CGAL 5.6.1  3D Triangulations

#include <CGAL/Delaunay_triangulation_cell_base_with_circumcenter_3.h>
Cb.
The class Delaunay_triangulation_cell_base_with_circumcenter_3
derives from Cb
, a cell base class of a 3D triangulation.
It provides an easy way to cache the computation of the circumcenters of tetrahedra. Note that input/output operators discard this additional information.
All functions modifying the vertices of the cell invalidate the cached circumcenter.
Traits  is the geometric traits class and must be a model of DelaunayTriangulationTraits_3 . 
Cb  is a cell base class from which Delaunay_triangulation_cell_base_with_circumcenter_3 derives. Cb should be a model of DelaunayTriangulationCellBase_3 . It has the default value Delaunay_triangulation_cell_base_3<Traits> . 
Types  
typedef Traits::Point_3  Point 
Access function  
As a model of the concept If it has already been computed in the past, the cached value is returned.  
const Point &  circumcenter (Traits >=Traits()) const 
Computes the circumcenter of the tetrahedron, or retrieves it if already computed.  