CGAL 5.1.3 - 2D and 3D Linear Geometry Kernel

See also
CGAL::collinear()
CGAL::orientation()
CGAL::right_turn()

Functions

template<typename Kernel >
bool CGAL::left_turn (const CGAL::Point_2< Kernel > &p, const CGAL::Point_2< Kernel > &q, const CGAL::Point_2< Kernel > &r)
 returns true iff p, q, and r form a left turn.