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+% Special font for the TeX and METAFONT manuals
+% This file was prepared "hastily" and hasn't been "polished".
+% In particular, some characters won't work when aspect_ratio<>1.
+
+font_size 10pt#;
+em#:=10pt#; ht#:=250/36pt#;
+mode_setup;
+
+font_identifier "MANFNT";
+font_coding_scheme "PI";
+
+message "Hex symbols";
+width1#=.4pt#*(ht#/(100/36pt#));
+width2#=.6pt#*(ht#/(100/36pt#));
+define_blacker_pixels(width1,width2);
+
+beginchar(1,2ht#,ht#,0); "Original hex"; % \hexa
+pickup pencircle scaled width1;
+w:=2good.x .5w;
+x1=x4=good.x 0; x2=x5=.5w; x3=x6=good.x w;
+y1=y2=y3=good.y h; y4=y5=y6=good.y 0;
+draw z1..z6; draw z2..z5; draw z3..z4;
+for k=1 upto 6: drawdot z[k]; endfor
+labels (1,2,3,4,5,6); endchar;
+
+beginchar(2,2ht#,ht#,0); "Top/bot adjusted hex"; % \hexb
+pickup pencircle scaled width1;
+w:=2good.x .5w;
+x1=x4=good.x 0; x2=x5=.5w; x3=x6=good.x w;
+top y1=h; y1=y2=y3; bot y4=0; y4=y5=y6;
+draw z1..z6; draw z2..z5; draw z3..z4;
+for k=1 upto 6: drawdot z[k]; endfor
+labels (1,2,3,4,5,6); endchar;
+
+beginchar(3,2ht#,ht#,0); "Bold top/bot adjusted hex"; % \hexc
+pickup pencircle scaled width2;
+w:=2good.x .5w;
+x1=x4=good.x 0; x2=x5=.5w; x3=x6=good.x w;
+top y1=h; y1=y2=y3; bot y4=0; y4=y5=y6;
+draw z1..z6; draw z2..z5; draw z3..z4;
+for k=1 upto 6: drawdot z[k]; endfor
+labels (1,2,3,4,5,6); endchar;
+
+beginchar(4,2ht#,ht#,0); "Bold top/bot/lft/rt adjusted hex"; % \hexd
+pickup pencircle scaled width2;
+w:=2good.x .5w;
+lft x1=0; x1=x4; x2=x5=.5w; rt x3=w-1; x3=x6;
+top y1=h; y1=y2=y3; bot y4=0; y4=y5=y6;
+draw z1..z6; draw z2..z5; draw z3..z4;
+for k=1 upto 6: drawdot z[k]; endfor
+labels (1,2,3,4,5,6); endchar;
+
+beginchar(5,2ht#,ht#,0); "Hex corrected for darkness in the center"; % \hexe
+pickup pencircle scaled width1;
+w:=2good.x .5w;
+top z1=(0,h); top z2=(.5w,h); top z3=(w,h);
+bot z4=(0,0); bot z5=(.5w,0); bot z6=(w,0);
+for k=1 upto 6: drawdot z[k]; endfor
+z1'=.25[z1,z6]; z6'=.75[z1,z6]; theta1:=angle(z6-z1)+90;
+z3'=.25[z3,z4]; z4'=.75[z3,z4]; theta3:=angle(z4-z3)+90;
+z7=z8=.5[z1,z6];
+penpos1'(width1,theta1); penpos6'(width1,theta1); penpos7(.6width1,theta1);
+penpos3'(width1,theta3); penpos4'(width1,theta3); penpos8(.6width1,theta3);
+draw z1..z1'; penstroke z1'e{z6'-z1'}..z7e..{z6'-z1'}z6'e; draw z6'..z6;
+draw z2..z5;
+draw z3..z3'; penstroke z3'e{z4'-z3'}..z8e..{z4'-z3'}z4'e; draw z4'..z4;
+penlabels(1,1',7,2,3,3',8,4,4',5,6,6'); endchar;
+
+message "Stick A's";
+b#:=250/36pt#; a#:=150/36pt#; s#:=30/36pt#;
+standardwidth#:=.4pt#;
+darkwidth#:=.8pt#; lightwidth#:=.2pt#;
+define_blacker_pixels(standardwidth,darkwidth,lightwidth);
+define_pixels(b,a,s);
+def stick_A(expr alpha)(text pentype)=
+beginchar (incr(charcode),s#+a#+s#,b#,0);
+pickup pentype;
+bot z1=(good.x s,0); z5=z1+(a,0);
+z3=(1/2[x1,x5],good.y b);
+z2=alpha[z1,z3]; z4=alpha[z5,z3];
+draw z1..z3; draw z3..z5; draw z2..z4;
+drawdot z1; drawdot z5; drawdot z3;
+labels(1,2,3,4,5); endchar; enddef;
+charcode:=5; % the first A will be number 6
+
+stick_A((3-sqrt5)/2, % (area above bar / area below) = golden ratio % \Aa
+ pencircle scaled standardwidth);
+
+for alpha=.2 step .05 until .5+10epsilon:
+ stick_A(alpha,pencircle scaled standardwidth); endfor % chars 7..13
+
+beginchar(14,s#+a#+s#,b#,0);
+pickup pencircle scaled standardwidth;
+bot z1=(good.x s,0); z5=z1+(a,0);
+z3=(1/2[x1,x5],good.y b);
+z4-z2=whatever*dir20; 1/2[y2,y4]=2/3[y3,y1];
+z2=whatever[z1,z3]; z4=whatever[z3,z5];
+draw z1..z3; draw z3..z5; draw z2..z4;
