Fourier Machine — how spinning circles draw any shape

Fourier Machine

A circle is a sine wave seen edge-on — stack enough of them and they draw anything.

A · What to watch

B · Shape

An ellipse is exactly two circles, one spinning each way — compare the Ellipse Explorer.

Circles

Circles in the chain—

Animation

Speed

Show

view—

shape—

circles—

off by—

Circles by size

in usespare

Epicycles · a sum of rotating circles