/* $Id$ */ #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 "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 "rail.h" #include "railtypes.h" // include table for railtypes extern uint16 _custom_sprites_base; const byte _track_sloped_sprites[14] = { 14, 15, 22, 13, 0, 21, 17, 12, 23, 0, 18, 20, 19, 16 }; void ShowTrainDepotWindow(TileIndex tile); /* Format of rail map5 byte. * 00 abcdef => Normal rail * 01 abcdef => Rail with signals * 10 ?????? => Unused * 11 ????dd => Depot * * abcdef is a bitmask, which contains ones for all present tracks. Below the * value for each track is given. */ /* 4 * --------- * |\ /| * | \ 1/ | * | \ / | * | \ / | * 16| \ |32 * | / \2 | * | / \ | * | / \ | * |/ \| * --------- * 8 */ // Constants for lower part of Map2 byte. enum RailMap2Lower4 { RAIL_MAP2LO_GROUND_MASK = 0xF, RAIL_GROUND_BROWN = 0, RAIL_GROUND_GREEN = 1, RAIL_GROUND_FENCE_NW = 2, RAIL_GROUND_FENCE_SE = 3, RAIL_GROUND_FENCE_SENW = 4, RAIL_GROUND_FENCE_NE = 5, RAIL_GROUND_FENCE_SW = 6, RAIL_GROUND_FENCE_NESW = 7, RAIL_GROUND_FENCE_VERT1 = 8, RAIL_GROUND_FENCE_VERT2 = 9, RAIL_GROUND_FENCE_HORIZ1 = 10, RAIL_GROUND_FENCE_HORIZ2 = 11, RAIL_GROUND_ICE_DESERT = 12, }; /* 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) { RailTileType type = GetRailTileType(tile); TrackBits current; /* The current track layout */ TrackBits future; /* The track layout we want to build */ _error_message = STR_1001_IMPOSSIBLE_TRACK_COMBINATION; if (type != RAIL_TYPE_NORMAL && type != RAIL_TYPE_SIGNALS) return false; /* Cannot build anything on depots and checkpoints */ /* 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) || type == RAIL_TYPE_SIGNALS) { /* 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 byte _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 }, // allowed rail on coast tile { 0, TRACK_BIT_LEFT, TRACK_BIT_LOWER, TRACK_BIT_Y|TRACK_BIT_LEFT|TRACK_BIT_LOWER, TRACK_BIT_RIGHT, TRACK_BIT_ALL, TRACK_BIT_X|TRACK_BIT_RIGHT|TRACK_BIT_LOWER, TRACK_BIT_ALL, TRACK_BIT_UPPER, TRACK_BIT_X|TRACK_BIT_LEFT|TRACK_BIT_UPPER, TRACK_BIT_ALL, TRACK_BIT_ALL, TRACK_BIT_Y|TRACK_BIT_RIGHT|TRACK_BIT_UPPER, TRACK_BIT_ALL, TRACK_BIT_ALL }, }; uint GetRailFoundation(uint tileh, uint bits) { int i; if ((~_valid_tileh_slopes[0][tileh] & bits) == 0) return 0; if ((~_valid_tileh_slopes[1][tileh] & bits) == 0) return tileh; if (( (i = 0, tileh == 1) || (i += 2, tileh == 2) || (i += 2, tileh == 4) || (i += 2, tileh == 8) ) && ( bits == TRACK_BIT_X || (i++, bits == TRACK_BIT_Y) )) { return i + 15; } else { return 0; } } static uint32 CheckRailSlope(uint tileh, TrackBits rail_bits, TrackBits existing, TileIndex tile) { // never allow building on top of steep tiles if (!IsSteepTileh(tileh)) { rail_bits |= existing; // don't allow building on the lower side of a coast if (IsTileType(tile, MP_WATER) && ~_valid_tileh_slopes[2][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 == 1 || tileh == 2 || tileh == 4 || tileh == 8) )) { // 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 x,y coordinates on where to build * @param p1 railtype of being built piece (normal, mono, maglev) * @param p2 rail track to build */ int32 CmdBuildSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2) { TileIndex tile; uint tileh; uint m5; /* XXX: Used only as a cache, should probably be removed? */ Track track = (Track)p2; TrackBits trackbit; int32 cost = 0; int32 ret; if (!ValParamRailtype(p1) || !ValParamTrackOrientation(track)) return CMD_ERROR; tile = TileVirtXY(x, y); tileh = GetTileSlope(tile, NULL); m5 = _m[tile].m5; trackbit = TrackToTrackBits(track); SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); switch (GetTileType(tile)) { case MP_TUNNELBRIDGE: if (!IsBridge(tile) || !IsBridgeMiddle(tile) || (GetBridgeAxis(tile) == AXIS_X ? TRACK_BIT_Y : TRACK_BIT_X) != trackbit) { // Get detailed error message return DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); } if (IsClearUnderBridge(tile)) { ret = CheckRailSlope(tileh, trackbit, 0, tile); if (CmdFailed(ret)) return ret; cost += ret; if (flags & DC_EXEC) SetRailUnderBridge(tile, _current_player, p1); } else if (IsTransportUnderBridge(tile) && GetTransportTypeUnderBridge(tile) == TRANSPORT_RAIL) { return_cmd_error(STR_1007_ALREADY_BUILT); } else { // Get detailed error message return DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); } break; case MP_RAILWAY: if (!CheckTrackCombination(tile, trackbit, flags) || !EnsureNoVehicle(tile)) { return CMD_ERROR; } if (GetRailTileType(tile) == RAIL_TYPE_DEPOT_WAYPOINT || !IsTileOwner(tile, _current_player) || GetRailType(tile) != p1) { // Get detailed error message return DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); } ret = CheckRailSlope(tileh, trackbit, GetTrackBits(tile), tile); if (CmdFailed(ret)) return ret; cost += ret; if (flags & DC_EXEC) { _m[tile].m2 &= ~RAIL_MAP2LO_GROUND_MASK; // Bare land _m[tile].m5 = m5 | trackbit; } break; case MP_STREET: #define M(x) (1 << (x)) /* Level crossings may only be built on these slopes */ if (!HASBIT(M(14) | M(13) | M(11) | M(10) | M(7) | M(5) | M(0), tileh)) { return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); } #undef M if (!EnsureNoVehicle(tile)) return CMD_ERROR; if (GetRoadType(tile) == ROAD_NORMAL && ( (track == TRACK_X && m5 == ROAD_Y) || (track == TRACK_Y && m5 == ROAD_X) // correct direction? )) { if (flags & DC_EXEC) { MakeRoadCrossing(tile, GetTileOwner(tile), _current_player, (track == TRACK_X ? AXIS_Y : AXIS_X), p1, _m[tile].m2); } break; } if (IsLevelCrossing(tile) && (m5 & 0x08 ? TRACK_X : TRACK_Y) == track) return_cmd_error(STR_1007_ALREADY_BUILT); /* FALLTHROUGH */ default: ret = CheckRailSlope(tileh, trackbit, 0, tile); if (CmdFailed(ret)) return ret; cost += ret; ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return ret; cost += ret; if (flags & DC_EXEC) MakeRailNormal(tile, _current_player, trackbit, p1); break; } if (flags & DC_EXEC) { MarkTileDirtyByTile(tile); SetSignalsOnBothDir(tile, track); } return cost + _price.build_rail; } /** Remove a single piece of track * @param x,y coordinates for removal of track * @param p1 unused * @param p2 rail orientation */ int32 CmdRemoveSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2) { Track track = (Track)p2; TrackBits trackbit; TileIndex tile; int32 cost = _price.remove_rail; if (!ValParamTrackOrientation(p2)) return CMD_ERROR; trackbit = TrackToTrackBits(track); SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); tile = TileVirtXY(x, y); if (!IsTileType(tile, MP_TUNNELBRIDGE) && !IsTileType(tile, MP_STREET) && !IsTileType(tile, MP_RAILWAY)) return CMD_ERROR; if (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) return CMD_ERROR; // allow building rail under bridge if (!IsTileType(tile, MP_TUNNELBRIDGE) && !EnsureNoVehicle(tile)) return CMD_ERROR; switch (GetTileType(tile)) { case MP_TUNNELBRIDGE: if (!IsBridge(tile) || !IsBridgeMiddle(tile) || !IsTransportUnderBridge(tile) || GetTransportTypeUnderBridge(tile) != TRANSPORT_RAIL || GetRailBitsUnderBridge(tile) != trackbit || !EnsureNoVehicleZ(tile, TilePixelHeight(tile))) { return CMD_ERROR; } if (!(flags & DC_EXEC)) return _price.remove_rail; SetClearUnderBridge(tile); break; case MP_STREET: { if (!IsLevelCrossing(tile)) return CMD_ERROR; /* This is a crossing, let's check if the direction is correct */ if (GetCrossingRailBits(tile) != trackbit) return CMD_ERROR; if (!(flags & DC_EXEC)) return _price.remove_rail; MakeRoadNormal(tile, _m[tile].m3, GetCrossingRoadBits(tile), _m[tile].m2); break; } case MP_RAILWAY: if (!IsPlainRailTile(tile)) return CMD_ERROR; /* See if the track to remove is actually there */ if (!(GetTrackBits(tile) & trackbit)) return CMD_ERROR; /* Charge extra to remove signals on the track, if they are there */ if (HasSignalOnTrack(tile, track)) cost += DoCommand(x, y, track, 0, flags, CMD_REMOVE_SIGNALS); if (!