56 lines
2.0 KiB
C
56 lines
2.0 KiB
C
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file autoslope.h Functions related to autoslope. */
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#ifndef AUTOSLOPE_H
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#define AUTOSLOPE_H
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#include "company_func.h"
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#include "depot_func.h"
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#include "slope_func.h"
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#include "tile_map.h"
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#include "openttd.h"
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/**
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* Autoslope check for tiles with an entrance on an edge.
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* E.g. depots and non-drive-through-road-stops.
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*
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* The test succeeds if the slope is not steep and at least one corner of the entrance edge is on the TileMaxZ() level.
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*
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* @note The test does not check if autoslope is enabled at all.
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*
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* @param tile The tile.
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* @param z_new New TileZ.
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* @param tileh_new New TileSlope.
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* @param entrance Entrance edge.
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* @return true iff terraforming is allowed.
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*/
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static inline bool AutoslopeCheckForEntranceEdge(TileIndex tile, uint z_new, Slope tileh_new, DiagDirection entrance)
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{
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if (IsSteepSlope(tileh_new) || (GetTileMaxZ(tile) != z_new + GetSlopeMaxZ(tileh_new))) return false;
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return ((tileh_new == SLOPE_FLAT) || CanBuildDepotByTileh(entrance, tileh_new));
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}
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/**
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* Tests if autoslope is enabled for _current_company.
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*
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* Autoslope is disabled for town/industry construction.
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*
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* @return true iff autoslope is enabled.
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*/
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static inline bool AutoslopeEnabled()
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{
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return (_settings_game.construction.autoslope &&
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(_current_company < MAX_COMPANIES ||
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(_current_company == OWNER_NONE && _game_mode == GM_EDITOR)));
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}
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#endif /* AUTOSLOPE_H */
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