CGAL users discussion list

[Cody Rose <>]

Can leda_reals be used as number types for kernels that are meant to 
support Nef_polyhedron_3s? The following trivial program fails to compile:

#include <CGAL/leda_real.h>
#include <CGAL/Homogeneous.h>
#include <CGAL/Nef_polyhedron_3.h>

typedef leda_real NumberType;
typedef CGAL::Homogeneous<NumberType> Kernel;
typedef CGAL::Nef_polyhedron_3<Kernel> Nef_polyhedron;

int main() {
   Nef_polyhedron n;
   return 0;
}

with error C2446: ':' : no conversion from 
'CGAL::Null_functor::result_type' to 'RT'    c:\program 
files\cgal\include\cgal\nef_s2\normalizing.h

(Cartesian kernels produce similar results).

Chapter 25 of the user manual (regarding Nef_polyhedra) says that "All 
Cartesian and homogeneous kernels of Cgal are suitable if the number 
type parameter follows the usual requirements of being a model of the 
/CGAL::FieldNumberType <cid:>/ concept 
for the Cartesian kernels, or the /CGAL::RingNumberType 
<cid:>/ concept for the homogeneous 
kernels, respectively." leda_real models RingNumberType, but apparently 
that isn't enough. Is there any way I can get this work?

Cody Rose