% ASTROSYM.CAL : AstroSym (Version 2.20, Aug. 10, 2002) - file 5 of 8
% Peter Schmitt eMail: Peter.Schmitt@univie.ac.at
% Institute of Mathematics, University of Vienna Vienna, Austria
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
beginchar(O+0,U#,U#,0u#); "Sol";
D:=2P; % diameter of central circle
corners; centers;
PEN; draw BC..CL..TC..CR..BC..cycle; % main circle
Pen; draw fullcircle scaled D shifted CC; % central circle
endchar;
beginchar(O+1,46u#,80u#,16u#); "Mercurius";
corners; centers;
VV:=(CC-CL) rotated 90;
bC := CC-VV;
VV:=2VV+vP/3;
tL:=CL+VV; tC:=CC+VV; tR:=CR+VV;
R:=length(tL-hd-tC); % upper circle: outer radius
s:=length(TC+vd-tC); a:= angle(R+-+s,s); % upper partial sector: angle
Tl:= (tL-hd) rotatedaround (tC,-a); % upper circle: outer endpoints
Tr:= (tR+hd) rotatedaround (tC, a);
tl:= (tL+hd) rotatedaround (tC,-a+10); % upper circle: inner endpoints
tr:= (tR-hd) rotatedaround (tC, a-10);
D:=length(CR-CL); % central circle: diameter
SPEN; cross (bC,BC, 3/2,-2P); % bottom cross
PEN;
draw fullcircle scaled D shifted CC; % central circle
Pen; Fill
( Tl..(tL-hd){down}..{up}(tR+hd)..Tr % upper circle: outside
& Tr--tr
& tr..(tR-hd){down}..{up}(tL+hd)..tl % upper circle: inside
& tl--Tl--cycle
);
endchar;
beginchar(O+5,44u#,70u#,0u#); "Iuppiter";
Corners (P,0,0,P); Centers (2/3,2/7); Top (6/7);
RPEN; draw tC--BC; % right vertical bar
RPEN rotated 90; draw (CL+hd)--CR; % horizontal bar
Pen; Fill % left vertical arc
( (CL-vd-hd){tC-CL}..{TL-CC}(TL+(1-sqrt2)*vP-hd) % - left
& (TL+(1-sqrt2)*vP-hd)--(TL+vd-(1-sqrt2)*hP) % - top
& (TL+vd-(1-sqrt2)*hP){CC-TL}..{CL-tC}(CL-vd+hd) % - right
& (CL-vd+hd)--(CL-vd-hd) % - bottom
& (CL-vd-hd)..cycle
);
endchar;
beginchar(O+6,44u#,72u#,12u#); "Saturnus";
Corners (P,P,d+P,P);
Centers (1/6,5/9); % BC and TC : left vertical bar
RT (1/2,1); % bR : right arc (right)
HOR (0,1/3); Top (6/7); % tl and tr : upper horizontal bar
BOT (2/3,7/9); Bl:=Bl-vd; % Bl
Br:=Br-(0,d)+((P-(P*sqrt(2))*sind(45+20),0) rotated -70); % Br
SPEN; draw tl--tr; draw BC--TC; % left cross
PEN; draw CC{dir 20}..{down}bR..{dir250}Bl..{dir-70}Br; % right arc
RPEN rotated 20; draw Br--(Br+(hP rotated -70)); % sharpen arc end
endchar;
beginchar(O+11,1U#,72u#,2u#); "Aries";
Corners(p,p,p+d,p);
BOT (1/2,1/2);
% upper boundary :
vv:=7vd; % estimated correction
bl:=Bl+vv; br:=Br+vv; % bl = br : lower middle point
TOP (1/6,5/6); % (temporary) Tl and Tr : upper arcs (tops)
HH:= Tl-TL; VV:= HH rotated -90;
tr:=Tr+VV; % tr : right upper halfcircle (centre)
D:=length(tr-br); R:=length(HH); s:=D+-+R; % calculating direction of bar
b:=angle(s,R); b:=b+angle(tr-br);
Tr:=tr+(HH rotated (b+90)); % Tr : (left endpoint)
tR:=tr+(HH rotated (b-90)); % tR : (right endpoint)
tl:=Tl+VV; a:=180-b; % tl : left upper halfcircle (centre)
Tl:=tl+(HH rotated (a-90)); % Tl : (right endpoint)
