CGAL 5.5  2D and 3D Linear Geometry Kernel

AdaptableFunctor
(with three arguments)Operations  
bool  operator() (const Kernel::Point_2 &p, const Kernel::Point_2 &q, const Kernel::Point_2 &r) 
returns true iff the three points p , q and r form a left turn or if they are collinear and the distance of q to p is larger than the distance of r to p , where p is the point passed to the object at construction. More...  
bool Kernel::LessRotateCCW_2::operator()  (  const Kernel::Point_2 &  p, 
const Kernel::Point_2 &  q,  
const Kernel::Point_2 &  r  
) 
returns true iff the three points p
, q
and r
form a left turn or if they are collinear and the distance of q
to p
is larger than the distance of r
to p
, where p
is the point passed to the object at construction.
p
does not lie in the interior of the segment rq
, i.e. p
is an extreme point with respect to \( \{p,q,r\}\).