Degree elevation of changeable degree spline

Changeable degree spline (CD-spline), a direct extension of the B-spline, allows different segments to possess different degrees. In this paper, we present a method for degree elevation of a CD-spline. The method is flexible, as it applies to any segment of any CD-spline elevated by any degree. A CD-spline can be transformed into a B-spline, and vice versa, in various orders by using this method. Moreover, this degree elevation method is presented as a corner cutting process.