\ccHtmlNoRefLinks
\begin{ccRefFunction}{orientation}
\ccInclude{CGAL/predicates_on_points_2.h}

\ccHtmlNoLinks
\ccFunction{Orientation orientation(const Point_2<R>& p,
                                    const Point_2<R>& q,
                                    const Point_2<R>& r);}
{returns \ccStyle{LEFTTURN}, if $r$ lies to the left of the oriented 
line $l$ defined by $p$ and $q$, returns \ccStyle{RIGHTTURN} if $r$ 
lies to the right of $l$, and returns \ccStyle{COLLINEAR} if $r$ lies
on $l$.}

\ccInclude{CGAL/predicates_on_points_3.h}

\ccHtmlNoLinks
\ccFunction{Orientation orientation(const Point_3<R> &p,
                                   const Point_3<R>&q,
                                   const Point_3<R>&r,
                                   const Point_3<R>&s);}
{returns \ccStyle{POSITIVE}, if $s$ lies on the positive side of the oriented 
plane $h$ defined by $p$, $q$, and $r$, returns \ccStyle{NEGATIVE} if $s$ 
lies on the negative side of $h$, and returns \ccStyle{COPLANAR} if $s$ lies
on $h$.}
\end{ccRefFunction}