PS
# Eye.m4
#
https://getpocket.com/explore/item/pillars-of-fire-truly-adventurous?utm_source=pocket-newtab
gen_init
define(`eye',`[ u = `$1'; v = 0.47*u; w = 0.25*u
# for pdf, linethick in shade must be environment
lth = linethick; linethick = 0
shade(1,
arc outlined "red" from (u/2,0) to (-u/2,0) with .c at (0,-u/3)
arc to (u/2,0) with .c at (0,u/3) )
linethick = lth
circle diam v fill_(0.25) at (0,0)
circle diam w fill_(0) at (0,0)
circle thick 0 diam last circle.diam/2 fill_(1) at last circle.nw
circle diam last circle.diam-lthick at last circle outlined graystring(0.9)
] ')
skale = 2/3
Bx: box wid 11*skale ht 8.5*skale fill_(0) at (0,0)
ane = atan2(Bx.ht,Bx.wid)*rtod_
d[5] = 0.92*Bx.ht
d[4] = 0.78*Bx.ht
d[3] = 0.62*Bx.ht
d[2] = 0.40*Bx.ht
d[1] = 0.25*Bx.ht
da = 1
dax = 360/64
C[0]: Bx.se; C[1]: Bx.nw
for a=-int(ane/dax)*dax to 180-ane by dax do {
T1: (Rect_(1,a+da)); T1: intersect_(Bx.ne,C[(a>ane)],Bx,T1)
T2: (Rect_(1,a)); T2: intersect_(Bx.ne,C[(a>ane)],Bx,T2)
line outlined "white" shaded "white" from Bx to T1 then to T2 then to Bx
line outlined "white" shaded "white" from Bx to T1*(-1) \
then to T2*(-1) then to Bx
}
for i=5 to 2 by -1 do {
C[i]: circle diam d[i] fill_(0) at Bx
for a=0 to 359 by dax do {
T1: (Rect_(d[i]/2,a))
T2: (Rect_(d[i]/2,a-da*2))
lth = linethick; linethick = 0
shade(1,
arc cw from T1 to T2 with .c at Bx
spline 0.55 thick 0 to 0.8 between Bx and T2 \
then to (Rect_(d[i]/4,a+30))
arc cw to (Rect_(d[i]/4,a+32)) with .c at Bx
spline 0.55 thick 0 to 0.8 between Bx and T1 then to T1 )
linethick = lth
}
}
C[1]: circle thick 2 diam d[1] at Bx fill_(0.1)
eye(d[1]-4bp__) at (0,0)
for a=0 to 359 by dax do {
T1: (Rect_(d[1]/2-1bp__,a))
T2: (Rect_(d[1]/2-1bp__,a+dax/2))
line thick 0 from T1 to T2 then to 0.5 between Bx and T2 \
then to 0.5 between Bx and T1 then to T1 shaded "white" #outlined "white"
}
PE
