public void StartGazeDataStreams(
GazePointCallback gazePointCallback, string gazePointDataFilePath,
FixationCallback fixationCallback, string fixationsDataFilePath,
EyePositionCallback eyePositionCallback, string eyePositionDataFilePath)
{
isGazePointDataRecording = false;
isFixationDataRecording = false;
isEyePositionDataRecording = false;
GazePointEvent = null;
if (gazePointDataFilePath != null)
{
GazePointEvent += gazePointCallback;
//Load gaze point data
using (var sr = File.OpenText(gazePointDataFilePath))
{
//Heading
var line = sr.ReadLine();
var columns = line.Split(',');
int gazeXIndex = columns.ToList().IndexOf("gazeX");
int gazeYIndex = columns.ToList().IndexOf("gazeY");
int gazeTimestampIndex = columns.ToList().IndexOf("gazeTimestamp");
while (!sr.EndOfStream)
{
line = sr.ReadLine();
var columnValues = line.Split(',').Select(x => Double.Parse(x)).ToArray();;
gazePoints.Enqueue(new GazePointEventArgs(columnValues[gazeXIndex], columnValues[gazeYIndex], columnValues[gazeTimestampIndex]));
}
}
}
FixationEvent = null;
if (fixationsDataFilePath != null)
{
FixationEvent += fixationCallback;
//Load fixation data
using (var sr = File.OpenText(fixationsDataFilePath))
{
//Heading
var line = sr.ReadLine();
var columns = line.Split(',');
int fixationEventTypeIndex = columns.ToList().IndexOf("fixationEventType");
int fixationXIndex = columns.ToList().IndexOf("fixationX");
int fixationYIndex = columns.ToList().IndexOf("fixationY");
int fixationTimestampIndex = columns.ToList().IndexOf("fixationTimestamp");
while (!sr.EndOfStream)
{
line = sr.ReadLine();
var columnValues = line.Split(',').ToArray();
Enum.TryParse(columnValues[fixationEventTypeIndex], out FixationDataEventType eventType);
fixations.Enqueue(new FixationEventArgs(eventType,
Double.Parse(columnValues[fixationXIndex]),
Double.Parse(columnValues[fixationYIndex]),
Double.Parse(columnValues[fixationTimestampIndex])
));
}
}
}
if (eyePositionDataFilePath != null)
{
EyePositionEvent += eyePositionCallback;
//Load eye position data
using (var sr = File.OpenText(eyePositionDataFilePath))
{
//Heading
var line = sr.ReadLine();
var columns = line.Split(',');
int leftIsValidIndex = columns.ToList().IndexOf("leftIsValid");
int leftNormalisedIsValidIndex = columns.ToList().IndexOf("leftNormalisedIsValid");
int rightIsValidIndex = columns.ToList().IndexOf("rightIsValid");
int rightNormalisedIsValidIndex = columns.ToList().IndexOf("rightNormalisedIsValid");
int eyePositionTimestampIndex = columns.ToList().IndexOf("eyePositionTimestamp");
while (!sr.EndOfStream)
{
line = sr.ReadLine();
var columnValues = line.Split(',').ToArray();
Func <int, EyePosition> ParseEyePositionBlock = i =>
new EyePosition(
Boolean.Parse(columnValues[i]),
Double.Parse(columnValues[i + 1]),
Double.Parse(columnValues[i + 2]),
Double.Parse(columnValues[i + 3])
);
eyePositions.Enqueue(new EyePositionEventArgs(
ParseEyePositionBlock(leftIsValidIndex),
ParseEyePositionBlock(leftNormalisedIsValidIndex),
ParseEyePositionBlock(rightIsValidIndex),
ParseEyePositionBlock(rightNormalisedIsValidIndex),
Double.Parse(columnValues[eyePositionTimestampIndex])
));
}
}
}
replayTimer = new Timer();
replayTimer.Interval = 16;//ms
replayTimer.Tick += (s, e) =>
{
if (gazePoints.TryDequeue(out GazePointEventArgs gp))
{
GazePointEvent.Invoke(s, gp);
}
if (fixations.TryDequeue(out FixationEventArgs f))
{
FixationEvent.Invoke(s, f);
}
if (eyePositions.TryDequeue(out EyePositionEventArgs ep))
{
EyePositionEvent.Invoke(s, ep);
}
if (gazePoints.Count() == 0 && fixations.Count() == 0 && eyePositions.Count() == 0)
{
replayTimer.Stop();
replayTimer.Enabled = false;
replayTimer.Dispose();
}
};
replayTimer.Start();
replayTimer.Enabled = true;
}
private void InvokeGazePointEvent(object s, GazePointEventArgs e)
{
GazePointEvent.Invoke(s, e);
}