OBSERVATION 027
烏賊
Ika — Squid
Press the picture or the button to reduce the points.40,000 → 625 → 40 → 1, then back to 40,000.
At fewer points, dots grow and trails linger to help you follow their paths.
“Listen” maps the displayed points to sound.Changing the count rebuilds the sound.
The mantle stays rigid.
What moves is only the fins along its sides.
A wave crosses the fins, front to back.
The ten arms do not swim.
They only follow, late, the motion the fins have made.
How late differs from arm to arm.
Match them and they become one bundle, and it is no longer a creature.
Because they lag unevenly, they look like they are hanging.
A rigid part, a part a wave crosses, and a part that only follows.
Three different speeds in one body.
Read and verify the equation
(i, t,
b = i < 13000, h = i >= 13000 && i < 25000,
c = (i * .754878 % 1) * PI, d = sqrt(i / 13000),
j = (i - 13000) % 2 ? 1 : -1, q = ((i - 13000) / 2 | 0) / 5999,
k = (i - 25000) % 10, s = ((i - 25000) / 10 | 0) / 1499,
wv = sin(q * 3.6 - t),
Q = b
? [200 + 34 * sin(d * 1.5708) * cos(c) * (1 - .12 * d),
104 + 34 * sin(d * 1.5708) * sin(c) * .5 + 116 * d * d]
: h
? [200 + j * (30 + 52 * max(0, sin(PI * q ** .8)) ** .7) + j * 7 * wv,
118 + 122 * q + 5 * wv]
: [200 + (k / 9 - .5) * 46 * (1 - .34 * s)
+ 15 * s ** 1.4 * sin(s * 3.4 - t - 1.5 - k * .42),
236 + 118 * s ** .92
+ 7 * s * sin(s * 5 - t - 1.2 - k * .3)],
Dx = 200 + 40 * sin(t * .25 + 4.7) + 16 * sin(t * .5 + 1.3),
Dy = 200 + 34 * cos(t * .25 + .8) + 12 * sin(t * .75 + 4.7)
) => [Dx + (Q[0] - 200) * .74, Dy + (Q[1] - 200) * .74]
Fingerprint of this equation
sha256:750da2edff10db7cd396820da96d54e0599317a77c28d6b44e2c3c7510cff513
The same point number and time give the same coordinates.
Trails and the appearance of points depend on rendering settings and the device.
The button above takes the equation out as it is. To count it again yourself:
pbpaste > f.txt && printf %s "$(cat f.txt)" | shasum -a 256
Take it and run it.What appears when you change the equation? Run and rewrite this equation →