[rademacher]

Wow. I'm surprised to see this on here. I used to work Johnson, he's is a super nice guy and always made time to have long conversations with me about optimization.

I believe this algorithm is widely used in the video game industry?

[tbabb]

Video games and anywhere you need a rigid body collision simulation. So TV & film visual effects is another common use.

[sgillen]

Also researchers who need fast approximate physical dynamics. For example the Mujoco simulator or Drake.