Delete a list of components by their definitions.

Dan Rathbun

Your method works very well and offers new benefits.

It is TIG's method with a few extra "bells and whistles".

I noticed a small problem:
How to avoid deleting the texture of 'CUBE', if it is used elsewhere in SketchUp?

I'll look at it today a bit and see if there is an issue.

EDIT: Okay, YES I see the issue. The method does not check the model level entities collection for used materials (on primitive entity objects.)

Dan Rathbun


# To test;
# purge_comps('CUBE','TOTO','LOLA')
# ... or;
# del = ['CUBE','TOTO','LOLA']
# purge_comps(del)
#
# ver; 2.0

def purge_comps(*cnames)
  #
  return false if cnames.empty?
  cnames.flatten!
  #
  match = /#{cnames.join('|')}/
  #
  model=Sketchup.active_model
  # collect matching definitions
  defstogo=model.definitions.find_all{|d| d.name =~ match }
  return 0 if defstogo.empty?
  # collect materials.
  matstogo=[]
  defstogo.each{|d|
    # first used by instances
    d.instances.each{|i|
      matstogo << i.material unless matstogo.include?(i.material)
    }
    # now used by its entities
    d.entities.each{|e|
      matstogo << e.material unless matstogo.include?(e.material)
      ( matstogo << e.back_material unless matstogo.include?(e.back_material) ) if e.is_a?(Sketchup;;Face)
    }
  }
  matstogo.compact!
  matstogo.uniq!
  # now check if materials used elsewhere
  defsNOTtogo=model.definitions.find_all{|d| ! d.name =~ match }
  # collect materials.
  matsNOTtogo=[]
  defsNOTtogo.each{|d|
    # first used by instances
    d.instances.each{|i|
      matsNOTtogo << i.material unless matsNOTtogo.include?(i.material)
    }
    # now used by its entities
    d.entities.each{|e|
      matsNOTtogo << e.material unless matsNOTtogo.include?(e.material)
      ( matsNOTtogo << e.back_material unless matsNOTtogo.include?(e.back_material) ) if e.is_a?(Sketchup;;Face)
    }
  }
  # now used by model entities
  model.entities.each{|e|
    matsNOTtogo << e.material unless matsNOTtogo.include?(e.material)
    ( matsNOTtogo << e.back_material unless matsNOTtogo.include?(e.back_material) ) if e.is_a?(Sketchup;;Face)
  }
  matsNOTtogo.compact!
  matsNOTtogo.uniq!
  # now reduce matstogo as necessary...
  matstogo.clone.each{|e|
    matstogo.delete(e) if matsNOTtogo.include?(e)
  }
  #
  defsgone = defstogo.size
  matsgone = matstogo.size
  # start and operation to ensure Garbage Collection works...
  model.start_operation('Purger', true)
  # now delete the selected entities
  defstogo.each{|d| d.entities.clear! }
  # now delete the unneeded materials
  matstogo.each{|m| model.materials.remove(m) }
  # clear the arrays of references to deleted objects;
  matstogo.clear
  defstogo.clear
  # commit
  model.commit_operation
  msg = "#{defsgone} definitions purged\n#{matsgone} materials purged"
  puts msg
  UI.messagebox(msg,MB_OK)
  return defsgone
end

TNTDAVID

**Thanks for your reactivity Dan.

Your solution works in the most by cases, but not all the time.

The texture applied to TOTO should not be removed because it is used by the 4 Rectangle to Left:

This mistake this product on my Click-Cuisine 2 furniture, and therefore makes the method unusable.

Here's the SKP file:

CubeLolaToto2.skp

If you test your code on other examples the problem will not exist!

For this reason the problem is strange and requires an investigation.

Thank you in advance for your help.

David**

Dan Rathbun

@tntdavid said:

For this reason the problem is strange and requires an investigation.

I agree. Sounds like a good learning experience for you.
I'll let you do the investigation, and fix it.

@tntdavid said:

Thank you in advance for your help.

I've given you enough help for now.

Your turn to do some of the work.

TNTDAVID

**Hello,

You are right Dan, for the moment I still have not found a solution.

I'm stubborn and I'd end up finding it!

Thanks for your example Dirven

I have tested your code and the components are all removed from the SketchUp scene but nothing is purged.

Is this normal?

