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%%
%% Ein Beispiel der DANTE-Edition
%%
%%
%% Copyright (C) 2010 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{190.324pt}
\setlength\parindent{0pt}
\usepackage[utf8]{inputenc}
\StartShownPreambleCommands
\usepackage{pst-thick,multido}
\def\Kreis(#1,#2)#3{% (x,y){Radius}
/xC #1 def /yC #2 def /x0 t cos #3 mul xC add def /y0 t sin #3 mul yC add def
/dx t dt add cos #3 mul xC add x0 sub def /dy t dt add sin #3 mul yC add y0 sub def }
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-4,-5)(3,5)
\psthick[E=1,linewidth=0.1]{45}{315}{\Kreis(-1,-1){3}}
\psthick[curveonly]{-45}{45}{\Kreis(-1,-1){3}} \psdot(-1,-1)
\pscircle[linestyle=dashed](-1,-1){3}
\multido{\i=-45+10}{10}{\pnode(!{ /t \i\space def /dt 1 def
\Kreis(-1,-1){3} /E 1 def /ds dx dup mul dy dup mul add sqrt def
/dx dx ds div def /dy dy ds div def /nx E 2 div dy mul neg def % normal x
/ny E 2 div dx mul def % normal y
x0 nx add y0 ny add }){A}
\psdot(A) \pnode(! x0 nx sub y0 ny sub ){B} \psdot(B) \psline(A)(B)}
\end{pspicture}
\end{document}
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