OBSERVATION 004
潮
Ushio — Tide
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 flow is going around an obstruction.
Having gone around, it joins again on the far side.
The empty space in the middle is not a hole painted in.
It is only that no flow can enter there.
No line was erased. Not one has ever passed through.
The flow strikes nothing, goes around, and returns to what it was.
Through all of it, no path is ever broken.
Read and verify the equation
(i, t,
j = i / 4 | 0, c = i % 4,
m = j % 34, e = m % 2 ? 1 : -1,
C = 8 + 15 * (m / 2 | 0),
s = ((j / 34 | 0) / 294 + t / TAU * 1.5 + c * .0012) % 1,
p = PI * (1 - s), q = sin(p),
r = (C + sqrt(C * C + 14400 * q * q)) / (2 * q),
x = r * cos(p) * .62, y = e * r * q * .62
) => (i % 9) / 9 < max((abs(x) - 108) / 86, (abs(y) - 96) / 58) ? [-9, -9]
: [200 + x, 200 + y]
Fingerprint of this equation
sha256:7fdc1bad786aa2d0d0bcd3bec684b7f52f8e60c52b8177a498b4caab3a4e9cc3
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 →