NRBMODP: Modify the coordinates of specific control points of any NURBS
 map. The weight is not changed.

 Calling Sequence:
 
   nrb = nrbmodp (nrb, move, index);
   
    INPUT:
   
      nrb   - NURBS map to be modified.
      move  - vector specifying the displacement of all the ctrl points.
      index - indeces of the control points to be modified.
   
    OUTPUT:
   
      mnrb - the modified NURBS.
   
 Copyright (C) 2015 Jacopo Corno

    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.

Package: nurbs