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Hi,

I would like to display 2D Delaunay triangulation in a console application just like I display an int a=5 (for example list of all vertices corresponding to triangles) . 

I think that I would need to overload << operator for 2D Delaunay triangulation but I have some problems.

 

I can see that "cout << dt", where dt is an object of 2D Delaunay triangulation class sort of works, but I don't understand the output (see input and output below).

I tried to overload the << operator but it doesn't change anything:

ofstream& operator << (ofstream& stream, const Delaunay& dt1)
{
cout << "Number of faces is:";
stream << dt1.number_of_faces();
return stream;
}

 

Regards

Michał Michalak

Input

(the first two columns are XY, then elevation, and last column is ID - because I use Projection_traits_xy_3 and Triangulation_vertex_base_with_info_2):

0 0 0 1
1 0 0 2
0 1 0 3

Output:

4 4 2
1 0 0
0 1 0
0 0 0

2 0 3
1 2 3
0 1 3
2 1 0

2 1 3
0 2 3
1 0 3
2 0 1