public void OnSensorChanged(double x, double y, double z, DateTimeOffset now)
{
// calculate movement
var totalMovement = Math.Abs(x + y + z - _lastX - _lastY - _lastZ);
if (totalMovement > MinimumForce)
{
// store first movement time
if (_firstDirectionChangeTime == DateTimeOffset.MinValue)
{
_firstDirectionChangeTime = now;
_lastDirectionChangeTime = now;
}
// check if the last movement was not long ago
var lastChangeWasAgo = (now - _lastDirectionChangeTime).TotalMilliseconds;
if (lastChangeWasAgo < MaxPauseBetweenDirectionChange)
{
// store movement data
_lastDirectionChangeTime = now;
_directionChangeCount++;
// store last sensor data
_lastX = x;
_lastY = y;
_lastZ = z;
// check how many movements are so far
if (_directionChangeCount >= MinDirectionChange)
{
// check total duration
var totalDuration = (now - _firstDirectionChangeTime).TotalMilliseconds;
if (totalDuration < MaxDurationOfShake)
{
ResetShake();
_accelerometer.OnShaken(now);
}
}
}
else
{
ResetShake();
}
}
}