CGAL 5.1.3  2D and 3D Linear Geometry Kernel

AdaptableFunctor
(with three arguments)Operations  
bool  operator() (const Kernel::Point_3 &p, const Kernel::Point_3 &q, const Kernel::Point_3 &r) 
returns true , iff the three points are collinear and q lies strictly between p and r . More...  
bool Kernel::AreStrictlyOrderedAlongLine_3::operator()  (  const Kernel::Point_3 &  p, 
const Kernel::Point_3 &  q,  
const Kernel::Point_3 &  r  
) 
returns true
, iff the three points are collinear and q
lies strictly between p
and r
.
Note that false
is returned, if q==p
or q==r
.