3DoF vs 6DoF in VR:
In VR, DoF is a common term that stands for Degree of Freedom. The number before it stands for how many different axes are being tracked. It is significant when deciding which type of VR headset to buy depending on it’s DoF tracking.
For instance, when purchasing a VR headset for the purpose of watching 360 videos, then a 3DoF VR headset is enough. This is because you cannot change the distance to the objects in the room. In 3DoF headsets, you can only move in 3D environments with joysticks but not your physical motion.
On the contrary, a 6DoF headset is necessary if you want to use it in 3D environments. With 6DoF, your physical movement is also tracked by the gyroscope to allow virtual movement.
There are three main axes which are known as the translational and three secondary axes which are known as rotational.
When a VR device has 3DoF it will either be rotational or translational. But, not both. On the other hand, a 6Dof experience allows for both. Therefore, if you want to track both the head and physical body movements, a 6DoF is definitely the best option for you to buy.
There are three types of movements in rotational axes. They can be tracked by the movement of the head. These movements are known as rolling, pitching and yawing.
Rolling is where the head pivots side to side.Try this by looking straight-forward. Then slowly tilt your head, where your right ear approaches your right shoulder. Now repeat the same movement with your left ear approaching your left shoulder. This movement along the rotational X-axis is known as rolling.
Yawing is where the head swivels along a horizontal axis. Try this by looking straight-forward. Then slowly move your head to face your right, where your chin approaches your right shoulder. Now repeat the same movement in the opposite direction to your left. This movement along the rotational Y-axis is known as yawing.
Pitching is where the head tilts along a vertical axis. Try this by looking straight-forward. Then slowly move your head along the vertical axis where your chin approaches your neck. Now repeat the same movement with your chin moving away from your neck. This movement along the rotational Z-axis is known as pitching.
There are three types of movements in transitional axes. They can be tracked by the movement of the body. These movements are known as: elevating, strafing and surging.
Strafing is when you move sideways in a straight-line. You can try this by moving in a straight-line to the left then moving to the right. This movement along the transitional x-axis is known as strafing.
Surging is when you move front and back in a straight line. This can be done by taking steps forward or backwards in a straight-line. This movement along the transitional y-axis is known as surging.
Elevating is when you move your body vertically along the z-axis. This can be done by jumping up and down or crouching and then getting back up. This movement along the transitional z-axis is known as elevating.
Therefore, the difference between 3DoF vs 6DoF is that in 6DoF you can track both rotational and transitional axes. Making it a far better choice compared to the 3DoF.
You can do a lot more seamlessly without the hassle of physically moving around using a joystick.
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