Function IsTileFlat

src/tile_map.cpp:95–109

* Check if a given tile is flat * @param tile Tile to check * @param h If not \c nullptr, pointer to storage of z height (only if tile is flat) * @return Whether the tile is flat */

 * @return Whether the tile is flat
 */
bool IsTileFlat(TileIndex tile, int *h)
{
	uint x1 = TileX(tile);
	uint y1 = TileY(tile);
	uint x2 = std::min(x1 + 1, Map::MaxX());
	uint y2 = std::min(y1 + 1, Map::MaxY());

	uint z = TileHeight(tile);
	if (TileHeight(TileXY(x2, y1)) != z) return false;
	if (TileHeight(TileXY(x1, y2)) != z) return false;
	if (TileHeight(TileXY(x2, y2)) != z) return false;

	if (h != nullptr) *h = z;
	return true;
}

/**
 * Get bottom height of the tile