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    Best way to get all Face's in model?

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    • E Offline
      exvion
      last edited by

      This code work:

       model = Sketchup.active_model
          faces = []
          faces.concat( model.entities.select{|e| e.is_a?( Sketchup;;Face ) }    )
          model.definitions.each { |d|
            next if d.image?
            faces.concat( d.entities.select{|e| e.is_a?( Sketchup;;Face ) } )
          }
      
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      • D Offline
        draftomatic
        last edited by

        @exvion said:

        This code work:

         model = Sketchup.active_model
        >     faces = []
        >     faces.concat( model.entities.select{|e| e.is_a?( Sketchup;;Face ) }    )
        >     model.definitions.each { |d|
        >       next if d.image?
        >       faces.concat( d.entities.select{|e| e.is_a?( Sketchup;;Face ) } )
        >     }
        

        It doesn't seem to be working for me. I put it as a method called get_face_array() inside a class called Tester:
        face_count_diff.JPG

        This is a 68.2MB model.

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        • thomthomT Offline
          thomthom
          last edited by

          faces = [] faces.concat( model.entities.select{|e| e.is_a?( Sketchup::Face ) } )

          Could be simplified to:

          faces = model.entities.select{|e| e.is_a?( Sketchup::Face ) }

          Thomas Thomassen — SketchUp Monkey & Coding addict
          List of my plugins and link to the CookieWare fund

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          • thomthomT Offline
            thomthom
            last edited by

            @draftomatic said:

            It doesn't seem to be working for me. I put it as a method called get_face_array() inside a class called Tester:

            It doesn't return the correct number because the code doesn't take into account instances.

            <span class="syntaxdefault">def number_of_faces<br />  model </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> Sketchup</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_model<br />  faces </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">entities</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">select</span><span class="syntaxkeyword">{|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|</span><span class="syntaxdefault"> e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault"> Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Face </span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">}.</span><span class="syntaxdefault">length<br />  model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">definitions</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">each </span><span class="syntaxkeyword">{</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">|</span><span class="syntaxdefault">d</span><span class="syntaxkeyword">|<br /></span><span class="syntaxdefault">    next if d</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">image</span><span class="syntaxkeyword">?<br /></span><span class="syntaxdefault">    next if d</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">count_instances </span><span class="syntaxkeyword">==</span><span class="syntaxdefault"> 0<br />    faces </span><span class="syntaxkeyword">+=</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">(</span><span class="syntaxdefault"> d</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">entities</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">select</span><span class="syntaxkeyword">{|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|</span><span class="syntaxdefault"> e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault"> Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Face </span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">}.</span><span class="syntaxdefault">length </span><span class="syntaxkeyword">*</span><span class="syntaxdefault"> d</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">count_instances </span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">  </span><span class="syntaxkeyword">}<br /></span><span class="syntaxdefault">end</span>
            

            Thomas Thomassen — SketchUp Monkey & Coding addict
            List of my plugins and link to the CookieWare fund

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            • thomthomT Offline
              thomthom
              last edited by

              Or - even easier if you can settle with SU7.1 or higher:

              model.number_faces

              Thomas Thomassen — SketchUp Monkey & Coding addict
              List of my plugins and link to the CookieWare fund

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              • thomthomT Offline
                thomthom
                last edited by

                Oh, wait - you actually need arrays of all the face entities?

                Thomas Thomassen — SketchUp Monkey & Coding addict
                List of my plugins and link to the CookieWare fund

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                • D Offline
                  draftomatic
                  last edited by

                  @thomthom said:

                  Oh, wait - you actually need arrays of all the face entities?

                  Well, I really just needed to iterate through all the Faces in the model... the array thing is just useful for testing.

                  Bah, I should've realized the instances issue... So your code in the 2nd post isn't quite right 😃

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                  • thomthomT Offline
                    thomthom
                    last edited by

                    @draftomatic said:

                    Bah, I should've realized the instances issue... So your code in the 2nd post isn't quite right 😃

                    It depends what you do with it...
                    If you need to count the faces you need to take into account all instances.

                    But if you need to just iterate over all faces you only need to process model.entities and the entities of each definition, even if a definition has multiple instances, a face in that definition is the same in each instance. It just exist in multiple locations.

