Answer by FrojoS

I have a really stupid question: Where is the documentation for the Unity3D coordinate system convention? Ideally, I would like to have an official document, that I can cite in a technical report, which contains: - coordinate system: left handed - gravity convention: in which direction is gravity pointing? Seems like its negative y. - Euler Angles: which order of rotation (there are 64 different possibilities!). Seems like its Kardan, with z -> y -> x, all counter clockwise. - Quaternions: Is w rotating clock wise or counterclockwise around the xyz vector? - Units: SI? Seems like the unit translation is ment to be 1 meter.