CGAL::side_of_bounded_sphere

Bounded_side	side_of_bounded_sphere ( Point_3<R> p, Point_3<R> q, Point_3<R> r, Point_3<R> s, Point_3<R> t)
		returns the relative position of point t to the sphere defined by $$p, $$q, $$r, and $$s. The order of the points $$p, $$q, $$r, and $$s does not matter. Precondition: p, q, r and s are not coplanar.
Bounded_side	side_of_bounded_sphere ( Point_3<R> p, Point_3<R> q, Point_3<R> r, Point_3<R> t)
		returns the position of the point t relative to the sphere passing through $$p, $$q, and $$r and whose center is in the plane defined by these three points.
Bounded_side	side_of_bounded_sphere ( Point_3<R> p, Point_3<R> q, Point_3<R> t)
		returns the position of the point t relative to the sphere that has $$pq as its diameter.

See Also

CGAL::side_of_oriented_sphere