The VRPose interface of the WebVR API represents the state of a VR sensor at a given timestamp (which includes orientation, position, velocity, and acceleration information.)
The angularAcceleration read-only property of the VRPose interface returns the angular acceleration of the VRDisplay at the current VRPose.timestamp, in meters per second per second.
The angularVelocity read-only property of the VRPose interface returns the angular velocity of the VRDisplay at the current VRPose.timestamp, in radians per second.
The linearAcceleration read-only property of the VRPose interface returns the linear acceleration of the VRDisplay at the current VRPose.timestamp, in meters per second per second.
The linearVelocity read-only property of the VRPose interface returns the linear velocity of the VRDisplay at the current VRPose.timestamp, in meters per second.
The orientation read-only property of the VRPositionState interface returns the orientation of the sensor at the current VRPose.timestamp, as a quarternion value.
The timestamp read-only property of the VRPose interface returns the current time stamp of the system — a monotonically increasing value representing the time since the current app was started.