*TriangulationFaceBase_2*

### Definition

The concept *TriangulationFaceBase_2* describes the requirements for
the base face class of a triangulation data structure
that is itself plugged into a basic triangulation
or a Delaunay triangulation.

This concept refines the concept *TriangulationDSFaceBase_2*
and could add geometric information. In fact,
currently the triangulations of
CGAL do not store any geometric information in the faces
and, thus this concept is just equal to *TriangulationDSFaceBase_2*
and only provided for symmetry with the vertex case.

### Refines

*TriangulationDSFaceBase_2*

### Has Models

*CGAL::Triangulation_face_base_2<Traits>*

### See Also

*TriangulationVertexBase_2*

*CGAL::Triangulation_face_base_2<Traits>*

*CGAL::Triangulation_2<Traits,Tds>*

*CGAL::Delaunay_triangulation_2<Traits,Tds>*