/* $Id$ */ #include "stdafx.h" #include "openttd.h" #include "bridge_map.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 "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, 0, TRACK_BIT_Y, TRACK_BIT_LOWER, TRACK_BIT_LOWER, TRACK_BIT_Y, 0, TRACK_BIT_LEFT, TRACK_BIT_X, TRACK_BIT_UPPER, TRACK_BIT_RIGHT, }, // allowed rail for an evenly raised platform { 0, 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 } }; uint GetRailFoundation(Slope tileh, TrackBits bits) { uint i; if (!IsSteepSlope(tileh)) { if ((~_valid_tileh_slopes[0][tileh] & bits) == 0) return 0; if ((~_valid_tileh_slopes[1][tileh] & bits) == 0) return tileh; } switch (bits) { default: NOT_REACHED(); case TRACK_BIT_X: i = 0; break; case TRACK_BIT_Y: i = 1; break; case TRACK_BIT_LEFT: return 15 + 8 + (tileh == SLOPE_STEEP_W ? 4 : 0); case TRACK_BIT_LOWER: return 15 + 8 + (tileh == SLOPE_STEEP_S ? 5 : 1); case TRACK_BIT_RIGHT: return 15 + 8 + (tileh == SLOPE_STEEP_E ? 6 : 2); case TRACK_BIT_UPPER: return 15 + 8 + (tileh == SLOPE_STEEP_N ? 7 : 3); } switch (tileh) { case SLOPE_W: case SLOPE_STEEP_W: i += 0; break; case SLOPE_S: case SLOPE_STEEP_S: i += 2; break; case SLOPE_E: case SLOPE_STEEP_E: i += 4; break; case SLOPE_N: case SLOPE_STEEP_N: i += 6; break; default: return 0; } return i + 15; } static uint32 CheckRailSlope(Slope tileh, TrackBits rail_bits, TrackBits existing, TileIndex tile) { if (IsSteepSlope(tileh)) { if (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 0; 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 if (existing != 0) { return 0; } else if (!_patches.build_on_slopes || _is_old_ai_player) { return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); } else { return _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 p1 railtype of being built piece (normal, mono, maglev) * @param p2 rail track to build */ int32 CmdBuildSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { Slope tileh; RailType railtype; Track track; TrackBits trackbit; int32 cost = 0; int32 ret; if (!ValParamRailtype(p1) || !ValParamTrackOrientation(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) || !EnsureNoVehicle(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 += 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 += ret; } if (flags & DC_EXEC) { SetRailGroundType(tile, RAIL_GROUND_BARREN); SetTrackBits(tile, GetTrackBits(tile) | trackbit); } break; case MP_STREET: #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 (!EnsureNoVehicle(tile)) return CMD_ERROR; if (GetRoadTileType(tile) == ROAD_TILE_NORMAL) { if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS); if ((track == TRACK_X && GetRoadBits(tile) == ROAD_Y) || (track == TRACK_Y && GetRoadBits(tile) == ROAD_X)) { if (flags & DC_EXEC) { MakeRoadCrossing(tile, GetTileOwner(tile), _current_player, (track == TRACK_X ? AXIS_Y : AXIS_X), railtype, GetTownIndex(tile)); } break; } } if (IsLevelCrossing(tile) && GetCrossingRailBits(tile) == trackbit) { return_cmd_error(STR_1007_ALREADY_BUILT); } /* FALLTHROUGH */ default: ret = CheckRailSlope(tileh, trackbit, 0, tile); if (CmdFailed(ret)) return ret; cost += ret; ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return ret; cost += 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 + _price.build_rail; } /** Remove a single piece of track * @param tile tile to remove track from * @param p1 unused * @param p2 rail orientation */ int32 CmdRemoveSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { Track track = (Track)p2; TrackBits trackbit; int32 cost = _price.remove_rail; bool crossing = false; if (!ValParamTrackOrientation(p2)) return CMD_ERROR; trackbit = TrackToTrackBits(track); SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); switch (GetTileType(tile)) { case MP_STREET: { if (!IsLevelCrossing(tile) || GetCrossingRailBits(tile) != trackbit || (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) || !EnsureNoVehicle(tile)) { return CMD_ERROR; } if (flags & DC_EXEC) { MakeRoadNormal(tile, GetCrossingRoadOwner(tile), GetCrossingRoadBits(tile), GetTownIndex(tile)); } break; } case MP_RAILWAY: { TrackBits present; if (!IsPlainRailTile(tile) || (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) || !EnsureNoVehicle(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 += 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 int32 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(*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 0; } /** Build a stretch of railroad tracks. * @param tile start tile of drag * @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 int32 CmdRailTrackHelper(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { int32 ret, total_cost = 0; 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 += ret; } if (tile == end_tile) break; tile += ToTileIndexDiff(_trackdelta[trackdir]); // toggle railbit for the non-diagonal tracks if (!IsDiagonalTrackdir(trackdir)) trackdir ^= 1; } return (total_cost == 0) ? CMD_ERROR : total_cost; } /** Build rail on a stretch of track. * Stub for the unified rail builder/remover * @see CmdRailTrackHelper */ int32 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 * @see CmdRailTrackHelper */ int32 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 p1 rail type * @param p2 entrance direction (DiagDirection) * * @todo When checking for the tile slope, * distingush between "Flat land required" and "land sloped in wrong direction" */ int32 CmdBuildTrainDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { Depot *d; int32 cost, ret; Slope tileh; SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); if (!EnsureNoVehicle(tile)) return CMD_ERROR; /* check railtype and valid direction for depot (0 through 3), 4 in total */ if (!ValParamRailtype(p1) || p2 > 3) return CMD_ERROR; tileh = GetTileSlope(tile, NULL); /* 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(p2, tileh) )) { return_cmd_error(STR_0007_FLAT_LAND_REQUIRED); } ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return CMD_ERROR; cost = ret; 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, p2, p1); MarkTileDirtyByTile(tile); d->xy = tile; d->town_index = ClosestTownFromTile(tile, (uint)-1)->index; UpdateSignalsOnSegment(tile, p2); YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(p2))); } return cost + _price.build_train_depot; } /** Build signals, alternate between double/single, signal/semaphore, * pre/exit/combo-signals, and what-else not * @param tile tile where to build the signals * @param p1 various bitstuffed elements * - p1 = (bit 0-2) - track-orientation, valid values: 0-5 (Track enum) * - p1 = (bit 3) - choose semaphores/signals or cycle normal/pre/exit/combo depending on context * @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. */ int32 CmdBuildSingleSignal(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { SignalVariant sigvar; bool pre_signal; Track track = (Track)(p1 & 0x7); int32 cost; // Same bit, used in different contexts sigvar = HASBIT(p1, 3) ? SIG_SEMAPHORE : SIG_ELECTRIC; pre_signal = HASBIT(p1, 3); if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicle(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 = _price.build_signals; } else { if (p2 != 0 && sigvar != GetSignalVariant(tile)) { // convert signals <-> semaphores cost = _price.build_signals + _price.remove_signals; } else { // it is free to change orientation/pre-exit-combo signals cost = 0; } } if (flags & DC_EXEC) { if (!HasSignals(tile)) { // there are no