CGAL hole filling with color

Question

I need to implement a 3D hole filling using CGAL library that support color.

is there any possibility to do it without CGAL library modification? I need to fill the hole with an average color of the hole's edge.

Regards, Ali

....

int main(int argc, char* argv[])
{
  const char* filename = (argc > 1) ? argv[1] : "data/mech-holes-shark.off";


  Mesh mesh;
  OpenMesh::IO::read_mesh(mesh, filename);

  // Incrementally fill the holes
  unsigned int nb_holes = 0;
  BOOST_FOREACH(halfedge_descriptor h, halfedges(mesh))
  {
    if(CGAL::is_border(h,mesh))
    {
      std::vector<face_descriptor>  patch_facets;
      std::vector<vertex_descriptor> patch_vertices;
      bool success = CGAL::cpp11::get<0>(
        CGAL::Polygon_mesh_processing::triangulate_refine_and_fair_hole(
                  mesh,
                  h,
                  std::back_inserter(patch_facets),
                  std::back_inserter(patch_vertices),
     CGAL::Polygon_mesh_processing::parameters::vertex_point_map(get(CGAL::vertex_point, mesh)).
                  geom_traits(Kernel())) );

      CGAL_assertion(CGAL::is_valid_polygon_mesh(mesh));

      std::cout << "* FILL HOLE NUMBER " << ++nb_holes << std::endl;
      std::cout << "  Number of facets in constructed patch: " << patch_facets.size() << std::endl;
      std::cout << "  Number of vertices in constructed patch: " << patch_vertices.size() << std::endl;
      std::cout << "  Is fairing successful: " << success << std::endl;
    }
  }

  CGAL_assertion(CGAL::is_valid_polygon_mesh(mesh));

    OpenMesh::IO::write_mesh(mesh, "filled_OM.off");
  return 0;
}

Answer 1

If you use CGAL::Surface_mesh as Mesh, you can use dynamic property maps to define attributes for your simplices, which allows for example to define colors per face. The "standard" syntax for this is

mesh.add_property_map<face_descriptor, CGAL::Color >("f:color")

I think. There are examples in the documentation of Surface_mesh.