Delete a list of components by their definitions.

[TNTDAVID]

**Hello Dan Rathbun and thank you for your help.

@dan rathbun said:

Then either you wrap what TIG showed you into a method, and call it 3 times from a loop:

How to write the loop?

I have done several tests and I still get this error message:

Error; # <SyntaxError; <main>; syntax error, unexpected '|'
For cname in ['CUBE', 'TOTO', 'LOLA'] do | cname |

                                         ^>

Then I tried your method by adding:

Cnames = ['CUBE', 'TOTO', 'LOLA']

The ruby console returns:

purge_comps

But nothing changes in SketchUp.

I have to move on from something obvious that I can not understand.

Thank you in advance for your help.**

[sdmitch]

@dan rathbun said:

Then either you wrap what TIG showed you into a method, and call it 3 times from a loop:

Error; # <SyntaxError; <main>; syntax error, unexpected '|'
For cname in ['CUBE', 'TOTO', 'LOLA'] do | cname |

                                         ^>

You are trying to define the variable "cname" twice in the same statement. delete the do | cname |

As usual Dan is right. You just need to wrap TIG's code with

["cube","toto","lola"].each{|name|
  match = /#{name}/i
.
.
.
}

[Dan Rathbun]

@sdmitch said:

You are trying to define the variable "cname" twice in the same statement. delete the do | cname |

MY BAD! I had a bad example (above.) [ Commented out that " do | cname |" part ]

@sdmitch said:

As usual Dan is right. You just need to wrap TIG's code with

["cube","toto","lola"].each{|name|
>   match = /#{name}/i
> .
> .
> .
> }

That will actually create a separate undo operation for each entity (and it's materials) and will be much slower.

@tntdavid said:

I have to move on from something obvious that I can not understand.

I gave you a complete working method at the bottom of that previous post !!!!!!

https://forums.sketchup.com/t/ruby-learning-resources-wikilists/22861
Get the old "Pick Axe" book and read it.

[Dan Rathbun]

@tntdavid said:

@tig said:

What made you think you need to diverge from my guidance ?

I used a array to "match" because there will be several different definitions to delete.

TIG is showing you how to purge ONEdefinition and it's materials.

@tntdavid said:

Your code works perfectly for a single definition, ...

No it does not. because you made 3 edits that make it NOT work properly.

CORRECTION: Actually I found 4 errors that made it not delete all the components or materials.
The second use of the Regexp was ! d.name =~ /#{name}/ (the regexp var is match.)
matsNOTtogo=[] was defined as matsNOYtogo=[], resulting in NameError
The comparison of back_material was conditional upon inclusion of front material in two statements.

@tntdavid said:

... what if we have "CUBE", "TOTO" and "LOLA" to delete?

First, learn how and why TIG's code works for ONE definition, then learn how to modify it for multiple definitions.

Then either you wrap what TIG showed you into a method, and call it 3 times from a loop:

for cname in ['CUBE','TOTO','LOLA'] # WHOOPS this not needed --> do |cname|
  purge_comp(cname)
end

... or you build a multi-match regular expression ( Regexp
cnames = ['CUBE','TOTO','LOLA'] match = /#{cnames.join('|')}/

Test file (SU2016):
CubeLolaToto.skp
"Color B04" and "Color J08" are unused.
"Color K03", "Color M06" are used by primitive faces.
"Material 2" is the leader color.

So here is a method with extra quirks:

• Returns false if array of cnames is empty.
• Short circuits and returns 0 if no definitions are found to delete.
• Reports both to console and message box number of definitions and materials purged.
• Returns number of definitions deleted.

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

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)
    }
  }
  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

If you absolutely must, you can call GC.start to ensure Ruby garbage collection runs.

[TNTDAVID]

@sdmitch said:

You just need to wrap TIG's code with
CODE: SELECT ALL
["cube","toto","lola"].each{|name|
  match = /#{name}/i
.
.
.
}

Great thanks sdmitch,

You allowed me to understand what Dan Rathbun was explaining to me.

@dan rathbun said:

https://forums.sketchup.com/t/ruby-lear ... ists/22861
Get the old "Pick Axe" book and read it.

Thanks for the Dan link, I will follow your advice.

Here is the TIG method, which works for several definitions:

  ["cube","toto","lola"].each{|name|
  match = /#{name}/i
  model=Sketchup.active_model 
  defstogo=model.definitions.find_all{|d| d.name =~ match } 
  matstogo=[]
  defstogo.each{|d|  
  d.instances.each{|i|
  matstogo << i.material unless matstogo.include?(i.material)
  }
  d.entities.each{|e|
  matstogo << e.material unless matstogo.include?(e.material)
( matstogo << e.back_material unless matstogo.include?(e.material) ) if e.is_a?(Sketchup;;Face)
}
}
  matstogo.compact!
  matstogo.uniq!

  defsnottogo=model.definitions.find_all{|d| ! d.name =~ /#{match}/ }
  matsnottogo=[]
  defsnottogo.each{|d|
  d.instances.each{|i|
  matsnottogo << i.material unless matsnottogo.include?(i.material)
  }
  d.entities.each{|e|
  matsnottogo << e.material unless matsnottogo.include?(e.material)
( matsnottogo << e.back_material unless matsnottogo.include?(e.material) ) if e.is_a?(Sketchup;;Face)
}
}
  matsnottogo.compact!
  matsnottogo.uniq!
  matstogo.clone.each{|e|
  matstogo.delete(e) if matsnottogo.include?(e)
}
  model.start_operation('Purger', true)
  defstogo.each{|d| d.entities.clear! }
  matstogo.each{|m| model.materials.remove(m) }
  model.commit_operation
}

With your help I reach my goals and I discover more and more the Ruby.

Thank you all for your help.

[Dan Rathbun]

@tntdavid said:

Here is the TIG method, which works for several definitions:

Your implementation still has a few errors.

David, I say again, that I gave you the code for a complete corrected method above.
It defines a method name purge_comps(*cnames)

[TNTDAVID]

**Sorry Dan, but I can not seem to make your method work.

In your method, how to integrate "CUBE", "TOTO" and "LOLA"?

Thank you in advance for your help.

David**

[TNTDAVID]

**Sorry Dan, I had not paid attention to your instructions in the code:

@dan rathbun said:

To test:

purge_comps('CUBE','TOTO','LOLA')

... or:

del = ['CUBE','TOTO','LOLA']

purge_comps(del)

Your method works very well and offers new benefits.

I noticed a small problem:

How to avoid deleting the texture of 'CUBE', if it is used elsewhere in SketchUp?

Thanks in advance for your help.**

[Dan Rathbun]

@tntdavid said:

Your method works very well and offers new benefits.

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

@tntdavid said:

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.**