topic Re: Can't find intersections. in .NET Forum

Can't find intersections.

932189886 — Wed, 09 Aug 2023 09:26:02 GMT

I can't get the intersections in the graph, anything else of the same type is fine.I don't know if this is a bug or if there is something wrong with my code. Please help me find out what the problem is. the code is simple :

Point3dCollection intersections = new Point3dCollection();

var plane = new Plane();

curve1.IntersectWith(curve2, Intersect.OnBothOperands,plane, intersections, IntPtr.Zero, IntPtr.Zero);

Re: Can't find intersections.

kerry_w_brown — Wed, 09 Aug 2023 09:47:34 GMT

I assume you're getting an error message ??

Where do you define the Plane parameters ??

It's better if you post a small self contained method to save your peers having to guess.

Regards,

Re: Can't find intersections.

_gile — Wed, 09 Aug 2023 10:06:00 GMT

Hi,

It works for me with your drawing.

Testing command:

[CommandMethod("INT")] public static void Int() { var doc = Application.DocumentManager.MdiActiveDocument; var db = doc.Database; var ed = doc.Editor; var peo = new PromptEntityOptions("\nSelect curve 1: "); 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 id1 = per.ObjectId; peo.Message = "\nSelect curve 2: "; per = ed.GetEntity(peo); if (per.Status != PromptStatus.OK) return; var id2 = per.ObjectId; using (var tr = db.TransactionManager.StartTransaction()) { var points = new Point3dCollection(); var plane = new Plane(); var curve1 = (Entity)tr.GetObject(id1, OpenMode.ForRead); var curve2 = (Entity)tr.GetObject(id2, OpenMode.ForRead); curve1.IntersectWith(curve2, Intersect.OnBothOperands, plane, points, IntPtr.Zero, IntPtr.Zero); if (0 < points.Count) { var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite); foreach (Point3d pt in points) { var dbPoint = new DBPoint(pt); curSpace.AppendEntity(dbPoint); tr.AddNewlyCreatedDBObject(dbPoint, true); } } else { ed.WriteMessage("\nNone intersection."); } tr.Commit(); } }

Re: Can't find intersections.

_gile — Wed, 09 Aug 2023 10:08:01 GMT

Hi Kerry,

@kerry_w_brown a écrit :

Where do you define the Plane parameters ??

The default ctor: new plane() uses the default values: Point3d.Origin and Vector3d.ZAxis.

Re: Can't find intersections.

932189886 — Wed, 09 Aug 2023 10:15:00 GMT

THK U.I TEST YOUR CODE,BUT STILL NONE.I'M USING ACAD2016.

Re: Can't find intersections.

kerry_w_brown — Wed, 09 Aug 2023 10:19:56 GMT

happenstance ?
default is :

Normal : {(0,0,1)}

PointOnPlane : Y = 0, X = 0

🙂

added: Gilles beat me 🙂