CGAL 5.5  2D and 3D Linear Geometry Kernel

Functions  
template<typename Kernel >  
Kernel::FT  CGAL::l_infinity_distance (const CGAL::Point_2< Kernel > &p, const CGAL::Point_2< Kernel > &q) 
returns the distance between p and q in the Linfinity metric.  
template<typename Kernel >  
Kernel::FT  CGAL::l_infinity_distance (const CGAL::Point_3< Kernel > &p, const CGAL::Point_3< Kernel > &q) 
returns the distance between p and q in the Linfinity metric.  