NurbsCurvePointList

NurbsCurvePointList class

Provides access to the control points of a NURBS curve.

Derived Classes:

Namespace: Rhino.Geometry.Collections
NurbsCurvePointList: references

Properties (4)

ControlPolygonLength

Gets the length of the polyline connecting all control points.

Count

Gets the number of control points in this curve.

Item

Gets or sets the control point location at the given index.

PointSize

Returns the control point size, or the number of doubles per control point. For rational curves, PointSize = Curve.Dimension + 1. For non-rational curves, PointSize = Curve.Dimension.

Methods (20)

ChangeEndWeights(double w0, double w1)

Use a combination of scaling and reparameterization to change the end weights to the specified values.

Contains(ControlPoint item)

Determines if this list contains an item.

ControlPolygon()

Constructs a polyline through all the control points. Note that periodic curves generate a closed polyline withfewer points than control-points.

CopyTo(ControlPoint[] array, int arrayIndex)

Copied the list to an array.

EnsurePrivateCopy()

If you want to keep a copy of this class around by holding onto it in a variable after a command completes, call EnsurePrivateCopy to make sure that this class is not tied to the document. You can call this function as many times as you want.

EpsilonEquals(NurbsCurvePointList other, double epsilon)

Check that all values in other are within epsilon of the values in this

GetPoint(int index, out Point3d point)

Gets a world 3-D, or Euclidean, control point at the given index. The 4-D representation is (x, y, z, 1.0).

GetPoint(int index, out Point4d point)

Gets a homogeneous control point at the given index, where the 4-D representation is (x, y, z, w). The world 3-D, or Euclidean, representation is (x/w, y/w, z/w).

GetWeight(int index)

Gets the weight of a control point at the given index. Note, if the curve is non-rational, the weight will be 1.0.

IndexOf(ControlPoint item)

Gets the index of a control point, or -1.

MakeNonRational()

Converts the curve to a Non-rational NURBS curve. Non-rational curves have unweighted control points.

MakeRational()

Converts the curve to a Rational NURBS curve. Rational NURBS curves have weighted control points.

SetPoint(int index, double x, double y, double z, double weight)

Sets a homogeneous control point at the given index, where the 4-D representation is (x, y, z, w). The world 3-D, or Euclidean, representation is (x/w, y/w, z/w).

SetPoint(int index, double x, double y, double z)

Sets a world 3-D, or Euclidean, control point at the given index. The 4-D representation is (x, y, z, 1.0).

SetPoint(int index, Point3d point, double weight)

Sets a world 3-D, or Euclidean, control point and weight at a given index. The 4-D representation is (x*w, y*w, z*w, w).

SetPoint(int index, Point3d point)

Sets a world 3-D, or Euclidean, control point at the given index. The 4-D representation is (x, y, z, 1.0).

SetPoint(int index, Point4d point)

Sets a homogeneous control point at the given index, where the 4-D representation is (x, y, z, w). The world 3-D, or Euclidean, representation is (x/w, y/w, z/w).

SetWeight(int index, double weight)

Sets the weight of a control point at the given index Note, if the curve is non-rational, it will be converted to rational.

UVNDirectionsAt(int index, out Vector3d uDir, out Vector3d vDir, out Vector3d nDir)

Calculates the U, V, and N directions of a NURBS curve control point similar to the method used by Rhino's MoveUVN command.

ValidateSpacing(double closeTolerance, double stackTolerance, out int closeIndices, out int stackedIndices)

Simple check of distance between adjacent control points

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