/* $Id$ */ /* * This file is part of OpenTTD. * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. */ /** @file rail_cmd.cpp Handling of rail tiles. */ #include "stdafx.h" #include "openttd.h" #include "cmd_helper.h" #include "landscape.h" #include "viewport_func.h" #include "command_func.h" #include "engine_base.h" #include "depot_base.h" #include "yapf/yapf.h" #include "newgrf_engine.h" #include "landscape_type.h" #include "newgrf_commons.h" #include "train.h" #include "variables.h" #include "autoslope.h" #include "water.h" #include "tunnelbridge_map.h" #include "window_func.h" #include "vehicle_func.h" #include "sound_func.h" #include "tunnelbridge.h" #include "functions.h" #include "elrail_func.h" #include "town.h" #include "table/strings.h" #include "table/railtypes.h" #include "table/track_land.h" RailtypeInfo _railtypes[RAILTYPE_END]; assert_compile(sizeof(_original_railtypes) <= sizeof(_railtypes)); /** * Initialize rail type information. */ void ResetRailTypes() { memset(_railtypes, 0, sizeof(_railtypes)); memcpy(_railtypes, _original_railtypes, sizeof(_original_railtypes)); } static 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 */ Vehicle *EnsureNoTrainOnTrackProc(Vehicle *v, void *data) { TrackBits rail_bits = *(TrackBits *)data; if (v->type != VEH_TRAIN) return NULL; Train *t = Train::From(v); if ((t->track != rail_bits) && !TracksOverlap(t->track | rail_bits)) return NULL; _error_message = STR_ERROR_TRAIN_IN_THE_WAY + v->type; return v; } /** * Tests if a vehicle interacts with the specified track. * All track bits interact except parallel TRACK_BIT_HORZ or TRACK_BIT_VERT. * * @param tile The tile. * @param track The track. */ static bool EnsureNoTrainOnTrack(TileIndex tile, Track track) { TrackBits rail_bits = TrackToTrackBits(track); return !HasVehicleOnPos(tile, &rail_bits, &EnsureNoTrainOnTrackProc); } 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_ERROR_IMPOSSIBLE_TRACK_COMBINATION; if (!IsPlainRail(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_ERROR_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 companies 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; } } /** Valid TrackBits on a specific (non-steep)-slope without foundation */ static const TrackBits _valid_tracks_without_foundation[15] = { 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, }; /** Valid TrackBits on a specific (non-steep)-slope with leveled foundation */ static const TrackBits _valid_tracks_on_leveled_foundation[15] = { 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 }; /** * Checks if a track combination is valid on a specific slope and returns the needed foundation. * * @param tileh Tile slope. * @param bits Trackbits. * @return Needed foundation or FOUNDATION_INVALID if track/slope combination is not allowed. */ Foundation GetRailFoundation(Slope tileh, TrackBits bits) { if (bits == TRACK_BIT_NONE) return FOUNDATION_NONE; if (IsSteepSlope(tileh)) { /* Test for inclined foundations */ if (bits == TRACK_BIT_X) return FOUNDATION_INCLINED_X; if (bits == TRACK_BIT_Y) return FOUNDATION_INCLINED_Y; /* Get higher track */ Corner highest_corner = GetHighestSlopeCorner(tileh); TrackBits higher_track = CornerToTrackBits(highest_corner); /* Only higher track? */ if (bits == higher_track) return HalftileFoundation(highest_corner); /* Overlap with higher track? */ if (TracksOverlap(bits | higher_track)) return FOUNDATION_INVALID; /* either lower track or both higher and lower track */ return ((bits & higher_track) != 0 ? FOUNDATION_STEEP_BOTH : FOUNDATION_STEEP_LOWER); } else { if ((~_valid_tracks_without_foundation[tileh] & bits) == 0) return FOUNDATION_NONE; bool valid_on_leveled = ((~_valid_tracks_on_leveled_foundation[tileh] & bits) == 0); Corner track_corner; switch (bits) { case TRACK_BIT_LEFT: track_corner = CORNER_W; break; case TRACK_BIT_LOWER: track_corner = CORNER_S; break; case TRACK_BIT_RIGHT: track_corner = CORNER_E; break; case TRACK_BIT_UPPER: track_corner = CORNER_N; break; case TRACK_BIT_HORZ: if (tileh == SLOPE_N) return HalftileFoundation(CORNER_N); if (tileh == SLOPE_S) return HalftileFoundation(CORNER_S); return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID); case TRACK_BIT_VERT: if (tileh == SLOPE_W) return HalftileFoundation(CORNER_W); if (tileh == SLOPE_E) return HalftileFoundation(CORNER_E); return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID); case TRACK_BIT_X: if (IsSlopeWithOneCornerRaised(tileh)) return FOUNDATION_INCLINED_X; return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID); case TRACK_BIT_Y: if (IsSlopeWithOneCornerRaised(tileh)) return FOUNDATION_INCLINED_Y; return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID); default: return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID); } /* Single diagonal track */ /* Track must be at least valid on leveled foundation */ if (!valid_on_leveled) return FOUNDATION_INVALID; /* If slope has three raised corners, build leveled foundation */ if (IsSlopeWithThreeCornersRaised(tileh)) return FOUNDATION_LEVELED; /* If neighboured corners of track_corner are lowered, build halftile foundation */ if ((tileh & SlopeWithThreeCornersRaised(OppositeCorner(track_corner))) == SlopeWithOneCornerRaised(track_corner)) return HalftileFoundation(track_corner); /* else special anti-zig-zag foundation */ return SpecialRailFoundation(track_corner); } } /** * Tests if a track can be build on a tile. * * @param tileh Tile slope. * @param rail_bits Tracks to build. * @param existing Tracks already built. * @param tile Tile (used for water test) * @return Error message or cost for foundation building. */ static CommandCost CheckRailSlope(Slope tileh, TrackBits rail_bits, TrackBits existing, TileIndex tile) { /* don't allow building on the lower side of a coast */ if (IsTileType(tile, MP_WATER) || (IsTileType(tile, MP_RAILWAY) && (GetRailGroundType(tile) == RAIL_GROUND_WATER))) { if (!IsSteepSlope(tileh) && ((~_valid_tracks_on_leveled_foundation[tileh] & (rail_bits | existing)) != 0)) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER); } Foundation f_new = GetRailFoundation(tileh, rail_bits | existing); /* check track/slope combination */ if ((f_new == FOUNDATION_INVALID) || ((f_new != FOUNDATION_NONE) && (!_settings_game.construction.build_on_slopes))) { return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION); } Foundation f_old = GetRailFoundation(tileh, existing); return CommandCost(EXPENSES_CONSTRUCTION, f_new != f_old ? _price.terraform : (Money)0); } /* 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 * @param text unused * @return the cost of this operation or an error */ CommandCost CmdBuildSingleRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { Slope tileh; RailType railtype = (RailType)p1; Track track = (Track)p2; TrackBits trackbit; CommandCost cost(EXPENSES_CONSTRUCTION); CommandCost ret; if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR; tileh = GetTileSlope(tile, NULL); trackbit = TrackToTrackBits(track); switch (GetTileType(tile)) { case MP_RAILWAY: if (!CheckTileOwnership(tile)) return CMD_ERROR; if (!IsPlainRail(tile)) return CMD_ERROR; if (!IsCompatibleRail(GetRailType(tile), railtype)) return_cmd_error(STR_ERROR_IMPOSSIBLE_TRACK_COMBINATION); if (!CheckTrackCombination(tile, trackbit, flags) || !EnsureNoTrainOnTrack(tile, track)) { return CMD_ERROR; } 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 new rail type are not powered on the present rail type and engines of * the present rail type are powered on the new rail type. */ if (GetRailType(tile) != railtype && !HasPowerOnRail(railtype, GetRailType(tile))) { if (HasPowerOnRail(GetRailType(tile), railtype)) { ret = DoCommand(tile, tile, railtype, flags, CMD_CONVERT_RAIL); if (CmdFailed(ret)) return ret; cost.AddCost(ret); } else { return CMD_ERROR; } } 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_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION); } #undef M