Input Bindings
Input Binding Paths
This guide explains how to access HMD data from OpenXR in Unity using the Input System's built-in HMD bindings.
HMD device layout
The OpenXR Plugin provides a device layout for the HMD, which inherits from the <OpenXRHmd> layout. This layout has four elements: centerEye, device, leftEye, and rightEye. Each element has four controls: position, rotation, velocity, and angularVelocity. These controls are exposed in the Unity Input System through the following bindings:
| Name | Path | Type | ControlType | InitialStateCheck |
|---|---|---|---|---|
| Position | <OpenXRHmd>/devicePosition <OpenXRHmd>/centerEyePosition | Value | Vector3 | True |
| Rotation | <OpenXRHmd>/deviceRotation | Value | Quaternion | True |
| Status | <OpenXRHmd>/trackingState | Value | Integer | True |
Tracked Pose Driver
The Tracked Pose Driver allows objects to mirror the positional and rotation input of any Input Device. To track the HMD position :
- Add a Tracked Pose Driver (Input System) component to the target transform.
- Set the Tracking Type to Rotation And Position.
- For the both the Position and Rotation input set the Input Action binding path to XR HMD.
