CGAL users discussion list

[Frederic Bouvier <>]

Hi,

I am resurrecting an old thread here

I wrote :
> it looks like CGAL::Nef_polyhedron_3 doesn't work with
> CGAL::Cartesian<double>, at least compiled with Visual Studio 200[35].


Peter Hachenberger a écrit :
> Hi Fred,
>
>   
>> 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.
>>     
>
> Yes, Homogeneous<Gmpz> is much faster. Also try Homogeneous<mpz_class>.
> But be careful; with a homogeneous kernel your input files must have
> integer coordinates. These problems will hopefully be gone in the next
> CGAL Version. Then floating point filtering will be effective with
> Nef_polyhedron_3. This means that the fastest Kernel will be a Cartesian
> kernel and it will be much faster. 
>   

Is it possible to use a filtered cartesian kernel with double now with
CGAL 3.3 ?

Thanks
-Fred

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Frédéric Bouvier
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