/** * Callback executed after a build Bridge CMD has been called * * @param result Whether the build succeeded * @param end_tile End tile of the bridge. * @param p1 packed start tile coords (~ dx) * @param p2 various bitstuffed elements * - p2 = (bit 0- 7) - bridge type (hi bh) * - p2 = (bit 8-11) - rail type or road types. * - p2 = (bit 15-16) - transport type. */ void CcBuildBridge(const CommandCost &result, TileIndex end_tile, uint32 p1, uint32 p2) { if (result.Failed()) return; if (_settings_client.sound.confirm) SndPlayTileFx(SND_27_BLACKSMITH_ANVIL, end_tile); TransportType transport_type = Extract<TransportType, 15, 2>(p2); if (transport_type == TRANSPORT_ROAD) { DiagDirection end_direction = ReverseDiagDir(GetTunnelBridgeDirection(end_tile)); ConnectRoadToStructure(end_tile, end_direction); DiagDirection start_direction = ReverseDiagDir(GetTunnelBridgeDirection(p1)); ConnectRoadToStructure(p1, start_direction); } }
/** * Callback executed after a build road tunnel command has been called. * * @param result Whether the build succeeded. * @param start_tile Starting tile of the tunnel. * @param p1 bit 0-3 railtype or roadtypes * bit 8-9 transport type * @param p2 unused */ void CcBuildRoadTunnel(const CommandCost &result, TileIndex start_tile, uint32 p1, uint32 p2) { if (result.Succeeded()) { if (_settings_client.sound.confirm) SndPlayTileFx(SND_1F_SPLAT_OTHER, start_tile); if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace(); DiagDirection start_direction = ReverseDiagDir(GetTunnelBridgeDirection(start_tile)); ConnectRoadToStructure(start_tile, start_direction); TileIndex end_tile = GetOtherTunnelBridgeEnd(start_tile); DiagDirection end_direction = ReverseDiagDir(GetTunnelBridgeDirection(end_tile)); ConnectRoadToStructure(end_tile, end_direction); } else { SetRedErrorSquare(_build_tunnel_endtile); } }
/** * Gets the other end of the aqueduct, if possible. * @param tile_from The begin tile for the aqueduct. * @param [out] tile_to The tile till where to show a selection for the aqueduct. * @return The other end of the aqueduct, or otherwise a tile in line with the aqueduct to cause the right error message. */ static TileIndex GetOtherAqueductEnd(TileIndex tile_from, TileIndex *tile_to = NULL) { int z; DiagDirection dir = GetInclinedSlopeDirection(GetTileSlope(tile_from, &z)); /* If the direction isn't right, just return the next tile so the command * complains about the wrong slope instead of the ends not matching up. * Make sure the coordinate is always a valid tile within the map, so we * don't go "off" the map. That would cause the wrong error message. */ if (!IsValidDiagDirection(dir)) return TILE_ADDXY(tile_from, TileX(tile_from) > 2 ? -1 : 1, 0); /* Direction the aqueduct is built to. */ TileIndexDiff offset = TileOffsByDiagDir(ReverseDiagDir(dir)); /* The maximum length of the aqueduct. */ int max_length = min(_settings_game.construction.max_bridge_length, DistanceFromEdgeDir(tile_from, ReverseDiagDir(dir)) - 1); TileIndex endtile = tile_from; for (int length = 0; IsValidTile(endtile) && TileX(endtile) != 0 && TileY(endtile) != 0; length++) { endtile = TILE_ADD(endtile, offset); if (length > max_length) break; if (GetTileMaxZ(endtile) > z) { if (tile_to != NULL) *tile_to = endtile; break; } } return endtile; }
virtual void OnPlacePresize(Point pt, TileIndex tile_from) { DiagDirection dir = GetInclinedSlopeDirection(GetTileSlope(tile_from, NULL)); TileIndex tile_to = (dir != INVALID_DIAGDIR ? TileAddByDiagDir(tile_from, ReverseDiagDir(dir)) : tile_from); VpSetPresizeRange(tile_from, tile_to); }
/** * Is there a Chunnel in the way in the given direction? * Only between height level 0 and 1. * Used to avoid building bridge or tunnel between existing chunnel. * @param tile the tile to search from. * @param dir the direction to start searching to. * @return true if and only if there is a chunnel. */ bool IsBetweenChunnelPortals(TileIndex tile, DiagDirection dir) { uint h = 0; TileIndexDiff delta = TileOffsByDiagDir(dir); if (GetTileZ(tile) > 0) return false; do { if (dir == DIAGDIR_NE || dir == DIAGDIR_NW) { do { tile += delta; if (!IsValidTile(tile)) return false; } while (TileHeight(tile) != h); } else { tile += delta; do { tile += delta; if (!IsValidTile(tile)) return false; } while (TileHeight(tile) != h); tile -= delta; } (h == 0) ? h = 1 : h = 0; } while (!IsTunnelTile(tile)); if (GetTunnelBridgeDirection(tile) != ReverseDiagDir(dir)) return false; return true; }
static bool CheckShipLeaveDepot(Ship *v) { if (!v->IsChainInDepot()) return false; /* We are leaving a depot, but have to go to the exact same one; re-enter */ if (v->current_order.IsType(OT_GOTO_DEPOT) && IsShipDepotTile(v->tile) && GetDepotIndex(v->tile) == v->current_order.GetDestination()) { VehicleEnterDepot(v); return true; } TileIndex tile = v->tile; Axis axis = GetShipDepotAxis(tile); DiagDirection north_dir = ReverseDiagDir(AxisToDiagDir(axis)); TileIndex north_neighbour = TILE_ADD(tile, TileOffsByDiagDir(north_dir)); DiagDirection south_dir = AxisToDiagDir(axis); TileIndex south_neighbour = TILE_ADD(tile, 2 * TileOffsByDiagDir(south_dir)); TrackBits north_tracks = DiagdirReachesTracks(north_dir) & GetTileShipTrackStatus(north_neighbour); TrackBits south_tracks = DiagdirReachesTracks(south_dir) & GetTileShipTrackStatus(south_neighbour); if (north_tracks && south_tracks) { /* Ask pathfinder for best direction */ bool reverse = false; bool path_found; switch (_settings_game.pf.pathfinder_for_ships) { case VPF_OPF: reverse = OPFShipChooseTrack(v, north_neighbour, north_dir, north_tracks, path_found) == INVALID_TRACK; break; // OPF always allows reversing case VPF_NPF: reverse = NPFShipCheckReverse(v); break; case VPF_YAPF: reverse = YapfShipCheckReverse(v); break; default: NOT_REACHED(); } if (reverse) north_tracks = TRACK_BIT_NONE; } if (north_tracks) { /* Leave towards north */ v->direction = DiagDirToDir(north_dir); } else if (south_tracks) { /* Leave towards south */ v->direction = DiagDirToDir(south_dir); } else { /* Both ways blocked */ return false; } v->state = AxisToTrackBits(axis); v->vehstatus &= ~VS_HIDDEN; v->cur_speed = 0; v->UpdateViewport(true, true); SetWindowDirty(WC_VEHICLE_DEPOT, v->tile); PlayShipSound(v); VehicleServiceInDepot(v); InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile); SetWindowClassesDirty(WC_SHIPS_LIST); return false; }
