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%%
%% A DANTE-Edition example
%%
%%
%% 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{105.70511pt}
\setlength\parindent{0pt}
\usepackage{pst-solides3d}
\psset{lightsrc=10 5 20,viewpoint=50 -20 30 rtp2xyz,Decran=25}
\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}
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