How to use Polyhedron_3 with new surface_Delaunay_remeshing method ?

[hanilan]

Hi,
I try to use the new surface_Delaunay_remeshing() method provided in CGAL 5.6 with Polyhedron_3 but I struggle to compile my source as there are a lot of missing things when using Polyhedron_3 instead Surface_mesh.
What I did:

• Add a VertexItem derived from HalfedgeDS_vertex_max_base_with_id (need to add a time stamp and redefine 3 ctor)
  
• Add a patch_id() method in FaceItem
• Add a face_index_map, a vertex_point_map and a face_patch_map when calling surface_Delaunay_remeshing()

But I have still missing functions as set_feature_edge() for example. I can continue to add missing functions to achieve to compile my sample but I'm wondering if it is normal to not have a straightforward way to use Polyhedron_3 with this function. It seems Mesh_Polyhedron_3 is more suitable as it fill some requirements need by surface_Delaunay_remeshing() but I don't think you can override the polyhedron items. Maybe I miss something but it would be interesting to have an example of using a Polyhedron_3 with surface_Delaunay_remeshing() in CGAL doc.

[hanilan]

I finally succeed to compile in copying the polyhedron items code in Mesh_Polyhedron_3 to have my own items. But not an easy way to do the first time.

[afabri]

As the function only requires a model of FaceGraph I do not see why you need an extra items class. I will have a look. If this is needed this is at least a documentation bug.

[hanilan]

Yes I don't need extra items class to use the function but I meant if you need to have them you have to rewrite item code in Mesh_polyhedron_3 or maybe unherit from them. But soorry, my first message was unclear about that.

[afabri]

Hi @hanilan, Can you put your solution on gist.github.com, so that we can close the discussion. Best, Andreas

[hanilan]

Hi Andreas, the sample is here https://gist.github.com/hanilan/7c3fe21bdaf0fcb1995dbc80ce1b7f3d.