CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Have a look at this PR that contains a convenience header to ease
the use of CGAL algorithm with dereived classes.

https://github.com/CGAL/cgal/pull/4938

This example is using Polyhedron:
https://github.com/CGAL/cgal/pull/4938/files#diff-a9b02a9ba5a7ef7823d5cf4e47187e2e

If I get it right the macros in your case must be:

#define CGAL_GRAPH_TRAITS_INHERITANCE_TEMPLATE_PARAMS class Kernel, 
class feSurf_Elements
#define CGAL_GRAPH_TRAITS_INHERITANCE_CLASS_NAME feSurfMesh<Kernel, 
feSurf_Elements>
#define CGAL_GRAPH_TRAITS_INHERITANCE_BASE_CLASS_NAME 
Polyhedron_3<Kernel, feSurf_Elements>

Best regards,

Sebastien.


On 9/9/20 9:22 AM, calvin_cw ( via cgal-discuss 
Mailing List) wrote:
> Hi,
>
>       I am trying to compile a sample hole filling code using an inherited
> polyhedron class. The code is reproduced below. I keep getting the error
> related to sparse matrix class. Hope someone can assist to point out the
> error. thanks!
>
> regards
> Calvin
>
> <<<< Start code
>
> #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
> #include <CGAL/Polygon_mesh_processing/triangulate_hole.h>
> #include <CGAL/Polyhedron_3.h>
> #include <CGAL/IO/OFF_reader.h>
> #include <iostream>
> #include <fstream>
> #include <vector>
> #include <CGAL/Polyhedron_items_with_id_3.h>
>
>
> typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
>
> template <class Refs, class ID>
> class feEdge_Surf : public CGAL::HalfedgeDS_halfedge_base< Refs,
> CGAL::Tag_true, CGAL::Tag_true, CGAL::Tag_true >
> {
>         typedef ID size_type;
> private:
>         size_type mID;
> public:
>         size_type&       id() { return mID; }
>         size_type const& id() const { return mID; }
> };
>
> template <class Refs, class Traits, class ID>
> class feFace_Surf : public CGAL::HalfedgeDS_face_base<Refs, CGAL::Tag_true,
> typename Traits::Plane_3>
> {
>         typedef ID size_type;
> private:
>
>         size_type mID;
> public:
>         size_type&       id() { return mID; }
>         size_type const& id() const { return mID; }
> };
>
> template <class Refs, class Traits, class ID>
> class feNode_Surf : public CGAL::HalfedgeDS_vertex_base< Refs,
> CGAL::Tag_true, typename Traits::Point_3 >
> {
>
>         typedef typename Traits::Point_3                                      
>                                                   Point_3;
>         typedef ID size_type;
> private:
>         size_type mID;
> public:
>         size_type&       id() { return mID; }
>         size_type const& id() const { return mID; }
>
>         feNode_Surf(const Point_3& p) : CGAL::HalfedgeDS_vertex_base< Refs,
> CGAL::Tag_true, Point_3>(p)
>         {}
>
>         feNode_Surf() : CGAL::HalfedgeDS_vertex_base< Refs, CGAL::Tag_true,
> Point_3>()
>         {}
>
> };
>
>
> class feSurf_Elements : public CGAL::Polyhedron_items_3
> {
> public:
>         template <class Refs, class Traits>
>         struct Vertex_wrapper {
>                 typedef feNode_Surf<Refs, Traits, std::size_t> Vertex;
>         };
>
>         template <class Refs, class Traits>
>         struct Halfedge_wrapper {
>                 typedef feEdge_Surf<Refs, std::size_t> Halfedge;
>
>         };
>         template <class Refs, class Traits>
>         struct Face_wrapper {
>                 typedef feFace_Surf<Refs, Traits, std::size_t> Face;
>         };
>
> };
>
> typedef CGAL::Polyhedron_3<Kernel, feSurf_Elements>::Point_3      Point_fe;
>
> typedef CGAL::Polyhedron_3<Kernel, feSurf_Elements>       Poly_3;
> template<class Kernel, class feSurf_Elements>
> class feSurfMesh : public Poly_3
> {
> public:
>         typedef Point_fe Base;
> };
>
> typedef feSurfMesh<Kernel, feSurf_Elements>                                   
>                     feSurfaceMesh;
>
> namespace boost {
>         template <>
>         struct graph_traits<feSurfaceMesh> :
>                 public graph_traits<Poly_3>
>         {};
> } // namespace boost
>
> namespace boost {
>         template <class Tag>
>         struct property_map<feSurfaceMesh, Tag> :
>                 public property_map<Poly_3, Tag>
>         {};
> } //namespace boost
>
> namespace CGAL {
>         template <typename T>
>         struct graph_has_property<feSurfaceMesh, T>
>                 : public CGAL::graph_has_property<Poly_3, T>
>         {};
> }
>
> typedef CGAL::Polyhedron_3<Kernel, feSurf_Elements>::Halfedge_handle      
> HalfEdge_handle;
> typedef CGAL::Polyhedron_3<Kernel, feSurf_Elements>::Facet_handle             
>     
> Facet_handle;
> typedef CGAL::Polyhedron_3<Kernel, feSurf_Elements>::Vertex_handle        
> SurfPt_handle;
>
>
> int main(int argc, char* argv[])
> {
>         const char* filename = (argc > 1) ? argv[1] : 
> "data/mech-holes-shark.off";
>         std::ifstream input(filename);
>
>         feSurfaceMesh feMesh;
>         CGAL::read_off(input, feMesh);
>
>         // Incrementally fill the holes
>         unsigned int nb_holes = 0;
>         for (HalfEdge_handle h : halfedges(feMesh))
>         {
>                 if (h->is_border())
>                 {
>                         std::vector<Facet_handle>  patch_facets;
>                         std::vector<SurfPt_handle> patch_vertices;
>                         bool success = std::get<0>(
>                                 
> CGAL::Polygon_mesh_processing::triangulate_refine_and_fair_hole(
>                                         feMesh,
>                                         h,
>                                         std::back_inserter(patch_facets),
>                                         std::back_inserter(patch_vertices),
>                                 
> CGAL::Polygon_mesh_processing::parameters::vertex_point_map(get(CGAL::vertex_point,
> feMesh)).geom_traits(Kernel())));
>
>                         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 << " Fairing : " << (success ? "succeeded" : 
> "failed") <<
> std::endl;
>                         ++nb_holes;
>                 }
>         }
>
>         std::cout << std::endl;
>         std::cout << nb_holes << " holes have been filled" << std::endl;
>
>         std::ofstream out("filled.off");
>         out.precision(17);
>         out << feMesh << std::endl;
>         return 0;
> }
>
>
>
>
>
> --
> Sent from: http://cgal-discuss.949826.n4.nabble.com/