CGAL 5.1.3  2D and 3D Linear Geometry Kernel

#include <CGAL/Origin.h>
CGAL defines a symbolic constant ORIGIN
which denotes the point at the origin.
Origin
is the type of this constant. It is used in the conversion between points and vectors.
CGAL::Point_2<Kernel>
CGAL::Point_3<Kernel>
CGAL::Vector_2<Kernel>
CGAL::Vector_3<Kernel>
CGAL::operator+
CGAL::operator