/// <summary>
/// Create Edge (Line) from Dynamo NurbsCurve.
/// </summary>
public static Geometry.Edge FromDynamoLinearNurbsCurve(Autodesk.DesignScript.Geometry.NurbsCurve obj)
{
FdPoint3d startPoint = FdPoint3d.FromDynamo(obj.StartPoint);
FdPoint3d endPoint = FdPoint3d.FromDynamo(obj.EndPoint);
// lcs
FdCoordinateSystem cs = FdCoordinateSystem.FromDynamoCurve(obj);
// return
return(new Geometry.Edge(startPoint, endPoint, cs));
}
/// <summary>
/// Create Edge (Line or Circle or Arc) from Dynamo NurbsCurve.
/// </summary>
public static Geometry.Edge FromDynamoNurbsCurve(Autodesk.DesignScript.Geometry.NurbsCurve obj)
{
// points on curve
Autodesk.DesignScript.Geometry.Point startPoint, midPoint, endPoint;
startPoint = obj.StartPoint;
midPoint = obj.PointAtParameter(0.5);
endPoint = obj.EndPoint;
// distances to compare with curve length.
double dist0 = Autodesk.DesignScript.Geometry.Vector.ByTwoPoints(startPoint, endPoint).Length;
double dist1 = Autodesk.DesignScript.Geometry.Vector.ByTwoPoints(startPoint, midPoint).Length;
// check if NurbsCurve is a Line
if (Math.Abs(dist0 - obj.Length) < Tolerance.LengthComparison)
{
return(Edge.FromDynamoLinearNurbsCurve(obj));
}
// check if NurbsCurve is a Circle
else if (obj.IsClosed && Math.Abs(dist1 * Math.PI - obj.Length) < Tolerance.LengthComparison)
{
Autodesk.DesignScript.Geometry.Point p0, p1, p2;
p0 = obj.PointAtParameter(0);
p1 = obj.PointAtParameter(0.333);
p2 = obj.PointAtParameter(0.667);
Autodesk.DesignScript.Geometry.Circle circle = Autodesk.DesignScript.Geometry.Circle.ByThreePoints(p0, p1, p2);
return(Edge.FromDynamoCircle(circle));
}
// if NurbsCurve is not a Line or a Circle.
else
{
// See if it can be cast to an Arc by three points
try
{
Autodesk.DesignScript.Geometry.Arc arc = Autodesk.DesignScript.Geometry.Arc.ByThreePoints(startPoint, midPoint, endPoint);
return(Edge.FromDynamoArc1(arc));
}
// If casting was not successful the NurbsCurve is not a Line, a Circle or an Arc
catch
{
throw new System.ArgumentException("NurbsCurve is not a Line, a Circle or an Arc. Unable to convert NurbsCurve to an Edge.");
}
}
}
