src/tunnelbridge.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 tunnelbridge.h Header file for things common for tunnels and bridges */
   9
  10 #ifndef TUNNELBRIDGE_H
  11 #define TUNNELBRIDGE_H
  12
  13 #include "map_func.h"
  14 #include "tile_map.h"
  15
  16 void MarkBridgeDirty(TileIndex begin, TileIndex end, DiagDirection direction, uint bridge_height);
  17 void MarkBridgeDirty(TileIndex tile);
  18
  19 /**
  20  * Calculates the length of a tunnel or a bridge (without end tiles)
  21  * @param begin The begin of the tunnel or bridge.
  22  * @param end   The end of the tunnel or bridge.
  23  * @return length of bridge/tunnel middle
  24  */
  25 static inline uint GetTunnelBridgeLength(TileIndex begin, TileIndex end)
  26 {
  27         int x1 = TileX(begin);
  28         int y1 = TileY(begin);
  29         int x2 = TileX(end);
  30         int y2 = TileY(end);
  31
  32         return abs(x2 + y2 - x1 - y1) - 1;
  33 }
  34
  35 /**
  36  * Sets the ownership of the bridge/tunnel ramps
  37  * @param begin The begin of the tunnel or bridge.
  38  * @param end   The end of the tunnel or bridge.
  39  * @param owner The new owner to set
  40  */
  41 static inline void SetTunnelBridgeOwner(TileIndex begin, TileIndex end, Owner owner)
  42 {
  43         SetTileOwner(begin, owner);
  44         SetTileOwner(end, owner);
  45 }
  46
  47 extern TileIndex _build_tunnel_endtile;
  48
  49 #endif /* TUNNELBRIDGE_H */