(flags & DC_EXEC)) return cost; /* We remove the trackbit here. */ _m[tile].m5 &= ~trackbit; if (GetTrackBits(tile) == 0) { /* The tile has no tracks left, it is no longer a rail tile */ DoClearSquare(tile); /* XXX: This is an optimisation, right? Is it really worth the ugly goto? */ goto skip_mark_dirty; } break; default: assert(0); } /* mark_dirty */ MarkTileDirtyByTile(tile); skip_mark_dirty:; SetSignalsOnBothDir(tile, track); return cost; } static const struct { int8 xinc[16]; int8 yinc[16]; } _railbit = {{ // 0 1 2 3 4 5 -16, 0,-16, 0, 16, 0, 0, 0, 16, 0, 0, 16, 0,-16, 0, 0, },{ 0, 16, 0, 16, 0, 16, 0, 0, 0,-16,-16, 0,-16, 0, 0, 0, }}; static int32 ValidateAutoDrag(Trackdir *trackdir, int x, int y, int ex, int ey) { 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 = _railbit.xinc[*trackdir]; trdy = _railbit.yinc[*trackdir]; if (!IsDiagonalTrackdir(*trackdir)) { trdx += _railbit.xinc[*trackdir ^ 1]; trdy += _railbit.yinc[*trackdir ^ 1]; } // 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 = _railbit.xinc[*trackdir]; trdy = _railbit.yinc[*trackdir]; 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 x,y 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(int x, int y, uint32 flags, uint32 p1, uint32 p2) { int ex, ey; 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); if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR; if (p1 >= MapSize()) return CMD_ERROR; trackdir = TrackToTrackdir(track); /* unpack end point */ ex = TileX(p1) * TILE_SIZE; ey = TileY(p1) * TILE_SIZE; SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); if (CmdFailed(ValidateAutoDrag(&trackdir, x, y, ex, ey))) return CMD_ERROR; if (flags & DC_EXEC) SndPlayTileFx(SND_20_SPLAT_2, TileVirtXY(x, y)); for (;;) { ret = DoCommand(x, y, 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; } else total_cost += ret; if (x == ex && y == ey) break; x += _railbit.xinc[trackdir]; y += _railbit.yinc[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(int x, int y, uint32 flags, uint32 p1, uint32 p2) { return CmdRailTrackHelper(x, y, flags, p1, CLRBIT(p2, 7)); } /** Build rail on a stretch of track. * Stub for the unified rail builder/remover * @see CmdRailTrackHelper */ int32 CmdRemoveRailroadTrack(int x, int y, uint32 flags, uint32 p1, uint32 p2) { return CmdRailTrackHelper(x, y, flags, p1, SETBIT(p2, 7)); } /** Build a train depot * @param x,y position of the train depot * @param p1 rail type * @param p2 depot direction (0 through 3), where 0 is NE, 1 is SE, 2 is SW, 3 is NW * * @todo When checking for the tile slope, * distingush between "Flat land required" and "land sloped in wrong direction" */ int32 CmdBuildTrainDepot(int x, int y, uint32 flags, uint32 p1, uint32 p2) { Depot *d; TileIndex tile = TileVirtXY(x, y); int32 cost, ret; uint 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 != 0 && ( _is_old_ai_player || !_patches.build_on_slopes || IsSteepTileh(tileh) || !CanBuildDepotByTileh(p2, tileh) )) { return_cmd_error(STR_0007_FLAT_LAND_REQUIRED); } ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return CMD_ERROR; cost = ret; d = AllocateDepot(); if (d == NULL) return CMD_ERROR; if (flags & DC_EXEC) { if (IsLocalPlayer()) _last_built_train_depot_tile = tile; MakeRailDepot(tile, _current_player, p2, p1); MarkTileDirtyByTile(tile); d->xy = tile; d->town_index = ClosestTownFromTile(tile, (uint)-1)->index; UpdateSignalsOnSegment(tile, p2); } return cost + _price.build_train_depot; } /** Build signals, alternate between double/single, signal/semaphore, * pre/exit/combo-signals, and what-else not * @param x,y coordinates where signals is being built * @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(int x, int y, uint32 flags, uint32 p1, uint32 p2) { TileIndex tile = TileVirtXY(x, y); 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 (GetRailTileType(tile) != RAIL_TYPE_SIGNALS) { // there are no signals at all on this tile yet _m[tile].m5 |= RAIL_TYPE_SIGNALS; // change into signals _m[tile].m2 |= 0xF0; // all signals are on _m[tile].m3 &= ~0xF0; // no signals built by default _m[tile].m4 = 0; 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 { // cycle between two-way -> one-way -> one-way -> ... /* TODO: Rewrite switch into something more general */ switch (track) { case TRACK_LOWER: case TRACK_RIGHT: { byte signal = (_m[tile].m3 - 0x10) & 0x30; if (signal == 0) signal = 0x30; _m[tile].m3 &= ~0x30; _m[tile].m3 |= signal; break; } default: { byte signal = (_m[tile].m3 - 0x40) & 0xC0; if (signal == 0) signal = 0xC0; _m[tile].m3 &= ~0xC0; _m[tile].m3 |= signal; break; } } } } } 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); } return cost; } /** Build many signals by dragging; AutoSignals * @param x,y 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(int x, int y, uint32 flags, uint32 p1, uint32 p2) { int ex, ey; int32 ret, total_cost, signal_ctr; byte