signals at all on this tile yet _m[tile].m5 |= RAIL_TILE_SIGNALS; // change into signals _m[tile].m2 |= 0xF0; // all signals are on _m[tile].m3 &= ~0xF0; // no signals built by default SetSignalType(tile, SIGTYPE_NORMAL); SetSignalVariant(tile, sigvar); } if (p2 == 0) { if (!HasSignalOnTrack(tile, track)) { // build new signals _m[tile].m3 |= SignalOnTrack(track); } else { if (pre_signal) { // cycle between normal -> pre -> exit -> combo -> ... SignalType type = GetSignalType(tile); SetSignalType(tile, type == SIGTYPE_COMBO ? SIGTYPE_NORMAL : 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 */ _m[tile].m3 &= ~SignalOnTrack(track); _m[tile].m3 |= p2 & SignalOnTrack(track); SetSignalVariant(tile, sigvar); } MarkTileDirtyByTile(tile); SetSignalsOnBothDir(tile, track); YapfNotifyTrackLayoutChange(tile, track); } return cost; } /** Build many signals by dragging; AutoSignals * @param tile start tile of drag * @param p1 end tile of drag * @param p2 various bitstuffed elements * - p2 = (bit 0) - 0 = build, 1 = remove signals * - p2 = (bit 3) - 0 = signals, 1 = semaphores * - p2 = (bit 4- 6) - track-orientation, valid values: 0-5 (Track enum) * - p2 = (bit 24-31) - user defined signals_density */ static int32 CmdSignalTrackHelper(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { int32 ret, total_cost, signal_ctr; byte signals; bool error = true; TileIndex end_tile; int mode = p2 & 0x1; Track track = GB(p2, 4, 3); Trackdir trackdir = TrackToTrackdir(track); byte semaphores = (HASBIT(p2, 3) ? 8 : 0); byte signal_density = (p2 >> 24); 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) */ if (!IsDiagonalTrack(track)) signal_density *= 2; if (CmdFailed(ValidateAutoDrag(&trackdir, tile, end_tile))) return CMD_ERROR; track = TrackdirToTrack(trackdir); /* trackdir might have changed, keep track in sync */ // copy the signal-style of the first rail-piece if existing if (HasSignals(tile)) { signals = _m[tile].m3 & SignalOnTrack(track); if (signals == 0) signals = SignalOnTrack(track); /* Can this actually occur? */ // copy signal/semaphores style (independent of CTRL) semaphores = (GetSignalVariant(tile) == SIG_ELECTRIC ? 0 : 8); } else { // no signals exist, drag a two-way signal stretch signals = SignalOnTrack(track); } /* 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 * mode - 1 remove signals, 0 build signals */ signal_ctr = total_cost = 0; for (;;) { // only build/remove signals with the specified density if (signal_ctr % signal_density == 0) { ret = DoCommand(tile, TrackdirToTrack(trackdir) | semaphores, signals, flags, (mode == 1) ? CMD_REMOVE_SIGNALS : CMD_BUILD_SIGNALS); /* Be user-friendly and try placing signals as much as possible */ if (!CmdFailed(ret)) { error = false; total_cost += ret; } } if (tile == end_tile) break; tile += ToTileIndexDiff(_trackdelta[trackdir]); signal_ctr++; // toggle railbit for the non-diagonal tracks (|, -- tracks) if (!IsDiagonalTrackdir(trackdir)) trackdir ^= 1; } return error ? CMD_ERROR : total_cost; } /** Build signals on a stretch of track. * Stub for the unified signal builder/remover * @see CmdSignalTrackHelper */ int32 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 p1 track to remove signal from (Track enum) */ int32 CmdRemoveSingleSignal(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { Track track = (Track)(p1 & 0x7); if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicle(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) { _m[tile].m3 &= ~SignalOnTrack(track); /* removed last signal from tile? */ if (GB(_m[tile].m3, 4, 4) == 0) { SB(_m[tile].m2, 4, 4, 0); SB(_m[tile].m5, 6, 2, RAIL_TILE_NORMAL >> 6); // XXX >> because the constant is meant for direct application, not use with SB