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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 = 9u#,asc_height#,desc_depth# enddef;
def ital = 0 enddef;
def fit_params = 0,0 enddef;
def gen_letter=
pickup fine.nib;
numeric thin_stem; thin_stem=.6[hair,stem]; %for upper bowl
numeric tilt; tilt=min(2*otilt,.5); %for both bowls
pos1(stem,180); y1-.5stem=-d-o; %bottom left
pos2(hair,180); y2=.5bar_height; %self-intersection (cf. z15)
x1=x2; lft x1r=hround(.75u+.5(hair-stem)); %i.e., lft x2r ~ .75u
x3r=x2r; %beginning of curve
top y5r=h+oo; bot y14r=-oo; x5r=x14r; %top and bottom bulges
top y10r=vstem+bot y9r=x_height; x9r=x10r; %top and bottom of cusp
rt x12r=hround(w-.75u); %lower right bulge
x5r=.5[lft x2r,rt x12r]; x9r-.5vstem=hround(x5r-.5u-.5vstem);
% we want to simulate the following relations, to make slopes consistent
% (where z7 is the upper right bulge):
% z5r-z3r=whatever*(z9r-z7r)=whatever*(z14r-z12r);
% z7r-z5r=whatever*(z12r-z10r)=whatever*(z5r-z3r) yscaled -1;
numeric slope;
slope=((y10r-y12r)+(y12r-y14r))/((x12r-x10r)+(x12r-x14r));
z7'r=z9r+whatever*(1,slope); z7'r=z5r+whatever*(1,-slope);
y7r=y7'r; rt x7r=hround rt x7'r;
z12r=z14r+whatever*(1,slope); z3r=z5r+whatever*(1,slope);
filldraw double_circ_stroke gr_arc.e(7,6,5)(hair,thin_stem,tilt)..
gr_arc.e(5,4,3)(hair,thin_stem,tilt)..{down}z2e..z1e; %top and left
z2=z15; pos15(hair,slope-90); %intersection pt
numeric slope;
slope=angle((z14r-z15)yscaled 2);
filldraw stroke z15e{dir slope}...gr_arc.e(14,13,12)(hair,stem,tilt); %bottom
forsuffixes e=r,l:
path curv[]e; numeric S[]e;
curv1e=reverse gr_arc.e(9,8,7)(hair,thin_stem,tilt); %cusp bottom
curv2e=gr_arc.e(12,11,10)(hair,stem,tilt); endfor %cusp top
(S1r,S2r)=curv1r intersectiontimes curv2r;
(whatever,S2l)=curv1r intersectiontimes curv2l;
(S1l,whatever)=curv1l intersectiontimes curv2r;
if S1l=-1 : S1l:=2; fi
if S2l=-1 : S2l:=2; fi
filldraw stroke subpath(0,S1e+eps) of curv1e; %fill in cusp
filldraw stroke subpath(0,S2e+eps) of curv2e;
filldraw subpath (S1r+eps,2) of curv1r...subpath(2,S2r+eps) of curv2r..cycle;
enddef;
cmchar "Lowercase beta";
beginchar("b",dims);
this_letter; penlabels(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15); endchar;
if boolean barebones: picture savedpicture; endinput; fi
cmchar "Lowercase sigma followed by beta";
begindoublechar(oct"002",dim_sigma);
mid_sigma; middoublechar(dims); this_letter; endchar;
picture savedpicture;
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