BuildingCoder.CmdDimensionInstanceOrigin.Execute C# (CSharp) Метод

        public Result Execute(
            ExternalCommandData commandData,
            ref string message,
            ElementSet elements)
        {
            UIApplication app = commandData.Application;
              UIDocument uidoc = app.ActiveUIDocument;
              Document doc = uidoc.Document;

              JtPairPicker<FamilyInstance> picker
            = new JtPairPicker<FamilyInstance>( uidoc );

              Result rc = picker.Pick();

              if( Result.Failed == rc )
              {
            message = "We need at least two "
              + "FamilyInstance elements in the model.";
              }
              else if( Result.Succeeded == rc )
              {
            IList<FamilyInstance> a = picker.Selected;

            _opt = new Options();
            _opt.ComputeReferences = true;
            _opt.IncludeNonVisibleObjects = true;

            XYZ[] pts = new XYZ[2];
            Reference[] refs = new Reference[2];

            pts[0] = ( a[0].Location as LocationPoint ).Point;
            pts[1] = ( a[1].Location as LocationPoint ).Point;

            refs[0] = GetFamilyInstancePointReference( a[0] );
            refs[1] = GetFamilyInstancePointReference( a[1] );

            CmdDimensionWallsIterateFaces
              .CreateDimensionElement( doc.ActiveView,
              pts[0], refs[0], pts[1], refs[1] );
              }
              return rc;
        }