+drawdot z1; drawdot z5; drawdot z3;
+labels(1,2,3,4,5); endchar;
+
+stick_A((3-sqrt5)/2,pencircle xscaled darkwidth yscaled lightwidth); % \Ab=15
+stick_A((3-sqrt5)/2,
+ pencircle xscaled darkwidth yscaled lightwidth rotated 30); % \Ac=16
+
+message "Kidney beans";
+standardwidth#:=.4pt#;
+darkwidth#:=.8pt#; lightwidth#:=.2pt#;
+define_blacker_pixels(standardwidth,darkwidth,lightwidth);
+b#:=100/36pt#;
+define_pixels(b);
+def bean(text pentype)=
+beginchar (incr(charcode),2b#,1.5b#,0);
+pickup pentype;
+z1=(0,b); z2=(b,b); z3=(2b,b);
+z4=(0,0); z5=(b,0); z6=(2b,0);
+draw z5..z4..z1..z3..z6..cycle;
+labels(1,2,3,4,5,6); endchar; enddef;
+charcode:=16; % the first bean will be number 17
+
+bean(pencircle scaled standardwidth); % \beana=17
+bean(pencircle scaled darkwidth); % \beanb=18
+bean(pencircle xscaled darkwidth yscaled lightwidth); % \beanc=19
+bean(pencircle xscaled darkwidth yscaled lightwidth rotated 30); % \beand=20
+
+message "Pen nibs";
+bigthickwidth#:=8pt#; littlethickwidth#:=2pt#;
+define_blacker_pixels(bigthickwidth,littlethickwidth);
+
+beginchar(21,bigthickwidth#,0,0); % \niba
+pickup pencircle xscaled bigthickwidth yscaled littlethickwidth;
+lft z1=(0,good.y 0);
+drawdot z1;
+labels(1); endchar;
+
+beginchar(22,bigthickwidth#,0,0); % \nibb
+pickup pencircle xscaled bigthickwidth yscaled littlethickwidth rotated 30;
+lft z1=(0,good.y 0);
+drawdot z1;
+labels(1); endchar;
+
+beginchar(23,littlethickwidth#,0,0); % \nibc
+pickup pencircle yscaled bigthickwidth xscaled littlethickwidth;
+lft z1=(0,good.y 0);
+drawdot z1;
+labels(1); endchar;
+
+message "Ionian letters";
+em#:=10pt#; cap#:=7pt#;
+thin#:=1/3pt#; thick#:=5/6pt#;
+slab#:=.8pt#;
+stem#:=.9pt#;
+o#:=1/5pt#;
+
+define_pixels(em,cap);
+define_blacker_pixels(thin,thick,slab,stem);
+define_corrected_pixels(o);
+
+curve_sidebar=round 1/18em;
+
+%vardef pentaper@#(expr lt,rt) = % dropped from PLAIN
+% x@#l:=lt[x@#l,x@#]; x@#r:=rt[x@#r,x@#];
+% y@#l:=lt[y@#l,y@#]; y@#r:=rt[y@#r,y@#] enddef;
+
+
+% ill-fated example wasn't attractive enough by itself:
+%bar:=slab;
+%beginchar(24,0.6em#,cap#,0); % "The letter T"; \IOT=24
+%penpos1(bar,70);
+%penpos2(bar,35);
+%penpos4(bar,35);
+%penpos5(bar,55);
+%x1=0; y1r=h; y2r=y4r=.2[y1r,y1]; y5l=.3[y1l,y1];
+%x2l=1/3[x1l,x5l]; x4l=2/3[x1l,x5l]; x5=w;
+%penpos6(stem,20); pentaper6(.1,0);
+%penpos3(x6r-x6l,0);
+%penpos7(stem,10);
+%y3=y2; x3=.5w;
+%x6r=x3r; y6=2/3h;
+%x7=x6; y7=0;
+%penstroke z1e{curl infinity}..z2e..z4e..{curl infinity}z5e;
+%penstroke z3e..z6e{down}..z7e;
+%labels.top(1r,2l,2,2r,4l,4,4r,6);
+%labels.lft(1,1l,6l);
+%labels.rt(5,5r,5l,6r);
+%labels.bot(3l,3,3r,7,7r,7l);
+%endchar;
+
+beginchar(25,5/9em#,cap#,0); % "The letter S"; /IOS=25
+penpos1(slab,70);
+penpos2(.5slab,80);
+penpos3(.5[slab,thick],200);
+penpos5(.5[slab,thick],210);
+penpos6(.7slab,80);
+penpos7(.25[slab,thick],72);
+x1=x5; y1r=.94h+o;
+x2=x4=x6=.5w; y2r=h+o; y4=.54h; y6l=-o;
+x3r=.04em; y3=.5[y4,y2];
+x5l=w-.03em; y5=.5[y4,y6];
+.5[x7l,x7]=.04em; y7l=.12h-o;
+path trial; trial=z3{down}..z4..{down}z5;
+pair dz; dz=direction 1 of trial;
+penpos4(thick,angle dz-90);
+penstroke z1e..z2e{left}..z3e{down}..z4e{dz}..z5e{down}..z6e{left}..z7e;
+labels.lft(2,3r,5r,6,7);
+labels.rt(1,3l,4,5l);
+labels.top(1r,2r,3,4l,5,6r,7r);
+labels.bot(1l,2l,4r,6l,7l);
+endchar;
+
+beginchar(26,0.8em#,cap#,0); % "The letter O"; \IOO=26
+ penpos1(thick,10); penpos2(.1[thin,thick],90-10);
+ penpos3(thick,180+10); penpos4(thin,270-10);
+ x1l=w-x3l=curve_sidebar; x2=x4=.5w;
+ y1=.49h; y2l=-o; y3=.51h; y4l=h+o;
