Gets parameter on the arc closest to a test point.

Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll) Version: Rhino 6.0

C#

public double ClosestParameter(
	Point3d testPoint
)

VB

Public Function ClosestParameter ( 
	testPoint As Point3d
) As Double

testPoint

Type: Rhino.Geometry.Point3d
Point to get close to.

Type: Double
Parameter (in radians) of the point on the arc that is closest to the test point. If testPoint is the center of the arc, then the starting point of the arc is (arc.Domain()[0]) returned. If no parameter could be found, RhinoMath.UnsetValue is returned.

Supported in: 6.0.16224.21491, 5D58w

Arc Structure
Rhino.Geometry Namespace