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

    10

/**

    11

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

    12

 * @return length of bridge/tunnel middle

    13

 */

    14

static inline uint GetTunnelBridgeLength(TileIndex begin, TileIndex end)

    15

{

    16

	int x1 = TileX(begin);

    17

	int y1 = TileY(begin);

    18

	int x2 = TileX(end);

    19

	int y2 = TileY(end);

    20

    21

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

    22

}

    23

    24

extern TileIndex _build_tunnel_endtile;

    25

    26

#endif /* TUNNELBRIDGE_H */