inline int SwitchCost(TileIndex tile1, TileIndex tile2, DiagDirection exitdir) { if (IsPlainRailTile(tile1) && IsPlainRailTile(tile2)) { bool t1 = KillFirstBit(GetTrackBits(tile1) & DiagdirReachesTracks(ReverseDiagDir(exitdir))) != TRACK_BIT_NONE; bool t2 = KillFirstBit(GetTrackBits(tile2) & DiagdirReachesTracks(exitdir)) != TRACK_BIT_NONE; if (t1 && t2) return Yapf().PfGetSettings().rail_doubleslip_penalty; } return 0; }
static void TPFModeShip(TrackPathFinder *tpf, TileIndex tile, DiagDirection direction) { if (IsTileType(tile, MP_TUNNELBRIDGE)) { /* wrong track type */ if (GetTunnelBridgeTransportType(tile) != TRANSPORT_WATER) return; DiagDirection dir = GetTunnelBridgeDirection(tile); /* entering tunnel / bridge? */ if (dir == direction) { TileIndex endtile = GetOtherTunnelBridgeEnd(tile); tpf->rd.cur_length += GetTunnelBridgeLength(tile, endtile) + 1; tile = endtile; } else { /* leaving tunnel / bridge? */ if (ReverseDiagDir(dir) != direction) return; } } /* This addition will sometimes overflow by a single tile. * The use of TILE_MASK here makes sure that we still point at a valid * tile, and then this tile will be in the sentinel row/col, so GetTileTrackStatus will fail. */ tile = TILE_MASK(tile + TileOffsByDiagDir(direction)); if (++tpf->rd.cur_length > 50) return; TrackBits bits = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0)) & DiagdirReachesTracks(direction); if (bits == TRACK_BIT_NONE) return; assert(TileX(tile) != MapMaxX() && TileY(tile) != MapMaxY()); bool only_one_track = true; do { Track track = RemoveFirstTrack(&bits); if (bits != TRACK_BIT_NONE) only_one_track = false; RememberData rd = tpf->rd; /* Change direction 4 times only */ if (!only_one_track && track != tpf->rd.last_choosen_track) { if (++tpf->rd.depth > 4) { tpf->rd = rd; return; } tpf->rd.last_choosen_track = track; } tpf->the_dir = TrackEnterdirToTrackdir(track, direction); if (!ShipTrackFollower(tile, tpf, tpf->rd.cur_length)) { TPFModeShip(tpf, tile, TrackdirToExitdir(tpf->the_dir)); } tpf->rd = rd; } while (bits != TRACK_BIT_NONE); }
/** * If required, connects a new structure to an existing road or tram by building the missing roadbit. * @param tile Tile containing the structure to connect. * @param direction Direction to check. */ void ConnectRoadToStructure(TileIndex tile, DiagDirection direction) { tile += TileOffsByDiagDir(direction); /* if there is a roadpiece just outside of the station entrance, build a connecting route */ if (IsNormalRoadTile(tile)) { if (GetRoadBits(tile, _cur_roadtype) != ROAD_NONE) { DoCommandP(tile, _cur_roadtype << 4 | DiagDirToRoadBits(ReverseDiagDir(direction)), 0, CMD_BUILD_ROAD); } } }
static typename TileIndexT<Tgeneric>::T GetBridgeEnd(typename TileIndexT<Tgeneric>::T tile, DiagDirection dir) { TileIndexDiff delta = TileOffsByDiagDir<Tgeneric>(dir, MapOf(tile)); dir = ReverseDiagDir(dir); do { tile += delta; } while (!IsBridgeTile(tile) || GetTunnelBridgeDirection(tile) != dir); return tile; }
/** * Finds the end of a bridge in the specified direction starting at a middle tile * @param tile the bridge tile to find the bridge ramp for * @param dir the direction to search in */ static TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir) { TileIndexDiff delta = TileOffsByDiagDir(dir); dir = ReverseDiagDir(dir); do { tile += delta; } while (!IsBridgeTile(tile) || GetTunnelBridgeDirection(tile) != dir); return tile; }
/** * Command callback for building road stops. * @param result Result of the build road stop command. * @param tile Start tile. * @param p1 bit 0..7: Width of the road stop. * bit 8..15: Length of the road stop. * @param p2 bit 0: 0 For bus stops, 1 for truck stops. * bit 1: 0 For normal stops, 1 for drive-through. * bit 2..3: The roadtypes. * bit 5: Allow stations directly adjacent to other stations. * bit 6..7: Entrance direction (#DiagDirection). * bit 16..31: Station ID to join (NEW_STATION if build new one). * @see CmdBuildRoadStop */ void CcRoadStop(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2) { if (result.Failed()) return; DiagDirection dir = (DiagDirection)GB(p2, 6, 2); if (_settings_client.sound.confirm) SndPlayTileFx(SND_1F_SPLAT_OTHER, tile); if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace(); TileArea roadstop_area(tile, GB(p1, 0, 8), GB(p1, 8, 8)); TILE_AREA_LOOP(cur_tile, roadstop_area) { ConnectRoadToStructure(cur_tile, dir); /* For a drive-through road stop build connecting road for other entrance. */ if (HasBit(p2, 1)) ConnectRoadToStructure(cur_tile, ReverseDiagDir(dir)); }
