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## CGAL::Triangulation_vertex_base_with_info_2<Info,Traits,Vb>

### Definition

The class Triangulation_vertex_base_with_info_2<Info,Traits,Vb> is designed to be used as a base vertex class of a triangulation. It provides an easy way to add some user defined information in vertices.

#include <CGAL/Triangulation_vertex_base_with_info_2.h>

### Parameters

The first template parameter is the information the user would like to add to a vertex. It has to be DefaultConstructible and Assignable.

The second template parameter is the geometric traits class which provides the Point_2. It is strongly recommanded to instantiate this parameter with the traits class used for the triangulation. This ensures that the point type defined by Triangulation_vertex_base_with_info_2<Info,Traits,Vb> matches the point type defined by the triangulation.

The third template parameter is a vertex base class from which Triangulation_vertex_base_with_info_3 derives. By default this parameter is instantiated by CGAL::Triangulation_vertex_base_2<Traits>.

### Is Model for the Concept

The parameter Vb is a model of some vertex base concept. Triangulation_vertex_base_with_info_2<Info,Traits,Vb> derives from Vb and will be a model of the same vertex base concept : TriangulationVertexBase_2, or
RegularTriangulationVertexBase_2.

### Types

typedef Info | Info;

### Access Functions

const Info& | v.info () const | Returns a const reference to the object of type Info stored in the vertex.
Info& | v.info () | Returns a reference to the object of type Info stored in the vertex.

### See Also

CGAL::Triangulation_face_base_with_info_2<Info,Traits,Fb>
CGAL::Triangulation_vertex_base_2<Traits,Vb>
CGAL::Regular_triangulation_vertex_base_2<Traits,Vb>

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The CGAL Project . Tue, December 21, 2004 .