OBSERVATION 036
往来
Ōrai — Coming and Going
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.
Points circle a ring. There is a flow going, and a flow returning.
Two stretches of stillness travel the ring at different speeds.
When the flow enters one, the points are not drawn.
Even the vanished points keep circling inside the equation.
Past the stretch, they appear again.
To be, or not to be there —
what decides it is not any property of the point.
It is the interval the equation places it in.
Reduce the points and the same thing happens.
At one point, the line becomes a broken arc.
While that point is inside a stillness, its old trail gradually fades.
This coming and going brings money to mind.
A thing received, and handed on.
What becomes visible only while it is passing between us?
Read and verify the equation
(i, t,
st = i % 40, p = (i / 40 | 0) / 999, dr = st % 2 * 2 - 1,
u1 = st * .618034 % 1, v = i * .754878 % 1,
a = p * TAU + dr * t * .5,
r = 96 + 34 * (u1 - .5) + 12 * sin(a * 3 + st * .7 - dr * t * .25) + 5 * sin(a * 7 + u1 * TAU),
S1 = max(0, sin(a - t * .75 + 1.2)) ** 6, S2 = max(0, sin(a + t * .25 + 4.4)) ** 6,
S = max(S1, S2)
) => v < S ? [-9, -9]
: [200 + r * cos(a), 200 + r * sin(a) * .78 + 8 * sin(a * 2 - dr * t * .25)]
Fingerprint of this equation
sha256:78abcd2373728975ae69eea120c723ef8eb8962ab0b33f6cf4e8bb165d6bef21
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 →