SetSignalVariant(tile, SIG_ELECTRIC); // remove any possible semaphores } SetSignalsOnBothDir(tile, track); YapfNotifyTrackLayoutChange(tile, track); MarkTileDirtyByTile(tile); } return _price.remove_signals; } /** Remove signals on a stretch of track. * Stub for the unified signal builder/remover * @see CmdSignalTrackHelper */ int32 CmdRemoveSignalTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { return CmdSignalTrackHelper(tile, flags, p1, SETBIT(p2, 0)); } typedef int32 DoConvertRailProc(TileIndex tile, RailType totype, bool exec); static int32 DoConvertRail(TileIndex tile, RailType totype, bool exec) { if (!CheckTileOwnership(tile)) return CMD_ERROR; if (!EnsureNoVehicle(tile) && (!IsCompatibleRail(GetRailType(tile), totype) || IsPlainRailTile(tile))) return CMD_ERROR; // tile is already of requested type? if (GetRailType(tile) == totype) 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) { TrackBits tracks; SetRailType(tile, totype); MarkTileDirtyByTile(tile); // notify YAPF about the track layout change for (tracks = GetTrackBits(tile); tracks != TRACK_BIT_NONE; tracks = KILL_FIRST_BIT(tracks)) YapfNotifyTrackLayoutChange(tile, FIND_FIRST_BIT(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 _price.build_rail / 2; } extern int32 DoConvertStationRail(TileIndex tile, RailType totype, bool exec); extern int32 DoConvertStreetRail(TileIndex tile, RailType totype, bool exec); extern int32 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 p1 start tile of drag * @param p2 new railtype to convert to */ int32 CmdConvertRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) { int32 ret, cost, 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) intswap(ex, sx); if (ey < sy) intswap(ey, sy); money = GetAvailableMoneyForCommand(); cost = 0; ret = 0; 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_STREET: proc = DoConvertStreetRail; break; case MP_TUNNELBRIDGE: proc = DoConvertTunnelBridgeRail; break; default: continue; } ret = proc(tile, p2, false); if (CmdFailed(ret)) continue; cost += ret; if (flags & DC_EXEC) { money -= ret; if (money < 0) { _additional_cash_required = ret; return cost - ret; } proc(tile, p2, true); } } } return (cost == 0) ? ret : cost; } static int32 RemoveTrainDepot(TileIndex tile, uint32 flags) { if (!CheckTileOwnership(tile) && _current_player != OWNER_WATER) return CMD_ERROR; if (!EnsureNoVehicle(tile)) return CMD_ERROR; if (flags & DC_EXEC) { DiagDirection dir = GetRailDepotDirection(tile); DeleteDepot(GetDepotByTile(tile)); UpdateSignalsOnSegment(tile, dir); YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(dir))); } return _price.remove_train_depot; } static int32 ClearTile_Track(TileIndex tile, byte flags) { int32 cost; int32 ret; TrackBits tracks = GetTrackBits(tile); 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); } } cost = 0; switch (GetRailTileType(tile)) { case RAIL_TILE_SIGNALS: case RAIL_TILE_NORMAL: { uint i; for_each_bit (i, tracks) { ret = DoCommand(tile, 0, i, flags, CMD_REMOVE_SINGLE_RAIL); if (CmdFailed(ret)) return CMD_ERROR; cost += ret; } return cost; } case RAIL_TILE_DEPOT_WAYPOINT: if (GetRailTileSubtype(tile) == RAIL_SUBTYPE_DEPOT) { return RemoveTrainDepot(tile, flags); } else { return RemoveTrainWaypoint(tile, flags, false); } default: return CMD_ERROR; } } #include "table/track_land.h" static void DrawSingleSignal(TileIndex tile, byte condition, uint image, uint pos) { bool side = _opt.road_side & _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) == 0 && GetSignalVariant(tile) == SIG_ELECTRIC)) { sprite = SignalBase[side][GetSignalVariant(tile)][GetSignalType(tile)] + image + condition; } else { sprite = _signal_base + (GetSignalType(tile) - 1) * 16 + GetSignalVariant(tile) * 64 + image + condition; } AddSortableSpriteToDraw(sprite, x, y, 1, 1, 10, GetSlopeZ(x,y)); } static uint32 _drawtile_track_palette; static void DrawTrackFence_NW(const TileInfo *ti) { uint32 image = 0x515; if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x519 : 0x51B; AddSortableSpriteToDraw(image | _drawtile_track_palette, ti->x, ti->y + 1, 16, 1, 4, ti->z); } static void DrawTrackFence_SE(const TileInfo *ti) { uint32 image = 0x515; if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x519 : 0x51B; 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) { uint32 image = 0x516; if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x51A : 0x51C; AddSortableSpriteToDraw(image | _drawtile_track_palette, ti->x + 1, ti->y, 1, 16, 4, ti->z); } static void DrawTrackFence_SW(const TileInfo *ti) { uint32 image = 0x516; if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x51A : 0x51C; 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); } static void DrawTrackFence_NS_1(const TileInfo *ti) { int z = ti->z; if (ti->tileh & SLOPE_W) z += TILE_HEIGHT; AddSortableSpriteToDraw(0x517 | _drawtile_track_palette, ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z); } static void DrawTrackFence_NS_2(const TileInfo *ti) { int z = ti->z; if (ti->tileh & SLOPE_E) z += TILE_HEIGHT; AddSortableSpriteToDraw(0x517 | _drawtile_track_palette, ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z); } static void DrawTrackFence_WE_1(const TileInfo *ti) { int z = ti->z; if (ti->tileh & SLOPE_N) z += TILE_HEIGHT; AddSortableSpriteToDraw(0x518 | _drawtile_track_palette, ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z); } static void DrawTrackFence_WE_2(const TileInfo *ti) { int z = ti->z; if (ti->tileh & SLOPE_S) z += TILE_HEIGHT; AddSortableSpriteToDraw(0x518 | _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 * @param earth Draw as earth * @param snow Draw as snow * @param flat Always draw foundation */ static void DrawTrackBits(TileInfo* ti, TrackBits track) { const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile)); PalSpriteID image; 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) { uint foundation = GetRailFoundation(ti->tileh, track); if (foundation != 0) DrawFoundation(ti, foundation); // DrawFoundation() modifies ti. // 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: image |= PALETTE_TO_BARE_LAND; break; case RAIL_GROUND_ICE_DESERT: image += rti->snow_offset; break; default: break; } DrawGroundSprite(image); // Draw track pieces individually for junction tiles if (junction) { if (track & TRACK_BIT_X) DrawGroundSprite(rti->base_sprites.single_y); if (track & TRACK_BIT_Y) DrawGroundSprite(rti->base_sprites.single_x); if (track & TRACK_BIT_UPPER) DrawGroundSprite(rti->base_sprites.single_n); if (track & TRACK_BIT_LOWER) DrawGroundSprite(rti->base_sprites.single_s); if (track & TRACK_BIT_LEFT) DrawGroundSprite(rti->base_sprites.single_w); if (track & TRACK_BIT_RIGHT) DrawGroundSprite(rti->base_sprites.single_e); } if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti); } static void DrawSignals(TileIndex tile, TrackBits rails) { #define MAYBE_DRAW_SIGNAL(x,y,z) if (IsSignalPresent(tile, x)) DrawSingleSignal(tile, 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); MAYBE_DRAW_SIGNAL(3, 0x507, 1); } if (rails & TRACK_BIT_RIGHT) { MAYBE_DRAW_SIGNAL(0, 0x509, 2); MAYBE_DRAW_SIGNAL(1, 0x507, 3); } if (rails & TRACK_BIT_UPPER) { MAYBE_DRAW_SIGNAL(3, 0x505, 4); MAYBE_DRAW_SIGNAL(2, 0x503, 5); } if (rails & TRACK_BIT_LOWER) { MAYBE_DRAW_SIGNAL(1, 0x505, 6); MAYBE_DRAW_SIGNAL(0, 0x503, 7); } } else { MAYBE_DRAW_SIGNAL(3, 0x4FB, 8); MAYBE_DRAW_SIGNAL(2, 0x4FD, 9); } } else { MAYBE_DRAW_SIGNAL(3, 0x4FF, 10); MAYBE_DRAW_SIGNAL(2, 0x501, 11); } } static