signals; TileIndex tile = TileVirtXY(x, y); bool error = true; 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; 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; // unpack end tile ex = TileX(p1) * TILE_SIZE; ey = TileY(p1) * TILE_SIZE; if (CmdFailed(ValidateAutoDrag(&trackdir, x, y, ex, ey))) 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 (GetRailTileType(tile) == RAIL_TYPE_SIGNALS && GetTrackBits(tile) != 0) { /* XXX: GetTrackBits check useless? */ 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(x, y, TrackdirToTrack(trackdir) | semaphores, signals, flags, (mode == 1) ? CMD_REMOVE_SIGNALS : CMD_BUILD_SIGNALS); /* Abort placement for any other error than NOT_SUITABLE_TRACK * This includes vehicles on track, competitor's tracks, etc. */ if (CmdFailed(ret)) { if (_error_message != STR_1005_NO_SUITABLE_RAILROAD_TRACK && mode != 1) return CMD_ERROR; } else { error = false; total_cost += ret; } } if (ex == x && ey == y) break; // reached end of drag x += _railbit.xinc[trackdir]; y += _railbit.yinc[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(int x, int y, uint32 flags, uint32 p1, uint32 p2) { return CmdSignalTrackHelper(x, y, flags, p1, p2); } /** Remove signals * @param x,y coordinates where signal is being deleted from * @param p1 track to remove signal from (Track enum) */ int32 CmdRemoveSingleSignal(int x, int y, uint32 flags, uint32 p1, uint32 p2) { TileIndex tile = TileVirtXY(x, y); Track track = (Track)(p1 & 0x7); if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicle(tile)) return CMD_ERROR; if (!HasSignalOnTrack(tile, track)) // no signals on 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_TYPE_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); MarkTileDirtyByTile(tile); } return _price.remove_signals; } /** Remove signals on a stretch of track. * Stub for the unified signal builder/remover * @see CmdSignalTrackHelper */ int32 CmdRemoveSignalTrack(int x, int y, uint32 flags, uint32 p1, uint32 p2) { return CmdSignalTrackHelper(x, y, flags, p1, SETBIT(p2, 0)); } typedef int32 DoConvertRailProc(TileIndex tile, uint totype, bool exec); static int32 DoConvertRail(TileIndex tile, uint totype, bool exec) { if (!CheckTileOwnership(tile) || !EnsureNoVehicle(tile)) return CMD_ERROR; // tile is already of requested type? if (GetRailType(tile) == totype) return CMD_ERROR; // change type. if (exec) { SetRailType(tile, totype); MarkTileDirtyByTile(tile); } return _price.build_rail / 2; } extern int32 DoConvertStationRail(TileIndex tile, uint totype, bool exec); extern int32 DoConvertStreetRail(TileIndex tile, uint totype, bool exec); extern int32 DoConvertTunnelBridgeRail(TileIndex tile, uint totype, bool exec); /** Convert one rail type to the other. You can convert normal rail to * monorail/maglev easily or vice-versa. * @param ex,ey end tile of rail conversion drag * @param p1 start tile of drag * @param p2 new railtype to convert to */ int32 CmdConvertRail(int ex, int ey, uint32 flags, uint32 p1, uint32 p2) { int32 ret, cost, money; 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 sx = TileX(p1) * TILE_SIZE; sy = TileY(p1) * TILE_SIZE; if (ex < sx) intswap(ex, sx); if (ey < sy) intswap(ey, sy); money = GetAvailableMoneyForCommand(); cost = 0; for (x = sx; x <= ex; x += TILE_SIZE) { for (y = sy; y <= ey; y += TILE_SIZE) { TileIndex tile = TileVirtXY(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) ? CMD_ERROR : 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); DoDeleteDepot(tile); UpdateSignalsOnSegment(tile, dir); } return _price.remove_train_depot; } static int32 ClearTile_Track(TileIndex tile, byte flags) { int32 cost; int32 ret; byte m5; m5 = _m[tile].m5; if (flags & DC_AUTO) { if (GetRailTileType(tile) == RAIL_TYPE_DEPOT_WAYPOINT) { return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED); } if (!IsTileOwner(tile, _current_player)) return_cmd_error(STR_1024_AREA_IS_OWNED_BY_ANOTHER); return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK); } cost = 0; switch (GetRailTileType(tile)) { /* XXX: Why the fuck do we remove these thow signals first? */ case RAIL_TYPE_SIGNALS: if (HasSignalOnTrack(tile, TRACK_X)) { ret = DoCommandByTile(tile, TRACK_X, 0, flags, CMD_REMOVE_SIGNALS); if (CmdFailed(ret)) return CMD_ERROR; cost += ret; } if (HasSignalOnTrack(tile, TRACK_LOWER)) { ret = DoCommandByTile(tile, TRACK_LOWER, 0, flags, CMD_REMOVE_SIGNALS); if (CmdFailed(ret)) return CMD_ERROR; cost += ret; } m5 &= TRACK_BIT_MASK; if (!