topic Re: Draw circle in the XY plane. in .NET Forum

Draw circle in the XY plane.

Aravinth.Pichamani — Tue, 12 Nov 2024 05:41:04 GMT

Re: Draw circle in the XY plane.

prem_kumar8SXZJ — Tue, 12 Nov 2024 06:26:05 GMT

Hi @Aravinth.Pichamani, Please provide more details on what you are trying to achieve then only we can help you with the problem.

Re: Draw circle in the XY plane.

essam-salah — Tue, 12 Nov 2024 07:20:19 GMT

hi @Aravinth.Pichamani

var center = new Autodesk.AutoCAD.Geometry.Point3d(3, 5, 5); var normal_XY_Plane = Autodesk.AutoCAD.Geometry.Vector3d.ZAxis; var normal_custom = new Autodesk.AutoCAD.Geometry.Vector3d(3, 4, 5); var radius = 10d; var circle = new Autodesk.AutoCAD.DatabaseServices.Circle(center, normal_XY_Plane, radius);

Re: Draw circle in the XY plane.

Aravinth.Pichamani — Tue, 12 Nov 2024 07:55:31 GMT

i need to draw a circle with new UCS

Re: Draw circle in the XY plane.

essam-salah — Tue, 12 Nov 2024 08:03:14 GMT

hi@Aravinth.Pichamani

have u tried any thing and failed, what is your problem exactly, the below pic shows the the vector v nad c1, c2 as line start/end points

Re: Draw circle in the XY plane.

Aravinth.Pichamani — Tue, 12 Nov 2024 08:05:01 GMT

Re: Draw circle in the XY plane.

Aravinth.Pichamani — Tue, 12 Nov 2024 08:06:19 GMT

Re: Draw circle in the XY plane.

cuongtk2 — Tue, 12 Nov 2024 08:13:43 GMT

The normal vector of a plane is a vector that is perpendicular to the plane and is commonly used to represent the orientation of the plane in three-dimensional space.
var circle = new Autodesk.AutoCAD.DatabaseServices.Circle(center, normal_custom, radius);

Re: Draw circle in the XY plane.

Aravinth.Pichamani — Tue, 12 Nov 2024 08:26:29 GMT

Re: Draw circle in the XY plane.

Aravinth.Pichamani — Tue, 12 Nov 2024 08:38:39 GMT

pls guide me

Re: Draw circle in the XY plane.

essam-salah — Tue, 12 Nov 2024 08:46:30 GMT

@Aravinth.Pichamani

if the input is the Line (center line) why we do transformation?, just the vector of the CL and a point lies on that line,

and u can use editor.CurrentUserCoordinateSystem to get current user coord system.

anyway if u can provide us with the dwg file and draw the input in a specific layer and the output u want in another layer it might help

Re: Draw circle in the XY plane.

Aravinth.Pichamani — Tue, 12 Nov 2024 09:22:22 GMT

Re: Draw circle in the XY plane.

essam-salah — Tue, 12 Nov 2024 10:21:08 GMT

hi @Aravinth.Pichamani

here is what i understood, and the way it worked for me:

using cDB = Autodesk.Civil.DatabaseServices; using P3D = Autodesk.AutoCAD.Geometry.Point3d; using aApp = Autodesk.AutoCAD.ApplicationServices; ... // get current doc and db var aDoc = aApp.Application.DocumentManager.MdiActiveDocument; var db = aDoc.Database; var ed = aDoc.Editor; // main start/end points (center line) var p1 = new P3D(5, 5, 5); // random point var p2 = new P3D(30, 25, 8); // random point // distances on main line double d1 = 10d, d2 = 20d; // for points m1, m2 // transaction using (var tr = db.TransactionManager.StartTransaction()) { // get current model space var bt = tr.GetObject(db.BlockTableId, aDB.OpenMode.ForWrite) as aDB.BlockTable; var btr = tr.GetObject(bt[aDB.BlockTableRecord.ModelSpace], aDB.OpenMode.ForWrite) as aDB.BlockTableRecord; // draw main line (CL): var cl = new aDB.Line(p1, p2); // main line vector: var v = p1.GetVectorTo(p2).GetNormal(); // calc any point at CL (m1, m2): var v1 = v * d1; var v2 = v * d2; var m1 = new P3D(p1.X + v1.X, p1.Y + v1.Y, p1.Z + v2.Z); var m2 = new P3D(p1.X + v2.X, p1.Y + v2.Y, p1.Z + v2.Z); // draw circles var circle_1 = new aDB.Circle(p1, v, radius: 10); var circle_2 = new aDB.Circle(m1, v, radius: 12); var circle_3 = new aDB.Circle(m2, v, radius: 14); // add to current drawings btr.AppendEntity(cl); btr.AppendEntity(circle_1); btr.AppendEntity(circle_2); btr.AppendEntity(circle_3); tr.AddNewlyCreatedDBObject(cl, true); tr.AddNewlyCreatedDBObject(circle_1, true); tr.AddNewlyCreatedDBObject(circle_2, true); tr.AddNewlyCreatedDBObject(circle_3, true); // apply changes tr.Commit(); }

