Positional tracking

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Revision as of 13:07, 23 January 2025 by Acro (talk | contribs) (Acro moved page Position and rotation tracking to Position and orientation tracking over redirect)
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Position and rotation tracking is the tracking of something's position and rotation in space, such as a headset or a controller.

It is also known as 6DOF tracking, for the 6 degrees of freedom (DOF): horizontal, vertical, depthwise, pitch, roll, and yaw. It is used in an absolute positioning system. It can be done using a number of different hardware technologies, such as electromagnetic tracking or camera-based tracking.

Methods of camera-based tracking include methods using SLAM or VIO.

Position can be represented in a computer system using a 3D vector. Rotation can be represented using a quaternion.

PnO tracking is related to rotation tracking, which uses 3DOF of space.

Methods

Magnetic tracking

240Hz is generally sufficient if using magnetic tracking with no filtering.

History

3D tracking has been used for motion capture for 3D animated movies.

The 3DOF regime of cheap tracking was embraced by Oculus VR with the original Oculus Rift. The CV1 of the Oculus Rift used (and the DK2) constellation tracking, which is a complex method of 6DOF tracking added on to a robust 3DOF system.

References