Edite:

The Ruby console returns this message when I trigger your method.

Error; #<NameError; undefined local variable or method `i' for Teste;Module>
C;/Users/David/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/TNT_Teste/logic.rb;60;in `block in purge_comps_n_mats'
C;/Users/David/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/TNT_Teste/logic.rb;56;in `each'
C;/Users/David/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/TNT_Teste/logic.rb;56;in `purge_comps_n_mats'
C;/Users/David/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/TNT_Teste/logic.rb;75;in `purge_comps'
C;/Users/David/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/TNT_Teste/logic.rb;85;in `block in singleton class'
SketchUp;1;in `call'

Thank you**

driven

edited my example...

line 55 i is now item...

john

driven

another way is to Hash the materials and set values for each...

  def purge_comps_n_mats(*args)
  model  = Sketchup.active_model
  defs   = model.definitions
  sel    = model.selection
  view   = model.active_view
  ents   = model.active_entities
  mats   = model.materials
  # add a hasj for materials and entities
  mats_h = Hash[mats.zip([1] * mats.size)]

  # this means you don't have to get Regexp right yourself
  names = Regexp.union(args)
  # this is similar to defs.to_a.dup.flatten
  list = defs.find_all { |d| d }
  # we will still only use one operation as v17 will error
  model.start_operation('mats')


  list.each do |defn|
    defn.instances.each do |i|

       ######################
       # optional 'showtime' for testing
	sel.add(i)
	view.refresh
	sleep 0.2
	######################

      dents = defn.entities
      if defn.name =~ names
        # get rid of the comps checking their materials
         mats_h[defn.material] = 3 unless defn.material.nil?
         mats_h[i.material] = 3 unless i.material.nil?
         dents.to_a.each do |item|
          mats_h[item.material] = 3 if item.respond_to? ;material
          mats_h[item.back_material] = 3 if item.respond_to? ;back_material
        end
	# delete the instance
	ents.erase_entities(i)
      else
        mats_h[defn.material] = 2 unless defn.material.nil?
        mats_h[i.material] = 2 unless i.material.nil?
        dents.to_a.each do |item|
          mats_h[item.material] = 2 if item.respond_to? ;material
          mats_h[item.back_material] = 2 if item.respond_to? ;back_material
        end
      end
    end
  end

  ents.to_a.each do |item|

		######################
		# optional 'showtime' for testing
		sel.add(item)
		view.refresh
		sleep 0.2
		######################

    mats_h[item.material] = 2 if item.respond_to? ;material
    mats_h[item.back_material] = 2 if item.respond_to? ;back_material
  end

   mats_h.each { |k, v| mats.remove(k) unless k.nil? || v != 3 }

  model.commit_operation #
end

purge_comps_n_mats('CUBE', 'TOTO', 'LOLA')

john

TNTDAVID

**Thank you driven, your solution works well but encounters the same problem as that of TIG enhanced by Dan.

The materials applied to the "subcomponents" are not seen by the 2 methods.

To be more precise, here is an example in image:

The goal is that the texture "CUBE" is not deleted because it is used by "Nested component".

Perhaps the solution would be to ask both methods to explore all the subcomponents in SketchUp and collect the materials so as not to delete them?

How to write this in ruby?

I could find a solution by modifying the components of Click-Cuisine 2, but the ideal would be to solve the problem with the code.

If you want to try, here is the SKP file of the example:

CUBE.skp

Thank you**

driven

you must have changed something because it does work for me...

did you read the code?

it collects all nested materials from 'everything' before removing any materials...

click image to see gif:

attach your test code...

john

TNTDAVID

**Yes I read your code driven and am surprised that it does not work for me.

You are right in my last SKP example, your method works.

Make a test with this example:

CubeLolaToto2.skp

You will see that the texture of "TOTO" will be deleted.**

TNTDAVID

**I can not understand why the texture applied to "TOTO" is purged.

If I go through "purge_unused" the texture "TOTO" is not deleted.

So I'll get around the problem with another method.

To delete a list of materials, I can write this:

mat_names = ['TOTO','LOLA','CUBE']
materials = Sketchup.active_model.materials
mat_names.each{|mnj| materials.remove(mnj)}

Can we do the same with "purge_unused", so that the unused materials of the list are deleted?

Thank you for your help.**