Degrees of freedom: Difference between revisions
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'''Degrees of freedom''' or '''DOF''' is the ways an object can move within a space. There are a total of 6 degrees of freedom in a 3 dimensional space. The 6 DOF can be divided into 2 categories, rotational movements and translational movements. Each category has 3 DOF. [[Oculus Rift]] and [[SteamVR]] [[HMD]]s all have 6 DOF. | '''Degrees of freedom''' or '''DOF''' is the ways an object can move within a space. There are a total of 6 degrees of freedom in a 3 dimensional space. The 6 DOF can be divided into 2 categories, rotational movements and translational movements. Each category has 3 DOF. [[Oculus Rift]] and [[SteamVR]] [[HMD]]s all have 6 DOF. | ||
==Rotational Movements== | ==Rotational Movements== | ||
The 3 rotational movements are pitch, yaw, and roll. These movements are tracked by most [[HMD]]s' on-board sensors. As your head | The 3 rotational movements are pitch, yaw, and roll. These movements are tracked by most [[HMD]]s' on-board sensors. As you tilt and turn your head, the HMD senses the movements and alters its display accordingly. | ||
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. | ||