Box3D
Fewer than 5 people recommend it so far, so there's no written verdict. Here is what commenters said.
4recommend
0warn against
Jul 1, 2026first mention
Jul 25, 2026latest mention
Why people recommend it
“check out #define BOX3D_DOUBLE_PRECISION 1 -- it's really good”
Show 3 more
“Great to finally see Box3D released!”
Bullet Physics authoron “Announcing Box3D :: Box2D”
“This is a great library and Erin deserves your support”
Caveats and dissent
No one in these comments warned against it.
Often compared with
Who recommends it in their own words
From the makers not counted in the ranking
“the original Box3D library in floats is guaranteed deterministic across ARM and x64 already”
Threads where it came up
- Announcing Box3D :: Box2D 10 mentions
- Fixed3D, a fixed point conversion of Box3D (box2d.org) 2 mentions
- SIMD for Collision 1 mention
Also written as box3d. Data: box3d.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.
All comments 12
“It looks like it supports NEON”
“check out #define BOX3D_DOUBLE_PRECISION 1 -- it's really good”
“Physics engines like Box3D have a significant amount of internal state and caching”
“I'm planning on adding full netcode support for box3d”
Have a look here, this guy maintains a wasm build of box2D https://github.com/Birch-san/box2d-wasm And Catto said, Box3D is very similar to Box2D.
“Great to finally see Box3D released!”
“This is absolutely fantastic!”
“There is a replay mechanism, so it seems to be deterministic.”
“This is a great library and Erin deserves your support”
“I’ll certainly be taking a look at this”
“so how does it compare?”
“i love that we went from bullet being the only real option for open source 3D physics to jolt, rapier, avian, nvidia physx and now box3d.”