public static Edge ToTopologic(this global::Rhino.Geometry.NurbsCurve nurbsCurve)
{
if (nurbsCurve == null)
{
return(null);
}
int degree = nurbsCurve.Degree;
bool isPeriodic = nurbsCurve.IsPeriodic;
bool isRational = nurbsCurve.IsRational;
List <double> knots = nurbsCurve.Knots.ToList();
knots.Insert(0, knots[0]);
knots.Add(knots.Last());
NurbsCurvePointList ghControlPoints = nurbsCurve.Points;
List <Vertex> controlPoints = new List <Vertex>();
List <double> weights = new List <double>();
for (int i = 0; i < ghControlPoints.Count; ++i)
{
controlPoints.Add(ghControlPoints[i].Location.ToTopologic());
weights.Add(ghControlPoints[i].Weight);
}
return(Edge.ByNurbsParameters(controlPoints, weights, knots, isRational, isPeriodic, degree));
}
public static Edge ToTopologic(this BrepEdge brepEdge)
{
if (brepEdge == null)
{
return(null);
}
global::Rhino.Geometry.NurbsCurve nurbsCurve = brepEdge.ToNurbsCurve();
return(ToTopologic(nurbsCurve));
}
public static Edge ToTopologic(this ArcCurve arcCurve)
{
if (arcCurve == null)
{
return(null);
}
global::Rhino.Geometry.NurbsCurve nurbsCurve = arcCurve.ToNurbsCurve();
return(ToTopologic(nurbsCurve));
}
public static Topology ToTopologic(this Curve curve)
{
if (curve == null)
{
return(null);
}
LineCurve lineCurve = curve as LineCurve;
if (lineCurve != null)
{
return(lineCurve.Line.ToTopologic());
}
global::Rhino.Geometry.NurbsCurve nurbsCurve = curve as global::Rhino.Geometry.NurbsCurve;
if (nurbsCurve != null)
{
return(nurbsCurve.ToTopologic());
}
ArcCurve arcCurve = curve as ArcCurve;
if (arcCurve != null)
{
return(arcCurve.ToTopologic());
}
BrepEdge brepEdge = curve as BrepEdge;
if (brepEdge != null)
{
return(brepEdge.ToTopologic());
}
PolylineCurve ghPolylineCurve = curve as PolylineCurve;
if (ghPolylineCurve != null)
{
return(ghPolylineCurve.ToTopologic());
}
PolyCurve ghPolyCurve = curve as PolyCurve;
if (ghPolyCurve != null)
{
return(ghPolyCurve.ToTopologic());
}
return(null);
}
public static Curve ToRhino(this global::Topologic.NurbsCurve nurbsCurve)
{
// Based on https://developer.rhino3d.com/api/RhinoCommon/html/P_Rhino_Geometry_NurbsCurve_Knots.htm
bool isRational = nurbsCurve.IsRational;
int degree = nurbsCurve.Degree;
List <Vertex> controlVertices = nurbsCurve.ControlVertices;
List <Point3d> ghControlPoints = new List <Point3d>();
global::Rhino.Geometry.NurbsCurve ghNurbsCurve = new global::Rhino.Geometry.NurbsCurve(3, isRational, degree + 1, controlVertices.Count);
int i = 0;
foreach (Vertex controlVertex in controlVertices)
{
Point3d ghControlPoint = ToRhino(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;
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.");
}
