How to check if the Surface(Geom_BoundedSurface) self-intersection ?

Hi all:
as the title
Is there any method can accomplish this purpose
of checking surface self-intersection?
please~ this is an important task for me.
many thanks.

Fresh Cheng

hunter_wwq's picture

Hello! I meet the same problem When I realize Extrude function, had you solved this problem, please help me!Thanks!