Define correctly the USC on Polyline (Rectangle)

[Anonymous]

Hi,

I currently try to set a custom USC over a layout created thanks to a polyline Object :

The current process is:

• Create a custom Layout name and ask the user to validate or create another by himself
• Ask the user to select the layout

var options = new PromptEntityOptions("\nSelect the layout: ");
options.AddAllowedClass(typeof(Polyline), true​

• And then I get the ObjectId of the polyline to set the new USC thanks to this command:

        [CommandMethod("DOCCMD")]
        public void DocumentCmd()
        {   
            Document doc = Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            var ed = AcAp.DocumentManager.MdiActiveDocument.Editor;

            
            string nameUcs;
            ObjectId ids;
            Point2d pt1;
            Point2d pt2;
           
            ids = LA_Layout_Helper.polylineId;

            // Change the current USC to the usc's selected obect
            ed.Command("_ucs", "_object", ids);


            // Save the new USC with the layout name
            nameUcs = "UCS_" + LA_Layout_Helper.nameLayout;
            ed.Command("_.UCS", "_name", "_sa", nameUcs, "");
            
            


            using (var tr = db.TransactionManager.StartTransaction())
            {
                var pline = (Polyline)tr.GetObject(ids, OpenMode.ForRead);
                pt1 = pline.GetPoint2dAt(0);
                pt2 = pline.GetPoint2dAt(2);


                // Initialize the new SCU
                UcsTableRecord ucsRecord;

                // Open the UCS table for read
                var ucsTable = (UcsTable)tr.GetObject(db.UcsTableId, OpenMode.ForRead);


                // Check to see if the table record exists
                if (ucsTable.Has(nameUcs))
                {
                    ucsRecord = tr.GetObject(ucsTable[nameUcs], OpenMode.ForWrite) as UcsTableRecord;
                }
                else
                {
                    ucsRecord = new UcsTableRecord();
                    ucsRecord.Name = nameUcs;

                    // Open the UCSTable for write
                    ucsTable.UpgradeOpen();

                    // Add the new UCS table record
                    ucsTable.Add(ucsRecord);
                    tr.AddNewlyCreatedDBObject(ucsRecord, true);
                }

                
                // Open the active viewport
                ViewportTableRecord acVportTblRec;
                acVportTblRec = tr.GetObject(doc.Editor.ActiveViewportId, OpenMode.ForWrite) as ViewportTableRecord;

                // Display the UCS Icon at the origin of the current viewport
                acVportTblRec.IconAtOrigin = true;
                acVportTblRec.IconEnabled = true;

                // Set the UCS current
                acVportTblRec.SetUcs(ucsRecord.ObjectId);
                doc.Editor.UpdateTiledViewportsFromDatabase();
                

                // Display the name of the current UCS
                UcsTableRecord uscTblRecActive;
                uscTblRecActive = tr.GetObject(acVportTblRec.UcsName, OpenMode.ForRead) as UcsTableRecord;
               
                ed.WriteMessage("\nThe current UCS is: " + uscTblRecActive.Name);

                Matrix3d newMatrix = new Matrix3d();
                newMatrix = Matrix3d.AlignCoordinateSystem(Point3d.Origin, 
                                                           Vector3d.XAxis,
                                                           Vector3d.YAxis, 
                                                           Vector3d.ZAxis,
                                                           acVportTblRec.Ucs.Origin,
                                                           acVportTblRec.Ucs.Xaxis,
                                                           acVportTblRec.Ucs.Yaxis,
                                                           acVportTblRec.Ucs.Zaxis);               

                tr.Commit();
            }

            Vector3d Xucs = db.Ucsxdir;
            View_Helper.CreateViewFrom2Points(doc, "Vue_" + LA_Layout_Helper.nameLayout, new Point3d(pt1.X, pt1.Y, 0), new Point3d(pt2.X, pt2.Y, 0));

            Vector3d Xwcs = db.Ucsxdir;
            LA_Layout_Helper.angleLayout = Xucs.GetAngleTo(Xwcs);
            
        }

The issue here is the new USC is not well placed:

I think that the USC was placed on the first point of the polyline. Do you know a way to fix this issue ?

I already tried :

ed.Command("_.UCS", "_ob");

This command do the job but I cannot check if the user has selected the right layout or even select any object. If he push the touch "enter" that will skip this command for example.

Thanks for your help, and your understanding (I French so excuse me if I did some mistake)

Alexis

[_gile]

Hi,
You should specify the criteria according to which you think UCS is "correct".

Salut,
Tu devrais spécifier les critères selon lesquelles tu estimes que SCU est "correct".