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

\ccFunction{Comparison_result compare_y(const Point_2<R> &p,
                            	        const Point_2<R> &q);}
	{compares Cartesian $y$-coordinates of $p$ and $q$.}

\ccInclude{CGAL/predicates_on_points_3.h}

\ccFunction{Comparison_result compare_y(const Point_3<R> &p,
                            	        const Point_3<R> &q);}
	{compares Cartesian $y$-coordinates of $p$ and $q$.}

\ccInclude{CGAL/predicates_on_lines_2.h}

\begin{ccHtmlOnly}
<img border=0 src=./compare1.gif align=center alt="Comparison of the x 
or y coordinates of the (implicitly given) points in the boxes">
\end{ccHtmlOnly} 

\begin{ccTexOnly}
\begin{figure}[hb]
\centerline{\Ipe{compare1.ipe}}
\caption{Comparison of the $x$ or $y$-coordinates of the (implicitly
given) points in the boxes.\label{fig-compare13}}
\end{figure} 
\end{ccTexOnly} 

\ccFunction{Comparison_result compare_y(const Point_2<R> &p,
                                        const Line_2<R> &l1,
                                        const Line_2<R> &l2);}
        {compares the $y$-coordinates of $p$ and the \ccHtmlNoLinksFrom{intersection} of lines
         $l1$ and $l2$%
         \ccTexHtml{ (Figure~\ref{fig-compare13} (a))}{, see (a) in the figure 
         above}.}


\ccFunction{Comparison_result compare_y(const Line_2<R> &l,
                                        const Line_2<R> &h1,
                                        const Line_2<R> &h2);}
        {compares the $y$-coordinates of the \ccHtmlNoLinksFrom{intersection} of line $l$
         with line $h1$ and with line $h2$%
         \ccTexHtml{ (Figure~\ref{fig-compare13} (b))}{, see (b) in the figure 
         above}.}


\ccFunction{Comparison_result compare_y(const Line_2<R> &l1,
                                        const Line_2<R> &l2,
                                        const Line_2<R> &h1,
                                        const Line_2<R> &h2);}
        {compares the $y$-coordinates of the \ccHtmlNoLinksFrom{intersection} of lines $l1$
         and $l2$ and  the \ccHtmlNoLinksFrom{intersection} of lines $h1$ and $h2$ 
         \ccTexHtml{ (Figure~\ref{fig-compare13} (c))}{, see (c) in the figure 
         above}.}

\end{ccRefFunction}