/***************************************************/
public static BHG.ICurve FromRhino(this RHG.Curve rCurve)
{
if (rCurve == null)
{
return(null);
}
Type curveType = rCurve.GetType();
if (rCurve.IsLinear() && rCurve.SpanCount < 2)
{
return(new BHG.Line {
Start = rCurve.PointAtStart.FromRhino(), End = rCurve.PointAtEnd.FromRhino(), Infinite = false
});
}
if (rCurve.IsCircle())
{
RHG.Circle circle = new RHG.Circle();
rCurve.TryGetCircle(out circle);
return(circle.FromRhino());
}
else if (rCurve.IsArc() || typeof(RHG.ArcCurve).IsAssignableFrom(curveType))
{
RHG.Arc arc = new RHG.Arc();
rCurve.TryGetArc(out arc);
return(arc.FromRhino());
}
else if (rCurve.IsPolyline() || typeof(RHG.PolylineCurve).IsAssignableFrom(curveType))
{
RHG.Polyline polyline = new RHG.Polyline();
rCurve.TryGetPolyline(out polyline);
return(polyline.FromRhino());
}
else if (rCurve.IsClosed && rCurve.IsEllipse())
{
RHG.Ellipse ellipse = new RHG.Ellipse();
rCurve.TryGetEllipse(out ellipse);
return(ellipse.FromRhino());
}
else if (rCurve is RHG.NurbsCurve)
{
return(((RHG.NurbsCurve)rCurve).FromRhino());
}
else if (rCurve is RHG.PolyCurve)
{
return(((RHG.PolyCurve)rCurve).FromRhino()); //The test of IsPolyline above is very important to make sure we can cast to PolyCurve here
}
else
{
return((rCurve.ToNurbsCurve()).FromRhino());
}
}
protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
Rhino.Input.Custom.GetObject go = new Rhino.Input.Custom.GetObject();
go.SetCommandPrompt("Select curves");
go.GeometryFilter = Rhino.DocObjects.ObjectType.Curve;
go.GetMultiple(1, 0);
if (go.CommandResult() != Result.Success)
{
return(go.CommandResult());
}
for (int i = 0; i < go.ObjectCount; i++)
{
Rhino.Geometry.Curve curve = go.Object(i).Curve();
if (null == curve)
{
return(Result.Failure);
}
if (curve is LineCurve)
{
RhinoApp.WriteLine("Curve {0} is a line.", i);
}
else if (curve is ArcCurve)
{
if (curve.IsClosed)
{
RhinoApp.WriteLine("Curve {0} is a circle.", i);
}
else
{
RhinoApp.WriteLine("Curve {0} is an arc.", i);
}
}
else if (curve is PolylineCurve)
{
RhinoApp.WriteLine("Curve {0} is a polyline.", i);
}
else if (curve is PolyCurve)
{
RhinoApp.WriteLine("Curve {0} is a polycurve.", i);
}
else if (curve is NurbsCurve)
{
if (curve.IsEllipse())
{
if (curve.IsClosed)
{
RhinoApp.WriteLine("Curve {0} is an ellipse.", i);
}
else
{
RhinoApp.WriteLine("Curve {0} is an elliptical arc.", i);
}
}
else
{
RhinoApp.WriteLine("Curve {0} is a NURBS curve.", i);
}
}
else
{
RhinoApp.WriteLine("Curve {0} is an unknown type.", i);
}
}
return(Result.Success);
}