||(Path rhs [, int rule])
Adds the area covered by this path to the area covered by
replaces this path by a new one whose interior represents the result,
and returns this path to the caller.
By default, interior points in both paths are identified using the
even-odd winding rule, but setting the optional
which is defined in
means the non-zero winding rule will be used to identify the interior of
Yoix is a registered trademark of AT&T Inc.