Added "See also" reference to PyOpenGL.
diff --git a/Doc/lib/libgl.tex b/Doc/lib/libgl.tex
index 0c0f578..615504a 100644
--- a/Doc/lib/libgl.tex
+++ b/Doc/lib/libgl.tex
@@ -48,13 +48,13 @@
\begin{verbatim}
lmdef(deftype, index, np, props)
\end{verbatim}
-%
+
is translated to Python as
\begin{verbatim}
lmdef(deftype, index, props)
\end{verbatim}
-%
+
\item
Output arguments are omitted from the argument list; they are
transmitted as function return values instead.
@@ -67,13 +67,13 @@
\begin{verbatim}
getmcolor(i, &red, &green, &blue)
\end{verbatim}
-%
+
is translated to Python as
\begin{verbatim}
red, green, blue = getmcolor(i)
\end{verbatim}
-%
+
\end{itemize}
The following functions are non-standard or have special argument
@@ -188,6 +188,16 @@
\end{verbatim}
+\begin{seealso}
+ \seetext{An interface to OpenGL\index{OpenGL} is also available; see
+ information about David Ascher's\index{Ascher, David}
+ \strong{PyOpenGL}\index{PyOpenGL} online at
+ \url{http://starship.python.net/crew/da/PyOpenGL/}. This may
+ be a better option if support for SGI hardware from before about
+ 1996 is not required.}
+\end{seealso}
+
+
\section{\module{DEVICE} ---
Constants used with the \module{gl} module}