NAME

cxGeoSplineDefine - define a nurb spline

C SPECIFICATION

#include <cx/Geometry.h>

cxGeo cxGeoSplineDefine(
int npoint,
float *point,
int nknot,
float *knot)

FORTRAN SPECIFICATION

integer function cxGeoSplineDefine(npoint,point,nknot,knot)
integer npoint
real point(4, npoint)
integer nknot
real knot(nknot)

PARAMETERS

npoint: Number of control points.
point: An array of 4-vector (x,y,z,w) control points
nknot: Number of knots.
knot: A nondecreasing sequence of knot locations.

DESCRIPTION

This function creates a non-uniform rational B-spline (NURBS). The rational control points are specified in point and the knot vector is given by knot. Note that the control points are 4-vectors, not 3-vectors as in other geometry routines.

The return value is a tag for this object that may be used to reference it at a later time with cxGeoFocus(3).

Valid attributes are color and transparency. Attribute distribution may be CX_GEO_PER_OBJECT.

NAME

C SPECIFICATION

FORTRAN SPECIFICATION

PARAMETERS

DESCRIPTION

SEE ALSO