%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-2-21 on page 344.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  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.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{135.83385pt}
\newcommand*\showInfo{%
  \nput[labelsep=0]{-70}{A}{%
     \psarcn(0,0){.4cm}{0}{-70}
     \uput{.4cm}[-35](0,0){\texttt{angleA}}}
  \nput[labelsep=10pt]{60}{B}{\texttt{armB}}
  \ncput[nrot=:U,npos=1]{\psframe[dimen=middle](0,0)(.35,.35)}
}
\StartShownPreambleCommands
\usepackage{pstricks,pst-node}
% \showInfo defined in example code to display
% angle and arm info
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}(4,3)
  \rput[tl](0,3){\rnode{A}{\psframebox{node A}}}
  \rput[br](4,0){\ovalnode{B}{node B}}
  \ncangle[angleA=-70,angleB=90,armB=1cm,
           linewidth=1.2pt]{A}{B}
  \showInfo % see example code
\end{pspicture}
\end{document}
