Make polyhedron_3_to_lcc() generic for FaceGraph

[afabri]

Summary of Changes

While reviewing the hex mesh code I saw that the function reading a polyhedron should be generalized.

Todo

• Move part of the header to the LCC package. There are two other functions in there.

Release Management

• Affected package(s): LCC
• License and copyright ownership: unchanged

[afabri]

/build:v0

[github-actions]

The documentation is built. It will be available, after a few minutes, here: https://cgal.github.io/9582/v0/Manual/index.html

[gdamiand]

The name of the function (and of the file) should be changed?
face_graph_to_lcc?

[sloriot]

Strange copy_face_graph() does not work...

[afabri]

Strange copy_face_graph() does not work...

Good point. I give it a try, but immaediately get errors when just adding
#include <CGAL/boost/graph/graph_traits_Linear_cell_complex_for_combinatorial_map.h>

In fact it needs this typedef:

typedef CGAL::Linear_cell_complex_for_bgl_combinatorial_map_helper<2, 3, MyTraits>::type LCC;

And this shows that the functions do not do the same. The LCC for copy_face_graph() does not represent a volume.
Question to Guillaume: What happens when the surface has a border?