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%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 05-04-5 auf Seite 81.
%% 
%%  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{352.81416pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pstricks,pst-bspline,multido}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-.5,-.5)(6,5)
\pnodes{P}(0,1)(2,0)(5,2)(6,4)(4,5)(2,4)
\psBsplineNodesC*[showframe,linecolor=blue!30]{P}{5}
\psccurve[linecolor=red,showpoints](0,1)(2,0)(5,2)(6,4)(4,5)(2,4)
\multido{\i=0+1}{6}{\uput[20](P\i){P\i}}
\end{pspicture}
\begin{pspicture}(-.5,-.5)(6,5)
\pnodes{P}(0,1)(2,0)(5,2)(6,4)(4,5)(2,4)  \psBsplineInterpC{P}{5}
\psBsplineNodesC*[showframe=true,linecolor=blue!30]{PB}{5}
\psccurve[linecolor=red,showpoints](0,1)(2,0)(5,2)(6,4)(4,5)(2,4)
\multido{\i=0+1}{6}{\uput[20](P\i){P\i}} \multido{\i=0+1}{6}{\uput[20](PB\i){PB\i}}
\end{pspicture}
\end{document}