private void AnalyzeSamples()
{
currentTrackingQuality = GetStatus();
EyeCount quality = VisibleEyesCount(currentTrackboxObj);
if (quality == EyeCount.One || quality == EyeCount.Two)
{
badSuccessiveSamples = 0;
latestGoodSample = currentTrackboxObj;
// calculate eye angle if both eyes are visible
if (quality == EyeCount.Two)
{
float dx = currentTrackboxObj.Right.X - currentTrackboxObj.Left.X;
float dy = currentTrackboxObj.Right.Y - currentTrackboxObj.Left.Y;
latestNormalizedDistance = Math.Sqrt(dx * dx + dy * dy);
latestAngle = RadToDeg * Math.Atan2(dy * controlSize.Height, dx * controlSize.Width);
}
}
else
{
// we are forgiving with a couple of bad samples
badSuccessiveSamples++;
if (badSuccessiveSamples < MAX_BAD_SAMPLES)
{
currentTrackboxObj = latestGoodSample;
}
}
}
private void UpdateEye(FrameworkElement eye, PointF pos, EyeCount validity, TransformGroup transformation)
{
if (pos != PointF.Empty && validity <= EyeCount.Two)
{
eye.Visibility = Visibility.Visible;
var scale = eyeScale + DoEyeSizeDiff() * eyeScale;
var x = pos.X * controlSize.Width;
var y = pos.Y * controlSize.Height;
((RotateTransform)transformation.Children[0]).Angle = latestAngle;
((ScaleTransform)transformation.Children[1]).ScaleX = scale;
((ScaleTransform)transformation.Children[1]).ScaleY = scale;
((TranslateTransform)transformation.Children[2]).X = x - (eye.ActualWidth) / 2;
((TranslateTransform)transformation.Children[2]).Y = y - (eye.ActualHeight) / 2;
}
else
{
eye.Visibility = Visibility.Collapsed;
}
}
private void UpdateEye(Image eye, PointF pos, EyeCount validity, TransformGroup transformation)
{
if (pos != PointF.Empty && validity <= EyeCount.Two)
{
eye.Visibility = Visibility.Visible;
var scale = EyeScale + DoEyeSizeDiff() * EyeScale;
var x = pos.X * ControlSize.Width;
var y = pos.Y * ControlSize.Height;
((RotateTransform)transformation.Children[0]).Angle = LatestAngle;
((ScaleTransform)transformation.Children[1]).ScaleX = scale;
((ScaleTransform)transformation.Children[1]).ScaleY = scale;
((TranslateTransform)transformation.Children[2]).X = x - (eye.ActualWidth) / 2;
((TranslateTransform)transformation.Children[2]).Y = y - (eye.ActualHeight) / 2;
eye.RenderTransform = transformation;
}
else
{
eye.Visibility = Visibility.Collapsed;
}
}
