1 /* $Id$ */

     2 

     3 /** @file tunnelbridge.h Header file for things common for tunnels and bridges */

     4 

     5 #ifndef TUNNELBRIDGE_H

     6 #define TUNNELBRIDGE_H

     7 

     8 #include "tile_type.h"

     9 #include "map_func.h"

    10 #include "tunnelbridge_map.h"

    11 

    12 /**

    13  * Calculates the length of a tunnel or a bridge (without end tiles)

    14  * @return length of bridge/tunnel middle

    15  */

    16 static inline uint GetTunnelBridgeLength(TileIndex begin, TileIndex end)

    17 {

    18 	int x1 = TileX(begin);

    19 	int y1 = TileY(begin);

    20 	int x2 = TileX(end);

    21 	int y2 = TileY(end);

    22 

    23 	return abs(x2 + y2 - x1 - y1) - 1;

    24 }

    25 

    26 #endif /* TUNNELBRIDGE_H */