Create Snippets_DimensionGrids

Author: dnenov

1-csharp-code/Snippets_DimensionGrids

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+/*
+Create a dimension line between all chosen grid. The gird lines need to be parallel to each other,
+which is the case most of the time but not always.
+TESTED REVIT API: 2018
+The snippet can be used as is in a Revit Application Macro for test purposes
+Author: Deyan Nenov | github.com/ArchilizerLtd | www.archilizer.com 
+This file is shared on www.revitapidocs.com
+For more information visit http://github.com/gtalarico/revitapidocs
+License: http://github.com/gtalarico/revitapidocs/blob/master/LICENSE.md
+*/
+
+public void DimGrids()
+{			
+  UIDocument uidoc = this.ActiveUIDocument;
+  Document doc = uidoc.Document;
+
+  // Pick all the grid lines you want to dimension to
+  GridSelectionFilter filter = new ThisApplication.GridSelectionFilter(doc);			
+  IList<Element> grids = uidoc.Selection.PickElementsByRectangle(filter, "Pick Grid Lines");
+
+  ReferenceArray refArray = new ReferenceArray();
+  XYZ dir = null;
+
+  foreach(Element el in grids)
+  {
+    Grid gr = el as Grid;
+
+    if(gr == null) continue;	
+    if(dir == null)
+    {
+      Curve crv = gr.Curve;
+      dir = new XYZ(0,0,1).CrossProduct((crv.GetEndPoint(0) - crv.GetEndPoint(1)));	// Get the direction of the gridline
+    }
+
+    Reference gridRef = null;
+
+    // Options to extract the reference geometry needed for the NewDimension method
+    Options opt = new Options();
+    opt.ComputeReferences = true;
+    opt.IncludeNonVisibleObjects = true;
+    opt.View = doc.ActiveView;
+    foreach (GeometryObject obj in gr.get_Geometry(opt))
+    {
+      if (obj is Line)
+      {
+        Line l = obj as Line;
+        gridRef = l.Reference;
+        refArray.Append(gridRef);	// Append to the list of all reference lines 
+      }
+    }
+  }
+
+  XYZ pickPoint = uidoc.Selection.PickPoint();	// Pick a placement point for the dimension line
+  Line line = Line.CreateBound(pickPoint, pickPoint + dir * 100);		// Creates the line to be used for the dimension line
+
+  using(Transaction t = new Transaction(doc, "Make Dim"))
+  {
+    t.Start();
+    if( !doc.IsFamilyDocument )
+    {
+      doc.Create.NewDimension( 
+        doc.ActiveView, line, refArray);
+    }				
+    t.Commit();
+  }					
+}