CGAL users discussion list

["Laurent Rineau (GeometryFactory)" <>]

Le mercredi 07 octobre 2009 23:20:19, Gilles Kneuss a écrit :
> Re-hello,
> 
> my last reply was not as clear as it should be :
> 
> DT2<Gt>* heritage=new DT2<Gt>();
> 
> or
> 
> DT2<K,Gt>* heritage=new DT2<Gt>();
> 
> Give the same compile problems (the first error is) :
> 
> "main.cpp:23: erreur: wrong number of template arguments (1, should be 2)"
> 
> Any other ideas ?

See what you wrote:

> >> > template <class kernel, class TDS>
> >> > class DT2 : public CGAL::Delaunay_triangulation_2<kernel,TDS>

DT2 is template by kernel *and* TDS. You need to pass a TDS as argument.

I suggest the following:

typedef CGAL::Triangulation_data_structure_2 <
                           CGAL::Triangulation_vertex_base_2<Gt> > TDS;

typedef DT2<Gt, TDS> Tr;

Tr* heritage = new Tr;

Another possibility would have been:

template <class Kernel>
class DT2 : public CGAL::Delaunay_triangulation_2<Kernel> {
  // ...
};

and DT2<Gt>.

The reason is that the second template argument of 
CGAL::Delaunay_triangulation_2 has a default value, which is 
CGAL::Triangulation_data_structure_2<CGAL::Triangulation_vertex_base_2<Gt> >

-- 
Laurent Rineau, PhD
Release Manager of the CGAL Project
http://www.cgal.org/
R&D Engineer at GeometryFactory
http://www.geometryfactory.com/