static Trackdir ChooseShipTrack(const Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool &path_found) { /* handle special case - when next tile is destination tile */ if (tile == v->dest_tile) { /* convert tracks to trackdirs */ TrackdirBits trackdirs = (TrackdirBits)(tracks | ((int)tracks << 8)); /* limit to trackdirs reachable from enterdir */ trackdirs &= DiagdirReachesTrackdirs(enterdir); /* use vehicle's current direction if that's possible, otherwise use first usable one. */ Trackdir veh_dir = v->GetVehicleTrackdir(); return ((trackdirs & TrackdirToTrackdirBits(veh_dir)) != 0) ? veh_dir : (Trackdir)FindFirstBit2x64(trackdirs); } /* move back to the old tile/trackdir (where ship is coming from) */ TileIndex src_tile = TILE_ADD(tile, TileOffsByDiagDir(ReverseDiagDir(enterdir))); Trackdir trackdir = v->GetVehicleTrackdir(); assert(IsValidTrackdir(trackdir)); /* convert origin trackdir to TrackdirBits */ TrackdirBits trackdirs = TrackdirToTrackdirBits(trackdir); /* get available trackdirs on the destination tile */ TrackdirBits dest_trackdirs = TrackStatusToTrackdirBits(GetTileTrackStatus(v->dest_tile, TRANSPORT_WATER, 0)); /* create pathfinder instance */ Tpf pf; /* set origin and destination nodes */ pf.SetOrigin(src_tile, trackdirs); pf.SetDestination(v->dest_tile, dest_trackdirs); /* find best path */ path_found = pf.FindPath(v); Trackdir next_trackdir = INVALID_TRACKDIR; // this would mean "path not found" Node *pNode = pf.GetBestNode(); if (pNode != NULL) { /* walk through the path back to the origin */ Node *pPrevNode = NULL; while (pNode->m_parent != NULL) { pPrevNode = pNode; pNode = pNode->m_parent; } /* return trackdir from the best next node (direct child of origin) */ Node& best_next_node = *pPrevNode; assert(best_next_node.GetTile() == tile); next_trackdir = best_next_node.GetTrackdir(); } return next_trackdir; }
/* Will return the cost of the tunnel. If it is an entry, it will return the * cost of that tile. If the tile is an exit, it will return the tunnel length * including the exit tile. Requires that this is a Tunnel tile */ static uint NPFTunnelCost(AyStarNode *current) { DiagDirection exitdir = TrackdirToExitdir(current->direction); TileIndex tile = current->tile; if (GetTunnelBridgeDirection(tile) == ReverseDiagDir(exitdir)) { /* We just popped out if this tunnel, since were * facing the tunnel exit */ return NPF_TILE_LENGTH * (GetTunnelBridgeLength(current->tile, GetOtherTunnelEnd(current->tile)) + 1); /* @todo: Penalty for tunnels? */ } else { /* We are entering the tunnel, the enter tile is just a * straight track */ return NPF_TILE_LENGTH; } }
virtual void OnPlaceObject(Point pt, TileIndex tile) { switch (this->last_clicked_widget) { case WID_DT_CANAL: // Build canal button VpStartPlaceSizing(tile, (_game_mode == GM_EDITOR) ? VPM_X_AND_Y : VPM_X_OR_Y, DDSP_CREATE_WATER); break; case WID_DT_LOCK: // Build lock button DoCommandP(tile, 0, 0, CMD_BUILD_LOCK | CMD_MSG(STR_ERROR_CAN_T_BUILD_LOCKS), CcBuildDocks); break; case WID_DT_DEMOLISH: // Demolish aka dynamite button PlaceProc_DemolishArea(tile); break; case WID_DT_DEPOT: // Build depot button DoCommandP(tile, _ship_depot_direction, 0, CMD_BUILD_SHIP_DEPOT | CMD_MSG(STR_ERROR_CAN_T_BUILD_SHIP_DEPOT), CcBuildDocks); break; case WID_DT_STATION: { // Build station button uint32 p2 = (uint32)INVALID_STATION << 16; // no station to join /* tile is always the land tile, so need to evaluate _thd.pos */ CommandContainer cmdcont = { tile, _ctrl_pressed, p2, CMD_BUILD_DOCK | CMD_MSG(STR_ERROR_CAN_T_BUILD_DOCK_HERE), CcBuildDocks, "" }; /* Determine the watery part of the dock. */ DiagDirection dir = GetInclinedSlopeDirection(GetTileSlope(tile)); TileIndex tile_to = (dir != INVALID_DIAGDIR ? TileAddByDiagDir(tile, ReverseDiagDir(dir)) : tile); ShowSelectStationIfNeeded(cmdcont, TileArea(tile, tile_to)); break; } case WID_DT_BUOY: // Build buoy button DoCommandP(tile, 0, 0, CMD_BUILD_BUOY | CMD_MSG(STR_ERROR_CAN_T_POSITION_BUOY_HERE), CcBuildDocks); break; case WID_DT_RIVER: // Build river button (in scenario editor) VpStartPlaceSizing(tile, VPM_X_AND_Y, DDSP_CREATE_RIVER); break; case WID_DT_BUILD_AQUEDUCT: // Build aqueduct button DoCommandP(tile, GetOtherAqueductEnd(tile), TRANSPORT_WATER << 15, CMD_BUILD_BRIDGE | CMD_MSG(STR_ERROR_CAN_T_BUILD_AQUEDUCT_HERE), CcBuildBridge); break; default: NOT_REACHED(); } }
static uint NPFReservedTrackCost(AyStarNode *current) { TileIndex tile = current->tile; TrackBits track = TrackToTrackBits(TrackdirToTrack(current->direction)); TrackBits res = GetReservedTrackbits(tile); if (NPFGetFlag(current, NPF_FLAG_3RD_SIGNAL) || NPFGetFlag(current, NPF_FLAG_LAST_SIGNAL_BLOCK) || ((res & track) == TRACK_BIT_NONE && !TracksOverlap(res | track))) return 0; if (IsTileType(tile, MP_TUNNELBRIDGE)) { DiagDirection exitdir = TrackdirToExitdir(current->direction); if (GetTunnelBridgeDirection(tile) == ReverseDiagDir(exitdir)) { return _settings_game.pf.npf.npf_rail_pbs_cross_penalty * (GetTunnelBridgeLength(tile, GetOtherTunnelBridgeEnd(tile)) + 1); } } return _settings_game.pf.npf.npf_rail_pbs_cross_penalty; }
virtual void OnPlacePresize(Point pt, TileIndex tile_from) { TileIndex tile_to = tile_from; if (this->last_clicked_widget == WID_DT_BUILD_AQUEDUCT) { GetOtherAqueductEnd(tile_from, &tile_to); } else { DiagDirection dir = GetInclinedSlopeDirection(GetTileSlope(tile_from)); if (IsValidDiagDirection(dir)) { /* Locks and docks always select the tile "down" the slope. */ tile_to = TileAddByDiagDir(tile_from, ReverseDiagDir(dir)); /* Locks also select the tile "up" the slope. */ if (this->last_clicked_widget == WID_DT_LOCK) tile_from = TileAddByDiagDir(tile_from, dir); } } VpSetPresizeRange(tile_from, tile_to); }