                    Thomas Thomassen — SketchUp Monkey & Coding addict
                    List of my plugins and link to the CookieWare fund

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                    • D Offline
                      draftomatic
                      last edited by

                      @thomthom said:

                      @draftomatic said:

                      Bah, I should've realized the instances issue... So your code in the 2nd post isn't quite right 😃

                      It depends what you do with it...
                      If you need to count the faces you need to take into account all instances.

                      But if you need to just iterate over all faces you only need to process model.entities and the entities of each definition, even if a definition has multiple instances, a face in that definition is the same in each instance. It just exist in multiple locations.

                      As you saw a few minutes ago, I'm writing an exporter, and it doesn't keep Component information. I need every Face.

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                      • D Offline
                        draftomatic
                        last edited by

                        Closer, but still not working:

                        face_count_diff2.JPG

                        Here's the get_face_count() method I'm using:

                          def get_face_count()
                            count = 0
                            @model.entities.each { |e|
                              if (e.is_a?(Sketchup;;Face))
                                count +=1
                              end
                            }
                            
                            @model.definitions.each { |d|
                              next if d.image?
                              next if d.count_instances == 0
                              count += d.entities.select { |e|
                                e.is_a?(Sketchup;;Face)
                              }.length * d.count_instances
                            }
                            return count
                          end
                        
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                        • thomthomT Offline
                          thomthom
                          last edited by

                          hm... instances inside other instance might throw the count of...

                          I think you need to traverse the model in a tree like structure

                          <span class="syntaxdefault"><br />def&nbsp;process_model<br />&nbsp;&nbsp;walk_faces</span><span class="syntaxkeyword">(&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_model&nbsp;</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">end<br /><br />def&nbsp;walk_faces</span><span class="syntaxkeyword">(&nbsp;</span><span class="syntaxdefault">entities</span><span class="syntaxkeyword">,&nbsp;</span><span class="syntaxdefault">transformation&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">Geom</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Transformation</span><span class="syntaxkeyword">.new&nbsp;)<br />&nbsp;&nbsp;</span><span class="syntaxdefault">faces&nbsp;</span><span class="syntaxkeyword">=&nbsp;[]<br />&nbsp;&nbsp;for&nbsp;</span><span class="syntaxdefault">e&nbsp;in&nbsp;entities<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxkeyword">if&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Face&nbsp;</span><span class="syntaxkeyword">)<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">faces&nbsp;</span><span class="syntaxkeyword"><<&nbsp;</span><span class="syntaxdefault">e<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxkeyword">elseif&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Group&nbsp;</span><span class="syntaxkeyword">)<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">faces</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">concat</span><span class="syntaxkeyword">(&nbsp;</span><span class="syntaxdefault">walk_faces</span><span class="syntaxkeyword">(&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">entities</span><span class="syntaxkeyword">,&nbsp;</span><span class="syntaxdefault">transformation&nbsp;</span><span class="syntaxkeyword">*&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">transformation&nbsp;</span><span class="syntaxkeyword">)&nbsp;)<br />&nbsp;&nbsp;&nbsp;&nbsp;elseif&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">ComponentInstance&nbsp;</span><span class="syntaxkeyword">)<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">faces</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">concat</span><span class="syntaxkeyword">(&nbsp;</span><span class="syntaxdefault">walk_faces</span><span class="syntaxkeyword">(&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">definition</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">entities</span><span class="syntaxkeyword">,&nbsp;</span><span class="syntaxdefault">transformation&nbsp;</span><span class="syntaxkeyword">*&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">transformation&nbsp;</span><span class="syntaxkeyword">)&nbsp;)<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">end<br />&nbsp;&nbsp;end<br />&nbsp;&nbsp;faces<br />end<br /></span>
                          

                          (Untested - but something like this)

                          Thomas Thomassen — SketchUp Monkey & Coding addict
                          List of my plugins and link to the CookieWare fund

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                          • D Offline
                            draftomatic
                            last edited by

                            😍 😍 😍 😍

                            face_count_diff_works.JPG

                            Your code had a few lil typos; this one works:

                              def process_model()
                                return walk_faces( Sketchup.active_model.entities )
                              end
                            
                              def walk_faces( entities, transformation = Geom;;Transformation.new )
                                faces = []
                                entities.each { |e|
                                  if e.is_a?( Sketchup;;Face )
                                    faces << e
                                  elsif e.is_a?( Sketchup;;Group )
                                    faces.concat( walk_faces( e.entities, transformation * e.transformation ) )
                                  elsif e.is_a?( Sketchup;;ComponentInstance )
                                    faces.concat( walk_faces( e.definition.entities, transformation * e.transformation ) )
                                  end
                                }
                                return faces
                              end
                            

                            Thanks Tom, you're the best!

