CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

You are probably missing:

namespace CGAL{
  template <typename T>
  struct graph_has_property<My::Mesh, T>
      : public CGAL::graph_has_property<My::Mesh::Base, T>
  {};

as in this example:
https://doc.cgal.org/latest/Surface_mesh/Surface_mesh_2sm_derivation_8cpp-example.html

Best regards,

Sebastien.

On 5/27/20 8:29 AM, calvin_cw ( via cgal-discuss 
Mailing List) wrote:
> I extended the polyhedron_3 class to include other parameters in each of the
> point, edge, face class.
>
> When i tried to use the edge_collapse class, it send an error regarding the
> vertex_index_map in the boost template.
>
> I managed to solve the problem in version 4.12.1 by including the following
> line to extend the boost graph_traits and property map.
>
> ******************
> namespace boost {
>         template <>
>         struct boost::graph_traits<feSurfaceMesh> :
>                 public boost::graph_traits<Poly_3>
>         {};
> } // namespace boost
>
> namespace boost {
>         template <class Tag>
>         struct property_map<feSurfaceMesh, Tag> :
>                 public property_map<Poly_3, Tag>
>         {};
> } //namespace boost
> ***********************
>
> however, in the version 5.0, this error cropped up again, sending an error
>
> Severity        Code    Description     Project File    Line    Suppression 
> State
> Error   C2039   'value_type': is not a member of 
> 'boost::property_traits<bool>'
> AutoBlocking2DFreeGLUT
> D:\installedLibraries\CGAL-5.0.2\include\CGAL\Surface_mesh_simplification\Detail\Edge_collapse.h
> 71      
>
>
> Question : Do I need to extend the boost::property_traits? If so, how do I
> do it?
> thanks!
>
>
>
>
> --
> Sent from: http://cgal-discuss.949826.n4.nabble.com/