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(svn r20443) -Codechange: more TileHash to a more generic location

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rubidium 2010-08-10 23:31:43 +00:00
parent 091f8ff731
commit 1dbd2223ad
2 changed files with 32 additions and 31 deletions
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33
src/tile_map.h
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@ -206,4 +206,35 @@ Slope GetTileSlope(TileIndex tile, uint *h);
uint GetTileZ(TileIndex tile);
uint GetTileMaxZ(TileIndex tile);
#endif /* TILE_TYPE_H */
/**
* Calculate a hash value from a tile position
*
* @param x The X coordinate
* @param y The Y coordinate
* @return The hash of the tile
*/
static inline uint TileHash(uint x, uint y)
{
uint hash = x >> 4;
hash ^= x >> 6;
hash ^= y >> 4;
hash -= y >> 6;
return hash;
}
/**
* Get the last two bits of the TileHash
* from a tile position.
*
* @see TileHash()
* @param x The X coordinate
* @param y The Y coordinate
* @return The last two bits from hash of the tile
*/
static inline uint TileHash2Bit(uint x, uint y)
{
return GB(TileHash(x, y), 0, 2);
}
#endif /* TILE_MAP_H */

30
src/town.h
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@ -232,36 +232,6 @@ DECLARE_ENUM_AS_BIT_SET(TownActions)
extern const byte _town_action_costs[TACT_COUNT];
extern TownID _new_town_id;
/**
* Calculate a hash value from a tile position
*
* @param x The X coordinate
* @param y The Y coordinate
* @return The hash of the tile
*/
static inline uint TileHash(uint x, uint y)
{
uint hash = x >> 4;
hash ^= x >> 6;
hash ^= y >> 4;
hash -= y >> 6;
return hash;
}
/**
* Get the last two bits of the TileHash
* from a tile position.
*
* @see TileHash()
* @param x The X coordinate
* @param y The Y coordinate
* @return The last two bits from hash of the tile
*/
static inline uint TileHash2Bit(uint x, uint y)
{
return GB(TileHash(x, y), 0, 2);
}
/**
* Set the default name for a depot/waypoint
* @tparam T The type/class to make a default name for