.TH SREFINE
 6 "IRIT Version 6.0" 
.SH NAME
SREFINE



 SurfaceType SREFINE( SurfaceType Srf, ConstantType Direction,
                      NumericType Replace, ListType KnotList )

Provides the ability to Replace a knot vector of Srf or refine 
it in the specified direction Direction (ROW or COL).
KnotList is a list of knots to refine Srf at. All knots should be
contained in the parametric domain of Srf in Direction. If the knot
vector is replaced, the length of KnotList should be identical to the
length of the original knot vector of Srf in Direction. If Srf
is a Bezier surface, it is automatically promoted to be a Bspline surface.

Example:

    Srf = SREFINE( SREFINE( Srf,
                            ROW, FALSE, list( 0.333, 0.667 ) ),
                   COL, FALSE, list( 0.333, 0.667 ) );

refines Srf in both directions by adding two more knots at 0.333 and
0.667.