Create a Circle Object (.NET)

This example creates a circle in Model space with a center point of (2,3,0) and a radius of 4.25.

C#

using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
 
[CommandMethod("AddCircle")]
public static void AddCircle()
{
    // Get the current document and database
    Document acDoc = Application.DocumentManager.MdiActiveDocument;
    Database acCurDb = acDoc.Database;

    // Start a transaction
    using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
    {
        // Open the Block table for read
        BlockTable acBlkTbl;
        acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
                                     OpenMode.ForRead) as BlockTable;

        // Open the Block table record Model space for write
        BlockTableRecord acBlkTblRec;
        acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace],
                                        OpenMode.ForWrite) as BlockTableRecord;

        // Create a circle that is at 2,3 with a radius of 4.25
        using (Circle acCirc = new Circle())
        {
            acCirc.Center = new Point3d(2, 3, 0);
            acCirc.Radius = 4.25;

            // Add the new object to the block table record and the transaction
            acBlkTblRec.AppendEntity(acCirc);
            acTrans.AddNewlyCreatedDBObject(acCirc, true);
        }

        // Save the new object to the database
        acTrans.Commit();
    }
}

VB.NET

Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.Geometry
 
<CommandMethod("AddCircle")> _
Public Sub AddCircle()
    '' Get the current document and database
    Dim acDoc As Document = Application.DocumentManager.MdiActiveDocument
    Dim acCurDb As Database = acDoc.Database

    '' Start a transaction
    Using acTrans As Transaction = acCurDb.TransactionManager.StartTransaction()

        '' Open the Block table for read
        Dim acBlkTbl As BlockTable
        acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, OpenMode.ForRead)

        '' Open the Block table record Model space for write
        Dim acBlkTblRec As BlockTableRecord
        acBlkTblRec = acTrans.GetObject(acBlkTbl(BlockTableRecord.ModelSpace), _
                                        OpenMode.ForWrite)

        '' Create a circle that is at 2,3 with a radius of 4.25
        Using acCirc As Circle = New Circle()
            acCirc.Center = New Point3d(2, 3, 0)
            acCirc.Radius = 4.25

            '' Add the new object to the block table record and the transaction
            acBlkTblRec.AppendEntity(acCirc)
            acTrans.AddNewlyCreatedDBObject(acCirc, True)
        End Using

        '' Save the new object to the database
        acTrans.Commit()
    End Using
End Sub

VBA/ActiveX Code Reference

Sub AddCircle()
    ' Define the center point
    Dim ptCen(0 To 2) As Double
    ptCen(0) = 2: ptCen(1) = 3: ptCen(2) = 0#
 
    ' Create a Circle object in model space
    Dim circObj As AcadCircle
    Set circObj = ThisDrawing.ModelSpace.AddCircle(ptCen, 4.25)
 
    ThisDrawing.Application.ZoomAll
End Sub

Create a Circle Object (.NET)

C#

VB.NET

VBA/ActiveX Code Reference

Related Concepts

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