Translations:Draft CubicBezCurve/19/en

For each cubic Bezier segment four points must be used, of which the two intermediate points are the control points.
 * If only 3 points are given, it creates a quadratic Bezier instead.
 * If only 2 points are given, it creates a linear Bezier, that is, a straight line.
 * If 5 points are given, the first 4 create a cubic Bezier segment; the fourth and the fifth points are used to create a straight line.
 * If 6 points are given, the first 4 create a cubic Bezier segment; the fourth and the other two points are used to create a quadratic Bezier segment.
 * If 7 points are given, the first 4 create a cubic Bezier segment; the fourth and the other three are used to create a second cubic Bezier segment.
 * That is, whenever possible, the last point in a cubic Bezier is shared withe following points.