#include "stdafx.h" #include "ttd.h" #include "table/sprites.h" #include "table/strings.h" #include "gfx.h" #include "map.h" #include "tile.h" #include "vehicle.h" #include "viewport.h" #include "command.h" #include "pathfind.h" #include "town.h" #include "sound.h" #include "station.h" #include "sprite.h" #include "depot.h" #include "waypoint.h" extern uint16 _custom_sprites_base; void ShowTrainDepotWindow(uint tile); enum { /* These values are bitmasks for the map5 byte */ RAIL_TYPE_NORMAL = 0, RAIL_TYPE_SIGNALS = 0x40, RAIL_TYPE_SPECIAL = 0x80, // If this bit is set, then it's not a regular track. RAIL_TYPE_DEPOT = 0xC0, RAIL_TYPE_MASK = 0xC0, RAIL_BIT_DIAG1 = 1, // 0 RAIL_BIT_DIAG2 = 2, // 1 RAIL_BIT_UPPER = 4, // 2 RAIL_BIT_LOWER = 8, // 3 RAIL_BIT_LEFT = 16, // 4 RAIL_BIT_RIGHT = 32, // 5 RAIL_BIT_MASK = 0x3F, RAIL_DEPOT_TRACK_MASK = 1, RAIL_DEPOT_DIR = 3, RAIL_SUBTYPE_MASK = 0x3C, RAIL_SUBTYPE_DEPOT = 0x00, RAIL_SUBTYPE_WAYPOINT = 0x04 }; static inline bool IsRailDepot(byte m5) { return (m5 & RAIL_TYPE_MASK) == RAIL_TYPE_DEPOT && (m5 & RAIL_SUBTYPE_MASK) == RAIL_SUBTYPE_DEPOT; } /* 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(uint map5, uint trackbits, uint flags) { _error_message = STR_1001_IMPOSSIBLE_TRACK_COMBINATION; switch (map5 & RAIL_TYPE_MASK) { case RAIL_TYPE_NORMAL: if (map5 & trackbits) { _error_message = STR_1007_ALREADY_BUILT; return false; } if (flags & DC_NO_RAIL_OVERLAP) { // Computer players are not allowed to intersect pieces of rail. map5 |= trackbits; return map5 == (RAIL_BIT_UPPER | RAIL_BIT_LOWER) || map5 == (RAIL_BIT_LEFT | RAIL_BIT_RIGHT); } else { return true; } case RAIL_TYPE_SIGNALS: if (map5 & trackbits) { _error_message = STR_1007_ALREADY_BUILT; return false; } map5 |= trackbits; return map5 == (RAIL_TYPE_SIGNALS | RAIL_BIT_UPPER | RAIL_BIT_LOWER) || map5 == (RAIL_TYPE_SIGNALS | RAIL_BIT_LEFT | RAIL_BIT_RIGHT); default: return false; } } static const byte _valid_tileh_slopes[4][15] = { // set of normal ones { RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_RIGHT, RAIL_BIT_UPPER, RAIL_BIT_DIAG1, RAIL_BIT_LEFT, 0, RAIL_BIT_DIAG2, RAIL_BIT_LOWER, RAIL_BIT_LOWER, RAIL_BIT_DIAG2, 0, RAIL_BIT_LEFT, RAIL_BIT_DIAG1, RAIL_BIT_UPPER, RAIL_BIT_RIGHT, }, // allowed rail for an evenly raised platform { 0, RAIL_BIT_LEFT, RAIL_BIT_LOWER, RAIL_BIT_DIAG2 | RAIL_BIT_LOWER | RAIL_BIT_LEFT, RAIL_BIT_RIGHT, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_DIAG1 | RAIL_BIT_LOWER | RAIL_BIT_RIGHT, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_UPPER, RAIL_BIT_DIAG1 | RAIL_BIT_UPPER | RAIL_BIT_LEFT, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_DIAG2 | RAIL_BIT_UPPER | RAIL_BIT_RIGHT, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, }, // allowed rail on coast tile { 0, RAIL_BIT_LEFT, RAIL_BIT_LOWER, RAIL_BIT_DIAG2|RAIL_BIT_LEFT|RAIL_BIT_LOWER, RAIL_BIT_RIGHT, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_DIAG1|RAIL_BIT_RIGHT|RAIL_BIT_LOWER, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_UPPER, RAIL_BIT_DIAG1|RAIL_BIT_LEFT|RAIL_BIT_UPPER, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_DIAG2|RAIL_BIT_RIGHT|RAIL_BIT_UPPER, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, }, // valid railway crossings on slopes { 1, 0, 0, // 0, 1, 2 0, 0, 1, // 3, 4, 5 0, 1, 0, // 6, 7, 8 0, 1, 1, // 9, 10, 11 0, 1, 1, // 12, 13, 14 } }; 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 == RAIL_BIT_DIAG1 || (i++, bits == RAIL_BIT_DIAG2))) return i + 15; return 0; } // static uint32 CheckRailSlope(uint tileh, uint rail_bits, uint existing, TileIndex tile) { // never allow building on top of steep tiles if (!(tileh & 0x10)) { 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 == RAIL_BIT_DIAG1 || rail_bits == RAIL_BIT_DIAG2) && (tileh == 1 || tileh == 2 || tileh == 4 || tileh == 8) )) { // partly up if (existing != 0) { return 0; } else if (!_patches.build_on_slopes || (_is_ai_player && !