Translations:Draft CubicBezCurve/19/en

For each cubic Bézier segment four points must be used, of which the two extreme points indicate where the spline passes through, and the two intermediate points are control points.
 * If only 3 points are given, it creates a quadratic Bézier instead, with only one control point.
 * If only 2 points are given, it creates a linear Bézier, that is, a straight line.
 * If 5 points are given, the first 4 create a cubic Bézier segment; the 4th and the 5th points are used to create a straight line.
 * If 6 points are given, the first 4 create a cubic Bézier segment; the 4th and the other two points are used to create a quadratic Bézier segment.
 * If 7 points are given, the first 4 create a cubic Bézier segment; the 4th and the other three points are used to create a second cubic Bézier segment.
 * In general, the last point in a group of four is shared with the following three points maximum to create another Bézier segment.
 * To have smooth curves, with no straight segments, the number of points should be or, where  is the number of segments, for.