Class GazeProvider

This class provides Gaze as an Input Source so users can interact with objects using their head.

Inheritance
Object
InputSystemGlobalHandlerListener
GazeProvider
Inherited Members
Namespace: Microsoft.MixedReality.Toolkit.Input
Assembly: cs.temp.dll.dll
Syntax
public class GazeProvider : InputSystemGlobalHandlerListener, IMixedRealityEyeGazeProvider, IMixedRealityGazeProvider, IMixedRealityInputHandler, IMixedRealityBaseInputHandler, IEventSystemHandler

Properties

Enabled

Enable or disable the Component attached to the GameObjectReference

Declaration
public bool Enabled { get; set; }
Property Value
Type Description
Boolean

GameObjectReference

Get the GameObject reference for this Gaze Provider.

Declaration
public GameObject GameObjectReference { get; }
Property Value
Type Description
GameObject

GazeCursor

The Gaze Cursor for the provider.

Declaration
public IMixedRealityCursor GazeCursor { get; }
Property Value
Type Description
IMixedRealityCursor

GazeCursorPrefab

The prefab to be instantiated as the gaze cursor.

Declaration
public GameObject GazeCursorPrefab { set; }
Property Value
Type Description
GameObject

GazeDirection

Normal of the gaze.

Declaration
public Vector3 GazeDirection { get; }
Property Value
Type Description
Vector3

GazeInputSource

The Gaze Input Source for the provider.

Declaration
public IMixedRealityInputSource GazeInputSource { get; }
Property Value
Type Description
IMixedRealityInputSource

GazeOrigin

Origin of the gaze.

Declaration
public Vector3 GazeOrigin { get; }
Property Value
Type Description
Vector3

GazePointer

The Gaze Pointer for the provider.

Declaration
public IMixedRealityPointer GazePointer { get; }
Property Value
Type Description
IMixedRealityPointer

GazeTarget

The game object that is currently being gazed at, if any.

Declaration
public GameObject GazeTarget { get; }
Property Value
Type Description
GameObject

HeadMovementDirection

The current head movement direction.

Declaration
public Vector3 HeadMovementDirection { get; }
Property Value
Type Description
Vector3

HeadVelocity

The current head velocity.

Declaration
public Vector3 HeadVelocity { get; }
Property Value
Type Description
Vector3

HitInfo

HitInfo property gives access to information at the object being gazed at, if any.

Declaration
public MixedRealityRaycastHit HitInfo { get; }
Property Value
Type Description
MixedRealityRaycastHit

HitNormal

Normal of the point at which the gaze manager hit an object. If no object is currently being hit, this will return the previous normal.

Declaration
public Vector3 HitNormal { get; }
Property Value
Type Description
Vector3

HitPosition

Position at which the gaze manager hit an object. If no object is currently being hit, this will use the last hit distance.

Declaration
public Vector3 HitPosition { get; }
Property Value
Type Description
Vector3

IsEyeCalibrationValid

Boolean to check whether the user went through the eye tracking calibration. Initially the parameter will return null until it has received valid information from the eye tracking system.

Declaration
public bool? IsEyeCalibrationValid { get; }
Property Value
Type Description
Nullable<Boolean>

IsEyeGazeValid

Whether eye gaze is valid. It may be invalid due to timeout or lack of tracking hardware or permissions.

Declaration
public bool IsEyeGazeValid { get; }
Property Value
Type Description
Boolean

Timestamp

DateTime in UTC when the signal was last updated.

Declaration
public DateTime Timestamp { get; }
Property Value
Type Description
DateTime

UseEyeTracking

If true, eye-based tracking will be used when available.

Declaration
public bool UseEyeTracking { get; set; }
Property Value
Type Description
Boolean
Remarks

The usage of eye-based tracking depends on having the Gaze Input permission set and user approved, along with proper device eye calibration. This will fallback to head-based gaze when eye-based tracking is not available.

Methods

OnDisable()

Declaration
protected override void OnDisable()
Overrides

OnEnable()

Declaration
protected override void OnEnable()
Overrides

OnInputDown(InputEventData)

Declaration
public void OnInputDown(InputEventData eventData)
Parameters
Type Name Description
InputEventData eventData

OnInputUp(InputEventData)

Declaration
public void OnInputUp(InputEventData eventData)
Parameters
Type Name Description
InputEventData eventData

RegisterHandlers()

Declaration
protected override void RegisterHandlers()
Overrides

SetGazeCursor(GameObject)

Set the gaze cursor.

Declaration
public void SetGazeCursor(GameObject cursor)
Parameters
Type Name Description
GameObject cursor

Start()

Declaration
protected override void Start()
Overrides

UnregisterHandlers()

Declaration
protected override void UnregisterHandlers()
Overrides

UpdateEyeGaze(IMixedRealityEyeGazeDataProvider, Ray, DateTime)

Declaration
public void UpdateEyeGaze(IMixedRealityEyeGazeDataProvider provider, Ray eyeRay, DateTime timestamp)
Parameters
Type Name Description
IMixedRealityEyeGazeDataProvider provider
Ray eyeRay
DateTime timestamp

UpdateEyeTrackingStatus(IMixedRealityEyeGazeDataProvider, Boolean)

Declaration
public void UpdateEyeTrackingStatus(IMixedRealityEyeGazeDataProvider provider, bool userIsEyeCalibrated)
Parameters
Type Name Description
IMixedRealityEyeGazeDataProvider provider
Boolean userIsEyeCalibrated

UpdateGazeInfoFromHit(MixedRealityRaycastHit)

Notifies this gaze provider of its new hit details.

Declaration
public void UpdateGazeInfoFromHit(MixedRealityRaycastHit raycastHit)
Parameters
Type Name Description
MixedRealityRaycastHit raycastHit
Remarks

For components that care where the user's looking, we need to separately update the gaze info even if gaze isn't used for focus.

Implements

IEventSystemHandler