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    Iterating over the faces of a component - without exploding

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    • T Offline
      talig
      last edited by

      Yeah, I think I've tried that, though only visually.
      I'm not sure they match, but visual testing counts for nothing...
      I'll give it a go, we'll see what the conclusions are πŸ˜„

      Avatar: all rights reserved to Bryan Eppihimer

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      • Chris FullmerC Offline
        Chris Fullmer
        last edited by

        @thomthom said:

        I was thinking more like selection.to_a.sort
        Is there a .sort method for a string?

        Yeah, but that's the thing. There is no selection.to_a.sort method available. But you can sort them alphabetically if you turn all the array items into strings selection.to_a.to_s.sort. Then it sorts them alphabetically.

        But of course it was decided this won't help here. But maybe elsewhere in the future.

        Chris

        Lately you've been tan, suspicious for the winter.
        All my Plugins I've written

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        • Chris FullmerC Offline
          Chris Fullmer
          last edited by

          I'm stilll curious Talig, are looking to find all the face normals? OR looking to find square areas? As Thom and Fredo have mentioned, the different rotation and scale of each group and component need to be taken into account.

          Chris

          Lately you've been tan, suspicious for the winter.
          All my Plugins I've written

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          • thomthomT Offline
            thomthom
            last edited by

            @chris fullmer said:

            Yeah, but that's the thing. There is no selection.to_a.sort method available. But you can sort them alphabetically if you turn all the array items into strings selection.to_a.to_s.sort. Then it sorts them alphabetically.

            hmm? .to_s returns an array. And for array objects there's a .sort method. I'm sure I've used this.

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

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            • Chris FullmerC Offline
              Chris Fullmer
              last edited by

              But it depends what is in the array. Sketchup does not define a heirarchy for how to sort entities like FaceObjects, Component Objects, etc. So the .sort method breaks when put on an array full of items that ruby can't decide how they should be sorted.

              I thought that Sketchup.active_model.selection.to_a.to_s.sort would turn the selection into an array, and then turn each objectID into a separate string and then alphabetize all the strings. But thats not quite right. It turns the whole returned array into a single string, and therefore .sort doesn't change anything anyhow.

              So to get around it, you have to make an array of all entitiesID's turned into strings. Something like:
              sel = Sketchup.active_model.selection selection_strings = [] sel.each do |e| selection_strings << e.to_s end puts selection_strings.sort
              That will effectively create an array of strings, instead of unsortable ObjectIDs. The strings can then be alphabetized by .sort, which makes it much easier to compare - even though the entire idea was thrown out a few posts ago. But if you wanted to sort them, this does work.

              Chris

              Lately you've been tan, suspicious for the winter.
              All my Plugins I've written

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              • fredo6F Offline
                fredo6
                last edited by

                @talig said:

                Fredo - I'm a female πŸ˜„
                About the coordinates: What you're saying is interesting. I assumed I get the absolute model coordinates in any case. That's obviously true in the exploded case, but possibly the cause of the problem in what I'm trying to do. I'll check it out. Thanks! πŸ‘ (and thanks for the to_a tip!)

                I already have everything else up and running, so thanks for trying to help - but really, no call for that.
                All I need is an array of faces equivalent to that of an exploded component. Nothing more, nothing less. πŸ˜„

                Sorry for the confusion. I missed your splendid avatar.
                What I wanted to say is that if you have instances of a component, each containing one face, you will always get the same face object for each one when scanning the model: this is the face which is stored in their Definition. The only way to make a distinction is to use the transformation property of each instance (when you explode you have 2 components, each with its own definition). So, in short, don't expect to get a list of faces alone, but rather a list of couple [faces, transformation].

                Fredo

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                • T Offline
                  talig
                  last edited by

                  Fredo,
                  Can't I just apply the transformation and save just the transformed face?
                  Because that's what I thought I'd do πŸ˜„

                  • Tali

                  Avatar: all rights reserved to Bryan Eppihimer

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                  • thomthomT Offline
                    thomthom
                    last edited by

                    But then you'd apply it to all instances, won't you? Since that face belongs to the definition. This could be what's throwing your calculations off.

                    What kind of calculations is it that you do?

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

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                    • AdamBA Offline
                      AdamB
                      last edited by

                      @talig said:

                      Jim - Thanks.
                      I'm using raytest. But I need a fine-grain detail.
                      See, if I have a component - raytest will return the component as an answer for the ray hitting any of it's faces. I need to know which face in that component was intersected. More accurately, I need to know that a certain face that should have been intersected, isn't - because it's shaded.

                      Thomthom - any thoughts?

                      Thanks again guys,

                      • Tali

                      So I've been lurking on this thread and the bit I don't understand is that Model#raytest does return the Face you pick (along with the Component/Group parts hierarchy). Isn't that what you want?

                      Developer of LightUp Click for website

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                      • T Offline
                        talig
                        last edited by

                        AdamB,
                        No, the calculation that I'm doing is in the reversed direction. I do not want to raytrace the whole model and see what I hit,
                        I want to select a face (or a few faces) and say how much of it is lit. (i.e. out of the set of rays that should hit it, how many actually hit it first)

                        This is working great, as already stated, for non-grouped/componented selections...

                        Avatar: all rights reserved to Bryan Eppihimer

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