if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR; if (IsNormalRoad(tile)) { if (HasRoadWorks(tile)) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS); if (GetDisallowedRoadDirections(tile) != DRD_NONE) return_cmd_error(STR_ERROR_CROSSING_ON_ONEWAY_ROAD); 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. */ if (flags & DC_EXEC) SetRoadOwner(tile, ROADTYPE_ROAD, _current_company); roadtypes |= ROADTYPES_ROAD; break; case ROADTYPES_ALL: if (road != tram) return CMD_ERROR; break; } road |= tram; 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), _current_company, (track == TRACK_X ? AXIS_Y : AXIS_X), railtype, roadtypes, GetTownIndex(tile)); UpdateLevelCrossing(tile, false); } break; } } if (IsLevelCrossing(tile) && GetCrossingRailBits(tile) == trackbit) { return_cmd_error(STR_ERROR_ALREADY_BUILT); } /* FALLTHROUGH */ default: /* Will there be flat water on the lower halftile? */ bool water_ground = IsTileType(tile, MP_WATER) && IsSlopeWithOneCornerRaised(tileh); 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 (water_ground) { cost.AddCost(-_price.clear_water); cost.AddCost(_price.clear_roughland); } if (flags & DC_EXEC) { MakeRailNormal(tile, _current_company, trackbit, railtype); if (water_ground) SetRailGroundType(tile, RAIL_GROUND_WATER); } break; } if (flags & DC_EXEC) { MarkTileDirtyByTile(tile); AddTrackToSignalBuffer(tile, track, _current_company); YapfNotifyTrackLayoutChange(tile, track); } return cost.AddCost(RailBuildCost(railtype)); } /** 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 * @param text unused * @return the cost of this operation or an error */ CommandCost CmdRemoveSingleRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { Track track = (Track)p2; TrackBits trackbit; CommandCost cost(EXPENSES_CONSTRUCTION, _price.remove_rail ); bool crossing = false; if (!ValParamTrackOrientation((Track)p2)) return CMD_ERROR; trackbit = TrackToTrackBits(track); /* Need to read tile owner now because it may change when the rail is removed * Also, in case of floods, _current_company != owner * There may be invalid tiletype even in exec run (when removing long track), * so do not call GetTileOwner(tile) in any case here */ Owner owner = INVALID_OWNER; Train *v = NULL; switch (GetTileType(tile)) { case MP_ROAD: { if (!IsLevelCrossing(tile) || GetCrossingRailBits(tile) != trackbit || (_current_company != OWNER_WATER && !CheckTileOwnership(tile)) || (!(flags & DC_BANKRUPT) && !EnsureNoVehicleOnGround(tile))) { return CMD_ERROR; } if (flags & DC_EXEC) { if (HasReservedTracks(tile, trackbit)) { v = GetTrainForReservation(tile, track); if (v != NULL) FreeTrainTrackReservation(v); } owner = GetTileOwner(tile); MakeRoadNormal(tile, GetCrossingRoadBits(tile), GetRoadTypes(tile), GetTownIndex(tile), GetRoadOwner(tile, ROADTYPE_ROAD), GetRoadOwner(tile, ROADTYPE_TRAM)); } break; } case MP_RAILWAY: { TrackBits present; if (!IsPlainRail(tile) || (_current_company != OWNER_WATER && !CheckTileOwnership(tile)) || !EnsureNoTrainOnTrack(tile, track)) { 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) { if (HasReservedTracks(tile, trackbit)) { v = GetTrainForReservation(tile, track); if (v != NULL) FreeTrainTrackReservation(v); } owner = GetTileOwner(tile); present ^= trackbit; if (present == 0) { Slope tileh = GetTileSlope(tile, NULL); /* If there is flat water on the lower halftile, convert the tile to shore so the water remains */ if (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh)) { MakeShore(tile); } else { DoClearSquare(tile); } } else { SetTrackBits(tile, present); SetTrackReservation(tile, GetRailReservationTrackBits(tile) & present); } } break; } default: return CMD_ERROR; } if (flags & DC_EXEC) { /* if we got that far, 'owner' variable is set correctly */ assert(Company::IsValidID(owner)); 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. */ AddTrackToSignalBuffer(tile, TRACK_X, owner); AddTrackToSignalBuffer(tile, TRACK_Y, owner); YapfNotifyTrackLayoutChange(tile, TRACK_X); YapfNotifyTrackLayoutChange(tile, TRACK_Y); } else { AddTrackToSignalBuffer(tile, track, owner); YapfNotifyTrackLayoutChange(tile, track); } if (v != NULL) TryPathReserve(v, true); } return cost; } /** * Called from water_cmd if a non-flat rail-tile gets flooded and should be converted to shore. * The function floods the lower halftile, if the tile has a halftile foundation. * * @param t The tile to flood. * @return true if something was flooded. */ bool FloodHalftile(TileIndex t) { assert(IsPlainRailTile(t)); bool flooded = false; if (GetRailGroundType(t) == RAIL_GROUND_WATER) return flooded; Slope tileh = GetTileSlope(t, NULL); TrackBits rail_bits = GetTrackBits(t); if (IsSlopeWithOneCornerRaised(tileh)) { TrackBits lower_track = CornerToTrackBits(OppositeCorner(GetHighestSlopeCorner(tileh))); TrackBits to_remove = lower_track & rail_bits; if (to_remove != 0) { _current_company = OWNER_WATER; if (CmdFailed(DoCommand(t, 0, FIND_FIRST_BIT(to_remove), DC_EXEC, CMD_REMOVE_SINGLE_RAIL))) return flooded; // not yet floodable flooded = true; rail_bits = rail_bits & ~to_remove; if (rail_bits == 0) { MakeShore(t); MarkTileDirtyByTile(t); return flooded; } } if (IsNonContinuousFoundation(GetRailFoundation(tileh, rail_bits))) { flooded = true; SetRailGroundType(t, RAIL_GROUND_WATER); MarkTileDirtyByTile(t); } } else { /* Make shore on steep slopes and 'three-corners-raised'-slopes. */ if (ApplyFoundationToSlope(GetRailFoundation(tileh, rail_bits), &tileh) == 0) { if (IsSteepSlope(tileh) || IsSlopeWithThreeCornersRaised(tileh)) { flooded = true; SetRailGroundType(t, RAIL_GROUND_WATER); MarkTileDirtyByTile(t); } } } return flooded; } 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 SetBit(*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 * @param text unused * @return the cost of this operation or an error */ static CommandCost CmdRailTrackHelper(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { CommandCost ret, total_cost(EXPENSES_CONSTRUCTION); Track track = (Track)GB(p2, 4, 3); bool remove = HasBit(p2, 7); RailType railtype = (RailType)GB(p2, 0, 4); if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR; if (p1 >= MapSize()) return CMD_ERROR; TileIndex end_tile = p1; Trackdir trackdir = TrackToTrackdir(track); 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, remove ? CMD_REMOVE_SINGLE_RAIL : CMD_BUILD_SINGLE_RAIL); if (CmdFailed(ret)) { if (_error_message != STR_ERROR_ALREADY_BUILT && !remove) 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)) ToggleBit(trackdir, 0); } return (total_cost.GetCost() == 0) ? CommandCost(remove ? INVALID_STRING_ID : (_error_message == INVALID_STRING_ID ? STR_ERROR_ALREADY_BUILT : _error_message)) : 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 * @param text unused * @return the cost of this operation or an error * @see CmdRailTrackHelper */ CommandCost CmdBuildRailroadTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { return CmdRailTrackHelper(tile, flags, p1, ClrBit(p2, 7), text); } /** 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 * @param text unused * @return the cost of this operation or an error * @see CmdRailTrackHelper */ CommandCost CmdRemoveRailroadTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { return CmdRailTrackHelper(tile, flags, p1, SetBit(p2, 7), text); } /** 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) * @param text unused * @return the cost of this operation or an error * * @todo When checking for the tile slope, * distingush between "Flat land required" and "land sloped in wrong direction" */ CommandCost CmdBuildTrainDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { Slope tileh; /* check railtype and valid direction for depot (0 through 3), 4 in total */ if (!ValParamRailtype((RailType)p1)) return CMD_ERROR; tileh = GetTileSlope(tile, NULL); DiagDirection dir = Extract<DiagDirection, 0>(p2); /* Prohibit construction if * The tile is non-flat AND * 1) build-on-slopes is disabled * 2) the tile is steep i.e. spans two height levels * 3) the exit points in the wrong direction */ if (tileh != SLOPE_FLAT && ( !