CGAL users discussion list

[Frederic Bouvier <>]

Hi Peter,

Quoting Peter Hachenberger:

> Hi Fred,
>
> Nef_polyhedron_3 only works with exact kernels. So it does not
> work with Cartesian<double>. At the moment Homoegeneous is the
> fastest kernel for Nef_polyhedron_3.

I managed to have something working with Cartesian<Gmpq> under Linux but it is
dead slow ( I am doing solid intersections inside a 3D rendering loop ). Would
it be faster with Homogenous<Gmpz> ? Cartesian<Gmpz> doesn't work because
to_double() returns only the integral part of numbers.

On VS 2003 it is even much slower and often fail with "Error :!!!!!!!" 
messages.

On VS 2005 it doesn't work because the conversion from Nef_polyhedron to
Polyhedron compares iterators from different containers ( undef_ ) and this is
trapped by the MS STL.

-Fred


--
Frédéric Bouvier
http://frfoto.free.fr                      Photo gallery - album photo
http://www.fotolia.fr/p/2278/partner/2278  Other photo gallery
http://fgsd.sourceforge.net/               FlightGear Scenery Designer