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 "rail_map.h"
  14 #include "road_map.h"
  15
  16
  17 /**
  18  * Is this a tunnel (entrance)?
  19  * @param t the tile that might be a tunnel
  20  * @pre IsTileType(t, MP_TUNNELBRIDGE)
  21  * @return true if and only if this tile is a tunnel (entrance)
  22  */
  23 static inline bool IsTunnel(TileIndex t)
  24 {
  25         assert(IsTileType(t, MP_TUNNELBRIDGE));
  26         return !HasBit(_m[t].m5, 7);
  27 }
  28
  29 /**
  30  * Is this a tunnel (entrance)?
  31  * @param t the tile that might be a tunnel
  32  * @return true if and only if this tile is a tunnel (entrance)
  33  */
  34 static inline bool IsTunnelTile(TileIndex t)
  35 {
  36         return IsTileType(t, MP_TUNNELBRIDGE) && IsTunnel(t);
  37 }
  38
  39 TileIndex GetOtherTunnelEnd(TileIndex);
  40 bool IsTunnelInWay(TileIndex, int z);
  41 bool IsTunnelInWayDir(TileIndex tile, int z, DiagDirection dir);
  42
  43 /**
  44  * Makes a road tunnel entrance
  45  * @param t the entrance of the tunnel
  46  * @param o the owner of the entrance
  47  * @param d the direction facing out of the tunnel
  48  * @param r the road type used in the tunnel
  49  */
  50 static inline void MakeRoadTunnel(TileIndex t, Owner o, DiagDirection d, RoadType road_rt, RoadType tram_rt)
  51 {
  52         SetTileType(t, MP_TUNNELBRIDGE);
  53         SetTileOwner(t, o);
  54         _m[t].m2 = 0;
  55         _m[t].m3 = 0;
  56         _m[t].m4 = 0;
  57         _m[t].m5 = TRANSPORT_ROAD << 2 | d;
  58         SB(_me[t].m6, 2, 4, 0);
  59         _me[t].m7 = 0;
  60         _me[t].m8 = 0;
  61         SetRoadOwner(t, RTT_ROAD, o);
  62         if (o != OWNER_TOWN) SetRoadOwner(t, RTT_TRAM, o);
  63         SetRoadTypes(t, road_rt, tram_rt);
  64 }
  65
  66 /**
  67  * Makes a rail tunnel entrance
  68  * @param t the entrance of the tunnel
  69  * @param o the owner of the entrance
  70  * @param d the direction facing out of the tunnel
  71  * @param r the rail type used in the tunnel
  72  */
  73 static inline void MakeRailTunnel(TileIndex t, Owner o, DiagDirection d, RailType r)
  74 {
  75         SetTileType(t, MP_TUNNELBRIDGE);
  76         SetTileOwner(t, o);
  77         _m[t].m2 = 0;
  78         _m[t].m3 = 0;
  79         _m[t].m4 = 0;
  80         _m[t].m5 = TRANSPORT_RAIL << 2 | d;
  81         SB(_me[t].m6, 2, 4, 0);
  82         _me[t].m7 = 0;
  83         _me[t].m8 = 0;
  84         SetRailType(t, r);
  85         SetRoadTypes(t, INVALID_ROADTYPE, INVALID_ROADTYPE);
  86 }
  87
  88 #endif /* TUNNEL_MAP_H */