I liked the combination of gravity with bouncy walls - not a combination I've seen before! So I reworked the physics a little:

• Make orbital mechanics a bit more realistic (remove tangential component of acceleration)
• Initialize velocities to produce orbits that are closer to circular, on average
• Conserve energy on collision with walls
• Initialize starting positions uniformly across the screen
• Smaller timestep for less frenetic motion

Things that aren't present but might be fun to add:

• particle-particle interactions (maybe both gravity and collision?)
• hacks to make sure energy is conserved over longer runs
• something controllable!

It's possible there are mistakes but the behavior looks at least roughly right to me so I thought I'd post it anyway.

Orbit test (r1 / luchak)

by luchak

Cart #fbutuhiku-0 | 2021-12-17 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA