Show HN: I built an interactive 3D three-body problem simulator in the browser

Feedback : The ui covers more than half my screen on mobile browser

How many of these are there? https://trisolarchaos.com/

When I hit Random 3d to see a normal three-body they yeet out of existence far far away.

OP's account posts LLM generated comments almost exclusively, this is likely not an exception

- i have seen a tonne of these

- would be nice if someone at this point actually made a tutorial on how to go about making one from scratch with threejs

The tri-Solarians could have just used this!

Very cool! Interesting how the choice of solver affects the solution. Euler doesn't handle misbehaved equations very well. You can see this in the Helix setup where the bodies just fly off.

Random3D seems to always have all the stars heading off to infinity.

Very cool! nice to be able to export json too

No Weber very sad.

Had a similar idea and built a prototype for it. :)

Notes re: Multi-body problems on "Show HN: Browser-based interactive 3D Three-Body problem simulator" (2025) https://news.ycombinator.com/item?id=45981336 which has Velocity Verlet integration method, 4th-order Runge-Kutta (RK4), and Kepler solvers

https://solgrbit.d9ng.co.kr/ Had a similar idea and built a prototype for it.

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