From Sonic Retro
|SCHG: Sonic Jam|
(In alphabetical order; if you are a contributor and have worked on a specific part of the guide, feel free to note that.)
Pieces of the guide not big enough for their own page should be left here.
3D Vectors consist of 3 longwords. The upper word of each long is the integral value of the component; $0001 is 1 unit. The lower word is fractional, out of 65536; $8000 becomes 0.5 units.
An Euler Rotation consists of 3 words. Each word rotates around one axis: X, Y, and Z in order (though the three don't always point how you'd expect). $0000 is 0 degrees of rotation, $8000 is 180 degrees of rotation.
I've yet to confirm if all Euler Rotations have the same handedness.