%% 
%%  A DANTE-Edition example
%% 
%%  Example C-03-1 on page 849.
%% 
%%  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[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{pst-node}\SpecialCoor

\begin{document}
\begin{pspicture}(5.5,3)
  \qdisk(5,0){2mm} \qdisk(0,2){2mm}\rput(1,1){\psline[linewidth=2pt](5,0)(0,2)}% correct
\end{pspicture}\quad\begin{pspicture}(5.5,2)
  \Cnode*(5,0){f1} \Cnode*(0,2){f2}
  \rput(1,1){\psline[linewidth=2pt](f1)(f2)}% wrong, \rput witout effect
\end{pspicture}
\end{document}