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    Best way to get all Face's in model?

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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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