CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

If you look at that page:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Triangulation_2_ref/Class_Triangulation_2.htm

you'll see that the insert function taking an iterator range
can only have a point as value_type (which is not the case for Delaunay).


Sebastien.

On 04/02/2012 05:23 AM, edward wrote:
> Hi, everyone,
> I had a problem on using Triangulation_2 with
> Triangulation_vertex_base_with_info_2.
> Here are main codes:
>
> typedef CGAL::Exact_predicates_inexact_constructions_kernel CEPIC_K;
> typedef CGAL::Triangulation_vertex_base_with_info_2<unsigned int, CEPIC_K>
> Vb2Uint;
> typedef CGAL::Triangulation_data_structure_2<Vb2Uint>                         
>                                             TdsVb2Uint;
> typedef CGAL::Delaunay_triangulation_2<CEPIC_K, TdsVb2Uint>                   
>                             
> DelaunayInfoUint_2;
> typedef CGAL::Triangulation_2<CEPIC_K, TdsVb2Uint>                            
>                     
> TriangulationInfoUint_2;
> void function(vector<Point_3>  &pts)
> {
> vector<  pair<Point_2, unsigned int>  >pointsUint(pts.size());
> for(unsigned int i=0;i<pts.size();++i)
> {
> pointsUint[i]= pair&lt;Point_2, unsigned int>(Point_2(pts[i].x(),
> pts[i].y()), i);
> }
> TriangulationInfoUint_2 dtInfoUint;
> dtInfoUint.insert( pointsUint.begin(), pointsUint.end());
> if(dtInfoUint.number_of_vertices()==0)
>         {
>                 cout<<"Error! Number of vertices is 0!"<<endl;
>                 return;
>         }
> }
> If I use DelaunayInfoUint_2, then this funciton works well. But if I use
> TriangulationInfoUint_2 instead of DelaunayInfoUint_2, the compiler reports
> error like this:
>
> error C2664: 'CGAL::Point_2&lt;R_>::Point_2(const CGAL::Origin&)' : cannot
> convert parameter 1 from 'std::pair<_Ty1,_Ty2>' to 'const CGAL::Origin&'
> 1>
>            with
> 1>           [
> 1>               R_=CGAL::Epick
> 1>           ]
> 1>           and
> 1>           [
> 1>               _Ty1=Point_2,
> 1>               _Ty2=unsigned int
> 1>           ]
> 1>           Reason: cannot convert from 'std::pair<_Ty1,_Ty2>' to 'const
> CGAL::Origin'
> 1>           with
> 1>           [
> 1>               _Ty1=Point_2,
> 1>               _Ty2=unsigned int
> 1>           ]
> 1>           No user-defined-conversion operator available that can perform
> this conversion, or the operator cannot be called
>
> In my opinion, it seems that for Triangulation_2, structure
> Triangulation_vertex_base_with_info_2 does not work.
> Am I rigth? Or does my codes have some falts?
>
> Hope you could help
>
> Best regards
>
> Edward
>
>
> --
> View this message in context: 
> http://cgal-discuss.949826.n4.nabble.com/Triangulation-2-with-info-tp4525119p4525119.html
> Sent from the cgal-discuss mailing list archive at Nabble.com.