Kernel::SideOfOrientedCircle_2 Concept Reference

Definition

Refines

AdaptableQuaternaryFunction

See also

CGAL::side_of_oriented_circle()

Operations
A model of this concept must provide:
Oriented_side	operator() (const Kernel::Point_2 &p, const Kernel::Point_2 &q, const Kernel::Point_2 &r, const Kernel::Point_2 &t)
	returns the relative position of point t to the oriented circle defined by p, q and r.

Member Function Documentation

operator()()

Oriented_side Kernel::SideOfOrientedCircle_2::operator()	(	const Kernel::Point_2 &	p,
		const Kernel::Point_2 &	q,
		const Kernel::Point_2 &	r,
		const Kernel::Point_2 &	t
	)

returns the relative position of point t to the oriented circle defined by p, q and r.

The order of the points p, q and r is important, since it determines the orientation of the implicitly constructed circle.

If p, q and r are collinear, the circle degenerates in a line. CGAL::ON_ORIENTED_BOUNDARY is returned if t is also collinear or if two points are identical, otherwise, side_of_oriented_circle(r, q, t, p) is returned.