//-----------------------------------------------------------------------
public void Curve4(double x1, double y1,
double x2, double y2,
double x3, double y3)
{
_latestSVGPathCmd = SvgPathCommand.CurveTo;
_c2 = new Vector2(x2, y2);
_myvxs.AddC4To(
x1, y1,
x2, y2,
_latest_x = x3, _latest_y = y3
);
}