public EyeMoveCalculation CalculateSaccadeParams(EyeMove saccadePosition, EyeMoveTypes eyeMoveType)
{
var frameCount = Math.Abs(saccadePosition.EyeEndIndex - saccadePosition.EyeStartIndex); //+ 1;
var duration = frameCount / this.trackerFrequency;
var spotEyeIndexDiff = Math.Abs(saccadePosition.EyeStartIndex - saccadePosition.SpotMove.SpotStartIndex);
var latency = (spotEyeIndexDiff / this.trackerFrequency);
double[] saccadeCoords;
if (eyeCoords.Length > 1)
{
saccadeCoords = eyeCoords.Skip(saccadePosition.EyeStartIndex).Take(Math.Abs(saccadePosition.EyeEndIndex - saccadePosition.EyeStartIndex) + 1).ToArray();
}
else
{
saccadeCoords = eyeCoords;
}
var spotLenght = (saccadePosition.SpotMove.SpotEndIndex - saccadePosition.SpotMove.SpotStartIndex);
var spotMove = spotCoords.Skip(saccadePosition.SpotMove.SpotStartIndex).Take(spotLenght).ToArray();
var eyeMoveDistancesOnScreen = CountOnScreenDistance(saccadeCoords);
var multipiedDistanceOnScreen = eyeMoveDistancesOnScreen.Sum();
var spotMoveDistanceOnScreen = CountOnScreenDistance(spotMove).Sum();
var tangens = multipiedDistanceOnScreen / this.distanceFromScreen;
var ampInRadians = Math.Atan(tangens);
var amplitude = Math.Round(RadianToDegree(ampInRadians));
var maxEyeDistance = eyeMoveDistancesOnScreen.Max();
var movePrecentage = (maxEyeDistance / multipiedDistanceOnScreen) * 100;
var maxAmpPercentage = (amplitude / 100) * movePrecentage;
var maxVelocity = maxAmpPercentage / 0.016; /* 0.016 = one frame*/
var velocity = amplitude / duration;
var gain = multipiedDistanceOnScreen / spotMoveDistanceOnScreen;
return(new EyeMoveCalculation
{
EyeMove = saccadePosition,
LatencyFrameCount = Convert.ToInt32(spotEyeIndexDiff),
DurationFrameCount = Convert.ToInt32(frameCount),
Latency = Math.Round(latency, 3),
Duration = Math.Round(duration, 3),
Distance = Math.Round(multipiedDistanceOnScreen, 3),
Amplitude = amplitude,
AvgVelocity = Math.Round(velocity, 0),
MaxVelocity = Math.Round(maxVelocity, 0),
Gain = Math.Round(gain, 2)
});
}
public static EyeMove GetSaccadePositionItem(int id, int saccadeStartIndex, int saccadeEndIndex, EyeMove prevoiusSaccadeItem, ResultData results)
{
var eyeMove = new EyeMove
{
Id = id,
IsStartFound = prevoiusSaccadeItem.IsStartFound,
EyeStartIndex = saccadeStartIndex,
EyeStartTime = results.TimeDeltas[saccadeStartIndex],
EyeStartCoord = results.EyeCoords[saccadeStartIndex],
IsEndFound = prevoiusSaccadeItem.IsEndFound,
EyeEndIndex = saccadeEndIndex,
EyeEndTime = results.TimeDeltas[saccadeEndIndex],
EyeEndCoord = results.EyeCoords[saccadeEndIndex],
SpotMove = prevoiusSaccadeItem.SpotMove
};
eyeMove = EyeMoveSearchToolBox.CountTestValuesForEyeMove(eyeMove, results);
return(eyeMove);
}
