CGAL users discussion list

[malcolm <>]

Hi,
I am using the Constrained_Delaunay_triangulation_2 class. I want to attach
vertex info to the constraint vertices before calling insert_constraint, in
the same way as I can add info to vertices before inserting in a
triangulation. I cannot find a CGAL method to do this. Here's my code

#include <CGAL\Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Constrained_Delaunay_triangulation_2.h>
#include <CGAL/Triangulation_vertex_base_with_info_2.h>

#include <vector>

class VertexInfo
{
public:
        double data;
        int index;

        VertexInfo() {}
        VertexInfo(double e, int i)
                :data(e), index(i) {}
};

typedef CGAL::Exact_predicates_inexact_constructions_kernel                
Kernel;
typedef CGAL::Exact_predicates_tag                                            
      Itag;
typedef CGAL::Triangulation_vertex_base_with_info_2<VertexInfo, Kernel> Vb;
typedef CGAL::Constrained_triangulation_face_base_2<Kernel>                 
Fb;
typedef CGAL::Triangulation_data_structure_2<Vb, Fb>                         
Tds;
typedef CGAL::Constrained_Delaunay_triangulation_2<Kernel, Tds, Itag>   
Delaunay;
typedef Kernel::Point_2                                                       
             
CGAL_Point;

int main()
{
        Delaunay T;
        std::vector< std::pair<CGAL_Point, VertexInfo> > points;
        points.push_back(std::make_pair(CGAL_Point(0.123456789, 0), 
VertexInfo(0.3,
-1)));
        points.push_back(std::make_pair(CGAL_Point(1, 0), VertexInfo(0.5, 
-1)));
        points.push_back(std::make_pair(CGAL_Point(0, 1), VertexInfo(1.3, 
-1)));
        points.push_back(std::make_pair(CGAL_Point(1, 1), VertexInfo(0.8, 
-1)));
        points.push_back(std::make_pair(CGAL_Point(2, 2), VertexInfo(0.3, 
-1)));

        // Triangulate
        T.insert(points.begin(), points.end());

        std::vector< std::pair<CGAL_Point, VertexInfo> > constraintPts;
        constraintPts.push_back(std::make_pair(CGAL_Point(10, 10), 
VertexInfo(1.3,
0)));

        // how do I add constraints with vertex just like above? 
        T.insert_constraint(constraintPts.begin(), constraintPts.end()); // 
this
gives a compiler error 

        return 0;
}

If this is not possible, I would like to get the vertex handles of the
constrained vertices and then attach the vertex info to each vertex. Is this
possible?



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