NAME
          DtNurbsGetUKnotVector - Get the u knot vectors for the given
          NURBS surface.


     SYNOPSIS
          #include <Dt.h>


          int  DtNurbsGetUKnotVector( int shapeID, int groupID, int *num, float **uKnotVector )


     DESCRIPTION
          DtNurbsGetUKnotVector() returns the U knot vectors for the
          NURBS surface via the pointer to the variable uKnotVector.
          The number of knot vectors in the surface is returned via
          the pointer to num. The U knot vectors are shapeID and group
          groupID.


     IMPLEMENTATION
          The AliasAPI implementation of Dt does not support any
          NURBS geometry.  No NURBS geometry will be returned by this
          function.


     DIAGNOSTICS
          DtNurbsGetUKnotVector() returns one on success and zero on
          failure.


     FILES
          Link with -lDtOMio