Function

CGAL::theta_extremal_point

#include <CGAL/global_functions_spherical_kernel_3.h>

Circular_arc_point_3<SphericalKernel>
theta_extremal_point ( Circle_3<SphericalKernel> c,
const Sphere_3<SphericalKernel> sphere,
bool b)
Returns the point on the circle that is extremal in theta using the cylindrical coordinate system relative to sphere, and that has the smallest (resp. largest) theta-coordinate of the two points if b is true (resp. false). See section 14.2 for definitions.
Precondition: c lies on sphere and is a normal circle.