NurbsSurfaceDataCreate Method

public static NurbsSurfaceData Create(
	int degreeU,
	int degreeV,
	IList<double> knotsU,
	IList<double> knotsV,
	IList<XYZ> controlPoints,
	IList<double> weights,
	bool bReverseOrientation
)

Public Shared Function Create ( 
	degreeU As Integer,
	degreeV As Integer,
	knotsU As IList(Of Double),
	knotsV As IList(Of Double),
	controlPoints As IList(Of XYZ),
	weights As IList(Of Double),
	bReverseOrientation As Boolean
) As NurbsSurfaceData

public:
static NurbsSurfaceData^ Create(
	int degreeU, 
	int degreeV, 
	IList<double>^ knotsU, 
	IList<double>^ knotsV, 
	IList<XYZ^>^ controlPoints, 
	IList<double>^ weights, 
	bool bReverseOrientation
)

static member Create : 
        degreeU : int * 
        degreeV : int * 
        knotsU : IList<float> * 
        knotsV : IList<float> * 
        controlPoints : IList<XYZ> * 
        weights : IList<float> * 
        bReverseOrientation : bool -> NurbsSurfaceData 

Parameters

degreeU  Int32

The degree of the spline in the u-direction; must be positive.

degreeV  Int32

The degree of the spline in the v-direction; must be positive.

knotsU  IListDouble

Knot values in the u-direction. The number of knots in the u-direction must be at least 2 * (degreeU + 1).

knotsV  IListDouble

Knot values in the v-direction. The number of knots in the v-direction must be at least 2 * (degreeV + 1).

controlPoints  IListXYZ

One dimensional array of points representing the two dimensional net of control points of the NURBS surface in u and v directions.

The total number of control points must equal numControlPtsU times numControlPtsV, where numControlPtsU and numControlPtsV are the numbers of control points in u and v directions, and they must satisfy the following conditions:

• numControlPtsU = number of knots in u - degreeU - 1.
• numControlPtsV = number of knots in v - degreeV - 1.

The convention for 2d (idxU, idxV) to 1d (idx) conversion of array indexes: idxV first. That is, idxU is outer loop and idxV is inner loop. In other words, idx = idxU * numControlPtsV + idxV.

weights  IListDouble

Array of weights assigned to the control points. The number of weights must equal the number of control points. All weights should be greater than zero.

bReverseOrientation  Boolean

If true, the surface's orientation is opposite to the canonical parametric orientation, otherwise it is the same. The canonical parametric orientation is a counter-clockwise sense of rotation in the uv-parameter plane. Extrinsically, the oriented normal vector for the canonical parametric orientation points in the direction of the cross product dS/du x dS/dv, which S(u, v) is the parameterized surface.

Return Value

Reference