RhinoCommon API
CurveToPolyline Method (Int32, Int32, Double, Double, Double, Double, Double, Double, Boolean, Interval) |
Gets a polyline approximation of a curve.
Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll)

public PolylineCurve ToPolyline( int mainSegmentCount, int subSegmentCount, double maxAngleRadians, double maxChordLengthRatio, double maxAspectRatio, double tolerance, double minEdgeLength, double maxEdgeLength, bool keepStartPoint, Interval curveDomain )
Public Function ToPolyline ( mainSegmentCount As Integer, subSegmentCount As Integer, maxAngleRadians As Double, maxChordLengthRatio As Double, maxAspectRatio As Double, tolerance As Double, minEdgeLength As Double, maxEdgeLength As Double, keepStartPoint As Boolean, curveDomain As Interval ) As PolylineCurve
Parameters
- mainSegmentCount
- Type: SystemInt32
If mainSegmentCount <= 0, then both subSegmentCount and mainSegmentCount are ignored. If mainSegmentCount > 0, then subSegmentCount must be >= 1. In this case the nurb will be broken into mainSegmentCount equally spaced chords. If needed, each of these chords can be split into as many subSegmentCount sub-parts if the subdivision is necessary for the mesh to meet the other meshing constraints. In particular, if subSegmentCount = 0, then the curve is broken into mainSegmentCount pieces and no further testing is performed. - subSegmentCount
- Type: SystemInt32
An amount of subsegments. - maxAngleRadians
- Type: SystemDouble
( 0 to pi ) Maximum angle (in radians) between unit tangents at adjacent vertices. - maxChordLengthRatio
- Type: SystemDouble
Maximum permitted value of (distance chord midpoint to curve) / (length of chord). - maxAspectRatio
- Type: SystemDouble
If maxAspectRatio < 1.0, the parameter is ignored. If 1 <= maxAspectRatio < sqrt(2), it is treated as if maxAspectRatio = sqrt(2). This parameter controls the maximum permitted value of (length of longest chord) / (length of shortest chord). - tolerance
- Type: SystemDouble
If tolerance = 0, the parameter is ignored. This parameter controls the maximum permitted value of the distance from the curve to the polyline. - minEdgeLength
- Type: SystemDouble
The minimum permitted edge length. - maxEdgeLength
- Type: SystemDouble
If maxEdgeLength = 0, the parameter is ignored. This parameter controls the maximum permitted edge length. - keepStartPoint
- Type: SystemBoolean
If true the starting point of the curve is added to the polyline. If false the starting point of the curve is not added to the polyline. - curveDomain
- Type: Rhino.GeometryInterval
This subdomain of the NURBS curve is approximated.
Return Value
Type: PolylineCurvePolylineCurve on success, null on error.

Rhino for Mac
Supported in: 5.4Rhino for Windows
Supported in: 6.14