NurbCurve2d(Int32, KnotCollection, Point2dCollection, Boolean) Constructor

Constructor for the NurbCurve2d class. Constructs a 2D curve according to the passed parameters.

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

Syntax

public NurbCurve2d(
        int degree,
        KnotCollection knots,
        Point2dCollection controlPoints,
        bool periodic
)

Public Sub New ( 
        degree As Integer,
        knots As KnotCollection,
        controlPoints As Point2dCollection,
        periodic As Boolean
)

public:
NurbCurve2d(
        int degree, 
        KnotCollection^ knots, 
        Point2dCollection^ controlPoints, 
        bool periodic
)

new : 
        degree : int * 
        knots : KnotCollection * 
        controlPoints : Point2dCollection * 
        periodic : bool -> NurbCurve2d

Parameters

degree Int32: [in] Curve degree.
knots KnotCollection: [in] Knot collection.
controlPoints Point2dCollection: [in] Collection of control points.
periodic Boolean: [in] Flag that specifies whether to make the curve periodic (a closed curve).

Remarks

High degree values make the curve more flexible. For example, degree of 1 is used to define a segment, degree of 2 is used to define a NURBS circle, etc. A knot vector defines a sequence of parameter values that determines where and how the control points affect the curve. The knot vector is a sequence of parameter values and divides the parametric space into intervals, usually called knot spans. Values of the knot vector must be provided in ascending order, for example: (0, 0, 0, 1, 2, 3, 3, 3) can be valid while (0, 0, 2, 0, 3, 1, 3, 3) is not valid. The control points specify the placement of the curve and adjust its shape. The quantity of control points must be at least the degree + 1. If isPeriodic is false, knots.length() must equal controlPoints.length() + degree + 1. If isPeriodic is true, knots.length() must equal controlPoints.length(), and the first and last controlPoints must be equal.

Reference

NurbCurve2d Class

NurbCurve2d Overload

Teigha.Geometry Namespace