NurbSurface(Int32, Int32, Boolean, Int32, Int32, Point3dCollection, DoubleCollection, KnotCollection, KnotCollection) Constructor

Constructor for the NurbSurface class. Creates a NURBS surface with the provided data.

Namespace: Teigha.DatabaseServices
Assembly: TD_Mgd (in TD_Mgd.dll) Version: 24.2.0.0

Syntax

public NurbSurface(
        int uDegree,
        int vDegree,
        bool rational,
        int uNumControlPoints,
        int vNumControlPoints,
        Point3dCollection ctrlPts,
        DoubleCollection weights,
        KnotCollection uKnots,
        KnotCollection vKnots
)

Public Sub New ( 
        uDegree As Integer,
        vDegree As Integer,
        rational As Boolean,
        uNumControlPoints As Integer,
        vNumControlPoints As Integer,
        ctrlPts As Point3dCollection,
        weights As DoubleCollection,
        uKnots As KnotCollection,
        vKnots As KnotCollection
)

public:
NurbSurface(
        int uDegree, 
        int vDegree, 
        bool rational, 
        int uNumControlPoints, 
        int vNumControlPoints, 
        Point3dCollection^ ctrlPts, 
        DoubleCollection^ weights, 
        KnotCollection^ uKnots, 
        KnotCollection^ vKnots
)

new : 
        uDegree : int * 
        vDegree : int * 
        rational : bool * 
        uNumControlPoints : int * 
        vNumControlPoints : int * 
        ctrlPts : Point3dCollection * 
        weights : DoubleCollection * 
        uKnots : KnotCollection * 
        vKnots : KnotCollection -> NurbSurface

Parameters

uDegree Int32: [in] Degree in the u-direction.
vDegree Int32: [in] Degree in the v-direction.
rational Boolean: [in] Determines whether the surface is rational.
uNumControlPoints Int32: [in] Number of control points in the u-direction.
vNumControlPoints Int32: [in] Number of control points in the v-direction.
ctrlPts Point3dCollection: [in] Array of 3D control points.
weights DoubleCollection: [in] Array of weights.
uKnots KnotCollection: [in] Knot vector in the u-direction.
vKnots KnotCollection: [in] Knot vector in the v-direction.

Remarks

The column indexes are for the v-direction, and row indexes are for the u-direction. For example, if the surface has n control points in the u direction and m control points in the v direction, the array looks like [0,0], [0,1], ...[0,n-1], ..., [m-1,0], [m-1,1], ...[m-1,n-1]. If the surface is rational, the weights array must contain the same number of entries as in the array of control points. All weight values must be greater than 0.0. The values in the arrays of weights and control points must have the same sequential order as the control points array. If the surface is not rational, the weight array must be empty. If the surface is not periodic in the u-direction, the size of the uKnots vector must be equal to uNumControlPoints + uDegree + 1. If the surface is periodic in the u-direction, the size of the uKnots vector must be uNumControlPoints + 1. Similarly, if the surface is not periodic in the v-direction, the size of the vKnots vector must be equal to vNumControlPoints + vDegree + 1. If the surface is periodic in the v-direction, the size of the vKnots vector must be vNumControlPoints + 1. Each knot must have a value greater than or equal to the value of its predecessor in the array. If any of the passed-in parameters are not valid, the surface is not created.

Reference

NurbSurface Class

NurbSurface Overload

Teigha.DatabaseServices Namespace