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    [Plugin] FredoTools::Convexify - v1.0 - 25 Feb 15

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    • A Offline
      Anton_S
      last edited by

      @fredo6 said:

      That won't be easy from the code itself and anyway it heavily relies on Sketchup framework to describe geometry (faces, edges, etc....). The best is that I provide you with a short description of the algorithm which could be adapted to your geometrical frameworks in MSPhysics and underlying engine.

      Thank you Fredo. It seems complicated, but I'm fairly sure its possible to put together a C extension out of this. I'll look into the source and try to break it down. Otherwise, I could stick with Ruby-SketchUp implementation.

      Thanks again,
      Anton

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      • A Offline
        Anton_S
        last edited by

        I decided to do a little test and got a generation error with that camel, which I got at 3dwarehouse.

        @unknownuser said:

        Date: 27-Feb-15 01:54:52
        An error occurred in Convexify 3D Shapes
        Error while processing Convexify

        wrong argument type (expected Sketchup::Face)

        body_Lib6Solid.rb: 1212 -- reversed_in?
        body_Lib6Solid.rb: 1212 -- block in solid_transfer_section_faces
        body_Lib6Solid.rb: 1205 -- each
        body_Lib6Solid.rb: 1205 -- solid_transfer_section_faces
        body_Lib6Solid.rb: 1034 -- solid_split
        body_Lib6Solid.rb: 909 -- solid_split_robot
        body_Lib6Solid.rb: 560 -- robot_execute_protected
        body_Lib6Solid.rb: 506 -- robot_execute
        body_Lib6Solid.rb: 482 -- block in convexify
        Lib6Operation.rb: 325 -- call
        Lib6Operation.rb: 325 -- step_geometry
        Lib6Operation.rb: 286 -- block in yield?
        SketchUp: 1 -- call

        Generation Options:

        Put the Convex shapes on LAYER: Fredo6_Convexify
        Tolerance Concavity: 0 deg.
        Animation algorithm: NO

        A bit different error shows up when I generate with Animation set to 0.2s.

        Edit: Adding next if edge0.faces.size != 2 to body_lib6Solid.rb, line 1210 (after break unless edge0) seems to fix that initial error, and generate convex decomposition without problems. However, changing tolerance makes a different error to appear. Maybe you could look into it if you have time...


        camel.skp

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        • fredo6F Offline
          fredo6
          last edited by

          Anton,

          Thanks for pointing to this bug.

          Actually, the correction is to replace line 1207 (an error of too quick copy / paste!)

          		#ledges = face.edges.sort { |e1, e2| e2.length <=> e1.length }
          		ledges = ledges.sort { |e1, e2| e2.length <=> e1.length }
          
          

          I'll fix and re-release, after looking at the Camel

          Fredo

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          • A Offline
            Anton_S
            last edited by

            Thanks. I was kind of wondering whether multiple convex shapes could be combined. The algorithm generates too much convex shapes for complex models. It would be nice to have a cleanup method which then combines final convex groups if they together are still a convex shape.

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            • pilouP Offline
              pilou
              last edited by

              I am disapointed that the Pilou's model is not a real solid! ๐Ÿ’š
              It should because it has an external closed skin! ๐Ÿ˜‰
              Sure internal is maybe some convoluted! ๐Ÿ˜„

              So next plug will be to tranform it in a real solid! ๐Ÿ˜‰

              In any way another Cristallographic task! ๐Ÿ˜ฒ ๐Ÿ‘ ๐Ÿ˜Ž

              Frenchy Pilou
              Is beautiful that please without concept!
              My Little site :)

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              • fredo6F Offline
                fredo6
                last edited by

                @anton_s said:

                Thanks. I was kind of wondering whether multiple convex shapes could be combined. The algorithm generates too much convex shapes for complex models. It would be nice to have a cleanup method which then combines final convex groups if they together are still a convex shape.

                Anton,

                This would be another type of decomposition (say a "blockify" method). Convexify does the job, and none of the small piรจces can be combined to form a bigger convex piece. In the camel, many of the mesh quads have a diagonal that is a concave edge.

                For collision, I guess that what you need is an approximate block decomposition that would be visually sufficient to give the impression of contact.