_settings_game.construction.build_on_slopes || IsSteepSlope(tileh) || !CanBuildDepotByTileh(dir, tileh) )) { return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED); } CommandCost cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(cost)) return CMD_ERROR; if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST); if (!Depot::CanAllocateItem()) return CMD_ERROR; if (flags & DC_EXEC) { Depot *d = new Depot(tile); d->town_index = ClosestTownFromTile(tile, UINT_MAX)->index; MakeRailDepot(tile, _current_company, d->index, dir, (RailType)p1); MarkTileDirtyByTile(tile); AddSideToSignalBuffer(tile, INVALID_DIAGDIR, _current_company); YapfNotifyTrackLayoutChange(tile, DiagDirToDiagTrack(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 or (for bit 7) toggle variant (CTRL-toggle) * - p1 = (bit 4) - 0 = signals, 1 = semaphores * - p1 = (bit 5-7) - type of the signal, for valid values see enum SignalType in rail_map.h * - p1 = (bit 8) - convert the present signal type and variant * - p1 = (bit 9-11)- start cycle from this signal type * - p1 = (bit 12-14)-wrap around after this signal type * - p1 = (bit 15-16)-cycle the signal direction this many times * - p1 = (bit 17) - 1 = don't modify an existing signal but don't fail either, 0 = always set new signal type * @param p2 used for CmdBuildManySignals() to copy direction of first signal * @param text unused * @return the cost of this operation or an error * @todo p2 should be replaced by two bits for "along" and "against" the track. */ CommandCost CmdBuildSingleSignal(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { Track track = (Track)GB(p1, 0, 3); bool ctrl_pressed = HasBit(p1, 3); // was the CTRL button pressed SignalVariant sigvar = (ctrl_pressed ^ HasBit(p1, 4)) ? SIG_SEMAPHORE : SIG_ELECTRIC; // the signal variant of the new signal SignalType sigtype = (SignalType)GB(p1, 5, 3); // the signal type of the new signal bool convert_signal = HasBit(p1, 8); // convert button pressed SignalType cycle_start = (SignalType)GB(p1, 9, 3); SignalType cycle_stop = (SignalType)GB(p1, 12, 3); CommandCost cost; uint num_dir_cycle = GB(p1, 15, 2); if (sigtype > SIGTYPE_LAST) return CMD_ERROR; /* You can only build signals on plain rail tiles, and the selected track must exist */ if (!ValParamTrackOrientation(track) || !IsPlainRailTile(tile) || !HasTrack(tile, track) || !EnsureNoTrainOnTrack(tile, track)) { return CMD_ERROR; } /* Protect against invalid signal copying */ if (p2 != 0 && (p2 & SignalOnTrack(track)) == 0) return CMD_ERROR; if (!CheckTileOwnership(tile)) return CMD_ERROR; { /* See if this is a valid track combination for signals, (ie, no overlap) */ TrackBits trackbits = GetTrackBits(tile); if (KillFirstBit(trackbits) != TRACK_BIT_NONE && // More than one track present trackbits != TRACK_BIT_HORZ && trackbits != TRACK_BIT_VERT) { return_cmd_error(STR_ERROR_NO_SUITABLE_RAILROAD_TRACK); } } /* In case we don't want to change an existing signal, return without error. */ if (HasBit(p1, 17) && HasSignalOnTrack(tile, track)) return CommandCost(); /* you can not convert a signal if no signal is on track */ if (convert_signal && !HasSignalOnTrack(tile, track)) return CMD_ERROR; if (!HasSignalOnTrack(tile, track)) { /* build new signals */ cost = CommandCost(EXPENSES_CONSTRUCTION, _price.build_signals); } else { if (p2 != 0 && sigvar != GetSignalVariant(tile, track)) { /* convert signals <-> semaphores */ cost = CommandCost(EXPENSES_CONSTRUCTION, _price.build_signals + _price.remove_signals); } else if (convert_signal) { /* convert button pressed */ if (ctrl_pressed || GetSignalVariant(tile, track) != sigvar) { /* convert electric <-> semaphore */ cost = CommandCost(EXPENSES_CONSTRUCTION, _price.build_signals + _price.remove_signals); } else { /* it is free to change signal type: normal-pre-exit-combo */ cost = CommandCost(); } } else { /* it is free to change orientation/pre-exit-combo signals */ cost = CommandCost(); } } if (flags & DC_EXEC) { Train *v = NULL; /* The new/changed signal could block our path. As this can lead to * stale reservations, we clear the path reservation here and try * to redo it later on. */ if (HasReservedTracks(tile, TrackToTrackBits(track))) { v = GetTrainForReservation(tile, track); if (v != NULL) FreeTrainTrackReservation(v); } 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); SetSignalVariant(tile, track, sigvar); } if (p2 == 0) { if (!HasSignalOnTrack(tile, track)) { /* build new signals */ SetPresentSignals(tile, GetPresentSignals(tile) | (IsPbsSignal(sigtype) ? KillFirstBit(SignalOnTrack(track)) : SignalOnTrack(track))); SetSignalType(tile, track, sigtype); SetSignalVariant(tile, track, sigvar); while (num_dir_cycle-- > 0) CycleSignalSide(tile, track); } else { if (convert_signal) { /* convert signal button pressed */ if (ctrl_pressed) { /* toggle the pressent signal variant: SIG_ELECTRIC <-> SIG_SEMAPHORE */ SetSignalVariant(tile, track, (GetSignalVariant(tile, track) == SIG_ELECTRIC) ? SIG_SEMAPHORE : SIG_ELECTRIC); /* Query current signal type so the check for PBS signals below works. */ sigtype = GetSignalType(tile, track); } else { /* convert the present signal to the chosen type and variant */ SetSignalType(tile, track, sigtype); SetSignalVariant(tile, track, sigvar); if (IsPbsSignal(sigtype) && (GetPresentSignals(tile) & SignalOnTrack(track)) == SignalOnTrack(track)) { SetPresentSignals(tile, (GetPresentSignals(tile) & ~SignalOnTrack(track)) | KillFirstBit(SignalOnTrack(track))); } } } else if (ctrl_pressed) { /* cycle between cycle_start and cycle_end */ sigtype = (SignalType)(GetSignalType(tile, track) + 1); if (sigtype < cycle_start || sigtype > cycle_stop) sigtype = cycle_start; SetSignalType(tile, track, sigtype); if (IsPbsSignal(sigtype) && (GetPresentSignals(tile) & SignalOnTrack(track)) == SignalOnTrack(track)) { SetPresentSignals(tile, (GetPresentSignals(tile) & ~SignalOnTrack(track)) | KillFirstBit(SignalOnTrack(track))); } } else { /* cycle the signal side: both -> left -> right -> both -> ... */ CycleSignalSide(tile, track); /* Query current signal type so the check for PBS signals below works. */ sigtype = GetSignalType(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); SetSignalType(tile, track, sigtype); } if (IsPbsSignal(sigtype)) { /* PBS signals should show red unless they are on a reservation. */ uint mask = GetPresentSignals(tile) & SignalOnTrack(track); SetSignalStates(tile, (GetSignalStates(tile) & ~mask) | ((HasBit(GetRailReservationTrackBits(tile), track) ? UINT_MAX : 0) & mask)); } MarkTileDirtyByTile(tile); AddTrackToSignalBuffer(tile, track, _current_company); YapfNotifyTrackLayoutChange(tile, track); if (v != NULL) TryPathReserve(v, true); } 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 */ TrackdirBits trackdirbits = TrackStatusToTrackdirBits(GetTileTrackStatus(tile, TRANSPORT_RAIL, 0)); 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; // backup old value if (GetTunnelBridgeTransportType(tile) != TRANSPORT_RAIL) return false; if (GetTunnelBridgeDirection(tile) != TrackdirToExitdir(trackdir)) return false; /* Skip to end of tunnel or bridge * note that tile is a parameter by reference, so it must be updated */ tile = GetOtherTunnelBridgeEnd(tile); signal_ctr += (GetTunnelBridgeLength(orig_tile, tile) + 2) * 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 7- 9) - default signal type * - p2 = (bit 24-31) - user defined signals_density * @param text unused * @return the cost of this operation or an error */ static CommandCost CmdSignalTrackHelper(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { CommandCost ret, total_cost(EXPENSES_CONSTRUCTION); int signal_ctr; byte signals; bool err = 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 (!IsPlainRailTile(tile)) return CMD_ERROR; /* 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; /* Must start on a valid track to be able to avoid loops */ if (!HasTrack(tile, track)) return CMD_ERROR; SignalType sigtype = (SignalType)GB(p2, 7, 3); if (sigtype > SIGTYPE_LAST) return CMD_ERROR; /* copy the signal-style of the first rail-piece if existing */ if (HasSignalOnTrack(tile, track)) { signals = GetPresentSignals(tile) & SignalOnTrack(track); assert(signals != 0); /* copy signal/semaphores style (independent of CTRL) */ semaphores = GetSignalVariant(tile, track) != SIG_ELECTRIC; sigtype = GetSignalType(tile, track); /* Don't but copy pre-signal type */ if (sigtype < SIGTYPE_PBS) sigtype = SIGTYPE_NORMAL; } else { // no signals exist, drag a two-way signal stretch signals = IsPbsSignal(sigtype) ? SignalAlongTrackdir(trackdir) : 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 - 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); SB(p1, 5, 3, sigtype); if (!remove && signal_ctr == 0) SetBit(p1, 17); /* 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)) { err = 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 { ToggleBit(trackdir, 0); } } } return err ? 