+ penstroke z1e{down}..z2e{right}..z3e{up}..z4e{left}..cycle;
+ penlabels(1,2,3,4); endchar;
+
+beginchar(27,.35em#,cap#,0); % "The letter I"; \IOI=27
+ penpos1(stem,15); penpos2(.9stem,12); penpos3(stem,10);
+ x1=x2=x3=.5w; y1=h; y2=.55h; y3=0; x2l:=1/6[x2l,x2];
+ penstroke z1e..z2e{down}..z3e;
+ penlabels(1,2,3); endchar;
+
+%ligtable 24: 24 kern .05em#, 26 kern -.05em#; % TT and TO are adjusted
+
+message "Cubes and such";
+s#:=5pt#; define_pixels(s); % side of the square
+beginchar(28,5/3s#,4/3s#,0); % "Possible cube"; \cubea=28
+z1=(-epsilon,-epsilon); z2=(s+epsilon,-epsilon);
+ z3=(-epsilon,s+epsilon); z4=(s+epsilon,s+epsilon);
+for k=1 upto 4: z[k+4]=z[k]+(2/3s,1/3s); endfor
+pickup pencircle scaled .4pt;
+draw z5--z6--z8--z7--cycle;
+pickup pencircle scaled 1.6pt;
+erase draw z2--z4--z3;
+pickup pencircle scaled .4pt;
+draw z1--z2--z4--z3--cycle;
+for k=1 upto 4: draw z[k]--z[k+4]; endfor
+labels.top(1,2,5,6);
+labels.bot(3,4,7,8);
+endchar;
+
+beginchar(29,5/3s#,4/3s#,0); % "Impossible cube"; \cubeb=29
+z1=(-epsilon,-epsilon); z2=(s+epsilon,-epsilon);
+ z3=(-epsilon,s+epsilon); z4=(s+epsilon,s+epsilon);
+for k=1 upto 4: z[k+4]=z[k]+(2/3s,1/3s); endfor
+pickup pencircle scaled .4pt;
+draw z3--z4; draw z5--z6;
+cullit; pickup pencircle scaled 1.6pt;
+undraw z7--1/2[z7,z5];
+ undraw z2--1/2[z2,z4];
+cullit; pickup pencircle scaled .4pt;
+draw z3--z1--z2--z4;
+ draw z5--z7--z8--z6;
+for k=1 upto 4: draw z[k]--z[k+4]; endfor
+labels.top(1,2,5,6);
+labels.bot(3,4,7,8);
+endchar;
+
+beginchar(30,10pt#,7pt#,2pt#); % bicentennial star
+pair center; center=(.5w,2pt);
+numeric radius; radius=5pt;
+for k=0 upto 4: z[k]=center+(radius,0) rotated(90+360/5k); endfor
+def :: = ..tension 5.. enddef;
+path star; star=z0::z2::z4::z1::z3::cycle;
+pickup pencircle scaled .4pt; draw star;
+cullit; pickup pencircle scaled 1.6pt;
+for k=0 upto 4: undraw subpath(k+.55,k+.7) of star; endfor
+cullit; pickup pencircle scaled .4pt;
+for k=0 upto 4: draw subpath(k+.47,k+.8) of star; endfor
+labels(0,1,2,3,4); endchar;
+
+beginchar(31,2/3*11pt#,.5*11pt#,0); % \oneu=31
+pickup pencircle scaled 3/4pt yscaled 1/3 rotated 30;
+save ww; ww=3/2w;
+save t; transform t;
+t=identity rotatedaround((.5ww,h),-90);
+x2=.35ww; x3=good.x .6ww;
+y2=good.y .2h; top y3=round .8h+eps;
+save p; path p; p=z2{right}...{up}z3;
+top z1=point .5 of p transformed t;
+draw (z1...p);
+labels(1,2,3); endchar;
+
+beginchar(38,11pt#,11pt#,0); % \fouru=38
+pickup pencircle scaled 3/4pt yscaled 1/3 rotated 30;
+save t; transform t;
+t=identity rotatedaround((.5w,.5h),-90);
+x2=.35w; x3=good.x .6w;
+y2=good.y .1h; top y3=round .4h+eps;
+save p; path p; p=z2{right}...{up}z3;
+top z1=point .5 of p transformed t;
+draw (z1...p);
+addto currentpicture also currentpicture transformed t;
+addto currentpicture also currentpicture transformed(t transformed t);
+labels.bot(1,3); labels.rt(2); endchar;
+
+beginchar(39,11pt#,11pt#,0); % \fourc=39
+pickup pencircle scaled 3/4pt yscaled 1/3 rotated 30;
+save t; transform t;
+t=identity rotatedaround((.5w,.5h),-90);
+x2=.35w; x3=good.x .6w;
+y2=good.y .1h; top y3=round .4h+eps;
+save p; path p; p=z2{right}...{up}z3;
+top z1=point .5 of p transformed t;
+draw (z1...p) rotatedaround((.5w,.5h),-45)
+ withpen pencircle scaled 3/4pt yscaled 1/3 rotated-15;
+addto currentpicture also currentpicture transformed t;
+addto currentpicture also currentpicture transformed(t transformed t);
+labels.bot(1,3); labels.rt(2); endchar;
+
+message "Circle variations";
+
+beginchar(32,5pt#,5pt#,0); "Quarter circle"; % \circa
