[REQ] Delete groups with just groups in them

Pixero

I'm looking for ways to clean imported models that have multiple nested groups in them which make them hard to work with.

Would it be possible to have a plugin go through the model and check if there are nested groups /components with nothing but a group inside it and if so delete the top group?

Here's a small stripped example how it comes into SketchUp.
group within group.jpg

Group within group.skp

driven

a quick reply

						# grps without edges contain only sub-grps...
            if gents.grep(Sketchup;;Edge) == []
						  # exploding non_manifold, allows same context compares, but you loose the hierachy
						  if !e.manifold?
						    e.explode
						  end
						  next if e.deleted?

I'll have a look at your skp later...

john

driven

this is stripped out of one of mine and may still have a few 'extras' you don't need...

it explodes the edgeless groups and removes the coplanar edges from the faces...

    # digs deep into nesting and removes stuff...
      model    = Sketchup.active_model
      defs     = model.definitions
      ents     = model.active_entities

      ##########################
      model.start_operation('Clean Import')
      # remove unwanted support geometry
			ents.grep(Sketchup;;SectionPlane){|sp| sp.erase!}
			ents.grep(Sketchup;;ConstructionPoint){|cp| cp.erase!}
			ents.grep(Sketchup;;ConstructionLine){|cl| cl.erase!}

      ents.find_all do |e|
        # keep any raw geometry...
        next if e.class == Sketchup;;Edge or e.class == Sketchup;;Face
        # remove previous 'sections cuts' ...
        e.erase! if !e.layer.visible? or e.definition.name.include?('-Section')
        next unless e.valid?

        # remove hidden geometry
        ents.erase_entities(e) if e.respond_to?(;hidden?) and e.hidden?
        next unless e.valid?

        if  e.class == Sketchup;;ComponentInstance || e.class == Sketchup;;Group

					  # sub-groupings
						gents = e.entities if e.class == Sketchup;;Group
						gents = e.definition.entities if e.class == Sketchup;;ComponentInstance

						# remove unwanted nested support geometry
						gents.grep(Sketchup;;SectionPlane){|sp| sp.erase!}
						gents.grep(Sketchup;;ConstructionPoint){|cp| cp.erase!}
						gents.grep(Sketchup;;ConstructionLine){|cl| cl.erase!}
						# remove coplaner edges...
						gents.grep(Sketchup;;Edge) do |e|
							e.erase! if  e.valid? &&
              e.soft? &&
              e.faces.length == 2 &&
              e.faces[0].normal.dot(e.faces[1].normal)>0.9999999999999
						end
						next if e.deleted?

			  # grps without edges contain only sub-grps...
            if gents.grep(Sketchup;;Edge) == []
						  # exploding non_manifold, allows same context compares, but you loose the hierachy
						  if !e.manifold?
						    e.explode
						  end
						  next if e.deleted?
						end
        end # e.class
      end # ents.find_all do

      model.commit_operation # 'Clean Import'

john

Pixero

Thanks!
I've tried that last one on one of the example scenes from Revit and it worked but it took about an hour to run.
Is there any way to speed it up?

driven

you should have mentioned revit, before my computer broke…

it's possibly quicker as this one was really for working with unknown skp files...

in the ifc cleanup script I target the wrappers first by type name…

there's some excerpt's I posted on the SketchUp forum, showing adding materials, moving some to layers and hiding, etc…

hopefully I can rescue my hard drive as I haven't made a backup for ages…

john

Pixero

Ok. I'll search that forum for your post then.
Edit: Can't find it. Perhaps a link...?
Actually I'm not using IFC but a Free Revit to OBJ exporter plugin and then Fluid interactives OBJ importer plugin for testing ways to get a Revit models into SU with Materials preserved.
As you know dwgs don't preserve materials but get the geometry nice and cleanly grouped.
My tries with IFC havn't been that good so looking for alternatives now...
And good luck with your harddrive.

Pixero

I commented away all that stuff i didn't need and now it was superfast. Less than a second on the same model.
Will try with the deleted coplanar edges added and see how fast it is...

Edit: Nope, that took a great while. Tried again with just the remove groups part and then Thomthoms CleanUp and that finished in some 30 seconds.