Quat-based free-look camera

[Stinkfist0]

The current free-look cam is a bit problematic as f.ex. setting an arbitrary orientation for it when doing Locate functionality in Scene Structure window is not possible easily.

[jonnenauha]

I would rather see a solution for the avatar that would let us rotate it on the server freely. Now if you turn it around Y, the X and Z will get bonkers at 180 deg. If you want to set rotation via Placeable::transform you have cache the "last known rotation" into a variable. This makes things like teleporting go out of sync with that thing :P

Very annoying. Much less people use the locate function, but maybe the same techniques can be applied to av server rotation.