/// <summary>
/// Write the Data into the gazeModel
/// </summary>
/// <param name="leftEye"></param>
/// <param name="rightEye"></param>
/// <returns></returns>
public bool WriteEyeSamplesInGazeModel(SDKSampleStruct dataSample)
{
try
{
Vector2 leftEyeGaze = new Vector2((float)dataSample.leftEye.gazeX, (float)dataSample.leftEye.gazeY);
Vector3 leftEyePosition = new Vector3((float)dataSample.leftEye.eyePositionX, (float)dataSample.leftEye.eyePositionY, (float)dataSample.leftEye.eyePositionZ);
Vector2 rightEyeGaze = new Vector2((float)dataSample.rightEye.gazeX, (float)dataSample.rightEye.gazeY);
Vector3 rightEyePosition = new Vector3((float)dataSample.rightEye.eyePositionX, (float)dataSample.rightEye.eyePositionY, (float)dataSample.rightEye.eyePositionZ);
#if UNITY_EDITOR
//Remove the Offset from the Topbar of the Editor
leftEyeGaze.y -= 110f;
rightEyeGaze.y -= 110f;
#endif
EyeSample leftEye = new EyeSample(leftEyeGaze, leftEyePosition, dataSample.leftEye.diam);
EyeSample rightEye = new EyeSample(rightEyeGaze, rightEyePosition, dataSample.rightEye.diam);
this.dataSample = new SampleData(leftEye, rightEye, dataSample.timestamp);
return(true);
}
catch (System.Exception e)
{
UnityEngine.Debug.LogException(e);
return(false);
}
}
public static EyeSample Average(EyeSample first, EyeSample second)
{
return(new EyeSample
(
PointUtils.Average(first.GazePoint2D, second.GazePoint2D),
PointUtils.Average(first.GazePoint3D, second.GazePoint3D),
PointUtils.Average(first.EyePosition3D, second.EyePosition3D),
(first.PupilDiameter + second.PupilDiameter) / 2
));
}
public static IObservable <EyeMovement> ClassifyMovements(this IObservable <EyeVelocity> velocities, double velocityThreshold)
{
return(velocities.Buffer((first, current) => ClassifyMovement(first, velocityThreshold) != ClassifyMovement(current, velocityThreshold))
.Where(b => b.Any())
.Buffer(2, 1)
.Scan <IList <IList <EyeVelocity> >, EyeMovement>(null, (movement, buffers) =>
{
var current = buffers.First();
var last = buffers.LastOrDefault();
var currentFirstSample = current.First();
DateTimeOffset startTimestamp = currentFirstSample.Eye.Timestamp;
if (movement != null)
{
var startTicksDiff = movement.EndTimestamp - movement.Samples.Last().Eye.Timestamp;
startTimestamp = startTimestamp.Subtract(startTicksDiff.Duration());
}
var currentLastSample = current.Last();
DateTimeOffset endTimestamp = currentLastSample.Eye.Timestamp;
if (last != null && last != current)
{
var endTicksDiff = (last.First().Eye.Timestamp - endTimestamp).Duration().Ticks / 2;
endTimestamp = endTimestamp.Add(TimeSpan.FromTicks(endTicksDiff));
}
EyeMovementType movementType = ClassifyMovement(current.First(), velocityThreshold);
EyeSample averageSample = null;
if (movementType == EyeMovementType.Fixation)
{
averageSample = EyeSampleUtils.Average(current.Select(s => s.Eye));
}
return new EyeMovement(movementType, current, averageSample, startTimestamp, endTimestamp);
}));
}
public static double GetVisualAngle(this EyeSample sample, EyeSample from, EyeSample to)
{
return(EyeSampleUtils.GetVisualAngle(sample.EyePosition3D, from.GazePoint3D, to.GazePoint3D));
}
