CGAL users discussion list

[Andreas Fabri <>]

Hello,

On the reference manual page of Triangulation_3
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Triangulation_3_ref/Class_Triangulation_3.html#Cross_link_anchor_1363

you can find the method

Triangle        t.triangle ( Facet f)


Taken that you have a Facet_iterator, it shouldn't be a surprise
that when you dereference the iterator you get a Facet.

So you have to write

t.triangle(*it)

andreas



On 25/01/2013 22:44, Sidnei Basei wrote:
> Hello,
>
> I'm new in CGAL library and I didn't found any example showing how I can get
> triangles from facet iterator.
>
> Please, check my code bellow... and help me please....
>
>
> #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
> #include <CGAL/Triangulation_3.h>
>
> #include <iostream>
> #include <fstream>
> #include <cassert>
> #include <vector>
> #include <fstream>
>
> typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
>
> typedef CGAL::Triangulation_3<K>      Triangulation;
>
> typedef Triangulation::Cell_handle    Cell_handle;
> typedef Triangulation::Vertex_handle  Vertex_handle;
> typedef Triangulation::Locate_type    Locate_type;
> typedef Triangulation::Point          Point;
>
> int main()
> {
>      // construction from a list of points :
>      std::vector<Point> P;
>
>
>
>      std::ifstream is("/Users/srb/Downloads/tora_teste3.csv");
>      int n;
>      is >> n;
>      std::cout << "Reading " << n << " points " << std::endl;
>
>      for( ; n>0 ; n--)    {
>          Point p;
>          is >> p;
>          P.push_back(p);
>      }
>
>      std::cout << "Readed: " << P.size() << std::endl;
>
>      std::cout << "iniciando. ... " << std::endl;
>
>
>      Triangulation T(P.begin(), P.end());
>      Triangulation::Facet_iterator it;
>
>      unsigned int cc=0;
>      for(it=T.facets_begin();it!=T.facets_end();it++) {
>          /// --- I'll integrate with OpenGL here...
>          // T.triangle() <---- i want get a triangle here!!!
>      }
>
>      std::cout << T.number_of_facets() << " cc: " << cc << std::endl;  //
> number_of_facets and cc are equals
>
>      return 0;
> }
>
>
>
> Thanks in advance.
>
>
>
> --
> View this message in context: 
> http://cgal-discuss.949826.n4.nabble.com/Getting-a-Triangle-from-Facet-iterator-tp4656587.html
> Sent from the cgal-discuss mailing list archive at Nabble.com.


--
Andreas Fabri, PhD
Chief Officer, GeometryFactory
Editor, The CGAL Project

phone: +33.492.954.912    skype: andreas.fabri