NurbsCurve

NurbsCurve class

NURBS curve is a curve represented by NURBS(Non-uniform rational basis spline), A NURBS curve is defined by its Order, a set of weighted ControlPoints and a KnotVectors The w component in control point is used as control point’s weight, whatever it is a TwoDimensional or ThreeDimensional

public class NurbsCurve : Curve

Constructors

Name Description
NurbsCurve() Initializes a new instance of the NurbsCurve class.
NurbsCurve(string) Initializes a new instance of the NurbsCurve class.

Properties

Name Description
Color { get; set; } Gets or sets the color of the line, default value is white(1, 1, 1)
ControlPoints { get; } Gets all control points
CurveType { get; set; } Gets or sets the type of the curve.
Dimension { get; set; } Gets or sets the curve’s dimension.
Excluded { get; set; } Gets or sets whether to exclude this entity during exporting.
KnotVectors { get; } Gets the knot vector, it is a sequence of parameter values that determines where and how the control points affect the NURBS curve.
Multiplicity { get; } Gets the multiplicity.
virtual Name { get; set; } Gets or sets the name.
Order { get; set; } Gets or sets the order of a NURBS curve, it defines the number of nearby control points that influence any given point on the curve.
ParentNode { get; set; } Gets or sets the first parent node, if set the first parent node, this entity will be detached from other parent nodes.
ParentNodes { get; } Gets all parent nodes, an entity can be attached to multiple parent nodes for geometry instancing
Properties { get; } Gets the collection of all properties.
Rational { get; set; } Gets or sets whether it is rational, this value indicates whether this NurbsCurve is rational spline or non-rational spline. Non-rational B-spline is a special case of rational B-splines.
Scene { get; } Gets the scene that this object belongs to

Methods

Name Description
Evaluate(int) Evaluate the NURBS curve
EvaluateAt(double) Evaluate the curve’s point at specified position
FindProperty(string) Finds the property. It can be a dynamic property (Created by CreateDynamicProperty/SetProperty) or native property(Identified by its name)
GetBoundingBox() Gets the bounding box of current entity in its object space coordinate system.
override GetEntityRendererKey() Gets the key of the entity renderer registered in the renderer
GetProperty(string) Get the value of specified property
RemoveProperty(Property) Removes a dynamic property.
RemoveProperty(string) Remove the specified property identified by name
SetProperty(string, object) Sets the value of specified property

See Also