[xhrpost]

Interesting. I've recently set aside a ThreeJS project. I'm not a math wiz but even with Three, you still need some idea about matricies, vectors and even quaternions. The way you're "supposed" to do collision detection with Three is with raycasting, so more fun with vectors and matricies. I thought I had scaled down enough other things for prototyping but perhaps there was more room than what I thought.

[daredevildave]

You might want to take a look at our product, PlayCanvas. We've tried to do all the maths for you, so you don't have to. :-)