@erincatto.bsky.social
I created Box2D. I enjoy all kinds of programming, but specialize in physics and animation. Working on The Legend of California.
@erincatto.bsky.socialI use the inner sphere to know when movement is slow enough that continuous collision can be skipped. For conservative advancement I've used the outer sphere to put a bound on the movement from rotation.
@erincatto.bsky.socialNew blog post on speeding up the separating axis test (SAT) using inscribed spheres: box2d.org/posts/2026/0...
@erincatto.bsky.socialI’m happy to announce the release of a new open source 3D physics engine called Box3D. I’ve been working on this project for a few years now, but it represents over 20 years of experience writing physics engines for games. Read more here: box2d.org/posts/2026/0...