_patches.ainew_active)) { 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(uint32 rail) {return rail <= 5;} /** 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 combination to build */ int32 CmdBuildSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2) { TileIndex tile; uint tileh; uint m5; uint rail_bit; int32 cost = 0; int32 ret; if (!ValParamRailtype(p1) || !ValParamTrackOrientation(p2)) return CMD_ERROR; tile = TILE_FROM_XY(x, y); tileh = GetTileSlope(tile, NULL); m5 = _map5[tile]; rail_bit = 1 << p2; SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); switch (GetTileType(tile)) { case MP_TUNNELBRIDGE: if ((m5 & 0xC0) != 0xC0 || // not bridge middle part? (m5 & 0x01 ? 1 : 2) != rail_bit) { // wrong direction? // Get detailed error message return DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); } switch (m5 & 0x38) { // what's under the bridge? case 0x00: // clear land ret = CheckRailSlope(tileh, rail_bit, 0, tile); if (CmdFailed(ret)) return ret; cost += ret; if (flags & DC_EXEC) { _map_owner[tile] = _current_player; _map3_lo[tile] &= ~0x0F; _map3_lo[tile] |= p1; _map5[tile] = (m5 & 0xC7) | 0x20; // railroad under bridge } break; case 0x20: // rail already there return_cmd_error(STR_1007_ALREADY_BUILT); default: // Get detailed error message return DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); } break; case MP_RAILWAY: if (!CheckTrackCombination(m5, rail_bit, flags) || !EnsureNoVehicle(tile)) { return CMD_ERROR; } if (m5 & RAIL_TYPE_SPECIAL || _map_owner[tile] != _current_player || (_map3_lo[tile] & 0xFU) != p1) { // Get detailed error message return DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); } ret = CheckRailSlope(tileh, rail_bit, m5 & RAIL_BIT_MASK, tile); if (CmdFailed(ret)) return ret; cost += ret; if (flags & DC_EXEC) { _map2[tile] &= ~RAIL_MAP2LO_GROUND_MASK; // Bare land _map5[tile] = m5 | rail_bit; } break; case MP_STREET: if (!_valid_tileh_slopes[3][tileh]) // prevent certain slopes return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); if (!EnsureNoVehicle(tile)) return CMD_ERROR; if ((m5 & 0xF0) == 0 && ( // normal road? (rail_bit == 1 && m5 == 0x05) || (rail_bit == 2 && m5 == 0x0A) // correct direction? )) { if (flags & DC_EXEC) { _map3_lo[tile] = _map_owner[tile]; _map_owner[tile] = _current_player; _map3_hi[tile] = p1; _map5[tile] = 0x10 | (rail_bit == 1 ? 0x08 : 0x00); // level crossing } break; } if ((m5 & 0xF0) == 0x10 && (m5 & 0x08 ? 1 : 2) == rail_bit) return_cmd_error(STR_1007_ALREADY_BUILT); /* FALLTHROUGH */ default: ret = CheckRailSlope(tileh, rail_bit, 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) { SetTileType(tile, MP_RAILWAY); _map_owner[tile] = _current_player; _map2[tile] = 0; // Bare land _map3_lo[tile] = p1; // No signals, rail type _map5[tile] = rail_bit; } break; } if (flags & DC_EXEC) { MarkTileDirtyByTile(tile); SetSignalsOnBothDir(tile, p2); } return cost + _price.build_rail; } static const byte _signals_table[] = { 0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0, // direction 1 0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0 // direction 2 }; static const byte _signals_table_other[] = { 0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0, // direction 1 0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0 // direction 2 }; static const byte _signals_table_both[] = { 0xC0, 0xC0, 0xC0, 0x30, 0xC0, 0x30, 0, 0, // both directions combined 0xC0, 0xC0, 0xC0, 0x30, 0xC0, 0x30, 0, 0 }; /** 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) { TileInfo ti; TileIndex tile; byte rail_bit = 1 << p2; if (!ValParamTrackOrientation(p2)) return CMD_ERROR; SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); FindLandscapeHeight(&ti, x, y); tile = ti.tile; if (!((1< 0)) || ((trdx >= 0) && (dx < 0)) || ((trdy <= 0) && (dy > 0)) || ((trdy >= 0) && (dy < 0))) { if (!HASBIT(*railbit, 3)) { // first direction is invalid, try the other SETBIT(*railbit, 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 (*railbit & 0x6) { trdx = _railbit.xinc[*railbit]; trdy = _railbit.yinc[*railbit]; 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 * - 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; byte railbit = (p2 >> 4) & 7; byte mode = HASBIT(p2, 7); if (!ValParamRailtype(p2 & 0x3) || !ValParamTrackOrientation(railbit)) return CMD_ERROR; if (p1 > MapSize()) return CMD_ERROR; /* unpack