%% %% Ein Beispiel der DANTE-Edition %% %% 2. Auflage %% %% Beispiel 15-02-14 auf Seite 721. %% %% 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 := 1.25cm; for i=0 step 0.5 until 360: pair P; farbe := i/360; P = 1u*(sind(3*i), cosd(2*i)); fill fullcircle scaled 2mm shifted P withcolor white; draw fullcircle scaled 2mm shifted P withcolor if farbe>0.5: (2*(1-farbe)) [red, blue] else: (1-2farbe) [blue, red] fi; endfor; endfig; end;