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CGAL::z_extremal_point

#include <CGAL/global_functions_spherical_kernel_3.h>

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

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

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CGAL Open Source Project. Release 3.6.1. 29 June 2010.