Hand Interaction

XR_EXT_hand_interaction & XR_HTC_hand_interaction allows developers to create an application with hand interaction.

※1 PC Streaming does not support HTC hand interaction.

※2 Focus 3 does not support EXT hand interaction. Please enable Use HTC Hand Interaction in Project Settings.

Edit > Plugins > Search for OpenXR and ViveOpenXR, and make sure they are enabled.
Note that the " SteamVR " and " OculusVR " plugin must be disabled for OpenXR to work.
Restart the engine for the changes to take effect.

Make sure ViveOpenXR is enabled.
Select Edit > Project Settings > Plugins > Vive OpenXR > Enable Hand Interaction under Hand Interaction to enable OpenXR Hand Interaction extension.
Default is XR_EXT_hand_interaction . Enable Use HTC Hand Interaction if you wish to use XR_HTC_hand_interaction .
Restart the engine to apply new settings after clicking Enable Hand Interaction.

Use Motion Controller Component and set Motion Source to get the tracking pose.

Motion Source	EXT Hand Interaction (Default)	HTC Hand Interaction
Left/Right PinchInteraction	V	X
Left/Right AimInteraction	V	V
Left/Right GripInteraction	V	V
Left/Right PokeInteraction	V	X

Enhanced Input Key	EXT Hand Interaction (Default)	HTC Hand Interaction
Hand Interaction (L/R) Aim Value	V	X
Hand Interaction (L/R) Aim Ready	V	X
Hand Interaction (L/R) Pinch Value	V	V
Hand Interaction (L/R) Pinch Ready	V	X
Hand Interaction (L/R) Grasp Value	V	V
Hand Interaction (L/R) Ready Value	V	X

Make sure the OpenXR Hand Interaction extension is enabled, the setting is in Edit > Project Settings > Plugins > Vive OpenXR .
The sample map is under Content > HandInteraction > Map .
Aim the beam at the cubes far from you then pinch to hold them.

Close to cubes and grab them, you can hold them steady.
Start playing the HandInteraction map, you can grab the nearby cubes or aim the beam at cubes to hold and move them. The blue cube will float in the air, and the red ones will drop down when you release them.

Previous Next