                Fredo

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                • fredo6F Offline
                  fredo6
                  last edited by

                  @pilou said:

                  So next plug will be to tranform it in a real solid! ๐Ÿ˜‰

                  Did you try Solid Inspector by thomthom. I think TIG also has a plugin for that.

                  Fredo

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                  • pilouP Offline
                    pilou
                    last edited by

                    I will try that! ๐Ÿ˜„

                    Frenchy Pilou
                    Is beautiful that please without concept!
                    My Little site :)

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                    • D Offline
                      dkluger
                      last edited by

                      I am having a problem with Convexify. I am running SU15 Make. I have this tool on another computer and it runs seamlessly. I can't figure out why it won't work on this computer.

                      Running the tool seems to work at first where I get prompted to use the whole model (if nothing is selected) and then I can select the convex decomposition parameters. Once I click "OK" the green hour glass comes up, but then nothing happens. The second I move my mouse, the hour glass changes to a pointer as if nothing ever happened. Any clue to what's going on here?

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                      • M Offline
                        meak
                        last edited by

                        hello,
                        Unfortunately, I have exactly the same problem.
                        I work with pro skecthup 2015

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                        • fredo6F Offline
                          fredo6
                          last edited by

                          Thanks for signaling.
                          This is a bug introduced by LibFredo6 6.8. Sorry for inconvenience.

                          Please install LibFredo6 6.8c, now published on the PluginStore.

                          Fredo

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                          • M Offline
                            meak
                            last edited by

                            speed and efficiency
                            a big applause
                            thank you a lot
                            is it possible to keep the exploded model?

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                            • pilouP Offline
                              pilou
                              last edited by

                              Will be fine if we can exit with an actual position of the animation Explode Convexify colored view!
                              (with colors or not)
                              Or does exist a trick ?
                              (sure I can use other thing like Explode-view, Animator, ... but that give not the colors etc...

                              GIF_fine.gif

                              Frenchy Pilou
                              Is beautiful that please without concept!
                              My Little site :)

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                              • pilouP Offline
                                pilou
                                last edited by

                                Seems there is a glitch!
                                convex_glitch.jpg


                                Glitch_Convex_V6.skp

                                Frenchy Pilou
                                Is beautiful that please without concept!
                                My Little site :)

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                                • gillesG Offline
                                  gilles
                                  last edited by

                                  It's seems to be relative with angular tolerance.

                                  Glitch_Convex_V6.png

                                  " c'est curieux chez les marins ce besoin de faire des phrases "

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                                  • gillesG Offline
                                    gilles
                                    last edited by

                                    But I may be wrongโ€ฆ

                                    Glitch_Convex.png

                                    " c'est curieux chez les marins ce besoin de faire des phrases "

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                                    • pilouP Offline
                                      pilou
                                      last edited by

                                      Even more evident for 2 simple circles extruded! ๐Ÿ˜ฎ
                                      Dashed lines should be the good ones!

                                      simple_cercle.jpg

                                      Frenchy Pilou
                                      Is beautiful that please without concept!
                                      My Little site :)

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                                      • fredo6F Offline
                                        fredo6
                                        last edited by

                                        Pilou,

                                        This is normal.

                                        The corresponding vertices of the inner and outer circles are not 'aligned', that is, the line joining two corresponding vertices does not go through the common center of the circles.

                                        This is a frequent issue when drawing co-centric circles. Because they are made of segments, it may important to keep them 'aligned'. I must say that the Circle tool does not help too much for that.

                                        If Convexify was 'following' your edges in the current model, the pieces would not be convex or would have to be divided in smaller chunks.

                                        Fredo

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                                        • pilouP Offline
                                          pilou
                                          last edited by

                                          That is some ennoyous! ๐Ÿ˜„
                                          So we must found a trick!
                                          Because make drawings with concentric Circles or Arc-circle are very commune! ๐Ÿค“

                                          Frenchy Pilou
                                          Is beautiful that please without concept!
                                          My Little site :)

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                                          • pilouP Offline
                                            pilou
                                            last edited by

                                            Ok I found one ๐Ÿ˜„

                                            Drawing concentric circles on the same alignment! ๐Ÿ˜„

                                            here the red axe!

                                            GIF_same_align.gif

                                            PS Now if you can exit during the animation for keept the position of objects & colors
                                            that will be cool! ๐Ÿ˜„

                                            Frenchy Pilou
                                            Is beautiful that please without concept!
                                            My Little site :)

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