/* static */ bool AIMarine::AreWaterTilesConnected(TileIndex t1, TileIndex t2) { if (!::IsValidTile(t1)) return false; if (!::IsValidTile(t2)) return false; /* Tiles not neighbouring */ if (::DistanceManhattan(t1, t2) != 1) return false; DiagDirection to_other_tile = ::DiagdirBetweenTiles(t1, t2); /* Determine the reachable tracks from the shared edge */ TrackBits gtts1 = ::TrackStatusToTrackBits(::GetTileTrackStatus(t1, TRANSPORT_WATER, 0, to_other_tile)) & ::DiagdirReachesTracks(to_other_tile); if (gtts1 == TRACK_BIT_NONE) return false; to_other_tile = ReverseDiagDir(to_other_tile); TrackBits gtts2 = ::TrackStatusToTrackBits(::GetTileTrackStatus(t2, TRANSPORT_WATER, 0, to_other_tile)) & ::DiagdirReachesTracks(to_other_tile); return gtts2 != TRACK_BIT_NONE; }
/** * Tests if a vehicle can enter a tile. * * @param tile The tile of interest. * @param dir The direction in which the vehicle drives onto a tile. * @param type The transporttype of the vehicle. * @param subtype For TRANSPORT_ROAD the compatible RoadTypes of the vehicle. * @param railtypes For TRANSPORT_RAIL the compatible RailTypes of the vehicle. * @param owner The owner of the vehicle. * @return true iff the vehicle can enter the tile. */ static bool CanEnterTile(TileIndex tile, DiagDirection dir, TransportType type, uint subtype, RailTypes railtypes, Owner owner) { /* Check tunnel entries and bridge ramps */ if (IsTileType(tile, MP_TUNNELBRIDGE) && GetTunnelBridgeDirection(tile) != dir) return false; /* Test ownership */ if (!CanEnterTileOwnerCheck(owner, tile, dir)) return false; /* check correct rail type (mono, maglev, etc) */ if (type == TRANSPORT_RAIL) { RailType rail_type = GetTileRailType(tile); if (!HasBit(railtypes, rail_type)) return false; } /* Depots, standard roadstops and single tram bits can only be entered from one direction */ DiagDirection single_entry = GetTileSingleEntry(tile, type, subtype); if (single_entry != INVALID_DIAGDIR && single_entry != ReverseDiagDir(dir)) return false; return true; }
typename TileIndexT<Tgeneric>::T GetOtherTunnelEnd(typename TileIndexT<Tgeneric>::T tile) { assert(IsTunnelTile(tile)); DiagDirection dir = GetTunnelBridgeDirection(tile); TileIndexDiff delta = TileOffsByDiagDir<Tgeneric>(dir, MapOf(tile)); uint h = TileHeight(tile); if (dir == DIAGDIR_NE || dir == DIAGDIR_NW) { h--; continue_ne_nw: do { tile += delta; } while (TileHeight(tile) != h); } else { continue_se_sw: tile += delta; do { tile += delta; } while (TileHeight(tile) != h); tile -= delta; } if (IsTunnelTile(tile) && GetTunnelBridgeDirection(tile) == ReverseDiagDir(dir)) { } else { /* Handle Chunnels. * Only look for tunnel when hight level changes. * And only at sea level. */ assert(h <= 1); (h == 0) ? h = 1 : h = 0; if (dir == DIAGDIR_NE || dir == DIAGDIR_NW) { goto continue_ne_nw; } else { goto continue_se_sw; } } return tile; }
/** * Rebuild, from scratch, the vehicles and other metadata on this stop. * @param rs the roadstop this entry is part of * @param side the side of the road stop to look at */ void RoadStop::Entry::Rebuild(const RoadStop *rs, int side) { assert(HasBit(rs->status, RSSFB_BASE_ENTRY)); DiagDirection dir = GetRoadStopDir(rs->xy); if (side == -1) side = (rs->east == this); RoadStopEntryRebuilderHelper rserh; rserh.dir = side ? dir : ReverseDiagDir(dir); this->length = 0; TileIndexDiff offset = abs(TileOffsByDiagDir(dir)); for (TileIndex tile = rs->xy; IsDriveThroughRoadStopContinuation(rs->xy, tile); tile += offset) { this->length += TILE_SIZE; FindVehicleOnPos(tile, &rserh, FindVehiclesInRoadStop); } this->occupied = 0; for (RVList::iterator it = rserh.vehicles.begin(); it != rserh.vehicles.end(); it++) { this->occupied += (*it)->gcache.cached_total_length; } }
/** * returns the track to choose on the next tile, or -1 when it's better to * reverse. The tile given is the tile we are about to enter, enterdir is the * direction in which we are entering the tile */ Track OPFShipChooseTrack(const Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool &path_found) { assert(IsValidDiagDirection(enterdir)); TileIndex tile2 = TILE_ADD(tile, -TileOffsByDiagDir(enterdir)); Track track; /* Let's find out how far it would be if we would reverse first */ TrackBits b = TrackStatusToTrackBits(GetTileTrackStatus(tile2, TRANSPORT_WATER, 0)) & DiagdirReachesTracks(ReverseDiagDir(enterdir)) & v->state; uint distr = UINT_MAX; // distance if we reversed if (b != 0) { distr = FindShipTrack(v, tile2, ReverseDiagDir(enterdir), b, tile, &track); if (distr != UINT_MAX) distr++; // penalty for reversing } /* And if we would not reverse? */ uint dist = FindShipTrack(v, tile, enterdir, tracks, 0, &track); /* Due to the way this pathfinder works we cannot determine whether we're lost or not. */ path_found = true; if (dist <= distr) return track; return INVALID_TRACK; // We could better reverse }
/** * Finds the northern end of a bridge starting at a middle tile * @param t the bridge tile to find the bridge ramp for */ TileIndex GetNorthernBridgeEnd(TileIndex t) { return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t)))); }
