BuildingCoder.CmdCropToRoom.Execute C# (CSharp) Méthode

        public Result Execute(
            ExternalCommandData commandData,
            ref string message,
            ElementSet elements)
        {
            UIApplication app = commandData.Application;
              Document doc = app.ActiveUIDocument.Document;
              View3D view3d = doc.ActiveView as View3D;

              if( null == view3d )
              {
            message = "Please activate a 3D view"
              + " before running this command.";

            return Result.Failed;
              }

              using ( Transaction t = new Transaction( doc ) )
              {
            t.Start( "Crop to Room" );

            // get the 3d view crop box:

            BoundingBoxXYZ bb = view3d.CropBox;

            // get the transform from the current view
            // to the 3D model:

            Transform transform = bb.Transform;

            // get the transform from the 3D model
            // to the current view:

            Transform transformInverse = transform.Inverse;

            // get all rooms in the model:

            FilteredElementCollector collector
              = new FilteredElementCollector( doc );

            collector.OfClass( typeof( Room ) );
            IList<Element> rooms = collector.ToElements();
            int n = rooms.Count;

            Room room = ( 0 < n )
              ? rooms[BumpRoomIndex( n )] as Room
              : null;

            if ( null == room )
            {
              message = "No room element found in project.";
              return Result.Failed;
            }

            // Collect all vertices of room closed shell
            // to determine its extents:

            GeometryElement e = room.ClosedShell;
            List<XYZ> vertices = new List<XYZ>();

            //foreach( GeometryObject o in e.Objects ) // 2012

            foreach ( GeometryObject o in e ) // 2013
            {
              if ( o is Solid )
              {
            // Iterate over all the edges of all solids:

            Solid solid = o as Solid;

            foreach ( Edge edge in solid.Edges )
            {
              foreach ( XYZ p in edge.Tessellate() )
              {
                // Collect all vertices,
                // including duplicates:

                vertices.Add( p );
              }
            }
              }
            }

            List<XYZ> verticesIn3dView = new List<XYZ>();

            foreach ( XYZ p in vertices )
            {
              verticesIn3dView.Add(
            transformInverse.OfPoint( p ) );
            }

            // Ignore the Z coorindates and find the
            // min and max X and Y in the 3d view:

            double xMin = 0, yMin = 0, xMax = 0, yMax = 0;

            bool first = true;
            foreach ( XYZ p in verticesIn3dView )
            {
              if ( first )
              {
            xMin = p.X;
            yMin = p.Y;
            xMax = p.X;
            yMax = p.Y;
            first = false;
              }
              else
              {
            if ( xMin > p.X )
              xMin = p.X;
            if ( yMin > p.Y )
              yMin = p.Y;
            if ( xMax < p.X )
              xMax = p.X;
            if ( yMax < p.Y )
              yMax = p.Y;
              }
            }

            // Grow the crop box by one twentieth of its
            // size to include the walls of the room:

            double d = 0.05 * ( xMax - xMin );
            xMin = xMin - d;
            xMax = xMax + d;

            d = 0.05 * ( yMax - yMin );
            yMin = yMin - d;
            yMax = yMax + d;

            bb.Max = new XYZ( xMax, yMax, bb.Max.Z );
            bb.Min = new XYZ( xMin, yMin, bb.Min.Z );

            view3d.CropBox = bb;

            // Change the crop view setting manually or
            // programmatically to see the result:

            view3d.CropBoxActive = true;
            view3d.CropBoxVisible = true;
            t.Commit();
              }
              return Result.Succeeded;
        }