Re: Draw circle in the XY plane.

_gile — Wed, 13 Nov 2024 07:20:14 GMT

Hi,

Here's an example you can use as inspiration.

[CommandMethod("DRAW3DCIRCLE")] public static void Draw3dCircle() { var doc = Application.DocumentManager.MdiActiveDocument; var db = doc.Database; var ed = doc.Editor; // Prompt the user for the circle center var ppo = new PromptPointOptions("\nSpecify the circle center: "); var ppr = ed.GetPoint(ppo); if (ppr.Status != PromptStatus.OK) return; var center = ppr.Value; // Prompt the user for a point in the circle normal direction ppo.Message = "\nSpecify a point in the circle normal direction: "; ppo.BasePoint = center; ppo.UseBasePoint = true; ppr = ed.GetPoint(ppo); if (ppr.Status != PromptStatus.OK) return; var normal = center.GetVectorTo(ppr.Value); // Prompt the user for the circle radius var pdo = new PromptDistanceOptions("\nSpecify the circle radius: "); pdo.BasePoint = center; pdo.UseBasePoint = true; var pdr = ed.GetDistance(pdo); if (pdr.Status != PromptStatus.OK) return; double radius = pdr.Value; using (var tr = db.TransactionManager.StartTransaction()) { // Create a Circle instance from the user inputs // Both center and normal have to be transformed from current UCS to WCS var circle = new Circle( center.TransformBy(ed.CurrentUserCoordinateSystem), normal.TransformBy(ed.CurrentUserCoordinateSystem), radius); // Add the circle to the current space var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite); curSpace.AppendEntity(circle); tr.AddNewlyCreatedDBObject(circle, true); tr.Commit(); } }

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Re: Draw circle in the XY plane.

essam-salah — Wed, 13 Nov 2024 07:06:44 GMT

hi @Aravinth.Pichamani

have your problem solved?

Re: Draw circle in the XY plane.

_gile — Wed, 13 Nov 2024 11:11:20 GMT

If you want to honor the current UCS as the CIRCLE native command does, you can simply transform the newly created circle with the Editor.CurrentCoordinateSystem matrix.

[CommandMethod("DRAWCIRCLEINUCS")] public static void DrawCircleInUCS() { var doc = Application.DocumentManager.MdiActiveDocument; var db = doc.Database; var ed = doc.Editor; // Prompt the user for the circle center var ppo = new PromptPointOptions("\nSpecify the circle center: "); var ppr = ed.GetPoint(ppo); if (ppr.Status != PromptStatus.OK) return; var center = ppr.Value; // Prompt the user for the circle radius var pdo = new PromptDistanceOptions("\nSpecify the circle radius: "); pdo.BasePoint = center; pdo.UseBasePoint = true; var pdr = ed.GetDistance(pdo); if (pdr.Status != PromptStatus.OK) return; double radius = pdr.Value; using (var tr = db.TransactionManager.StartTransaction()) { // Create a Circle instance from the user inputs var circle = new Circle(center, Vector3d.ZAxis, radius); // Transform the circle froim WCS to UCS circle.TransformBy(ed.CurrentUserCoordinateSystem); // Add the circle to the current space var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite); curSpace.AppendEntity(circle); tr.AddNewlyCreatedDBObject(circle, true); tr.Commit(); } }

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Re: Draw circle in the XY plane.

Aravinth.Pichamani — Thu, 14 Nov 2024 05:13:11 GMT

(view in My Videos)