C Specification

The XrFaceTrackingStateANDROID enumeration identifies the different states of the face tracker.

// Provided by XR_ANDROID_face_tracking
typedef enum XrFaceTrackingStateANDROID {
    XR_FACE_TRACKING_STATE_PAUSED_ANDROID = 0,
    XR_FACE_TRACKING_STATE_STOPPED_ANDROID = 1,
    XR_FACE_TRACKING_STATE_TRACKING_ANDROID = 2,
    XR_FACE_TRACKING_STATE_MAX_ENUM_ANDROID = 0x7FFFFFFF
} XrFaceTrackingStateANDROID;

Description

The enumerants have the following meanings:

Enum Description

XR_FACE_TRACKING_STATE_PAUSED_ANDROID

Indicates that face tracking is paused but may be resumed in the future.

XR_FACE_TRACKING_STATE_STOPPED_ANDROID

Tracking has stopped but the client still has an active face tracker.

XR_FACE_TRACKING_STATE_TRACKING_ANDROID

The face is currently tracked and its pose is current.

See Also

XR_ANDROID_face_tracking, XrFaceStateANDROID, xrGetFaceStateANDROID

Document Notes

For more information, see the OpenXR Specification

This page is extracted from the OpenXR Specification. Fixes and changes should be made to the Specification, not directly.

Copyright

Copyright 2014-2025 The Khronos Group Inc.

This work is licensed under a Creative Commons Attribution 4.0 International License.