[cncool]

The SpriteKit physics engine uses Box2D internally. Here is a dump of the SpriteKit framework:

https://ghostbin.com/paste/tm4ko

b2* shows up in there many times.

edit: slow pony

[interpol_p]

Thanks for that, that's really interesting. It behaved differently in my experiments so I assumed it wasn't the same — but it must just be a different configuration.