12.70. XR_HTC_vive_wrist_tracker_interaction

Name String

XR_HTC_vive_wrist_tracker_interaction

Revision

Overview

This extension provides an XrPath for getting device input from a VIVE wrist tracker to enable its interactions. VIVE wrist tracker is a tracked device mainly worn on user¡¦s wrist for pose tracking. Besides this use case, user also can tie it to a physical object to track its object pose, e.g. tie on a gun.

VIVE Wrist Tracker input

Interaction profile path:

/interaction_profiles/htc/vive_wrist_tracker

Valid for user paths:

/user/wrist_htc/left
/user/wrist_htc/right

Supported input source

On /user/wrist_htc/left only:
- ¡K/input/menu/click
- ¡K/input/x/click
On /user/wrist_htc/right only:
- ¡K/input/system/click (may not be available for application use)
- ¡K/input/a/click
¡K/input/entity_htc/pose

The entity_htc pose allows the applications to recognize the origin of a tracked input device, especially for the wearable devices which are not held in the user¡¦s hand. The entity_htc pose is defined as follows:

The entity position: The center position of the tracked device.
The entity orientation: Oriented with +Y up, +X to the right, and -Z forward.

VIVE Plugin

After adding the "VIVE Focus3 Wrist Tracker" to "Project Settings > XR Plugin-in Management > OpenXR > Android Tab > Interaction Profiles", you can use the following Input Action Pathes.

Left Hand

{LeftHand}/primaryButton: Left tracker primary button pressed state.
{LeftHand}/menu: Left tracker menu button pressed state.
{LeftHand}/devicePose: Left tracker pose.
{LeftHand}/devicePose/isTracked: Left tracker tracking state.

Right Hand

{RightHand}/primaryButton: Right tracker primary button pressed state.
{RightHand}/menu: Right tracker menu button pressed state.
{RightHand}/devicePose: Right tracker pose.
{RightHand}/devicePose/isTracked: Right tracker tracking state.

Refer to the /Plugin/Input/ActionMap/InputActions.inputActions about the "Input Action Path" usage and the sample /Plugin/Input/OpenXRInput.unity.

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