir, 3); // reverse the direction trdx = -trdx; trdy = -trdy; } else { // other direction is invalid too, invalid drag return CMD_ERROR; } } /* (for diagonal tracks, this is already made sure of by above test), but: * for non-diagonal tracks, check if the start and end tile are on 1 line */ if (!IsDiagonalTrackdir(*trackdir)) { trdx = _trackdelta[*trackdir].x; trdy = _trackdelta[*trackdir].y; if (abs(dx) != abs(dy) && abs(dx) + abs(trdy) != abs(dy) + abs(trdx)) return CMD_ERROR; } return CommandCost(); } /** Build a stretch of railroad tracks. * @param tile start tile of drag * @param flags operation to perform * @param p1 end tile of drag * @param p2 various bitstuffed elements * - p2 = (bit 0-3) - railroad type normal/maglev (0 = normal, 1 = mono, 2 = maglev) * - p2 = (bit 4-6) - track-orientation, valid values: 0-5 (Track enum) * - p2 = (bit 7) - 0 = build, 1 = remove tracks */ static CommandCost CmdRailTrackHelper(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { CommandCost ret, total_cost; Track track = (Track)GB(p2, 4, 3); Trackdir trackdir; byte mode = HASBIT(p2, 7); RailType railtype = (RailType)GB(p2, 0, 4); TileIndex end_tile; if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR; if (p1 >= MapSize()) return CMD_ERROR; end_tile = p1; trackdir = TrackToTrackdir(track); SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); if (CmdFailed(ValidateAutoDrag(&trackdir, tile, end_tile))) return CMD_ERROR; if (flags & DC_EXEC) SndPlayTileFx(SND_20_SPLAT_2, tile); for (;;) { ret = DoCommand(tile, railtype, TrackdirToTrack(trackdir), flags, (mode == 0) ? CMD_BUILD_SINGLE_RAIL : CMD_REMOVE_SINGLE_RAIL); if (CmdFailed(ret)) { if ((_error_message != STR_1007_ALREADY_BUILT) && (mode == 0)) break; _error_message = INVALID_STRING_ID; } else { total_cost.AddCost(ret); } if (tile == end_tile) break; tile += ToTileIndexDiff(_trackdelta[trackdir]); /* toggle railbit for the non-diagonal tracks */ if (!IsDiagonalTrackdir(trackdir)) ToggleBitT(trackdir, 0); } return (total_cost.GetCost() == 0) ? CMD_ERROR : total_cost; } /** Build rail on a stretch of track. * Stub for the unified rail builder/remover * @param tile start tile of drag * @param flags operation to perform * @param p1 end tile of drag * @param p2 various bitstuffed elements * - p2 = (bit 0-3) - railroad type normal/maglev (0 = normal, 1 = mono, 2 = maglev) * - p2 = (bit 4-6) - track-orientation, valid values: 0-5 (Track enum) * - p2 = (bit 7) - 0 = build, 1 = remove tracks * @see CmdRailTrackHelper */ CommandCost CmdBuildRailroadTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { return CmdRailTrackHelper(tile, flags, p1, CLRBIT(p2, 7)); } /** Build rail on a stretch of track. * Stub for the unified rail builder/remover * @param tile start tile of drag * @param flags operation to perform * @param p1 end tile of drag * @param p2 various bitstuffed elements * - p2 = (bit 0-3) - railroad type normal/maglev (0 = normal, 1 = mono, 2 = maglev) * - p2 = (bit 4-6) - track-orientation, valid values: 0-5 (Track enum) * - p2 = (bit 7) - 0 = build, 1 = remove tracks * @see CmdRailTrackHelper */ CommandCost CmdRemoveRailroadTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { return CmdRailTrackHelper(tile, flags, p1, SETBIT(p2, 7)); } /** Build a train depot * @param tile position of the train depot * @param flags operation to perform * @param p1 rail type * @param p2 bit 0..1 entrance direction (DiagDirection) * * @todo When checking for the tile slope, * distingush between "Flat land required" and "land sloped in wrong direction" */ CommandCost CmdBuildTrainDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { Depot *d; CommandCost cost; Slope tileh; SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); /* check railtype and valid direction for depot (0 through 3), 4 in total */ if (!ValParamRailtype(p1)) return CMD_ERROR; tileh = GetTileSlope(tile, NULL); DiagDirection dir = Extract(p2); /* Prohibit construction if * The tile is non-flat AND * 1) The AI is "old-school" * 2) build-on-slopes is disabled * 3) the tile is steep i.e. spans two height levels * 4) the exit points in the wrong direction */ if (tileh != SLOPE_FLAT && ( _is_old_ai_player || !_patches.build_on_slopes || IsSteepSlope(tileh) || !CanBuildDepotByTileh(dir, tileh) )) { return_cmd_error(STR_0007_FLAT_LAND_REQUIRED); } cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(cost)) return CMD_ERROR; if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST); d = AllocateDepot(); if (d == NULL) return CMD_ERROR; if (flags & DC_EXEC) { MakeRailDepot(tile, _current_player, dir, (RailType)p1); MarkTileDirtyByTile(tile); d->xy = tile; d->town_index = ClosestTownFromTile(tile, (uint)-1)->index; UpdateSignalsOnSegment(tile, dir); YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(dir))); } return cost.AddCost(_price.build_train_depot); } /** Build signals, alternate between double/single, signal/semaphore, * pre/exit/combo-signals, and what-else not. If the rail piece does not * have any signals, bit 4 (cycle signal-type) is ignored * @param tile tile where to build the signals * @param flags operation to perform * @param p1 various bitstuffed elements * - p1 = (bit 0-2) - track-orientation, valid values: 0-5 (Track enum) * - p1 = (bit 3) - 1 = override signal/semaphore, or pre/exit/combo signal (CTRL-toggle) * - p1 = (bit 4) - 0 = signals, 1 = semaphores * @param p2 used for CmdBuildManySignals() to copy direction of first signal * TODO: p2 should be replaced by two bits for "along" and "against" the track. */ CommandCost CmdBuildSingleSignal(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { Track track = (Track)GB(p1, 0, 3); bool pre_signal = HASBIT(p1, 3); SignalVariant sigvar = (pre_signal ^ HASBIT(p1, 4)) ? SIG_SEMAPHORE : SIG_ELECTRIC; CommandCost cost; if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicleOnGround(tile)) return CMD_ERROR; /* Protect against invalid signal copying */ if (p2 != 0 && (p2 & SignalOnTrack(track)) == 0) return CMD_ERROR; /* You can only build signals on plain rail tiles, and the selected track must exist */ if (!IsPlainRailTile(tile) || !HasTrack(tile, track)) return CMD_ERROR; if (!CheckTileOwnership(tile)) return CMD_ERROR; _error_message = STR_1005_NO_SUITABLE_RAILROAD_TRACK; { /* See if this is a valid track combination for signals, (ie, no overlap) */ TrackBits trackbits = GetTrackBits(tile); if (KILL_FIRST_BIT(trackbits) != 0 && /* More than one track present */ trackbits != TRACK_BIT_HORZ && trackbits != TRACK_BIT_VERT) { return CMD_ERROR; } } SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); if (!HasSignalOnTrack(tile, track)) { /* build new signals */ cost = CommandCost(_price.build_signals); } else { if (p2 != 0 && sigvar != GetSignalVariant(tile, track)) { /* convert signals <-> semaphores */ cost = CommandCost(_price.build_signals + _price.remove_signals); } else { /* it is free to change orientation/pre-exit-combo signals */ cost = CommandCost(); } } if (flags & DC_EXEC) { if (!HasSignals(tile)) { /* there are no signals at all on this tile yet */ SetHasSignals(tile, true); SetSignalStates(tile, 0xF); // all signals are on SetPresentSignals(tile, 0); // no signals built by default SetSignalType(tile, track, SIGTYPE_NORMAL); SetSignalVariant(tile, track, sigvar); } if (p2 == 0) { if (!HasSignalOnTrack(tile, track)) { /* build new signals */ SetPresentSignals(tile, GetPresentSignals(tile) | SignalOnTrack(track)); SetSignalType(tile, track, SIGTYPE_NORMAL); SetSignalVariant(tile, track, sigvar); } else { if (pre_signal) { /* cycle between normal -> pre -> exit -> combo -> ... */ SignalType type = GetSignalType(tile, track); SetSignalType(tile, track, type == SIGTYPE_COMBO ? SIGTYPE_NORMAL : (SignalType)(type + 1)); } else { CycleSignalSide(tile, track); } } } else { /* If CmdBuildManySignals is called with copying signals, just copy the * direction of the first signal given as parameter by CmdBuildManySignals */ SetPresentSignals(tile, (GetPresentSignals(tile) & ~SignalOnTrack(track)) | (p2 & SignalOnTrack(track))); SetSignalVariant(tile, track, sigvar); } MarkTileDirtyByTile(tile); SetSignalsOnBothDir(tile, track); YapfNotifyTrackLayoutChange(tile, track); } return cost; } static bool CheckSignalAutoFill(TileIndex &tile, Trackdir &trackdir, int &signal_ctr, bool remove) { tile = AddTileIndexDiffCWrap(tile, _trackdelta[trackdir]); if (tile == INVALID_TILE) return false; /* Check for track bits on the new tile */ uint32 ts = GetTileTrackStatus(tile, TRANSPORT_RAIL, 0); TrackdirBits trackdirbits = (TrackdirBits)(ts & TRACKDIR_BIT_MASK); if (TracksOverlap(TrackdirBitsToTrackBits(trackdirbits))) return false; trackdirbits &= TrackdirReachesTrackdirs(trackdir); /* No track bits, must stop */ if (trackdirbits == TRACKDIR_BIT_NONE) return false; /* Get the first track dir */ trackdir = RemoveFirstTrackdir(&trackdirbits); /* Any left? It's a junction so we stop */ if (trackdirbits != TRACKDIR_BIT_NONE) return false; switch (GetTileType(tile)) { case MP_RAILWAY: if (IsRailDepot(tile)) return false; if (!remove && HasSignalOnTrack(tile, TrackdirToTrack(trackdir))) return false; signal_ctr++; if (IsDiagonalTrackdir(trackdir)) { signal_ctr++; /* Ensure signal_ctr even so X and Y pieces get signals */ CLRBIT(signal_ctr, 0); } return true; case MP_ROAD: if (!IsLevelCrossing(tile)) return false; signal_ctr += 2; return true; case MP_TUNNELBRIDGE: { TileIndex orig_tile = tile; /* Skip to end of tunnel or bridge */ if (IsBridge(tile)) { if (GetBridgeTransportType(tile) != TRANSPORT_RAIL) return false; if (GetBridgeRampDirection(tile) != TrackdirToExitdir(trackdir)) return false; tile = GetOtherBridgeEnd(tile); } else { if (GetTunnelTransportType(tile) != TRANSPORT_RAIL) return false; if (GetTunnelDirection(tile) != TrackdirToExitdir(trackdir)) return false; tile = GetOtherTunnelEnd(tile); } signal_ctr += 2 + DistanceMax(orig_tile, tile) * 2; return true; } default: return false; } } /** Build many signals by dragging; AutoSignals * @param tile start tile of drag * @param flags operation to perform * @param p1 end tile of drag * @param p2 various bitstuffed elements * - p2 = (bit 0- 2) - track-orientation, valid values: 0-5 (Track enum) * - p2 = (bit 3) - 1 = override signal/semaphore, or pre/exit/combo signal (CTRL-toggle) * - p2 = (bit 4) - 0 = signals, 1 = semaphores * - p2 = (bit 5) - 0 = build, 1 = remove signals * - p2 = (bit 6) - 0 = selected stretch, 1 = auto fill * - p2 = (bit 24-31) - user defined signals_density */ static CommandCost CmdSignalTrackHelper(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { CommandCost ret, total_cost; int signal_ctr; byte signals; bool error = true; TileIndex end_tile; TileIndex start_tile = tile; Track track = (Track)GB(p2, 0, 3); bool mode = HASBIT(p2, 3); bool semaphores = HASBIT(p2, 4); bool remove = HASBIT(p2, 5); bool autofill = HASBIT(p2, 6); Trackdir trackdir = TrackToTrackdir(track); byte signal_density = GB(p2, 24, 8); if (p1 >= MapSize()) return CMD_ERROR; end_tile = p1; if (signal_density == 0 || signal_density > 20) return CMD_ERROR; if (!IsTileType(tile, MP_RAILWAY)) return CMD_ERROR; SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); /* for vertical/horizontal tracks, double the given signals density * since the original amount will be too dense (shorter tracks) */ signal_density *= 2; if (CmdFailed(ValidateAutoDrag(&trackdir, tile, end_tile))) return CMD_ERROR; track = TrackdirToTrack(trackdir); /* trackdir might have changed, keep track in sync */ Trackdir start_trackdir = trackdir; /* Autofill must start on a valid track to be able to avoid loops */ if (autofill && !HasTrack(tile, track)) return CMD_ERROR; /* copy the signal-style of the first rail-piece if existing */ if (HasSignals(tile)) { signals = GetPresentSignals(tile) & SignalOnTrack(track); if (signals == 0) signals = SignalOnTrack(track); /* Can this actually occur? */ /* copy signal/semaphores style (independent of CTRL) */ semaphores = GetSignalVariant(tile, track) != SIG_ELECTRIC; } else { // no signals exist, drag a two-way signal stretch signals = SignalOnTrack(track); } byte signal_dir = 0; if (signals & SignalAlongTrackdir(trackdir)) SETBIT(signal_dir, 0); if (signals & SignalAgainstTrackdir(trackdir)) SETBIT(signal_dir, 1); /* signal_ctr - amount of tiles already processed * signals_density - patch setting to put signal on every Nth tile (double space on |, -- tracks) ********** * trackdir - trackdir to build with autorail * semaphores - semaphores or signals * signals - is there a signal/semaphore on the first tile, copy its style (two-way/single-way) * and convert all others to semaphore/signal * remove - 1 remove signals, 0 build signals */ signal_ctr = 0; for (;;) { /* only build/remove signals with the specified density */ if ((remove && autofill) || signal_ctr % signal_density == 0) { uint32 p1 = GB(TrackdirToTrack(trackdir), 0, 3); SB(p1, 3, 1, mode); SB(p1, 4, 1, semaphores); /* Pick the correct orientation for the track direction */ signals = 0; if (HASBIT(signal_dir, 0)) signals |= SignalAlongTrackdir(trackdir); if (HASBIT(signal_dir, 1)) signals |= SignalAgainstTrackdir(trackdir); ret = DoCommand(tile, p1, signals, flags, remove ? CMD_REMOVE_SIGNALS : CMD_BUILD_SIGNALS); /* Be user-friendly and try placing signals as much as possible */ if (CmdSucceeded(ret)) { error = false; total_cost.AddCost(ret); } } if (autofill) { if (!CheckSignalAutoFill(tile, trackdir, signal_ctr, remove)) break; /* Prevent possible loops */ if (tile == start_tile && trackdir == start_trackdir) break; } else { if (tile == end_tile) break; tile += ToTileIndexDiff(_trackdelta[trackdir]); signal_ctr++; /* toggle railbit for the non-diagonal tracks (|, -- tracks) */ if (IsDiagonalTrackdir(trackdir)) { signal_ctr++; } else { ToggleBitT(trackdir, 0); } } } return error ? CMD_ERROR : total_cost; } /** Build signals on a stretch of track. * Stub for the unified signal builder/remover * @param tile start tile of drag * @param flags operation to perform * @param p1 end tile of drag * @param p2 various bitstuffed elements * - p2 = (bit 0- 2) - track-orientation, valid values: 0-5 (Track enum) * - p2 = (bit 3) - 1 = override signal/semaphore, or pre/exit/combo signal (CTRL-toggle) * - p2 = (bit 4) - 0 = signals, 1 = semaphores * - p2 = (bit 5) - 0 = build, 1 = remove signals * - p2 = (bit 6) - 0 = selected stretch, 1 = auto fill * - p2 = (bit 24-31) - user defined signals_density * @see CmdSignalTrackHelper */ CommandCost CmdBuildSignalTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { return CmdSignalTrackHelper(tile, flags, p1, p2); } /** Remove signals * @param tile coordinates where signal is being deleted from * @param flags operation to perform * @param p1 various bitstuffed elements, only track information is used * - (bit 0- 2) - track-orientation, valid values: 0-5 (Track enum) * - (bit 3) - override signal/semaphore, or pre/exit/combo signal (CTRL-toggle) * - (bit 4) - 0 = signals, 1 = semaphores * @param p2 unused */ CommandCost CmdRemoveSingleSignal(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { Track track = (Track)GB(p1, 0, 3); if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicleOnGround(tile) || !HasSignalOnTrack(tile, track)) { return CMD_ERROR; } /* Only water can remove signals from anyone */ if (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) return CMD_ERROR; SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); /* Do it? */ if (flags & DC_EXEC) { SetPresentSignals(tile, GetPresentSignals(tile) & ~SignalOnTrack(track)); /* removed last signal from tile? */ if (GetPresentSignals(tile) == 0) { SetSignalStates(tile, 0); SetHasSignals(tile, false); SetSignalVariant(tile, INVALID_TRACK, SIG_ELECTRIC); // remove any possible semaphores } SetSignalsOnBothDir(tile, track); YapfNotifyTrackLayoutChange(tile, track); MarkTileDirtyByTile(tile); } return CommandCost(_price.remove_signals); } /** Remove signals on a stretch of track. * Stub for the unified signal builder/remover * @param tile start tile of drag * @param flags operation to perform * @param p1 end tile of drag * @param p2 various bitstuffed elements * - p2 = (bit 0- 2) - track-orientation, valid values: 0-5 (Track enum) * - p2 = (bit 3) - 1 = override signal/semaphore, or pre/exit/combo signal (CTRL-toggle) * - p2 = (bit 4) - 0 = signals, 1 = semaphores * - p2 = (bit 5) - 0 = build, 1 = remove signals * - p2 = (bit 6) - 0 = selected stretch, 1 = auto fill * - p2 = (bit 24-31) - user defined signals_density * @see CmdSignalTrackHelper */ CommandCost CmdRemoveSignalTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { return CmdSignalTrackHelper(tile, flags, p1, SETBIT(p2, 5)); // bit 5 is remove bit } typedef CommandCost DoConvertRailProc(TileIndex tile, RailType totype, bool exec); /** * Switches the rail type. * Railtypes are stored on a per-tile basis, not on a per-track basis, so * all the tracks in the given tile will be converted. * @param tile The tile on which the railtype is to be convert. * @param totype The railtype we want to convert to * @param exec Switches between test and execute mode * @return The cost and state of the operation * @retval CMD_ERROR An error occured during the operation. */ static CommandCost DoConvertRail(TileIndex tile, RailType totype, bool exec) { if (!CheckTileOwnership(tile)) return CMD_ERROR; if (GetRailType(tile) == totype) return CMD_ERROR; if (!EnsureNoVehicleOnGround(tile) && (!IsCompatibleRail(GetRailType(tile), totype) || IsPlainRailTile(tile))) return CMD_ERROR; /* 'hidden' elrails can't be downgraded to normal rail when elrails are disabled */ if (_patches.disable_elrails && totype == RAILTYPE_RAIL && GetRailType(tile) == RAILTYPE_ELECTRIC) return CMD_ERROR; /* change type. */ if (exec) { SetRailType(tile, totype); MarkTileDirtyByTile(tile); /* notify YAPF about the track layout change */ TrackBits tracks = GetTrackBits(tile); while (tracks != TRACK_BIT_NONE) { YapfNotifyTrackLayoutChange(tile, RemoveFirstTrack(&tracks)); } if (IsTileDepotType(tile, TRANSPORT_RAIL)) { Vehicle *v; /* Update build vehicle window related to this depot */ InvalidateWindowData(WC_BUILD_VEHICLE, tile); /* update power of trains in this depot */ FOR_ALL_VEHICLES(v) { if (v->type == VEH_TRAIN && IsFrontEngine(v) && v->tile == tile && v->u.rail.track == 0x80) { TrainPowerChanged(v); } } } } return CommandCost(_price.build_rail / 2); } extern CommandCost DoConvertStationRail(TileIndex tile, RailType totype, bool exec); extern CommandCost DoConvertStreetRail(TileIndex tile, RailType totype, bool exec); extern CommandCost DoConvertTunnelBridgeRail(TileIndex tile, RailType totype, bool exec); /** Convert