BzrSrfDerive
Section: C Library Functions (3)
Updated: IRIT Version 6.0
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NAME
BzrSrfDerive()
SYNOPSIS
cagd_lib/sbzr_aux.c:197
CagdSrfStruct *BzrSrfDerive(CagdSrfStruct *Srf, CagdSrfDirType Dir)
DESCRIPTION
Returns a new surface equal to the given surface, differentiated once in
the direction Dir.
Let old control polygon be P(i), i = 0 to k-1, and Q(i) be new one then:
Q(i) = (k - 1) * (P(i+1) - P(i)), i = 0 to k-2.
This is applied to all rows/cols of the surface.
PARAMETERS:
Srf: To differentiate.
Dir: Direction of differentiation. Either U or V.
FUNCTION RETURN VALUE
CagdSrfStruct *: Differentiated surface.
SEE ALSO
CagdSrfDerive,
BspSrfDerive,
BzrSrfDeriveRational,
BspSrfDeriveRational,
ORIGIN
(C) Copyright 1989/90-95 Gershon Elber, Technion, IIT
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- PARAMETERS:
-
- FUNCTION RETURN VALUE
-
- SEE ALSO
-
- ORIGIN
-
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