XR Face Subsystem
The face subsystem detects and tracks human faces in the environment.
The face subsystem is a type of tracking subsystem, and XRFace
is its trackable.
Face Mesh
In addition to a pose, the face subsystem can supply a mesh representing each tracked face. Vertices, indices, normals, and texture coordinates are all optional. Check the XRFaceSubsystemDescriptor
to determine runtime capabilities.