// Data analysis (called in OnTargetDestroyed)
private void analyze()
{
// get filtered acceleration (from start to when target destroyed)
List <Vector3> accData = tiltManager.filtAccRecord;
// on-device analysis (not implemented 2016-01-28)
float targetDirectionRad = float.Parse(experimentalParameters["Target Direction"]) * Mathf.Deg2Rad;
Vector3 unitVecToTarget = new Vector3(Mathf.Cos(targetDirectionRad), Mathf.Sin(targetDirectionRad), 0f);
int tMaxDev = 0;
float maxDev = 0f;
int tMaxVel = 0;
float maxVel = 0f;
int nRecord = accData.Count;
float[] deviationFromStraight = new float[nRecord];
float[] angularDeviation = new float[nRecord];
float[] playerVelocity = new float[nRecord];
for (int iRecord = 0; iRecord < nRecord; iRecord++)
{
// hi-freq (200Hz for Nexus, same as acceleration) cursor data (not presented to subjects) from filtered acceleration
Vector3 playerPos = cursor.Acc2CursorPosition(accData[iRecord]);
// angular deviation
float xx = Mathf.Cos(-targetDirectionRad) * playerPos.x - Mathf.Sin(-targetDirectionRad) * playerPos.y;
float yy = Mathf.Sin(-targetDirectionRad) * playerPos.x + Mathf.Cos(-targetDirectionRad) * playerPos.y;
angularDeviation[iRecord] = Mathf.Atan2(yy, xx) * Mathf.Rad2Deg;
// deviation from a straight line to the target
Vector3 projectionVec = Vector3.Project(unitVecToTarget, playerPos);
Vector3 orthogonalVec = playerPos - projectionVec;
float dev = orthogonalVec.magnitude;
deviationFromStraight[iRecord] = dev;
if (dev > maxDev)
{
tMaxDev = iRecord;
maxDev = dev;
}
// player velocity
// Debug.Log("index: " + iRecord);
float vel;
if (iRecord == 0)
{
vel = 0f;
}
else
{
Vector3 prevPlayerPos = cursor.Acc2CursorPosition(accData[iRecord - 1]);
vel = (playerPos - prevPlayerPos).magnitude / float.Parse(Config.instance.configParameters["Sampling Interval"]);;
}
playerVelocity[iRecord] = vel;
if (vel > maxVel)
{
tMaxVel = iRecord;
maxVel = vel;
}
}
// maximum deviation
maxDev = maxDev * Mathf.Sign(angularDeviation[tMaxDev]);
float angDev = angularDeviation[tMaxVel];
// result dictionary
Dictionary <string, string> result = new Dictionary <string, string>();
result.Add("tMaxDevFromStraight", tMaxDev.ToString("N0"));
result.Add("MaxDevFromStraight", maxDev.ToString("N3"));
result.Add("tMaxVel", tMaxVel.ToString("N0"));
result.Add("MaxAngDevAtTMaxVel", angDev.ToString("N3"));
// output
resultOfTrial = result;
experimentManager.AddResultToList(result);
}