/* $Id$ */ /* * 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 tile_map.h Map writing/reading functions for tiles. */ #ifndef TILE_MAP_H #define TILE_MAP_H #include "slope_type.h" #include "map_func.h" #include "core/bitmath_func.hpp" #include "settings_type.h" /** * Returns the height of a tile * * This function returns the height of the northern corner of a tile. * This is saved in the global map-array. It does not take affect by * any slope-data of the tile. * * @param tile The tile to get the height from * @return the height of the tile * @pre tile < MapSize() */ static inline uint TileHeight(TileIndex tile) { assert(tile < MapSize()); return GB(_m[tile].type_height, 0, 4); } /** * Sets the height of a tile. * * This function sets the height of the northern corner of a tile. * * @param tile The tile to change the height * @param height The new height value of the tile * @pre tile < MapSize() * @pre heigth <= MAX_TILE_HEIGHT */ static inline void SetTileHeight(TileIndex tile, uint height) { assert(tile < MapSize()); assert(height <= MAX_TILE_HEIGHT); SB(_m[tile].type_height, 0, 4, height); } /** * Returns the height of a tile in pixels. * * This function returns the height of the northern corner of a tile in pixels. * * @param tile The tile to get the height * @return The height of the tile in pixel */ static inline uint TilePixelHeight(TileIndex tile) { return TileHeight(tile) * TILE_HEIGHT; } /** * Get the tiletype of a given tile. * * @param tile The tile to get the TileType * @return The tiletype of the tile * @pre tile < MapSize() */ static inline TileType GetTileType(TileIndex tile) { assert(tile < MapSize()); return (TileType)GB(_m[tile].type_height, 4, 4); } /** * Set the type of a tile * * This functions sets the type of a tile. If the type * MP_VOID is selected the tile must be at the south-west or * south-east edges of the map and vice versa. * * @param tile The tile to save the new type * @param type The type to save * @pre tile < MapSize() * @pre type MP_VOID <=> tile is on the south-east or south-west edge. */ static inline void SetTileType(TileIndex tile, TileType type) { assert(tile < MapSize()); /* VOID tiles (and no others) are exactly allowed at the lower left and right * edges of the map. If _settings_game.construction.freeform_edges is true, * the upper edges of the map are also VOID tiles. */ assert((TileX(tile) == MapMaxX() || TileY(tile) == MapMaxY() || (_settings_game.construction.freeform_edges && (TileX(tile) == 0 || TileY(tile) == 0))) == (type == MP_VOID)); SB(_m[tile].type_height, 4, 4, type); } /** * Checks if a tile is a give tiletype. * * This function checks if a tile got the given tiletype. * * @param tile The tile to check * @param type The type to check agains * @return true If the type matches agains the type of the tile */ static inline bool IsTileType(TileIndex tile, TileType type) { return GetTileType(tile) == type; } /** * Checks if a tile is valid * * @param tile The tile to check * @return True if the tile is on the map and not one of MP_VOID. */ static inline bool IsValidTile(TileIndex tile) { return tile < MapSize() && !IsTileType(tile, MP_VOID); } /** * Returns the owner of a tile * * This function returns the owner of a tile. This cannot used * for tiles which type is one of MP_HOUSE, MP_VOID and MP_INDUSTRY * as no company owned any of these buildings. * * @param tile The tile to check * @return The owner of the tile * @pre IsValidTile(tile) * @pre The type of the tile must not be MP_HOUSE and MP_INDUSTRY */ static inline Owner GetTileOwner(TileIndex tile) { assert(IsValidTile(tile)); assert(!IsTileType(tile, MP_HOUSE)); assert(!IsTileType(tile, MP_INDUSTRY)); return (Owner)_m[tile].m1; } /** * Sets the owner of a tile * * This function sets the owner status of a tile. Note that you cannot * set a owner for tiles of type MP_HOUSE, MP_VOID and MP_INDUSTRY. * * @param tile The tile to change the owner status. * @param owner The new owner. * @pre IsValidTile(tile) * @pre The type of the tile must not be MP_HOUSE and MP_INDUSTRY */ static inline void SetTileOwner(TileIndex tile, Owner owner) { assert(IsValidTile(tile)); assert(!IsTileType(tile, MP_HOUSE)); assert(!IsTileType(tile, MP_INDUSTRY)); _m[tile].m1 = owner; } /** * Checks if a tile belongs to the given owner * * @param tile The tile to check * @param owner The owner to check agains * @return True if a tile belongs the the given owner */ static inline bool IsTileOwner(TileIndex tile, Owner owner) { return GetTileOwner(tile) == owner; } /** * Set the tropic zone * @param tile the tile to set the zone of * @param type the new type * @pre tile < MapSize() */ static inline void SetTropicZone(TileIndex tile, TropicZone type) { assert(tile < MapSize()); assert(!IsTileType(tile, MP_VOID) || type == TROPICZONE_NORMAL); SB(_m[tile].m6, 0, 2, type); } /** * Get the tropic zone * @param tile the tile to get the zone of * @pre tile < MapSize() * @return the zone type */ static inline TropicZone GetTropicZone(TileIndex tile) { assert(tile < MapSize()); return (TropicZone)GB(_m[tile].m6, 0, 2); } Slope GetTileSlope(TileIndex tile, uint *h); uint GetTileZ(TileIndex tile); uint GetTileMaxZ(TileIndex tile); #endif /* TILE_TYPE_H */