OBSERVATION 013
帯
Obi — Sash
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.
A twist travels from one end to the other.
Where it turns over, light collects.
It is bright not because it is thicker there.
Only at the moment the surface faces us is its full width visible at once.
While it is edge-on, the sash is almost a line.
The same sash, by orientation alone,
becomes a line, then a surface.
Read and verify the equation
(i, t,
u = i * .618034 % 1, v = (i * .754878 % 1) * 2 - 1,
z = 1.25 * sin(u * 4 - t * 2) + .6 * sin(u * 7 + t),
w = 64 * sin(PI * u ** .8) ** .5,
y = 200 + 64 * sin(u * 3 - t * 2) * (.3 + u * .7),
Q = [26 + 348 * u, y + v * w * cos(z) + v * w * sin(z) * .3],
Dx = 200 + 55 * sin(t + 2.75) + 22 * sin(t * 2 + 4.67),
Dy = 200 + 58 * cos(t + 3.58) + 16 * sin(t * 3 + 2.75)
) => [Dx + (Q[0] - 200) * .68, Dy + (Q[1] - 200) * .68]
Fingerprint of this equation
sha256:d05ea8ee47261ff0f753c8f73f1c85446c7e66931b4271330acccce2bf72af5e
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 →