BzrCrvTangent
Section: C Library Functions (3)
Updated: IRIT Version 6.0
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NAME
BzrCrvTangent()
SYNOPSIS
cagd_lib/cbzr_aux.c:172
CagdVecStruct *BzrCrvTangent(CagdCrvStruct *Crv, CagdRType t)
DESCRIPTION
Returns a unit vector, equal to the tangent to Crv at parameter value t.
Algorithm: pseudo subdivide Crv at t and using control point of
subdivided curve find the tangent as the difference of the 2 end points.
PARAMETERS:
Crv: Crv for which to compute a unit tangent.
t: The parameter at which to compute the unit tangent.
FUNCTION RETURN VALUE
CagdVecStruct *: A pointer to a static vector holding the tangent
information.
ORIGIN
(C) Copyright 1989/90-95 Gershon Elber, Technion, IIT
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- PARAMETERS:
-
- FUNCTION RETURN VALUE
-
- ORIGIN
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