C Specification

The XrViewStateFlags specifies the validity and quality of the corresponding XrView array returned by xrLocateViews.

Flags include:

// Flag bits for XrViewStateFlags
static const XrViewStateFlags XR_VIEW_STATE_ORIENTATION_VALID_BIT = 0x00000001;
static const XrViewStateFlags XR_VIEW_STATE_POSITION_VALID_BIT = 0x00000002;
static const XrViewStateFlags XR_VIEW_STATE_ORIENTATION_TRACKED_BIT = 0x00000004;
static const XrViewStateFlags XR_VIEW_STATE_POSITION_TRACKED_BIT = 0x00000008;

Description

Flag Descriptions
  • XR_VIEW_STATE_ORIENTATION_VALID_BIT indicates whether all XrView orientations contain valid data. Applications must not read any of the XrView pose orientation fields if this flag is unset. XR_VIEW_STATE_ORIENTATION_TRACKED_BIT should generally remain set when this bit is set for views on a tracked headset or handheld device.

  • XR_VIEW_STATE_POSITION_VALID_BIT indicates whether all XrView positions contain valid data. When a view loses tracking, runtimes should continue to provide valid but untracked view position values that are inferred or last-known, so long as it’s still meaningful for the application to render content using that position, clearing XR_VIEW_STATE_POSITION_TRACKED_BIT until tracking is recovered. Applications must not read any of the XrView pose position fields if this flag is unset.

  • XR_VIEW_STATE_ORIENTATION_TRACKED_BIT indicates whether all XrView orientations represent an actively tracked orientation. This bit should generally remain set when XR_VIEW_STATE_ORIENTATION_VALID_BIT is set for views on a tracked headset or handheld device.

  • XR_VIEW_STATE_POSITION_TRACKED_BIT indicates whether all XrView positions represent an actively tracked position. When a view loses tracking, runtimes should continue to provide valid but untracked view position values that are inferred or last-known, e.g. based on neck model updates, inertial dead reckoning, or a last-known position, so long as it’s still meaningful for the application to render content using that position.

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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