tL:=tl+(HH rotated (a+90)); % tL : (left endpoint)
% lower boundary :
s:=2(P-p)/sind(90-b); % caculating |Bl-bl|
Bl:= bl-(0,s); Br:=br-(0,s);
t:=2(P-p)/length(HH);
tl:=Tl-t*(HH rotated (a-90)); % left upper halfcircle: right endpoint
tr:=Tr-t*(HH rotated (b+90)); % right upper halfcircle: left endpoint
Pen; Fill
( bl--Tl{dir a}..{dir (a-180)}tL % left part: upper boundary
& tL..(tL+(1,0)) % avoiding strange path
{dir (a-6)}..{dir (a-180)}tl--Bl % left part: lower boundary
& Bl--bl..cycle
);
Fill
( br--Tr{dir b}..{dir (b-180)}tR % right part: upper boundary
& tR..(tR-(1,0)) % avoiding strange path
{dir (b+6)}..{dir (b-180)}tr--Br % right part: lower boundary
& Br--br..cycle
);
endchar;
beginchar(O+12,1U#,72u#,8u#); "Taurus";
Corners(P,P,P,p);
Centers (1/2,5/9); % BC and CC : lower circle (top and bottom)
HOR (1/8,7/8); % Tl and Tr : upper arcs (tops)
Bot (5/18); % bl and br : lower circle (left and right)
LFT (0,4/5); RT (0,4/5); % tL and tR : upper arcs (left and right)
Pen; Fill
( Tl{dir 223}..{down}(tL-hd)..(CC-vd) % left upper arc: outside
..(br-hd)..(BC+vd)..(bl+hd)..(CC-vd) % lower circle: inside
..{up}(tR+hd)..{dir 137}Tr % right upper arc: outside
& Tr{dir -47}..{down}(tR-hd/2+vd/2)..(CC+vd) % right upper arc: inside
..(bl-hd)..(BC-vd)..(br+hd)..(CC+vd) % lower circle: outside
..{up}(tL+hd/2+vd/2)..{dir 47}Tl % left upper arc: inside
& Tl..Tl..cycle
);
endchar;
beginchar(O+13,56u#,72u#,8u#); "Gemini";
Corners (p,p,p,p);
HOR (2/7,5/7);
Top (7/8); Bot (1/8);
Pen; Fill ( BL..(bl-vd)..(br-vd)..BR % bottom arc: lower boundary
& BR..(br+vd)..(bl+vd)..BL % bottom arc: upper boundary
& BL--cycle
);
Fill ( TL..(tl-vd)..(tr-vd)..TR % top arc: lower boundary
& TR..(tr+vd)..(tl+vd)..TL % top arc: upper boundary
& TL--cycle
);
RPEN; draw tl--bl; draw tr--br; % left and right vertical bar
endchar;
beginchar(O+14,80u#,68u#,0u#); "Cancer";
corners; centers;
Cl:=2/7[CL,CR]; RT (0,4/5);
PEN; draw CL{up}..{down}Cl..{up}CL; % left circle
Pen; Fill ( (CL-hd){up}..{right}(TC+vd)..tR % upper arc: upper boundary
& tR..{left}(TC-vd/2)..{down}(CL+hd) % upper arc: lower boundary
& (CL+hd)--(CL-hd)..cycle
);
picture upper; upper := currentpicture; % adding rotated copy
addto currentpicture also upper rotated 180 shifted 2CC;
endchar;
beginchar(O+15,68u#,80u#,10u#); "Leo";
Corners(P,p,d+P,P); centers; % TC
HOR (1/6,17/20); Top (3/4); % tl and tr : main arc (left and right)
BOT (1/3,2/3); rr:=(Bl-BL)/2;
bL:=BL+(rr rotated 90); bl:=bL+2rr; % bL and bl : lower left circle
Br:=BR+hd-(2d,0)-vP; BR:=BR-vP; % Br and BR : lower right arc
PEN; draw bL{down}..{up}bl % lower left circle: lower arc
..{up}tl..{right}TC..{down}tr..{down}Br; % main arc
Pen; Fill % lower right arc
( (Br-hd){down}..{up}BR % outside
& BR{dir265}..{up}(Br+hd) % inside
& (Br+hd)--(Br-hd)..cycle
);
Fill ( (bL+hd){up}..bl % lower left circle: upper arc, ouside