(flags & DC_EXEC)) { for (; m5 != 0; m5 >>= 1) if (m5 & 1) cost += _price.remove_rail; return cost; } /* FALLTHROUGH */ case RAIL_TYPE_NORMAL: { uint i; for (i = 0; m5 != 0; i++, m5 >>= 1) { if (m5 & 1) { ret = DoCommandByTile(tile, 0, i, flags, CMD_REMOVE_SINGLE_RAIL); if (CmdFailed(ret)) return CMD_ERROR; cost += ret; } } return cost; } case RAIL_TYPE_DEPOT_WAYPOINT: switch (m5 & RAIL_SUBTYPE_MASK) { case RAIL_SUBTYPE_DEPOT: return RemoveTrainDepot(tile, flags); case RAIL_SUBTYPE_WAYPOINT: return RemoveTrainWaypoint(tile, flags, false); default: return CMD_ERROR; } default: return CMD_ERROR; } } #include "table/track_land.h" // used for presignals static const SpriteID _signal_base_sprites[16] = { 0x4FB, 0x1323, 0x1333, 0x1343, // semaphores 0x1353, 0x1363, 0x1373, 0x1383, // mirrored versions 0x4FB, 0x1323, 0x1333, 0x1343, // semaphores 0x1446, 0x1456, 0x1466, 0x1476, }; // used to determine the side of the road for the signal static const byte _signal_position[24] = { /* original: left side position */ 0x58, 0x1E, 0xE1, 0xB9, 0x01, 0xA3, 0x4B, 0xEE, 0x3B, 0xD4, 0x43, 0xBD, /* patch: ride side position */ 0x1E, 0xAC, 0x64, 0xE1, 0x4A, 0x10, 0xEE, 0xC5, 0xDB, 0x34, 0x4D, 0xB3 }; static void DrawSignalHelper(const TileInfo *ti, byte condition, uint32 image_and_pos) { bool otherside = _opt.road_side & _patches.signal_side; uint v = _signal_position[(image_and_pos & 0xF) + (otherside ? 12 : 0)]; uint x = ti->x | (v&0xF); uint y = ti->y | (v>>4); uint sprite = _signal_base_sprites[(_m[ti->tile].m4 & 0x7) + (otherside ? 8 : 0)] + (image_and_pos>>4) + ((condition != 0) ? 1 : 0); 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 != 0) image = (ti->tileh & 2) ? 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 != 0) image = (ti->tileh & 2) ? 0x519 : 0x51B; AddSortableSpriteToDraw(image | _drawtile_track_palette, ti->x, ti->y + 15, 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 != 0) image = (ti->tileh & 2) ? 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 != 0) image = (ti->tileh & 2) ? 0x51A : 0x51C; AddSortableSpriteToDraw(image | _drawtile_track_palette, ti->x + 15, 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 & 1) z += 8; AddSortableSpriteToDraw(0x517 | _drawtile_track_palette, ti->x + 8, ti->y + 8, 1, 1, 4, z); } static void DrawTrackFence_NS_2(const TileInfo *ti) { int z = ti->z; if (ti->tileh & 4) z += 8; AddSortableSpriteToDraw(0x517 | _drawtile_track_palette, ti->x + 8, ti->y + 8, 1, 1, 4, z); } static void DrawTrackFence_WE_1(const TileInfo *ti) { int z = ti->z; if (ti->tileh & 8) z += 8; AddSortableSpriteToDraw(0x518 | _drawtile_track_palette, ti->x + 8, ti->y + 8, 1, 1, 4, z); } static void DrawTrackFence_WE_2(const TileInfo *ti) { int z = ti->z; if (ti->tileh & 2) z += 8; AddSortableSpriteToDraw(0x518 | _drawtile_track_palette, ti->x + 8, ti->y + 8, 1, 1, 4, z); } static void DetTrackDrawProc_Null(const TileInfo *ti) { /* nothing should be here */ } typedef void DetailedTrackProc(const TileInfo *ti); static DetailedTrackProc* const _detailed_track_proc[] = { DetTrackDrawProc_Null, DetTrackDrawProc_Null, DrawTrackFence_NW, DrawTrackFence_SE, DrawTrackFence_NW_SE, DrawTrackFence_NE, DrawTrackFence_SW, DrawTrackFence_NE_SW, DrawTrackFence_NS_1, DrawTrackFence_NS_2, DrawTrackFence_WE_1, DrawTrackFence_WE_2, DetTrackDrawProc_Null, DetTrackDrawProc_Null, DetTrackDrawProc_Null, DetTrackDrawProc_Null, }; static void DrawSpecialBuilding( uint32 image, uint32 offset, const TileInfo* ti, byte x, byte y, byte z, byte xsize, byte ysize, byte zsize) { if (image & PALETTE_MODIFIER_COLOR) image |= _drawtile_track_palette; image += offset; if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image); AddSortableSpriteToDraw(image, ti->x + x, ti->y + y, xsize, ysize, zsize, ti->z + z); } /** * 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, bool earth, bool snow, bool flat) { 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 != 0) { int foundation; if (flat) { foundation = ti->tileh; } else { foundation = GetRailFoundation(ti->tileh, track); } if (foundation != 0) DrawFoundation(ti, foundation); // DrawFoundation() modifies ti. // Default sloped sprites.. if (ti->tileh != 0) image = _track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.track_y; } if (earth) { image = (image & SPRITE_MASK) | PALETTE_TO_BARE_LAND; // Use brown palette } else if (snow) { image += rti->snow_offset; } 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); } } static void DrawTile_Track(TileInfo *ti) { byte m5; const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile)); PalSpriteID image; _drawtile_track_palette = SPRITE_PALETTE(PLAYER_SPRITE_COLOR(GetTileOwner(ti->tile))); m5 = (byte)ti->map5; if (GetRailTileType(ti->tile) != RAIL_TYPE_DEPOT_WAYPOINT) { bool earth = (_m[ti->tile].m2 & RAIL_MAP2LO_GROUND_MASK) == RAIL_GROUND_BROWN; bool snow = (_m[ti->tile].m2 & RAIL_MAP2LO_GROUND_MASK) == RAIL_GROUND_ICE_DESERT; DrawTrackBits(ti, m5 & TRACK_BIT_MASK, earth, snow, false); if (_display_opt & DO_FULL_DETAIL) { _detailed_track_proc[_m[ti->tile].m2 & RAIL_MAP2LO_GROUND_MASK](ti); } /* draw signals also? */ if (GetRailTileType(ti->tile) != RAIL_TYPE_SIGNALS) return; { byte m23; m23 = (_m[ti->tile].m3 >> 4) | (_m[ti->tile].m2 & 0xF0); #define HAS_SIGNAL(x) (m23 & (byte)(0x1 << (x))) #define ISON_SIGNAL(x) (m23 & (byte)(0x10 << (x))) #define MAYBE_DRAW_SIGNAL(x,y,z) if (HAS_SIGNAL(x)) DrawSignalHelper(ti, ISON_SIGNAL(x), ((y-0x4FB) << 4)|(z)) if (!(m5 & TRACK_BIT_Y)) { if (!(m5 & TRACK_BIT_X)) { if (m5 & TRACK_BIT_LEFT) { MAYBE_DRAW_SIGNAL(2, 0x509, 0); MAYBE_DRAW_SIGNAL(3, 0x507, 1); } if (m5 & TRACK_BIT_RIGHT) { MAYBE_DRAW_SIGNAL(0, 0x509, 2); MAYBE_DRAW_SIGNAL(1, 0x507, 3); } if (m5 & TRACK_BIT_UPPER) { MAYBE_DRAW_SIGNAL(3, 0x505, 4); MAYBE_DRAW_SIGNAL(2, 0x503, 5); } if (m5 & 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); } } } else { /* draw depots / waypoints */ const DrawTrackSeqStruct *drss; byte type = m5 & 0x3F; // 0-3: depots, 4-5: waypoints if (ti->tileh != 0) DrawFoundation(ti, ti->tileh); if (IsRailWaypoint(ti->tile) && HASBIT(_m[ti->tile].m3, 4)) { // look for customization byte stat_id = GetWaypointByTile(ti->tile)->stat_id; const StationSpec *stat = GetCustomStation(STAT_CLASS_WAYP, stat_id); if (stat != NULL) { DrawTileSeqStruct const *seq; // emulate station tile - open with building const DrawTileSprites *cust = &stat->renderdata[2 + (m5 & 0x1)]; uint32 relocation = GetCustomStationRelocation(stat, ComposeWaypointStation(ti->tile), 0); /* We don't touch the 0x8000 bit. In all this * waypoint code, it is used to indicate that * we should offset by railtype, but we always * do that for custom ground sprites and never * for station sprites. And in the drawing * code, it is used to indicate that the sprite * should be drawn in company colors, and it's * up to the GRF file to decide that. */ image = cust->ground_sprite; image += (image < _custom_sprites_base) ? rti->total_offset : GetRailType(ti->tile); DrawGroundSprite(image); foreach_draw_tile_seq(seq, cust->seq) { DrawSpecialBuilding( seq->image + relocation, 0, ti, seq->delta_x, seq->delta_y, seq->delta_z, seq->width, seq->height, seq->unk ); } return; } } drss = _track_depot_layout_table[type]; image = drss++->image; /* @note This is kind of an ugly hack, as the PALETTE_MODIFIER_COLOR indicates * whether the sprite is railtype dependent. Rewrite this asap */ if (image & PALETTE_MODIFIER_COLOR) image = (image & SPRITE_MASK) + rti->total_offset; // adjust ground tile for desert // (don't adjust for arctic depots, because snow in depots looks weird) // type >= 4 means waypoints if ((_m[ti->tile].m4 & RAIL_MAP2LO_GROUND_MASK) == RAIL_GROUND_ICE_DESERT && (_opt.landscape == LT_DESERT || type >= 4)) { if (image != SPR_FLAT_GRASS_TILE) { image += rti->snow_offset; // tile with tracks } else { image = SPR_FLAT_SNOWY_TILE; // flat ground } } DrawGroundSprite(image); for (; drss->image != 0; drss++) { DrawSpecialBuilding( drss->image, type < 4 ? rti->total_offset : 0, ti, drss->subcoord_x, drss->subcoord_y, 0, drss->width, drss->height, 0x17 ); } } } void DrawTrainDepotSprite(int x, int y, int image, RailType railtype) { uint32 ormod, img; const RailtypeInfo *rti = GetRailTypeInfo(railtype); const DrawTrackSeqStruct *dtss; ormod = PLAYER_SPRITE_COLOR(_local_player); dtss = _track_depot_layout_table[image]; x += 33; y += 17; img = dtss++->image; /* @note This is kind of an ugly hack, as the PALETTE_MODIFIER_COLOR indicates * whether the sprite is railtype dependent. Rewrite this asap */ if (img & PALETTE_MODIFIER_COLOR) img = (img & SPRITE_MASK) + rti->total_offset; DrawSprite(img, x, y); for (; dtss->image != 0; dtss++) { Point pt = RemapCoords(dtss->subcoord_x, dtss->subcoord_y, 0); image = dtss->image; if (image & PALETTE_MODIFIER_COLOR) image |= ormod; DrawSprite(image + rti->total_offset, x + pt.x, y + pt.y); } } void DrawDefaultWaypointSprite(int x, int y, RailType railtype) { const DrawTrackSeqStruct *dtss = _track_depot_layout_table[4]; const RailtypeInfo *rti = GetRailTypeInfo(railtype); uint32 img; img = dtss++->image; if (img & PALETTE_MODIFIER_COLOR) img = (img & SPRITE_MASK) + rti->total_offset; DrawSprite(img, x, y); for (; dtss->image != 0; dtss++) { Point pt = RemapCoords(dtss->subcoord_x, dtss->subcoord_y, 0); img = dtss->image; if (img & PALETTE_MODIFIER_COLOR) img |= PLAYER_SPRITE_COLOR(_local_player); DrawSprite(img, x + pt.x, y + pt.y); } } 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, SetSignalsData *ssd, int track, uint length, byte *state) { 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 |= (_m[tile].m4&1); } if (HasSignalOnTrackdir(tile, track) && _m[tile].m4 & 2) { // this is an exit signal that points out from the segment ssd->presignal_exits++; if (GetSignalState(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; TileIndex tile; if (v->type != VEH_Train) return NULL; /* Find the tile outside the tunnel, for signalling */ if (v->u.rail.track == 0x40) { tile = GetVehicleOutOfTunnelTile(v); } else { tile = v->tile; } /* Wrong tile, or no train? Not a match */ if (tile != dest->tile) return NULL; /* Are we on the same piece of track? */ if (dest->track & (v->u.rail.track + (v->u.rail.track << 8))) 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; /** @todo "Hackish" fix for the tunnel problems. This is needed because a tunnel * is some kind of invisible black hole, and there is some special magic going * on in there. This 'workaround' can be removed once the maprewrite is done. */ if (IsTunnelTile(tile)) { // It is a tunnel we're checking, we need to do some special stuff // because VehicleFromPos will not find the vihicle otherwise TileIndex end = GetOtherTunnelEnd(tile); DiagDirection direction = GetTunnelDirection(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 "hidden" vehicle // NOTE: the hashes for tiles may overlap, so this could maybe be optimised a bit by not checking every tile? dest.track = 0x40; // trackbit for vehicles "hidden" inside a tunnel for (; tile != end; tile += TileOffsByDir(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 (_m[tile].m4 & 1) { int ex = ssd->presignal_exits, exfree = ssd->presignal_exits_free; // subtract for dual combo signals so they don't count themselves if (_m[tile].m4 & 2 && HasSignalOnTrackdir(tile, ssd->bit[i])) { ex--; if (GetSignalState(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 (_m[tile].m4 & 2) { 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 { printf("NUM_SSD_STACK too small\n"); /// @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, (TPFEnumProc*)SetSignalsEnumProc, SetSignalsAfterProc, &ssd); ChangeSignalStates(&ssd); // remember the result only for the first iteration. if (result < 0) result = ssd.stop; // 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(const TileInfo* ti) { uint z = ti->z; int th = ti->tileh; // check if it's a foundation if (ti->tileh != 0) { if ((ti->map5 & 0x80) == 0) { uint f = GetRailFoundation(ti->tileh, ti->map5 & 0x3F); if (f != 0) { if (f < 15) { // leveled foundation return z + 8; } // inclined foundation th = _inclined_tileh[f - 15]; } } else if ((ti->map5 & RAIL_TILE_TYPE_MASK) == RAIL_TYPE_DEPOT_WAYPOINT) { // depot or waypoint return z + 8; } return GetPartialZ(ti->x & 0xF, ti->y & 0xF, th) + z; } return z; } static uint GetSlopeTileh_Track(const TileInfo *ti) { // check if it's a foundation if (ti->tileh != 0) { if ((ti->map5 & 0x80) == 0) { uint f = GetRailFoundation(ti->tileh, ti->map5 & 0x3F); if (f != 