%% 
%%  Ein Beispiel der DANTE-Edition
%% 
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\setlength\parindent{0pt}
\StartShownPreambleCommands
\usepackage{pst-solides3d}
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-6,-4)(6,4)
\pstVerb{/Ampl 3 2 sqrt mul def}%
\psset{viewpoint=50 -10 30 rtp2xyz,Decran=50}
%\lightsource
\psset{lightsrc=viewpoint}
\psframe[fillstyle=solid,fillcolor=gray!50](-6,-4)(6,4)
\psSolid[object=datfile,file=data/tore1860lemniscate,
        hollow,
        rm=0 1,
        fillcolor=green!30,incolor=yellow!50]
\defFunction[algebraic]{lemniscate}(t){1.5}{Ampl*sin(t)/(1+cos(t)*cos(t))}{Ampl*sin(t)*cos(t)/(1+cos(t)*cos(t))}
\psSolid[object=courbe,r=0,linewidth=2pt,
        range=0 6.28,
        linecolor=red,
        function=lemniscate]%
\psSolid[object=plan,action=draw,
   definition=equation,
   args={[1 0 0 -1.5] 90},
   base=-5 5 -2 2,planmarks,showBase]
\end{pspicture}
\end{document}
