protected void CalculateAngle()
{
//Create line from the base of the whisker to the point on the whisker
IWhiskerPoint baseWhiskerPoint = ControlPoints.Last();
BasePoint = new Point(baseWhiskerPoint.XRatio * VideoWidth, baseWhiskerPoint.YRatio * VideoHeight);
Point anglePoint;
Vector gradient;
if (TValue == 1)
{
//If TValue == 1 (Point on whisker == base), calculate gradient at TValue = 1
gradient = GetBezierGradientVideoSize();
gradient *= -1;
anglePoint = BasePoint;
anglePoint.X += gradient.X;
anglePoint.Y += gradient.Y;
}
else
{
anglePoint = GetTValuePoint();
gradient = new Vector(anglePoint.X - BasePoint.X, anglePoint.Y - BasePoint.Y);
}
//Create line which will determine angle
gradient.Normalize();
TargetPoint = anglePoint;
AngleLine = gradient;
Angle = AngleType.CalculateAngle(AngleLine);
}