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%%%% dodec_01.ldf
%%%% Created by Laurence D. Finston (LDF) Thu Sep 27 17:57:57 CEST 2007
%% * (1) Copyright and License.
%%%% This file is part of GNU 3DLDF, a package for three-dimensional drawing.
%%%% Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
%%%% GNU 3DLDF is free software; you can redistribute it and/or modify
%%%% it under the terms of the GNU General Public License as published by
%%%% the Free Software Foundation; either version 3 of the License, or
%%%% (at your option) any later version.
%%%% GNU 3DLDF is distributed in the hope that it will be useful,
%%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
%%%% GNU General Public License for more details.
%%%% You should have received a copy of the GNU General Public License
%%%% along with GNU 3DLDF; if not, write to the Free Software
%%%% Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
%%%% GNU 3DLDF is a GNU package.
%%%% It is part of the GNU Project of the
%%%% Free Software Foundation
%%%% and is published under the GNU General Public License.
%%%% See the website http://www.gnu.org
%%%% for more information.
%%%% GNU 3DLDF is available for downloading from
%%%% http://www.gnu.org/software/3dldf/LDF.html.
%%%% Please send bug reports to Laurence.Finston@gmx.de
%%%% The mailing list help-3dldf@gnu.org is available for people to
%%%% ask other users for help.
%%%% The mailing list info-3dldf@gnu.org is for sending
%%%% announcements to users. To subscribe to these mailing lists, send an
%%%% email with ``subscribe <email-address>'' as the subject.
%%%% The author can be contacted at:
%%%% Laurence D. Finston
%%%% c/o Free Software Foundation, Inc.
%%%% 51 Franklin St, Fifth Floor
%%%% Boston, MA 02110-1301
%%%% USA
%%%% Laurence.Finston@gmx.de
%% Run like this:
%% 3dldf dodec_01.ldf
%% mpost dodec_01.mp
%% tex dodec_01.txt
%% dvips -o dodec_01.ps dodec_01.dvi
%% All on one line:
if false:
3dldf dodec_01.ldf; mpost dodec_01.mp; tex dodec_01.txt; \
dvips -o dodec_01.ps dodec_01.dvi
fi;
%% View using Ghostview like this:
%% gv dodec_01.ps &
% * (1) Beginning of 3DLDF code.
%% ** (2) Dodecahedron net for cardboard model and pentagons
%% for cutting out coverings made of watercolor paper
%% LDF 2007.09.27.
%% *** (3)
reg_polygon d;
point center;
point p[];
path q[];
sign := 1;
%% *** (3) Parameters
radius := 3;
rows := 4;
columns := 3;
horiz_skip := 2 * radius + .5;
vert_skip := horiz_skip;
%% *** (3)
d := unit_pentagon scaled (radius, 0, radius);
center := get_center d;
for i = 0 upto 4:
p[i] := get_point (i) d;
endfor;
for i = 0 upto 3:
q[i] := mediate(p[i], p[i + 1], 1.3) -- mediate(p[i + 1], p[i], 1.3);
endfor;
q4 := mediate(p4, p0, 1.3) -- mediate(p0, p4, 1.3);
beginfig(1);
if false: % true
dotlabel.top("$0$", p0);
dotlabel.lft("$1$", p1);
dotlabel.llft("$2$", p2);
dotlabel.lrt("$3$", p3);
dotlabel.rt("$4$", p4);
fi;
for k = 1 upto rows:
for i = 1 upto columns:
draw d;
for j = 0 upto 4:
draw q[j] dashed evenly;
shift q[j] by (sign * horiz_skip);
endfor;
shift d by (sign * horiz_skip);
endfor;
shift d (-sign * horiz_skip, 0, -vert_skip);
for m = 0 upto 4:
shift q[m] (-sign * horiz_skip, 0, -vert_skip);
endfor;
if is_odd sign:
sign *= -1;
fi;
endfor;
%% *** (3) End of figure 1
endfig with_projection parallel_x_z;
verbatim_metapost "end;";
end;
%% *** (3)
%% ** (2)
%% * (1) Emacs-Lisp code for use in indirect buffers when using the
%% GNU Emacs editor. The local variable list is not evaluated when an
%% indirect buffer is visited, so it's necessary to evaluate the
%% following s-expression in order to use the facilities normally
%% accessed via the local variables list.
%% \initials{LDF 2004.02.12}.
%% (progn (metafont-mode) (outline-minor-mode t) (setq fill-column 80))
%% * (1) Local variables for Emacs.
%% Local Variables:
%% mode:Metafont
%% eval:(outline-minor-mode t)
%% eval:(read-abbrev-file abbrev-file-name)
%% outline-regexp:"%% [*\f]+"
%% End:
|