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 7- 9) - default signal type * - p2 = (bit 24-31) - user defined signals_density * @param text unused * @return the cost of this operation or an error * @see CmdSignalTrackHelper */ CommandCost CmdBuildSignalTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { return CmdSignalTrackHelper(tile, flags, p1, p2, text); } /** 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 * @param text unused * @return the cost of this operation or an error */ CommandCost CmdRemoveSingleSignal(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { Track track = (Track)GB(p1, 0, 3); if (!ValParamTrackOrientation(track) || !IsPlainRailTile(tile) || !HasTrack(tile, track) || !EnsureNoTrainOnTrack(tile, track) || !HasSignalOnTrack(tile, track)) { return CMD_ERROR; } /* Only water can remove signals from anyone */ if (_current_company != OWNER_WATER && !CheckTileOwnership(tile)) return CMD_ERROR; /* Do it? */ if (flags & DC_EXEC) { Train *v = NULL; if (HasReservedTracks(tile, TrackToTrackBits(track))) { v = GetTrainForReservation(tile, track); } 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 } AddTrackToSignalBuffer(tile, track, GetTileOwner(tile)); YapfNotifyTrackLayoutChange(tile, track); if (v != NULL) TryPathReserve(v, false); MarkTileDirtyByTile(tile); } return CommandCost(EXPENSES_CONSTRUCTION, _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 7- 9) - default signal type * - p2 = (bit 24-31) - user defined signals_density * @param text unused * @return the cost of this operation or an error * @see CmdSignalTrackHelper */ CommandCost CmdRemoveSignalTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { return CmdSignalTrackHelper(tile, flags, p1, SetBit(p2, 5), text); // bit 5 is remove bit } /** Update power of train under which is the railtype being converted */ Vehicle *UpdateTrainPowerProc(Vehicle *v, void *data) { if (v->type != VEH_TRAIN) return NULL; /* Similiar checks as in TrainPowerChanged() */ Train *t = Train::From(v); if (t->IsArticulatedPart()) return NULL; const RailVehicleInfo *rvi = RailVehInfo(t->engine_type); if (GetVehicleProperty(t, PROP_TRAIN_POWER, rvi->power) != 0) TrainPowerChanged(t->First()); return NULL; } /** 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 * @param text unused * @return the cost of this operation or an error */ CommandCost CmdConvertRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text) { CommandCost cost(EXPENSES_CONSTRUCTION); RailType totype = (RailType)p2; if (!ValParamRailtype(totype)) return CMD_ERROR; if (p1 >= MapSize()) return CMD_ERROR; uint ex = TileX(tile); uint ey = TileY(tile); uint sx = TileX(p1); uint sy = TileY(p1); /* make sure sx,sy are smaller than ex,ey */ if (ex < sx) Swap(ex, sx); if (ey < sy) Swap(ey, sy); _error_message = STR_ERROR_NO_SUITABLE_RAILROAD_TRACK; // by default, there is no track to convert for (uint x = sx; x <= ex; ++x) { for (uint y = sy; y <= ey; ++y) { TileIndex tile = TileXY(x, y); TileType tt = GetTileType(tile); /* Check if there is any track on tile */ switch (tt) { case MP_RAILWAY: break; case MP_STATION: if (!HasStationRail(tile)) continue; break; case MP_ROAD: if (!IsLevelCrossing(tile)) continue; break; case MP_TUNNELBRIDGE: if (GetTunnelBridgeTransportType(tile) != TRANSPORT_RAIL) continue; break; default: continue; } /* Original railtype we are converting from */ RailType type = GetRailType(tile); /* Converting to the same type or converting 'hidden' elrail -> rail */ if (type == totype || (_settings_game.vehicle.disable_elrails && totype == RAILTYPE_RAIL && type == RAILTYPE_ELECTRIC)) continue; /* Trying to convert other's rail */ if (!CheckTileOwnership(tile)) continue; SmallVector<Train *, 2> vehicles_affected; /* Vehicle on the tile when not converting Rail <-> ElRail * Tunnels and bridges have special check later */ if (tt != MP_TUNNELBRIDGE) { if (!IsCompatibleRail(type, totype) && !EnsureNoVehicleOnGround(tile)) continue; if (flags & DC_EXEC) { // we can safely convert, too TrackBits reserved = GetReservedTrackbits(tile); Track track; while ((track = RemoveFirstTrack(&reserved)) != INVALID_TRACK) { Train *v = GetTrainForReservation(tile, track); if (v != NULL && !HasPowerOnRail(v->railtype, totype)) { /* No power on new rail type, reroute. */ FreeTrainTrackReservation(v); *vehicles_affected.Append() = v; } } SetRailType(tile, totype); MarkTileDirtyByTile(tile); /* update power of train engines on this tile */ FindVehicleOnPos(tile, NULL, &UpdateTrainPowerProc); } } switch (tt) { case MP_RAILWAY: switch (GetRailTileType(tile)) { case RAIL_TILE_DEPOT: if (flags & DC_EXEC) { /* notify YAPF about the track layout change */ YapfNotifyTrackLayoutChange(tile, GetRailDepotTrack(tile)); /* Update build vehicle window related to this depot */ InvalidateWindowData(WC_VEHICLE_DEPOT, tile); InvalidateWindowData(WC_BUILD_VEHICLE, tile); } cost.AddCost(RailConvertCost(type, totype)); break; default: // RAIL_TILE_NORMAL, RAIL_TILE_SIGNALS if (flags & DC_EXEC) { /* notify YAPF about the track layout change */ TrackBits tracks = GetTrackBits(tile); while (tracks != TRACK_BIT_NONE) { YapfNotifyTrackLayoutChange(tile, RemoveFirstTrack(&tracks)); } } cost.AddCost(RailConvertCost(type, totype) * CountBits(GetTrackBits(tile))); break; } break; case MP_TUNNELBRIDGE: { TileIndex endtile = GetOtherTunnelBridgeEnd(tile); /* If both ends of tunnel/bridge are in the range, do not try to convert twice - * it would cause assert because of different test and exec runs */ if (endtile < tile && TileX(endtile) >= sx && TileX(endtile) <= ex && TileY(endtile) >= sy && TileY(endtile) <= ey) continue; /* When not coverting rail <-> el. rail, any vehicle cannot be in tunnel/bridge */ if (!IsCompatibleRail(GetRailType(tile), totype) && HasVehicleOnTunnelBridge(tile, endtile)) continue; if (flags & DC_EXEC) { Track track = DiagDirToDiagTrack(GetTunnelBridgeDirection(tile)); if (HasTunnelBridgeReservation(tile)) { Train *v = GetTrainForReservation(tile, track); if (v != NULL && !HasPowerOnRail(v->railtype, totype)) { /* No power on new rail type, reroute. */ FreeTrainTrackReservation(v); *vehicles_affected.Append() = v; } } SetRailType(tile, totype); SetRailType(endtile, totype); FindVehicleOnPos(tile, NULL, &UpdateTrainPowerProc); FindVehicleOnPos(endtile, NULL, &UpdateTrainPowerProc); YapfNotifyTrackLayoutChange(tile, track); YapfNotifyTrackLayoutChange(endtile, track); MarkTileDirtyByTile(tile); MarkTileDirtyByTile(endtile); if (IsBridge(tile)) { TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile)); TileIndex t = tile + delta; for (; t != endtile; t += delta) MarkTileDirtyByTile(t); // TODO encapsulate this into a function } } cost.AddCost((GetTunnelBridgeLength(tile, endtile) + 2) * RailConvertCost(type, totype)); } break; default: // MP_STATION, MP_ROAD if (flags & DC_EXEC) { Track