SymbSrfIsoFocalSrf
Section: C Library Functions (3)
Updated: IRIT Version 6.0
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NAME
SymbSrfIsoFocalSrf()
SYNOPSIS
symb_lib/curvatur.c:926
CagdSrfStruct *SymbSrfIsoFocalSrf(CagdSrfStruct *Srf, CagdSrfDirType Dir)
DESCRIPTION
Computes a focal surface for a principal curvature in an isoparametric
direction. For the u isoparametric direction,
1 G11
F(u, v) = n(u, v) --------- = n(u, v) ---
u
k (u, v) L11
n
Because Lii also has n(u,v) we can use the nonnormalized surface normal
to compute F(u, v), which is therefore computable and representable.
PARAMETERS:
Srf: Surface to compute iso focal surface.
Dir: Direction to compute iso focal surface. Either U or V.
FUNCTION RETURN VALUE
CagdSrfStruct *: A surface representing the iso focal surface.
SEE ALSO
SymbSrfFff,
SymbSrfSff,
SymbSrf2DDeterminant,
SymbSrfGaussCurvature,
,
SymbSrfMeanEvolute,
SymbSrfMeanCurvatureSqr,
SymbSrfCurvatureUpperBound,
,
SymbSrfIsoDirNormalCurvatureBound,
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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