Physics
Point-Charge Field
|E| ∝ 1 / r²
The electric field of a point charge falls off as one over distance squared, here a bright inverse-square halo tracking a charge as it circles the origin.
Computed & rendered in pure C# on the frozen OnlyCSharp 1.8 library — animation baked to GIF with the library's own
Gif encoder (no GPU, no ffmpeg, no external packages).