Appends a cubic Bézier curve to (x3, y3) with two control points (c).
public void CurveTo(double x1, double y1, double x2, double y2, double x3, double y3)
The first control point's horizontal coordinate.
The first control point's vertical coordinate.
The second control point's horizontal coordinate.
The second control point's vertical coordinate.
The end point's horizontal coordinate.
The end point's vertical coordinate.
ISO 32000-2 §8.5.2.2, Table 58.