OBSERVATION 049
磯巾着
Isoginchaku — Sea Anemone
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 base stays where it is.
Thirty tentacles sway with different delays.
Even when their tips sweep far, the base remains in place.
The whole looks like one, though its movements do not align.
At six hundred and twenty-five points, the spaces between tentacles widen.
At one, you can no longer see what the point was attached to.
Is this body swaying?
Or is something invisible moving around it?
Read and verify the equation
(i, t, p = i < 7000 ? 0 : i < 10000 ? 1 : 2, j = p === 0 ? i : p === 1 ? i - 7000 : i - 10000, s = (j * .61803398875 % 1), b = (j * .75487766625 % 1) * TAU, m =
floor(j / 1000), a = m * TAU / 30, v = 1 - s, q = t * .25, spread = .88 + .12 * sin(q), r = (35 + 14 * v + 4 * sin(PI * s) * sin(q * 2 - s * 3)) * (1 + .045 * v
* cos(16 * b)), z = .75 * t - a, tx = (95 + 18 * sin(z - 1.2)) * cos(a) + 14 * sin(z * 2 + a) , ty = 166 + 30 * sin(a) + 30 * sin(z - 1.8), Q = p === 0 ? [r *
cos(b) * (1 - s + s / spread), 216 + 95 * s + 15 * v * sin(b)] : p === 1 ? [(20 + 29 * s) * cos(b), 216 + (6 + 9 * s) * sin(b)] : [49 * cos(a) * v ** 3 + 96 *
cos(a) * 3 * v * v * s + (120 * cos(a) + 9 * sin(z)) * 3 * v * s * s + tx * s ** 3 + (3.8 - 2.8 * s) * cos(b), (216 + 15 * sin(a)) * v ** 3 + (99 + 18 * sin(a)
+ 24 * sin(m * 2.13)) * 3 * v * v * s + (116 + 34 * sin(a) + 18 * sin(m * 2.13) + 20 * sin(z - .7)) * 3 * v * s * s + ty * s ** 3 + (3.8 - 2.8 * s) * sin(b)] ) => [200 + Q[0] * spread, Q[1]]
Fingerprint of this equation
sha256:7afd897d4c083423b26df76f354ee0dbb6978e131563b9ccbf8bae3f5b9476d5
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 →