Returns the center of this CellID in (u,v)-space. Note that the center of the cell is defined as the point at which it is recursively subdivided into four children; in general, it is not at the midpoint of the (u,v) rectangle covered by the cell.
Returns the center of this CellID in (u,v)-space. Note that the center of the cell is defined as the point at which it is recursively subdivided into four children; in general, it is not at the midpoint of the (u,v) rectangle covered by the cell.