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/* $Id$ */
#ifndef TILE_H
#define TILE_H
#include "macros.h"
#include "map.h"
typedef enum TileTypes {
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,
} TileType;
typedef enum TropicZones {
TROPICZONE_INVALID = 0,
TROPICZONE_DESERT = 1,
TROPICZONE_RAINFOREST = 2,
} TropicZone;
uint GetTileh(uint n, uint w, uint e, uint s, uint *h);
uint GetTileSlope(TileIndex tile, uint *h);
uint GetTileZ(TileIndex tile);
static inline bool CorrectZ(uint tileh)
{
/* tile height must be corrected if the north corner is not raised, but
* any other corner is. These are the cases 1 till 7 */
return IS_INT_INSIDE(tileh, 1, 8);
}
static inline uint TileHeight(TileIndex tile)
{
assert(tile < MapSize());
return GB(_m[tile].type_height, 0, 4);
}
static inline bool IsSteepTileh(uint tileh)
{
return (tileh & 0x10);
}
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) * 8;
}
static inline TileType GetTileType(TileIndex tile)
{
assert(tile < MapSize());
return GB(_m[tile].type_height, 4, 4);
}
static inline void SetTileType(TileIndex tile, TileType type)
{
assert(tile < MapSize());
/* Allow only MP_VOID to be set to border tiles. This code is put here since
* it seems there is a bug that violates this somewhere. (Formely know as
* the "old ship pf" bug, which presented a case in which this broke). It
* can be removed as soon as the bug is squashed. */
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 _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].extra, 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].extra, 0, 2);
}
#endif /* TILE_H */
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