topic Re: How to rotate set of objects along an axis in AutoCAD? in AutoCAD Forum

How to rotate set of objects along an axis in AutoCAD?

jlobo2 — Tue, 23 Jul 2019 13:47:18 GMT

We are implementing an application, where we are drawing objects, representing a panel, which represents the columns of the wall. I need to rotate the set of objects (the columns) together on one axis.

How do I achieve it?

Expected Result

I have the following code, but it's for rotating each objects.

            using (Transaction acTrans = dwgDb.TransactionManager.StartTransaction())
            {
                // Access drawing block table
                pBlockTbl = acTrans.GetObject(dwgDb.BlockTableId, OpenMode.ForWrite) as BlockTable;

                pBlockRef = (BlockReference)acTrans.GetObject(thePANBLKBlockReference, OpenMode.ForWrite);
                pBlockRef.ColorIndex = colorIndex;

                Point3d tempPoint = pBlockRef.Position;

                Matrix3d curUCSMatrix = acDoc.Editor.CurrentUserCoordinateSystem;
                CoordinateSystem3d curUCS = curUCSMatrix.CoordinateSystem3d;

                // Rotate the polyline 45 degrees, around the Z-axis of the current UCS
                pBlockRef.TransformBy(Matrix3d.Rotation(0.7854,
                                                     curUCS.Yaxis,
                                                     tempPoint)); 


                acTrans.Commit();
            }

Re: How to rotate set of objects along an axis in AutoCAD?

Alexander.Rivilis — Tue, 23 Jul 2019 13:50:59 GMT

You have to set single tempPoint to the value of base point of rotation. It is not a Position of BlockReference in your case.

Re: How to rotate set of objects along an axis in AutoCAD?

Alexander.Rivilis — Tue, 23 Jul 2019 13:54:01 GMT

By the way, why this topic was created in this forum ??? This is not the first time you selected wrong forum.

Re: How to rotate set of objects along an axis in AutoCAD?

jlobo2 — Tue, 23 Jul 2019 13:57:42 GMT

Got the Output. Thank you @Alexander.Rivilis

Sorry about the forum. Which forum should I use for posting these questions?

Re: How to rotate set of objects along an axis in AutoCAD?

Alexander.Rivilis — Tue, 23 Jul 2019 13:59:43 GMT

@jlobo2 wrote:

Got the Output. Thank you @Alexander.Rivilis

Sorry about the forum. Which forum should I use for posting these questions?

You should posting such questions to .NET forum: https://forums.autodesk.com/t5/net/bd-p/152

Re: How to rotate set of objects along an axis in AutoCAD?

Alexander.Rivilis — Tue, 23 Jul 2019 14:01:02 GMT

@jlobo2 wrote:

Got the Output. Thank you @Alexander.Rivilis

Problem was solved now?

Re: How to rotate set of objects along an axis in AutoCAD?

jlobo2 — Tue, 23 Jul 2019 14:04:38 GMT

Yes @Alexander.Rivilis Thank You once again.

I will be mindful of posting such questions in the .NET forum henceforth.