public async override void SubscribeToFixationDataAsync()
{
// Initialize Fixation data stream.
var fixationDataStream = Host.Streams.CreateFixationDataStream();
fixationDataStream.Next += (o, fixation) =>
{
// Converting Tobii Core FixationData to EyeX GazeData Format
System.Drawing.Rectangle resolution = Screen.PrimaryScreen.Bounds;
GazeData.FixationData fixationData = new GazeData.FixationData
{
Type = nameof(Globals.Constants.GazeDataTypes.FIXATIONS),
Timestamp = (long)fixation.Data.Timestamp,
X_Median = (fixation.Data.X / 3840),
Y_Median = (fixation.Data.Y / 2160),
EventType = Enum.GetName(typeof(FixationDataEventType), fixation.Data.EventType).ToUpper()
};
if (!double.IsNaN(fixation.Data.X))
{
GazeDataProcessor.ProcessFixationData(fixationData);
}
//if (fixationData.EventType == FixationDataEventType.Begin)
//{
// Globals.Globals.fixationCount += 1;
//}
};
}
public async override void SubscribeToGazeDataAsync()
{
var gazePointDataStream = Host.Streams.CreateGazePointDataStream();
gazePointDataStream.GazePoint((x, y, ts) => handleGazeData(x, y, ts));
void handleGazeData(double x, double y, double ts)
{
// Converting Tobii Core GazeData to EyeX GazeData Format
GazeData.GazeData gazeData = new GazeData.GazeData
{
Type = nameof(GazeDataTypes.GAZEPOINTS),
Timestamp = (long)ts,
X_Median = x / 3840,
Y_Median = y / 2160
};
GazeDataProcessor.ProcessGazeData(gazeData);
switch (Settings.Default.FixationAlgorithm)
{
// Use implemented IDT Algorithm
case "IDT":
GazeDataProcessor.ProcessFixationData(null, gazeData);
break;
// Use Tobii Core Default Fixation Alogrithm
default:
SubscribeToFixationDataAsync();
break;
}
}
}
/// <summary>
/// Retrieves Tobii Pro Api Gaze Data and sends it further to the Data Processor
/// </summary>
/// <returns></returns>
public async override void SubscribeToGazeDataAsync()
{
EyeTracker.GazeDataReceived += (sender, gazeDataEventArgs) =>
{
// Converting Tobii Pro GazeData to EyeX GazeData Format
GazeData.GazeData gazeData = new GazeData.GazeData
{
Type = nameof(GazeDataTypes.GAZEPOINTS),
PupilDiameter_Left = gazeDataEventArgs.LeftEye.Pupil.PupilDiameter,
PupilDiameter_Right = gazeDataEventArgs.RightEye.Pupil.PupilDiameter,
Timestamp = gazeDataEventArgs.SystemTimeStamp,
Y_Left = gazeDataEventArgs.LeftEye.GazePoint.PositionOnDisplayArea.Y,
Y_Right = gazeDataEventArgs.RightEye.GazePoint.PositionOnDisplayArea.Y,
X_Left = gazeDataEventArgs.LeftEye.GazePoint.PositionOnDisplayArea.X,
X_Right = gazeDataEventArgs.RightEye.GazePoint.PositionOnDisplayArea.X,
};
// Map 3D Eye Coordinates
var originR = gazeDataEventArgs.RightEye.GazeOrigin.PositionInTrackBoxCoordinates;
var originL = gazeDataEventArgs.LeftEye.GazeOrigin.PositionInTrackBoxCoordinates;
gazeData.GazeOrigin_X_Median = (originR.X + originL.X) / 2.0;
gazeData.GazeOrigin_Y_Median = (originR.Y + originL.Y) / 2.0;
gazeData.GazeOrigin_Y_Median = (originR.Z + originL.Z) / 2.0;
gazeData.X_3D_Median = gazeDataEventArgs.RightEye.GazePoint.PositionInUserCoordinates.X;
gazeData.Y_3D_Median = gazeDataEventArgs.RightEye.GazePoint.PositionInUserCoordinates.Y;
gazeData.Z_3D_Median = gazeDataEventArgs.RightEye.GazePoint.PositionInUserCoordinates.Z;
// Map Validity Values
gazeData.GazePointValidity_Left = gazeDataEventArgs.LeftEye.GazePoint.Validity == Validity.Valid ? true : false;
gazeData.GazePointValidity_Right = gazeDataEventArgs.RightEye.GazePoint.Validity == Validity.Valid ? true : false;
gazeData.PupilValidity_Left = gazeDataEventArgs.LeftEye.Pupil.Validity == Validity.Valid ? true : false;
gazeData.PupilValidity_Right = gazeDataEventArgs.RightEye.Pupil.Validity == Validity.Valid ? true : false;
// Compute Median Gaze Points
gazeData.Y_Median = (gazeData.Y_Left + gazeData.Y_Right) / 2;
gazeData.X_Median = (gazeData.X_Left + gazeData.X_Right) / 2;
if (!double.IsNaN(gazeData.X_Median))
{
GazeDataProcessor.ProcessGazeData(gazeData);
GazeDataProcessor.ProcessFixationData(null, gazeData);
}
};
}
