public AccelDataPoint(AccelDataPoint other)
{
this.t = other.t;
this.x = other.x;
this.y = other.y;
this.z = other.z;
this.t_abs = other.t_abs;
}
void Update()
{
float timeSinceStart;
accel = Input.acceleration;
// Initialize low pass to first point
if (accel_smoothed == null)
{
timeSinceStart = Time.realtimeSinceStartup;
accel_smoothed = new AccelDataPoint(timeSinceStart, accel);
accel_buffer.Add(new AccelDataPoint(accel_smoothed));
}
// Low pass filter to attenuate jitter. If we were double-integrating,
// this would cause drift, but we're not.
timeSinceStart = Time.realtimeSinceStartup;
accel_smoothed = new AccelDataPoint(timeSinceStart,
ALPHA * accel + (1 - ALPHA) *
accel_smoothed.toVector());
// Add this acceleration to our history buffer
accel_buffer.Add(new AccelDataPoint(accel_smoothed));
// Loop over history buffer, update time offsets of past accel values
int i = 0;
int n = accel_buffer.Count;
while (i < n - 1)
{
accel_buffer[i].t -= Time.deltaTime;
if (accel_buffer[i].t < LOOKBACK)
{
accel_buffer.RemoveAt(i);
i--;
n--;
}
i++;
}
if (recording)
{
record.Add(new AccelDataPoint(accel_smoothed));
report = "recording...";
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 accel_buffer
foreach (KeyValuePair <string, List <AccelDataPoint> > item in patternDict)
{
float tempDTW = getDTW(accel_buffer, item.Value);
if (tempDTW < minDTW)
{
minDTW = tempDTW;
matchedPattern = item.Key;
}
}
if (minDTW < MATCH_THRESHOLD)
{
if (timeSinceDetected < 2.0f)
{
report = matchedPattern + "\nDTWscore:" + minDTW;
//pattern.lastRecognition = Time.realtimeSinceStartup;
timeSinceDetected += Time.deltaTime;
}
else
{
timeSinceDetected = 0;
timeSinceStart = 0; // CHECK REDUNDANCY
}
}
else
{
report = "";
//report = "pattern not recognized";
timeSinceStart = 0; // CHECK REDUNDANCY
}
}
}
