public void Initialize()
{
if (FocusSizeFromCenter == null)
{
Reset();
}
#if UNITY_EDITOR || DEVELOPMENT_BUILD
VISFixationEnds.Add("discard", new List <Fixation>());
VISFixationEnds.Add("out of range", new List <Fixation>());
VISFixationEnds.Add("microsleep", new List <Fixation>());
VISFixationEnds.Add("off transform", new List <Fixation>());
var viewer = FindObjectOfType <FixationVisualizer>();
if (viewer != null)
{
viewer.SetTarget(this);
}
var saccade = FindObjectOfType <SaccadeDrawer>();
if (saccade != null)
{
saccade.SetTarget(this);
}
//gameObject.AddComponent<FixationVisualizer>().SetTarget(this);
if (DebugMaterial != null)
{
lastEyeTrackingPointer = GameObject.CreatePrimitive(PrimitiveType.Sphere);
lastEyeTrackingPointer.transform.localScale = Vector3.one * 0.2f;
lastEyeTrackingPointer.GetComponent <MeshRenderer>().material = DebugMaterial;
Destroy(lastEyeTrackingPointer.GetComponent <SphereCollider>());
}
#endif
ActiveFixation = new Fixation();
for (int i = 0; i < CachedEyeCaptures; i++)
{
EyeCaptures[i] = new EyeCapture()
{
Discard = true
};
}
#if CVR_FOVE
fovebase = FindObjectOfType <FoveInterfaceBase>();
#elif CVR_TOBIIVR
if (EyeTracker == null)
{
EyeTracker = FindObjectOfType <Tobii.Research.Unity.VREyeTracker>();
}
#elif CVR_AH
ah_calibrator = Calibrator.Instance;
eyetracker = EyeTracker.Instance;
#endif
}
/// <summary>
/// for a smooth pursuit fixation, is transform
/// </summary>
/// <param name="capture"></param>
/// <returns></returns>
bool IsGazeOffTransform(EyeCapture capture)
{
if (!IsFixating)
{
return(true);
}
if (capture.HitDynamicTransform != ActiveFixation.LocalTransform)
{
return(true);
}
return(false);
}
//called just before new eyecapture is recorded. this has been around 1 second, so 'safe' to actually record
public void AddEyeCapture(EyeCapture eyeCapture)
{
bool validEyeCapture = true;
if (eyeCapture.Discard)
{
validEyeCapture = false;
}
else
{
LastNonDiscardedTime = eyeCapture.Time;
}
if (eyeCapture.EyesClosed)
{
validEyeCapture = false;
}
else
{
LastEyesOpen = eyeCapture.Time;
}
if (eyeCapture.OutOfRange)
{
validEyeCapture = false;
}
else
{
LastInRange = eyeCapture.Time;
}
if (eyeCapture.OffTransform)
{
validEyeCapture = false;
}
else
{
LastOnTransform = eyeCapture.Time;
}
//basically just add duration
if (validEyeCapture)
{
LastUpdated = eyeCapture.Time;
DurationMs = StartMs - LastUpdated;
}
}
/// <summary>
/// returns true if gaze is NOT within active fixation
/// updates average fixation position
/// removes old smooth pursuit eye captures points (DynamicRollingAverageMS)
/// </summary>
/// <param name="capture"></param>
/// <returns></returns>
bool IsGazeOutOfRange(EyeCapture capture)
{
if (!IsFixating)
{
return(true);
}
if (ActiveFixation.IsLocal)
{
if (ActiveFixation.LocalTransform == null)
{
return(true);
}
if (capture.SkipPositionForFixationAverage || capture.OffTransform)
{
var _fixationWorldPosition = ActiveFixation.LocalTransform.TransformPoint(ActiveFixation.LocalPosition);
var _fixationDirection = (_fixationWorldPosition - capture.HmdPosition).normalized;
var _eyeCaptureWorldPos = ActiveFixation.LocalTransform.TransformPoint(capture.LocalPosition);
var _eyeCaptureDirection = (_eyeCaptureWorldPos - capture.HmdPosition).normalized;
var _eyeCaptureScreenPos = GameplayReferences.HMDCameraComponent.WorldToViewportPoint(_eyeCaptureWorldPos);
