NRBDEGELEV: Elevate the degree of the NURBS curve, surface or volume.
 
 Calling Sequence:
 
   ecrv = nrbdegelev(crv,utimes);
   esrf = nrbdegelev(srf,[utimes,vtimes]);
   evol = nrbdegelev(vol,[utimes,vtimes,wtimes]);
 
 INPUT:
 
   crv		: NURBS curve, see nrbmak.
 
   srf		: NURBS surface, see nrbmak.
 
   vol		: NURBS volume, see nrbmak.
 
   utimes	: Increase the degree along U direction utimes.
 
   vtimes	: Increase the degree along V direction vtimes.
 
   wtimes	: Increase the degree along W direction vtimes.

 OUTPUT:

   ecrv	: new NURBS structure for a curve with degree elevated.
 
   esrf	: new NURBS structure for a surface with degree elevated.
 
   evol	: new NURBS structure for a volume with degree elevated.
 
 
 Description:
 
   Degree elevates the NURBS curve or surface. This function uses the
   B-Spline function bspdegelev, which interface to an internal 'C'
   routine.
 
 Examples:
 
   Increase the NURBS surface twice along the V direction.
   esrf = nrbdegelev(srf, [0, 2]); 
 
 See also:
 
   bspdegelev

    Copyright (C) 2000 Mark Spink, 2010 Rafel Vazquez

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

Demonstration 1

The following code

 crv = nrbtestcrv;
 plot(crv.coefs(1,:),crv.coefs(2,:),'bo')
 title('Degree elevation along test curve: curve and control polygons.');
 hold on;
 plot(crv.coefs(1,:),crv.coefs(2,:),'b--');
 nrbplot(crv,48);

 icrv = nrbdegelev(crv, 1);

 plot(icrv.coefs(1,:),icrv.coefs(2,:),'ro')
 plot(icrv.coefs(1,:),icrv.coefs(2,:),'r--');
 
 hold off;

Produces the following figure

Figure 1

Package: nurbs