track = ((tt == MP_STATION) ? GetRailStationTrack(tile) : GetCrossingRailTrack(tile)); YapfNotifyTrackLayoutChange(tile, track); } cost.AddCost(RailConvertCost(type, totype)); break; } for (uint i = 0; i < vehicles_affected.Length(); ++i) { TryPathReserve(vehicles_affected[i], true); } } } return (cost.GetCost() == 0) ? CMD_ERROR : cost; } static CommandCost RemoveTrainDepot(TileIndex tile, DoCommandFlag flags) { if (!CheckTileOwnership(tile) && _current_company != OWNER_WATER) return CMD_ERROR; if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR; if (flags & DC_EXEC) { /* read variables before the depot is removed */ DiagDirection dir = GetRailDepotDirection(tile); Owner owner = GetTileOwner(tile); Train *v = NULL; if (HasDepotReservation(tile)) { v = GetTrainForReservation(tile, DiagDirToDiagTrack(dir)); if (v != NULL) FreeTrainTrackReservation(v); } delete Depot::GetByTile(tile); DoClearSquare(tile); AddSideToSignalBuffer(tile, dir, owner); YapfNotifyTrackLayoutChange(tile, DiagDirToDiagTrack(dir)); if (v != NULL) TryPathReserve(v, true); } return CommandCost(EXPENSES_CONSTRUCTION, _price.remove_train_depot); } static CommandCost ClearTile_Track(TileIndex tile, DoCommandFlag flags) { CommandCost cost(EXPENSES_CONSTRUCTION); CommandCost ret; if (flags & DC_AUTO) { if (!IsTileOwner(tile, _current_company)) { return_cmd_error(STR_ERROR_AREA_IS_OWNED_BY_ANOTHER); } if (IsPlainRail(tile)) { return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK); } else { return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED); } } switch (GetRailTileType(tile)) { case RAIL_TILE_SIGNALS: case RAIL_TILE_NORMAL: { Slope tileh = GetTileSlope(tile, NULL); /* Is there flat water on the lower halftile, that gets cleared expensively? */ bool water_ground = (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh)); 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); } /* when bankrupting, don't make water dirty, there could be a ship on lower halftile */ if (water_ground && !(flags & DC_BANKRUPT)) { if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR; /* The track was removed, and left a coast tile. Now also clear the water. */ if (flags & DC_EXEC) DoClearSquare(tile); cost.AddCost(_price.clear_water); } return cost; } case RAIL_TILE_DEPOT: return RemoveTrainDepot(tile, flags); default: return CMD_ERROR; } } /** * Get surface height in point (x,y) * On tiles with halftile foundations move (x,y) to a safe point wrt. track */ static uint GetSaveSlopeZ(uint x, uint y, Track track) { switch (track) { case TRACK_UPPER: x &= ~0xF; y &= ~0xF; break; case TRACK_LOWER: x |= 0xF; y |= 0xF; break; case TRACK_LEFT: x |= 0xF; y &= ~0xF; break; case TRACK_RIGHT: x &= ~0xF; y |= 0xF; break; default: break; } return GetSlopeZ(x, y); } static void DrawSingleSignal(TileIndex tile, Track track, byte condition, uint image, uint pos) { bool side = (_settings_game.vehicle.road_side != 0) && _settings_game.construction.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} } }; uint x = TileX(tile) * TILE_SIZE + SignalPositions[side][pos].x; uint y = TileY(tile) * TILE_SIZE + SignalPositions[side][pos].y; SpriteID sprite; SignalType type = GetSignalType(tile, track); SignalVariant variant = GetSignalVariant(tile, track); if (type == SIGTYPE_NORMAL && variant == SIG_ELECTRIC) { /* Normal electric signals are picked from original sprites. */ sprite = SPR_ORIGINAL_SIGNALS_BASE + image + condition; } else { /* All other signals are picked from add on sprites. */ sprite = SPR_SIGNALS_BASE + (type - 1) * 16 + variant * 64 + image + condition + (type > SIGTYPE_LAST_NOPBS ? 64 : 0); } AddSortableSpriteToDraw(sprite, PAL_NONE, x, y, 1, 1, BB_HEIGHT_UNDER_BRIDGE, GetSaveSlopeZ(x, y, track)); } static uint32 _drawtile_track_palette; static void DrawTrackFence_NW(const TileInfo *ti, SpriteID base_image) { RailFenceOffset rfo = RFO_FLAT_X; if (ti->tileh != SLOPE_FLAT) rfo = (ti->tileh & SLOPE_S) ? RFO_SLOPE_SW : RFO_SLOPE_NE; AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette, ti->x, ti->y + 1, 16, 1, 4, ti->z); } static void DrawTrackFence_SE(const TileInfo *ti, SpriteID base_image) { RailFenceOffset rfo = RFO_FLAT_X; if (ti->tileh != SLOPE_FLAT) rfo = (ti->tileh & SLOPE_S) ? RFO_SLOPE_SW : RFO_SLOPE_NE; AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette, ti->x, ti->y + TILE_SIZE - 1, 16, 1, 4, ti->z); } static void DrawTrackFence_NW_SE(const TileInfo *ti, SpriteID base_image) { DrawTrackFence_NW(ti, base_image); DrawTrackFence_SE(ti, base_image); } static void DrawTrackFence_NE(const TileInfo *ti, SpriteID base_image) { RailFenceOffset rfo = RFO_FLAT_Y; if (ti->tileh != SLOPE_FLAT) rfo = (ti->tileh & SLOPE_S) ? RFO_SLOPE_SE : RFO_SLOPE_NW; AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette, ti->x + 1, ti->y, 1, 16, 4, ti->z); } static void DrawTrackFence_SW(const TileInfo *ti, SpriteID base_image) { RailFenceOffset rfo = RFO_FLAT_Y; if (ti->tileh != SLOPE_FLAT) rfo = (ti->tileh & SLOPE_S) ? RFO_SLOPE_SE : RFO_SLOPE_NW; AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette, ti->x + TILE_SIZE - 1, ti->y, 1, 16, 4, ti->z); } static void DrawTrackFence_NE_SW(const TileInfo *ti, SpriteID base_image) { DrawTrackFence_NE(ti, base_image); DrawTrackFence_SW(ti, base_image); } /** * Draw fence at eastern side of track. */ static void DrawTrackFence_NS_1(const TileInfo *ti, SpriteID base_image) { uint z = ti->z + GetSlopeZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_W); AddSortableSpriteToDraw(base_image + RFO_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, SpriteID base_image) { uint z = ti->z + GetSlopeZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_E); AddSortableSpriteToDraw(base_image + RFO_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, SpriteID base_image) { uint z = ti->z + GetSlopeZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_N); AddSortableSpriteToDraw(base_image + RFO_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, SpriteID base_image) { uint z = ti->z + GetSlopeZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_S); AddSortableSpriteToDraw(base_image + RFO_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) { /* Base sprite for track fences. */ SpriteID base_image = SPR_TRACK_FENCE_FLAT_X; switch (GetRailGroundType(ti->tile)) { case RAIL_GROUND_FENCE_NW: DrawTrackFence_NW(ti, base_image); break; case RAIL_GROUND_FENCE_SE: DrawTrackFence_SE(ti, base_image); break; case RAIL_GROUND_FENCE_SENW: DrawTrackFence_NW_SE(ti, base_image); break; case RAIL_GROUND_FENCE_NE: DrawTrackFence_NE(ti, base_image); break; case RAIL_GROUND_FENCE_SW: DrawTrackFence_SW(ti, base_image); break; case RAIL_GROUND_FENCE_NESW: DrawTrackFence_NE_SW(ti, base_image); break; case RAIL_GROUND_FENCE_VERT1: DrawTrackFence_NS_1(ti, base_image); break; case RAIL_GROUND_FENCE_VERT2: DrawTrackFence_NS_2(ti, base_image); break; case RAIL_GROUND_FENCE_HORIZ1: DrawTrackFence_WE_1(ti, base_image); break; case RAIL_GROUND_FENCE_HORIZ2: DrawTrackFence_WE_2(ti, base_image); break; case RAIL_GROUND_WATER: { Corner track_corner; if (IsHalftileSlope(ti->tileh)) { /* Steep slope or one-corner-raised slope with halftile foundation */ track_corner = GetHalftileSlopeCorner(ti->tileh); } else { /* Three-corner-raised slope */ track_corner = OppositeCorner(GetHighestSlopeCorner(ComplementSlope(ti->tileh))); } switch (track_corner) { case CORNER_W: DrawTrackFence_NS_1(ti, base_image); break; case CORNER_S: DrawTrackFence_WE_2(ti, base_image); break; case CORNER_E: DrawTrackFence_NS_2(ti, base_image); break; case CORNER_N: DrawTrackFence_WE_1(ti, base_image); break; default: NOT_REACHED(); } break; } default: break; } } /** * Draw ground sprite and track bits * @param ti TileInfo * @param track TrackBits to draw */ static void DrawTrackBits(TileInfo *ti, TrackBits track) { /* SubSprite for drawing the track halftile of 'three-corners-raised'-sloped rail sprites. */ static const int INF = 1000; // big number