1. def get_all_face (entities, face_arr = [])
2.         entities.each do |entity|
3.             if entity.is_a?(Sketchup::Group) || entity.is_a?(Sketchup::ComponentInstance) 
4.                 entities_inside = entity.definition.entities 
5.                 get_all_face(entities_inside, face_arr )
6.  
7.             elsif entity.class == Sketchup::Face
8.                 face_arr << entity
9.             end
10.         end
11.         face_arr 
12. end
13.  
14. current_time = Time.now
15. formatted_time = current_time.strftime("%d/%m/%Y %H:%M")
16. puts "Start time apply layer: #{formatted_time}"
17.  
18. model = Sketchup.active_model
19. layers = model.layers
20. all_entities = model.entities
21. all_face = get_all_face(all_entities)
22.  
23. model.start_operation("apply Layer", true)
24.     my_layer = layers.add('my new layer')
25.  
26.     for face in all_face do 
27.         face.layer = my_layer 
28.     end
29.  
30. model.commit_operation
31.  
32. current_time = Time.now
33. formatted_time = current_time.strftime("%d/%m/%Y %H:%M")
34. puts "End time apply layer: #{formatted_time}"