
 
returns true iff the signed distance of p and l is smaller than the signed distance of q and l.  

 
returns true iff the signed distance of r and l is smaller than the signed distance of s and l, where l is the oriented line through p and q. 
CGAL::compare_distance_to_point
CGAL::compare_signed_distance_to_line
CGAL::compare_signed_distance_to_plane
CGAL::has_larger_distance_to_point
CGAL::has_larger_signed_distance_to_line
CGAL::has_larger_signed_distance_to_plane
CGAL::has_smaller_distance_to_point
CGAL::has_smaller_signed_distance_to_plane