CGAL users discussion list

[Yaoyu Hu <>]

Thank you Maxime and Mael! The Euler::remove_face() finally works. I was so silly when I first attempted to use Euler::remove_face(), where I remove more elements than I really wanted. Now the downstream smoothing works fine. 

I also tried Mael's suggestion and apply duplicate_non_manifold_vertices(). As long as I understand, this function will duplicate the non-manifold vertices in the same spatial positions. Say, a single non-manifold vertex becomes multiple manifold vertices, am I right? If this is the case, how can I smooth out the local regions around the original non-manifold vertices, to make the region more smooth? It seems to me that the facets associated with the newly duplicated vertices and the nearby facets are still arranged in a pattern much more complex than a plain surface.

In the sample surface mesh I enclosed in the previous email, there are some wired facets locate around the surfaces near the top. These facets consist of most of the original self-intersections and non-manifold vertices. After I remove the self-intersecting facets and duplicate the non-manifold vertices, but the remaining facets are still in wired positions. How can I further process the mesh so that these bad regions become more like a plain surface?

Thank you for the help!