rubidium@9703: /* $Id$ */
rubidium@9703: 
rubidium@9703: /** @file autoslope.h */
rubidium@9703: 
rubidium@9703: #ifndef AUTOSLOPE_H
rubidium@9703: #define AUTOSLOPE_H
rubidium@9703: 
rubidium@9703: #include "depot.h"
rubidium@9723: #include "settings_type.h"
rubidium@9724: #include "player_func.h"
rubidium@9703: 
rubidium@9703: /**
rubidium@9703:  * Autoslope check for tiles with an entrance on an edge.
rubidium@9703:  * E.g. depots and non-drive-through-road-stops.
rubidium@9703:  *
rubidium@9703:  * The test succeeds if the slope is not steep and at least one corner of the entrance edge is on the TileMaxZ() level.
rubidium@9703:  *
rubidium@9703:  * @note The test does not check if autoslope is enabled at all.
rubidium@9703:  *
rubidium@9703:  * @param tile The tile.
rubidium@9703:  * @param z_new New TileZ.
rubidium@9703:  * @param tileh_new New TileSlope.
rubidium@9703:  * @param entrance Entrance edge.
rubidium@9703:  * @return true iff terraforming is allowed.
rubidium@9703:  */
rubidium@9703: static inline bool AutoslopeCheckForEntranceEdge(TileIndex tile, uint z_new, Slope tileh_new, DiagDirection entrance)
rubidium@9703: {
rubidium@9703: 	if (IsSteepSlope(tileh_new) || (GetTileMaxZ(tile) != z_new + GetSlopeMaxZ(tileh_new))) return false;
rubidium@9703: 	return ((tileh_new == SLOPE_FLAT) || CanBuildDepotByTileh(entrance, tileh_new));
rubidium@9703: }
rubidium@9703: 
rubidium@9703: /**
rubidium@9703:  * Tests if autoslope is enabled for _current_player.
rubidium@9703:  *
rubidium@9703:  * Autoslope is disabled for town/industry construction.
rubidium@9703:  *
rubidium@9703:  * @return true iff autoslope is enabled.
rubidium@9703:  */
rubidium@9703: static inline bool AutoslopeEnabled()
rubidium@9703: {
glx@9704: 	return (_patches.autoslope &&
glx@9704: 	        (IsValidPlayer(_current_player) ||
glx@9705: 	         (_current_player == OWNER_NONE && _game_mode == GM_EDITOR)));
rubidium@9703: }
rubidium@9703: 
rubidium@9703: #endif /* AUTOSLOPE_H */