XR Interaction Toolkit

The XR Interaction Toolkit package is a high-level, component-based, interaction system for creating VR and AR experiences. It provides a framework that makes 3D and UI interactions available from Unity input events. The core of this system is a set of base Interactor and Interactable components, and an Interaction Manager that ties these two types of components together. It also contains components that you can use for locomotion and drawing visuals.

XR Interaction Toolkit contains a set of components that support the following Interaction tasks:

• Cross-platform XR controller input: Meta Quest (Oculus), OpenXR, Windows Mixed Reality, and more.
• Basic object hover, select and grab
• Haptic feedback through XR controllers
• Visual feedback (tint/line rendering) to indicate possible and active interactions
• Basic canvas UI interaction with XR controllers
• Utility for interacting with XR Origin, a VR camera rig for handling stationary and room-scale VR experiences

To use the AR interaction components in the package, you must have the AR Foundation package in your Project. The AR functionality provided by the XR Interaction Toolkit includes:

• AR gesture system to map screen touches to gesture events
• AR interactable can place virtual objects in the real world
• AR gesture interactor and interactables to translate gestures such as place, select, translate, rotate, and scale into object manipulation
• AR annotations to inform users about AR objects placed in the real world

Technical details

Requirements

This version of the XR Interaction Toolkit is compatible with the following versions of the Unity Editor:

• 2020.3 and later

Dependencies

The XR Interaction Toolkit package has several dependencies which are automatically added to your project when installing:

• Input System (com.unity.inputsystem)
• Unity UI (com.unity.ugui)
• XR Core Utilities (com.unity.xr.core-utils)
• XR Legacy Input Helpers (com.unity.xr.legacyinputhelpers)
• Built-in modules
  • Audio
  • IMGUI
  • Physics

Optional dependencies

To enable additional AR interaction components included in the package, AR Foundation (com.unity.xr.arfoundation) must be added to your project using Package Manager.

To enable additional properties in some behaviors, the Animation module must be added to your project using Package Manager.

Known limitations

• When using multiple interactor support on XR Grab Interactables and transferring between a socket interactor and direct/ray interactor, if Attach Ease In Time is set to 0, there can be a 1 frame visual skip that can occur. To mitigate this visual disturbance, set the Attach Ease In Time to a minimum of 0.15. You can also resolve this issue by loading the scene containing the socket interactors after the controller interactors are registered with the XR Interaction Manager if your project does not enable or disable the direct/ray interactors at runtime in order to make the sockets registered last.

• Mouse inputs don't interact with world space UIs when an XR Plug-in Provider in Edit > Project Settings > XR Plug-in Management is enabled and running. For more information, please follow the issue tracker. (1400186)

Helpful links

If you have a question after reading the documentation, you can:

• Join our support forum.
• Search the issue tracker for active issues.
• View our public roadmap and submit feature requests.
• Download example projects that demonstrates functionality.

Document revision history

Date	Reason
March 4, 2022	Samples updated and added link to example projects. Matches package version 2.0.1.
February 10, 2022	Documentation split into multiple pages, added known limitations, and updated for transition from pre-release to released version 2.0.0.
November 17, 2021	Documentation updated due to change in Input System package related to Game view focus, interaction interfaces, and multiple selections. Matches package version 2.0.0-pre.4.
March 15, 2021	Documentation updated to reflect change that custom Editor classes are no longer needed to show additional serialized fields. Matches package version 1.0.0-pre.3.
December 14, 2020	Documentation updated to reflect change to when registration with Interaction Manager occurs and for changes to event signatures. Matches package version 1.0.0-pre.2.
October 20, 2020	Documentation updated. Matches package version 0.10.0.
January 10, 2020	Removed private github link.
December 12, 2019	Fixed image linking.
December 4, 2019	Document revised with documentation team feedback.
October 3, 2019	Document update to reflect package naming for release.
September 4, 2019	Document revised with updated images and component names.
August 13, 2019	Document edits.
July 31, 2019	Finalized Locomotion documentation.
July 18, 2019	Document revised with Locomotion documentation.
July 10, 2019	Document revised with AR interaction documentation.
June 6, 2019	Document revised with updated UI module documentation.
May 30, 2018	Document revised with commands and updated component names.
May 1, 2018	Document created.