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%%
%% Ein Beispiel der DANTE-Edition
%%
%% 2. Auflage
%%
%% Beispiel 15-03-20 auf Seite 757.
%%
%% 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
%%
%%
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{145.16928pt}
\setlength\parindent{0pt}
\usepackage[utf8]{inputenc}
%StartShownPreambleCommands
\usepackage{pst-solides3d}
%StopShownPreambleCommands
\begin{document}
\psset{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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