var _screendist = Vector2.Distance(_eyeCaptureScreenPos, Vector3.one * 0.5f);
var _rescale = FocusSizeFromCenter.Evaluate(_screendist);
var _adjusteddotangle = Mathf.Cos(MaxFixationAngle * _rescale * DynamicFixationSizeMultiplier * Mathf.Deg2Rad);
if (Vector3.Dot(_eyeCaptureDirection, _fixationDirection) < _adjusteddotangle)
{
return(true);
}
return(false);
}
else
{
//try to move fixation to include this capture too
Vector3 averagelocalpos = Vector3.zero;
foreach (var v in CachedEyeCapturePositions)
{
averagelocalpos += v;
}
averagelocalpos += capture.LocalPosition;
averagelocalpos /= (CachedEyeCapturePositions.Count + 1);
var _fixationWorldPosition = ActiveFixation.LocalTransform.TransformPoint(averagelocalpos);
var _fixationDirection = (_fixationWorldPosition - capture.HmdPosition).normalized;
var _eyeCaptureWorldPos = ActiveFixation.LocalTransform.TransformPoint(capture.LocalPosition);
var _eyeCaptureDirection = (_eyeCaptureWorldPos - capture.HmdPosition).normalized;
var _eyeCaptureScreenPos = GameplayReferences.HMDCameraComponent.WorldToViewportPoint(_eyeCaptureWorldPos);
var _screendist = Vector2.Distance(_eyeCaptureScreenPos, Vector3.one * 0.5f);
var _rescale = FocusSizeFromCenter.Evaluate(_screendist);
var _adjusteddotangle = Mathf.Cos(MaxFixationAngle * _rescale * DynamicFixationSizeMultiplier * Mathf.Deg2Rad);
if (Vector3.Dot(_eyeCaptureDirection, _fixationDirection) < _adjusteddotangle)
{
return(true);
}
float distance = Vector3.Magnitude(_fixationWorldPosition - capture.HmdPosition);
float currentRadius = Mathf.Atan(MaxFixationAngle * Mathf.Deg2Rad) * distance;
ActiveFixation.MaxRadius = Mathf.Max(ActiveFixation.MaxRadius, currentRadius);
CachedEyeCapturePositions.Add(capture.LocalPosition);
ActiveFixation.LocalPosition = averagelocalpos;
return(false);
}
}
else
{
var screenpos = GameplayReferences.HMDCameraComponent.WorldToViewportPoint(capture.WorldPosition);
var screendist = Vector2.Distance(screenpos, Vector3.one * 0.5f);
var rescale = FocusSizeFromCenter.Evaluate(screendist);
var adjusteddotangle = Mathf.Cos(MaxFixationAngle * rescale * Mathf.Deg2Rad);
if (capture.SkipPositionForFixationAverage) //eye capture is invalid (probably from looking at skybox)
{
Vector3 lookDir = (capture.WorldPosition - capture.HmdPosition).normalized;
Vector3 fixationDir = (ActiveFixation.WorldPosition - capture.HmdPosition).normalized;
if (Vector3.Dot(lookDir, fixationDir) < adjusteddotangle)
{
return(true);
}
else
{
//looking at skybox. will not update fixation radius
}
}
else
{
Vector3 averageworldpos = Vector3.zero;
foreach (var v in CachedEyeCapturePositions)
{
averageworldpos += v;
}
averageworldpos += capture.WorldPosition;
averageworldpos /= (CachedEyeCapturePositions.Count + 1);
Vector3 lookDir = (capture.WorldPosition - capture.HmdPosition).normalized;
Vector3 fixationDir = (averageworldpos - capture.HmdPosition).normalized;
if (Vector3.Dot(lookDir, fixationDir) < adjusteddotangle)
{
return(true);
}
float distance = Vector3.Magnitude(ActiveFixation.WorldPosition - capture.HmdPosition);
float currentRadius = Mathf.Atan(MaxFixationAngle * Mathf.Deg2Rad) * distance;
ActiveFixation.MaxRadius = Mathf.Max(ActiveFixation.MaxRadius, currentRadius);
CachedEyeCapturePositions.Add(capture.WorldPosition);
ActiveFixation.WorldPosition = averageworldpos;
}
}
return(false);
}
