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CGAL::collinear

bool collinear ( Point_2<R> p, Point_2<R> q, Point_2<R> r)
returns true, iff p, q, and r are collinear.

bool collinear ( Point_3<R> p, Point_3<R> q, Point_3<R> r)
returns true, iff p, q, and r are collinear.

See Also

CGAL::leftturn
CGAL::orientation
CGAL::rightturn

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www.cgal.org. Aug 13, 2001.