/* $Id$ */ /* * This file is part of OpenTTD. * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. */ /** @file road_map.h Map accessors for roads. */ #ifndef ROAD_MAP_H #define ROAD_MAP_H #include "track_func.h" #include "rail_type.h" #include "town_type.h" #include "road_func.h" #include "tile_map.h" enum RoadTileType { ROAD_TILE_NORMAL, ROAD_TILE_CROSSING, ROAD_TILE_DEPOT }; static inline RoadTileType GetRoadTileType(TileIndex t) { assert(IsTileType(t, MP_ROAD)); return (RoadTileType)GB(_m[t].m5, 6, 2); } static inline bool IsNormalRoad(TileIndex t) { return GetRoadTileType(t) == ROAD_TILE_NORMAL; } static inline bool IsNormalRoadTile(TileIndex t) { return IsTileType(t, MP_ROAD) && IsNormalRoad(t); } static inline bool IsLevelCrossing(TileIndex t) { return GetRoadTileType(t) == ROAD_TILE_CROSSING; } static inline bool IsLevelCrossingTile(TileIndex t) { return IsTileType(t, MP_ROAD) && IsLevelCrossing(t); } static inline bool IsRoadDepot(TileIndex t) { return GetRoadTileType(t) == ROAD_TILE_DEPOT; } static inline bool IsRoadDepotTile(TileIndex t) { return IsTileType(t, MP_ROAD) && IsRoadDepot(t); } static inline RoadBits GetRoadBits(TileIndex t, RoadType rt) { assert(IsNormalRoad(t)); switch (rt) { default: NOT_REACHED(); case ROADTYPE_ROAD: return (RoadBits)GB(_m[t].m5, 0, 4); case ROADTYPE_TRAM: return (RoadBits)GB(_m[t].m3, 0, 4); } } /** * Get all RoadBits set on a tile except from the given RoadType * * @param t The tile from which we want to get the RoadBits * @param rt The RoadType which we exclude from the querry * @return all set RoadBits of the tile which are not from the given RoadType */ static inline RoadBits GetOtherRoadBits(TileIndex t, RoadType rt) { return GetRoadBits(t, rt == ROADTYPE_ROAD ? ROADTYPE_TRAM : ROADTYPE_ROAD); } /** * Get all set RoadBits on the given tile * * @param tile The tile from which we want to get the RoadBits * @return all set RoadBits of the tile */ static inline RoadBits GetAllRoadBits(TileIndex tile) { return GetRoadBits(tile, ROADTYPE_ROAD) | GetRoadBits(tile, ROADTYPE_TRAM); } static inline void SetRoadBits(TileIndex t, RoadBits r, RoadType rt) { assert(IsNormalRoad(t)); // XXX incomplete switch (rt) { default: NOT_REACHED(); case ROADTYPE_ROAD: SB(_m[t].m5, 0, 4, r); break; case ROADTYPE_TRAM: SB(_m[t].m3, 0, 4, r); break; } } static inline RoadTypes GetRoadTypes(TileIndex t) { return (RoadTypes)GB(_me[t].m7, 6, 2); } static inline void SetRoadTypes(TileIndex t, RoadTypes rt) { assert(IsTileType(t, MP_ROAD) || IsTileType(t, MP_STATION) || IsTileType(t, MP_TUNNELBRIDGE)); SB(_me[t].m7, 6, 2, rt); } static inline bool HasTileRoadType(TileIndex t, RoadType rt) { return HasBit(GetRoadTypes(t), rt); } static inline Owner GetRoadOwner(TileIndex t, RoadType rt) { switch (rt) { default: NOT_REACHED(); case ROADTYPE_ROAD: return (Owner)GB(IsNormalRoadTile(t) ? _m[t].m1 : _me[t].m7, 0, 5); case ROADTYPE_TRAM: { /* Trams don't need OWNER_TOWN, and remapping OWNER_NONE * to OWNER_TOWN makes it use one bit less */ Owner o = (Owner)GB(_m[t].m3, 4, 4); return o == OWNER_TOWN ? OWNER_NONE : o; } } } static inline void SetRoadOwner(TileIndex t, RoadType rt, Owner o) { switch (rt) { default: NOT_REACHED(); case ROADTYPE_ROAD: SB(IsNormalRoadTile(t) ? _m[t].m1 : _me[t].m7, 0, 5, o); break; case ROADTYPE_TRAM: SB(_m[t].m3, 4, 4, o == OWNER_NONE ? OWNER_TOWN : o); break; } } static inline bool IsRoadOwner(TileIndex t, RoadType