CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Martin Baeker wrote:
> Dear all,
>
> in my last question I asked about Nef_polyhedra. by now I found out
> that my problem was due to having an extended kernel.
>
> So here is the next (hopefully more simple) question: Can I convert
> geometric quantities in an easy way between different kernels?
>
> I have:
>
> typedef CGAL::Homogeneous<CGAL::Gmpz>  Kernel;
> typedef CGAL::Extended_homogeneous<CGAL::Gmpz>  EKernel;
> typedef Kernel::Plane_3  Plane_3;
> typedef Kernel::Point_3    Point;
> typedef Kernel::Vector_3  Vector_3;
> typedef EKernel::Plane_3  EPlane_3;
> typedef EKernel::Point_3    EPoint;
> typedef EKernel::Vector_3  EVector_3;
>
> Is there a simple way to convert a Plane_3 into a EPlane_3 (and the
> same with vectors and points) and vice versa? 
Hello,

You should have look at Homogeneous_converter described here:

http://www.cgal.org/Manual/last/doc_html/cgal_manual/Kernel_23_ref/Class_Homogeneous_converter.html#Index_anchor_295

Then depending on what is your "extended kernel", you may need to copy 
extra information by hand.

S.

> Thanks for any help,
>
> Martin.
>
>
>                    Priv.-Doz. Dr. Martin Bäker
>                    Institut für Werkstoffe
>                    Technische Universität Braunschweig
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> <>