one rail type to the other. You can convert normal rail to * monorail/maglev easily or vice-versa. * @param tile end tile of rail conversion drag * @param flags operation to perform * @param p1 start tile of drag * @param p2 new railtype to convert to */ CommandCost CmdConvertRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { CommandCost ret, cost; Money money; int ex; int ey; int sx, sy, x, y; SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); if (!ValParamRailtype(p2)) return CMD_ERROR; if (p1 >= MapSize()) return CMD_ERROR; /* make sure sx,sy are smaller than ex,ey */ ex = TileX(tile); ey = TileY(tile); sx = TileX(p1); sy = TileY(p1); if (ex < sx) Swap(ex, sx); if (ey < sy) Swap(ey, sy); money = GetAvailableMoneyForCommand(); for (x = sx; x <= ex; ++x) { for (y = sy; y <= ey; ++y) { TileIndex tile = TileXY(x, y); DoConvertRailProc* proc; switch (GetTileType(tile)) { case MP_RAILWAY: proc = DoConvertRail; break; case MP_STATION: proc = DoConvertStationRail; break; case MP_ROAD: proc = DoConvertStreetRail; break; case MP_TUNNELBRIDGE: proc = DoConvertTunnelBridgeRail; break; default: continue; } ret = proc(tile, (RailType)p2, false); if (CmdFailed(ret)) continue; if (flags & DC_EXEC) { money -= ret.GetCost(); if (money < 0) { _additional_cash_required = ret.GetCost(); return cost; } proc(tile, (RailType)p2, true); } cost.AddCost(ret); } } return (cost.GetCost() == 0) ? ret : cost; } static CommandCost RemoveTrainDepot(TileIndex tile, uint32 flags) { if (!CheckTileOwnership(tile) && _current_player != OWNER_WATER) return CMD_ERROR; if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR; if (flags & DC_EXEC) { DiagDirection dir = GetRailDepotDirection(tile); DeleteDepot(GetDepotByTile(tile)); UpdateSignalsOnSegment(tile, dir); YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(dir))); } return CommandCost(_price.remove_train_depot); } static CommandCost ClearTile_Track(TileIndex tile, byte flags) { CommandCost cost; CommandCost ret; if (flags & DC_AUTO) { if (!IsTileOwner(tile, _current_player)) return_cmd_error(STR_1024_AREA_IS_OWNED_BY_ANOTHER); if (IsPlainRailTile(tile)) { return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK); } else { return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED); } } switch (GetRailTileType(tile)) { case RAIL_TILE_SIGNALS: case RAIL_TILE_NORMAL: { TrackBits tracks = GetTrackBits(tile); while (tracks != TRACK_BIT_NONE) { Track track = RemoveFirstTrack(&tracks); ret = DoCommand(tile, 0, track, flags, CMD_REMOVE_SINGLE_RAIL); if (CmdFailed(ret)) return CMD_ERROR; cost.AddCost(ret); } return cost; } case RAIL_TILE_DEPOT: return RemoveTrainDepot(tile, flags); case RAIL_TILE_WAYPOINT: return RemoveTrainWaypoint(tile, flags, false); default: return CMD_ERROR; } } #include "table/track_land.h" static void DrawSingleSignal(TileIndex tile, Track track, byte condition, uint image, uint pos) { bool side = (_opt.road_side != 0) && _patches.signal_side; static const Point SignalPositions[2][12] = { { /* Signals on the left side */ /* LEFT LEFT RIGHT RIGHT UPPER UPPER */ { 8, 5}, {14, 1}, { 1, 14}, { 9, 11}, { 1, 0}, { 3, 10}, /* LOWER LOWER X X Y Y */ {11, 4}, {14, 14}, {11, 3}, { 4, 13}, { 3, 4}, {11, 13} }, { /* Signals on the right side */ /* LEFT LEFT RIGHT RIGHT UPPER UPPER */ {14, 1}, {12, 10}, { 4, 6}, { 1, 14}, {10, 4}, { 0, 1}, /* LOWER LOWER X X Y Y */ {14, 14}, { 5, 12}, {11, 13}, { 4, 3}, {13, 4}, { 3, 11} } }; static const SpriteID SignalBase[2][2][4] = { { /* Signals on left side */ { 0x4FB, 0x1323, 0x1333, 0x1343}, /* light signals */ { 0x1353, 0x1363, 0x1373, 0x1383} /* semaphores */ }, { /* Signals on right side */ { 0x4FB, 0x1323, 0x1333, 0x1343}, /* light signals */ { 0x1446, 0x1456, 0x1466, 0x1476} /* semaphores */ /* | | | | */ /* normal, entry, exit, combo */ } }; uint x = TileX(tile) * TILE_SIZE + SignalPositions[side][pos].x; uint y = TileY(tile) * TILE_SIZE + SignalPositions[side][pos].y; SpriteID sprite; /* _signal_base is set by our NewGRF Action 5 loader. If it is 0 then we * just draw the standard signals, else we get the offset from _signal_base * and draw that sprite. All the signal sprites are loaded sequentially. */ if (_signal_base == 0 || (GetSignalType(tile, track) == SIGTYPE_NORMAL && GetSignalVariant(tile, track) == SIG_ELECTRIC)) { sprite = SignalBase[side][GetSignalVariant(tile, track)][GetSignalType(tile, track)] + image + condition; } else { sprite = _signal_base + (GetSignalType(tile, track) - 1) * 16 + GetSignalVariant(tile, track) * 64 + image + condition; } AddSortableSpriteToDraw(sprite, PAL_NONE, x, y, 1, 1, 10, GetSlopeZ(x,y)); } static uint32 _drawtile_track_palette; static void DrawTrackFence_NW(const TileInfo *ti) { SpriteID image = SPR_TRACK_FENCE_FLAT_X; if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? SPR_TRACK_FENCE_SLOPE_SW : SPR_TRACK_FENCE_SLOPE_NE; AddSortableSpriteToDraw(image, _drawtile_track_palette, ti->x, ti->y + 1, 16, 1, 4, ti->z); } static void DrawTrackFence_SE(const TileInfo *ti) { SpriteID image = SPR_TRACK_FENCE_FLAT_X; if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? SPR_TRACK_FENCE_SLOPE_SW : SPR_TRACK_FENCE_SLOPE_NE; AddSortableSpriteToDraw(image, _drawtile_track_palette, ti->x, ti->y + TILE_SIZE - 1, 16, 1, 4, ti->z); } static void DrawTrackFence_NW_SE(const TileInfo *ti) { DrawTrackFence_NW(ti); DrawTrackFence_SE(ti); } static void DrawTrackFence_NE(const TileInfo *ti) { SpriteID image = SPR_TRACK_FENCE_FLAT_Y; if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? SPR_TRACK_FENCE_SLOPE_SE : SPR_TRACK_FENCE_SLOPE_NW; AddSortableSpriteToDraw(image, _drawtile_track_palette, ti->x + 1, ti->y, 1, 16, 4, ti->z); } static void DrawTrackFence_SW(const TileInfo *ti) { SpriteID image = SPR_TRACK_FENCE_FLAT_Y; if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? SPR_TRACK_FENCE_SLOPE_SE : SPR_TRACK_FENCE_SLOPE_NW; AddSortableSpriteToDraw(image, _drawtile_track_palette, ti->x + TILE_SIZE - 1, ti->y, 1, 16, 4, ti->z); } static void DrawTrackFence_NE_SW(const TileInfo *ti) { DrawTrackFence_NE(ti); DrawTrackFence_SW(ti); } /** * Draw fence at eastern side of track. */ static void DrawTrackFence_NS_1(const TileInfo *ti) { int z = ti->z; if (ti->tileh & SLOPE_W) z += TILE_HEIGHT; AddSortableSpriteToDraw(SPR_TRACK_FENCE_FLAT_VERT, _drawtile_track_palette, ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z); } /** * Draw fence at western side of track. */ static void DrawTrackFence_NS_2(const TileInfo *ti) { int z = ti->z; if (ti->tileh & SLOPE_E) z += TILE_HEIGHT; AddSortableSpriteToDraw(SPR_TRACK_FENCE_FLAT_VERT, _drawtile_track_palette, ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z); } /** * Draw fence at southern side of track. */ static void DrawTrackFence_WE_1(const TileInfo *ti) { int z = ti->z; if (ti->tileh & SLOPE_N) z += TILE_HEIGHT; AddSortableSpriteToDraw(SPR_TRACK_FENCE_FLAT_HORZ, _drawtile_track_palette, ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z); } /** * Draw fence at northern side of track. */ static void DrawTrackFence_WE_2(const TileInfo *ti) { int z = ti->z; if (ti->tileh & SLOPE_S) z += TILE_HEIGHT; AddSortableSpriteToDraw(SPR_TRACK_FENCE_FLAT_HORZ, _drawtile_track_palette, ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z); } static void DrawTrackDetails(const TileInfo* ti) { switch (GetRailGroundType(ti->tile)) { case RAIL_GROUND_FENCE_NW: DrawTrackFence_NW(ti); break; case RAIL_GROUND_FENCE_SE: DrawTrackFence_SE(ti); break; case RAIL_GROUND_FENCE_SENW: DrawTrackFence_NW_SE(ti); break; case RAIL_GROUND_FENCE_NE: DrawTrackFence_NE(ti); break; case RAIL_GROUND_FENCE_SW: DrawTrackFence_SW(ti); break; case RAIL_GROUND_FENCE_NESW: DrawTrackFence_NE_SW(ti); break; case RAIL_GROUND_FENCE_VERT1: DrawTrackFence_NS_1(ti); break; case RAIL_GROUND_FENCE_VERT2: DrawTrackFence_NS_2(ti); break; case RAIL_GROUND_FENCE_HORIZ1: DrawTrackFence_WE_1(ti); break; case RAIL_GROUND_FENCE_HORIZ2: DrawTrackFence_WE_2(ti); break; default: break; } } /** * Draw ground sprite and track bits * @param ti TileInfo * @param track TrackBits to draw */ static void DrawTrackBits(TileInfo* ti, TrackBits track) { const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile)); SpriteID image; SpriteID pal = PAL_NONE; bool junction = false; /* Select the sprite to use. */ (image = rti->base_sprites.track_y, track == TRACK_BIT_Y) || (image++, track == TRACK_BIT_X) || (image++, track == TRACK_BIT_UPPER) || (image++, track == TRACK_BIT_LOWER) || (image++, track == TRACK_BIT_RIGHT) || (image++, track == TRACK_BIT_LEFT) || (image++, track == TRACK_BIT_CROSS) || (image = rti->base_sprites.track_ns, track == TRACK_BIT_HORZ) || (image++, track == TRACK_BIT_VERT) || (junction = true, false) || (image = rti->base_sprites.ground, (track & TRACK_BIT_3WAY_NE) == 0) || (image++, (track & TRACK_BIT_3WAY_SW) == 0) || (image++, (track & TRACK_BIT_3WAY_NW) == 0) || (image++, (track & TRACK_BIT_3WAY_SE) == 0) || (image++, true); if (ti->tileh != SLOPE_FLAT) { DrawFoundation(ti, GetRailFoundation(ti->tileh, track)); /* DrawFoundation() modifies it. * Default sloped sprites.. */ if (ti->tileh != SLOPE_FLAT) image = _track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.track_y; } switch (GetRailGroundType(ti->tile)) { case RAIL_GROUND_BARREN: pal = PALETTE_TO_BARE_LAND; break; case RAIL_GROUND_ICE_DESERT: image += rti->snow_offset; break; default: break; } DrawGroundSprite(image, pal); /* Draw track pieces individually for junction tiles */ if (junction) { if (track & TRACK_BIT_X) DrawGroundSprite(rti->base_sprites.single_y, PAL_NONE); if (track & TRACK_BIT_Y) DrawGroundSprite(rti->base_sprites.single_x, PAL_NONE); if (track & TRACK_BIT_UPPER) DrawGroundSprite(rti->base_sprites.single_n, PAL_NONE); if (track & TRACK_BIT_LOWER) DrawGroundSprite(rti->base_sprites.single_s, PAL_NONE); if (track & TRACK_BIT_LEFT) DrawGroundSprite(rti->base_sprites.single_w, PAL_NONE); if (track & TRACK_BIT_RIGHT) DrawGroundSprite(rti->base_sprites.single_e, PAL_NONE); } } static void DrawSignals(TileIndex tile, TrackBits rails) { #define MAYBE_DRAW_SIGNAL(x,y,z,t) if (IsSignalPresent(tile, x)) DrawSingleSignal(tile, t, GetSingleSignalState(tile, x), y - 0x4FB, z) if (!(rails & TRACK_BIT_Y)) { if (!(rails & TRACK_BIT_X)) { if (rails & TRACK_BIT_LEFT) { MAYBE_DRAW_SIGNAL(2, 0x509, 0, TRACK_LEFT); MAYBE_DRAW_SIGNAL(3, 0x507, 1, TRACK_LEFT); } if (rails & TRACK_BIT_RIGHT) { MAYBE_DRAW_SIGNAL(0, 0x509, 2, TRACK_RIGHT); MAYBE_DRAW_SIGNAL(1, 0x507, 3, TRACK_RIGHT); } if (rails & TRACK_BIT_UPPER) { MAYBE_DRAW_SIGNAL(3, 0x505, 4, TRACK_UPPER); MAYBE_DRAW_SIGNAL(2, 0x503, 5, TRACK_UPPER); } if (rails & TRACK_BIT_LOWER) { MAYBE_DRAW_SIGNAL(1, 0x505, 6, TRACK_LOWER); MAYBE_DRAW_SIGNAL(0, 0x503, 7, TRACK_LOWER); } } else { MAYBE_DRAW_SIGNAL(3, 0x4FB, 8, TRACK_X); MAYBE_DRAW_SIGNAL(2, 0x4FD, 9, TRACK_X); } } else { MAYBE_DRAW_SIGNAL(3, 0x4FF, 10, TRACK_Y); MAYBE_DRAW_SIGNAL(2, 0x501, 11, TRACK_Y); } } static void DrawTile_Track(TileInfo *ti) { const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile)); SpriteID image; _drawtile_track_palette = PLAYER_SPRITE_COLOR(GetTileOwner(ti->tile)); if (IsPlainRailTile(ti->tile)) { TrackBits rails = GetTrackBits(ti->tile); DrawTrackBits(ti, rails); if (HASBIT(_display_opt, DO_FULL_DETAIL)) DrawTrackDetails(ti); if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti); if (HasSignals(ti->tile)) DrawSignals(ti->tile, rails); } else { /* draw depot/waypoint */ const DrawTileSprites* dts; const DrawTileSeqStruct* dtss; uint32 relocation; if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED); if (IsRailDepot(ti->tile)) { dts = &_depot_gfx_table[GetRailDepotDirection(ti->tile)]; relocation = rti->total_offset; image = dts->ground_sprite; if (image != SPR_FLAT_GRASS_TILE) image += rti->total_offset; /* adjust ground tile for desert * don't adjust for snow, because snow in depots looks weird */ if (IsSnowRailGround(ti->tile) && _opt.landscape == LT_TROPIC) { if (image != SPR_FLAT_GRASS_TILE) { image += rti->snow_offset; // tile with tracks } else { image = SPR_FLAT_SNOWY_TILE; // flat ground } } } else { /* look for customization */ byte stat_id = GetWaypointByTile(ti->tile)->stat_id; const StationSpec *statspec = GetCustomStationSpec(STAT_CLASS_WAYP, stat_id); if (statspec != NULL) { /* emulate station tile - open with building */ const Station* st = ComposeWaypointStation(ti->tile); uint gfx = 2; if (HASBIT(statspec->callbackmask, CBM_CUSTOM_LAYOUT)) { uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile); if (callback != CALLBACK_FAILED) gfx = callback; } if (statspec->renderdata == NULL) { dts = GetStationTileLayout(STATION_RAIL, gfx); } else { dts = &statspec->renderdata[(gfx < statspec->tiles ? gfx : 0) + GetWaypointAxis(ti->tile)]; } if (dts != NULL && dts->seq != NULL) { relocation = GetCustomStationRelocation(statspec, st, ti->tile); image = dts->ground_sprite; if (HASBIT(image, SPRITE_MODIFIER_USE_OFFSET)) { image += GetCustomStationGroundRelocation(statspec, st, ti->tile); image += rti->custom_ground_offset; } else { image += rti->total_offset; } } else { goto default_waypoint; } } else { default_waypoint: /* There is no custom layout, fall back to the default graphics */ dts = &_waypoint_gfx_table[GetWaypointAxis(ti->tile)]; relocation = 0; image = dts->ground_sprite + rti->total_offset; if (IsSnowRailGround(ti->tile)) image += rti->snow_offset; } } DrawGroundSprite(image, PAL_NONE); if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti); foreach_draw_tile_seq(dtss, dts->seq) { SpriteID image = dtss->image; SpriteID pal; /* Unlike stations, our default waypoint has no variation for * different railtype, so don't use the railtype offset if * no relocation is set */ if (HASBIT(image, SPRITE_MODIFIER_USE_OFFSET)) { image += rti->total_offset; } else { image += relocation; } if (!HASBIT(_transparent_opt, TO_BUILDINGS) && HASBIT(image, PALETTE_MODIFIER_COLOR)) { pal = _drawtile_track_palette; } else { pal = dtss->pal; } if ((byte)dtss->delta_z != 0x80) { AddSortableSpriteToDraw( image, pal, ti->x + dtss->delta_x, ti->y + dtss->delta_y, dtss->size_x, dtss->size_y, dtss->size_z, ti->z + dtss->delta_z, HASBIT(_transparent_opt, TO_BUILDINGS) ); } else { AddChildSpriteScreen(image, pal, dtss->delta_x, dtss->delta_y); } } } DrawBridgeMiddle(ti); } static void DrawTileSequence(int x, int y, SpriteID ground, const DrawTileSeqStruct* dtss, uint32 offset) { SpriteID palette = PLAYER_SPRITE_COLOR(_local_player); DrawSprite(ground, PAL_NONE, x, y); for (; dtss->image != 0; dtss++) { Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z); SpriteID image = dtss->image + offset; DrawSprite(image, HASBIT(image, PALETTE_MODIFIER_COLOR) ? palette : PAL_NONE, x + pt.x, y + pt.y); } } void DrawTrainDepotSprite(int x, int y, int dir, RailType railtype) { const DrawTileSprites* dts = &_depot_gfx_table[dir]; SpriteID image = dts->ground_sprite; uint32 offset = GetRailTypeInfo(railtype)->total_offset; if (image != SPR_FLAT_GRASS_TILE) image += offset; DrawTileSequence(x + 33, y + 17, image, dts->seq, offset); } void DrawDefaultWaypointSprite(int x, int y, RailType railtype) { uint32 offset = GetRailTypeInfo(railtype)->total_offset; const DrawTileSprites* dts = &_waypoint_gfx_table[AXIS_X]; DrawTileSequence(x, y, dts->ground_sprite + offset, dts->seq, 0); } struct SetSignalsData { int cur; int cur_stack; bool stop; bool has_presignal; /* presignal info */ int presignal_exits; int presignal_exits_free; /* these are used to keep track of the signals that change. */ TrackdirByte bit[NUM_SSD_ENTRY]; TileIndex tile[NUM_SSD_ENTRY]; /* these are used to keep track of the stack that modifies presignals recursively */ TileIndex next_tile[NUM_SSD_STACK]; DiagDirectionByte next_dir[NUM_SSD_STACK]; }; static bool SetSignalsEnumProc(TileIndex tile, void* data, Trackdir trackdir, uint length, byte* state) { SetSignalsData* ssd = (SetSignalsData*)data; Track track = TrackdirToTrack(trackdir); if (!IsTileType(tile, MP_RAILWAY)) return false; /* the tile has signals? */ if (HasSignalOnTrack(tile, track)) { if (HasSignalOnTrackdir(tile, ReverseTrackdir(trackdir))) { /* yes, add the signal to the list of signals */ if (ssd->cur != NUM_SSD_ENTRY) { ssd->tile[ssd->cur] = tile; // remember the tile index ssd->bit[ssd->cur] = trackdir; // and the controlling bit number ssd->cur++; } /* remember if this block has a presignal. */ ssd->has_presignal |= IsPresignalEntry(tile, track); } if (HasSignalOnTrackdir(tile, trackdir) && IsPresignalExit(tile, track)) { /* this is an exit signal that points out from the segment */ ssd->presignal_exits++; if (GetSignalStateByTrackdir(tile, trackdir) != SIGNAL_STATE_RED) ssd->presignal_exits_free++; } return true; } else if (IsTileDepotType(tile, TRANSPORT_RAIL)) { return true; // don't look further if the tile is a depot } return false; } /* Struct to parse data from VehicleFromPos to SignalVehicleCheckProc */ struct SignalVehicleCheckStruct { TileIndex tile; uint track; }; static void *SignalVehicleCheckProc(Vehicle *v, void *data) { const SignalVehicleCheckStruct* dest = (SignalVehicleCheckStruct*)data; if (v->type != VEH_TRAIN) return NULL; /* Wrong tile, or no train? Not a match */ if (v->tile != dest->tile) return NULL; /* Are we on the same piece of track? */ if (dest->track & v->u.rail.track * 0x101) return v; return NULL; } /* Special check for SetSignalsAfterProc, to see if there is a vehicle on this tile */ static bool SignalVehicleCheck(TileIndex tile, uint track) { SignalVehicleCheckStruct dest; dest.tile = tile; dest.track = track; /* Locate vehicles in tunnels or on bridges */ if (IsTunnelTile(tile) || IsBridgeTile(tile)) { TileIndex end; DiagDirection direction; if (IsTunnelTile(tile)) { end = GetOtherTunnelEnd(tile); direction = GetTunnelDirection(tile); } else { end = GetOtherBridgeEnd(tile); direction = GetBridgeRampDirection(tile); } dest.track = 1 << (direction & 1); // get the trackbit the vehicle would have if it has not entered the tunnel yet (ie is still visible) /* check for a vehicle with that trackdir on the start tile of the tunnel */ if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL) return true; /* check for a vehicle with that trackdir on the end tile of the tunnel */ if (VehicleFromPos(end, &dest, SignalVehicleCheckProc) != NULL) return true; /* now check all tiles from start to end for a warping vehicle */ dest.track = 0x40; //Vehicle inside a tunnel or on a bridge if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL) return true; if (VehicleFromPos(end, &dest, SignalVehicleCheckProc) != NULL) return true; /* no vehicle found */ return false; } return VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL; } static void SetSignalsAfterProc(TrackPathFinder *tpf) { SetSignalsData *ssd = (SetSignalsData*)tpf->userdata; const TrackPathFinderLink* link; uint offs; uint i; ssd->stop = false; /* Go through all the PF tiles */ for (i = 0; i < lengthof(tpf->hash_head); i++) { /* Empty hash item */ if (tpf->hash_head[i] == 0) continue; /* If 0x8000 is not set, there is only 1 item */ if (!