[Req] Check for N-Gons

[remus]

Cheers for the explanation

[Khai]

presto reserectus!

http://forums.sketchucation.com/viewtopic.php?f=169&t=24681&p=247955#p247955

I'm wondering if this can be expanded now to highlight the Ngons? we're finding with Sculptis it rejects any faces with more than 4 faces....

[remus]

Try this in the webconsole. To be honest your probably better off using TIGs triangulate faces ruby, though...

model = Sketchup.active_model
entities = model.active_entities
selection = model.selection

n = 0

entities.each{|e|
  if e.is_a? Sketchup;;Face
    if e.edges.length > 4
      n += 1
      selection.add(e)
    end      
  end
}

if n > 0
  UI.messagebox("Contains N-Gons (Faces with >4 sides)")
else
  UI.messagebox("N-gon free!")
end

[Khai]

webconsole?

and I explained back in this thread.. I can't tri the mesh. I'm moving from here (I love the modeler!) to app that don't like things being totally tri's... so that ruby's no good to me.

[remus]

Webconsole is a handy little ruby that lets you run bits of ruby in SU without having to package it as a separate file. You can find it here: http://sketchuptips.blogspot.com/2007/08/plugin-webconsolerb.html

Just install it as usual, open SU, hit the appropriate menu item, copy and paste the code in and click run.

I'll get going on a normal version, but no promises. Its been a while since ive written a ruby.

[remus]

Ok, here you go.

Several improvements in v.3:
works over the entire model (in groups and components), thanks to TIGs handy little snippet.
Adds all N-gons to a new selection
Tells you how many N-Gons there are in the model
Added a Tri check which can be accessed by typing tri_check() in to the ruby console

---

ngon_check.rb

[Stinkie]

Thanks!

[Khai]

not working right.... it's reporting everything has 18 N-gons... even a cube.....

wish I could help but I'm no programmer

[remus]

Hmmm, most unusual. Working ok for me. Could you post a problem model?

[Khai]

no point.. since even a simple six sided cube is reporting '18 Ngons' tho, if I add 3 Ngons... it reports '21 Ngons' !

for some reason it's reporting 18 instead of 0....

Edit

Found the problem. it's checking all the entities in the scene. example : a new scene automatically has 18 Ngons = the default human figure.

even deleting him, he registers in the Ngon check.. do a purge and remove him totally, it reports correctly...