.TH BspSrfKnotInsert 3 "IRIT Version 6.0" 
.SH NAME
BspSrfKnotInsert()
.SH SYNOPSIS
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cagd_lib/bspboehm.c:142

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CagdSrfStruct *BspSrfKnotInsert(CagdSrfStruct *Srf,
                                CagdSrfDirType Dir,
                                CagdRType t)
.SH DESCRIPTION
Returns a new surface refined at t (t is inserted as a new knot in Srf)
in parametric directipn Dir. See BspCrvKnotInsert for the mathematical
background of this knot insertion algorithm.
.SH PARAMETERS:

Srf: To refine by adding a new knot with value equal to t. If Srf
is a periodic curve, it is first unwrapped to a float end
condition curve.

Dir: Of refinement, either U or V.

t: New knot to insert into Srf.
.SH FUNCTION RETURN VALUE
CagdSrfStruct *:  The refined surface.
.SH SEE ALSO
BspSrfKnotInsertNSame,
BspSrfKnotInsertNDiff,
BspCrvKnotInsert,
BspKnotEvalAlphaCoef,
.LP
.SH ORIGIN
(C) Copyright 1989/90-95 Gershon Elber, Technion, IIT