private void OnNewCoordinates(TobiiCoordinates coordinates)
{
lock (Helpers.locker)
{
if (mouse_state == MouseState.Idle &&
(DateTime.Now - idle_start_time).TotalSeconds > 60)
{
CoordinateSmoother.Reset();
return;
}
if (DateTime.Now > freeze_until)
{
if (mouse_state == MouseState.Calibrating &&
Helpers.GetDistance(coordinates.gaze_point, calibration_start_gaze_point) > Options.Instance.reset_calibration_zone_size)
{
mouse_state = MouseState.Controlling;
}
if (mouse_state == MouseState.Calibrating)
{
// The only thing to update while calibrating is gaze point.
float[] coordinates_copy = new float[smoothened_error_correction.сoordinates.Length];
smoothened_error_correction.сoordinates.CopyTo(coordinates_copy, 0);
var smoothened_error_correction_clone = new EyeTrackerErrorCorrection(coordinates_copy, smoothened_error_correction.shift);
smoothened_error_correction_clone.сoordinates[0] = coordinates.gaze_point.X;
smoothened_error_correction_clone.сoordinates[1] = coordinates.gaze_point.Y;
smoothened_error_correction = CoordinateSmoother.Smoothen(smoothened_error_correction_clone);
}
else
{
// The eye tracker provides shaky data that has to be smoothened before transforming to the mouse cursor position.
// |CalibrationManager| amplifies this shaking.
// To cancel the amplification we smoothen data BEFORE it goes to |CalibrationManager|.
//
// Another problem is |CalibrationManager| also may be a source of shaking (even on smoothened input).
// So in addition to smoothening its input we have to smoothen its output.
// Smoothening data twice leads to bigger latency but otherwise, the cursor shakes.
// Big latency is compensated by |instant_jump_distance|.
var shift = smoothened_error_correction == null ? new Point(0, 0) : CalibrationManager.Instance.GetShift(smoothened_error_correction.сoordinates);
var shaky_coordinates = coordinates.ToCoordinates(Options.Instance.calibration_mode.additional_dimensions_configuration);
smoothened_error_correction = CoordinateSmoother.Smoothen(new EyeTrackerErrorCorrection(shaky_coordinates, shift));
}
}
else
{
// Adds inertia on exit from freeze state.
CoordinateSmoother.Smoothen(smoothened_error_correction);
}
if (mouse_state == MouseState.Controlling || mouse_state == MouseState.Calibrating)
{
UpdateCursorPosition();
}
}
}
private void StartCalibration()
{
if (mouse_state != MouseState.Calibrating)
{
calibration_start_gaze_point =
new Point((int)smoothened_error_correction.сoordinates[0],
(int)smoothened_error_correction.сoordinates[1]);
mouse_state = MouseState.Calibrating;
}
freeze_until = DateTime.Now.AddMilliseconds(Options.Instance.calibrate_freeze_time_ms);
statistics.OnCalibrate();
CoordinateSmoother.Reset();
}
public void StartCalibration(bool dynamic_calibration)
{
this.dynamic_calibration = dynamic_calibration;
if (mouse_state != MouseState.Calibrating)
{
calibration_start_gaze_point =
new Point((int)smoothened_error_correction.сoordinates[0],
(int)smoothened_error_correction.сoordinates[1]);
mouse_state = MouseState.Calibrating;
}
freeze_until = DateTime.Now.AddMilliseconds(Options.Instance.calibrate_freeze_time_ms);
CoordinateSmoother.Reset();
}