src/tunnel_map.h

   1 /* $Id: tunnel_map.h 23167 2011-11-08 19:44:41Z rubidium $ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * 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.
   6  * 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.
   7  * 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/>.
   8  */
   9
  10 /** @file tunnel_map.h Map accessors for tunnels. */
  11
  12 #ifndef TUNNEL_MAP_H
  13 #define TUNNEL_MAP_H
  14
  15 #include "road_map.h"
  16
  17
  18 /**
  19  * Is this a tunnel (entrance)?
  20  * @param t the tile that might be a tunnel
  21  * @pre IsTileType(t, MP_TUNNELBRIDGE)
  22  * @return true if and only if this tile is a tunnel (entrance)
  23  */
  24 static inline bool IsTunnel(TileIndex t)
  25 {
  26         assert(IsTileType(t, MP_TUNNELBRIDGE));
  27         return !HasBit(_m[t].m5, 7);
  28 }
  29
  30 /**
  31  * Is this a tunnel (entrance)?
  32  * @param t the tile that might be a tunnel
  33  * @return true if and only if this tile is a tunnel (entrance)
  34  */
  35 static inline bool IsTunnelTile(TileIndex t)
  36 {
  37         return IsTileType(t, MP_TUNNELBRIDGE) && IsTunnel(t);
  38 }
  39
  40 TileIndex GetOtherTunnelEnd(TileIndex);
  41 bool IsTunnelInWay(TileIndex, int z);
  42 bool IsTunnelInWayDir(TileIndex tile, int z, DiagDirection dir);
  43
  44 /**
  45  * Makes a road tunnel entrance
  46  * @param t the entrance of the tunnel
  47  * @param o the owner of the entrance
  48  * @param d the direction facing out of the tunnel
  49  * @param r the road type used in the tunnel
  50  */
  51 static inline void MakeRoadTunnel(TileIndex t, Owner o, DiagDirection d, RoadTypes r)
  52 {
  53         SetTileType(t, MP_TUNNELBRIDGE);
  54         SetTileOwner(t, o);
  55         _m[t].m2 = 0;
  56         _m[t].m3 = 0;
  57         _m[t].m4 = 0;
  58         _m[t].m5 = TRANSPORT_ROAD << 2 | d;
  59         SB(_me[t].m6, 2, 4, 0);
  60         _me[t].m7 = 0;
  61         SetRoadOwner(t, ROADTYPE_ROAD, o);
  62         if (o != OWNER_TOWN) SetRoadOwner(t, ROADTYPE_TRAM, o);
  63         SetRoadTypes(t, r);
  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         SB(_m[t].m1, 7, 1, GB(r, 4, 1));
  79         SB(_m[t].m3, 0, 4, GB(r, 0, 4));
  80         _m[t].m4 = 0;
  81         _m[t].m5 = TRANSPORT_RAIL << 2 | d;
  82         SB(_me[t].m6, 2, 4, 0);
  83         _me[t].m7 = 0;
  84 }
  85
  86 #endif /* TUNNEL_MAP_H */