Architecture

Unity OpenXR: Meta functions as both an OpenXR Feature Group and an AR Foundation provider plug-in.

OpenXR extensions

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

This package enables support for the following OpenXR extensions in your project:

Extension	Usage	Description
XR_FB_scene_capture	Session	This extension allows an application to request that the system begin capturing information about what is in the environment around the user.
XR_FB_passthrough	Camera	Passthrough is a way to show a user their physical environment in a light-blocking VR headset.
XR_FB_spatial_entity	Planes, Anchors, Meshing, Bounding boxes	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. All Facebook spatial entity and scene extensions are dependent on this one.
XR_FB_scene	Planes, Meshing, Bounding boxes	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.
XR_FB_display_refresh_rate	Display Utilities	On platforms that support dynamically adjusting the display refresh rate, application developers may request a specific display refresh rate in order to improve the overall user experience.
XR_META_spatial_entity_mesh	Meshing	This extension expands on the concept of spatial entities to include a way for a spatial entity to represent a triangle mesh that describes 3D geometry of the spatial entity in a scene.
XR_META_spatial_entity_discovery	Planes, Anchors, Meshing, Bounding boxes	This extension enables finding and loading persisted Spatial Entities which can then be tracked across different sessions and over time by applications.
XR_META_spatial_entity_persistence	Anchors	This extension enables saving and erasing Spatial Entities, allowing them to be retrieved and tracked across different sessions and over time.