compared to tilesprite size static const SubSprite _halftile_sub_sprite[4] = { { -INF , -INF , 32 - 33, INF }, // CORNER_W, clip 33 pixels from right { -INF , 0 + 7, INF , INF }, // CORNER_S, clip 7 pixels from top { -31 + 33, -INF , INF , INF }, // CORNER_E, clip 33 pixels from left { -INF , -INF , INF , 30 - 23 } // CORNER_N, clip 23 pixels from bottom }; const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile)); RailGroundType rgt = GetRailGroundType(ti->tile); Foundation f = GetRailFoundation(ti->tileh, track); Corner halftile_corner = CORNER_INVALID; if (IsNonContinuousFoundation(f)) { /* Save halftile corner */ halftile_corner = (f == FOUNDATION_STEEP_BOTH ? GetHighestSlopeCorner(ti->tileh) : GetHalftileFoundationCorner(f)); /* Draw lower part first */ track &= ~CornerToTrackBits(halftile_corner); f = (f == FOUNDATION_STEEP_BOTH ? FOUNDATION_STEEP_LOWER : FOUNDATION_NONE); } DrawFoundation(ti, f); /* DrawFoundation modifies ti */ SpriteID image; SpriteID pal = PAL_NONE; const SubSprite *sub = NULL; bool junction = false; /* Select the sprite to use. */ if (track == 0) { /* Clear ground (only track on halftile foundation) */ if (rgt == RAIL_GROUND_WATER) { if (IsSteepSlope(ti->tileh)) { DrawShoreTile(ti->tileh); image = 0; } else { image = SPR_FLAT_WATER_TILE; } } else { switch (rgt) { case RAIL_GROUND_BARREN: image = SPR_FLAT_BARE_LAND; break; case RAIL_GROUND_ICE_DESERT: image = SPR_FLAT_SNOW_DESERT_TILE; break; default: image = SPR_FLAT_GRASS_TILE; break; } image += _tileh_to_sprite[ti->tileh]; } } else { if (ti->tileh != SLOPE_FLAT) { /* track on non-flat ground */ image = _track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.track_y; } else { /* track on flat ground */ (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); } switch (rgt) { case RAIL_GROUND_BARREN: pal = PALETTE_TO_BARE_LAND; break; case RAIL_GROUND_ICE_DESERT: image += rti->snow_offset; break; case RAIL_GROUND_WATER: { /* three-corner-raised slope */ DrawShoreTile(ti->tileh); Corner track_corner = OppositeCorner(GetHighestSlopeCorner(ComplementSlope(ti->tileh))); sub = &(_halftile_sub_sprite[track_corner]); break; } default: break; } } if (image != 0) DrawGroundSprite(image, pal, sub); /* 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); } /* PBS debugging, draw reserved tracks darker */ if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation) { /* Get reservation, but mask track on halftile slope */ TrackBits pbs = GetRailReservationTrackBits(ti->tile) & track; if (pbs & TRACK_BIT_X) { if (ti->tileh == SLOPE_FLAT || ti->tileh == SLOPE_ELEVATED) { DrawGroundSprite(rti->base_sprites.single_y, PALETTE_CRASH); } else { DrawGroundSprite(_track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.single_sloped - 20, PALETTE_CRASH); } } if (pbs & TRACK_BIT_Y) { if (ti->tileh == SLOPE_FLAT || ti->tileh == SLOPE_ELEVATED) { DrawGroundSprite(rti->base_sprites.single_x, PALETTE_CRASH); } else { DrawGroundSprite(_track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.single_sloped - 20, PALETTE_CRASH); } } if (pbs & TRACK_BIT_UPPER) DrawGroundSprite(rti->base_sprites.single_n, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_N ? -TILE_HEIGHT : 0); if (pbs & TRACK_BIT_LOWER) DrawGroundSprite(rti->base_sprites.single_s, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_S ? -TILE_HEIGHT : 0); if (pbs & TRACK_BIT_LEFT) DrawGroundSprite(rti->base_sprites.single_w, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_W ? -TILE_HEIGHT : 0); if (pbs & TRACK_BIT_RIGHT) DrawGroundSprite(rti->base_sprites.single_e, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_E ? -TILE_HEIGHT : 0); } if (IsValidCorner(halftile_corner)) { DrawFoundation(ti, HalftileFoundation(halftile_corner)); /* Draw higher halftile-overlay: Use the sloped sprites with three corners raised. They probably best fit the lightning. */ Slope fake_slope = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner)); image = _track_sloped_sprites[fake_slope - 1] + rti->base_sprites.track_y; pal = PAL_NONE; switch (rgt) { case RAIL_GROUND_BARREN: pal = PALETTE_TO_BARE_LAND; break; case RAIL_GROUND_ICE_DESERT: case RAIL_GROUND_HALF_SNOW: image += rti->snow_offset; break; // higher part has snow in this case too default: break; } DrawGroundSprite(image, pal, &(_halftile_sub_sprite[halftile_corner])); if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasReservedTracks(ti->tile, CornerToTrackBits(halftile_corner))) { static const byte _corner_to_track_sprite[] = {3, 1, 2, 0}; DrawGroundSprite(_corner_to_track_sprite[halftile_corner] + rti->base_sprites.single_n, PALETTE_CRASH, NULL, 0, -TILE_HEIGHT); } } } /** Enums holding the offsets from base signal sprite, * according to the side it is representing. * The addtion of 2 per enum is necessary in order to "jump" over the * green state sprite, all signal sprites being in pair, * starting with the off-red state */ enum { SIGNAL_TO_SOUTHWEST = 0, SIGNAL_TO_NORTHEAST = 2, SIGNAL_TO_SOUTHEAST = 4, SIGNAL_TO_NORTHWEST = 6, SIGNAL_TO_EAST = 8, SIGNAL_TO_WEST = 10, SIGNAL_TO_SOUTH = 12, SIGNAL_TO_NORTH = 14, }; 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, z) if (!(rails & TRACK_BIT_Y)) { if (!(rails & TRACK_BIT_X)) { if (rails & TRACK_BIT_LEFT) { MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTH, 0, TRACK_LEFT); MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTH, 1, TRACK_LEFT); } if (rails & TRACK_BIT_RIGHT) { MAYBE_DRAW_SIGNAL(0, SIGNAL_TO_NORTH, 2, TRACK_RIGHT); MAYBE_DRAW_SIGNAL(1, SIGNAL_TO_SOUTH, 3, TRACK_RIGHT); } if (rails & TRACK_BIT_UPPER) { MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_WEST, 4, TRACK_UPPER); MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_EAST, 5, TRACK_UPPER); } if (rails & TRACK_BIT_LOWER) { MAYBE_DRAW_SIGNAL(1, SIGNAL_TO_WEST, 6, TRACK_LOWER); MAYBE_DRAW_SIGNAL(0, SIGNAL_TO_EAST, 7, TRACK_LOWER); } } else { MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTHWEST, 8, TRACK_X); MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTHEAST, 9, TRACK_X); } } else { MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTHEAST, 10, TRACK_Y); MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTHWEST, 11, TRACK_Y); } } static void DrawTile_Track(TileInfo *ti) { const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile)); SpriteID image; _drawtile_track_palette = COMPANY_SPRITE_COLOUR(GetTileOwner(ti->tile)); if (IsPlainRail(ti->tile)) { TrackBits rails = GetTrackBits(ti->tile); DrawTrackBits(ti, rails); if (HasBit(_display_opt, DO_FULL_DETAIL)) DrawTrackDetails(ti); if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti); if (HasSignals(ti->tile)) DrawSignals(ti->tile, rails); } else { /* draw depot */ const DrawTileSprites *dts; const DrawTileSeqStruct *dtss; uint32 relocation; SpriteID pal = PAL_NONE; if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED); if (IsInvisibilitySet(TO_BUILDINGS)) { /* Draw rail instead of depot */ dts = &_depot_invisible_gfx_table[GetRailDepotDirection(ti->tile)]; } else { 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) && _settings_game.game_creation.landscape == LT_TROPIC) { if (image != SPR_FLAT_GRASS_TILE) { image += rti->snow_offset; // tile with tracks } else { image = SPR_FLAT_SNOW_DESERT_TILE; // flat ground } } DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, _drawtile_track_palette)); /* PBS debugging, draw reserved tracks darker */ if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasDepotReservation(ti->tile)) { switch (GetRailDepotDirection(ti->tile)) { case DIAGDIR_SW: DrawGroundSprite(rti->base_sprites.single_y, PALETTE_CRASH); break; case DIAGDIR_SE: DrawGroundSprite(rti->base_sprites.single_x, PALETTE_CRASH); break; default: break; } } if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti); foreach_draw_tile_seq(dtss, dts->seq) { SpriteID image = dtss->image.sprite; SpriteID pal = dtss->image.pal; /* Stop drawing sprite sequence once we meet a sprite that doesn't have to be opaque */ if (IsInvisibilitySet(TO_BUILDINGS) && !HasBit(image, SPRITE_MODIFIER_OPAQUE)) return; /* 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; } pal = SpriteLayoutPaletteTransform(image, pal, _drawtile_track_palette); 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(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(TO_BUILDINGS) ); } else { /* For stations and original spritelayouts delta_x and delta_y are signed */ AddChildSpriteScreen(image, pal, dtss->delta_x, dtss->delta_y, !