& bl{up}..{down}(bL-hd) % inside
& (bL-hd)--(bL+hd)..cycle
);
endchar;
beginchar(O+16,100u#,68u#,10u#); "Virgo";
Corners (P,P,d,0);
LFT (0,3/4); % tL : left upper arc (left end)
HOR (1/3,2/3); Top (3/4); % tl and tr : upper arcs (endpoints)
TOP (4/14,4/14+1/3); % Tl and Tr : upper arcs (tops)
RT (1/5,3/4); % tR : right upper arc (right end)
% bR and tR : right vertical bar (ends)
TR:=(4/14+2/3)[TL,TR]; % TR : right upper arc (top)
bC:=.5[Bl,Br]-(0,d/2); % bC : lower right stroke (endpoint)
br:=Br-(0,d); % br : middle right bar (lower end)
Br:=Br+vP; % Br : lower right vertical stroke (left)
BR:=2/3[Br,BR+vP]; % BR : lower right vertical stroke (right)
RPEN; draw TL--BL; draw tl--Bl; draw tr--br; draw tR--bR; % vertical bars
Pen; Fill % left upper arc
( tL{dir 42}..{right}(Tl-4vp)..{down}(tl+hd) % upper boundary
& (tl+hd)--(tl-hd)
& (tl-hd){up}..(Tl-2vP-2vp)..{dir 215}tL..cycle % lower boundary
);
Fill % middle upper arc
( tl{dir 42}..{right}(Tr-4vp)..{down}(tr+hd) % upper boundary
& (tr+hd)--(tr-hd)
& (tr-hd){up}..(Tr-2vP-2vp)..{dir 215}tl..cycle % lower boundary
);
Fill % right upper arc
( tr{dir 45}..{right}(TR-1vp)..{down}(tR+hd) % upper boundary
& (tR+hd)--(tR-hd)
& (tR-hd){up}..(TR-2vd-0vp)..{dir 215}tr..cycle % lower boundary
);
PEN; draw bR{dir250}..{dir190}BR--Br; % lower right stroke: right part
Pen; Fill
( (Br+vd){left}..{dir 235}bC % lower right stroke: left part
& bC{dir 50}..{right}(Br-vd)
& (Br-vd)--(Br+vd)..cycle
);
endchar;
beginchar(O+17,64u#,56u#,-8u#); "Libra";
corners;
Centers (1/2,7/15); % CL and CR : upper bars (outer ends)
TOP (1/4,3/4);
VV:=(TC-Tl) rotated -90;
tl:=Tl+VV; tr:=Tr+VV; % tl and tr : upper arc (left and right)
R:=length(VV); D:=length(TC-CC); % calculating intersection of
t:=(R+-+(D-R))/length(BR-BL); % upper arc with upper bars
HOR (1/2-t,1/2+t); Bot (7/15); % (bl and cl renamed:)
Cl:=bl; Cr:=br; % Cl and Cr : upper arc (inner ends)
% Cl:=bl+hP; Cr:=br-hP; % Cl and Cr : upper arc (inner ends)
bL:=CL-vP; bl:=Cl-vP; br:=Cr-vP; bR:=CR-vP; % shift upper bars slightly down
% bL:=CL; bl:=Cl; br:=Cr; bR:=CR; % shift upper bars slightly down
SPEN; draw BL--BR; % bottom bar
SPEN; draw bL--bl; draw br--bR; % left and right upper bars
Pen; Fill % left upper bar: left end
( CL{dir 170}..{dir 105}(CL+vd-hd) % inner boundary
& (CL+vd-hd)--(CL-hd)--CL % left and lower boundary
& CL.. cycle
);
Pen; Fill % right upper bar: right end
( CR{dir 10}..{dir 75}(CR+vd+hd) % inner boundary
& (CR+vd+hd)--(CR+hd)--CR % right and lower boundary
& CR.. cycle
);
PEN; draw Cl..{up}tl..{right}TC..{down}tr..Cr; % upper arc
endchar;
beginchar(O+18,(14/15)*100u#-(13/15)*P#+p#,68u#,10u#); "Scorpio";
Corners (P,p,d,0);
LFT (0,3/4); % tL : left upper arc (left end)
HOR (5/14,10/14); Top (3/4); % tl and tr : upper arcs (endpoints)
TOP (4/14,9/14); % Tl and Tr : upper arcs (tops)
RT (1/6,1); % bR : lower right arrow (point)
