CGAL users discussion list

[Sebastien Loriot <>]

Hi Andrew!

do you want to see code or would you be more interested in an 
interactive live demo of what you can do?

Best regards,

Sebastien.

On 12/4/20 11:16 PM, Andrew Cunningham wrote:
> Hi Andreas,
> No, it's not much of a major issue. Our 3D coordinates are 'float' but
> it's easy enough to use double when creating CGAL structures.
>
> I would be more interested in seeing some examples of the use of "PMP
> split" algorithms.
>
> Andrew
>
> On Thu, Dec 3, 2020 at 1:46 AM Andreas Fabri
> <> wrote:
> > Hi Andrew,
> >
> > Is float what you use in your applications?   Adding support for it
> > would not be a major issue,
> > but you are the first user who requests that.
> >
> > Best,
> >
> > Andreas
> >
> > On 12/2/2020 10:33 PM, Andrew Cunningham wrote:
> > > The issue can be resolved by using the <double> kernel. That's an
> > > acceptable solution for me but does point out the difficulty of
> > > template based programming when error messages can be obscure to say
> > > the least.
> > >
> > > On Wed, Dec 2, 2020 at 10:16 AM Andrew Cunningham <> 
> > > wrote:
> > > > The error from the Visual C++ compiler ( 2019) is similar ( this is
> > > > not a Intel Compiler issue)
> > > >
> > > > 1>D:\CGAL-5.1\include\CGAL/NT_converter.h(33,1): error C2440:
> > > > '<function-style-cast>': cannot convert from 'const NT1' to 'NT2'
> > > > 1>        with
> > > > 1>        [
> > > > 1>            NT1=CGAL::Lazy_exact_nt<CGAL::Gmpq>
> > > > 1>        ]
> > > > 1>        and
> > > > 1>        [
> > > > 1>            NT2=float
> > > > 1>        ]
> > > > 1>D:\CGAL-5.1\include\CGAL/NT_converter.h(33,19): message : No
> > > > user-defined-conversion operator available that can perform this
> > > > conversion, or the operator cannot be called
> > > > 1>D:\CGAL-5.1\include\CGAL/NT_converter.h(32): message : while
> > > > compiling class template member function 'NT2
> > > > CGAL::NT_converter<CGAL::Lazy_exact_nt<CGAL::Gmpq>,NT2>::operator
> > > > ()(const NT1 &) const'
> > > >
> > > > On Wed, Dec 2, 2020 at 10:06 AM Andrew Cunningham <> 
> > > > wrote:
> > > > > Hi,
> > > > > I am trying to use
> > > > >
> > > > > void CGAL::Polygon_mesh_processing::split ( TriangleMesh &  tm,
> > > > > const Plane_3 &  plane,
> > > > > const NamedParameters &  np )
> > > > >
> > > > > There are no examples in 5.1 for this API.
> > > > >
> > > > >
> > > > > When I do try and compile my code using this API and a <float> kernel
> > > > > I am getting an error message
> > > > >
> > > > > using K = CGAL::Simple_cartesian< float >;
> > > > > using Point_3                  = K::Point_3;
> > > > > using Mesh                     = CGAL::Surface_mesh< Point_3 >;
> > > > > using Plane                     = K::Plane_3;
> > > > >
> > > > >
> > > > > CGAL/NT_converter.h(33): error : no suitable conversion function from
> > > > > "const CGAL::Lazy_exact_nt<CGAL::Gmpq>" to "float" exists
> > > > >
> > > > > I am using the Intel 19.1 C++ compiler.
> > > > >
> > > > > Andrew
> > --
> > Andreas Fabri, PhD
> > Chief Officer, GeometryFactory
> > Editor, The CGAL Project
> >
> >
> > --
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