/** * Called by YAPF to calculate the cost from the origin to the given node. * Calculates only the cost of given node, adds it to the parent node cost * and stores the result into Node::m_cost member */ inline bool PfCalcCost(Node &n, const TrackFollower *tf) { assert(!n.flags_u.flags_s.m_targed_seen); assert(tf->m_new_tile == n.m_key.m_tile); assert((TrackdirToTrackdirBits(n.m_key.m_td) & tf->m_new_td_bits) != TRACKDIR_BIT_NONE); CPerfStart perf_cost(Yapf().m_perf_cost); /* Does the node have some parent node? */ bool has_parent = (n.m_parent != NULL); /* Do we already have a cached segment? */ CachedData &segment = *n.m_segment; bool is_cached_segment = (segment.m_cost >= 0); int parent_cost = has_parent ? n.m_parent->m_cost : 0; /* Each node cost contains 2 or 3 main components: * 1. Transition cost - cost of the move from previous node (tile): * - curve cost (or zero for straight move) * 2. Tile cost: * - base tile cost * - YAPF_TILE_LENGTH for diagonal tiles * - YAPF_TILE_CORNER_LENGTH for non-diagonal tiles * - tile penalties * - tile slope penalty (upward slopes) * - red signal penalty * - level crossing penalty * - speed-limit penalty (bridges) * - station platform penalty * - penalty for reversing in the depot * - etc. * 3. Extra cost (applies to the last node only) * - last red signal penalty * - penalty for too long or too short platform on the destination station */ int transition_cost = 0; int extra_cost = 0; /* Segment: one or more tiles connected by contiguous tracks of the same type. * Each segment cost includes 'Tile cost' for all its tiles (including the first * and last), and the 'Transition cost' between its tiles. The first transition * cost of segment entry (move from the 'parent' node) is not included! */ int segment_entry_cost = 0; int segment_cost = 0; const Train *v = Yapf().GetVehicle(); /* start at n.m_key.m_tile / n.m_key.m_td and walk to the end of segment */ TILE cur(n.m_key.m_tile, n.m_key.m_td); /* the previous tile will be needed for transition cost calculations */ TILE prev = !has_parent ? TILE() : TILE(n.m_parent->GetLastTile(), n.m_parent->GetLastTrackdir()); EndSegmentReasonBits end_segment_reason = ESRB_NONE; TrackFollower tf_local(v, Yapf().GetCompatibleRailTypes(), &Yapf().m_perf_ts_cost); if (!has_parent) { /* We will jump to the middle of the cost calculator assuming that segment cache is not used. */ assert(!is_cached_segment); /* Skip the first transition cost calculation. */ goto no_entry_cost; } for (;;) { /* Transition cost (cost of the move from previous tile) */ transition_cost = Yapf().CurveCost(prev.td, cur.td); transition_cost += Yapf().SwitchCost(prev.tile, cur.tile, TrackdirToExitdir(prev.td)); /* First transition cost counts against segment entry cost, other transitions * inside segment will come to segment cost (and will be cached) */ if (segment_cost == 0) { /* We just entered the loop. First transition cost goes to segment entry cost)*/ segment_entry_cost = transition_cost; transition_cost = 0; /* It is the right time now to look if we can reuse the cached segment cost. */ if (is_cached_segment) { /* Yes, we already know the segment cost. */ segment_cost = segment.m_cost; /* We know also the reason why the segment ends. */ end_segment_reason = segment.m_end_segment_reason; /* We will need also some information about the last signal (if it was red). */ if (segment.m_last_signal_tile != INVALID_TILE) { assert(HasSignalOnTrackdir(segment.m_last_signal_tile, segment.m_last_signal_td)); SignalState sig_state = GetSignalStateByTrackdir(segment.m_last_signal_tile, segment.m_last_signal_td); bool is_red = (sig_state == SIGNAL_STATE_RED); n.flags_u.flags_s.m_last_signal_was_red = is_red; if (is_red) { n.m_last_red_signal_type = GetSignalType(segment.m_last_signal_tile, TrackdirToTrack(segment.m_last_signal_td)); } } /* No further calculation needed. */ cur = TILE(n.GetLastTile(), n.GetLastTrackdir()); break; } } else { /* Other than first transition cost count as the regular segment cost. */ segment_cost += transition_cost; } no_entry_cost: // jump here at the beginning if the node has no parent (it is the first node) /* All other tile costs will be calculated here. */ segment_cost += Yapf().OneTileCost(cur.tile, cur.td); /* If we skipped some tunnel/bridge/station tiles, add their base cost */ segment_cost += YAPF_TILE_LENGTH * tf->m_tiles_skipped; /* Slope cost. */ segment_cost += Yapf().SlopeCost(cur.tile, cur.td); /* Signal cost (routine can modify segment data). */ segment_cost += Yapf().SignalCost(n, cur.tile, cur.td); /* Reserved tiles. */ segment_cost += Yapf().ReservationCost(n, cur.tile, cur.td, tf->m_tiles_skipped); end_segment_reason = segment.m_end_segment_reason; /* Tests for 'potential target' reasons to close the segment. */ if (cur.tile == prev.tile) { /* Penalty for reversing in a depot. */ assert(IsRailDepot(cur.tile)); segment_cost += Yapf().PfGetSettings().rail_depot_reverse_penalty; /* We will end in this pass (depot is possible target) */ end_segment_reason |= ESRB_DEPOT; } else if (cur.tile_type == MP_STATION && IsRailWaypoint(cur.tile)) { if (v->current_order.IsType(OT_GOTO_WAYPOINT) && GetStationIndex(cur.tile) == v->current_order.GetDestination() && !Waypoint::Get(v->current_order.GetDestination())->IsSingleTile()) { /* This waypoint is our destination; maybe this isn't an unreserved * one, so check that and if so see that as the last signal being * red. This way waypoints near stations should work better. */ CFollowTrackRail ft(v); TileIndex t = cur.tile; Trackdir td = cur.td; while (ft.Follow(t, td)) { assert(t != ft.m_new_tile); t = ft.m_new_tile; if (KillFirstBit(ft.m_new_td_bits) != TRACKDIR_BIT_NONE) { /* We encountered a junction; it's going to be too complex to * handle this perfectly, so just bail out. There is no simple * free path, so try the other possibilities. */ td = INVALID_TRACKDIR; break; } td = RemoveFirstTrackdir(&ft.m_new_td_bits); /* If this is a safe waiting position we're done searching for it */ if (IsSafeWaitingPosition(v, t, td, true, _settings_game.pf.forbid_90_deg)) break; } /* In the case this platform is (possibly) occupied we add penalty so the * other platforms of this waypoint are evaluated as well, i.e. we assume * that there is a red signal in the waypoint when it's occupied. */ if (td == INVALID_TRACKDIR || !IsSafeWaitingPosition(v, t, td, true, _settings_game.pf.forbid_90_deg) || !IsWaitingPositionFree(v, t, td, _settings_game.pf.forbid_90_deg)) { extra_cost += Yapf().PfGetSettings().rail_lastred_penalty; } } /* Waypoint is also a good reason to finish. */ end_segment_reason |= ESRB_WAYPOINT; } else if (tf->m_is_station) { /* Station penalties. */ uint platform_length = tf->m_tiles_skipped + 1; /* We don't know yet if the station is our target or not. Act like * if it is pass-through station (not our destination). */ segment_cost += Yapf().PfGetSettings().rail_station_penalty * platform_length; /* We will end in this pass (station is possible target) */ end_segment_reason |= ESRB_STATION; } else if (TrackFollower::DoTrackMasking() && cur.tile_type == MP_RAILWAY) { /* Searching for a safe tile? */ if (HasSignalOnTrackdir(cur.tile, cur.td) && !IsPbsSignal(GetSignalType(cur.tile, TrackdirToTrack(cur.td)))) { end_segment_reason |= ESRB_SAFE_TILE; } } /* Apply min/max speed penalties only when inside the look-ahead radius. Otherwise * it would cause desync in MP. */ if (n.m_num_signals_passed < m_sig_look_ahead_costs.Size()) { int min_speed = 0; int max_speed = tf->GetSpeedLimit(&min_speed); int max_veh_speed = v->GetDisplayMaxSpeed(); if (max_speed < max_veh_speed) { extra_cost += YAPF_TILE_LENGTH * (max_veh_speed - max_speed) * (4 + tf->m_tiles_skipped) / max_veh_speed; } if (min_speed > max_veh_speed) { extra_cost += YAPF_TILE_LENGTH * (min_speed - max_veh_speed); } } /* Finish if we already exceeded the maximum path cost (i.e. when * searching for the nearest depot). */ if (m_max_cost > 0 && (parent_cost + segment_entry_cost + segment_cost) > m_max_cost) { end_segment_reason |= ESRB_PATH_TOO_LONG; } /* Move to the next tile/trackdir. */ tf = &tf_local; tf_local.Init(v, Yapf().GetCompatibleRailTypes(), &Yapf().m_perf_ts_cost); if (!tf_local.Follow(cur.tile, cur.td)) { assert(tf_local.m_err != TrackFollower::EC_NONE); /* Can't move to the next tile (EOL?). */ if (tf_local.m_err == TrackFollower::EC_RAIL_TYPE) { end_segment_reason |= ESRB_RAIL_TYPE; } else { end_segment_reason |= ESRB_DEAD_END; } if (TrackFollower::DoTrackMasking() && !HasOnewaySignalBlockingTrackdir(cur.tile, cur.td)) { end_segment_reason |= ESRB_SAFE_TILE; } break; } /* Check if the next tile is not a choice. */ if (KillFirstBit(tf_local.m_new_td_bits) != TRACKDIR_BIT_NONE) { /* More than one segment will follow. Close this one. */ end_segment_reason |= ESRB_CHOICE_FOLLOWS; break; } /* Gather the next tile/trackdir/tile_type/rail_type. */ TILE next(tf_local.m_new_tile, (Trackdir)FindFirstBit2x64(tf_local.m_new_td_bits)); if (TrackFollower::DoTrackMasking() && IsTileType(next.tile, MP_RAILWAY)) { if (HasSignalOnTrackdir(next.tile, next.td) && IsPbsSignal(GetSignalType(next.tile, TrackdirToTrack(next.td)))) { /* Possible safe tile. */ end_segment_reason |= ESRB_SAFE_TILE; } else if (HasSignalOnTrackdir(next.tile, ReverseTrackdir(next.td)) && GetSignalType(next.tile, TrackdirToTrack(next.td)) == SIGTYPE_PBS_ONEWAY) { /* Possible safe tile, but not so good as it's the back of a signal... */ end_segment_reason |= ESRB_SAFE_TILE | ESRB_DEAD_END; extra_cost += Yapf().PfGetSettings().rail_lastred_exit_penalty; } } /* Check the next tile for the rail type. */ if (next.rail_type != cur.rail_type) { /* Segment must consist from the same rail_type tiles. */ end_segment_reason |= ESRB_RAIL_TYPE; break; } /* Avoid infinite looping. */ if (next.tile == n.m_key.m_tile && next.td == n.m_key.m_td) { end_segment_reason |= ESRB_INFINITE_LOOP; break; } if (segment_cost > s_max_segment_cost) { /* Potentially in the infinite loop (or only very long segment?). We should * not force it to finish prematurely unless we are on a regular tile. */ if (IsTileType(tf->m_new_tile, MP_RAILWAY)) { end_segment_reason |= ESRB_SEGMENT_TOO_LONG; break; } } /* Any other reason bit set? */ if (end_segment_reason != ESRB_NONE) { break; } /* For the next loop set new prev and cur tile info. */ prev = cur; cur = next; } // for (;;) bool target_seen = false; if ((end_segment_reason & ESRB_POSSIBLE_TARGET) != ESRB_NONE) { /* Depot, station or waypoint. */ if (Yapf().PfDetectDestination(cur.tile, cur.td)) { /* Destination found. */ target_seen = true; } } /* Update the segment if needed. */ if (!is_cached_segment) { /* Write back the segment information so it can be reused the next time. */ segment.m_cost = segment_cost; segment.m_end_segment_reason = end_segment_reason & ESRB_CACHED_MASK; /* Save end of segment back to the node. */ n.SetLastTileTrackdir(cur.tile, cur.td); } /* Do we have an excuse why not to continue pathfinding in this direction? */ if (!target_seen && (end_segment_reason & ESRB_ABORT_PF_MASK) != ESRB_NONE) { /* Reason to not continue. Stop this PF branch. */ return false; } /* Special costs for the case we have reached our target. */ if (target_seen) { n.flags_u.flags_s.m_targed_seen = true; /* Last-red and last-red-exit penalties. */ if (n.flags_u.flags_s.m_last_signal_was_red) { if (n.m_last_red_signal_type == SIGTYPE_EXIT) { /* last signal was red pre-signal-exit */ extra_cost += Yapf().PfGetSettings().rail_lastred_exit_penalty; } else if (!IsPbsSignal(n.m_last_red_signal_type)) { /* Last