Hi BSTRobin, The device is mounted on a testing device that has some external reference marks for having known positions. Besides that, please answer if is it possible that the Game Rotation Vector drifts over time? As far as I know, the main difference between the Rotation Vector and the Game Rotation Vector is that the first one is based on the accel/gyro/mag, while the second one is based on accel/gyro. So the Rotation Vector creates an absolute frame of reference that depends on two absolute magnitudes: gravity and Earth's magnetic field. Which are perpendicular to each other. On the other hand, the Game Rotation Vector is based only on gravity. So, I suppose that for getting the actual position of the device, the Fusion algorithms must basically integrate the acceleration and velocity of the accelerometer and gyroscope respectively. And we know that integration means the accumulation of errors over time. So I just want to be sure if all this is correct, maybe the Fusion library does something else, but I don't think so. Thanks!
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