PathQuadraticCurveToRel
Draws a quadratic Bezier curve from the current point to (x, y) using (x1, y1) as the control
point using relative coordinates. At the end of the command, the new current point becomes
the final (x, y) coordinate pair used in the polybezier.
Initializes a new instance of the PathQuadraticCurveToRel class.
Initializes a new instance of the PathQuadraticCurveToRel class.