Meta Hand Tracking Aim OpenXR feature

Unity provides support for the Meta Hand Tracking Aim OpenXR extension specified by Khronos. For this extension to work, you must also enable the Hand Tracking Subsystem OpenXR feature.

This extension requires you to install the OpenXR Plugin package. For this extension to work when deployed to a Meta Quest device, the OpenXR Plugin package version must be 1.6.0 or newer.

Enable this OpenXR feature to expose the MetaAimHand input device within the Unity Input System, which is a type of Tracked Input Device.

Available controls

The following table outlines the mapping between the OpenXR paths and Unity's implementation:

Data	Binding Path	Type
Position	<MetaAimHand>/devicePosition (or <TrackedDevice>/devicePosition)	Vector3
Rotation	<MetaAimHand>/deviceRotation (or <TrackedDevice>/deviceRotation)	Quaternion
Is Tracked	<MetaAimHand>/isTracked (or <TrackedDevice>/isTracked)	Boolean
Tracking State	<MetaAimHand>/trackingState (or <TrackedDevice>/trackingState)	Integer (flags enum)
Aim Flags	<MetaAimHand>/aimFlags	Integer (flags enum)
Index Pinch Strength	<MetaAimHand>/pinchStrengthIndex	Float 0 to 1
Middle Pinch Strength	<MetaAimHand>/pinchStrengthMiddle	Float 0 to 1
Ring Pinch Strength	<MetaAimHand>/pinchStrengthRing	Float 0 to 1
Little Pinch Strength	<MetaAimHand>/pinchStrengthLittle	Float 0 to 1
Is Index Pressed	<MetaAimHand>/indexPressed	Boolean
Is Middle Pressed	<MetaAimHand>/middlePressed	Boolean
Is Ring Pressed	<MetaAimHand>/ringPressed	Boolean
Is Little Pressed	<MetaAimHand>/littlePressed	Boolean

To specify a particular hand, you can add {LeftHand} or {RightHand} after the <MetaAimHand> in the binding, such as <MetaAimHand>{LeftHand}/devicePosition.

For more information about the Meta Hand Tracking Aim extension, see the OpenXR Specification: XR_FB_hand_tracking_aim.