BspKnotNodes

Section: C Library Functions (3)
Updated: IRIT Version 6.0
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NAME

BspKnotNodes()  

SYNOPSIS

cagd_lib/bsp_knot.c:861

CagdRType *BspKnotNodes(CagdRType *KnotVector, int Len, int Order)
 

DESCRIPTION

Creates a new vector with the given KnotVector Node values. The given knot vector is assumed to have open end conditions. The nodes are the approximated parametric value associated with the each control point. Therefore for a knot vector of length Len and order Order there are Len - Order control points and therefore nodes. Nodes are defined as (k = Order - 1 or degree):


         i+k
          -                            First Node N(i = 0)
          \
          / KnotVector(j)              Last Node  N(i = Len - k - 2)
          -
        j=i+1
 N(i) = -----------------
               k

See also BspKnotAverage.  

PARAMETERS:

KnotVector: To average out as nodes.

Len: Length of KnotVector. This is not the length of the curve or surface using this knot vector.

Order: Of curve or surface that exploits this knot vector.  

FUNCTION RETURN VALUE

CagdRType *: The nodes computed for the given knot vector.

 

ORIGIN

(C) Copyright 1989/90-95 Gershon Elber, Technion, IIT


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS:
FUNCTION RETURN VALUE
ORIGIN

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