/* $Id$ */ /* * This file is part of OpenTTD. * 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. * 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. * 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/>. */ /** @file tunnelbridge.h Header file for things common for tunnels and bridges */ #ifndef TUNNELBRIDGE_H #define TUNNELBRIDGE_H #include "tile_type.h" /** * Calculates the length of a tunnel or a bridge (without end tiles) * @return length of bridge/tunnel middle */ static inline uint GetTunnelBridgeLength(TileIndex begin, TileIndex end) { int x1 = TileX(begin); int y1 = TileY(begin); int x2 = TileX(end); int y2 = TileY(end); return abs(x2 + y2 - x1 - y1) - 1; } extern TileIndex _build_tunnel_endtile; #endif /* TUNNELBRIDGE_H */