CGAL users discussion list

[Cody Rose <>]

Thank you. Why does this compile in Release mode though?

Cody

On 8/1/2011 6:05 AM, Michael Hemmer wrote:
> The problem is that the function
>
>    template<typename R>  static
>    CGAL::Plane_3<R>  normalized(const CGAL::Plane_3<R>&  h) {
>   in file Nef_S2/Normalizing.h
>
> assumes that FT is decomposable into a numerator and a denominator.
> This is not the case if FT is CORE::Expr.
>
> The function should first check whether it can decompose FT using the
> tag that is provided by the Fraction_traits.
>
> If FT is not decomposable it is probably best to divide all
> coefficients by the first coefficient that is not zero.
> This way one also achieves a normalized, i.e. unique representation,
> of the plane.
>
> Michael Hemmer
>
>
> On Mon, Aug 1, 2011 at 1:20 AM, Cody 
> Rose<>
>   wrote:
> > In Visual Studio 2010, the code:
> >
> > #include "CGAL/CORE_Expr.h"
> > #include "CGAL/Cartesian.h"
> > #include "CGAL/Nef_polyhedron_3.h"
> >
> > typedef CGAL::Cartesian<CORE::Expr>      K;
> > typedef CGAL::Nef_polyhedron_3<K>      nef;
> >
> > int main() {
> >     nef foo;
> > }
> >
> > compiles in Release mode but not Debug mode. The error is
> >
> > cgal\nef_s2\normalizing.h(307): error C2676: binary '*=' : 'CGAL::Null_tag'
> > does not define this operator or a conversion to a type acceptable to the
> > predefined operator
> >
> > many times. Someone else on this mailing list had this problem back in 2008,
> > but that was resolved by switching kernels. However, I need square roots,
> > and therefore (as I understand it) the only number types I can use are
> > CORE::Expr and leda_real. I'm getting vastly better performance with
> > CORE::Expr so I would really like to avoid leda_real. The fact that this
> > works fine in Release mode indicates to me that there must be some way to
> > get it to work in Debug mode, but the earlier thread didn't discuss why that
> > might be.
> >
> > Thanks,
> > Cody
> >
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