Oh yes, it's for sure an experimental thing, and probably patented out the wazoo. My point is just that it's physically possible, as I don't think that is well

Oh yes, it's for sure an experimental thing, and probably patented out the wazoo. My point is just that it's physically possible, as I don't think that is well known. (Note also that doing this outside of a mocap arena would probably require a pretty high-quality IMU since you need very accurate yaw and you're constantly integrating your gyro to get it, with only the magnetometer and maybe the camera providing any kind of absolute reference.)