@Erin Catto
Game physics and animation. Creator of Box2D. Working on The Legend of California.
Relays (1)
- wss://relay.ditto.pub – read & write
Recent Notes
Large world support is coming to Box2D v3.2. Uses doubles for body positions but all math is done in relative coordinates using single precision. Around 3% performance loss.
https://www.youtube.com/watch?v=RwQrQafZU6Y
https://www.youtube.com/watch?v=RwQrQafZU6Y
nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqz9myc59yadhemq6s3mpsugrdzzfqr55c582tedltugukfwhgtn5se7valu nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqykddq7nmfd8cd0hupl8fnsmmuhtg55z...
@nprofile1q... @nprofile1q... @nprofile1q... I've had scenarios where the linked lists got really big and the infrequent traversal became a bottleneck. Converting to dynamic arrays improves performance but leads to more allocations.
1
Mass properties can be tricky to get right. This is a test of capsule mass properties. The outer box is an upper bound. The approximate capsule hull is a lower bound. It should converge to the capsule mass with refinement.
I am begging companies to test out their interview questions, especially the coding tests, on their own senior people as calibration, before using them as a gauge for hiring new folks. An awful lot of...
@nprofile1q... What if some senior people cannot answer some basic questions? Awkward.
@nprofile1q... The FBX SDK using globals is a travesty. I'm really surprised Epic and Unity didn't get Autodesk to fix this. Bulk reimporting FBX files shouldn't be restricted to a single thread!
Box2D version 3.1 is released!
Blog post: https://box2d.org/posts/2025/04/box2d-3.1/
Release notes: https://github.com/erincatto/box2d/releases/tag/v3.1.0
Documentation: https://box2d.org/documentation/
Blog post: https://box2d.org/posts/2025/04/box2d-3.1/
Release notes: https://github.com/erincatto/box2d/releases/tag/v3.1.0
Documentation: https://box2d.org/documentation/