CGAL users discussion list

["Patrick Hétroy" <>]

Hello Tyver,

It's working even it's ZERO. There's no constraint with dimension for this function.
Recheck your vertex coordinates and detail your code if the problem persists.


Patrick Hétroy

2007/9/3, Tyver Ray <>:

Hello all!

I am having a problem with the incident_faces function provided in the Triangulation_2 class.
On the .jpg I send you, you can see 3 triangles, I would like to select the triangle at the up-right of the image with this function.

It does work when the z parameter isn't equal to ZERO for all the vertex, but, when all the vertex have the z parameter equal to WERO it doesn't work because the face_circulator is always NULL !

My code is :

        Face_circulator fc;
        fc = dt.incident_faces ( vertexInCorner );
        Face_circulator done(fc);

        int count = 0;
        if (fc != (CGAL_NULL_TYPE) NULL)
        {
            do
            {
                if( !dt.is_infinite(fc) )
                    count++;
            }
            while (++fc != done);
        }

Do you have an idea of the problem or a way to resolve it ?

In advance, thank you!

Have a nice day,

Tyv