Class NurbsCurve

Inheritance
System.Object
BaseCurve
NurbsCurve
Inherited Members
Namespace: Paramdigma.Core.Geometry
Assembly: Paramdigma.Core.dll
Syntax
public class NurbsCurve : BaseCurve

Constructors

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NurbsCurve(List<Point4d>, Int32)

Initializes a new instance of NurbsCurve by it's control points and degree.

Declaration
public NurbsCurve(List<Point4d> controlPoints, int degree)
Parameters
Type Name Description
List<Point4d> controlPoints

The control points to create the curve with.
System.Int32 degree

The desired degree of the curve. Degree cannot be > (ControlPoints - 1)

Fields

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ControlPoints

The control points of the nurbs curve.

Declaration
public List<Point4d> ControlPoints
Field Value
Type Description
List<Point4d>
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Degree

The degree of the curve.

Declaration
public int Degree
Field Value
Type Description
System.Int32
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Knots

The nurbs curve knot vector.

Declaration
public List<double> Knots
Field Value
Type Description
List<System.Double>

Properties

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EndPoint

The end point of the curve.

Declaration
public Point3d EndPoint { get; }
Property Value
Type Description
Point3d
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EndTangent

The tangent vector at the end of the curve.

Declaration
public Vector3d EndTangent { get; }
Property Value
Type Description
Vector3d
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StartPoint

The start point of the curve.

Declaration
public Point3d StartPoint { get; }
Property Value
Type Description
Point3d
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StartTangent

The tangent vector at the start of the curve.

Declaration
public Vector3d StartTangent { get; }
Property Value
Type Description
Vector3d

Methods

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BinormalAt(Double)

Compute a binormal vector along the curve at a specified parameter.

Declaration
public override Vector3d BinormalAt(double t)
Parameters
Type Name Description
System.Double t

Parameter.
Returns
Type Description
Vector3d

Binormal vector at the parameter specified.
Overrides
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CheckValidity()

Checks the validity of the curve.

Declaration
public override bool CheckValidity()
Returns
Type Description
System.Boolean

True if valid.
Overrides
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ComputeLength()

Computes the length of the curve.

Declaration
protected override double ComputeLength()
Returns
Type Description
System.Double

Length as number.
Overrides
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FrameAt(Double)

Compute the perpendicular frame along the curve at a specified parameter.

Declaration
public override Plane FrameAt(double t)
Parameters
Type Name Description
System.Double t

Parameter.
Returns
Type Description
Plane

Perpendicular plane at the parameter specified.
Overrides
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NormalAt(Double)

Compute normal vector along the curve at a specified parameter.

Declaration
public override Vector3d NormalAt(double t)
Parameters
Type Name Description
System.Double t

Parameter.
Returns
Type Description
Vector3d

Normal vector at the parameter specified.
Overrides
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PointAt(Double)

Compute a point along the curve at a specified parameter.

Declaration
public override Point3d PointAt(double t)
Parameters
Type Name Description
System.Double t

Parameter.
Returns
Type Description
Point3d

Point at the parameter specified.
Overrides
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TangentAt(Double)

Compute the tangent vector along the curve at a specified parameter.

Declaration
public override Vector3d TangentAt(double t)
Parameters
Type Name Description
System.Double t

Parameter.
Returns
Type Description
Vector3d

Tangent vector at the parameter specified.
Overrides