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[Ramin H <>]

Hi everyone,
I want to find volume center of a cell from it's four vertices. I am averaging the x, y, and x coordinates and making a new Point_3 object but the compilation fails on:
Point_3 vol_center(x, y, z);

The error message is humongous so I am attaching it as compile_error.txt
The code follows.

What am I doing wrong?
-Ramin

===CODE===
template <typename Function, typename Tr, typename Visitor_>
class Parametric_cell_radius_criterion
  : public Abstract_criterion<Tr, Visitor_>
{
  typedef typename Tr::Cell_handle Cell_handle;
  typedef typename Tr::Geom_traits::FT FT;

   // more typedefs...

public:
  // Constructor & Destructor ...

protected:
  // some methods...

  virtual Badness do_is_bad(const Cell_handle& ch) const
  {
    typedef typename Tr::Point Point_3;

    const Point_3& p = ch->vertex(0)->point();
    const Point_3& q = ch->vertex(1)->point();
    const Point_3& r = ch->vertex(2)->point();
    const Point_3& s = ch->vertex(3)->point();

    // find volume center
    FT x = ( p.x() + q.x() + r.x() + s.x() ) / FT(4.0);
    FT y = ( p.y() + q.y() + r.y() + s.y() ) / FT(4.0);
    FT z = ( p.z() + q.z() + r.z() + s.z() ) / FT(4.0);

    // ===> The following line gives error <===
    Point_3 vol_center(x, y, z);

    // lablabla ...
  }
};

g++ -c -pipe -frounding-math -O3 -O2 -D_REENTRANT -Wall -W -DQT_NO_DEBUG 
-DQT_XML_LIB -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED 
-I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore 
-I/usr/include/qt4/QtGui -I/usr/include/qt4/QtOpenGL -I/usr/include/qt4/QtXml 
-I/usr/include/qt4 -I/usr/include -I../../CGAL-3.5/include 
-I/usr/X11R6/include -I. -o main.o main.cpp
In file included from ./CGAL_Ext/Mesh_cell_parametric_criteria_3.h:8,
                 from ./CGAL_Ext/Mesh_parametric_criteria_3.h:6,
                 from main.cpp:7:
./CGAL_Ext/mesh_parametric_cell_criteria.h: In member function ‘typename 
CGAL::Mesh_3::Abstract_criterion<Tr, Visitor_>::Badness 
CGAL::Mesh_3::Parametric_cell_radius_criterion<Function, Tr, 
Visitor_>::do_is_bad(const typename Tr::Cell_handle&) const [with Function = 
FT_to_point_function_wrapper<double, 
CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double> > > >, Tr 
= 
CGAL::Regular_triangulation_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, 
CGAL::Triangulation_data_structure_3<CGAL::Mesh_vertex_base_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, 
CGAL::Polyhedral_mesh_domain_3<CGAL::Polyhedron_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>,
 CGAL::Polyhedron_items_3, CGAL::HalfedgeDS_default, std::allocator<int> >, 
CGAL::Mesh_3::Robust_intersection_traits_3<K>, 
CGAL::Triangle_accessor_3<CGAL::Polyhedron_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>,
 CGAL::Polyhedron_items_3, CGAL::HalfedgeDS_default, std::allocator<int> >, 
CGAL::Mesh_3::Robust_intersection_traits_3<K> > >, 
CGAL::Triangulation_vertex_base_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, CGAL::Triangulation_ds_vertex_base_3<void> > >, 
CGAL::Mesh_cell_base_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, 
CGAL::Polyhedral_mesh_domain_3<CGAL::Polyhedron_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>,
 CGAL::Polyhedron_items_3, CGAL::HalfedgeDS_default, std::allocator<int> >, 
CGAL::Mesh_3::Robust_intersection_traits_3<K>, 
CGAL::Triangle_accessor_3<CGAL::Polyhedron_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>,
 CGAL::Polyhedron_items_3, CGAL::HalfedgeDS_default, std::allocator<int> >, 
CGAL::Mesh_3::Robust_intersection_traits_3<K> > >, 
CGAL::Regular_triangulation_cell_base_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, 
CGAL::Triangulation_cell_base_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, CGAL::Triangulation_ds_cell_base_3<void> >, 
std::list<CGAL::Weighted_point<CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>
 > >, double>, 
std::allocator<CGAL::Weighted_point<CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>
 > >, double> > > > > > >, Visitor_ = 
CGAL::Mesh_3::Cell_criterion_visitor<CGAL::Regular_triangulation_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, 
CGAL::Triangulation_data_structure_3<CGAL::Mesh_vertex_base_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, 
CGAL::Polyhedral_mesh_domain_3<CGAL::Polyhedron_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>,
 CGAL::Polyhedron_items_3, CGAL::HalfedgeDS_default, std::allocator<int> >, 
CGAL::Mesh_3::Robust_intersection_traits_3<K>, 
CGAL::Triangle_accessor_3<CGAL::Polyhedron_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>,
 CGAL::Polyhedron_items_3, CGAL::HalfedgeDS_default, std::allocator<int> >, 
CGAL::Mesh_3::Robust_intersection_traits_3<K> > >, 
CGAL::Triangulation_vertex_base_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, CGAL::Triangulation_ds_vertex_base_3<void> > >, 
CGAL::Mesh_cell_base_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, 
CGAL::Polyhedral_mesh_domain_3<CGAL::Polyhedron_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>,
 CGAL::Polyhedron_items_3, CGAL::HalfedgeDS_default, std::allocator<int> >, 
CGAL::Mesh_3::Robust_intersection_traits_3<K>, 
CGAL::Triangle_accessor_3<CGAL::Polyhedron_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>,
 CGAL::Polyhedron_items_3, CGAL::HalfedgeDS_default, std::allocator<int> >, 
CGAL::Mesh_3::Robust_intersection_traits_3<K> > >, 
CGAL::Regular_triangulation_cell_base_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, 
CGAL::Triangulation_cell_base_3<CGAL::Robust_weighted_circumcenter_filtered_traits_3<CGAL::Regular_triangulation_filtered_traits_3<CGAL::Mesh_3::Robust_intersection_traits_3<K>
 > >, CGAL::Triangulation_ds_cell_base_3<void> >, 
std::list<CGAL::Weighted_point<CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>
 > >, double>, 
std::allocator<CGAL::Weighted_point<CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>
 > >, double> > > > > > > >]’:
main.cpp:68:   instantiated from here
./CGAL_Ext/mesh_parametric_cell_criteria.h:72: error: no matching function 
for call to 
‘CGAL::Weighted_point<CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>
 > >, double>::Weighted_point(double&, double&, double&)’
../../CGAL-3.5/include/CGAL/Weighted_point.h:43: note: candidates are: 
CGAL::Weighted_point<Pt, We>::Weighted_point(const Pt&, const We&) [with Pt = 
CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double> > >, We = 
double]
../../CGAL-3.5/include/CGAL/Weighted_point.h:37: note:                 
CGAL::Weighted_point<Pt, We>::Weighted_point(const Pt&) [with Pt = 
CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double> > >, We = 
double]
../../CGAL-3.5/include/CGAL/Weighted_point.h:33: note:                 
CGAL::Weighted_point<Pt, We>::Weighted_point() [with Pt = 
CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double> > >, We = 
double]
../../CGAL-3.5/include/CGAL/Weighted_point.h:28: note:                 
CGAL::Weighted_point<CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>
 > >, double>::Weighted_point(const 
CGAL::Weighted_point<CGAL::Point_3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>
 > >, double>&)
make: *** [main.o] Errot 1