CGAL::operator-

Vector_2<Kernel>	operator- ( Point_2<Kernel> p, Point_2<Kernel> q)
		returns the difference vector between q and p. You can substitute ORIGIN for either p or q ,but not for both.
Point_2<Kernel>	operator- ( Point_2<Kernel> p, Vector_2<Kernel> v)
		returns the point obtained by translating p by the vector -v.
Vector_3<Kernel>	operator- ( Point_3<Kernel> p, Point_3<Kernel> q)
		returns the difference vector between q and p. You can substitute ORIGIN for either $$p or $$q, but not both.
Point_3<Kernel>	operator- ( Point_3<Kernel> p, Vector_3<Kernel> v)
		returns a point obtained by translating p by the vector $$-v.

See Also