The short version
An open-source 3D physics engine from the Box2D author.
From the HackerLinks archive
Box3D
An open-source 3D physics engine from the Box2D author.
At a glance:
First seen:2026-07-01
Last seen:2026-07-01
Times seen:1
Website:github.com
Why it caught our attention
HN immediately treated it as a serious sibling to Box2D.
Where it surfaced on Hacker News
2026-07-01
Editorial paraphrase
Replies linked the GitHub repo and talked about Erin Catto, Angry Birds physics, and the library’s pedigree.
Original threadBox3D, an open source 3D physics engine