%%
%% A DANTE-Edition example
%%
%% Example 36-00-78 on page 800.
%%
%% Copyright (C) 2011 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[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}
\usepackage{pst-solides3d}
\begin{document}
\begin{pspicture}(-6,-4)(6,4)
\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]
\pstVerb{/Ampl 3 2 sqrt mul def}%
\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}