br:=1/3[Br,BR]-(0,d)+vp; % br : lower right arc (bottom)
BR:=2/3[Br,BR]+vp; % Br and BR : lower right arc (endpoints)
RPEN; draw TL--BL; draw tl--Bl; draw tr--Br; % vertical bars
Pen; Fill % left upper arc
( tL{dir 42}..{right}(Tl-4vp)..{down}(tl+hd) % upper boundary
& (tl+hd)--(tl-hd)
& (tl-hd){up}..(Tl-2vP-2vp)..{dir 215}tL..cycle % lower boundary
);
Fill % right upper arc
( tl{dir 42}..{right}(Tr-4vp)..{down}(tr+hd) % upper boundary
& (tr+hd)--(tr-hd)
& (tr-hd){up}..(Tr-2vP-2vp)..{dir 215}tl..cycle % lower boundary
);
Fill % lower right arc
( (Br+hd){down}..{right}(br+vd)..{dir angle((br-BR) rotated 0)}BR
& BR{dir angle((BR-br) rotated 6)}..{left}br..{up}(Br-hd)
& (Br-hd)--(Br+hd)..cycle
);
arrow (BR+2hp,bR, 1, 1/4,1/2); % lower right arrow
endchar;
beginchar(O+19,56u#,80u#,8u#); "Sagittarius";
Corners(P*(h+d)/((h+d)++w),p,P*w/((h+d)++w),p);
bl:=(1/5)[BL,TR]; tr:=(3/4)[BL,TR];
VV:=TR-BL; a:=angle(VV);
HH:= VV/8 rotated 90;
bL:= bl+HH; Bl:= bl-HH;
RPEN rotated (a+90); draw BL--tr; % shaft
RPEN rotated a; draw bL--Bl; % short bar
Pen; arrow (tr,TR, 6/7, .3,.6); % point
endchar;
beginchar(O+20,56u#,1U#,0); "Capricornus";
Corners(p,p,p,p); % TR: top bar (right end)
Centers (2/3,2/3); % BC and CC: loop (bottom and top)
HOR (1/3,1); Bot (1/3); % bl and br: loop (left and right)
TOP(1/4,1); Tl:=Tl-hd; % Tl: top bar (left end)
LFT (.45,1); % bL: end of loop
Pen; Fill
( Tl--TR % top bar: upper boundary
& TR{dir225}..{down}(bl+hd)..{right}(BC+2vd) % loop from TR to bL
..{up}(br-2hd)..{left}(CC-.5vd-hd)..bL
& bL..{right}(CC+.5vd)..{down}br..{left}BC % loop back from bL to TR
..{up}(bl-hd)..{dir45}(TR-2vd-3hd)
& (TR-2vd-3hd)--(Tl-2vd)--Tl % top bar: lower boundary
& Tl..Tl..cycle
);
endchar;
beginchar(O+22,56u#,72u#,8u#); "Pisces";
Corners(p,p,p,p);
HOR (1/4,3/4); Top (1/2);
Pen; Fill ( BL..(tl-hd)..TL % left arc: left boundary
& TL..(tl+hd)..BL % left arc: right boundary
& BL--cycle
);
Fill ( BR..(tr-hd)..TR % right arc: left boundary
& TR..(tr+hd)..BR % right arc: right boundary
& BR--cycle
);
PEN; draw tl--tr; % vertical bar
endchar;
beginchar(O+23,44u#,72u#,12u#); "Saturnus 2";
corners; Centers (4/9,8/11);
HOR (0,8/9); Top (19/22);
RT (6.3/11,1); % bR
Bl:=2/9[BL,BR]; Bot(.8/12); % bl
bC:=1/5[BC,TC]; % bC
Bl:=Bl+((P-(P*sqrt(2))*sind(45+20),0) rotated -70); % Bl
SPEN; draw tl--tr; draw CC--TC; % upper cross
PEN; draw CC{right}..{down}bR..bC..{dir250}bl..{dir-70}Bl; % lower arc
RPEN rotated 20; draw Bl--(Bl+(hP rotated -70)); % sharpen arc end
endchar;
beginchar(O+27,76u#,50u#,-22u#); "Aquarius 2";
Corners (p,p,p,p);
% upper strokes:
Centers (3/5,1/2); % CL and CC : left stroke (left end, right bottom)
TOP (1/4,4/5); % Tl and Tr : left stroke (left top, right end)
Pen;
Fill ( (CL+vp)..{right}Tl..{right}(CC+vd)..(Tr-vP) % left stroke: upper
& (Tr-vP)..{left}(CC+vp)..{left}(Tl-2vd)..(CL+vp) % left stroke: lower