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(TO_BUILDINGS)); } } } DrawBridgeMiddle(ti); } static void DrawTileSequence(int x, int y, SpriteID ground, const DrawTileSeqStruct *dtss, uint32 offset) { SpriteID palette = COMPANY_SPRITE_COLOUR(_local_company); DrawSprite(ground, PAL_NONE, x, y); for (; dtss->image.sprite != 0; dtss++) { Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z); SpriteID image = dtss->image.sprite + offset; DrawSprite(image, HasBit(image, PALETTE_MODIFIER_COLOUR) ? 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); } static uint GetSlopeZ_Track(TileIndex tile, uint x, uint y) { uint z; Slope tileh = GetTileSlope(tile, &z); if (tileh == SLOPE_FLAT) return z; if (IsPlainRail(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 IsPlainRail(tile) ? GetRailFoundation(tileh, GetTrackBits(tile)) : FlatteningFoundation(tileh); } static void TileLoop_Track(TileIndex tile) { RailGroundType old_ground = GetRailGroundType(tile); RailGroundType new_ground; if (old_ground == RAIL_GROUND_WATER) { TileLoop_Water(tile); return; } switch (_settings_game.game_creation.landscape) { case LT_ARCTIC: { uint z; Slope slope = GetTileSlope(tile, &z); bool half = false; /* for non-flat track, use lower part of track * in other cases, use the highest part with track */ if (IsPlainRail(tile)) { TrackBits track = GetTrackBits(tile); Foundation f = GetRailFoundation(slope, track); switch (f) { case FOUNDATION_NONE: /* no foundation - is the track on the upper side of three corners raised tile? */ if (IsSlopeWithThreeCornersRaised(slope)) z += TILE_HEIGHT; break; case FOUNDATION_INCLINED_X: case FOUNDATION_INCLINED_Y: /* sloped track - is it on a steep slope? */ if (IsSteepSlope(slope)) z += TILE_HEIGHT; break; case FOUNDATION_STEEP_LOWER: /* only lower part of steep slope */ z += TILE_HEIGHT; break; default: /* if it is a steep slope, then there is a track on higher part */ if (IsSteepSlope(slope)) z += TILE_HEIGHT; z += TILE_HEIGHT; break; } half = IsInsideMM(f, FOUNDATION_STEEP_BOTH, FOUNDATION_HALFTILE_N + 1); } else { /* is the depot on a non-flat tile? */ if (slope != SLOPE_FLAT) z += TILE_HEIGHT; } /* 'z' is now the lowest part of the highest track bit - * for sloped track, it is 'z' of lower part * for two track bits, it is 'z' of higher track bit * For non-continuous foundations (and STEEP_BOTH), 'half' is set */ if (z > GetSnowLine()) { if (half && z - GetSnowLine() == TILE_HEIGHT) { /* track on non-continuous foundation, lower part is not under snow */ new_ground = RAIL_GROUND_HALF_SNOW; } else { 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 (!IsPlainRail(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: { Owner 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 = (IsPlainRailTile(n) ? GetTrackBits(n) : TRACK_BIT_NONE); 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 = (IsPlainRailTile(n) ? GetTrackBits(n) : TRACK_BIT_NONE); 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 = (IsPlainRailTile(n) ? GetTrackBits(n) : TRACK_BIT_NONE); 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 = (IsPlainRailTile(n) ? GetTrackBits(n) : TRACK_BIT_NONE); 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 TrackStatus GetTileTrackStatus_Track(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side) { /* Case of half tile slope with water. */ if (mode == TRANSPORT_WATER && IsPlainRail(tile) && GetRailGroundType(tile) == RAIL_GROUND_WATER) { TrackBits tb = GetTrackBits(tile); switch (tb) { default: NOT_REACHED(); case TRACK_BIT_UPPER: tb = TRACK_BIT_LOWER; break; case TRACK_BIT_LOWER: tb = TRACK_BIT_UPPER; break; case TRACK_BIT_LEFT: tb = TRACK_BIT_RIGHT; break; case TRACK_BIT_RIGHT: tb = TRACK_BIT_LEFT; break; } return CombineTrackStatus(TrackBitsToTrackdirBits(tb), TRACKDIR_BIT_NONE); } if (mode != TRANSPORT_RAIL) return 0; TrackBits trackbits = TRACK_BIT_NONE; TrackdirBits red_signals = TRACKDIR_BIT_NONE; switch (GetRailTileType(tile)) { default: NOT_REACHED(); case RAIL_TILE_NORMAL: trackbits = GetTrackBits(tile); break; case RAIL_TILE_SIGNALS: { trackbits = GetTrackBits(tile); byte a = GetPresentSignals(tile); uint b = GetSignalStates(tile); b &= a; /* When signals are not present (in neither direction), * we pretend them to be green. Otherwise, it depends on * the signal type. For signals that are only active from * one side, we set the missing signals explicitely to * `green'. Otherwise, they implicitely become `red'. */ if (!IsOnewaySignal(tile, TRACK_UPPER) || (a & SignalOnTrack(TRACK_UPPER)) == 0) b |= ~a & SignalOnTrack(TRACK_UPPER); if (!IsOnewaySignal(tile, TRACK_LOWER) || (a & SignalOnTrack(TRACK_LOWER)) == 0) b |= ~a & SignalOnTrack(TRACK_LOWER); if ((b & 0x8) == 0) red_signals |= (TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_X_NE | TRACKDIR_BIT_Y_SE | TRACKDIR_BIT_UPPER_E); if ((b & 0x4) == 0) red_signals |= (TRACKDIR_BIT_LEFT_S | TRACKDIR_BIT_X_SW | TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_UPPER_W); if ((b & 0x2) == 0) red_signals |= (TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_LOWER_E); if ((b & 0x1) == 0) red_signals |= (TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LOWER_W); break; } case RAIL_TILE_DEPOT: { DiagDirection dir = GetRailDepotDirection(tile); if (side != INVALID_DIAGDIR && side != dir) break; trackbits = DiagDirToDiagTrackBits(dir); break; } } return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), red_signals); } static bool ClickTile_Track(TileIndex tile) { if (!IsRailDepot(tile)) return false; ShowDepotWindow(tile, VEH_TRAIN); return true; } static void GetTileDesc_Track(TileIndex tile, TileDesc *td) { td->owner[0] = GetTileOwner(tile); switch (GetRailTileType(tile)) { case RAIL_TILE_NORMAL: td->str = STR_LAI_RAIL_DESCRIPTION_TRACK; break; case RAIL_TILE_SIGNALS: { static const StringID signal_type[6][6] = { { STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_SIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PRESIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_EXITSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_COMBOSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PBSSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_NOENTRYSIGNALS }, { STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PRESIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRESIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_EXITSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_COMBOSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_PBSSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_NOENTRYSIGNALS }, { STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_EXITSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_EXITSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXITSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_COMBOSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_PBSSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_NOENTRYSIGNALS }, { STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_COMBOSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_COMBOSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_COMBOSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBOSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_PBSSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_NOENTRYSIGNALS }, { STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PBSSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_PBSSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_PBSSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_PBSSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBSSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBS_NOENTRYSIGNALS }, { STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_NOENTRYSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_NOENTRYSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_NOENTRYSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_NOENTRYSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBS_NOENTRYSIGNALS, STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NOENTRYSIGNALS } }; SignalType primary_signal; SignalType secondary_signal; if (HasSignalOnTrack(tile, TRACK_UPPER)) { primary_signal = GetSignalType(tile, TRACK_UPPER); secondary_signal = HasSignalOnTrack(tile, TRACK_LOWER) ? GetSignalType(tile, TRACK_LOWER) : primary_signal; } else { secondary_signal = primary_signal = GetSignalType(tile, TRACK_LOWER); } td->str = signal_type[secondary_signal][primary_signal]; break; } case RAIL_TILE_DEPOT: td->str = STR_LAI_RAIL_DESCRIPTION_TRAIN_DEPOT; break; default: NOT_REACHED(); } } static void ChangeTileOwner_Track(TileIndex tile, Owner old_owner, Owner new_owner) { if (!IsTileOwner(tile, old_owner)) return; if (new_owner != INVALID_OWNER) { SetTileOwner(tile, new_owner); } else { DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, 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 int8 _deltacoord_leaveoffset[8] = { -1, 0, 1, 0, /* x */ 0, 1, 0, -1 /* y */ }; /** Compute number of ticks when next wagon will leave a depot. * Negative means next wagon should have left depot n ticks before. * @param v vehicle outside (leaving) the depot * @return number of ticks when the next wagon will leave */ int TicksToLeaveDepot(const Train *v) { DiagDirection dir = GetRailDepotDirection(v->tile); int length = v->tcache.cached_veh_length; switch (dir) { case DIAGDIR_NE: return ((int)(v->x_pos & 0x0F) - ((_fractcoords_enter[dir] & 0x0F) - (length + 1))); case DIAGDIR_SE: return -((int)(v->y_pos & 0x0F) - ((_fractcoords_enter[dir] >> 4) + (length + 1))); case DIAGDIR_SW: return -((int)(v->x_pos & 0x0F) - ((_fractcoords_enter[dir] & 0x0F) + (length + 1))); default: case DIAGDIR_NW: return ((int)(v->y_pos & 0x0F) - ((_fractcoords_enter[dir] >> 4) - (length + 1))); } return 0; // make compilers happy } /** Tile callback routine when vehicle enters tile * @see vehicle_enter_tile_proc */ static VehicleEnterTileStatus VehicleEnter_Track(Vehicle *u, 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 (u->type != VEH_TRAIN || !IsRailDepotTile(tile)) return VETSB_CONTINUE; Train *v = Train::From(u); /* 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->tcache.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->track = TRACK_BIT_DEPOT, v->vehstatus |= VS_HIDDEN; // hide it v->direction = ReverseDir(v->direction); if (v->Next() == NULL) VehicleEnterDepot(v->First()); 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->track = (DiagDirToAxis(dir) == AXIS_X ? TRACK_BIT_X : TRACK_BIT_Y); } } } return VETSB_CONTINUE; } /** * Tests if autoslope is allowed. * * @param tile The tile. * @param flags Terraform command flags. * @param z_old Old TileZ. * @param tileh_old Old TileSlope. * @param z_new New TileZ. * @param tileh_new New TileSlope. * @param rail_bits Trackbits. */ static CommandCost TestAutoslopeOnRailTile(TileIndex tile, uint flags, uint z_old, Slope tileh_old, uint z_new, Slope tileh_new, TrackBits rail_bits) { if (!_settings_game.construction.build_on_slopes || !AutoslopeEnabled()) return CMD_ERROR; /* Is the slope-rail_bits combination valid in general? I.e. is it safe to call GetRailFoundation() ? */ if (CmdFailed(CheckRailSlope(tileh_new, rail_bits, TRACK_BIT_NONE, tile))) return CMD_ERROR; /* Get the slopes on top of the foundations */ z_old += ApplyFoundationToSlope(GetRailFoundation(tileh_old, rail_bits), &tileh_old); z_new += ApplyFoundationToSlope(GetRailFoundation(tileh_new, rail_bits), &tileh_new); Corner track_corner; switch (rail_bits) { case TRACK_BIT_LEFT: track_corner = CORNER_W; break; case TRACK_BIT_LOWER: track_corner = CORNER_S; break; case TRACK_BIT_RIGHT: track_corner = CORNER_E; break; case TRACK_BIT_UPPER: track_corner = CORNER_N; break; /* Surface slope must not be changed */ default: return (((z_old != z_new) || (tileh_old != tileh_new)) ? CMD_ERROR : CommandCost(EXPENSES_CONSTRUCTION, _price.terraform)); } /* The height of the track_corner must not be changed. The rest ensures GetRailFoundation() already. */ z_old += GetSlopeZInCorner(RemoveHalftileSlope(tileh_old), track_corner); z_new += GetSlopeZInCorner(RemoveHalftileSlope(tileh_new), track_corner); if (z_old != z_new) return CMD_ERROR; CommandCost cost = CommandCost(EXPENSES_CONSTRUCTION, _price.terraform); /* Make the ground dirty, if surface slope has changed */ if (tileh_old != tileh_new) { /* If there is flat water on the lower halftile add the cost for clearing it */ if (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh_old)) cost.AddCost(_price.clear_water); if ((flags & DC_EXEC) != 0) SetRailGroundType(tile, RAIL_GROUND_BARREN); } return cost; } static CommandCost TerraformTile_Track(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new) { uint z_old; Slope tileh_old = GetTileSlope(tile, &z_old); if (IsPlainRail(tile)) { TrackBits rail_bits = GetTrackBits(tile); /* Is there flat water on the lower halftile, that must be cleared expensively? */ bool was_water = (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh_old)); _error_message = STR_ERROR_MUST_REMOVE_RAILROAD_TRACK; /* First test autoslope. However if it succeeds we still have to test the rest, because non-autoslope terraforming is cheaper. */ CommandCost autoslope_result = TestAutoslopeOnRailTile(tile, flags, z_old, tileh_old, z_new, tileh_new, rail_bits); /* When there is only a single horizontal/vertical track, one corner can be terraformed. */ Corner allowed_corner; switch (rail_bits) { case TRACK_BIT_RIGHT: allowed_corner = CORNER_W; break; case TRACK_BIT_UPPER: allowed_corner = CORNER_S; break; case TRACK_BIT_LEFT: allowed_corner = CORNER_E; break; case TRACK_BIT_LOWER: allowed_corner = CORNER_N; break; default: return autoslope_result; } Foundation f_old = GetRailFoundation(tileh_old, rail_bits); /* Do not allow terraforming if allowed_corner is part of anti-zig-zag foundations */ if (tileh_old != SLOPE_NS && tileh_old != SLOPE_EW && IsSpecialRailFoundation(f_old)) return autoslope_result; /* Everything is valid, which only changes allowed_corner */ for (Corner corner = (Corner)0; corner < CORNER_END; corner = (Corner)(corner + 1)) { if (allowed_corner == corner) continue; if (z_old + GetSlopeZInCorner(tileh_old, corner) != z_new + GetSlopeZInCorner(tileh_new, corner)) return autoslope_result; } /* Make the ground dirty */ if ((flags & DC_EXEC) != 0) SetRailGroundType(tile, RAIL_GROUND_BARREN); /* allow terraforming */ return CommandCost(EXPENSES_CONSTRUCTION, was_water ? _price.clear_water : (Money)0); } else if (_settings_game.construction.build_on_slopes && AutoslopeEnabled() && AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRailDepotDirection(tile))) { return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform); } return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); } extern const TileTypeProcs _tile_type_rail_procs = { DrawTile_Track, // draw_tile_proc GetSlopeZ_Track, // get_slope_z_proc ClearTile_Track, // clear_tile_proc NULL, // add_accepted_cargo_proc GetTileDesc_Track, // get_tile_desc_proc GetTileTrackStatus_Track, // get_tile_track_status_proc ClickTile_Track, // click_tile_proc NULL, // animate_tile_proc TileLoop_Track, // tile_loop_clear ChangeTileOwner_Track, // change_tile_owner_clear NULL, // add_produced_cargo_proc VehicleEnter_Track, // vehicle_enter_tile_proc GetFoundation_Track, // get_foundation_proc TerraformTile_Track, // terraform_tile_proc };