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(svn r12513) -Codechange: rename OriginalTileRandomiser something more descriptive

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skidd13
2008-03-31 15:10:24 +00:00
parent a0895d57fa
commit 4cc6140619
3 changed files with 18 additions and 12 deletions
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24
src/town_cmd.cpp
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@@ -129,15 +129,21 @@ static TownDrawTileProc * const _town_draw_tile_procs[1] = {
TownDrawHouseLift
};
uint OriginalTileRandomiser(uint x, uint y)
/**
* Calculate a hash value from a tile position
*
* @param x The X coordinate
* @param y The Y coordinate
* @return The hash of the tile
*/
uint TileHash2Bit(uint x, uint y)
{
uint variant;
variant = x >> 4;
variant ^= x >> 6;
variant ^= y >> 4;
variant -= y >> 6;
variant &= 3;
return variant;
uint hash = x >> 4;
hash ^= x >> 6;
hash ^= y >> 4;
hash -= y >> 6;
hash &= 3;
return hash;
}
/**
@@ -175,7 +181,7 @@ static void DrawTile_Town(TileInfo *ti)
}
/* Retrieve pointer to the draw town tile struct */
dcts = &_town_draw_tile_data[house_id << 4 | OriginalTileRandomiser(ti->x, ti->y) << 2 | GetHouseBuildingStage(ti->tile)];
dcts = &_town_draw_tile_data[house_id << 4 | TileHash2Bit(ti->x, ti->y) << 2 | GetHouseBuildingStage(ti->tile)];
if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);