%% Ein Beispiel der DANTE-Edition

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%% Ein Beispiel der DANTE-Edition
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%% 7. Auflage
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%% Beispiel 00-00-1 auf Seite xi.
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%% Copyright (C) 2016 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.
%%
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% Show page(s) 1
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{193.16928pt}

%StartShownPreambleCommands
\usepackage{pst-solides3d}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-4,-5)(6,8)
\psset{lightsrc=viewpoint,viewpoint=50 60 30 rtp2xyz,Decran=60}
\psSurface[ngrid=0.15 0.15,incolor=yellow,linewidth=0.2\pslinewidth,
r = 2, fillcolor=cyan,
axesboxed, Zmin=0,Zmax=4](-1,-2)(1,2){
4 x dup mul mul y dup mul add dup 4 gt {pop 4} if }
\end{pspicture}
\end{document}