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                            • thomthomT Offline
                              thomthom
                              last edited by

                              There we go - got there in the end! 😄

                              Thomas Thomassen — SketchUp Monkey & Coding addict
                              List of my plugins and link to the CookieWare fund

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                              • D Offline
                                draftomatic
                                last edited by

                                One more question - I see you're messing with a transformation - if I ask a nested instance for, say, it's Face's vertices locations (assuming it's just a rectangle or something simple), will it give me the (globally) correct coordinates, or something relative to the Component's origin?

                                I guess ComponentDefinitions have entities, so I can ask for their locations. But ComponentInstances are transformed somewhere... I don't have much experience with transformations...

                                EDIT: Ah nevermind, I see now that you're carrying the transformation through each nesting of an instance. Gotcha.

                                Thanks again Tom

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                                • thomthomT Offline
                                  thomthom
                                  last edited by

                                  😉

                                  Had a feeling the transformation would be needed.

                                  Thomas Thomassen — SketchUp Monkey & Coding addict
                                  List of my plugins and link to the CookieWare fund

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                                  • S Offline
                                    soldatino
                                    last edited by

                                    I had the same problem, but I need to get the "material" of each face.
                                    So I had a lot of problems because the "material" is hereditary if there is (or not) in the groups of faces (or nested groups). So it is really difficult to get the tree of the materials of all the faces.
                                    So I wrote this inelegant recursive sub, and it works fine for me.

                                    def pov_ex()
                                       model=Sketchup.active_model 
                                       entities=model.entities
                                       entities.each do |entity|
                                            if entity.typename=="ComponentInstance"
                                                entity.explode
                                                pov_ex()
                                            elsif entity.typename=="Group"
                                                entity.explode
                                                pov_ex()
                                            end
                                       end
                                    end
                                    

                                    at the end, after material's extraction, I wrote a "model.abort_operation" so all the entities return to original state and are not corrupted by explode.
                                    But a question... this code works really slow, I'd like to find a better way....

                                    r3nDer tools

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                                    • thomthomT Offline
                                      thomthom
                                      last edited by

                                      @soldatino said:

                                      But a question... this code works really slow, I'd like to find a better way....

                                      There are two reasons your code is slow:

                                      1. You're comparing strings a lot. Don't use .typename to check for entity type. It's very slow. ( See more performance tips here: http://forums.sketchucation.com/viewtopic.php?f=180&t=25305#p217180 )
                                        Instead, test for its class: e.is_a?( Sketchup::Group )

                                      2. Exploding is very slow in SU. ( and if your script should fail at some point and halt - you're left with a broken model. )

                                      I have a plugin that transfer the group/component materials onto the faces with default materials - here's an extract from that plugin:

                                      <span class="syntaxdefault"><br />  def self</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">instance_materials_to_faces<br />    model </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> Sketchup</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_model<br />    model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">start_operation</span><span class="syntaxkeyword">(</span><span class="syntaxstring">'Instance Material to Faces'</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> true</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">    self</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">instance_material_to_faces</span><span class="syntaxkeyword">(</span><span class="syntaxdefault"> model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">selection</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> nil </span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">    model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">commit_operation<br />  end<br />  <br />  def self</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">instance_material_to_faces</span><span class="syntaxkeyword">(</span><span class="syntaxdefault"> entities</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> material </span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">    for e in entities<br />      if TT</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Instance</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">is</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault"> e </span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">        temp_material </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">(</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">?</span><span class="syntaxdefault"> e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material </span><span class="syntaxkeyword">;</span><span class="syntaxdefault"> material<br />        d </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> TT</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Instance</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">definition</span><span class="syntaxkeyword">(</span><span class="syntaxdefault"> e </span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">        self</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">instance_material_to_faces</span><span class="syntaxkeyword">(</span><span class="syntaxdefault"> d</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">entities</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> temp_material </span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxcomment"># Recursive call<br /></span><span class="syntaxdefault">        e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> nil<br />      elsif e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault"> Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Face </span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">        e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> material if e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">nil</span><span class="syntaxkeyword">?<br /></span><span class="syntaxdefault">        e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">back_material </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> material if e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">back_material</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">nil</span><span class="syntaxkeyword">?<br /></span><span class="syntaxdefault">      end<br />    end<br />  end<br /></span>
                                      