+pickup pencircle scaled (.4pt+blacker);
+draw quartercircle scaled 10pt; endchar;
+
+beginchar(33,5pt#,5pt#,0); "Filled quarter circle"; % \circb
+fill ((0,0)--quartercircle--cycle) scaled 10pt; endchar;
+
+beginchar(34,5pt#,5pt#,0); "Rotated quarter circle"; % \circc
+pickup pencircle scaled (.4pt+blacker);
+draw quartercircle rotated 90 scaled 10pt shifted (5pt,0); endchar;
+
+beginchar(35,5pt#*sqrt2,5pt#,0); "Cone"; % \circd
+pickup pencircle scaled (.4pt+blacker);
+draw ((0,0)--quartercircle--cycle)
+ rotated 45 scaled 10pt shifted (.5w,0); endchar;
+
+beginchar(36,10pt#,7.5pt#,2.5pt#); "Concentric circles"; % \circe
+pickup pencircle scaled (.4pt+blacker);
+for D=.2w,.6w,w:
+ draw fullcircle scaled D shifted (.5w,.5[-d,h]);
+ endfor endchar;
+
+beginchar(37,10pt#,7.5pt#,2.5pt#); "Concentric diamonds"; % \circf
+pickup pencircle scaled (.4pt+blacker);
+for D=.2w,.6w,w:
+ draw unitsquare shifted -(.5,.5) rotated 45
+ scaled (D/sqrt2) shifted (.5w,.5[-d,h]);
+ endfor endchar;
+
+message "Miscellaneous symbols"; % mostly from the old manfnt
+
+beginchar(oct"171",15pt#,7.5pt#,2.5pt#); % arrow for errata lists
+curve#:=30/36pt#; dcurve#:=60/36pt#; bar#:=25/36pt#;
+define_whole_blacker_pixels(curve,dcurve,bar);
+penpos1(curve,90); penpos2(curve,90); penpos3(dcurve,90);
+penpos4(dcurve,90); penpos5(curve,90); penpos6(curve,90);
+y1r=vround(y1r-(y1-.5[-d,h])); y2=y5=y6=y1=y0; y4l=-d; y3r=h;
+x1=0; x2=.1w; x3=.2w; x4=.55w; x5=.65w;
+x2l:=x2l+.25curve; x5r:=x5r-.25curve;
+penstroke z1e--z2e--z3e--z4e--z5e; % crooked arrow
+penpos13(bar,0); penpos14(bar,0); x0=w;
+y13-y0=y0-y14=.24h+eps; x13=x14=7/8w-eps;
+penpos15(.5bar,angle(z14-z0)); z15l=z0; penpos16(.5bar,angle(z13-z0)); z16l=z0;
+z19=.381966[.5[z13,z14],z0];
+numeric t; path p; p=z14l{z19-z14}..z16r;
+t=xpart(p intersectiontimes((0,y6l)--(w,y6l))); x6=xpart point t of p;
+filldraw z0..{z14-z19}z14r--subpath (0,t) of\\(z14l{z19-z14}..z16r)
+ --z6l--z5l--z5r--z6r--subpath (t,0) of\\(z13l{z19-z13}..z15r)
+ --z13r{z19-z13}..z0 & cycle; % arrowhead and link
+penlabels(range 1 thru 19); endchar;
+
+beginchar(oct"170", 5pt#, 6.25pt#, 0); "Triangle for exercises";
+x1=x2=w-x3=round .43pt; y3=.5+floor.5h;
+z1-z2=(z3-z2) rotated 60;
+y1:=.5sqrt3+round(y1-.5sqrt3); y2:=h-y1;
+fill z1--z2--z3--cycle;
+labels(1,2,3); endchar;
+
+beginchar("6",256/36pt#,250/36pt#,0); % upper triangle for Addison-Wesley logo
+x1=round 5/36pt; x2=round .5w; x2-x1=x3-x2=(y2-y1)/(sqrt 3);
+y1=y3=0; fill z1--z2--z3--cycle; labels(1,2,3); endchar;
+
+beginchar("7",256/36pt#,250/36pt#,0); % lower triangle for Addison-Wesley logo
+x1=round 5/36pt; x2=round .5w; x2-x1=x3-x2=(y1-y2)/(sqrt 3);
+y1=y3; y2=0; fill z1--z2--z3--cycle; labels(1,2,3); endchar;
+
+def font_setup=
+define_pixels(u,tiny,axis,hheight,border);
+define_blacker_pixels(hair,thin,thick,rulethickness);
+pickup if tiny<.5: nullpen else: pencircle scaled tiny fi;
+tinypen:=savepen;
+currenttransform:=identity yscaled aspect_ratio slanted slant;
+enddef;
+
+% typical cmr10 parameters
+u#:=20/36pt#;
+tiny#:=0;
+axis#:=90/36pt#;
+hheight#:=250/36pt#;
+border#:=20/36pt#;
+hair#:=8/36pt#;
+thin#:=9/36pt#;
+thick#:=25/36pt#;
+fixwidth:=0;
+slant:=0;
+rulethickness#:=.4pt#;
+
+baselinedistance#:=11pt#;
+heavyline#:=50/36pt#;
+font_setup;
+define_whole_pixels(baselinedistance);
+define_blacker_pixels(heavyline);
+
+beginchar(127,25u#,hheight#+border#,0); "Dangerous bend sign";
+pickup pencircle scaled rulethickness;
+top y1=25/27h; lft x4=0;
+x1+x1=x1a+x1b=x4b+x2a=x4+x2=x4a+x2b=x3b+x3a=x3+x3=w;
