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[Brian Sanjeewa Rupasinghe <>]

Dear Sir,

This is the code i have used to create Delaunay triangulation and then to print

number of vertices and faces. Now i need to retrieve coordinates of each vertex

using an index. Please let me know how it can be done?  I followed up tutorial in following link.

http://www.cgal.org/Manual/3.4/doc_html/cgal_manual/Triangulation_2/Chapter_main.html#Section_29.11

But could not get how to do it.

#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>

#include <CGAL/Projection_traits_xy_3.h>

#include <CGAL/Delaunay_triangulation_2.h>

#include <fstream>

typedef CGAL::Exact_predicates_inexact_constructions_kernel K;

typedef CGAL::Projection_traits_xy_3<K>  Gt;

typedef CGAL::Delaunay_triangulation_2<Gt> Delaunay;

typedef K::Point_3   Point;

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;

Delaunay dt;

dt.insert(begin, end);

std::cout << dt.number_of_vertices() << std::endl;

std::cout << dt.number_of_faces() << std::endl;

std::cout << dt;

return 0;

}

Best regards,

Brian.

On Tue, May 17, 2011 at 4:26 PM, Sebastien Loriot (GeometryFactory) <sloriot.ml@gmail.com> wrote:

Brian Sanjeewa Rupasinghe wrote:

Hi,

Suppose i have a list of ten points in a text file.
I want to create a voronoi diagram of these
points. How van i do it? I am new to CGAL
and please help. I use MS Visual C++ for
programming. I can read the point coordinates
from the file.

Brian.

You can use the Delaunay_triangulation_2 demo.

Sources in the CGAL tarball are here CGAL-3.8/demo/Triangulation_2.
In addition, on windows a precompiled demo is available here:
http://www.cgal.org/demo/3.8/delaunay_triangulation_2.zip

The format for input points is
x1 y1
x2 y2
x3 y3
....
xn yn

S.

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