<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Dear Herbert,<br>
<br>
<blockquote cite="mid:4740B6A3.9060107@fu-berlin.de" type="cite">
<blockquote type="cite">
<pre wrap="">but didn't look really nice ...
</pre>
</blockquote>
<pre wrap=""><!---->
looks better
</pre>
</blockquote>
forgive me the dirty trick -- but try this one:<br>
<br>
\documentclass{article}<br>
\usepackage{pst-3dplot}<br>
\begin{document}<br>
\psset{Beta=20}<br>
\begin{pspicture}(-4,-4)(4,4)<br>
\def\Radius{5}<br>
\parametricplotThreeD[plotstyle=line,xPlotpoints=100,yPlotpoints=100,drawStyle=xyLines,linecolor=gray](0,360)(-1,1){<br>
t 2 div cos u mul \Radius add t cos mul<br>
t 2 div cos u mul \Radius add t sin mul<br>
t 2 div sin u mul }<br>
%\pstThreeDCoor[xMin=-1,yMin=-1,zMin=-1]<br>
\parametricplotThreeD[xPlotpoints=100,yPlotpoints=1,<br>
linecolor=red,linewidth=2pt](180,-180){<br>
t 2 div cos \Radius add t cos mul<br>
t 2 div cos \Radius add t sin mul<br>
t 2 div sin }<br>
\end{pspicture}<br>
\end{document}<br>
<br>
Regards,<br>
<br>
Juergen<br>
<pre class="moz-signature" cols="65">--
jürgen gilg
austr. 59
70376 stuttgart
tel 0711-59 27 88
e-mail <a class="moz-txt-link-abbreviated" href="mailto:gilg@acrotex.net">gilg@acrotex.net</a>
website <a class="moz-txt-link-abbreviated" href="http://www.acrotex.net">www.acrotex.net</a>
<a class="moz-txt-link-abbreviated" href="http://www.gilligan-online.de">www.gilligan-online.de</a>
<a class="moz-txt-link-abbreviated" href="http://www.brueckenkurs-physik.de">www.brueckenkurs-physik.de</a></pre>
</body>
</html>