(tpf->hash_head[i] & 0x8000)) { /* Check if there is a vehicle on this tile */ if (SignalVehicleCheck(tpf->hash_tile[i], tpf->hash_head[i])) { ssd->stop = true; return; } } else { /* There are multiple items, where hash_tile points to the first item in the list */ offs = tpf->hash_tile[i]; do { /* Find the next item */ link = PATHFIND_GET_LINK_PTR(tpf, offs); /* Check if there is a vehicle on this tile */ if (SignalVehicleCheck(link->tile, link->flags)) { ssd->stop = true; return; } /* Goto the next item */ } while ((offs = link->next) != 0xFFFF); } } } static void ChangeSignalStates(SetSignalsData *ssd) { int i; /* thinking about presignals... * the presignal is green if, * if no train is in the segment AND * there is at least one green exit signal OR * there are no exit signals in the segment */ /* then mark the signals in the segment accordingly */ for (i = 0; i != ssd->cur; i++) { TileIndex tile = ssd->tile[i]; byte bit = SignalAgainstTrackdir(ssd->bit[i]); uint signals = GetSignalStates(tile); Track track = TrackdirToTrack(ssd->bit[i]); /* presignals don't turn green if there is at least one presignal exit and none are free */ if (IsPresignalEntry(tile, track)) { int ex = ssd->presignal_exits, exfree = ssd->presignal_exits_free; /* subtract for dual combo signals so they don't count themselves */ if (IsPresignalExit(tile, track) && HasSignalOnTrackdir(tile, ssd->bit[i])) { ex--; if (GetSignalStateByTrackdir(tile, ssd->bit[i]) != SIGNAL_STATE_RED) exfree--; } /* if we have exits and none are free, make red. */ if (ex && !exfree) goto make_red; } /* check if the signal is unaffected. */ if (ssd->stop) { make_red: /* turn red */ if ((bit & signals) == 0) continue; } else { /* turn green */ if ((bit & signals) != 0) continue; } /* Update signals on the other side of this exit-combo signal; it changed. */ if (IsPresignalExit(tile, track)) { if (ssd->cur_stack != NUM_SSD_STACK) { ssd->next_tile[ssd->cur_stack] = tile; ssd->next_dir[ssd->cur_stack] = TrackdirToExitdir(ssd->bit[i]); ssd->cur_stack++; } else { DEBUG(misc, 0, "NUM_SSD_STACK too small"); /// @todo WTF is this??? } } /* it changed, so toggle it */ SetSignalStates(tile, signals ^ bit); MarkTileDirtyByTile(tile); } } bool UpdateSignalsOnSegment(TileIndex tile, DiagDirection direction) { SetSignalsData ssd; int result = -1; ssd.cur_stack = 0; for (;;) { /* go through one segment and update all signals pointing into that segment. */ ssd.cur = ssd.presignal_exits = ssd.presignal_exits_free = 0; ssd.has_presignal = false; FollowTrack(tile, 0xC000 | TRANSPORT_RAIL, 0, direction, SetSignalsEnumProc, SetSignalsAfterProc, &ssd); ChangeSignalStates(&ssd); /* remember the result only for the first iteration. */ if (result < 0) { /* stay in depot while segment is occupied or while all presignal exits are blocked */ result = ssd.stop || (ssd.presignal_exits > 0 && ssd.presignal_exits_free == 0); } /* if any exit signals were changed, we need to keep going to modify the stuff behind those. */ if (ssd.cur_stack == 0) break; /* one or more exit signals were changed, so we need to update another segment too. */ tile = ssd.next_tile[--ssd.cur_stack]; direction = ssd.next_dir[ssd.cur_stack]; } return result != 0; } void SetSignalsOnBothDir(TileIndex tile, byte track) { static const DiagDirection _search_dir_1[] = { DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_SW, DIAGDIR_SE }; static const DiagDirection _search_dir_2[] = { DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NE }; UpdateSignalsOnSegment(tile, _search_dir_1[track]); UpdateSignalsOnSegment(tile, _search_dir_2[track]); } static uint GetSlopeZ_Track(TileIndex tile, uint x, uint y) { uint z; Slope tileh = GetTileSlope(tile, &z); if (tileh == SLOPE_FLAT) return z; if (IsPlainRailTile(tile)) { z += ApplyFoundationToSlope(GetRailFoundation(tileh, GetTrackBits(tile)), &tileh); return z + GetPartialZ(x & 0xF, y & 0xF, tileh); } else { return z + TILE_HEIGHT; } } static Foundation GetFoundation_Track(TileIndex tile, Slope tileh) { return IsPlainRailTile(tile) ? GetRailFoundation(tileh, GetTrackBits(tile)) : FlatteningFoundation(tileh); } static void GetAcceptedCargo_Track(TileIndex tile, AcceptedCargo ac) { /* not used */ } static void AnimateTile_Track(TileIndex tile) { /* not used */ } static void TileLoop_Track(TileIndex tile) { RailGroundType old_ground = GetRailGroundType(tile); RailGroundType new_ground; switch (_opt.landscape) { case LT_ARCTIC: if (GetTileZ(tile) > GetSnowLine()) { new_ground = RAIL_GROUND_ICE_DESERT; goto set_ground; } break; case LT_TROPIC: if (GetTropicZone(tile) == TROPICZONE_DESERT) { new_ground = RAIL_GROUND_ICE_DESERT; goto set_ground; } break; } if (!IsPlainRailTile(tile)) return; new_ground = RAIL_GROUND_GRASS; if (old_ground != RAIL_GROUND_BARREN) { // wait until bottom is green /* determine direction of fence */ TrackBits rail = GetTrackBits(tile); switch (rail) { case TRACK_BIT_UPPER: new_ground = RAIL_GROUND_FENCE_HORIZ1; break; case TRACK_BIT_LOWER: new_ground = RAIL_GROUND_FENCE_HORIZ2; break; case TRACK_BIT_LEFT: new_ground = RAIL_GROUND_FENCE_VERT1; break; case TRACK_BIT_RIGHT: new_ground = RAIL_GROUND_FENCE_VERT2; break; default: { PlayerID owner = GetTileOwner(tile); if (rail == (TRACK_BIT_LOWER | TRACK_BIT_RIGHT) || ( (rail & TRACK_BIT_3WAY_NW) == 0 && (rail & TRACK_BIT_X) )) { TileIndex n = tile + TileDiffXY(0, -1); TrackBits nrail = GetTrackBits(n); if (!IsTileType(n, MP_RAILWAY) || !IsTileOwner(n, owner) || nrail == TRACK_BIT_UPPER || nrail == TRACK_BIT_LEFT) { new_ground = RAIL_GROUND_FENCE_NW; } } if (rail == (TRACK_BIT_UPPER | TRACK_BIT_LEFT) || ( (rail & TRACK_BIT_3WAY_SE) == 0 && (rail & TRACK_BIT_X) )) { TileIndex n = tile + TileDiffXY(0, 1); TrackBits nrail = GetTrackBits(n); if (!IsTileType(n, MP_RAILWAY) || !IsTileOwner(n, owner) || nrail == TRACK_BIT_LOWER || nrail == TRACK_BIT_RIGHT) { new_ground = (new_ground == RAIL_GROUND_FENCE_NW) ? RAIL_GROUND_FENCE_SENW : RAIL_GROUND_FENCE_SE; } } if (rail == (TRACK_BIT_LOWER | TRACK_BIT_LEFT) || ( (rail & TRACK_BIT_3WAY_NE) == 0 && (rail & TRACK_BIT_Y) )) { TileIndex n = tile + TileDiffXY(-1, 0); TrackBits nrail = GetTrackBits(n); if (!IsTileType(n, MP_RAILWAY) || !IsTileOwner(n, owner) || nrail == TRACK_BIT_UPPER || nrail == TRACK_BIT_RIGHT) { new_ground = RAIL_GROUND_FENCE_NE; } } if (rail == (TRACK_BIT_UPPER | TRACK_BIT_RIGHT) || ( (rail & TRACK_BIT_3WAY_SW) == 0 && (rail & TRACK_BIT_Y) )) { TileIndex n = tile + TileDiffXY(1, 0); TrackBits nrail = GetTrackBits(n); if (!IsTileType(n, MP_RAILWAY) || !IsTileOwner(n, owner) || nrail == TRACK_BIT_LOWER || nrail == TRACK_BIT_LEFT) { new_ground = (new_ground == RAIL_GROUND_FENCE_NE) ? RAIL_GROUND_FENCE_NESW : RAIL_GROUND_FENCE_SW; } } break; } } } set_ground: if (old_ground != new_ground) { SetRailGroundType(tile, new_ground); MarkTileDirtyByTile(tile); } } static uint32 GetTileTrackStatus_Track(TileIndex tile, TransportType mode, uint sub_mode) { if (mode != TRANSPORT_RAIL) return 0; switch (GetRailTileType(tile)) { default: NOT_REACHED(); case RAIL_TILE_NORMAL: { TrackBits rails = GetTrackBits(tile); uint32 ret = rails * 0x101; return (rails == TRACK_BIT_CROSS) ? ret | 0x40 : ret; } case RAIL_TILE_SIGNALS: { uint32 ret = GetTrackBits(tile) * 0x101; byte a = GetPresentSignals(tile); uint b = GetSignalStates(tile); b &= a; /* When signals are not present (in neither * direction), we pretend them to be green. (So if * signals are only one way, the other way will * implicitely become `red' */ if ((a & 0xC) == 0) b |= 0xC; if ((a & 0x3) == 0) b |= 0x3; if ((b & 0x8) == 0) ret |= 0x10070000; if ((b & 0x4) == 0) ret |= 0x07100000; if ((b & 0x2) == 0) ret |= 0x20080000; if ((b & 0x1) == 0) ret |= 0x08200000; return ret; } case RAIL_TILE_DEPOT: return AxisToTrackBits(DiagDirToAxis(GetRailDepotDirection(tile))) * 0x101; case RAIL_TILE_WAYPOINT: return GetRailWaypointBits(tile) * 0x101; } } static void ClickTile_Track(TileIndex tile) { switch (GetRailTileType(tile)) { case RAIL_TILE_DEPOT: ShowDepotWindow(tile, VEH_TRAIN); break; case RAIL_TILE_WAYPOINT: ShowRenameWaypointWindow(GetWaypointByTile(tile)); break; default: break; } } static void GetTileDesc_Track(TileIndex tile, TileDesc *td) { td->owner = GetTileOwner(tile); switch (GetRailTileType(tile)) { case RAIL_TILE_NORMAL: td->str = STR_1021_RAILROAD_TRACK; break; case RAIL_TILE_SIGNALS: { const StringID signal_type[4][4] = { { STR_RAILROAD_TRACK_WITH_NORMAL_SIGNALS, STR_RAILROAD_TRACK_WITH_NORMAL_PRESIGNALS, STR_RAILROAD_TRACK_WITH_NORMAL_EXITSIGNALS, STR_RAILROAD_TRACK_WITH_NORMAL_COMBOSIGNALS }, { STR_RAILROAD_TRACK_WITH_NORMAL_PRESIGNALS, STR_RAILROAD_TRACK_WITH_PRESIGNALS, STR_RAILROAD_TRACK_WITH_PRE_EXITSIGNALS, STR_RAILROAD_TRACK_WITH_PRE_COMBOSIGNALS }, { STR_RAILROAD_TRACK_WITH_NORMAL_EXITSIGNALS, STR_RAILROAD_TRACK_WITH_PRE_EXITSIGNALS, STR_RAILROAD_TRACK_WITH_EXITSIGNALS, STR_RAILROAD_TRACK_WITH_EXIT_COMBOSIGNALS }, { STR_RAILROAD_TRACK_WITH_NORMAL_COMBOSIGNALS, STR_RAILROAD_TRACK_WITH_PRE_COMBOSIGNALS, STR_RAILROAD_TRACK_WITH_EXIT_COMBOSIGNALS, STR_RAILROAD_TRACK_WITH_COMBOSIGNALS } }; td->str = signal_type[GetSignalType(tile, TRACK_UPPER)][GetSignalType(tile, TRACK_LOWER)]; break; } case RAIL_TILE_DEPOT: td->str = STR_1023_RAILROAD_TRAIN_DEPOT; break; case RAIL_TILE_WAYPOINT: default: td->str = STR_LANDINFO_WAYPOINT; break; } } static void ChangeTileOwner_Track(TileIndex tile, PlayerID old_player, PlayerID new_player) { if (!IsTileOwner(tile, old_player)) return; if (new_player != PLAYER_SPECTATOR) { SetTileOwner(tile, new_player); } else { DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR); } } static const byte _fractcoords_behind[4] = { 0x8F, 0x8, 0x80, 0xF8 }; static const byte _fractcoords_enter[4] = { 0x8A, 0x48, 0x84, 0xA8 }; static const signed char _deltacoord_leaveoffset[8] = { -1, 0, 1, 0, /* x */ 0, 1, 0, -1 /* y */ }; static uint32 VehicleEnter_Track(Vehicle *v, TileIndex tile, int x, int y) { byte fract_coord; byte fract_coord_leave; DiagDirection dir; int length; /* this routine applies only to trains in depot tiles */ if (v->type != VEH_TRAIN || !IsTileDepotType(tile, TRANSPORT_RAIL)) return VETSB_CONTINUE; /* depot direction */ dir = GetRailDepotDirection(tile); /* calculate the point where the following wagon should be activated */ /* this depends on the length of the current vehicle */ length = v->u.rail.cached_veh_length; fract_coord_leave = ((_fractcoords_enter[dir] & 0x0F) + // x (length + 1) * _deltacoord_leaveoffset[dir]) + (((_fractcoords_enter[dir] >> 4) + // y ((length + 1) * _deltacoord_leaveoffset[dir+4])) << 4); fract_coord = (x & 0xF) + ((y & 0xF) << 4); if (_fractcoords_behind[dir] == fract_coord) { /* make sure a train is not entering the tile from behind */ return VETSB_CANNOT_ENTER; } else if (_fractcoords_enter[dir] == fract_coord) { if (DiagDirToDir(ReverseDiagDir(dir)) == v->direction) { /* enter the depot */ v->u.rail.track = TRACK_BIT_DEPOT, v->vehstatus |= VS_HIDDEN; /* hide it */ v->direction = ReverseDir(v->direction); if (v->next == NULL) VehicleEnterDepot(v); v->tile = tile; InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile); return VETSB_ENTERED_WORMHOLE; } } else if (fract_coord_leave == fract_coord) { if (DiagDirToDir(dir) == v->direction) { /* leave the depot? */ if ((v = v->next) != NULL) { v->vehstatus &= ~VS_HIDDEN; v->u.rail.track = (DiagDirToAxis(dir) == AXIS_X ? TRACK_BIT_X : TRACK_BIT_Y); } } } return VETSB_CONTINUE; } extern const TileTypeProcs _tile_type_rail_procs = { DrawTile_Track, /* draw_tile_proc */ GetSlopeZ_Track, /* get_slope_z_proc */ ClearTile_Track, /* clear_tile_proc */ GetAcceptedCargo_Track, /* get_accepted_cargo_proc */ GetTileDesc_Track, /* get_tile_desc_proc */ GetTileTrackStatus_Track, /* get_tile_track_status_proc */ ClickTile_Track, /* click_tile_proc */ AnimateTile_Track, /* animate_tile_proc */ TileLoop_Track, /* tile_loop_clear */ ChangeTileOwner_Track, /* change_tile_owner_clear */ NULL, /* get_produced_cargo_proc */ VehicleEnter_Track, /* vehicle_enter_tile_proc */ GetFoundation_Track, /* get_foundation_proc */ };