rt, Owner o) { assert(HasTileRoadType(t, rt)); return (GetRoadOwner(t, rt) == o); } /** Checks if given tile has town owned road * @param t tile to check * @return true iff tile has road and the road is owned by a town * @pre IsTileType(t, MP_ROAD) */ static inline bool HasTownOwnedRoad(TileIndex t) { return HasTileRoadType(t, ROADTYPE_ROAD) && IsRoadOwner(t, ROADTYPE_ROAD, OWNER_TOWN); } /** Which directions are disallowed ? */ enum DisallowedRoadDirections { DRD_NONE, ///< None of the directions are disallowed DRD_SOUTHBOUND, ///< All southbound traffic is disallowed DRD_NORTHBOUND, ///< All northbound traffic is disallowed DRD_BOTH, ///< All directions are disallowed DRD_END }; DECLARE_ENUM_AS_BIT_SET(DisallowedRoadDirections); /** * Gets the disallowed directions * @param t the tile to get the directions from * @return the disallowed directions */ static inline DisallowedRoadDirections GetDisallowedRoadDirections(TileIndex t) { assert(IsNormalRoad(t)); return (DisallowedRoadDirections)GB(_m[t].m5, 4, 2); } /** * Sets the disallowed directions * @param t the tile to set the directions for * @param drd the disallowed directions */ static inline void SetDisallowedRoadDirections(TileIndex t, DisallowedRoadDirections drd) { assert(IsNormalRoad(t)); assert(drd < DRD_END); SB(_m[t].m5, 4, 2, drd); } static inline Axis GetCrossingRoadAxis(TileIndex t) { assert(IsLevelCrossing(t)); return (Axis)GB(_m[t].m5, 0, 1); } static inline Axis GetCrossingRailAxis(TileIndex t) { assert(IsLevelCrossing(t)); return OtherAxis((Axis)GetCrossingRoadAxis(t)); } static inline RoadBits GetCrossingRoadBits(TileIndex tile) { return GetCrossingRoadAxis(tile) == AXIS_X ? ROAD_X : ROAD_Y; } static inline Track GetCrossingRailTrack(TileIndex tile) { return AxisToTrack(GetCrossingRailAxis(tile)); } static inline TrackBits GetCrossingRailBits(TileIndex tile) { return AxisToTrackBits(GetCrossingRailAxis(tile)); } /** * Get the reservation state of the rail crossing * @pre IsLevelCrossingTile(t) * @param t the crossing tile * @return reservation state */ static inline bool HasCrossingReservation(TileIndex t) { assert(IsLevelCrossingTile(t)); return HasBit(_m[t].m5, 4); } /** * Set the reservation state of the rail crossing * @note Works for both waypoints and rail depots * @pre IsLevelCrossingTile(t) * @param t the crossing tile * @param b the reservation state */ static inline void SetCrossingReservation(TileIndex t, bool b) { assert(IsLevelCrossingTile(t)); SB(_m[t].m5, 4, 1, b ? 1 : 0); } /** * Get the reserved track bits for a rail crossing * @pre IsLevelCrossingTile(t) * @param t the tile * @return reserved track bits */ static inline TrackBits GetCrossingReservationTrackBits(TileIndex t) { return HasCrossingReservation(t) ? GetCrossingRailBits(t) : TRACK_BIT_NONE; } static inline bool IsCrossingBarred(TileIndex t) { assert(IsLevelCrossing(t)); return HasBit(_m[t].m5, 5); } static inline void SetCrossingBarred(TileIndex t, bool barred) { assert(IsLevelCrossing(t)); SB(_m[t].m5, 5, 1, barred ? 