+x4a=x4b=x4+u; x3b=x1a=x1-2u;
+y4+y4=y4a+y4b=y3b+y1a=y3+y1=y3a+y1b=y2b+y2a=y2+y2=0;
+y1a=y1b=y1-2/27h; y4b=y2a=y4+4/27h;
+draw z1a..z1..z1b---z2a..z2..z2b---
+ z3a..z3..z3b---z4a..z4..z4b---cycle; % signboard
+x10=x11=x12=x13=good.x(.5w-u); x14=x15=x16=x17=w-x10;
+y10=y14=28/27h+epsilon; bot y13=-baselinedistance;
+z11=(z10..z13) intersectionpoint (z1a{z1a-z4b}..z1{right});
+y15=y11; y16=y12=-y11; y17=y20=y21=y13;
+draw z11--z10--z14--z15; draw z12--z13; draw z16--z17; % signpost
+x20=w-x21; x21-x20=16u; draw z20--z21; % ground level
+x38=w-x31; x38-x31=8u; x32=x34=x38; x31=x35=x37;
+y31=-y38=12/27h; y32=-y37=9/27h; y34=-y35=3/27h;
+pickup pencircle scaled heavyline;
+draw z32{z32-z31}..z34---z35..z37{z38-z37}; % the dangerous bend
+pickup penrazor xscaled heavyline rotated (angle(z32-z31)+90);
+draw z31--z32; draw z37--z38; % upper and lower bars
+labels(1,1a,1b,2,2a,2b,3,3a,3b,4,4a,4b,10,11,12,13,14,15,16,17,20,21,
+ 31,32,33,34,35,36,37,38);
+picture dbend; dbend=currentpicture;
+endchar;
+beginchar(126,25u#,hheight#+border#,0); "Lefthanded ditto";
+currentpicture:=dbend reflectedabout((.5w,0),(.5w,h));
+endchar;
+beginchar(0,25u#,hheight#+border#,0); "Reverse video ditto";
+fill (0,-11pt)--(w,-11pt)--(w,h)--(0,h)--cycle;
+addto currentpicture also -dbend;
+endchar;
+
+beginchar(oct"140",3.75pt#,7pt#,4/3pt#); "special 1/7 for a quotation";
+currenttransform:=currenttransform slanted(2/7/aspect_ratio);
+y3=y4=.5[h,-d]=.5[y2,y5]; y5=y6;
+x1=x2=x7=.5w; x5+x6=x3+x4=w; x5=x3+1/6pt;
+pickup pencircle xscaled .5pt yscaled .35pt;
+bot y2=top y3+pt; top y1=h; bot y7=-d; lft x3=0; % y2 moved up 1/3pt (Feb 5)
+draw z1..z2; draw z3..z4;
+draw z5--z6..{down}z7;
+labels(1,2,3,4,5,6,7);
+endchar;
+currenttransform:=currenttransform slanted(-2/7/aspect_ratio);
+
+% Circumscribed circles
+pickup pencircle scaled(.4pt+blacker); rpen:=savepen;
+def begincircle(expr code,units,depth,asp,superness)=
+beginchar(code,units*20/36pt#,0,0); pickup rpen;
+aa:=.5(w++depth*pt/asp);
+x2=x4=.5[x1,x3]=.5w; y1=y3=.5[y2,y4]=-.5round(depth*pt);
+x1=good.x(x2+aa); y2=good.y(y1+asp*aa);
+draw superellipse(z1,z2,z3,z4,superness); labels(1,2,3,4) enddef;
+
+"Ellipse for floating-point mod operator"; % also for pseudo coin top
+begincircle(oct"130",29,5,.5,.75786); endchar;
+
+"Edge and bottom of pseudo coin";
+begincircle(oct"133",29,5,.5,.75786); charht:=2pt#;
+erase fill rt z1--(rt x1,top y2)--(lft x3,top y2)--lft z3--cycle;
+x0=x1; x5=x3; y0=y5=y1+2pt; draw z0--z1; draw z3--z5; labels(0,5); endchar;
+
+"Circle to enclose two digits";
+begincircle(oct"131",19,7.5,1,.75786); endchar;
+
+"Circle to enclose an exponent of 2";
+begincircle(oct"132",9,6,1,1/sqrt2); endchar;
+
+% Now we do the \qc font from TeXbook Appendix D
+pickup pencircle scaled ceiling pt; ptpen:=savepen;
+
+beginchar("a",10pt#,5.5pt#,4.5pt#); pickup ptpen; % W to S
+bot y1=lft x2=0; x2=.5[x1,x1+w]; y1=.5[y2,y2+h+d];
+draw z1{right}..{down}z2; labels(1,2); endchar;
+
+beginchar("b",10pt#,5.5pt#,4.5pt#); pickup ptpen; % W to N
+bot y1=lft x2=0; x2=.5[x1,x1+w]; y1=.5[y2,y2-h-d];
+draw z1{right}..{up}z2; labels(1,2); endchar;
+
+beginchar("c",10pt#,5.5pt#,4.5pt#); pickup ptpen; % E to N
+bot y1=lft x2=0; x2=.5[x1,x1-w]; y1=.5[y2,y2-h-d];
+draw z1{left}..{up}z2; labels(1,2); endchar;
+
+beginchar("d",10pt#,5.5pt#,4.5pt#); pickup ptpen; % E to S
+bot y1=lft x2=0; x2=.5[x1,x1-w]; y1=.5[y2,y2+h+d];
+draw z1{left}..{down}z2; labels(1,2); endchar;
+
+fontdimen 8: pt#; % rule thickness in \qc
+
+message "METAFONT logo";
+
+def arc(suffix i,j) =
+ (z.i{0,y.j-y.i}..
