I found the ground plane is slightly rotated with respect to the physical ground plane after completing calibration using six OptiTrack Prime 17W. When I set the ground plane, I put three trackers on the ground plane in the triangle shape. Although I change size of the triangle and put trackers in different shape (e.g. straight line), the ground plane is still rotated w.r.t. the physical ground plane.
Therefore, the recorded data is not straight line and drifted although trackers moves straight forward in the physical ground plane. I want to have ground plane which is identical w.r.t the physical plane.
Any comments would be appreciated.
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