dof：degree of freedom
3dof: There are 3 degrees of freedom of rotation angle
6dof: In addition to the 3 rotation angles, plus 3 position-related degrees of freedom such as up and down, front and back, left and right.
When we say 3dof VR glasses or VR equipment, it means that the VR equipment can detect the free rotation of the head in different directions, but cannot detect the spatial displacement of the head in front, back, left, and right. The 6dof VR device, in addition to detecting the change of the field of view angle caused by the rotation of the head, can also detect the change of the up, down, front, back, left, and right displacement caused by the body movement.
It is easy to understand with a more vivid picture explanation:
3DOF VR devices can generally be used to watch VR movies, but to achieve interaction with the scene when playing games, you need a VR device that supports 6DOF, so that we can experience crossing obstacles, avoiding bullets and monsters, And super real feelings such as jumping off a building, climbing a mountain, and skiing.