end point */ ex = TileX(p1) * 16; ey = TileY(p1) * 16; SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); if (CmdFailed(ValidateAutoDrag(&railbit, x, y, ex, ey))) return CMD_ERROR; if (flags & DC_EXEC) SndPlayTileFx(SND_20_SPLAT_2, TILE_FROM_XY(x,y)); for(;;) { ret = DoCommand(x, y, p2 & 0x3, railbit & 7, 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[railbit]; y += _railbit.yinc[railbit]; // toggle railbit for the non-diagonal tracks if (railbit & 0x6) railbit ^= 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 NW, 1 is NE, etc. */ int32 CmdBuildTrainDepot(int x, int y, uint32 flags, uint32 p1, uint32 p2) { Depot *d; TileIndex tile = TILE_FROM_XY(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); if (tileh != 0) { if ((!_patches.ainew_active && _is_ai_player) || !_patches.build_on_slopes || (tileh & 0x10 || !((0x4C >> 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 (_current_player == _local_player) _last_built_train_depot_tile = (TileIndex)tile; ModifyTile(tile, MP_SETTYPE(MP_RAILWAY) | MP_MAP3LO | MP_MAPOWNER_CURRENT | MP_MAP5, p1, /* map3_lo */ p2 | RAIL_TYPE_DEPOT /* map5 */ ); d->xy = tile; d->town_index = ClosestTownFromTile(tile, (uint)-1)->index; SetSignalsOnBothDir(tile, (p2&1) ? 2 : 1); } 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 * - p1 = (bit 3) - choose semaphores/signals or cycle normal/pre/exit/combo depending on context * @param p2 used for CmdBuildManySignals() to copy style of first signal */ int32 CmdBuildSingleSignal(int x, int y, uint32 flags, uint32 p1, uint32 p2) { TileIndex tile = TILE_FROM_XY(x, y); bool semaphore; bool pre_signal; uint track = p1 & 0x7; byte m5; int32 cost; if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicle(tile)) return CMD_ERROR; /* Protect against invalid signal copying */ if (p2 != 0 && (p2 & _signals_table_both[track]) == 0) return CMD_ERROR; m5 = _map5[tile]; /* You can't build signals in a depot, and the selected track must exist */ if (m5 & 0x80 || !HASBIT(m5, track)) return CMD_ERROR; if (!CheckTileOwnership(tile)) return CMD_ERROR; _error_message = STR_1005_NO_SUITABLE_RAILROAD_TRACK; { byte m = m5 & RAIL_BIT_MASK; if (m != RAIL_BIT_DIAG1 && m != RAIL_BIT_DIAG2 && m != RAIL_BIT_UPPER && m != RAIL_BIT_LOWER && m != RAIL_BIT_LEFT && m != RAIL_BIT_RIGHT && m != (RAIL_BIT_UPPER | RAIL_BIT_LOWER) && m != (RAIL_BIT_LEFT | RAIL_BIT_RIGHT)) return CMD_ERROR; } SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); // Same bit, used in different contexts semaphore = pre_signal = HASBIT(p1, 3); if ((_map3_lo[tile] & _signals_table_both[track]) == 0) { // build new signals cost = _price.build_signals; } else { if (p2 != 0 && ((semaphore && !HASBIT(_map3_hi[tile], 2)) || (!semaphore && HASBIT(_map3_hi[tile], 2)))) { // 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 (!(m5 & RAIL_TYPE_SIGNALS)) { // there are no signals at all on this tile yet _map5[tile] |= RAIL_TYPE_SIGNALS; // change into signals _map2[tile] |= 0xF0; // all signals are on _map3_lo[tile] &= ~0xF0; // no signals built by default _map3_hi[tile] = semaphore ? 4 : 0; } if (p2 == 0) { if ((_map3_lo[tile] & _signals_table_both[track]) == 0) { // build new signals _map3_lo[tile] |= _signals_table_both[track]; } else { if (pre_signal) { // cycle between normal -> pre -> exit -> combo -> ... byte type = (_map3_hi[tile] + 1) & 0x03; _map3_hi[tile] &= ~0x03; _map3_hi[tile] |= type; } else { // cycle between two-way -> one-way -> one-way -> ... switch (track) { case 3: case 5: { byte signal = (_map3_lo[tile] - 0x10) & 0x30; if (signal == 0) signal = 0x30; _map3_lo[tile] &= ~0x30; _map3_lo[tile] |= signal; break; } default: { byte signal = (_map3_lo[tile] - 0x40) & 0xC0; if (signal == 0) signal = 0xC0; _map3_lo[tile] &= ~0xC0; _map3_lo[tile] |= signal; break; } } } } } else { /* If CmdBuildManySignals is called with copying signals, just copy the * style of the first signal given as parameter by CmdBuildManySignals */ _map3_lo[tile] &= ~_signals_table_both[track]; _map3_lo[tile] |= p2 & _signals_table_both[track]; // convert between signal<->semaphores when dragging if (semaphore) SETBIT(_map3_hi[tile], 2); else CLRBIT(_map3_hi[tile], 2); } 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 * - 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 m5, signals; TileIndex tile = TILE_FROM_XY(x, y); bool error = true; int mode = p2 & 0x1; byte semaphores = (HASBIT(p2, 3)) ? 