CGAL 5.1.3  3D Mesh Generation

#include <CGAL/Mesh_cell_base_3.h>
Cb.
The class Mesh_cell_base_3<Gt, MD, Cb>
is a model of the concept MeshCellBase_3
.
It is designed to serve as cell base class for the 3D triangulation used in the 3D mesh generation process.
Gt  is the geometric traits class. It has to be a model of the concept MeshTriangulationTraits_3 . 
MD  provides the types of indices used to identify the faces of the input complex. It has to be a model of the concept MeshDomain_3 . 
Cb  is the cell base class. It has to be a model of the concept RegularTriangulationCellBaseWithWeightedCircumcenter_3 and defaults to Regular_triangulation_cell_base_with_weighted_circumcenter_3<Gt> . 
CGAL::Mesh_complex_3_in_triangulation_3<Tr,CornerIndex,CurveIndex>
CGAL::Compact_mesh_cell_base_3<Gt, MD, Tds>