/// <summary>
//This method has the Action that will be run once a fixation is confirmed passed in and stored in SelectedFicationAction. It also sets the state to RunningFixationDetection,
//which sets logic in RunSelectedActionAtFixation to run on fixationPointDataStream.Next events.
/// </summary>
public void StartDetectingFixation()
{
customfixStream.ResetFixationDetectionState();
pointSmootherWorker = new PointSmoother(pointSmootherBufferSize);
Console.WriteLine("Start detection call");
fixationState = EFixationState.DetectingFixation;
timeOutTimer.Start();
}
/// <summary>
/// This method of is run on gaze events, checks if it is the beginning or end of a fixation and runs appropriate code.
/// </summary>
/// <param name="o"></param>
/// <param name="fixationDataBucket"></param>
private void detectFixation(object o, CustomFixationEventArgs fixationDataBucket)
{
//Check if FixationDetection needs to be monitoring CustomFixation data stream.
if (fixationState == EFixationState.DetectingFixation)
{
GazePoint currentSmoothPoint;
//If databucket state is the start of a fixation
if (fixationDataBucket.Status == EFixationStreamEventType.Start)
{
fixationTimer.Start();
//increment timeout interval so a fixation doesn't get cut off.
timeOutTimer.Interval += FixationDetectionTimeLength + FixationExtensionBuffer;;
Console.WriteLine(timeOutTimer.Interval);
fixationProgressStartTimeStamp = fixationDataBucket.TimeStamp;
//Instantiate new point smoother, this clears out and previous in the ring buffer.
pointSmootherWorker = new PointSmoother(pointSmootherBufferSize);
Console.WriteLine("Fixation Begin X" + fixationDataBucket.X + " Y" + fixationDataBucket.Y);
}
//if fixation data is in the middle of a fixation, use the data returned to highlight progress and draw users current gaze location to the screen.
if (fixationDataBucket.Status == EFixationStreamEventType.Middle)
{
//Check if point smoothing is required.
if (usePointSmoother)
{
//Data smoothing being done in CustomFixationDectection,
currentSmoothPoint = pointSmootherWorker.UpdateAndGetSmoothPoint(fixationDataBucket.X, fixationDataBucket.Y);
xPosFixation = (int)Math.Floor(currentSmoothPoint.x);
yPosFixation = (int)Math.Floor(currentSmoothPoint.y);
}
else
{
//Slightly smoothed data from the Customfixation data stream
xPosFixation = (int)Math.Floor(fixationDataBucket.X);
yPosFixation = (int)Math.Floor(fixationDataBucket.Y);
}
// calculateFixationProgressPercent(fixationDataBucket.TimeStamp);
onFixationProgressEvent(fixationDataBucket.TimeStamp, xPosFixation, yPosFixation);
}
//if the fixation ends before the fixation timer completes, reset the fixation timer.
if (fixationDataBucket.Status == EFixationStreamEventType.End)
{
fixationTimer.Stop();
//customfixStream.ResetFixationDetectionState();
//Debug
Console.WriteLine("Fixation Stopped due to end datatype");
}
}
}