8 : 0; byte railbit = (p2 >> 4) & 0x7; byte signal_density = (p2 >> 24); if (p1 > MapSize()) return CMD_ERROR; if (signal_density == 0 || signal_density > 20) 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 (railbit & 0x6) signal_density *= 2; // unpack end tile ex = TileX(p1) * 16; ey = TileY(p1) * 16; if (CmdFailed(ValidateAutoDrag(&railbit, x, y, ex, ey))) return CMD_ERROR; // copy the signal-style of the first rail-piece if existing m5 = _map5[tile]; if (!(m5 & RAIL_TYPE_SPECIAL) && (m5 & RAIL_BIT_MASK) && (m5 & RAIL_TYPE_SIGNALS)) { signals = _map3_lo[tile] & _signals_table_both[railbit]; if (signals == 0) signals = _signals_table_both[railbit]; semaphores = (_map3_hi[tile] & ~3) ? 8 : 0; // copy signal/semaphores style (independent of CTRL) } else // no signals exist, drag a two-way signal stretch signals = _signals_table_both[railbit]; /* signal_density_ctr - amount of tiles already processed * signals_density - patch setting to put signal on every Nth tile (double space on |, -- tracks) ********** * railbit - direction of 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, (railbit & 7) | 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[railbit]; y += _railbit.yinc[railbit]; signal_ctr++; // toggle railbit for the non-diagonal tracks (|, -- tracks) if (railbit & 0x6) railbit ^= 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 combination to remove signal from */ int32 CmdRemoveSingleSignal(int x, int y, uint32 flags, uint32 p1, uint32 p2) { TileIndex tile = TILE_FROM_XY(x, y); uint track = p1 & 0x7; if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicle(tile)) return CMD_ERROR; if ((_map5[tile] & RAIL_TYPE_MASK) != RAIL_TYPE_SIGNALS || (_map3_lo[tile] & _signals_table_both[track]) == 0) // 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) { _map3_lo[tile] &= ~_signals_table_both[track]; /* removed last signal from tile? */ if ((_map3_lo[tile] & 0xF0) == 0) { _map5[tile] &= ~RAIL_TYPE_SIGNALS; _map2[tile] &= ~0xF0; CLRBIT(_map3_hi[tile], 2); // 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(uint tile, uint totype, bool exec); static int32 DoConvertRail(uint tile, uint totype, bool exec) { if (!CheckTileOwnership(tile) || !EnsureNoVehicle(tile)) return CMD_ERROR; // tile is already of requested type? if ( (uint)(_map3_lo[tile] & 0xF) == totype) return CMD_ERROR; // change type. if (exec) { _map3_lo[tile] = (_map3_lo[tile] & 0xF0) + totype; MarkTileDirtyByTile(tile); } return _price.build_rail >> 1; } extern int32 DoConvertStationRail(uint tile, uint totype, bool exec); extern int32 DoConvertStreetRail(uint tile, uint totype, bool exec); extern int32 DoConvertTunnelBridgeRail(uint 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) * 16; sy = TileY(p1) * 16; if (ex < sx) intswap(ex, sx); if (ey < sy) intswap(ey, sy); money = GetAvailableMoneyForCommand(); cost = 0; for (x = sx; x <= ex; x += 16) { for (y = sy; y <= ey; y += 16) { TileIndex tile = TILE_FROM_XY(x,y); DoConvertRailProc *proc; if (IsTileType(tile, MP_RAILWAY)) proc = DoConvertRail; else if (IsTileType(tile, MP_STATION)) proc = DoConvertStationRail; else if (IsTileType(tile, MP_STREET)) proc = DoConvertStreetRail; else if (IsTileType(tile, MP_TUNNELBRIDGE)) proc = DoConvertTunnelBridgeRail; else continue; ret = proc(tile, p2, false); if (CmdFailed(ret)) continue; cost += ret; if (flags & DC_EXEC) { if ( (money -= ret) < 0) { _additional_cash_required = ret; return cost - ret; } proc(tile, p2, true); } } } return (cost == 0) ? CMD_ERROR : cost; } static int32 RemoveTrainDepot(uint tile, uint32 flags) { if (!CheckTileOwnership(tile) && _current_player != OWNER_WATER) return CMD_ERROR; if (!EnsureNoVehicle(tile)) return CMD_ERROR; if (flags & DC_EXEC) { int track = _map5[tile] & RAIL_DEPOT_TRACK_MASK; DoDeleteDepot(tile); SetSignalsOnBothDir(tile, track); } return _price.remove_train_depot; } static