nrbcirc

 
 NRBCIRC: Construct a circular arc.
 
 Calling Sequence:
 
   crv = nrbarc
   crv = nrbarc(radius)
   crv = nrbarc(radius,center)
   crv = nrbarc(radius,center,sang,eang)
 
 Parameters:
 
   radius    : Radius of the circle, default 1.0
 
   center    : Center of the circle, default (0,0,0)
 
   sang    : Start angle, default 0 degrees
 
   eang    : End angle 360 degrees
 
   crv        : NURBS curve for a circular arc.
 
 Description:
 
   Constructs NURBS data structure for a circular arc in the x-y plane. If
   no rhs arguments are supplied a unit circle with center (0.0,0.0) is
   constructed. 
 
   Angles are defined as positive in the anti-clockwise direction.