C Specification

The xrCreateFacialTrackerHTC function is defined as

// Provided by XR_HTC_facial_tracking
XrResult xrCreateFacialTrackerHTC(
    XrSession                                   session,
    const XrFacialTrackerCreateInfoHTC*         createInfo,
    XrFacialTrackerHTC*                         facialTracker);

Parameters

Parameter Descriptions

Description

An application can create an XrFacialTrackerHTC handle using xrCreateFacialTrackerHTC.

If the system does not support eye tracking or lip tracking, runtime must return XR_ERROR_FEATURE_UNSUPPORTED from xrCreateFacialTrackerHTC according to the corresponding case. In this case, the runtime must return XR_FALSE for XrSystemFacialTrackingPropertiesHTC::supportEyeFacialTracking or XrSystemFacialTrackingPropertiesHTC::supportLipFacialTracking when the function xrGetSystemProperties is called, so that the application may avoid creating a facial tracker.

Valid Usage (Implicit)
Return Codes
On success, this command returns

  • XR_SUCCESS

  • XR_SESSION_LOSS_PENDING

On failure, this command returns

  • XR_ERROR_FUNCTION_UNSUPPORTED

  • XR_ERROR_VALIDATION_FAILURE

  • XR_ERROR_RUNTIME_FAILURE

  • XR_ERROR_HANDLE_INVALID

  • XR_ERROR_INSTANCE_LOST

  • XR_ERROR_SESSION_LOST

  • XR_ERROR_OUT_OF_MEMORY

  • XR_ERROR_LIMIT_REACHED

  • XR_ERROR_FEATURE_UNSUPPORTED

See Also

XR_HTC_facial_tracking, XrFacialTrackerCreateInfoHTC, XrFacialTrackerHTC, XrSession, xrDestroyFacialTrackerHTC

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.