%% 
%%  Ein Beispiel der DANTE-Edition
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%%  7. Auflage
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%%  Beispiel 22-05-54 auf Seite 411.
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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.
%% 
%% 
%% ==== 
% Show page(s) 1
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{169.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pstricks,pst-3dplot}
%StopShownPreambleCommands
\begin{document}
\psset{unit=2cm,Beta=10,Alpha=60}
\begin{pspicture}(-1.25,-1.2)(1,1.2)
\pstThreeDCoor[xMax=2.5,yMax=2.5,
 zMax=2.5,drawing=false]
\pstThreeDBox(1,1,-1)(-2,0,0)(0,-2,0)(0,0,2)
\psplotThreeD[linecolor=blue,
 drawStyle=xyLines](-1,1)(-1,1){x 2 exp y mul}
\psplotThreeD[linecolor=red,
 drawStyle=yLines](-1,1)(-1,1){x 2 exp y mul}
\end{pspicture}
\end{document}