Show HN: I built an interactive 3D three-body problem simulator in the browser (structuredlabs.github.io)

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

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

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

Very cool! nice to be able to export json too

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.

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

No Weber very sad.

The tri-Solarians could have just used this!

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

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

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

- 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

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

But I thought Terrence Howard solved it already /s