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%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-2-22 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]{-90}{A}{%
    \psarcn(0,0){.4cm}{0}{-90}
    \uput{.4cm}[-45](0,0){\texttt{angleA}}
    \rput[tr](-2pt,0){\texttt{armA}}}
  \nput[labelsep=0]{135}{B}{%
    \psarc(0,0){.4cm}{0}{133}
    \uput{.4cm}[50.5](0,0){\texttt{angleB}}}
  \ncput[nrot=:L,npos=2]{\psline(0,-0.35)(-0.35,-0.35)(-0.35,0)}
  \ncput[npos=3.5,labelsep=10pt]{\texttt{armB}}
}
\StartShownPreambleCommands
\usepackage{pstricks,pst-node}
% \showInfo defined in example code to display
% angle and arm info
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}(4,4)
  \rput[tl](0,4){\rnode{A}{\psframebox{node A}}}
  \rput[br](4,0){\ovalnode{B}{node B}}
  \ncangles[angleA=-90,angleB=135,armA=1cm,armB=.5cm,
     linearc=.15]{A}{B}
  \showInfo % see example code
\end{pspicture}
\end{document}