See #3169. Fix bug where non walls and slabs didn't get semantic classes in drawings.

src/blenderbim/blenderbim/bim/module/drawing/operator.py

@@ -836,15 +836,15 @@ class CreateDrawing(bpy.types.Operator):
         ifc = tool.Ifc.get()
         for el in root.findall(".//{http://www.w3.org/2000/svg}g[@{http://www.ifcopenshell.org/ns}guid]"):
             element = ifc.by_guid(el.get("{http://www.ifcopenshell.org/ns}guid"))
-            # Architectural convention only merges these objects. E.g. pipe segments and fittings shouldn't merge.
-            if not element.is_a("IfcWall") and not element.is_a("IfcSlab"):
-                continue
 
             classes = self.get_svg_classes(element)
             classes.append("cut")
-
             el.set("class", " ".join(classes))
 
+            # Architectural convention only merges these objects. E.g. pipe segments and fittings shouldn't merge.
+            if not element.is_a("IfcWall") and not element.is_a("IfcSlab"):
+                continue
+
             keys = []
             for query in join_criteria:
                 key = ifcopenshell.util.selector.get_element_value(element, query)