topic Re: How to create semi ellipse with two points and radius. in .NET Forum

How to create elliptical arc with two points and center point.

MarkJamesRogolino — Sat, 16 Dec 2023 09:00:35 GMT

Hello, everyone. Now I wanna make a semi/quarter ellipse like following images, Hope to someone help me.

Ellipse should be lied crookedly. And I know 2 points of this ellipse. Thanks in advance.

Re: How to create semi ellipse with two points and radius.

hosneyalaa — Fri, 15 Dec 2023 20:30:21 GMT

Can you attached example drawing

Re: How to create semi ellipse with two points and radius.

MarkJamesRogolino — Sat, 16 Dec 2023 03:45:58 GMT

okay, you can find LEGENDS : table in this drawing.

Re: How to create semi ellipse with two points and radius.

hosneyalaa — Sat, 16 Dec 2023 06:19:43 GMT

@MarkJamesRogolino

SEE THIS

TRY

[CommandMethod("TEST")] public void Test() { var doc = Application.DocumentManager.MdiActiveDocument; var db = doc.Database; using (var tr = db.TransactionManager.StartTransaction()) { var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite); Point3d cen = new Point3d(5156273.51 , -1187659.62 , 0 ); Vector3d nor = Vector3d.ZAxis; Vector3d mAxis = new Vector3d(0.47 , -0.363 , 0); double rRatio = 0.2670; double stAng = -.66253; double enAng = 0.357; Ellipse ellipse = new Ellipse(cen, nor, mAxis, rRatio, stAng, enAng); curSpace.AppendEntity(ellipse); tr.AddNewlyCreatedDBObject(ellipse, true); tr.Commit(); } }

Re: How to create semi ellipse with two points and radius.

MarkJamesRogolino — Sat, 16 Dec 2023 07:23:43 GMT

Thank you for your help. But can you find to make two ends of ellipse coincides to blue mark points?

Re: How to create semi ellipse with two points and radius.

MarkJamesRogolino — Sat, 16 Dec 2023 07:28:20 GMT

I don't know meaning of mAxis(third parameter). Could you tell me ? Thank you again.

Re: How to create semi ellipse with two points and radius.

hosneyalaa — Sat, 16 Dec 2023 12:29:58 GMT

Really I know a lot about ellipse

You can see this

https://help.autodesk.com/view/OARX/2022/ENU/?guid=OARX-ManagedRefGuide-Autodesk_AutoCAD_Geometry_EllipticalArc2d_EllipticalArc2d_Point2d_Vector2d_Vector2d_double_double

It is possible if @_gile has the time to help you and he has sufficient experience