protected override List <PointF> GetPoints()
{
CubicBezier cb = new CubicBezier();
cb.StartPoint = Start;
cb.EndPoint = End;
cb.Control1 = control1;
cb.Control2 = control2;
cb.Resolution = 100;
cb.CalculatePoints();
List <PointF> ret = new List <PointF>();
ret.AddRange(cb.Points);
return(ret);
}