smatz@8894: /* $Id$ */
smatz@8894: 
smatz@8894: /** @file tunnelbridge.h Header file for things common for tunnels and bridges */
smatz@8894: 
smatz@8894: #ifndef TUNNELBRIDGE_H
smatz@8894: #define TUNNELBRIDGE_H
smatz@8894: 
smatz@8894: #include "tile_type.h"
smatz@8894: #include "map_func.h"
smatz@8894: #include "tunnelbridge_map.h"
smatz@8894: 
smatz@8894: /**
smatz@8894:  * Calculates the length of a tunnel or a bridge (without end tiles)
smatz@8894:  * @return length of bridge/tunnel middle
smatz@8894:  */
smatz@8894: static inline uint GetTunnelBridgeLength(TileIndex begin, TileIndex end)
smatz@8894: {
smatz@8894: 	int x1 = TileX(begin);
smatz@8894: 	int y1 = TileY(begin);
smatz@8894: 	int x2 = TileX(end);
smatz@8894: 	int y2 = TileY(end);
smatz@8894: 
smatz@8894: 	return abs(x2 + y2 - x1 - y1) - 1;
smatz@8894: }
smatz@8894: 
smatz@8894: #endif /* TUNNELBRIDGE_H */