int32 ClearTile_Track(TileIndex tile, byte flags) { int32 cost; int32 ret; byte m5; m5 = _map5[tile]; if (flags & DC_AUTO) { if (m5 & RAIL_TYPE_SPECIAL) return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED); if (_map_owner[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 (m5 & RAIL_TYPE_MASK) { case RAIL_TYPE_SIGNALS: if (_map3_lo[tile] & _signals_table_both[0]) { ret = DoCommandByTile(tile, 0, 0, flags, CMD_REMOVE_SIGNALS); if (ret == CMD_ERROR) return CMD_ERROR; cost += ret; } if (_map3_lo[tile] & _signals_table_both[3]) { ret = DoCommandByTile(tile, 3, 0, flags, CMD_REMOVE_SIGNALS); if (ret == CMD_ERROR) return CMD_ERROR; cost += ret; } m5 &= RAIL_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 (ret == CMD_ERROR) return CMD_ERROR; cost += ret; } } return cost; } case RAIL_TYPE_DEPOT: 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, // use semaphores instead of signals? 0x1353, 0x1363, 0x1373, 0x1383, // mirrored versions 0x4FB, 0x1323, 0x1333, 0x1343, 0x13C6, 0x13D6, 0x13E6, 0x13F6, }; // 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(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[(_map3_hi[ti->tile] & 7) + (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(TileInfo *ti) { uint32 image = 0x515; if (ti->tileh != 0) { image = 0x519; if (!(ti->tileh & 2)) { image = 0x51B; } } AddSortableSpriteToDraw(image | _drawtile_track_palette, ti->x, ti->y+1, 16, 1, 4, ti->z); } static void DrawTrackFence_SE(TileInfo *ti) { uint32 image = 0x515; if (ti->tileh != 0) { image = 0x519; if (!(ti->tileh & 2)) { image = 0x51B; } } AddSortableSpriteToDraw(image | _drawtile_track_palette, ti->x, ti->y+15, 16, 1, 4, ti->z); } static void DrawTrackFence_NW_SE(TileInfo *ti) { DrawTrackFence_NW(ti); DrawTrackFence_SE(ti); } static void DrawTrackFence_NE(TileInfo *ti) { uint32 image = 0x516; if (ti->tileh != 0) { image = 0x51A; if (!(ti->tileh & 2)) { image = 0x51C; } } AddSortableSpriteToDraw(image | _drawtile_track_palette, ti->x+1, ti->y, 1, 16, 4, ti->z); } static void DrawTrackFence_SW(TileInfo *ti) { uint32 image = 0x516; if (ti->tileh != 0) { image = 0x51A; if (!(ti->tileh & 2)) { image = 0x51C; } } AddSortableSpriteToDraw(image | _drawtile_track_palette, ti->x+15, ti->y, 1, 16, 4, ti->z); } static void DrawTrackFence_NE_SW(TileInfo *ti) { DrawTrackFence_NE(ti); DrawTrackFence_SW(ti); } static void DrawTrackFence_NS_1(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(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(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(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(TileInfo *ti) { /* nothing should be here */ } typedef void DetailedTrackProc(TileInfo *ti); DetailedTrackProc * const _detailed_track_proc[16] = { 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 tracktype_offs, TileInfo *ti, byte x, byte y, byte z, byte xsize, byte ysize, byte zsize) { if (image & 0x8000) image |= _drawtile_track_palette; image += tracktype_offs; if (_display_opt & DO_TRANS_BUILDINGS) // show transparent depots image = (image & 0x3FFF) | 0x3224000; AddSortableSpriteToDraw(image, ti->x + x, ti->y + y, xsize, ysize, zsize, ti->z + z); } static void DrawTile_Track(TileInfo *ti) { uint32 tracktype_offs, image; byte m5; _drawtile_track_palette = SPRITE_PALETTE(PLAYER_SPRITE_COLOR(_map_owner[ti->tile])); tracktype_offs = (_map3_lo[ti->tile] & 0xF) * TRACKTYPE_SPRITE_PITCH; m5 = (byte)ti->map5; if (!(m5 & RAIL_TYPE_SPECIAL)) { bool special; m5 &= RAIL_BIT_MASK; special = false; // select the sprite to use based on the map5 byte. (image = 0x3F3, m5 == RAIL_BIT_DIAG2) || (image++, m5 == RAIL_BIT_DIAG1) || (image++, m5 == RAIL_BIT_UPPER) || (image++, m5 == RAIL_BIT_LOWER) || (image++, m5 == RAIL_BIT_RIGHT) || (image++, m5 == RAIL_BIT_LEFT) || (image++, m5 == (RAIL_BIT_DIAG1|RAIL_BIT_DIAG2)) || (image = 0x40B, m5 == (RAIL_BIT_UPPER|RAIL_BIT_LOWER)) || (image++, m5 == (RAIL_BIT_LEFT|RAIL_BIT_RIGHT)) || (special=true, false) || (image = 0x3FA, !(m5 & (RAIL_BIT_RIGHT|RAIL_BIT_UPPER|RAIL_BIT_DIAG1))) || (image++, !(m5 & (RAIL_BIT_LEFT|RAIL_BIT_LOWER|RAIL_BIT_DIAG1))) || (image++, !