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/* $Id$ */
/** @file tile.h */
#ifndef TILE_H
#define TILE_H
#include "macros.h"
#include "openttd.h"
#include "map.h"
#include "slope.h"
/** Maximum allowed tile height */
#define MAX_TILE_HEIGHT 15
/** Maximum allowed snowline height */
#define MAX_SNOWLINE_HEIGHT (MAX_TILE_HEIGHT - 2)
enum TileType {
MP_CLEAR,
MP_RAILWAY,
MP_STREET,
MP_HOUSE,
MP_TREES,
MP_STATION,
MP_WATER,
MP_VOID, // invisible tiles at the SW and SE border
MP_INDUSTRY,
MP_TUNNELBRIDGE,
MP_UNMOVABLE,
};
enum TropicZone {
TROPICZONE_INVALID = 0,
TROPICZONE_DESERT = 1,
TROPICZONE_RAINFOREST = 2,
};
Slope GetTileSlope(TileIndex tile, uint *h);
uint GetTileZ(TileIndex tile);
uint GetTileMaxZ(TileIndex tile);
static inline uint TileHeight(TileIndex tile)
{
assert(tile < MapSize());
return GB(_m[tile].type_height, 0, 4);
}
static inline void SetTileHeight(TileIndex tile, uint height)
{
assert(tile < MapSize());
assert(height < 16);
SB(_m[tile].type_height, 0, 4, height);
}
static inline uint TilePixelHeight(TileIndex tile)
{
return TileHeight(tile) * TILE_HEIGHT;
}
static inline TileType GetTileType(TileIndex tile)
{
assert(tile < MapSize());
return (TileType)GB(_m[tile].type_height, 4, 4);
}
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 */
assert((TileX(tile) == MapMaxX() || TileY(tile) == MapMaxY()) == (type == MP_VOID));
SB(_m[tile].type_height, 4, 4, type);
}
static inline bool IsTileType(TileIndex tile, TileType type)
{
return GetTileType(tile) == type;
}
static inline Owner GetTileOwner(TileIndex tile)
{
assert(tile < MapSize());
assert(!IsTileType(tile, MP_HOUSE));
assert(!IsTileType(tile, MP_VOID));
assert(!IsTileType(tile, MP_INDUSTRY));
return (Owner)_m[tile].m1;
}
static inline void SetTileOwner(TileIndex tile, Owner owner)
{
assert(tile < MapSize());
assert(!IsTileType(tile, MP_HOUSE));
assert(!IsTileType(tile, MP_VOID));
assert(!IsTileType(tile, MP_INDUSTRY));
_m[tile].m1 = 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 assert(tile < MapSize());
*/
static inline void SetTropicZone(TileIndex tile, TropicZone type)
{
assert(tile < MapSize());
SB(_m[tile].m6, 0, 2, type);
}
/**
* Get the tropic zone
* @param tile the tile to get the zone of
* @pre assert(tile < MapSize());
* @return the zone type
*/
static inline TropicZone GetTropicZone(TileIndex tile)
{
assert(tile < MapSize());
return (TropicZone)GB(_m[tile].m6, 0, 2);
}
#endif /* TILE_H */
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