/* $Id$ */ /* * This file is part of OpenTTD. * 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. * 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. * 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/>. */ /** @file autoslope.h Functions related to autoslope. */ #ifndef AUTOSLOPE_H #define AUTOSLOPE_H #include "settings_type.h" #include "company_func.h" #include "depot_func.h" #include "slope_func.h" /** * Autoslope check for tiles with an entrance on an edge. * E.g. depots and non-drive-through-road-stops. * * The test succeeds if the slope is not steep and at least one corner of the entrance edge is on the TileMaxZ() level. * * @note The test does not check if autoslope is enabled at all. * * @param tile The tile. * @param z_new New TileZ. * @param tileh_new New TileSlope. * @param entrance Entrance edge. * @return true iff terraforming is allowed. */ static inline bool AutoslopeCheckForEntranceEdge(TileIndex tile, uint z_new, Slope tileh_new, DiagDirection entrance) { if (IsSteepSlope(tileh_new) || (GetTileMaxZ(tile) != z_new + GetSlopeMaxZ(tileh_new))) return false; return ((tileh_new == SLOPE_FLAT) || CanBuildDepotByTileh(entrance, tileh_new)); } /** * Tests if autoslope is enabled for _current_company. * * Autoslope is disabled for town/industry construction. * * @return true iff autoslope is enabled. */ static inline bool AutoslopeEnabled() { return (_settings_game.construction.autoslope && (_current_company < MAX_COMPANIES || (_current_company == OWNER_NONE && _game_mode == GM_EDITOR))); } #endif /* AUTOSLOPE_H */