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["Sebastien Loriot (GeometryFactory)" <>]

Nef_3 requires a kernel with exact constructions. So usually the best
choice is Exact_predicates_exact_constructions_kernel.

About the interoperability with Polyhedron_3, the traits class of the
polyhedron and of the nef should be the same.
If you have a polyhedron using another traits, then you can convert it
using for example CGAL/Polyhedron_copy_3.h as follow:

Poly2 target;
CGAL::Polyhedron_copy_3<Poly1, Poly1::HalfedgeDS> modifier(source);
target.delegate(modifier);

Sebastien.


On 10/07/2015 02:31 PM, Merlin Etzold wrote:
> Dear All,
>
> I am working on the inverted problem of Thiago (I am interested what is left 
> after to polyhedrons are subtracted form each other)  and have the same 
> issues as Thiago and Taus. Some clarification would be really great.
>
> Please keep posting about any insights you may get, I will do the same as I 
> go along.
>
> Best wishes,
> Merlin :)
>
> -----Original Message-----
> From: 
>
>  
> [mailto:]
>  On Behalf Of Taus Møller
> Sent: 07 October 2015 09:56
> To: 
>
> Subject: Re: [cgal-discuss] Nef_polyhedron and 
> Exact_predicates_inexact_constructions_kernel
>
> I have run into the same problem. I have a hard time know what kernel are 
> usable for what. Even though the exact and inexact construction kernel models 
> the same concepts, they seem to be different in some ways. I have found that 
> the Exact_predicates_exact_construction_kernel
> works for use with with Nef_polyhedra_3.
>
> On 2 October 2015 at 18:30, Thiago Milanetto Schlittler 
> <>
>  wrote:
> > Hello!
> >
> >     I’m trying to use Nef polyhedrons to find the intersections between
> > polyhedrons, and I’m having some problems. The compiler returns the
> > following error when trying to convert a polyhedron to a nef_polyhedron:
> >
> > In file included from /opt/local/include/CGAL/Nef_3/SNC_k3_tree_traits.h:24:
> > /opt/local/include/CGAL/Nef_3/Bounding_box_3.h:90:34: error: no member
> > named 'lo' in 'CGAL::Box_intersection_d::Box_d<double, 3,
> > CGAL::Box_intersection_d::ID_EXPLICIT>'
> >        std::copy( q, q + 3, Base::lo );
> >
> >     I’m using the “Exact_predicates_inexact_constructions_kernel”,
> > could this be the reason?
> >
> > Thanks in advance,
> > Thiago Milanetto Schlittler
>
>
>
> --
> Regards
> Taus Møller
> Software Developer, Apiosoft
>
> --
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