1 /* $Id$ */

     2 

     3 /** @file autoslope.h */

     4 

     5 #ifndef AUTOSLOPE_H

     6 #define AUTOSLOPE_H

     7 

     8 #include "depot.h"

     9 

    10 /**

    11  * Autoslope check for tiles with an entrance on an edge.

    12  * E.g. depots and non-drive-through-road-stops.

    13  *

    14  * The test succeeds if the slope is not steep and at least one corner of the entrance edge is on the TileMaxZ() level.

    15  *

    16  * @note The test does not check if autoslope is enabled at all.

    17  *

    18  * @param tile The tile.

    19  * @param z_new New TileZ.

    20  * @param tileh_new New TileSlope.

    21  * @param entrance Entrance edge.

    22  * @return true iff terraforming is allowed.

    23  */

    24 static inline bool AutoslopeCheckForEntranceEdge(TileIndex tile, uint z_new, Slope tileh_new, DiagDirection entrance)

    25 {

    26 	if (IsSteepSlope(tileh_new) || (GetTileMaxZ(tile) != z_new + GetSlopeMaxZ(tileh_new))) return false;

    27 	return ((tileh_new == SLOPE_FLAT) || CanBuildDepotByTileh(entrance, tileh_new));

    28 }

    29 

    30 /**

    31  * Tests if autoslope is enabled for _current_player.

    32  *

    33  * Autoslope is disabled for town/industry construction and old ai players.

    34  *

    35  * @return true iff autoslope is enabled.

    36  */

    37 static inline bool AutoslopeEnabled()

    38 {

    39 	return (_patches.autoslope && IsValidPlayer(_current_player) && !_is_old_ai_player);

    40 }

    41 

    42 #endif /* AUTOSLOPE_H */