CGAL users discussion list

[Guillaume Caron <>]

Indeed, this is working. Thanks a lot.

Guillaume.

Le 21/05/2013 11:01, Sebastien Loriot (GeometryFactory) a écrit :
> My patch was buggy, here is the patch file that makes it works with 
> lazy_exact_nt and EPEC kernel.
>
> Let me know if it works for you too.
>
> Sebastien.
>
> On 05/21/2013 10:57 AM, Guillaume Caron wrote:
> > Just one more thing, when i want work with the cartesian kernel i have
> > this error at the compilation:
> >
> > /include/CGAL/Nef_3/SNC_io_parser.h: In static member function ‘static
> > void CGAL::Geometry_io<CGAL::Cartesian_tag,
> > CGAL::Epeck>::print_point(std::ostream&, CGAL::Point_3<R>)’:
> > include/CGAL/Nef_3/SNC_io_parser.h:781: erreur: ‘Exact_kernel’ in class
> > ‘CGAL::Epeck’ does not name a type
> > include/CGAL/Nef_3/SNC_io_parser.h:781: erreur: invalid type in
> > declaration before ‘;’ token/
> > ...
> >
> > I have to include CGAL/exact_predicates_exact_constructions_kernel.h to
> > not have this error.
> > Even if I do not use it.
> >
> > Guillaume.
> >
> >
> >
> > Le 16/05/2013 15:53, Sebastien Loriot (GeometryFactory) a écrit :
> > > On 05/16/2013 03:32 PM, Guillaume Caron wrote:
> > > > Ok, thanks a lot, indeed, this is working for the predefined kernel.
> > > >
> > > > So what version of CGAL/Nef_3/SNC_io_parser.h is it?
> > > Nothing official for now. However, it will be in the next release.
> > >
> > > > And do you think that the problem for Lazy_exact_nt will be fixed for
> > > > the next release of CGAL?
> > > It's on my todo list.
> > >
> > > Sebastien.
> > >
> > > > Guillaume.
> > > >
> > > >
> > > > Le 16/05/2013 14:18, Sebastien Loriot (GeometryFactory) a écrit :
> > > > > On 05/16/2013 12:06 PM, Guillaume Caron wrote:
> > > > > > Yes, I still have the same problem/error.
> > > > > The specialization indeed no longer match. Try with to use the
> > > > > following version of CGAL/Nef_3/SNC_io_parser.h
> > > > >
> > > > > It worked on my machine.
> > > > >
> > > > > Sebastien.
> > > > >
> > > > > > Guillaume.
> > > > > >
> > > > > > Le 16/05/2013 12:02, Sebastien Loriot (GeometryFactory) a écrit :
> > > > > > > On 05/16/2013 11:56 AM, Guillaume Caron wrote:
> > > > > > > > Ok, thank you for the answer but as I said I have the same problem
> > > > > > > > with
> > > > > > > > the predefined kernel
> > > > > > > > CGAL::Exact_predicates_exact_constructions_kernel.
> > > > > > > >
> > > > > > > > And if I understood correctly,
> > > > > > > > CGAL::Exact_predicates_exact_constructions_kernel is equal to:
> > > > > > > > CGAL::Cartesian<CGAL::Lazy_exact_nt<CGAL::Quotient<CGAL:Gmpz>>>.
> > > > > > > No, it is something like Lazy_kernel< Simple_cartesian< 
> > > > > > > CGAL::Gmpq >,
> > > > > > > ... > for which a specialization is available.
> > > > > > >
> > > > > > > Do you still have the problem?
> > > > > > >
> > > > > > > Sebastien.
> > > > > > >
> > > > > > > > So if the problem is a specialization of an internal writer 
> > > > > > > > missing
> > > > > > > > for
> > > > > > > > a kernel using Lazy_exact_nt, the predefined kernel can not work
> > > > > > > > either,
> > > > > > > > no?
> > > > > > > >
> > > > > > > > Guillaume.
> > > > > > > >
> > > > > > > >
> > > > > > > > Le 16/05/2013 11:38, Sebastien Loriot (GeometryFactory) a écrit :
> > > > > > > > > There is a specialization of an internal writer missing for a
> > > > > > > > > kernel
> > > > > > > > > using Lazy_exact_nt as number type.
> > > > > > > > >
> > > > > > > > > If it is OK for you, use
> > > > > > > > > CGAL::Exact_predicates_exact_constructions_kernel as "kernel".
> > > > > > > > >
> > > > > > > > > I'll try to fix this for the next release of CGAL.
> > > > > > > > >
> > > > > > > > > Sebastien.
> > > > > > > > >
> > > > > > > > > On 05/15/2013 03:51 PM, Guillaume C wrote:
> > > > > > > > > > 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.
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > --
> > > > > > > > > > View this message in context:
> > > > > > > > > > http://cgal-discuss.949826.n4.nabble.com/Problem-to-write-read-nef-file-tp4657449.html 
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > Sent from the cgal-discuss mailing list archive at Nabble.com.