+ (beta[x.i,x.j],beta[y.j,y.i]){z.j-z.i}..
+ z.j{x.j-x.i,0}) enddef;
+
+def double_arc(suffix i,j,k) =
+ arc(i,j) & reverse arc(k,j) enddef;
+
+alpha:=.45; % controls bar location and similar things
+beta:=.2; % controls squareness of bowls
+
+def setparameters(text parameter_equations) =
+ string code.M,code.E,code.T,code.A,code.F,code.O,code.N;
+ numeric h#, xx#, yy#, o#, s#, u#, px#, py#;
+ numeric leftstemloc, barheight;
+ parameter_equations;
+ yy#=(h#/13.5u#)*xx#; define_whole_pixels(xx,yy);
+ define_pixels(s,u);
+ define_corrected_pixels(o);
+ py#=.9px#; define_blacker_pixels(px,py);
+ pickup pencircle xscaled px yscaled py;
+ logo_pen:=savepen;
+ leftstemloc:=good.x((2.5u#+s#)*pt);
+ barheight:=good.y(alpha*h#*pt);
+ ligtable code.T: code.A kern -.5u#;
+ ligtable code.F: code.O kern -u#;
+enddef;
+
+def beginlogochar(suffix c)(expr n) = % code c; width is n units plus sidebars
+ beginchar(code.c,n*u#+2s#,h#,0); pickup logo_pen enddef;
+
+def do_it =
+beginlogochar(M,18);
+x1=x2=leftstemloc; x4=x5=w-x1; x3=w-x3;
+y1=y5; y2=y4; bot.y1=-o; top y2=h+o; y3=y1+yy;
+draw z1--z2--z3--z4--z5;
+labels(1,2,3,4,5);
+endchar;
+
+beginlogochar(E,14);
+x1=x2=x3=leftstemloc; x4=x6=w-x1+o; x5=x4-xx;
+y1=y6; y2=y5; y3=y4; bot.y1=0; top.y3=h; y2=barheight;
+draw z6--z1--z3--z4; draw z2..z5;
+labels(1,2,3,4,5,6);
+endchar;
+
+beginlogochar(T,13);
+italcorr h#*slant+.5u#;
+if odd(w-px): w:=w+1; fi % allows a symmetric stem
+lft x1=-epsilon; x2=w-x1; x3=x4=.5w; % I tried lft x1=s-o; not as good
+y1=y2=y3; top.y1=h; bot.y4=-o;
+draw z1..z2; draw z3..z4;
+labels(1,2,3,4);
+endchar;
+
+beginlogochar(A,15); % changed from 16 on Oct 16!
+x1+x4=x2+x3=2x5=w; x1=x2=leftstemloc;
+y1=y4; y2=y3; bot.y1=-o; top.y5=h+o; y2=barheight;
+draw double_arc(2,5,3); draw z1--z2--z3--z4;
+labels(1,2,3,4,5);
+endchar;
+
+beginlogochar(F,14);
+x1=x2=x3=leftstemloc; x4=w-x1+o; x5=x4-xx;
+y2=y5; y3=y4; bot.y1=-o; top.y3=h; y2=barheight;
+draw z1--z3--z4; draw z2..z5;
+labels(1,2,3,4,5);
+endchar;
+
+beginlogochar(O,15);
+x1+x2=x3+x4=w; x1=good.x(1.5u+s); x3=x4;
+bot.y3=-o; top.y4=h+o; y1=y2=barheight;
+draw double_arc(1,4,2); draw double_arc(2,3,1);
+labels(1,2,3,4);
+endchar;
+
+beginlogochar(N,15);
+x1+x4=x1+x3=x2+x5=w; x1=x2=leftstemloc;
+y1=y4=y3-yy; bot.y1=-o; y2=y5; top.y5=h+o;
+draw z1--z2--z3; draw z4..z5;
+labels(1,2,3,4,5);
+endchar;
+enddef; % the end of "do_it"
+
+% ten-point size
+message " ten point";
+setparameters(h#=6; % height of characters, in pt
+slant:=0;
+ xx#=0.6; % extra length of certain features, in pt
+ u#=4/9; % unit width, in pt
+ s#=0; % extra sidebar, in pt
+ o#=1/9; % overshoot of curves, in pt
+ px#=2/3; % horizontal thickness of pen, in pt
+ code.M="M"; code.E="E"; code.T="T"; code.A="A";
+ code.F="F"; code.O="O"; code.N="N")
+do_it;
+
+currenttransform:=currenttransform slanted(.25/aspect_ratio);
+% ten-point size, slanted: 89:;<=>: = METAFONT!
