src/tunnel_map.h

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file tunnel_map.h Map accessors for tunnels. */
   9
  10 #ifndef TUNNEL_MAP_H
  11 #define TUNNEL_MAP_H
  12
  13 #include "road_map.h"
  14
  15
  16 /**
  17  * Is this a tunnel (entrance)?
  18  * @param t the tile that might be a tunnel
  19  * @pre IsTileType(t, MP_TUNNELBRIDGE)
  20  * @return true if and only if this tile is a tunnel (entrance)
  21  */
  22 static inline bool IsTunnel(TileIndex t)
  23 {
  24         assert(IsTileType(t, MP_TUNNELBRIDGE));
  25         return !HasBit(_m[t].m5, 7);
  26 }
  27
  28 /**
  29  * Is this a tunnel (entrance)?
  30  * @param t the tile that might be a tunnel
  31  * @return true if and only if this tile is a tunnel (entrance)
  32  */
  33 static inline bool IsTunnelTile(TileIndex t)
  34 {
  35         return IsTileType(t, MP_TUNNELBRIDGE) && IsTunnel(t);
  36 }
  37
  38 TileIndex GetOtherTunnelEnd(TileIndex);
  39 bool IsTunnelInWay(TileIndex, int z);
  40 bool IsTunnelInWayDir(TileIndex tile, int z, DiagDirection dir);
  41
  42 /**
  43  * Makes a road tunnel entrance
  44  * @param t the entrance of the tunnel
  45  * @param o the owner of the entrance
  46  * @param d the direction facing out of the tunnel
  47  * @param r the road type used in the tunnel
  48  */
  49 static inline void MakeRoadTunnel(TileIndex t, Owner o, DiagDirection d, RoadType road_rt, RoadType tram_rt)
  50 {
  51         SetTileType(t, MP_TUNNELBRIDGE);
  52         SetTileOwner(t, o);
  53         _m[t].m2 = 0;
  54         _m[t].m3 = 0;
  55         _m[t].m4 = 0;
  56         _m[t].m5 = TRANSPORT_ROAD << 2 | d;
  57         SB(_me[t].m6, 2, 4, 0);
  58         _me[t].m7 = 0;
  59         _me[t].m8 = 0;
  60         SetRoadOwner(t, RTT_ROAD, o);
  61         if (o != OWNER_TOWN) SetRoadOwner(t, RTT_TRAM, o);
  62         SetRoadTypes(t, road_rt, tram_rt);
  63 }
  64
  65 /**
  66  * Makes a rail tunnel entrance
  67  * @param t the entrance of the tunnel
  68  * @param o the owner of the entrance
  69  * @param d the direction facing out of the tunnel
  70  * @param r the rail type used in the tunnel
  71  */
  72 static inline void MakeRailTunnel(TileIndex t, Owner o, DiagDirection d, RailType r)
  73 {
  74         SetTileType(t, MP_TUNNELBRIDGE);
  75         SetTileOwner(t, o);
  76         _m[t].m2 = 0;
  77         _m[t].m3 = 0;
  78         _m[t].m4 = 0;
  79         _m[t].m5 = TRANSPORT_RAIL << 2 | d;
  80         SB(_me[t].m6, 2, 4, 0);
  81         _me[t].m7 = 0;
  82         _me[t].m8 = r;
  83 }
  84
  85 #endif /* TUNNEL_MAP_H */