C Specification

The xrSetMarkerTrackingTimeoutVARJO function is defined as:

// Provided by XR_VARJO_marker_tracking
XrResult xrSetMarkerTrackingTimeoutVARJO(
    XrSession                                   session,
    uint64_t                                    markerId,
    XrDuration                                  timeout);

Parameters

Parameter Descriptions
  • session is an XrSession handle previously created with xrCreateSession.

  • markerId is the unique identifier of the marker for which the timeout will be updated.

  • timeout is the desired lifetime duration for a specified marker.

Description

The xrSetMarkerTrackingTimeoutVARJO function sets a desired lifetime duration for a specified marker. The default value is XR_NO_DURATION. Negative value will be clamped to XR_NO_DURATION. It defines the time period during which the runtime must keep returning poses of previously tracked markers. The tracking may be lost if the marker went outside of the trackable field of view. In this case the runtime still will try to predict marker’s pose for the timeout period. The runtime must return XR_ERROR_MARKER_ID_INVALID_VARJO if the supplied markerId is invalid.

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_RUNTIME_FAILURE

  • XR_ERROR_HANDLE_INVALID

  • XR_ERROR_INSTANCE_LOST

  • XR_ERROR_SESSION_LOST

  • XR_ERROR_MARKER_ID_INVALID_VARJO

  • XR_ERROR_FEATURE_UNSUPPORTED

See Also

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.

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