Also shameless self promotion - if you're interested in 4D collision detection (and rendering, and rigid body physics), I've made a semi-tutorial-style repo her

Also shameless self promotion - if you're interested in 4D collision detection (and rendering, and rigid body physics), I've made a semi-tutorial-style repo here: https://github.com/beaumayns/box4d https://github.com/beaumayns/box4d Not nearly as polished as your video, but hopefully someone finds it interesting.