& (CL+vp)..cycle
);
Fill ( (Tr+hP/2)..{right}(CR+2vd) % right stroke: upper
& (CR+2vd){-hP/2-2vd}..{left}(CR-hP+vp) % right stroke: lower
..(Tr-2vd-hP/2) % ( from Tr to CR )
& (Tr-2vd-hP/2)--(Tr+hP/2) % right stroke: left end
& (Tr+hP/2)..cycle
);
picture upper; upper:= currentpicture; % lower strokes
addto currentpicture also upper shifted (0,-(h+d)/2);
endchar;
beginchar(O+28,78u#,56u#,-9u#); "Aquarius 3";
Corners(p,p,(h+d)/2+P,P);
% upper stroke : points on central line:
centers; % CL and CR : ends
HOR (1/5,3/5); Bot(1/2); % bl and br : down crossing
HOR (2/5,4/5); Top(1/2); % tl and tr : up crossing
PEN;
draw bl{down}..tl{up}..br{down}..tr{up}; % middle part
Pen; Fill
( CL{up}..{down}(bl+hd) % left end : upper boundary
& (bl+hd)--(bl-hd)
& (bl-hd){up}..{dir 225}CL % lower boundary
& CL..cycle
);
Fill ( CR{up}..{down}(tr-hd) % right end : upper boundary
& (tr-hd)--(tr+hd)
& (tr+hd){up}..{dir -45}CR % lower boundary
& CR..cycle
);
picture upper; upper:= currentpicture; % lower stroke
addto currentpicture also upper shifted (0,-(h+d)/2);
endchar;
beginchar(O+29,U#,U#,0u#); "Terra 2"; % for smaller circle : 52u#,U#,0#
corners; centers;
VV:=(BC-BL) rotated 90;
TC:=CC+VV; BC:=CC-VV;
PEN; draw TC..CR..BC..CL..TC..cycle; % circle
draw BC--TC; draw CL--CR; % cross in circle
s:=1+1/2;
CL:=CL+s*hP; CR:=CR-s*hP;
BC:=BC+s*vP; TC:=TC-s*vP;
PEN scaled 1/2; undraw TC..CR..BC..CL..TC..cycle;
endchar;
beginchar(O+32,88u#,56u#,0); "Libra 3"; % larger variant
corners;
Centers (1/2,7/15); % CL and CR : upper bars (outer ends)
TOP (1/4,3/4);
VV:=(TC-Tl) rotated -90;
tl:=Tl+VV; tr:=Tr+VV; % tl and tr : upper arc (left and right)
R:=length(VV); D:=length(TC-CC); % calculating intersection of
t:=(R+-+(D-R))/length(BR-BL); % upper arc with upper bars
HOR (1/2-t,1/2+t); Bot (7/15); % (bl and cl renamed:)
Cl:=bl; Cr:=br; % Cl and Cr : upper arc (inner ends)
bL:=CL-vP; bl:=Cl-vP; br:=Cr-vP; bR:=CR-vP; % shift upper bars slightly down
%% CL:=CL+8u;CR:=CR+8u; % left and right points
CL:=1/3[bL,TL];CR:=1/3[bR,TR]; % left and right points
SPEN; draw BL--BR; % bottom bar
SPEN; draw bL--bl; draw br--bR; % left and right upper bars
Pen; Fill % left upper bar: left end
( bl{dir 175}..{dir 100}(CL+vd-hd) % inner boundary
& (CL+vd-hd)--(bL-hd)--bl % left and lower boundary
& bl.. cycle
);
Pen; Fill % right upper bar: right end
( br{dir 5}..{dir 80}(CR+vd+hd) % inner boundary
& (CR+vd+hd)--(bR+hd)--br % right and lower boundary
& br.. cycle
);
PEN; draw Cl..{up}tl..{right}TC..{down}tr..Cr; % upper arc
endchar;
beginchar(O+42,10/11U#,U#,0u#); "(moon) last quarter - inverse";
Corners(p,p,p,p); Centers(4/11,1/2);
b:=1; % reduction of stroke breadth
% outer circumference: big circle
VV:=(TL-BL)/2; HH:=VV rotated -90;
BC:=BL+HH; TC:=TL+HH; % CL=BL+VV;
MM:=CL+HH;
% outer circumference: calculating small circle