(m5 & (RAIL_BIT_LEFT|RAIL_BIT_UPPER|RAIL_BIT_DIAG2))) || (image++, !(m5 & (RAIL_BIT_RIGHT|RAIL_BIT_LOWER|RAIL_BIT_DIAG2))) || (image++, true); if (ti->tileh != 0) { int f = GetRailFoundation(ti->tileh, ti->map5 & 0x3F); if (f) DrawFoundation(ti, f); // default sloped sprites.. if (ti->tileh != 0) image = _track_sloped_sprites[ti->tileh - 1] + 0x3F3; } if ((_map2[ti->tile] & RAIL_MAP2LO_GROUND_MASK)==RAIL_GROUND_BROWN) image = (image & 0xFFFF) | 0x3178000; // use a brown palette else if ((_map2[ti->tile] & RAIL_MAP2LO_GROUND_MASK)==RAIL_GROUND_ICE_DESERT) image += 26; DrawGroundSprite(image + tracktype_offs); if (special) { if (m5 & RAIL_BIT_DIAG1) DrawGroundSprite(0x3ED + tracktype_offs); if (m5 & RAIL_BIT_DIAG2) DrawGroundSprite(0x3EE + tracktype_offs); if (m5 & RAIL_BIT_UPPER) DrawGroundSprite(0x3EF + tracktype_offs); if (m5 & RAIL_BIT_LOWER) DrawGroundSprite(0x3F0 + tracktype_offs); if (m5 & RAIL_BIT_LEFT) DrawGroundSprite(0x3F2 + tracktype_offs); if (m5 & RAIL_BIT_RIGHT) DrawGroundSprite(0x3F1 + tracktype_offs); } if (_display_opt & DO_FULL_DETAIL) { _detailed_track_proc[_map2[ti->tile] & RAIL_MAP2LO_GROUND_MASK](ti); } /* draw signals also? */ if (!(ti->map5 & RAIL_TYPE_SIGNALS)) return; { byte m23; m23 = (_map3_lo[ti->tile] >> 4) | (_map2[ti->tile] & 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 & RAIL_BIT_DIAG2)) { if (!(m5 & RAIL_BIT_DIAG1)) { if (m5 & RAIL_BIT_LEFT) { MAYBE_DRAW_SIGNAL(2, 0x509, 0); MAYBE_DRAW_SIGNAL(3, 0x507, 1); } if (m5 & RAIL_BIT_RIGHT) { MAYBE_DRAW_SIGNAL(0, 0x509, 2); MAYBE_DRAW_SIGNAL(1, 0x507, 3); } if (m5 & RAIL_BIT_UPPER) { MAYBE_DRAW_SIGNAL(3, 0x505, 4); MAYBE_DRAW_SIGNAL(2, 0x503, 5); } if (m5 & RAIL_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 (!(m5 & (RAIL_TYPE_MASK&~RAIL_TYPE_SPECIAL))) return; if (ti->tileh != 0) { DrawFoundation(ti, ti->tileh); } if (IsRailWaypoint(m5) && _map3_lo[ti->tile] & 16) { // look for customization StationSpec *stat = GetCustomStation(STAT_CLASS_WAYP, _map3_hi[ti->tile]); if (stat) { DrawTileSeqStruct const *seq; // emulate station tile - open with building DrawTileSprites *cust = &stat->renderdata[2 + (m5 & 0x1)]; uint32 relocation = GetCustomStationRelocation(stat, ComposeWaypointStation(ti->tile), 0); int railtype=(_map3_lo[ti->tile] & 0xF); /* 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 += railtype*((image<_custom_sprites_base)?TRACKTYPE_SPRITE_PITCH:1); DrawGroundSprite(image); foreach_draw_tile_seq(seq, cust->seq) { uint32 image = seq->image + relocation; DrawSpecialBuilding(image, 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; if (image & 0x8000) image = (image & 0x7FFF) + tracktype_offs; // adjust ground tile for desert // (don't adjust for arctic depots, because snow in depots looks weird) if ((_map2[ti->tile] & RAIL_MAP2LO_GROUND_MASK)==RAIL_GROUND_ICE_DESERT && (_opt.landscape == LT_DESERT || type>=4)) { if(image!=3981) image += 26; // tile with tracks else image = 4550; // flat ground } DrawGroundSprite(image); while ((image=drss->image) != 0) { DrawSpecialBuilding(image, type < 4 ? tracktype_offs : 0, ti, drss->subcoord_x, drss->subcoord_y, 0, drss->width, drss->height, 0x17); drss++; } } } void DrawTrainDepotSprite(int x, int y, int image, int railtype) { uint32 ormod, img; const DrawTrackSeqStruct *dtss; /* baseimage */ railtype *= TRACKTYPE_SPRITE_PITCH; ormod = PLAYER_SPRITE_COLOR(_local_player); dtss = _track_depot_layout_table[image]; x+=33; y+=17; img = dtss++->image; if (img & 0x8000) img = (img & 0x7FFF) + railtype; DrawSprite(img, x, y); for (; dtss->image != 0; dtss++) { Point pt = RemapCoords(dtss->subcoord_x, dtss->subcoord_y, 0); image = dtss->image; if (image & 0x8000) image |= ormod; DrawSprite(image + railtype, x + pt.x, y + pt.y); } } #define NUM_SSD_ENTRY 256 #define NUM_SSD_STACK 32 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(uint tile, SetSignalsData *ssd, int track, uint length, byte *state) { // the tile has signals? if (IsTileType(tile, MP_RAILWAY)) { if ((_map5[tile]&RAIL_TYPE_MASK) == RAIL_TYPE_SIGNALS) { if ((_map3_lo[tile] & _signals_table_both[track]) != 0) { // is the signal pointing in to the segment existing? if ((_map3_lo[tile] & _signals_table[track]) != 