TrivBzrTVDegreeRaise
Section: C Library Functions (3)
Updated: IRIT Version 6.0
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NAME
TrivBzrTVDegreeRaise()
SYNOPSIS
triv_lib/trivrais.c:69
TrivTVStruct *TrivBzrTVDegreeRaise(TrivTVStruct *TV, TrivTVDirType Dir)
DESCRIPTION
Returns a new Bezier trivariate, identical to the original but with one
degree higher, in the requested direction Dir.
Let old control polygon be P(i), i = 0 to k-1, and Q(i) be new one then:
i k-i
Q(0) = P(0), Q(i) = --- P(i-1) + (---) P(i), Q(k) = P(k-1).
k k
This is applied to all rows/cols of the trivariate.
PARAMETERS:
TV: To raise it degree by one.
Dir: Direction of degree raising. Either U, V or W.
FUNCTION RETURN VALUE
TrivTVStruct *: A surface with one degree higher in direction Dir,
representing the same geometry as TV.
ORIGIN
(C) Copyright 1989/90-95 Gershon Elber, Technion, IIT
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- PARAMETERS:
-
- FUNCTION RETURN VALUE
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- ORIGIN
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