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 using the cylindrical coordinate system relative to sphere, and that has the smallest (resp. largest) -coordinate of the two points if b is true (resp. false). See section 12.2 for definitions. Precondition:  c lies on sphere and is a normal circle.