/* $Id$ */ /* * 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 tunnel_map.h Map accessors for tunnels. */ #ifndef TUNNEL_MAP_H #define TUNNEL_MAP_H #include "road_map.h" /** * Is this a tunnel (entrance)? * @param t the tile that might be a tunnel * @pre IsTileType(t, MP_TUNNELBRIDGE) * @return true if and only if this tile is a tunnel (entrance) */ static inline bool IsTunnel(TileIndex t) { assert(IsTileType(t, MP_TUNNELBRIDGE)); return !HasBit(_m[t].m5, 7); } /** * Is this a tunnel (entrance)? * @param t the tile that might be a tunnel * @return true if and only if this tile is a tunnel (entrance) */ static inline bool IsTunnelTile(TileIndex t) { return IsTileType(t, MP_TUNNELBRIDGE) && IsTunnel(t); } TileIndex GetOtherTunnelEnd(TileIndex); bool IsTunnelInWay(TileIndex, int z); bool IsTunnelInWayDir(TileIndex tile, int z, DiagDirection dir); /** * Makes a road tunnel entrance * @param t the entrance of the tunnel * @param o the owner of the entrance * @param d the direction facing out of the tunnel * @param r the road type used in the tunnel */ static inline void MakeRoadTunnel(TileIndex t, Owner o, DiagDirection d, RoadTypes r) { SetTileType(t, MP_TUNNELBRIDGE); SetTileOwner(t, o); _m[t].m2 = 0; _m[t].m3 = 0; _m[t].m4 = 0; _m[t].m5 = TRANSPORT_ROAD << 2 | d; SB(_m[t].m6, 2, 4, 0); _me[t].m7 = 0; SetRoadOwner(t, ROADTYPE_ROAD, o); if (o != OWNER_TOWN) SetRoadOwner(t, ROADTYPE_TRAM, o); SetRoadTypes(t, r); } /** * Makes a rail tunnel entrance * @param t the entrance of the tunnel * @param o the owner of the entrance * @param d the direction facing out of the tunnel * @param r the rail type used in the tunnel */ static inline void MakeRailTunnel(TileIndex t, Owner o, DiagDirection d, RailType r) { SetTileType(t, MP_TUNNELBRIDGE); SetTileOwner(t, o); _m[t].m2 = 0; _m[t].m3 = r; _m[t].m4 = 0; _m[t].m5 = TRANSPORT_RAIL << 2 | d; SB(_m[t].m6, 2, 4, 0); _me[t].m7 = 0; } #endif /* TUNNEL_MAP_H */