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%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 5-15-5 on page 308.
%%
%% 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{159.83385pt}
%
\usepackage{pst-xkey}
\makeatletter
\newif\ifHRInner
\def\psset@HRInner#1{\@nameuse{HRInner#1}}
\psset@HRInner{false}
%
\def\psHexagon{\pst@object{psHexagon}}
\def\psHexagon@i{%
\@ifnextchar({\psHexagon@ii}{\psHexagon@ii(0,0)}% specify center? )
}
\def\psHexagon@ii(#1)#2{%
\begin@ClosedObj% closed object
\pst@@getcoor{#1}% get center
\pssetlength\pst@dimc{#2}% set radius to pt
\addto@pscode{% PostScript
\pst@coor T % xM yM new origin
\psk@dimen CLW mul % set line width
/Radius \pst@number\pst@dimc\space % save radius
\ifHRInner\space 3 sqrt 2 div div \fi def % inner?
/angle \ifHRInner 30 \else 0 \fi def % starting angle
Radius angle PtoC moveto % go to first point
6 { % 6 iterations
/angle angle 60 add def % alpha = alpha+60
Radius angle PtoC L % line to next point
} repeat
closepath % closed object
}%
\def\pst@linetype{3}% set linetype
\showpointsfalse% do not show base points
\end@ClosedObj% end
\ignorespaces% swallow spaces
}
\makeatother
\StartShownPreambleCommands
\usepackage{pstricks}
% \psHexagon as defined above
\StopShownPreambleCommands
\begin{document}
\psset{unit=7mm}
\begin{pspicture}(-3,-3)(3,3)
\psHexagon[linewidth=3pt,linecolor=red]{2.5}
\pscircle[linestyle=dashed,linecolor=red]{2.5}
%
\psHexagon[linewidth=3pt,linecolor=blue,%
HRInner=true]{2.5}
\pscircle[linestyle=dashed,linecolor=blue]{2.17}
\end{pspicture}
\end{document}
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