void DrawTile_Track(TileInfo *ti) { const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile)); PalSpriteID image; _drawtile_track_palette = SPRITE_PALETTE(PLAYER_SPRITE_COLOR(GetTileOwner(ti->tile))); if (IsPlainRailTile(ti->tile)) { TrackBits rails = GetTrackBits(ti->tile); DrawTrackBits(ti, rails); if (_display_opt & DO_FULL_DETAIL) DrawTrackDetails(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, ti->tileh); if (GetRailTileSubtype(ti->tile) == RAIL_SUBTYPE_DEPOT) { 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_DESERT) { 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(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, 31)) { CLRBIT(image, 31); 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); if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti); foreach_draw_tile_seq(dtss, dts->seq) { uint32 image = dtss->image + relocation; if (_display_opt & DO_TRANS_BUILDINGS) { MAKE_TRANSPARENT(image); } else if (image & PALETTE_MODIFIER_COLOR) { image |= _drawtile_track_palette; } AddSortableSpriteToDraw( image, ti->x + dtss->delta_x, ti->y + dtss->delta_y, dtss->size_x, dtss->size_y, dtss->size_z, ti->z + dtss->delta_z ); } } DrawBridgeMiddle(ti); } static void DrawTileSequence(int x, int y, uint32 ground, const DrawTileSeqStruct* dtss, uint32 offset) { uint32 palette = PLAYER_SPRITE_COLOR(_local_player); DrawSprite(ground, x, y); for (; dtss->image != 0; dtss++) { Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z); uint32 image = dtss->image + offset; if (image & PALETTE_MODIFIER_COLOR) image |= palette; DrawSprite(image, x + pt.x, y + pt.y); } } void DrawTrainDepotSprite(int x, int y, int dir, RailType railtype) { const DrawTileSprites* dts = &_depot_gfx_table[dir]; uint32 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); } typedef 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. byte 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]; byte next_dir[NUM_SSD_STACK]; } SetSignalsData; static bool SetSignalsEnumProc(TileIndex tile, void* data, int track, uint length, byte* state) { SetSignalsData* ssd = data; if (!IsTileType(tile, MP_RAILWAY)) return false; // the tile has signals? if (HasSignalOnTrack(tile, TrackdirToTrack(track))) { if (HasSignalOnTrackdir(tile, ReverseTrackdir(track))) { // 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] = track; // and the controlling bit number ssd->cur++; } // remember if this block has a presignal. ssd->has_presignal |= IsPresignalEntry(tile); } if (HasSignalOnTrackdir(tile, track) && IsPresignalExit(tile)) { // this is an exit signal that points out from the segment ssd->presignal_exits++; if (GetSignalStateByTrackdir(tile, track) != 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 */ typedef struct SignalVehicleCheckStruct { TileIndex tile; uint track; } SignalVehicleCheckStruct; static void *SignalVehicleCheckProc(Vehicle *v, void *data) { const SignalVehicleCheckStruct* dest = 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 // NOTE: the hashes for tiles may overlap, so this could maybe be optimised a bit by not checking every tile? dest.track = 0x40; //Vehicle inside a tunnel or on a bridge for (; tile != end; tile += TileOffsByDiagDir(direction)) { if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL) return true; } // no vehicle found return false; } return VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL; } static void SetSignalsAfterProc(TrackPathFinder *tpf) { SetSignalsData *ssd = 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 const byte _dir_from_track[14] = { 0,1,0,1,2,1, 0,0, 2,3,3,2,3,0, }; 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]); uint16 m2 = _m[tile].m2; // presignals don't turn green if there is at