CGAL 5.1.3  2D Triangulation

#include <CGAL/Regular_triangulation_vertex_base_2.h>
Vb.
The class Regular_triangulation_vertex_base_2
is a model of the concept RegularTriangulationVertexBase_2
.
It is the default vertex base class of regular triangulations.
Traits  has to be a model of RegularTriangulationTraits_2 . 
Vb  has to be a model of the concept TriangulationVertexBase_2 and is by default instantiated by Triangulation_vertex_base_2<Traits> . 
CGAL::Triangulation_vertex_base_2<Traits,Vb>
CGAL::Regular_triangulation_2<Traits,Tds>
CGAL::Regular_triangulation_face_base_2<Traits,Fb>
Types  
typedef Traits::Weighted_point_2  Point 