SU 8 Mac & strange content

[tomasz]

@unknownuser said:

Error: #<NoMethodError: undefined method layer' for #<Sketchup::RenderingOptions:0x1cc090c4>> (eval):2537:in collect_faces'

This is a dump of a Ruby console, when an exporter stopped with the error.
The 'collect_faces' method browse through Sketchup.active_model.entities or through a selection.

How is it possible that suddenly Sketchup::RenderingOptions:0x1cc090c4 are part of entities, among edges, faces, groups and components?

Has anyone experienced similar thing on Mac? I haven't spotted such a strange content in Windows version.

[TIG]

What export tool were you running when the error appeared ?
Is it repeatable ?
Did the export complete OK or fail ?
Does it only happen with a certain SKP or consistently ?
Is there anything 'unusual' about the SKP ? e.g. very big, very small, many textures, unusual rendering settings, fog etc...

[Dan Rathbun]

@unknownuser said:

@unknownuser said:

Error: #<NoMethodError: undefined method layer' for #<Sketchup::RenderingOptions:0x1cc090c4>> (eval):2537:in collect_faces'

This is a dump of a Ruby console, when an exporter stopped with the error.
The 'collect_faces' method browse through Sketchup.active_model.entities or through a selection.

How is it possible that suddenly Sketchup::RenderingOptions:0x1cc090c4 are part of entities, among edges, faces, groups and components?

The simpliest explanation would be that you have a reference error. Somehow the reference variable you are using to walk the entities is also being set to refer to a Sketchup::RenderingOptions object, which can be for the active_model or a Scene(Page) object.

Make sure if you are within a method, collect_faces() that you use unique var names. Use a different var name for accessing the rendering options than you do for walking the entities.

Also you can do Type checking... check the return type from your method:

ret = collect_faces()
if ret.is_a?(Array) && ret.all?{|member| member.kind_of?(Sketchup;;Drawingelement) }
  # do code
else
  # recover code, such as slicing non-drawingelement
  # members out of the array
end

I also notice you are getting a "eval:line number" in the exception error. If this error is occuring in a scrambled rbs file.. you should load and debug your non-scrambled version, which should return the file and line number where the error is occuring.

[Dan Rathbun]

@dan rathbun said:

@unknownuser said:

How is it possible that suddenly Sketchup::RenderingOptions:0x1cc090c4 are part of entities, among edges, faces, groups and components?

The simpliest explanation would be that you have a reference error. Somehow the reference variable you are using to walk the entities is also being set to refer to a Sketchup::RenderingOptions object, which can be for the active_model or a Scene(Page) object.

There is an error in the APC docs for Sketchup::RenderingOptions.

The superclass of Sketchup::RenderingOptions is Sketchup::Entity, not Object.

Also, .parent() does not work for Sketchup::RenderingOptions instances. It returns nil.
It would be nice if .parent() returned the model for the model's rendering options hash, and the specific Sketchup::Page object for a scenepage rendering options hash. (Something for the wishlist..)

Anyway.. I tested the model's entities collection on a new model, and it does not (normally,) contain the reference to it's Sketchup::RenderingOptions instance. Perhaps you've found a bug?

Just to be safe, I would suggest typechecking each member of the entities collection while iterating to test that it is indeed a subclass of Sketchup::Drawingelement before calling any method on the object, such as .layer() in your example above.

Inside your entities iteration loop:

# ents= model.active_entites
# or the entities of a group or component
ents.each do |ent|
  if ent.kind_of?(Sketchup;;Drawingelement)
    # process for export
  end # if
  # else ignore the object
end

[tomasz]

@tig said:

What export tool were you running when the error appeared ?
Is it repeatable ?
Did the export complete OK or fail ?
Does it only happen with a certain SKP or consistently ?
Is there anything 'unusual' about the SKP ? e.g. very big, very small, many textures, unusual rendering settings, fog etc...

I am testing Thea Exporter SU2TH.
The problem is that the error is not repeatable.I haven't discovered a certain pattern that leads to the appearance of 'strange' objects among entities. When such an unexpected entity appears it leads to a failure of an export.
There is nothing unusual in files.
It is strange. I started to set up a traps in my code to hijack such a 'foreign entities', but I am not able to guard all the code.

I have noticed that those errors appear on MACs only (so far). I work primarily under Win. I have to spend more time on MAC to figure out what is going on.

Thank you Dan for all suggestions. I will give them a try.
My intuition tells me that there might me a 'leak' in SU 8 on MAC that allows such a behavior.

[Dan Rathbun]

Just a reminder (for anyone reading,) that we should not change entities when iterating the C++ entities collection. (Strange things can happen... items can be missed, or be processed more than once, etc.)

If you need to change entities, then make an array copy to iterate:
ents = Sketchup.active_model.entities**.to_a** ents.class

Array

Although an exporter usually should not be making changes to the model.