0) { if (f < 15) { // leveled foundation return 0; } // inclined foundation return _inclined_tileh[f - 15]; } } else if ((ti->map5 & 0xC0) == 0xC0) { // depot or waypoint return 0; } } return ti->tileh; } static void GetAcceptedCargo_Track(TileIndex tile, AcceptedCargo ac) { /* not used */ } static void AnimateTile_Track(TileIndex tile) { /* not used */ } static void TileLoop_Track(TileIndex tile) { byte old_ground; byte new_ground; if (GetRailType(tile) == RAIL_TYPE_DEPOT_WAYPOINT) { old_ground = GB(_m[tile].m4, 0, 4); } else { old_ground = GB(_m[tile].m2, 0, 4); } switch (_opt.landscape) { case LT_HILLY: if (GetTileZ(tile) > _opt.snow_line) { /* convert into snow? */ new_ground = RAIL_GROUND_ICE_DESERT; goto modify_me; } break; case LT_DESERT: if (GetMapExtraBits(tile) == 1) { /* convert into desert? */ new_ground = RAIL_GROUND_ICE_DESERT; goto modify_me; } break; } // Don't continue tile loop for depots if (GetRailType(tile) == RAIL_TYPE_DEPOT_WAYPOINT) return; new_ground = RAIL_GROUND_GREEN; if (old_ground != RAIL_GROUND_BROWN) { /* wait until bottom is green */ /* determine direction of fence */ TrackBits rail = _m[tile].m5 & TRACK_BIT_MASK; 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); if (!IsTileType(n, MP_RAILWAY) || !IsTileOwner(n, owner) || (_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_UPPER || (_m[n].m5 & TRACK_BIT_MASK) == 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); if (!IsTileType(n, MP_RAILWAY) || !IsTileOwner(n, owner) || (_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_LOWER || (_m[n].m5 & TRACK_BIT_MASK) == 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); if (!IsTileType(n, MP_RAILWAY) || !IsTileOwner(n, owner) || (_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_UPPER || (_m[n].m5 & TRACK_BIT_MASK) == 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); if (!IsTileType(n, MP_RAILWAY) || !IsTileOwner(n, owner) || (_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_LOWER || (_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_LEFT) { new_ground = (new_ground == RAIL_GROUND_FENCE_NE) ? RAIL_GROUND_FENCE_NESW : RAIL_GROUND_FENCE_SW; } } break; } } } modify_me:; /* tile changed? */ if (old_ground != new_ground) { if (GetRailTileType(tile) == RAIL_TYPE_DEPOT_WAYPOINT) { SB(_m[tile].m4, 0, 4, new_ground); } else { SB(_m[tile].m2, 0, 4, new_ground); } MarkTileDirtyByTile(tile); } } static uint32 GetTileTrackStatus_Track(TileIndex tile, TransportType mode) { byte m5, a; uint16 b; uint32 ret; if (mode != TRANSPORT_RAIL) return 0; m5 = _m[tile].m5; if (GetRailTileType(tile) != RAIL_TYPE_DEPOT_WAYPOINT) { ret = (m5 | (m5 << 8)) & 0x3F3F; if (GetRailTileType(tile) != RAIL_TYPE_SIGNALS) { if ( (ret & 0xFF) == 3) /* Diagonal crossing? */ ret |= 0x40; } else { /* has_signals */ 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 (m5 & 0x40) { static const byte _train_spec_tracks[6] = {1,2,1,2,1,2}; m5 = _train_spec_tracks[m5 & 0x3F]; ret = (m5 << 8) + m5; } else return 0; return ret; } static void ClickTile_Track(TileIndex tile) { if (IsTileDepotType(tile, TRANSPORT_RAIL)) { ShowTrainDepotWindow(tile); } else if (IsRailWaypoint(tile)) { ShowRenameWaypointWindow(GetWaypointByTile(tile)); } } static void GetTileDesc_Track(TileIndex tile, TileDesc *td) { td->owner = GetTileOwner(tile); switch (GetRailTileType(tile)) { case RAIL_TYPE_NORMAL: td->str = STR_1021_RAILROAD_TRACK; break; case RAIL_TYPE_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_TYPE_DEPOT_WAYPOINT: default: td->str = ((_m[tile].m5 & RAIL_SUBTYPE_MASK) == 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 != OWNER_SPECTATOR) { SetTileOwner(tile, new_player); } else { DoCommandByTile(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 const byte _depot_track_mask[4] = {1, 2, 1, 2}; 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) TrainEnterDepot(v, tile); v->tile = tile; InvalidateWindow(WC_VEHICLE_DEPOT, 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 = _depot_track_mask[dir]; assert(v->u.rail.track); } } } return 0; } void InitializeRail(void) { _last_built_train_depot_tile = 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 */ NULL, /* vehicle_leave_tile_proc */ GetSlopeTileh_Track, /* get_slope_tileh_proc */ };