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%    Copyright (C) 1991 Silvio Levy
%     
%    This file 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 2 of the License, or
%    (at your option) any later version.
%
%    This file 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 this program.  If not, see <http://www.gnu.org/licenses/>.
%
%    As a special exception, if you create a document which uses this font,
%    and embed this font or unaltered portions of this font into the
%    document, this font does not by itself cause the resulting document to
%    be covered by the GNU General Public License. This exception does not
%    however invalidate any other reasons why the document might be covered
%    by the GNU General Public License. If you modify this font, you may
%    extend this exception to your version of the font, but you are not
%    obligated to do so. If you do not wish to do so, delete this exception
%    statement from your version.

if unknown gen_sigma : readfrom("gen_sigma") fi
     
def dims = 8.5u#,asc_height#,desc_depth# enddef;
def ital = 0 enddef;
def fit_params = 0,0 enddef;
     
def gen_letter=
  pickup fine.nib;
  lft x7r=rt x7l-hair=hround(.75u); x7=.5[x7r,x7r];             %big bulge
  pos8(stem,-90); bot y8r=0; x8=.5w; z8'r=z8'l=left;            %inflection pt
  pos9(hair,-180); rt x9l=hround(w-.75u); y9=-.5stem;           %bottom right
  y6+.5stem=x_height+o; x6+.5stem=hround(rt x9l-1.5u);          %middle right
  numeric slope; slope=angle(5(x6-x7),y6-y8); pos6(stem,slope+90);
  z6'r=z6'l=dir slope;
  pos10(vstem,-270); y9=.5[y10r,y8r]; x10-.5vstem=hround x8;
  filldraw double_circ_stroke                                   %bowl and tail
    z10e{right}...z9e{up}...club.e(8,7,6);
  pos5(hair,slope-90); z5l=z6r;                                 %attachment
  z4=.5[z3,z5]+whatever*dir slope;                              %small bulge
  pos4(hair,-180); lft x4r=hround(lft x7r+1.5u);
  y3+.5stem=h+o; x3+.5stem=hround(rt x9l-.25u); pos3(stem,slope+90);    %top rt
  filldraw circ_stroke z3e{-dir slope}..z4{down}...z5e{dir slope};
  pos2(hair,slope+90); z2r=z3r;                         %where handle attaches
  pos1(curve,0); lft x1l=hround(lft x7r+.25u); y1+.5curve=h+o;  %end of handle
  filldraw circ_stroke z1e{down}...z2e{dir slope};
enddef;
     
cmchar "Lowercase xi";
beginchar("x",dims);
this_letter; penlabels(1,2,3,4,5,6,7,8,9,10); endchar;
     
if boolean barebones: picture savedpicture; endinput; fi
     
cmchar "Lowercase sigma followed by xi";
begindoublechar(oct"030",dim_sigma);
mid_sigma; middoublechar(dims); this_letter; endchar;
     
picture savedpicture;