CGAL::y_extremal_point

#include <CGAL/global_functions_spherical_kernel_3.h>

Circular_arc_point_3<SphericalKernel>
y_extremal_point ( Sphere_3<SphericalKernel> c, bool b)
Returns the point on the sphere that is extremal in the y-direction, and that is the smallest (resp. largest) of the two y-extremal points for the lexicographic order if b is true (resp. false).

Circular_arc_point_3<SphericalKernel>
y_extremal_point ( Circle_3<SphericalKernel> c, bool b)
Same for a circle.
Precondition: The circle is not contained in a plane orthogonal to the y-axis.