+message " slanted ten point";
+setparameters(h#=6; % height of characters, in pt
+slant:=.25;
+ xx#=0.6; % extra length of certain features, in pt
+ u#=4/9; % unit width, in pt
+ s#=0; % extra sidebar, in pt
+ o#=1/9; % overshoot of curves, in pt
+ px#=2/3; % horizontal thickness of pen, in pt
+ code.M="8"; code.E="9"; code.T=":"; code.A=";";
+ code.F="<"; code.O="="; code.N=">")
+do_it;
+currenttransform:=currenttransform slanted(-.25/aspect_ratio);
+
+% nine-point size: hijklmnj = METAFONT!
+message " nine point";
+setparameters(h#=.9*6; % height of characters, in pt
+slant:=0;
+ xx#=.9*0.6; % extra length of certain features, in pt
+ u#=.91*4/9; % unit width, in pt
+ s#=.08; % extra sidebar, in pt
+ o#=1/10; % overshoot of curves, in pt
+ px#=.9*2/3; % horizontal thickness of pen, in pt
+ code.M="h"; code.E="i"; code.T="j"; code.A="k";
+ code.F="l"; code.O="m"; code.N="n")
+do_it;
+font_quad 18u#+2s#; % we take spacing from the 9-point logo font
+font_normal_space 6u#+2s#;
+font_normal_stretch 3u#;
+font_normal_shrink 2u#;
+
+% eight-point size: opqrstuq = METAFONT!
+message " eight point";
+setparameters(h#=.8*6; % height of characters, in pt
+slant:=0;
+ xx#=.8*0.6; % extra length of certain features, in pt
+ u#=.82*4/9; % unit width, in pt
+ s#=.2; % extra sidebar, in pt
+ o#=1/12; % overshoot of curves, in pt
+ px#=.8*2/3; % horizontal thickness of pen, in pt
+ code.M="o"; code.E="p"; code.T="q"; code.A="r";
+ code.F="s"; code.O="t"; code.N="u")
+do_it;
+
+% eight-point size, magnified 10/8: /0123451 = METAFONT!
+message " magnified eight point";
+setparameters(h#=.8*6*10/8; % height of characters, in pt
+slant:=0;
+ xx#=.8*0.6*10/8; % extra length of certain features, in pt
+ u#=.82*4/9*10/8; % unit width, in pt
+ s#=.2*10/8; % extra sidebar, in pt
+ o#=1/12*10/8; % overshoot of curves, in pt
+ px#=.8*2/3*10/8; % horizontal thickness of pen, in pt
+ code.M="/"; code.E="0"; code.T="1"; code.A="2";
+ code.F="3"; code.O="4"; code.N="5")
+do_it;
+
+currenttransform:=currenttransform slanted(2/7/aspect_ratio);
+% eight-point size, slanted: \]^_efg^ = METAFONT!
+message " slanted eight point";
+slant:=2/7;
+setparameters(h#=.8*6; % height of characters, in pt
+ xx#=.8*0.6; % extra length of certain features, in pt
+ u#=.82*4/9; % unit width, in pt
+ s#=.2; % extra sidebar, in pt
+ o#=1/12; % overshoot of curves, in pt
+ px#=.8*2/3; % horizontal thickness of pen, in pt
+ code.M="\"; code.E="]"; code.T="^"; code.A="_";
+ code.F="e"; code.O="f"; code.N="g")
+do_it;
+currenttransform:=currenttransform slanted(-2/7/aspect_ratio);
+
+% special size for the title page: ()*+,-.* = METAFONT!
+message " title page size";
+setparameters(h#=250/9; % height of characters, in pt (same as cmssc40)
+slant:=0;
+ xx#=2.9; % extra length of certain features, in pt
+ u#=(1+sqrt5)/2; % unit width, in pt
+ s#=.2; % extra sidebar, in pt
+ o#=4/9; % overshoot of curves, in pt
+ px#=4; % horizontal thickness of pen, in pt
+ code.M="("; code.E=")"; code.T="*"; code.A="+";
+ code.F=","; code.O="-"; code.N=".")
+do_it;
+
+currenttransform:=currenttransform slanted(-1/9/aspect_ratio);
+% backslanted skinny bold: BCDGHIJD = METAFONT!
+message " weird skinny bold condensed";
+setparameters(h#=25; % height of characters, in pt
+slant:=-1/9; % leftward bias
+ xx#=1.5; % extra length of certain features, in pt
+ u#=3/9; % unit width, in pt
+ s#=1/3; % extra sidebar, in pt
+ o#=2/9; % overshoot of curves, in pt
+ px#=1; % horizontal thickness of pen, in pt
+ code.M="B"; code.E="C"; code.T="D"; code.A="G";
+ code.F="H"; code.O="I"; code.N="J")
+do_it;
+currenttransform:=currenttransform slanted(+1/9/aspect_ratio);
+
+% ultrawide light: KLUVWvwU = METAFONT!
