Vuforia Engine supports both rotational and positional Device Tracking. The Rotational Device Tracker allows for 3 degrees-of-freedom tracking while the Positional Device Tracker allows for 6 degrees-of-freedom tracking.
This article describes the Device Tracker APIs using examples from the native Android and iOS SDKs. For more information on how to use device tracking in Unity see: Configuring Device Tracking in Unity or Using the MixedRealityController in Unity.
Positional Device Tracking
Positional Device Tracking leverages Vuforia Fusion in order to provide positional pose information of the device relative to the world and other objects. Positional Device Tracking allows for features such as Ground Plane and Extended Tracking.
Positional Tracking is enabled by the
Rotational Device Tracking
Rotational Device Tracking requires inertial sensors on the device. It does not depend on the device's camera to report rotational information and, therefore, allows for head tracking and the development of immersive Virtual Reality (VR) experiences. This functionality allows the creation of apps that can track the rotation of a user's head, when using a VR viewer, and also supports handheld device tracking.
Rotational Tracking is enabled by the
RotationalDeviceTracker class, which is a a specialized
Tracker type that reports the rotational pose of a handheld or head mounted device. The Rotational Device Tracker can also be configured with a rotational pivot offset to adjust the pose values to coincide with the center of rotation of a user's head or arm.