private Rhino.Geometry.Curve ToNurbsCurve(Topologic.NurbsCurve nurbsCurve)
{
// Based on https://developer.rhino3d.com/api/RhinoCommon/html/P_Rhino_Geometry_NurbsCurve_Knots.htm
bool isPeriodic = nurbsCurve.IsPeriodic;
bool isRational = nurbsCurve.IsRational;
int degree = nurbsCurve.Degree;
List <Topologic.Vertex> controlVertices = nurbsCurve.ControlVertices;
List <Point3d> ghControlPoints = new List <Point3d>();
Rhino.Geometry.NurbsCurve ghNurbsCurve = new Rhino.Geometry.NurbsCurve(3, isRational, degree + 1, controlVertices.Count);
int i = 0;
foreach (Topologic.Vertex controlVertex in controlVertices)
{
Point3d ghControlPoint = ToPoint(controlVertex);
ghControlPoints.Add(ghControlPoint);
ghNurbsCurve.Points.SetPoint(i, ghControlPoint);
++i;
}
List <double> knots = nurbsCurve.Knots;
knots = knots.GetRange(1, knots.Count - 2);
i = 0;
foreach (double knot in knots)
{
ghNurbsCurve.Knots[i] = knot;
++i;
}
double t0 = nurbsCurve.FirstParameter;
double t1 = nurbsCurve.LastParameter;
Rhino.Geometry.Curve ghTrimmedNurbsCurve = ghNurbsCurve.Trim(t0, t1);
String log = "";
if (ghTrimmedNurbsCurve.IsValidWithLog(out log))
{
return(ghTrimmedNurbsCurve);
}
throw new Exception("A valid curve cannot be created from this Edge.");
}
