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