I’m filtering closed (poly)surfaces from a selection set.
However, either I’m missing the obvious or there is no straight forward way to test if a surface or poly(surface) is closed.
Rhino.IsPolysurfaceClosed for polysurfaces yet for surfaces one apparently needs to test
Rhino.IsSurfaceClosed () for both U and V as well as
IsSurfacePeriodic() and even
IsSurfaceSingular()'to find closed sphere-type surfaces
Am I being dense or is there truly no other way to easily test for a (poly)surface to be open or closed?