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%%
%% Ein Beispiel der DANTE-Edition
%%
%% 2. Auflage
%%
%% Beispiel 15-02-11 auf Seite 720.
%%
%% 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
%%
defaultfont:="ptmr8r";
warningcheck:=0;
% --- start of displayed preamble in the book ---
% --- end of displayed preamble in the book ---
% %
beginfig(1)
u:=1cm;
pair A,AA,B,BB,C,D;
A :=( 0.2u, 0.05u); AA :=(0.2u,-0.05u);
B :=( u, 0.05u); BB :=( u,-0.05u);
C :=(-0.02u, 0); D :=( -u, 0);
path p;
p:= B{up}..D{down}..BB{up}--AA{down}..
C{up}..A{down}--cycle;
fill p withcolor 0.6*white;
draw p withpen pencircle scaled 1.5bp
withcolor 0.5*red;
endfig;
end;
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