This example creates a circle, and then performs a polar array of the circle. This creates four circles filling 180 degrees around a base point of (4, 4, 0).
Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.Geometry
Public Shared Function PolarPoints(ByVal pPt As Point2d, _
ByVal dAng As Double, _
ByVal dDist As Double)
Return New Point2d(pPt.X + dDist * Math.Cos(dAng), _
pPt.Y + dDist * Math.Sin(dAng))
End Function
<CommandMethod("PolarArrayObject")> _
Public Sub PolarArrayObject()
'' 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 record 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 2,2 with a radius of 1
Using acCirc As Circle = New Circle()
acCirc.Center = New Point3d(2, 2, 0)
acCirc.Radius = 1
'' Add the new object to the block table record and the transaction
acBlkTblRec.AppendEntity(acCirc)
acTrans.AddNewlyCreatedDBObject(acCirc, True)
'' Create a 4 object polar array that goes a 180
Dim nCount As Integer = 1
'' Set a value in radians for 60 degrees
Dim dAng As Double = 1.0472
'' Use (4,4,0) as the base point for the array
Dim acPt2dArrayBase As Point2d = New Point2d(4, 4)
While (nCount < 4)
Dim acEntClone As Entity = acCirc.Clone()
Dim acExts As Extents3d
Dim acPtObjBase As Point2d
'' Typically the upper-left corner of an object's extents is used
'' for the point on the object to be arrayed unless it is
'' an object like a circle.
Dim acCircArrObj As Circle = acEntClone
If IsDBNull(acCircArrObj) = False Then
acPtObjBase = New Point2d(acCircArrObj.Center.X, _
acCircArrObj.Center.Y)
Else
acExts = acEntClone.Bounds.GetValueOrDefault()
acPtObjBase = New Point2d(acExts.MinPoint.X, _
acExts.MaxPoint.Y)
End If
Dim dDist As Double = acPt2dArrayBase.GetDistanceTo(acPtObjBase)
Dim dAngFromX As Double = acPt2dArrayBase.GetVectorTo(acPtObjBase).Angle
Dim acPt2dTo As Point2d = PolarPoints(acPt2dArrayBase, _
(nCount * dAng) + dAngFromX, _
dDist)
Dim acVec2d As Vector2d = acPtObjBase.GetVectorTo(acPt2dTo)
Dim acVec3d As Vector3d = New Vector3d(acVec2d.X, acVec2d.Y, 0)
acEntClone.TransformBy(Matrix3d.Displacement(acVec3d))
'' The following code demonstrates how to rotate each object like
'' the ARRAY command does.
'acExts = acEntClone.Bounds.GetValueOrDefault()
'acPtObjBase = New Point2d(acExts.MinPoint.X, _
' acExts.MaxPoint.Y)
'
'' Rotate the cloned entity and around its upper-left extents point
'Dim curUCSMatrix As Matrix3d = acDoc.Editor.CurrentUserCoordinateSystem
'Dim curUCS As CoordinateSystem3d = curUCSMatrix.CoordinateSystem3d
'acEntClone.TransformBy(Matrix3d.Rotation(nCount * dAng, _
' curUCS.Zaxis, _
' New Point3d(acPtObjBase.X, _
' acPtObjBase.Y, 0)))
acBlkTblRec.AppendEntity(acEntClone)
acTrans.AddNewlyCreatedDBObject(acEntClone, True)
nCount = nCount + 1
End While
End Using
'' Save the new objects to the database
acTrans.Commit()
End Using
End Sub
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
static Point2d PolarPoints(Point2d pPt, double dAng, double dDist)
{
return new Point2d(pPt.X + dDist * Math.Cos(dAng),
pPt.Y + dDist * Math.Sin(dAng));
}
[CommandMethod("PolarArrayObject")]
public static void PolarArrayObject()
{
// 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 record 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 2,2 with a radius of 1
using (Circle acCirc = new Circle())
{
acCirc.Center = new Point3d(2, 2, 0);
acCirc.Radius = 1;
// Add the new object to the block table record and the transaction
acBlkTblRec.AppendEntity(acCirc);
acTrans.AddNewlyCreatedDBObject(acCirc, true);
// Create a 4 object polar array that goes a 180
int nCount = 1;
// Set a value in radians for 60 degrees
double dAng = 1.0472;
// Use (4,4,0) as the base point for the array
Point2d acPt2dArrayBase = new Point2d(4, 4);
while (nCount < 4)
{
Entity acEntClone = acCirc.Clone() as Entity;
Extents3d acExts;
Point2d acPtObjBase;
// Typically the upper-left corner of an object's extents is used
// for the point on the object to be arrayed unless it is
// an object like a circle.
Circle acCircArrObj = acEntClone as Circle;
if (acCircArrObj != null)
{
acPtObjBase = new Point2d(acCircArrObj.Center.X,
acCircArrObj.Center.Y);
}
else
{
acExts = acEntClone.Bounds.GetValueOrDefault();
acPtObjBase = new Point2d(acExts.MinPoint.X,
acExts.MaxPoint.Y);
}
double dDist = acPt2dArrayBase.GetDistanceTo(acPtObjBase);
double dAngFromX = acPt2dArrayBase.GetVectorTo(acPtObjBase).Angle;
Point2d acPt2dTo = PolarPoints(acPt2dArrayBase,
(nCount * dAng) + dAngFromX,
dDist);
Vector2d acVec2d = acPtObjBase.GetVectorTo(acPt2dTo);
Vector3d acVec3d = new Vector3d(acVec2d.X, acVec2d.Y, 0);
acEntClone.TransformBy(Matrix3d.Displacement(acVec3d));
/*
// The following code demonstrates how to rotate each object like
// the ARRAY command does.
acExts = acEntClone.Bounds.GetValueOrDefault();
acPtObjBase = new Point2d(acExts.MinPoint.X,
acExts.MaxPoint.Y);
// Rotate the cloned entity around its upper-left extents point
Matrix3d curUCSMatrix = acDoc.Editor.CurrentUserCoordinateSystem;
CoordinateSystem3d curUCS = curUCSMatrix.CoordinateSystem3d;
acEntClone.TransformBy(Matrix3d.Rotation(nCount * dAng,
curUCS.Zaxis,
new Point3d(acPtObjBase.X,
acPtObjBase.Y, 0)));
*/
acBlkTblRec.AppendEntity(acEntClone);
acTrans.AddNewlyCreatedDBObject(acEntClone, true);
nCount = nCount + 1;
}
}
// Save the new objects to the database
acTrans.Commit();
}
}
Sub PolarArrayObject()
' Create the circle
Dim circleObj As AcadCircle
Dim center(0 To 2) As Double
Dim radius As Double
center(0) = 2#: center(1) = 2#: center(2) = 0#
radius = 1
Set circleObj = ThisDrawing.ModelSpace. _
AddCircle(center, radius)
ZoomAll
' Define the polar array
Dim noOfObjects As Integer
Dim angleToFill As Double
Dim basePnt(0 To 2) As Double
noOfObjects = 4
angleToFill = 3.14 ' 180 degrees
basePnt(0) = 4#: basePnt(1) = 4#: basePnt(2) = 0#
' The following example will create 4 copies
' of an object by rotating and copying it about
' the point (4,4,0).
Dim retObj As Variant
retObj = circleObj.ArrayPolar _
(noOfObjects, angleToFill, basePnt)
ZoomAll
End Sub