Which is the best way to obtain the horizontal (x-z plane) rotation angle of eyes?
For example, for the right eye rightEyeNode.simdTransform = faceAnchor.rightEyeTransform
and then
asin(rightEyeNode.simdTransform.columns.2.x) or rightEyeNode.eulerAngles.y
Did you test both methods ? Do you get the same result (hope so). On which criteria do you want to know which is best ? I would probably prefer sin, to be sure to use the right referential.
The result was slightly different. I'm not sure which is more accurate.
The results were slightly different. I don't know which one is more accurate than the other.
