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/* $Id$ */

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/** @file tile_type.h Types related to tiles. */

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#ifndef TILE_TYPE_H

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#define TILE_TYPE_H

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#include "core/enum_type.hpp"

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enum {

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	TILE_SIZE   = 16,   ///< Tiles are 16x16 "units" in size

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	TILE_PIXELS = 32,   ///< a tile is 32x32 pixels

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	TILE_HEIGHT =  8,   ///< The standard height-difference between tiles on two levels is 8 (z-diff 8)

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	MAX_TILE_HEIGHT     = 15,                    ///< Maximum allowed tile height

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	MAX_SNOWLINE_HEIGHT = (MAX_TILE_HEIGHT - 2), ///< Maximum allowed snowline height

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};

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/**

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 * The different types of tiles.

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 *

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 * Each tile belongs to one type, according whatever is build on it.

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 *

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 * @note A railway with a crossing street is marked as MP_ROAD.

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 */

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enum TileType {

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	MP_CLEAR,               ///< A tile without any structures, i.e. grass, rocks, farm fields etc.

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	MP_RAILWAY,             ///< A railway

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	MP_ROAD,                ///< A tile with road (or tram tracks)

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	MP_HOUSE,               ///< A house by a town

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	MP_TREES,               ///< Tile got trees

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	MP_STATION,             ///< A tile of a station

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	MP_WATER,               ///< Water tile

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	MP_VOID,                ///< Invisible tiles at the SW and SE border

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	MP_INDUSTRY,            ///< Part of an industry

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	MP_TUNNELBRIDGE,        ///< Tunnel entry/exit and bridge heads

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	MP_UNMOVABLE,           ///< Contains an object with cannot be removed like transmitters

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};

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/**

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 * Additional infos of a tile on a tropic game.

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 *

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 * The tropiczone is not modified during gameplay. It mainly affects tree growth. (desert tiles are visible though)

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 *

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 * In randomly generated maps:

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 *  TROPICZONE_DESERT: Generated everywhere, if there is neither water nor mountains (TileHeight >= 4) in a certain distance from the tile.

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 *  TROPICZONE_RAINFOREST: Genereated everywhere, if there is no desert in a certain distance from the tile.

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 *  TROPICZONE_NORMAL: Everywhere else, i.e. between desert and rainforest and on sea (if you clear the water).

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 *

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 * In scenarios:

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 *  TROPICZONE_NORMAL: Default value.

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 *  TROPICZONE_DESERT: Placed manually.

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 *  TROPICZONE_RAINFOREST: Placed if you plant certain rainforest-trees.

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 */

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enum TropicZone {

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	TROPICZONE_NORMAL     = 0,      ///< Normal tropiczone

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	TROPICZONE_DESERT     = 1,      ///< Tile is desert

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	TROPICZONE_RAINFOREST = 2,      ///< Rainforest tile

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};

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/**

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 * The index/ID of a Tile.

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 */

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typedef uint32 TileIndex;

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/**

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 * The very nice invalid tile marker

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 */

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static const TileIndex INVALID_TILE = (TileIndex)-1;

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#endif /* TILE_TYPE_H */