signal was red, but not exit or path signal. */ extra_cost += Yapf().PfGetSettings().rail_lastred_penalty; } } /* Station platform-length penalty. */ if ((end_segment_reason & ESRB_STATION) != ESRB_NONE) { const BaseStation *st = BaseStation::GetByTile(n.GetLastTile()); assert(st != NULL); uint platform_length = st->GetPlatformLength(n.GetLastTile(), ReverseDiagDir(TrackdirToExitdir(n.GetLastTrackdir()))); /* Reduce the extra cost caused by passing-station penalty (each station receives it in the segment cost). */ extra_cost -= Yapf().PfGetSettings().rail_station_penalty * platform_length; /* Add penalty for the inappropriate platform length. */ extra_cost += PlatformLengthPenalty(platform_length); } } /* total node cost */ n.m_cost = parent_cost + segment_entry_cost + segment_cost + extra_cost; return true; }
/** * Called by YAPF to calculate the cost from the origin to the given node. * Calculates only the cost of given node, adds it to the parent node cost * and stores the result into Node::m_cost member */ inline bool PfCalcCost(Node& n, const TrackFollower *tf) { int segment_cost = 0; uint tiles = 0; /* start at n.m_key.m_tile / n.m_key.m_td and walk to the end of segment */ TileIndex tile = n.m_key.m_tile; Trackdir trackdir = n.m_key.m_td; for (;;) { /* base tile cost depending on distance between edges */ segment_cost += Yapf().OneTileCost(tile, trackdir); const RoadVehicle *v = Yapf().GetVehicle(); /* we have reached the vehicle's destination - segment should end here to avoid target skipping */ if (Yapf().PfDetectDestinationTile(tile, trackdir)) break; /* stop if we have just entered the depot */ if (IsRoadDepotTile(tile) && trackdir == DiagDirToDiagTrackdir(ReverseDiagDir(GetRoadDepotDirection(tile)))) { /* next time we will reverse and leave the depot */ break; } /* if there are no reachable trackdirs on new tile, we have end of road */ TrackFollower F(Yapf().GetVehicle()); if (!F.Follow(tile, trackdir)) break; /* if there are more trackdirs available & reachable, we are at the end of segment */ if (KillFirstBit(F.m_new_td_bits) != TRACKDIR_BIT_NONE) break; Trackdir new_td = (Trackdir)FindFirstBit2x64(F.m_new_td_bits); /* stop if RV is on simple loop with no junctions */ if (F.m_new_tile == n.m_key.m_tile && new_td == n.m_key.m_td) return false; /* if we skipped some tunnel tiles, add their cost */ segment_cost += F.m_tiles_skipped * YAPF_TILE_LENGTH; tiles += F.m_tiles_skipped + 1; /* add hilly terrain penalty */ segment_cost += Yapf().SlopeCost(tile, F.m_new_tile, trackdir); /* add min/max speed penalties */ int min_speed = 0; int max_veh_speed = v->GetDisplayMaxSpeed(); int max_speed = F.GetSpeedLimit(&min_speed); if (max_speed < max_veh_speed) segment_cost += 1 * (max_veh_speed - max_speed); if (min_speed > max_veh_speed) segment_cost += 10 * (min_speed - max_veh_speed); /* move to the next tile */ tile = F.m_new_tile; trackdir = new_td; if (tiles > MAX_MAP_SIZE) break; } /* save end of segment back to the node */ n.m_segment_last_tile = tile; n.m_segment_last_td = trackdir; /* save also tile cost */ int parent_cost = (n.m_parent != NULL) ? n.m_parent->m_cost : 0; n.m_cost = parent_cost + segment_cost; return true; }
/** * Search signal block * * @param owner owner whose signals we are updating * @return SigFlags */ static SigFlags ExploreSegment(Owner owner) { SigFlags flags = SF_NONE; TileIndex tile; DiagDirection enterdir; while (_tbdset.Get(&tile, &enterdir)) { TileIndex oldtile = tile; // tile we are leaving DiagDirection exitdir = enterdir == INVALID_DIAGDIR ? INVALID_DIAGDIR : ReverseDiagDir(enterdir); // expected new exit direction (for straight line) switch (GetTileType(tile)) { case MP_RAILWAY: { if (GetTileOwner(tile) != owner) continue; // do not propagate signals on others' tiles (remove for tracksharing) if (IsRailDepot(tile)) { if (enterdir == INVALID_DIAGDIR) { // from 'inside' - train just entered or left the depot if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN; exitdir = GetRailDepotDirection(tile); tile += TileOffsByDiagDir(exitdir); enterdir = ReverseDiagDir(exitdir); break; } else if (enterdir == GetRailDepotDirection(tile)) { // entered a depot if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN; continue; } else { continue; } } TrackBits tracks = GetTrackBits(tile); // trackbits of tile TrackBits tracks_masked = (TrackBits)(tracks & _enterdir_to_trackbits[enterdir]); // only incidating trackbits if (tracks == TRACK_BIT_HORZ || tracks == TRACK_BIT_VERT) { // there is exactly one incidating track, no need to check tracks = tracks_masked; /* If no train detected yet, and there is not no train -> there is a train -> set the flag */ if (!(flags & SF_TRAIN) && EnsureNoTrainOnTrackBits(tile, tracks).Failed()) flags |= SF_TRAIN; } else { if (tracks_masked == TRACK_BIT_NONE) continue; // no incidating track if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN; } if (HasSignals(tile)) { // there is exactly one track - not zero, because there is exit from this tile Track track = TrackBitsToTrack(tracks_masked); // mask TRACK_BIT_X and Y too if (HasSignalOnTrack(tile, track)) { // now check whole track, not trackdir SignalType sig = GetSignalType(tile, track); Trackdir trackdir = (Trackdir)FindFirstBit((tracks * 0x101) & _enterdir_to_trackdirbits[enterdir]); Trackdir reversedir = ReverseTrackdir(trackdir); /* add (tile, reversetrackdir) to 'to-be-updated' set when there is * ANY conventional signal in REVERSE direction * (if it is a presignal EXIT and it changes, it will be added to 'to-be-done' set later) */ if (HasSignalOnTrackdir(tile, reversedir)) { if (IsPbsSignal(sig)) { flags |= SF_PBS; } else if (!