Shrlalgo.RvKits/ShrlAlgoToolkit.RevitAddins/Modeling/CADCurveToModelCurveCmd.cs

using System;

using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit.UI.Selection;

using Nice3point.Revit.Toolkit.External;

namespace ShrlAlgoToolkit.RevitAddins.Modeling;
[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
public class CADCurveToModelCurveCmd : ExternalCommand
{
    public override void Execute()
    {
      
        #region SelectExecute

        using (Transaction trans = new Transaction(Document, "default"))
        {
            try
            {
                Reference refer = UiDocument.Selection.PickObject(ObjectType.Element, "请选择CAD");
                Element e = UiDocument.Document.GetElement(refer);
                if (e is ImportInstance ins)
                {
                    trans.Start();
                    var cadGeo = e.GetGeometryObjects().FirstOrDefault();
                    List<GeometryObject> curves = [];
                    if (cadGeo is GeometryInstance geometryInstance)
                    {
                        curves = [.. geometryInstance.GetInstanceGeometry()];
                    }
                    foreach (var c in curves)
                    {

                        if (c is NurbSpline nurb)
                        {
                            if (nurb.Length > 100 / 304.8)
                            {
                                var points = nurb.Tessellate();
                                ReferencePointArray array = new ReferencePointArray();
                                foreach (var p in points)
                                {
                                    var rp = Document.FamilyCreate.NewReferencePoint(p);
                                    array.Append(rp);
                                }
                                var curveBypoints = Document.FamilyCreate.NewCurveByPoints(array);
                            }
                        }
                        if (c is PolyLine poly)
                        {
                            ReferencePointArray array = new ReferencePointArray();

                            for (int i = 0; i < poly.NumberOfCoordinates - 1; i++)
                            {
                                var p = poly.GetCoordinate(i);
                                //Line.CreateBound(p, poly.GetCoordinate(i + 1));
                            }
                        }
                        if (c is Line l)
                        {

                        }
                    }
                    trans.Commit();
                }

            }
            catch (Autodesk.Revit.Exceptions.OperationCanceledException ex)
            {
                if (trans.GetStatus() == TransactionStatus.Started)
                {
                    trans.Commit();
                }
            }
            catch (Exception ex)
            {
                ErrorMessage = ex.Message;
                if (trans.GetStatus() == TransactionStatus.Started)
                {
                    trans.RollBack();
                }
            }
        }

        #endregion SelectExecute
    }
}