src/tunnelbridge.h

   1 /* $Id: tunnelbridge.h 22405 2011-05-01 19:14:12Z 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 tunnelbridge.h Header file for things common for tunnels and bridges */
  11
  12 #ifndef TUNNELBRIDGE_H
  13 #define TUNNELBRIDGE_H
  14
  15 #include "map_func.h"
  16 #include "tile_map.h"
  17
  18 void MarkBridgeDirty(TileIndex begin, TileIndex end, DiagDirection direction, uint bridge_height, const ZoomLevel mark_dirty_if_zoomlevel_is_below = ZOOM_LVL_END);
  19 void MarkBridgeDirty(TileIndex tile, const ZoomLevel mark_dirty_if_zoomlevel_is_below = ZOOM_LVL_END);
  20 void MarkBridgeOrTunnelDirty(TileIndex tile, const ZoomLevel mark_dirty_if_zoomlevel_is_below = ZOOM_LVL_END);
  21 uint GetTunnelBridgeSignalSimulationSignalCount(uint length);
  22
  23 /**
  24  * Calculates the length of a tunnel or a bridge (without end tiles)
  25  * @param begin The begin of the tunnel or bridge.
  26  * @param end   The end of the tunnel or bridge.
  27  * @return length of bridge/tunnel middle
  28  */
  29 static inline uint GetTunnelBridgeLength(TileIndex begin, TileIndex end)
  30 {
  31         int x1 = TileX(begin);
  32         int y1 = TileY(begin);
  33         int x2 = TileX(end);
  34         int y2 = TileY(end);
  35
  36         return abs(x2 + y2 - x1 - y1) - 1;
  37 }
  38
  39 /**
  40  * Sets the ownership of the bridge/tunnel ramps
  41  * @param begin The begin of the tunnel or bridge.
  42  * @param end   The end of the tunnel or bridge.
  43  * @param owner The new owner to set
  44  */
  45 static inline void SetTunnelBridgeOwner(TileIndex begin, TileIndex end, Owner owner)
  46 {
  47         SetTileOwner(begin, owner);
  48         SetTileOwner(end, owner);
  49 }
  50
  51 /**
  52  * Get number of signals on bridge or tunnel with signal simulation.
  53  * @param begin The begin of the tunnel or bridge.
  54  * @param end   The end of the tunnel or bridge.
  55  * @pre IsTunnelBridgeWithSignalSimulation(begin)
  56  */
  57 static inline uint GetTunnelBridgeSignalSimulationSignalCount(TileIndex begin, TileIndex end)
  58 {
  59         return GetTunnelBridgeSignalSimulationSignalCount(GetTunnelBridgeLength(begin, end));
  60 }
  61
  62
  63 extern TileIndex _build_tunnel_endtile;
  64
  65 #endif /* TUNNELBRIDGE_H */