CGAL users discussion list

[Zohar <>]

Wow, the whole thing (halfedge_collapse) is changed. Are there still 5 cases
doing the same operations?

I don't fully follow. 
Record the neighborhood (a patch around the collapsed edge) before the
collapse, and upon undo I simply cut this neighborhood from the coarse mesh
and restore it to the way it was, sounds like a good idea.
The thing is that I have additional data on the edges which needs to be
updated if edges are collapsed (not related to the multi-resolution), so I
still need to follow what happens and update my own data in the coarse mesh.

What do you mean by "modify halfedge_collapse", should I modify cgal sources
or write a template instantiation override?

What do you mean by "clean up the data structure from the pending
simplices"? I assume it's related to the first step that leaves the
simplicies, which are now actually deleted. But I don't see why the
cut/paste patch idea needs all this.




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