least one presignal exit and none are free if (IsPresignalEntry(tile)) { int ex = ssd->presignal_exits, exfree = ssd->presignal_exits_free; // subtract for dual combo signals so they don't count themselves if (IsPresignalExit(tile) && 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 & m2) == 0) continue; } else { // turn green if ((bit & m2) != 0) continue; } /* Update signals on the other side of this exit-combo signal; it changed. */ if (IsPresignalExit(tile)) { if (ssd->cur_stack != NUM_SSD_STACK) { ssd->next_tile[ssd->cur_stack] = tile; ssd->next_dir[ssd->cur_stack] = _dir_from_track[ssd->bit[i]]; ssd->cur_stack++; } else { DEBUG(misc, 0, "NUM_SSD_STACK too small"); /// @todo WTF is this??? } } // it changed, so toggle it _m[tile].m2 = m2 ^ 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, 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)) { uint f = GetRailFoundation(tileh, GetTrackBits(tile)); if (f != 0) { if (IsSteepSlope(tileh)) { z += TILE_HEIGHT; } else if (f < 15) { return z + TILE_HEIGHT; // leveled foundation } tileh = _inclined_tileh[f - 15]; // inclined foundation } return z + GetPartialZ(x & 0xF, y & 0xF, tileh); } else { return z + TILE_HEIGHT; } } static Slope GetSlopeTileh_Track(TileIndex tile, Slope tileh) { if (tileh == SLOPE_FLAT) return SLOPE_FLAT; if (IsPlainRailTile(tile)) { uint f = GetRailFoundation(tileh, GetTrackBits(tile)); if (f == 0) return tileh; if (f < 15) return SLOPE_FLAT; // leveled foundation return _inclined_tileh[f - 15]; // inclined foundation } else { return SLOPE_FLAT; } } 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_HILLY: if (GetTileZ(tile) > _opt.snow_line) { new_ground = RAIL_GROUND_ICE_DESERT; goto set_ground; } break; case LT_DESERT: 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) { byte a; uint16 b; if (mode != TRANSPORT_RAIL) return 0; if (IsPlainRailTile(tile)) { TrackBits rails = GetTrackBits(tile); uint32 ret = rails * 0x101; if (HasSignals(tile)) { a = _m[tile].m3; b = _m[tile].m2; 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 & 0xC0) == 0) b |= 0xC0; if ((a & 0x30) == 0) b |= 0x30; if ((b & 0x80) == 0) ret |= 0x10070000; if ((b & 0x40) == 0) ret |= 0x07100000; if ((b & 0x20) == 0) ret |= 0x20080000; if ((b & 0x10) == 0) ret |= 0x08200000; } else { if (rails == TRACK_BIT_CROSS) ret |= 0x40; } return ret; } else { if (GetRailTileSubtype(tile) == RAIL_SUBTYPE_DEPOT) { return AxisToTrackBits(DiagDirToAxis(GetRailDepotDirection(tile))) * 0x101; } else { return GetRailWaypointBits(tile) * 0x101; } } } static void ClickTile_Track(TileIndex tile) { if (IsTileDepotType(tile, TRANSPORT_RAIL)) { ShowDepotWindow(tile, VEH_Train); } else if (IsRailWaypoint(tile)) { ShowRenameWaypointWindow(GetWaypointByTile(tile)); } } 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[] = { STR_RAILROAD_TRACK_WITH_NORMAL_SIGNALS, STR_RAILROAD_TRACK_WITH_PRESIGNALS, STR_RAILROAD_TRACK_WITH_EXITSIGNALS, STR_RAILROAD_TRACK_WITH_COMBOSIGNALS }; td->str = signal_type[GetSignalType(tile)]; break; } case RAIL_TILE_DEPOT_WAYPOINT: default: td->str = (GetRailTileSubtype(tile) == RAIL_SUBTYPE_DEPOT) ? STR_1023_RAILROAD_TRAIN_DEPOT : 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 byte _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 0; /* 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 8; } else if (_fractcoords_enter[dir] == fract_coord) { if (DiagDirToDir(ReverseDiagDir(dir)) == v->direction) { /* enter the depot */ v->u.rail.track = 0x80, 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 4; } } 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 ? 1 : 2); } } } return 0; } 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 */ GetSlopeTileh_Track, /* get_slope_tileh_proc */ };