Kernel::SideOfOrientedCircle_2

Oriented_side	fo.operator() ( Kernel::Point_2 p, Kernel::Point_2 q, Kernel::Point_2 r, 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. Precondition: p, q and r are not collinear.

Refines

See Also