Architecture

The Meta OpenXR Feature package functions as both an OpenXR Feature and an AR Foundation provider plug-in, and primarily contains subsystem providers that are implemented via Meta's OpenXR extensions.

Meta OpenXR extensions

Meta's OpenXR extensions can be found in the Khronos Group OpenXR Specification.

This package enables the following OpenXR extension strings in your project:

Extension String	Purpose	Description
XR_FB_passthrough	Passthrough	Passthrough is a way to show a user their physical environment in a light-blocking VR headset.
XR_FB_spatial_entity	Plane detection, Anchors	This extension enables applications to use spatial entities to specify world-locked frames of reference. It enables applications to persist the real world location of content over time and contains definitions for the Entity-Component System. All Facebook spatial entity and scene extensions are dependent on this one.
XR_FB_spatial_entity_query	Plane detection	This extension enables an application to discover persistent spatial entities in the area and restore them. Using the query system, the application can load persistent spatial entities from storage.
XR_FB_spatial_entity_storage	Plane detection	This extension enables spatial entities to be stored and persisted across sessions.
XR_FB_scene	Plane detection	This extension expands on the concept of spatial entities to include a way for a spatial entity to represent rooms, objects, or other boundaries in a scene.