Direct conversion helpers for quaternion to the scaled axis-angle representation and back without the need to convert them first to the axis-angle format and manually scale (or normalize on the way back). This also avoids having to deal with the special case of an identity representation which is 0,0,0 in the scaled axis-angle format while our convention for axis-angle is 0,1,0 for the axis and 0 for the angle.
Added unit tests that check the conversion round-trips from quaternion -> (scaled) axis-angle -> quaternion as well as comparing the scaled axis-angle representations from the direct helper functions as well as the axis-angle while manually scaling/normalizing.
Signed-off-by: Benjamin Jillich <jillich@amazon.com>
Benjamin Jillich
d20aa935ba