CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Dear Brian,

I am sorry but you need to read the documentation:

http://www.cgal.org/Manual/latest/doc_html/cgal_manual/contents.html

The manual of CGAL is made of a user-manual where basically
a rationale and examples are given, and a reference manual
where the precise documentation of each member is given.

In your case have a look in the user manual of triangulation_2, for
the Adding color example here:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Triangulation_2/Chapter_main.html#Section_35.11

The reference for the class Triangulation_face_base_with_info_2 is here:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Triangulation_2_ref/Class_Triangulation_face_base_with_info_2.html


S.


Brian Sanjeewa Rupasinghe wrote:
> Hi,
>
> I added this code. But it did not work. I am relatively new to CGAL. 
> Please help.
>
> typedef CGAL::Triangulation_ds_face_base_with_info_2<Index, Gt> Info; 
>
> Brian.
>
> On Mon, May 23, 2011 at 7:21 AM, Sebastien Loriot (GeometryFactory) 
> <sloriot.ml <http://sloriot.ml>@gmail.com <http://gmail.com>> wrote:
>
>     Brian Sanjeewa Rupasinghe wrote:
>
>         Hi,
>
>         When i run the following to create Delanuay Triangulation and
>         index of the vertices,
>         Following error occurs.
>         error C2039: 'info' : is not a member of
>         'CGAL::Triangulation_ds_face_base_2<TDS>'
>
>     The error is explicit:
>
>     no info is in Triangulation_ds_face_base_2. So you need to use
>     Triangulation_ds_face_base_with_info_2.
>
>     S.
>
>
>         I am new to CGAL. Please help
>
>         Brian.
>
>
>
>         // vertex.cpp : Defines the entry point for the console application.
>         //
>         #include "stdafx.h"
>         #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
>         #include <CGAL/Projection_traits_xy_3.h>
>         #include <CGAL/Delaunay_triangulation_2.h>
>         #include <fstream>
>         /////////////////
>         #include <CGAL/basic.h> #include
>         <CGAL/Triangulation_face_base_2.h> #include
>         <CGAL/Triangulation_vertex_base_2.h> #include
>         <CGAL/Triangulation_vertex_base_with_info_2.h> #include
>         <CGAL/Triangulation_data_structure_2.h>
>         typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
>         typedef CGAL::Projection_traits_xy_3<K>  Gt;
>         typedef K::Point_3   Point;
>         typedef CGAL::Delaunay_triangulation_2<Gt> CDT; typedef
>         CGAL::Triangulation_face_base_2<Gt> Fb;   typedef
>         CDT::Finite_faces_iterator Finite_faces_iterator;
>         typedef CDT::Vertex_handle Vertex_handle; typedef
>         CDT::Face_handle Face_handle; typedef int Index; typedef
>         CGAL::Triangulation_vertex_base_with_info_2<Index, Gt> Info;  
>         int _tmain()
>         {
>         //std::ifstream in("data/terrain.cin");
>         std::ifstream in("data/test.cin");
>         std::istream_iterator<Point> begin(in);
>         std::istream_iterator<Point> end;
>         CDT dt;
>         dt.insert(begin, end);
>         //
>         // Loop through faces of triangulation and assign index to
>         vertices int q = 0; Finite_faces_iterator fvi =
>         dt.finite_faces_begin();
>         for( ; fvi != dt.finite_faces_end(); ++fvi)
>         {                 fvi->info()= q++; } //
>         std::cout << dt.number_of_vertices() << std::endl;
>         std::cout << dt.number_of_faces() << std::endl;
>         std::cout << dt;
>         return 0;
>         }
>
>
>
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