R:=length(HH); D:=length(BR-BL);
s:=(R+-+(D-R)); t:=s/2R;
CC:=CC+hP;
D:=length(CR-CC);
r := D/2 + s*s/2D;
RT (1/2-t,1/2+t);
mm:=CC+(r,0);
% inner circumference:
D:=length(mm-MM); R:=R-2(b*P-p); r:=r+2b*(P-p);
a:=(R*R-r*r+D*D)/2D;
tr:=MM+(a,R+-+a);
br:=MM+(a,-(R+-+a));
Fill ( tR..CL..bR
& bR..CC..tR
& tR..cycle
);
% unfill tr..(CL+2b*hd)..br % for standard variant \char10
% & br..(CC-2b*hd)..tr
% & tr..cycle;
endchar;
temp := currentpicture;
beginchar(O+43,10/11U#,U#,0u#); "(moon) first quarter - inverse";
currentpicture := temp xscaled -1 shifted (w,0);
endchar;
beginchar(O+10,10/11U#,U#,0u#); "Luna = (moon) last quarter";
currentpicture := temp;
unfill tr..(CL+2b*hd)..br
& br..(CC-2b*hd)..tr
& tr..cycle;
endchar;
temp := currentpicture;
beginchar(O+41,10/11U#,U#,0u#); "(moon) first quarter";
currentpicture := temp xscaled -1 shifted (w,0);
endchar;
beginchar(O+52,1.4U#,1.05U#,.35U#); "Pallas";
Corners (p,p,P,p); Centers (.5,.4);
numeric aa[]; pair Cl,Cr,tC;
RR:= 2(vP-vp);
Cl = aa1[CL,TC] + ( RR rotated -120 ) = aa2[CL,CR] + RR;
Cr = aa3[CR,TC] + ( RR rotated 120 ) = aa4[CL,CR] + RR;
tC = aa5[CR,TC] + ( RR rotated 120 ) = aa6[CL,TC] + ( RR rotated -120 );
Pen; Fill (
TC--CL--CR--TC & TC--tC % top triangle : outside
& tC--Cr--Cl--tC & tC--TC & cycle % top triangle : inside
) ;
SPEN; cross (CC,BC, 1,-P); % bottom cross
endchar;
a:=(sqrt3)/2; % ratio (equilateral triangle)
% used chars ( 58 60 ) 61 ( 63 )
beginchar(O+61,(U#+2P#)/a+2P#,U#+2a*P#,2P#); "Trigon";
Corners (p,p,p,p); centers;
numeric aa[]; pair Bl,Br,tC;
RR:= 2(vP-vp);
Bl = aa1[BL,TC] + ( RR rotated -120 ) = aa2[BL,BR] + RR;
Br = aa3[BR,TC] + ( RR rotated 120 ) = aa4[BL,BR] + RR;
tC = aa5[BR,TC] + ( RR rotated 120 ) = aa6[BL,TC] + ( RR rotated -120 );
Pen; Fill (
TC--BL--BR--TC & TC--tC % triangle : outside
& tC--Br--Bl--tC & tC--TC & cycle % triangle : inside
) ;
endchar;
beginchar(O+64,68u#,80u#,0); "ascending node of moon";
Corners(P,P,P,P); centers; % TC
HOR (1/6,5/6); Top (3/4); % tl and tr : main arc (left and right)
BOT (1/3,2/3); rr:=(Bl-BL)/2;
bL:=BL+(rr rotated 90); bl:=bL+2rr; % bL and bl : lower left circle
bR:=BR+(rr rotated 90); br:=bR-2rr; % bR and br : lower right circle
PEN; draw bL{down}..{up}bl % lower left half circle
..{up}tl..{right}TC..{down}tr % main arc
..{down}br..{up}bR; % lower right half circle
Pen;
Fill ( (bL+hd){up}..bl-(1,0)--bl % lower left circle: upper arc, outside
& bl{up}..{down}(bL-hd) % inside
& (bL-hd)--(bL+hd)..cycle
);
Fill ( (bR-hd){up}..br+(1,0)--br % lower right circle: upper arc, outside
& br{up}..{down}(bR+hd) % inside
& (bR+hd)--(bR-hd)..cycle
);
endchar;
temp := currentpicture;
beginchar(O+65,68u#,80u#,0); "descending node of moon";
currentpicture := ( temp yscaled -1 ) shifted ( 0,h );
endchar;
endinput;
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%%% end of ASTROSYM.CAL %%%