﻿## 0
Shape of NURBS curves can be modified by parameters and constraints, if you constrain the curves interpolation points. NURBS curves used in 2D profiles are interpolation NURBS of third degree.
## 3
Selecting a method of constraint
## 6
Definition of a distance to the center of coordinates. The distance is defined as a parameter. In following steps, the parametric distance is defined for multiple interpolation points.
## 20
The cam before change of the shape – value of parameters was not changed yet
## 21
Changing distances of points from the center – the parameters are modified
## 31
The cam after parametric change of the shape
