00001 /* $Id: tunnelbridge.h 22405 2011-05-01 19:14:12Z rubidium $ */ 00002 00003 /* 00004 * This file is part of OpenTTD. 00005 * 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. 00006 * 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. 00007 * 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/>. 00008 */ 00009 00012 #ifndef TUNNELBRIDGE_H 00013 #define TUNNELBRIDGE_H 00014 00015 #include "map_func.h" 00016 00023 static inline uint GetTunnelBridgeLength(TileIndex begin, TileIndex end) 00024 { 00025 int x1 = TileX(begin); 00026 int y1 = TileY(begin); 00027 int x2 = TileX(end); 00028 int y2 = TileY(end); 00029 00030 return abs(x2 + y2 - x1 - y1) - 1; 00031 } 00032 00033 extern TileIndex _build_tunnel_endtile; 00034 00035 #endif /* TUNNELBRIDGE_H */