CGAL users discussion list

[Dinesh Shetty <>]

Well I was not using exact kernel before, but I was adviced to use it as I also use 2D arrangements

On Thu, May 3, 2018 at 8:27 AM Mael Rouxel-Labbé <> wrote:

This is unrelated to your problem with "_with_info" classes, though.

Looking at your constrained Delaunay triangulation tag, I assume that you are using an exact constructions kernel, which you cannot do here. You should use an inexact construction kernel, such as 'CGAL::Exact_predicates_inexact_constructions_kernel'.

Note that this also means that you cannot use the tag "Exact_intersections" for your constrained triangulation either (but you can use the exact predicates tag if you use EPICK).

On 03/05/2018 13:53, Dinesh Shetty wrote:

Still does not work. Here is the updated typedefs

typedef CGAL::Triangulation_vertex_base_with_info_2<std::pair< std::pair<int, int>, std::pair<int, IdType> >, Kernel > Vb;

typedef CGAL::Delaunay_mesh_vertex_base_2<Kernel, Vb> Vertex_base;

typedef CGAL::Constrained_Delaunay_triangulation_face_base_2<Kernel> Fb;

typedef CGAL::Delaunay_mesh_face_base_2< Kernel, Fb > Face_base; typedef CGAL::Exact_intersections_tag Itag;

typedef CGAL::Triangulation_data_structure_2< Vertex_base, Face_base > Triangulation_data;

typedef CGAL::Constrained_Delaunay_triangulation_2< Kernel, Triangulation_data, Itag > CDTriangulation;

typedef CGAL::Constrained_triangulation_plus_2<CDTriangulation> CDTriangulationPlus;

typedef CGAL::Delaunay_mesh_size_criteria_2< CDTriangulationPlus > Criteria;

typedef CGAL::Delaunay_mesher_2< CDTriangulationPlus, Criteria > Mesher_Base;

typedef CDTriangulationPlus::Vertex_handle Vertex_handle;

typedef std::vector< Vertex_handle > Vertex_handles;

typedef CDTriangulationPlus::Face_handle Face_handle;

On Thu, May 3, 2018 at 4:50 AM, Mael Rouxel-Labbé <> wrote:

This is not the correct approach. Please use the solution that was
provided to you back then.


On 02/05/2018 21:59, Florian Prud'homme wrote:
> Hello ,
>
> I remember I have a problem a bit similar 6 months ago . I created a new
> file for this (in order to make it work with "data info" and "constrained"
> triangulation) :
>
>
>> /*
>>   * Delaunay_mesh_vertex_base_with_info_2.h
>>   *
>>   *  Created on: Nov 23, 2017
>>   *      Author: florian
>>   */
>> #ifndef DELAUNAY_MESH_VERTEX_BASE_WITH_INFO_2_H_
>> #define DELAUNAY_MESH_VERTEX_BASE_WITH_INFO_2_H_
>> #include <CGAL/Triangulation_vertex_base_2.h>
>> namespace CGAL {
>> template<typename Info_, typename GT, typename Vb =
>> Triangulation_vertex_base_2&lt;GT> >
>> class Delaunay_mesh_vertex_base_with_info_2: public Vb {
>>      Info_ _info;
>> public:
>>      typedef typename GT::FT FT;
>>      typedef typename Vb::Face_handle Face_handle;
>>      typedef typename Vb::Point Point;
>>      typedef Info_ Info;
>>      template<typename TDS2>
>>      struct Rebind_TDS {
>>          typedef typename Vb::template Rebind_TDS<TDS2>::Other Vb2;
>>          typedef Delaunay_mesh_vertex_base_with_info_2<Info, GT, Vb2>
> Other;
>>      };
>> protected:
>>      FT sizing_info_;
>> public:
>>      Delaunay_mesh_vertex_base_with_info_2() :
>>              Vb(), sizing_info_(0.) {
>>      }
>>      Delaunay_mesh_vertex_base_with_info_2(const Point & p) :
>>              Vb(p), sizing_info_(0.) {
>>      }
>>      Delaunay_mesh_vertex_base_with_info_2(const Point & p, Face_handle c)
> :
>>              Vb(p, c), sizing_info_(0.) {
>>      }
>>      Delaunay_mesh_vertex_base_with_info_2(Face_handle c) :
>>              Vb(c), sizing_info_(0.) {
>>      }
>>      void set_sizing_info(const FT& s) {
>>          sizing_info_ = s;
>>      }
>>      const FT& sizing_info() const {
>>          return sizing_info_;
>>      }
>>      const Info& info() const {
>>          return _info;
>>      }
>>      Info& info() {
>>          return _info;
>>      }
>> };
>> } // namespace CGAL
>> #endif /* DELAUNAY_MESH_VERTEX_BASE_WITH_INFO_2_H_ */
> 
>
>
>
> --
> Sent from: http://cgal-discuss.949826.n4.nabble.com/
>


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