%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 7-4-29 on page 499.
%% 
%%  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{183.83385pt}
\StartShownPreambleCommands
\usepackage[all,poly]{xy}
\StopShownPreambleCommands
\begin{document}
\[\begin{xy} /r10mm/:,
  {\xypolygon4"F"{\dir{*}}}
 ,+(.8,1.0),{\xypolygon4"B"{\dir{*}}}
 ,"F1";"B1"**@{-},"F2";"B2"**@{-}
 ,"F3";"B3"**@{-},"F4";"B4"**@{-}
 ,-(1.0,2.8)
 ,{\xypolygon10"O"{~={18}\dir{*}}}
 ,{\xypolygon5"I"{~:{(0.55,0):}
      ~={18}{\dir{*}}}}
 ,"O1";"I1"**@{.},"O3";"I2"**@{.}
 ,"O5";"I3"**@{.},"O7";"I4"**@{.}
 ,"O9";"I5"**@{.}
\end{xy}\]
\end{document}
