koobas.hobune.stream
Determine degrees rotated around an arbitrary axis
Setup:
The thick orange line is my arbitrary axis.
The purple dot is the point which needs the angle determined.
Question: Given the point Purple, how far is it rotated around the arbitrary axis Orange? How do I calculate how far purple is rotated around orange?
I know there is the function Quaternion.AngleAxis() which allows you to rotate something around an arbitrary axis by a given angle. My situation needs to reverse engineer that, to figure out what the rotation is.
I imagine I'll have to translate everything towards the origin, then rotate everything so that the axis lies on either X, Y or Z, then calculate the rotation of Purple around that axis, but I'm wondering if Unity has a built in helper that does this computation for me, or if I'll have to slog it out and manually do the transforms and rotations.
Anyone handled this situation before?