                                      Note that I have to custom methods here, not explained:
                                      TT::Instance.is?( e ) returns true if the entity is a Group or ComponentInstance
                                      TT::Instance.definition( e ) return the definition of a Group or ComponentInstance

                                      Thomas Thomassen — SketchUp Monkey & Coding addict
                                      List of my plugins and link to the CookieWare fund

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                                      • S Offline
                                        soldatino
                                        last edited by

                                        Thanks for your responce!
                                        Yes, teorically the strings compare is ever slow ... but here the difference is irrelevant more than in other languages, I checked a large file, and the part of the scanning and explode sub is the 99.99% of the working code of my parser.

                                        if entity.is_a?(Sketchup::ComponentInstance)
                                        and groups ...
                                        start 13:49:42 -> end 14:08:26

                                        if entity.typename=="ComponentInstance"
                                        and groups ..
                                        start 14:11:30 -> end 14:29:07

                                        In the second reason (explode is slow insted of get from material list) you are right 100%, but it is a bit complicated for me at this time (I am new about skup database).... but next time I must to improve at...
                                        I was hoping that there are something like these easy :
                                        group_parent.face .... group_parent.group ...
                                        but the only parent seems to be the entire list of materials...
                                        Thanks again, I apologize for my bad english.

                                        r3nDer tools

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                                        • thomthomT Offline
                                          thomthom
                                          last edited by

                                          @soldatino said:

                                          Yes, teorically the strings compare is ever slow ... but here the difference is irrelevant more than in other languages, I checked a large file, and the part of the scanning and explode sub is the 99.99% of the working code of my parser.

                                          It's a significant difference - check out the test data in this thread: http://forums.sketchucation.com/viewtopic.php?f=323&t=19576&st=0&sk=t&sd=a&start=15#p166698

                                          @unknownuser said:

                                          is_a? - 16.297c
                                          kind_of? - 16.141c
                                          class - 18.703c
                                          typename - 88.703c

                                          Thomas Thomassen — SketchUp Monkey & Coding addict
                                          List of my plugins and link to the CookieWare fund

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                                          • S Offline
                                            soldatino
                                            last edited by

                                            @thomthom said:

                                            ............
                                            2. Exploding is very slow in SU. ( and if your script should fail at some point and halt - you're left with a broken model. )

                                            ok! I changed my way and it seems work alot faster! (for my plugin converter 2 POV-Ray script).
                                            note: At this time I get only the color of the parent object(s) and not texture...

                                             def pov_find_faces(entities,tform,layername)
                                              entities.each do |entity|
                                                if entity.is_a?(Sketchup;;Face)
                                                  pov_write_face(entity, tform)
                                                elsif entity.is_a?(Sketchup;;Group)
                                                  if entity.material
                                                    if entity.material.color
                                                      $levelcolor[$level]=entity.material.color
                                                    else
                                                      $levelcolor[$level]=$levelcolor[$level-1]
                                                    end
                                                    if entity.material.alpha
                                                      $levelalpha[$level]=entity.material.alpha.to_s
                                                    else
                                                      $levelalpha[$level]=$levelalpha[$level-1]
                                                    end
                                                  else
                                                    $levelcolor[$level]=$levelcolor[$level-1]
                                                    $levelalpha[$level]=$levelalpha[$level-1]
                                                  end
                                                  $level+=1
                                                  pov_find_faces(entity.entities,tform * entity.transformation,entity.name)
                                                elsif entity.is_a?(Sketchup;;ComponentInstance)
                                                  if entity.material
                                                    if entity.material.color
                                                      $levelcolor[$level]=entity.material.color
                                                    else
                                                      $levelcolor[$level]=$levelcolor[$level-1]
                                                    end
                                                    if entity.material.alpha
                                                      $levelalpha[$level]=entity.material.alpha.to_s
                                                    else
                                                      $levelalpha[$level]=$levelalpha[$level-1]
                                                    end
                                                  else
                                                    $levelcolor[$level]=$levelcolor[$level-1]
                                                    $levelalpha[$level]=$levelalpha[$level-1]
                                                  end
                                                  $level+=1
                                                  pov_find_faces(entity.definition.entities,tform * entity.transformation,entity.name)
                                                end  
                                              end
                                              $level=$level-1
                                              #UI.messagebox($level.to_s)
                                            end
                                            
                                            

                                            r3nDer tools

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