Degrees of freedom: Difference between revisions
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Rotational Movements are tracked by [[IMU]]s or [[inertial measurement unit]]s consist of [[accelerometer]], [[gyroscope]] and [[magnetometer]]. These IMUs measure the HMD's velocity, orientation, and gravitational forces to infer rotational orientation and movement. The 3 IMUs are often marketed as having "9 DOF". The 9 DOF are calculated by adding up the 3 DOF detected by each IMU. In reality, accelerometer, gyroscope and magnetometer all measure the same 3 DOF: pitch, yaw, and roll. | Rotational Movements are tracked by [[IMU]]s or [[inertial measurement unit]]s consist of [[accelerometer]], [[gyroscope]] and [[magnetometer]]. These IMUs measure the HMD's velocity, orientation, and gravitational forces to infer rotational orientation and movement. The 3 IMUs are often marketed as having "9 DOF". The 9 DOF are calculated by adding up the 3 DOF detected by each IMU. In reality, accelerometer, gyroscope and magnetometer all measure the same 3 DOF: pitch, yaw, and roll. | ||
==Translational | ==Translational movements== | ||
The 3 translational movements are left/right, forward/backward and up/down. These movements are usually tracked by an external camera or other sensors. Few HMDs use on-board sensors to track translational movements. | The 3 translational movements are left/right, forward/backward and up/down. These movements are usually tracked by an external camera or other sensors. Few HMDs use on-board sensors to track translational movements. | ||
The ability to | The ability to track translational movements is required for [[positional tracking]]. (positional tracking is the ability to determine the absolute position of an object in a 3D environment) | ||
[[Category:Terms]] | [[Category:Terms]] | ||