Degrees of freedom: Difference between revisions
→Translational Movements: Improve section overall , decapitalize term, etc. |
→Rotational Movements: Improve section and remove blatant falsehood |
||
| Line 1: | Line 1: | ||
'''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. The original [[Oculus Rift DK1]] only had 3DOF. Oculus Rift headsets DK2 and later, and [[SteamVR]] [[HMD]]s all have 6 DOF. Both [[rotational tracking|orientation tracking]] (rotation) and [[positional tracking]] (translation) are required to have a truly [[immersion|immersive]] [[VR]] experience. | '''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. The original [[Oculus Rift DK1]] only had 3DOF. Oculus Rift headsets DK2 and later, and [[SteamVR]] [[HMD]]s all have 6 DOF. Both [[rotational tracking|orientation tracking]] (rotation) and [[positional tracking]] (translation) are required to have a truly [[immersion|immersive]] [[VR]] experience. | ||
==Rotational | ==Rotational movements== | ||
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. | 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 | Rotational movements are tracked by [[IMU]]s (inertial measurement units), which consist of an [[accelerometer]], [[gyroscope]], and optionally a [[magnetometer]]. These IMUs measure the HMD's velocity, orientation, and gravitational forces to infer rotational orientation and movement. An IMU that has a magnetometer is often marketed as having "9 DOF". The 9 DOF are calculated by adding up the 3 DOF detected by each subsensor. | ||
==Translational movements== | ==Translational movements== | ||