Erin Catto
@erincatto.bsky.social
I created Box2D. I enjoy all kinds of programming, but specialize in physics and animation. I work in Unreal for my day job (like everyone else). C/C++ and whatever Claude spits out for me. https://box2d.org/
When your graphics programmer tells you to stop simulating off-screen cloth, show them this video.
October 13, 2025 at 9:19 PM
When your graphics programmer tells you to stop simulating off-screen cloth, show them this video.
Conventional wisdom is that you need a complex and expensive direct solver to handle high mass ratios and long chains.
Box2D has an iterative SoftStep solver that uses sub-stepping and soft constraints to handle high mass ratios and long chains.
Box2D has an iterative SoftStep solver that uses sub-stepping and soft constraints to handle high mass ratios and long chains.
April 6, 2025 at 5:46 PM
Conventional wisdom is that you need a complex and expensive direct solver to handle high mass ratios and long chains.
Box2D has an iterative SoftStep solver that uses sub-stepping and soft constraints to handle high mass ratios and long chains.
Box2D has an iterative SoftStep solver that uses sub-stepping and soft constraints to handle high mass ratios and long chains.