+message " weird light extended";
+setparameters(h#=6; % height of characters, in pt
+slant:=0;
+ xx#=2; % extra length of certain features, in pt
+ u#=4/3; % unit width, in pt
+ s#=-2/3; % extra sidebar, in pt
+ o#=1/9; % overshoot of curves, in pt
+ px#=1/3; % horizontal thickness of pen, in pt
+ code.M="K"; code.E="L"; code.T="U"; code.A="V";
+ code.F="W"; code.O="v"; code.N="w")
+do_it;
+
+message "Pixel symbols";
+
+beginchar("P",722.7/722.909pt#,722.7/722.909pt#,0); % 1pt pixel
+pickup pencircle scaled .2pt;
+top lft z1=(0,.8h); top rt z2=(.8w,.8h);
+bot lft z3=(0,0); bot rt z4=(.8w,0);
+draw z1--z4; draw z2--z3; endchar;
+
+beginchar("Q",722.7/722.909pt#,722.7/722.909pt#,0); % 1pt nonpixel
+pickup pencircle scaled .2pt;
+drawdot(.4w,.4h); endchar;
+
+beginchar("R",3*722.7/722.909pt#,3*722.7/722.909pt#,0); % 3pt pixel
+pickup pencircle scaled .3pt;
+interim autorounding:=0;
+top lft z1=(0,.9h); top z2=(.45w,.9h); top rt z3=(.9w,.9h);
+lft z4=(0,.45h); rt z5=(.9w,.45h);
+bot lft z6=(0,0); bot z7=(.45w,0); bot rt z8=(.9w,0);
+draw z1+(-50epsilon,50epsilon)--z8+(50epsilon,-50epsilon);
+draw z2+(0,50epsilon)--z7-(0,50epsilon);
+draw z3+(50epsilon,50epsilon)--z6-(50epsilon,50epsilon);
+draw z4-(50epsilon,0)--z5+(50epsilon,0); endchar;
+
+beginchar("S",3*722.7/722.909pt#,3*722.7/722.909pt#,0); % 3pt nonpixel
+pickup pencircle scaled .3pt;
+drawdot(.45w,.45h); endchar;
+
+message "Gothic d";
+
+beginchar("?",4pt#,8pt#,0);
+ % taken from NB, but my changes may have spoiled it
+stem_length#:=10/6.7pt#; define_blacker_pixels(stem_length);
+xheight:=6pt;
+penpos1 (2*stem_length,30); % normal points
+penpos2 (2*stem_length,30); % normal points
+penpos3 (2*stem_length,30); % normal points
+penpos4 (2*stem_length,30); % normal points
+
+x1l=x2=0; y1r=xheight; y2l=0;
+ penpos40(stem_length,30); z40r=round z1;
+ penpos41(stem_length,40); x40r=x41r=x42r; y41=.5[y40,y42];
+ penpos42(stem_length,30); y42l=y2;
+fill z40r--(x40r,y42l)--z42l...z41l{up}...z40l--cycle; % left stem
+
+x3=x4r=w; y3=y1; y4=y2;
+ penpos50(stem_length,30); z50l=round z3l;
+ penpos51(stem_length,40); x50l=x51l=x52l; y51=.5[y50,y52];
+ penpos52(stem_length,30); y52l=y4;
+fill z52l--(x52l,y50r)--z50r...z51r{down}...z52r--cycle; % right stem
+
+ penpos10(stem_length,30); z10=z42;
+ penpos11(stem_length,25); x11=.5[x10,x12]; y10l=y11=y12r;
+ penpos12(stem_length,30); x12r=x4; % redundant: y12l=0;
+ penpos14(stem_length*(1+cosd30),30); z14l=z12l;
+ penpos15(.07stem_length,120); z15l=z14r;
+fill z10l...z11l{z12-z10}...z12l--z14r
+ --z15r{z14l-z14r}...z11r{z10-z12}...z10r--cycle; % lower join
+
+numeric ch; ch=10; % Neenie's version was more like ch=7.5 (steeper)
+numeric s_length[];
+ s_length0*cosd(30-ch)=stem_length*cosd 30;
+ s_length1*cosd(40-ch)=stem_length*cosd 40;
+pair corner; corner=z50r;
+vardef f(expr theta)=
+ save x,y; penpos60(s_length0,theta); y60r=h; x60l=0;
+ angle(z60r-corner)<theta+60+ch enddef;
+numeric theta; theta=solve f(90,0);
+ penpos60(s_length0,theta); y60r=h; x60l=0;
+ penpos61(s_length1,theta+10); z61l=.5[z60l,z62l];
+ penpos62(s_length0,theta); z62r=corner;
+fill z60l--((z60l--z62l)intersectionpoint((x4,0)--(x4,h)))
+ --z62r...z61r{z60-z62}...z60r--cycle; % diagonal
+
+charwd:=charwd+1.03277pt#; w:= w + round(1.03277pt);
+penlabels(1,2,3,4,10,11,12,13,14,15,40,41,42,50,51,52,60,61,62);
+interim xoffset:=.46687pt; interim yoffset:=-.3pt;
+endchar;
+
+bye