\begin{ccRefFunction}{collinear}
\ccInclude{CGAL/predicates_on_points_2.h}

\ccFunction{bool collinear(const Point_2<R> &p, 
                           const Point_2<R> &q, 
                           const Point_2<R> &r);}
{returns \ccStyle{true}, iff $p$, $q$, and $r$ are collinear.}

\ccInclude{CGAL/predicates_on_points_3.h}

\ccFunction{bool collinear(const Point_3<R> &p,
                           const Point_3<R>&q,
                           const Point_3<R>&r);}
{returns \ccStyle{true}, iff $p$, $q$, and $r$ are collinear.}
\end{ccRefFunction}