%% 
%%  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{214.324pt}
\setlength\parindent{0pt}
\StartShownPreambleCommands
\usepackage{pstricks,pst-bspline}
\StopShownPreambleCommands
\begin{document}
\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,
  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}{5}{\uput[20](P\i){P\i}}
\multido{\i=0+1}{5}{\uput[20](PB\i){PB\i}}
\end{pspicture}
\end{document}