How to sync UCS with current view like command UCS+V

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3 responses to “How to sync UCS with current view like command UCS+V”

1. 

   AlexFielder

   May 10, 2012

   Thanks Phillipe, this could be very useful.
   Do you have any examples of how to produce similar functionality to that of the PLAN command? (Aligning a view to a UCS)

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2. 

   Philippe Leefsma

   May 16, 2012

   Hi Alex,
   I don’t have code that does exactly this, but below are two samples: the first one illustrates how to set properties for the current view, the second how to deal with UCSs. By combining both, you should be able to create code that provides the same functionalities than PLAN command.
   [CommandMethod(“SetView”)]
   public static void SetView()
   {
   Document doc = Application.DocumentManager.MdiActiveDocument;
   Database db = doc.Database;
   Editor ed = doc.Editor;
   PromptPointOptions ppo1 =
   new PromptPointOptions(“\nEnter view target:”);
   PromptPointResult ppr1 = ed.GetPoint(ppo1);
   if (ppr1.Status != PromptStatus.OK)
   return;
   if (ppr1.Status != PromptStatus.OK)
   return;
   PromptPointOptions ppo2 =
   new PromptPointOptions(“\nEnter point for camera: “);
   PromptPointResult ppr2 = ed.GetPoint(ppo2);
   if (ppr2.Status != PromptStatus.OK)
   return;
   using (ViewTableRecord vtr = new ViewTableRecord())
   {
   vtr.Target = ppr1.Value;
   vtr.ViewDirection = vtr.Target.GetVectorTo(ppr2.Value);
   Point3d camPt = vtr.Target.Add(vtr.ViewDirection);
   ed.WriteMessage(“\nCamera point x = ” + camPt.X.ToString());
   ed.WriteMessage(“\nCamera point y = ” + camPt.Y.ToString());
   ed.WriteMessage(“\nCamera point z = ” + camPt.Z.ToString());
   vtr.Height = 50.0;
   vtr.CenterPoint = Point2d.Origin;
   ed.SetCurrentView(vtr);
   }
   }
   [CommandMethod(“NewUCS”)]
   public static void NewUCS()
   {
   Document doc = Application.DocumentManager.MdiActiveDocument;
   Database db = doc.Database;
   using (Transaction Tx = db.TransactionManager.StartTransaction())
   {
   // Open the UCS table for read
   UcsTable acUCSTbl;
   acUCSTbl = Tx.GetObject(
   db.UcsTableId,
   OpenMode.ForRead)
   as UcsTable;
   UcsTableRecord acUCSTblRec;
   // Check to see if the “New_UCS” UCS table record exists
   if (acUCSTbl.Has(“New_UCS”) == false)
   {
   acUCSTblRec = new UcsTableRecord();
   acUCSTblRec.Name = “New_UCS”;
   // Open the UCSTable for write
   acUCSTbl.UpgradeOpen();
   // Add the new UCS table record
   acUCSTbl.Add(acUCSTblRec);
   Tx.AddNewlyCreatedDBObject(acUCSTblRec, true);
   }
   else
   {
   acUCSTblRec = Tx.GetObject(
   acUCSTbl[“New_UCS”],
   OpenMode.ForWrite)
   as UcsTableRecord;
   }
   acUCSTblRec.Origin = new Point3d(4, 5, 3);
   acUCSTblRec.XAxis = new Vector3d(0, 1, 0);
   acUCSTblRec.YAxis = new Vector3d(0, 0, 1);
   // Open the active viewport
   ViewportTableRecord acVportTblRec;
   acVportTblRec = Tx.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(acUCSTblRec.ObjectId);
   doc.Editor.UpdateTiledViewportsFromDatabase();
   // Display the name of the current UCS
   UcsTableRecord acUCSTblRecActive;
   acUCSTblRecActive = Tx.GetObject(
   acVportTblRec.UcsName,
   OpenMode.ForRead)
   as UcsTableRecord;
   Application.ShowAlertDialog(
   “The current UCS is: ” + acUCSTblRecActive.Name);
   PromptPointResult pPtRes;
   PromptPointOptions pPtOpts = new PromptPointOptions(“”);
   // Prompt for a point
   pPtOpts.Message = “\nEnter a point: “;
   pPtRes = doc.Editor.GetPoint(pPtOpts);
   Point3d pPt3dWCS;
   Point3d pPt3dUCS;
   // If a point was entered, then translate it to the current UCS
   if (pPtRes.Status == PromptStatus.OK)
   {
   pPt3dWCS = pPtRes.Value;
   pPt3dUCS = pPtRes.Value;
   // Translate the point from the current UCS to the WCS
   Matrix3d newMatrix = doc.Editor.CurrentUserCoordinateSystem;
   pPt3dWCS = pPt3dWCS.TransformBy(newMatrix);
   Application.ShowAlertDialog(
   “The WCS coordinates are: \n” + pPt3dWCS.ToString() + “\n” +
   “The UCS coordinates are: \n” + pPt3dUCS.ToString());
   }
   Tx.Commit();
   }
   }

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3. 

   Maxence

   February 27, 2014

   Simplest version:
   [CommandMethod(“UcsV”)]
   public void UcsV()
   {
   Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
   using (ViewTableRecord view = ed.GetCurrentView())
   {
   ed.CurrentUserCoordinateSystem = Matrix3d.PlaneToWorld(view.ViewDirection)
   * Matrix3d.Rotation(-view.ViewTwist, Vector3d.ZAxis, Point3d.Origin);
   }
   }

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