Script to Delete Hidden Objects?

Tim Danaher

Is there one?

The reason I ask, is because I've got a model that I'm trying to apply bomb.rb to, but every so often SU throws up the dialog 'Your recent operation has caused geometry to become merged with hidden geometry'. yesterday I set the script going when I left the house (it takes its time on complex models), and when I got back at 22:00, there was the dialog waiting for me --- the script may have been doing nothing all that time.

As far as I know, there's no hidden geometry in my model, but there must be some tucked away in sub-groups somewhere...that's why a script like this would be so useful.

chrisjk

I don't think hidden geometry is what you want to delete automatically - everything with a curve would disappear! Equally deleting hidden objects doesn't seem sensible if you have hidden rather than deleted them in the first place.

Tim Danaher

Chris --

Hidden objects, yes.

Why wouldn't I want to delete them? I often forget that hidden objects are there. I've just waited nearly a day and a half for this model to explode, and the hidden objects have, naturally,become unhidden. What's more, due to the nature and size of this model, simply deleting them isn't an option. The exploded model is unmanageable in SketchUp.

So, you see, I do want to delete hidden objects before preparing a model for export.

chrisjk

Tim,

For objects, I'd just Select All and copy it to a new window and save that as a new model version - leaving all the hidden stuff behind. You could then unhide it and inspect it for anything you might want to keep.

TIG


def erase_if_hidden()
  Sketchup.active_model.entities.to_a.each{|e|e.erase! if e.valid? and e.hidden?}
  Sketchup.active_model.definitions.each{|d|d.entities.to_a.each{|e|e.erase! if e.valid? and e.hidden?}}
end#def

Copy/paste this code into a text file called erase_if_hidden.rb in the Plugins folder.
Restart Sketchup.
To use it type erase_if_hidden + <enter> into the Ruby Console.
Use with care since ALL hidden geometry WILL be erased - it is ruthless !!!
Remember that if you have an edge that is hidden but it has a face that isn't then the edge's deletion could remove the face too...
Best to switch all Layers 'on' and View > Hidden Geometry 'on' before using this just to check what is actually hidden...

Tim Danaher

TIG --

You da man!

Cheers, Matey...

Chris --

So, would that work for hidden objects that are inside other groups and components?

TIG

@tim danaher said:

TIG --

You da man!

Cheers, Matey...

Chris --

So, would that work for hidden objects that are inside other groups and components?

Copy/paste will carry over hidden stuff that's inside definitions.
My ruby erases absolutely ALL hidden entities - even inside groups/components etc...

chrisjk

Um..... No

Mike Lucey

Tim, Let us know how you get on with TIG's solution. Thanks TIG

remus

Wont that wreak havoc if youve got any hidden lines?

TIG

@remus said:

Won't that wreak havoc if you've got any hidden lines?

YES - that's why I heavily caveated it - HE wants to do it, so on his head be it...

cjthompson

Why not make it select all hidden entities? That way, he can see what is hidden, and then just press the delete key.

TIG

@cjthompson said:

Why not make it select all hidden entities? That way, he can see what is hidden, and then just press the delete key.

Some might be inside instances and erasing across entities-sets might bugsplat

Chris Fullmer

Would it be better to just move all geometry to layer 0 first, then delete all other layers.

Then there should not be this conflict, yeah?

Chris

Tim Danaher

Mike --

Will do... (if this file ever gets exploded).

Seriously, though, what an arseache.

Before I ran bomb.rb, I Unhid All, so there would be NO hidden geometry, but I'm stll getting these 'Your recent operation has caused geometry to become merged with hidden geometry'. How, if there's no hidden geometry?

And what's more, I'm also getting 'Your recent operation has caused geometry to become merged with geometry on a hidden layer'.

Now, here's a clue: I DON'T USE LAYERS. The only layer that there can be in my model is Layer 0, which is visible by default. I don't think the problem is with bomb.rb, it's some change made to the app itself.

Oh, and I only got TIG's script after I started the current Explode All operation (at 2 o'clock yesterday arvo).

Right. It's just finished.

This is what I got from the Ruby console:

erase_if_hidden
Error: #<NameError: undefined local variable or method `erase_if_hidden' for main:Object>
(eval)

edit: Oh, and this from the Load Error window:

^Error Loading File erase_if_hidden.rb
/Library/Application Support/Google SketchUp 7/SketchUp/Plugins/erase_if_hidden.rb:1: parse error, unexpected tCONSTANT, expecting kEND
def erase_if_hidden()
Sketchup.active_model.entities.to_a.each{|e|e.erase! if e.valid? and e.hidden?}
Sketchup.active_model.definitions.each{|d|d.entities.to_a.each{|e|e.erase! if e.valid? and e.hidden?}}
end#def

TIG

The file must be made with a plain-text editor [like Notepad.exe - don't know what that is on a Mac] NOT a word-processor ! I suspect hidden characters - here's the thing ready made erase_if_hidden.rb

Tim Danaher

Cheers, TIG --

I d/l'ed your file and put it in the plugins folder, and I'm happy to report it does exactly what it says on the tin!!!