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/* $Id$ */
/** @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 */
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