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+%%
+%% 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{94.324pt}
+\setlength\parindent{0pt}
+\usepackage{pst-solides3d}
+\psset{lightsrc=10 5 20,viewpoint=50 -20 30 rtp2xyz,Decran=25}
+
+\StartShownPreambleCommands
+
+\StopShownPreambleCommands
+\begin{document}
+\psset[pst-solides3d]{viewpoint=100 50 20 rtp2xyz,Decran=60,lightsrc=10 15 10}
+\defFunction[algebraic]{corne}(u,v){(2 + u*cos(v))*sin(2*pi*u)}{(2 + u*cos(v))*cos(2*pi*u) + 2*u}{u *sin(v)}
+\begin{pspicture}(-2,-2)(2,2)
+\psSolid[object=surfaceparametree,base=0 1 0 2 pi mul,function=corne,ngrid=20]
+\end{pspicture}
+\end{document}