## 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>