%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-7-22 on page 431.
%% 
%%  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{207.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks,pst-poly}
\StopShownPreambleCommands
\begin{document}
\providecommand{\PstPolygonNode}{%
  \psdots[dotstyle=o,dotsize=0.2](1;\INode)
  \psline[linecolor=red]{->}(0.9;\INode)}
  \PstPolygon[unit=2,PolyNbSides=8]
\end{document}