CGAL users discussion list

[Guillaume C <>]

Hi,

I'm new to CGAL, and i try to write a Nef_polyhedron in a nef file and read
it after. But i have an error when i use lazy_exact_nt or  predefined
kernels.

My program:

/
typedef CGAL::Lazy_exact_nt < CGAL::Gmpq >              FT_t;
typedef CGAL::Cartesian< FT_t >                         kernel;
typedef CGAL::Nef_polyhedron_3< kernel >                Nef_polyhedron;
typedef CGAL::Polyhedron_3< kernel >                    Polyhedron;
typedef Polyhedron::Point_3                                     Point;



int main() 
{

        Point p(sqrt(2),      0,      0);
        Point q(      0,sqrt(2),      0);
        Point r(      0,      0,sqrt(2));
        Point s(      0,      0,      0);

        Nef_polyhedron Cube,Cube2;
        Polyhedron P;
        P.make_tetrahedron( p, q, r, s);
        Cube=P; 

        std::ofstream out ("temp.nef");
        out << Cube;

        std::ifstream in ("temp.nef");
        in >> Cube;

        return 0;
}/

And the error:

/terminate called after throwing an instance of 'CGAL::Assertion_exception'
  what():  CGAL ERROR: assertion violation!
File: /home/ostab/PACKAGE/CGAL-3.9/include/CGAL/Nef_3/SNC_io_parser.h
Line: 1368
Explanation: SNC_io_parser::read: error in node line
Abandon/

Thank you.



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