// TouchDataPoint constructor that copies from another TouchDataPoint
public TouchDataPoint(TouchDataPoint other)
{
this.t = other.t;
this.x = other.x;
this.y = other.y;
this.t_abs = other.t_abs;
}
void Update()
{
float timeSinceStart;
if (recording)
{
if (Input.touches.Length > 1)
{
touchesRaw = new Vector2(Input.touches[1].position[0], Input.touches[1].position[1]);
}
else
{
touchesRaw = new Vector2(0, 0);
}
}
else
{
if (Input.touches.Length == 0)
{
touchesRaw = new Vector2(0, 0);
}
else
{
touchesRaw = new Vector2(Input.touches[0].position[0], Input.touches[0].position[1]);
}
}
touches = touchesRaw - touchesLast; // the displacement between the current and the last touch coordinates
touchesLast = touchesRaw;
report = "Coordinates: " + touches + "\ntouch count: " + Input.touchCount + "\n";
// Initialize low pass to first point
if (touch_smoothed == null)
{
timeSinceStart = Time.realtimeSinceStartup;
touch_smoothed = new TouchDataPoint(timeSinceStart, touches);
touch_buffer.Add(new TouchDataPoint(touch_smoothed));
}
// Low pass filter to attenuate jitter. If we were double-integrating,
// this would cause drift, but we're not.
timeSinceStart = Time.realtimeSinceStartup;
touch_smoothed = new TouchDataPoint(timeSinceStart,
ALPHA * touches + (1 - ALPHA) *
touch_smoothed.toVector());
// Add this toucheration to our history buffer
touch_buffer.Add(new TouchDataPoint(touch_smoothed));
// Loop over history buffer, update time offsets of past touch values
int i = 0;
int n = touch_buffer.Count;
while (i < n - 1)
{
touch_buffer[i].t -= Time.deltaTime;
if (touch_buffer[i].t < LOOKBACK)
{
touch_buffer.RemoveAt(i);
i--;
n--;
}
i++;
}
if (recording)
{
record.Add(new TouchDataPoint(touch_smoothed));
report += "\nrecording...";
if (record[0].t_abs - Time.realtimeSinceStartup < LOOKBACK)
{
stopRecording();
}
}
else
{
if (record.Count > 0)
{
updateAllTimes(record, record.Last().t_abs);
}
float minDTW = float.PositiveInfinity;
string matchedPattern = "stationary"; // the key to patternDict
//iterate through patternDict to get the best-matched pattern for the current data in touch_buffer
foreach (KeyValuePair <string, List <TouchDataPoint> > item in patternDict)
{
float tempDTW = getDTW(touch_buffer, item.Value);
if (tempDTW < minDTW)
{
minDTW = tempDTW;
matchedPattern = item.Key;
}
}
if (minDTW < MATCH_THRESHOLD)
{
if (timeSinceDetected < DTW_RESULT_DURATION)
{
report += "\n" + matchedPattern + "\nDTWscore:" + minDTW;
//pattern.lastRecognition = Time.realtimeSinceStartup;
timeSinceDetected += Time.deltaTime;
}
else
{
timeSinceDetected = 0;
timeSinceStart = 0; // CHECK REDUNDANCY
}
}
else
{
report += "\npattern not recognized";
timeSinceStart = 0; // CHECK REDUNDANCY
}
}
}