0) { // 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 |= (_map3_hi[tile]&1); } // is this an exit signal that points out from the segment? if ((_map3_hi[tile]&2) && _map3_lo[tile]&_signals_table_other[track]) { ssd->presignal_exits++; if ((_map2[tile]&_signals_table_other[track]) != 0) ssd->presignal_exits_free++; } return true; } } else if (IsRailDepot(_map5[tile])) 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) { 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 */ bool SignalVehicleCheck(TileIndex tile, uint track) { SignalVehicleCheckStruct dest; dest.tile = tile; dest.track = track; if (GetTileType(tile)==MP_TUNNELBRIDGE && ((_map5[tile] & 0xF0)==0)) { // It is a tunnel we're checking, we need to do some special stuff // because VehicleFromPos will not find the vihicle otherwise byte direction = _map5[tile] & 3; FindLengthOfTunnelResult flotr; flotr = FindLengthOfTunnel(tile, direction); 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(flotr.tile, &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 != flotr.tile; tile += TileOffsByDir(direction)) { if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL) return true; } // no vehicle found return false; } else { return VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL; }; } static void SetSignalsAfterProc(TrackPathFinder *tpf) { SetSignalsData *ssd = tpf->userdata; 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++) { uint tile = ssd->tile[i]; byte bit = _signals_table[ssd->bit[i]]; uint16 m2 = _map2[tile]; // presignals don't turn green if there is at least one presignal exit and none are free if (_map3_hi[tile] & 1) { int ex = ssd->presignal_exits, exfree = ssd->presignal_exits_free; // subtract for dual combo signals so they don't count themselves if (_map3_hi[tile]&2 && _map3_lo[tile]&_signals_table_other[ssd->bit[i]]) { ex--; if ((_map2[tile]&_signals_table_other[ssd->bit[i]]) != 0) 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 (_map3_hi[tile] & 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 _map2[tile] = m2 ^ bit; MarkTileDirtyByTile(tile); } } bool UpdateSignalsOnSegment(uint tile, byte direction) { SetSignalsData ssd; int result = -1; ssd.cur_stack = 0; direction>>=1; 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) 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 (bool)result; } void SetSignalsOnBothDir(uint tile, byte track) { static const byte _search_dir_1[6] = {1, 3, 1, 3, 5, 3}; static const byte _search_dir_2[6] = {5, 7, 7, 5, 7, 1}; UpdateSignalsOnSegment(tile, _search_dir_1[track]); UpdateSignalsOnSegment(tile, _search_dir_2[track]); } static uint GetSlopeZ_Track(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 & 0xC0) == 0xC0) { // depot or waypoint return z + 8; } return GetPartialZ(ti->x&0xF, ti->y&0xF, th) + z; } return z; } static uint GetSlopeTileh_Track(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(uint tile, AcceptedCargo ac) { /* not used */ } static void AnimateTile_Track(uint tile) { /* not used */ } static void TileLoop_Track(uint tile) { byte a2; byte rail; uint16 m2; byte owner; m2 = _map2[tile] & 0xF; /* special code for alps landscape */ if (_opt.landscape == LT_HILLY) { /* convert into snow? */ if (GetTileZ(tile) > _opt.snow_line) { a2 = RAIL_GROUND_ICE_DESERT; goto modify_me; } /* special code for desert landscape */ } else if (_opt.landscape == LT_DESERT) { /* convert into desert? */ if (GetMapExtraBits(tile) == 1) { a2 = RAIL_GROUND_ICE_DESERT; goto modify_me; } } // Don't continue tile loop for depots if (_map5[tile] & RAIL_TYPE_SPECIAL) return; a2 = RAIL_GROUND_GREEN; if (m2 != RAIL_GROUND_BROWN) { /* wait until bottom is green */ /* determine direction of fence */ rail = _map5[tile] & RAIL_BIT_MASK; if (rail == RAIL_BIT_UPPER) { a2 = RAIL_GROUND_FENCE_HORIZ1; } else if (rail == RAIL_BIT_LOWER) { a2 = RAIL_GROUND_FENCE_HORIZ2; } else if (rail == RAIL_BIT_LEFT) { a2 = RAIL_GROUND_FENCE_VERT1; } else if (rail == RAIL_BIT_RIGHT) { a2 = RAIL_GROUND_FENCE_VERT2; } else { owner = _map_owner[tile]; if ( (!