Curve.CreateFromGeCurve( ) get wrong result, when parameter Curve3d is come from Curve3d.GetSplitCurves ()

[465340553]

English is not my native language and there may be quite a few mistakes，

Thank you for your understanding。

Here's the test code

var per1 = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor.GetEntity("\nPick Polyline");
if (per1.Status != PromptStatus.OK) return;

var ptr = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor.GetPoint("\nPick a Point");
if (ptr.Status != PromptStatus.OK) return;
using (Transaction tr = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.TransactionManager.StartTransaction())
{
    BlockTable bt = (BlockTable)tr.GetObject(Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Database.BlockTableId, OpenMode.ForRead, false);
    BlockTableRecord btr = (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite, false);
    var pl = per1.ObjectId.GetObject(OpenMode.ForRead) as Curve;
    //Geometry Curve3d
    var geoC = pl.GetGeCurve();
    // splited Curve3d
    var scs = geoC.GetSplitCurves(geoC.GetParameterOf(geoC.GetClosestPointTo(ptr.Value).Point));

    foreach (Curve3d subC in scs)
    {
        Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage("\nGeo Curve3d's startpoint and endpoint \t" + subC.StartPoint.ToString() + "\t" + subC.EndPoint.ToString());
        // database Curve
        var dbc = Curve.CreateFromGeCurve(subC);

        Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage("\ndbbase Curve's startpoint and endpoint\t" + dbc.StartPoint.ToString() + "\t" + dbc.EndPoint.ToString());

        btr.AppendEntity(dbc);
        tr.AddNewlyCreatedDBObject(dbc, true);
    }

    tr.Commit();
}

I need split Curve3d into segments，

and then Create database Curve，

when I select a Line or a Arc，

the result is right,

But when I select a ployline,

the result is wrong,

the "sub polyline" is as long as the source polyline。

Who can help test the above code,

Find out where my error is。

Thank you so much！

[hosneyalaa]

HI

LOOK AT reply @_gile   

https://forums.autodesk.com/t5/net/curve-and-curve3d-from-curve3d-to-curve-or-ways-of-drawing-a/m-p/...

[_gile]

Hi,

Why do you convert the selected Curve object into a Curve3d object and then back to curves?

Converting a Polyline into a Curve3d generates a CompositeCurve3d which is a sort of array of Curve3d objects (LineSegment3d and/or CircularArc3d).

The Curve type provides a GetSplitCurves method which you could directly use.

        [CommandMethod("TEST")]
        public static void Test()
        {
            var doc = Application.DocumentManager.MdiActiveDocument;
            var db = doc.Database;
            var ed = doc.Editor;
            var peo = new PromptEntityOptions("\nSelect a curve: ");
            peo.SetRejectMessage("\nSelected object is not a curve.");
            peo.AddAllowedClass(typeof(Curve), false);
            var per = ed.GetEntity(peo);
            if (per.Status != PromptStatus.OK) 
                return;
            var ppr = ed.GetPoint("\nPick a point: ");
            if (ppr.Status != PromptStatus.OK)
                return;
            var point = ppr.Value.TransformBy(ed.CurrentUserCoordinateSystem);
            using (var tr = db.TransactionManager.StartTransaction())
            {
                var curve = (Curve)tr.GetObject(per.ObjectId, OpenMode.ForWrite);
                var points = new Point3dCollection();
                points.Add(curve.GetClosestPointTo(point, false));
                var splitCurves = curve.GetSplitCurves(points);
                var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
                foreach (Entity entity in splitCurves)
                {
                    curSpace.AppendEntity(entity);
                    tr.AddNewlyCreatedDBObject(entity, true);
                }
                curve.Erase();
                tr.Commit();
            }
        }

[465340553]

Thank you for your reply。

The test code is a simplified version，

I need to use the method “Curve3d.GetTrimmedOffset Method (double, Vector3d, OffsetCurveExtensionType)”，

And it needs to be calculated with other elements（BoundedPlane），

So I convert the DatabaseServices.Curve into Geometry.Curve3d.

I know the method “ Curve.GetSplitCurves (Point3dCollection) ”。

When my code runs incorrectly,

I thought it was my fault，

So I wrote the test code to ask for advice。

My current workaround is to use the method “ Curve.GetSplitCurves (Point3dCollection)”。

Thanks！

[465340553 · Accepted solution]

I found a workaround：

Create a new CompositeCurve3d use the Splitted segment，

var newSegment=new CompositeCurve3d(new Curve3d[] { tmp });

the new CompositeCurve3d is the one I needed！

[465340553]

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