_tbuset.Add(tile, reversedir)) { return flags | SF_FULL; } } if (HasSignalOnTrackdir(tile, trackdir) && !IsOnewaySignal(tile, track)) flags |= SF_PBS; /* if it is a presignal EXIT in OUR direction and we haven't found 2 green exits yes, do special check */ if (!(flags & SF_GREEN2) && IsPresignalExit(tile, track) && HasSignalOnTrackdir(tile, trackdir)) { // found presignal exit if (flags & SF_EXIT) flags |= SF_EXIT2; // found two (or more) exits flags |= SF_EXIT; // found at least one exit - allow for compiler optimizations if (GetSignalStateByTrackdir(tile, trackdir) == SIGNAL_STATE_GREEN) { // found green presignal exit if (flags & SF_GREEN) flags |= SF_GREEN2; flags |= SF_GREEN; } } continue; } } for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) { // test all possible exit directions if (dir != enterdir && (tracks & _enterdir_to_trackbits[dir])) { // any track incidating? TileIndex newtile = tile + TileOffsByDiagDir(dir); // new tile to check DiagDirection newdir = ReverseDiagDir(dir); // direction we are entering from if (!MaybeAddToTodoSet(newtile, newdir, tile, dir)) return flags | SF_FULL; } } continue; // continue the while() loop } case MP_STATION: if (!HasStationRail(tile)) continue; if (GetTileOwner(tile) != owner) continue; if (DiagDirToAxis(enterdir) != GetRailStationAxis(tile)) continue; // different axis if (IsStationTileBlocked(tile)) continue; // 'eye-candy' station tile if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN; tile += TileOffsByDiagDir(exitdir); break; case MP_ROAD: if (!IsLevelCrossing(tile)) continue; if (GetTileOwner(tile) != owner) continue; if (DiagDirToAxis(enterdir) == GetCrossingRoadAxis(tile)) continue; // different axis if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN; tile += TileOffsByDiagDir(exitdir); break; case MP_TUNNELBRIDGE: { if (GetTileOwner(tile) != owner) continue; if (GetTunnelBridgeTransportType(tile) != TRANSPORT_RAIL) continue; DiagDirection dir = GetTunnelBridgeDirection(tile); if (enterdir == INVALID_DIAGDIR) { // incoming from the wormhole if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN; enterdir = dir; exitdir = ReverseDiagDir(dir); tile += TileOffsByDiagDir(exitdir); // just skip to next tile } else { // NOT incoming from the wormhole! if (ReverseDiagDir(enterdir) != dir) continue; if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN; tile = GetOtherTunnelBridgeEnd(tile); // just skip to exit tile enterdir = INVALID_DIAGDIR; exitdir = INVALID_DIAGDIR; } } break; default: continue; // continue the while() loop } if (!MaybeAddToTodoSet(tile, enterdir, oldtile, exitdir)) return flags | SF_FULL; } return flags; }
/** * Updates blocks in _globset buffer * * @param owner company whose signals we are updating * @return state of the first block from _globset * @pre Company::IsValidID(owner) */ static SigSegState UpdateSignalsInBuffer(Owner owner) { assert(Company::IsValidID(owner)); bool first = true; // first block? SigSegState state = SIGSEG_FREE; // value to return TileIndex tile; DiagDirection dir; while (_globset.Get(&tile, &dir)) { assert(_tbuset.IsEmpty()); assert(_tbdset.IsEmpty()); /* After updating signal, data stored are always MP_RAILWAY with signals. * Other situations happen when data are from outside functions - * modification of railbits (including both rail building and removal), * train entering/leaving block, train leaving depot... */ switch (GetTileType(tile)) { case MP_TUNNELBRIDGE: /* 'optimization assert' - do not try to update signals when it is not needed */ assert(GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL); assert(dir == INVALID_DIAGDIR || dir == ReverseDiagDir(GetTunnelBridgeDirection(tile))); _tbdset.Add(tile, INVALID_DIAGDIR); // we can safely start from wormhole centre _tbdset.Add(GetOtherTunnelBridgeEnd(tile), INVALID_DIAGDIR); break; case MP_RAILWAY: if (IsRailDepot(tile)) { /* 'optimization assert' do not try to update signals in other cases */ assert(dir == INVALID_DIAGDIR || dir == GetRailDepotDirection(tile)); _tbdset.Add(tile, INVALID_DIAGDIR); // start from depot inside break; } /* FALL THROUGH */ case MP_STATION: case MP_ROAD: if ((TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_RAIL, 0)) & _enterdir_to_trackbits[dir]) != TRACK_BIT_NONE) { /* only add to set when there is some 'interesting' track */ _tbdset.Add(tile, dir); _tbdset.Add(tile + TileOffsByDiagDir(dir), ReverseDiagDir(dir)); break; } /* FALL THROUGH */ default: /* jump to next tile */ tile = tile + TileOffsByDiagDir(dir); dir = ReverseDiagDir(dir); if ((TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_RAIL, 0)) & _enterdir_to_trackbits[dir]) != TRACK_BIT_NONE) { _tbdset.Add(tile, dir); break; } /* happens when removing a rail that wasn't connected at one or both sides */ continue; // continue the while() loop } assert(!_tbdset.Overflowed()); // it really shouldn't overflow by these one or two items assert(!_tbdset.IsEmpty()); // it wouldn't hurt anyone, but shouldn't happen too SigFlags flags = ExploreSegment(owner); if (first) { first = false; /* SIGSEG_FREE is set by default */ if (flags & SF_PBS) { state = SIGSEG_PBS; } else if ((flags & SF_TRAIN) || ((flags & SF_EXIT) && !(flags & SF_GREEN)) || (flags & SF_FULL)) { state = SIGSEG_FULL; } } /* do not do anything when some buffer was full */ if (flags & SF_FULL) { ResetSets(); // free all sets break; } UpdateSignalsAroundSegment(flags); } return state; }