(rail&(RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LEFT)) && (rail&RAIL_BIT_DIAG1)) || rail==(RAIL_BIT_LOWER|RAIL_BIT_RIGHT)) { if (!IsTileType(tile + TILE_XY(0,-1), MP_RAILWAY) || owner != _map_owner[tile + TILE_XY(0,-1)] || (_map5[tile + TILE_XY(0,-1)]==RAIL_BIT_UPPER || _map5[tile + TILE_XY(0,-1)]==RAIL_BIT_LEFT)) a2 = RAIL_GROUND_FENCE_NW; } if ( (!(rail&(RAIL_BIT_DIAG2|RAIL_BIT_LOWER|RAIL_BIT_RIGHT)) && (rail&RAIL_BIT_DIAG1)) || rail==(RAIL_BIT_UPPER|RAIL_BIT_LEFT)) { if (!IsTileType(tile + TILE_XY(0,1), MP_RAILWAY) || owner != _map_owner[tile + TILE_XY(0,1)] || (_map5[tile + TILE_XY(0,1)]==RAIL_BIT_LOWER || _map5[tile + TILE_XY(0,1)]==RAIL_BIT_RIGHT)) a2 = (a2 == RAIL_GROUND_FENCE_NW) ? RAIL_GROUND_FENCE_SENW : RAIL_GROUND_FENCE_SE; } if ( (!(rail&(RAIL_BIT_DIAG1|RAIL_BIT_UPPER|RAIL_BIT_RIGHT)) && (rail&RAIL_BIT_DIAG2)) || rail==(RAIL_BIT_LOWER|RAIL_BIT_LEFT)) { if (!IsTileType(tile + TILE_XY(-1,0), MP_RAILWAY) || owner != _map_owner[tile + TILE_XY(-1,0)] || (_map5[tile + TILE_XY(-1,0)]==RAIL_BIT_UPPER || _map5[tile + TILE_XY(-1,0)]==RAIL_BIT_RIGHT)) a2 = RAIL_GROUND_FENCE_NE; } if ( (!(rail&(RAIL_BIT_DIAG1|RAIL_BIT_LOWER|RAIL_BIT_LEFT)) && (rail&RAIL_BIT_DIAG2)) || rail==(RAIL_BIT_UPPER|RAIL_BIT_RIGHT)) { if (!IsTileType(tile + TILE_XY(1,0), MP_RAILWAY) || owner != _map_owner[tile + TILE_XY(1,0)] || (_map5[tile + TILE_XY(1,0)]==RAIL_BIT_LOWER || _map5[tile + TILE_XY(1,0)]==RAIL_BIT_LEFT)) a2 = (a2 == RAIL_GROUND_FENCE_NE) ? RAIL_GROUND_FENCE_NESW : RAIL_GROUND_FENCE_SW; } } } modify_me:; /* tile changed? */ if ( m2 != a2) { _map2[tile] = (_map2[tile] & ~RAIL_MAP2LO_GROUND_MASK) | a2; MarkTileDirtyByTile(tile); } } static uint32 GetTileTrackStatus_Track(uint tile, TransportType mode) { byte m5, a; uint16 b; uint32 ret; if (mode != TRANSPORT_RAIL) return 0; m5 = _map5[tile]; if (!(m5 & RAIL_TYPE_SPECIAL)) { ret = (m5 | (m5 << 8)) & 0x3F3F; if (!(m5 & RAIL_TYPE_SIGNALS)) { if ( (ret & 0xFF) == 3) /* Diagonal crossing? */ ret |= 0x40; } else { /* has_signals */ a = _map3_lo[tile]; b = _map2[tile]; b &= a; /* When signals are not present (in neither * direction), we pretend them to be green. (So if * signals are only one way, the other way will * implicitely become `red' */ if ((a & 0xC0) == 0) { b |= 0xC0; } if ((a & 0x30) == 0) { b |= 0x30; } if ( (b & 0x80) == 0) ret |= 0x10070000; if ( (b & 0x40) == 0) ret |= 0x7100000; if ( (b & 0x20) == 0) ret |= 0x20080000; if ( (b & 0x10) == 0) ret |= 0x8200000; } } 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(uint tile) { if (IsRailDepot(_map5[tile])) ShowTrainDepotWindow(tile); else if (IsRailWaypoint(_map5[tile])) ShowRenameWaypointWindow(GetWaypointByTile(tile)); } static void GetTileDesc_Track(TileIndex tile, TileDesc *td) { td->owner = _map_owner[tile]; switch (_map5[tile] & RAIL_TYPE_MASK) { 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[_map3_hi[tile] & 0x03]; break; } case RAIL_TYPE_DEPOT: default: td->str = ((_map5[tile] & RAIL_SUBTYPE_MASK) == RAIL_SUBTYPE_DEPOT) ? STR_1023_RAILROAD_TRAIN_DEPOT : STR_LANDINFO_WAYPOINT; break; } } static void ChangeTileOwner_Track(uint tile, byte old_player, byte new_player) { if (_map_owner[tile] != old_player) return; if (new_player != 255) { _map_owner[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 _fractcoords_leave[4] = { 0x81, 0xD8, 0x8D, 0x18 }; static const byte _enter_directions[4] = {5, 7, 1, 3}; static const byte _leave_directions[4] = {1, 3, 5, 7}; static const byte _depot_track_mask[4] = {1, 2, 1, 2}; static uint32 VehicleEnter_Track(Vehicle *v, uint tile, int x, int y) { byte fract_coord; int dir; // this routine applies only to trains in depot tiles if (v->type != VEH_Train || !IsRailDepot(_map5[tile])) return 0; /* depot direction */ dir = _map5[tile] & RAIL_DEPOT_DIR; 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 (_enter_directions[dir] == v->direction) { /* enter the depot */ v->u.rail.track = 0x80, v->vehstatus |= VS_HIDDEN; /* hide it */ v->direction ^= 4; if (v->next == NULL) TrainEnterDepot(v, tile); v->tile = tile; InvalidateWindow(WC_VEHICLE_DEPOT, tile); return 4; } } else if (_fractcoords_leave[dir] == fract_coord) { if (_leave_directions[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 */ };