1 : 0); } static inline void UnbarCrossing(TileIndex t) { SetCrossingBarred(t, false); } static inline void BarCrossing(TileIndex t) { SetCrossingBarred(t, true); } #define IsOnDesert IsOnSnow static inline bool IsOnSnow(TileIndex t) { return HasBit(_me[t].m7, 5); } #define ToggleDesert ToggleSnow static inline void ToggleSnow(TileIndex t) { ToggleBit(_me[t].m7, 5); } enum Roadside { ROADSIDE_BARREN = 0, ROADSIDE_GRASS = 1, ROADSIDE_PAVED = 2, ROADSIDE_STREET_LIGHTS = 3, ROADSIDE_TREES = 5, ROADSIDE_GRASS_ROAD_WORKS = 6, ROADSIDE_PAVED_ROAD_WORKS = 7 }; static inline Roadside GetRoadside(TileIndex tile) { return (Roadside)GB(_m[tile].m6, 3, 3); } static inline void SetRoadside(TileIndex tile, Roadside s) { SB(_m[tile].m6, 3, 3, s); } static inline bool HasRoadWorks(TileIndex t) { return GetRoadside(t) >= ROADSIDE_GRASS_ROAD_WORKS; } static inline bool IncreaseRoadWorksCounter(TileIndex t) { AB(_me[t].m7, 0, 4, 1); return GB(_me[t].m7, 0, 4) == 15; } static inline void StartRoadWorks(TileIndex t) { assert(!HasRoadWorks(t)); /* Remove any trees or lamps in case or roadwork */ switch (GetRoadside(t)) { case ROADSIDE_BARREN: case ROADSIDE_GRASS: SetRoadside(t, ROADSIDE_GRASS_ROAD_WORKS); break; default: SetRoadside(t, ROADSIDE_PAVED_ROAD_WORKS); break; } } static inline void TerminateRoadWorks(TileIndex t) { assert(HasRoadWorks(t)); SetRoadside(t, (Roadside)(GetRoadside(t) - ROADSIDE_GRASS_ROAD_WORKS + ROADSIDE_GRASS)); /* Stop the counter */ SB(_me[t].m7, 0, 4, 0); } static inline DiagDirection GetRoadDepotDirection(TileIndex t) { assert(IsRoadDepot(t)); return (DiagDirection)GB(_m[t].m5, 0, 2); } /** * Returns the RoadBits on an arbitrary tile * Special behaviour: * - road depots: entrance is treated as road piece * - road tunnels: entrance is treated as road piece * - bridge ramps: start of the ramp is treated as road piece * - bridge middle parts: bridge itself is ignored * * If straight_tunnel_bridge_entrance is set a ROAD_X or ROAD_Y * for bridge ramps and tunnel entrances is returned depending * on the orientation of the tunnel or bridge. * @param tile the tile to get the road bits for * @param rt the road type to get the road bits form * @param stbe whether to return straight road bits for tunnels/bridges. * @return the road bits of the given tile */ RoadBits GetAnyRoadBits(TileIndex tile, RoadType rt, bool straight_tunnel_bridge_entrance = false); /** * Return if the tile is a valid tile for a crossing. * * @note function is overloaded * @param tile the curent tile * @param ax the axis of the road over the rail * @return true if it is a valid tile */ bool IsPossibleCrossing(const TileIndex tile, Axis ax); static inline void MakeRoadNormal(TileIndex t, RoadBits bits, RoadTypes rot, TownID town, Owner road, Owner tram) { SetTileType(t, MP_ROAD); SetTileOwner(t, road); _m[t].m2 = town; _m[t].m3 = (HasBit(rot, ROADTYPE_TRAM) ? bits : 0); _m[t].m4 = 0; _m[t].m5 = (HasBit(rot, ROADTYPE_ROAD) ? bits : 0) | ROAD_TILE_NORMAL << 6; SB(_m[t].m6, 2, 4, 0); _me[t].m7 = rot << 6; SetRoadOwner(t, ROADTYPE_TRAM, tram); } static inline void MakeRoadCrossing(TileIndex t, Owner road, Owner tram, Owner rail, Axis roaddir, RailType rat, RoadTypes rot, uint town) { SetTileType(t, MP_ROAD); SetTileOwner(t, rail); _m[t].m2 = town; _m[t].m3 = rat; _m[t].m4 = 0; _m[t].m5 = ROAD_TILE_CROSSING << 6 | roaddir; SB(_m[t].m6, 2, 4, 0); _me[t].m7 = rot << 6 | road; SetRoadOwner(t, ROADTYPE_TRAM, tram); } static inline void MakeRoadDepot(TileIndex t, Owner owner, DiagDirection dir, RoadType rt, TownID town) { SetTileType(t, MP_ROAD); SetTileOwner(t, owner); _m[t].m2 = town; _m[t].m3 = 0; _m[t].m4 = 0; _m[t].m5 = ROAD_TILE_DEPOT << 6 | dir; SB(_m[t].m6, 2, 4, 0); _me[t].m7 = RoadTypeToRoadTypes(rt) << 6 | owner; SetRoadOwner(t, ROADTYPE_TRAM, owner); } #endif /* ROAD_MAP_H */