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%%
%% Ein Beispiel der DANTE-Edition
%%
%% 7. Auflage
%%
%% Beispiel 13-04-1 auf Seite 177.
%%
%% Copyright (C) 2016 Herbert Voss
%%
%% 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.
%%
%%
%% ====
% Show page(s) 1
%%
%%
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pstricks,pst-xkey}
\makeatletter
\define@boolkey[psset]{}[Pst@]{HRInnen}[true]{}
\psset{HRInnen=false,unit=0.7}% unit nur wegen Buch
\def\psHexagon{\pst@object{psHexagon}}
\def\psHexagon@i{\@ifnextchar({\psHexagon@ii}{\psHexagon@ii(0,0)}}% MP angegeben?
\def\psHexagon@ii(#1)#2{%
\begin@ClosedObj% closed object
\pst@@getcoor{#1}% hole Mittelpunkt
\pssetlength\pst@dimc{#2}% setze Radius auf pt
\addto@pscode{% PostScript
\pst@coor T % xM yM neuer Ursprung
\psk@dimen CLW mul % Liniendicke setzen
/Radius \pst@number\pst@dimc\space % Radius speichern
\ifPst@HRInnen\space 3 sqrt 2 div div \fi def % innen?
/angle \ifPst@HRInnen 30 \else 0 \fi def % Anfangswinkel
Radius angle PtoC moveto % gehe zum ersten Punkt
6 {/angle angle 60 add def % alpha := alpha+60
Radius angle PtoC L % Linie zum naechsten Punkt
} repeat % Wiederhole
closepath }% closed object / end pscode
\def\pst@linetype{3}% Linientyp festlegen
\showpointsfalse% keine Stuetzpunkte zeigen
\end@ClosedObj\ignorespaces}% Spaces schlucken
\makeatother
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}[showgrid=true](-3,-3)(3,3)
\psHexagon[linewidth=3pt,linecolor=red]{2.5}
\pscircle[linestyle=dashed,linecolor=red]{2.5}
\psHexagon[linewidth=3pt,linecolor=blue,HRInnen=true]{2.5}
\pscircle[linestyle=dashed,linecolor=blue]{2.17}
\end{pspicture}\hspace{1cm}
\begin{pspicture}[showgrid=true](-3,-3)(3,3)
\psHexagon[doubleline=true](2,2){1}
\psHexagon*[linecolor=gray!15,HRInnen=true](2,-2){1}
\psHexagon[doubleline=true,doublesep=0.5,linecolor=magenta]{2}
\psHexagon*(-2.5,2.5){0.5}\psHexagon[border=3pt,HRInnen=true](-1,-1){2}
\end{pspicture}
\end{document}
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