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.PS
#Euro.m4
gen_init
divert(-1)
`euro_simple([height])
Basic euro symbol with round outer boundary
default height=10pt'
define(`euro_simple',
`[ linethick = 0
orad = ifelse(`$1',,`5bp__',(`$1')/2)
u = orad/6
irad = orad - u
C: (0,0)
D: C+(Rect_(irad,40))
CD: move from C+(0,-orad) to D
DK: move from D down u
Ubot: move from C+(0,u/2) right u
Utop: move from Ubot.start+(0,u) right u
Ltop: move from C+(0,-u/2) right u
Lbot: move from Ltop.start+(0,-u) right u
L_edge: C-(7.5*u,0)
Start: (C,Utop)
slope = (CD.end.y-CD.start.y)/(CD.end.x-CD.start.x)
shade(0,
line from Start to Intersect_(Utop,CD) \
then to Intersect_(Ubot,CD) \
then to LCintersect(Ubot,C,irad)
arc to LCintersect(Ltop,C,irad) with .c at C
line to Intersect_(Ltop,CD) \
then to Intersect_(Lbot,CD) \
then to LCintersect(Lbot,C,irad)
arc to (D,C)-(0,D.y-C.y) with .c at C
line to LCintersect(DK,C,orad,R)
arc cw to LCintersect(Lbot,C,orad) with .c at C
line to (L_edge,Here) \
then right u/slope up u \
then to LCintersect(Ltop,C,orad)
arc cw to LCintersect(Ubot,C,orad) with .c at C
line to (L_edge,Here) \
then right u/slope up u \
then to LCintersect(Utop,C,orad)
arc cw to LCintersect(CD,C,orad,R) with .c at C
line to D
arc to LCintersect(Utop,C,irad) with .c at C
line to Start
) ]')
`euro_symbol([ht=val; aspect=val; slant=degrees])
Euro symbol with variable aspect ratio and slant
defaults: ht=10pt, aspect=1, slant=0
e.g., euro_symbol(ht=14pt__; aspect=1.2)'
define(`euro_symbol',`[
setkey_(`$1',ht,10pt__) setkey_(`$1',aspect,1) setkey_(`$1',slant,0)
linethick = 0
orad = m4ht/2
u = orad/6
irad = orad - u
if m4aspect==0 then { squeeze = 1 } else { squeeze = 1/m4aspect }
slant = sind(m4slant)
C: (0,0)
D: C+(Rect_(irad,40))
CD: move from C+(0,-orad) to D
DK: move from D down u
Ubot: move from C+(0,u/2) right u
Utop: move from Ubot.start+(0,u) right u
Ltop: move from C+(0,-u/2) right u
Lbot: move from Ltop.start+(0,-u) right u
L_edge: C-(7.5*u,0)
Start: (C,Utop)
slope = (CD.end.y-CD.start.y)/(CD.end.x-CD.start.x)
shade(0,
S: LCintersect(Ubot,C,irad)
line from euro_tr(Start) to euro_tr(Intersect_(Utop,CD)) \
then to euro_tr(Intersect_(Ubot,CD)) \
then to euro_tr(S)
euro_arc(S,LCintersect(Ltop,C,irad),irad)
S: LCintersect(Lbot,C,irad)
line to euro_tr(Intersect_(Ltop,CD)) \
then to euro_tr(Intersect_(Lbot,CD)) \
then to euro_tr(S)
euro_arc(S,((D,C)-(0,D.y-C.y)),irad)
S: LCintersect(DK,C,orad,R)
line to euro_tr(S)
euro_arc(S,LCintersect(Lbot,C,orad),orad,cw)
S: LCintersect(Ltop,C,orad)
E: LCintersect(Lbot,C,orad)
line to euro_tr((L_edge,E)) \
then to euro_tr((L_edge,E)+(u/slope,u)) \
then to euro_tr(S)
E: LCintersect(Ubot,C,orad)
euro_arc(S,E,orad,cw)
S: LCintersect(Utop,C,orad)
line to euro_tr((L_edge,E)) \
then to euro_tr((L_edge,E)+(u/slope,u)) \
then to euro_tr(S)
euro_arc(S,LCintersect(CD,C,orad,R),orad,cw)
line to euro_tr(D)
euro_arc(D,LCintersect(Utop,C,irad),irad)
line to euro_tr(Start)
) ]')
`aspect ratio and slant transformation'
define(`euro_tr',`((`$1').x*squeeze+(`$1').y*slant,(`$1').y)')
`transformed arc, centre C'
define(`euro_arc',
`M4X: `$1'; as = atan2(M4X.y-C.y,M4X.x-C.x)
M4X: `$2'; ae = atan2(M4X.y-C.y,M4X.x-C.x)
ifelse(`$4',cw,`if ae > as then { ae -= twopi_ }',
`if ae < as then { ae += twopi_ }')
ax = ae-as
n = max(5,ceiling_(abs(ax)/(10*dtor_)))
for i=0 to n do { P[i]: euro_tr((rect_(`$3',as+i/n*ax))) }
fitcurve(P,n)
move to P[n] ')
divert(0)dnl
euro_simple
move
euro_symbol(slant=15)
move
euro_simple(72bp__)
move
euro_symbol(ht=72bp__*2; aspect=1.0; slant=15)
.PE
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