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    [Plugin] QHull

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    • A Offline
      avariant
      last edited by

      I haven't tested with V6... I suspect it's not compatible because of I'm using some SU7 flags on the start_operation command. I'll update that to do a version check.

      Anyway, as I wrote previously, you can either use one of the Small, Medium, etc commands to generate random shape, or select something and use the Selection entry.

      When using selection, it won't always generate a result. If the selection is all on a single plane, you won't get anything out.

      EDIT: I updated it to do a version check for SU7 vs SU6. Tested on SU6.

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      • pilouP Offline
        pilou
        last edited by

        Yes! That whas that! Don't works with the V6 😉
        Works fine with the v7! ☀


        qhull.jpg

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

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        • A Offline
          avariant
          last edited by

          It should work now with V6.

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          • pilouP Offline
            pilou
            last edited by

            Yes works now for the v6 😉
            "Half" start size is very very very little! Maybe like 5 pixels!!! 😮


            VORO.jpg

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

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            • T Offline
              tomasz
              last edited by

              Can someone enlighten me, please? What it the purpose of having such a random geometry?
              ❓

              Author of [Thea Render for SketchUp](http://www.thearender.com/sketchup)

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              • halroachH Offline
                halroach
                last edited by

                It's a very nice plugin!
                It would be even nicer if it were more stable and responsive with user selected points to create the different shapes.
                I wasn't able to create any shapes out of user selected points. How do I select points? do I select lines? or points created with one of the point plugins? (that didn't work for me either...).
                This plugin can have great potential...

                Very Nice!

                FlexTools - Super Quick Windows, Doors, Slats...

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                • S Offline
                  skybluessy
                  last edited by

                  thanks for the developer,very nice

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                  • C Offline
                    craigbic
                    last edited by

                    YES!!!! I have been really.....really....REALLY needing this lately! I can't wait to try this as soon as I am done writing this reply. I'll let you know how it goes.

                    @unknownuser said:

                    Can someone enlighten me, please? What it the purpose of having such a random geometry?

                    Tomasz,

                    I wouldn't call it "random geometry" as the "randomness" would depend on the point cloud used as the basis for the Voronoi diagram but rather call it "mathematically generated geometry". 3D Voronoi structures (2D Voronoi diagrams aside) are used in cellular-level research, bone fatigue studies, and experimental cellular architecture.

                    Checkout the Sketchup Graphics Blog at http://sketchupgraphics.com

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                    • C Offline
                      craigbic
                      last edited by

                      Well, there are a few snags but I am still VERY pleased with this large chunk of progress. Kudus, avariant! This is a major step forward in the Qhull/Voronoi plugin development.

                      Has ANYBODY been able to get the "selection" versions of Voronoi, convex, Delaunay, or half working at all? I have been unable to do so under any circumstance regardless of point cloud size or attitude in SU6. I use SU6 at work and SU7 at home so I haven't tried it in SU7 yet. I generated lsystem point clouds of various sizes and was totally unable to get them to work. Then I tried various hand-made point clouds, ones generated from sandbox meshes, and even point clouds generated from 2D Voronoi diagrams and all did not work (see error message pic).

                      On the positive side, all of the operations based on points generated by rbox work just fine and it is really nice to have them working within SU! I guess for now, to generate 3D Voronoi geometry from my own points, I'll have to follow my own procedure as outlined in this post

                      I feel like we're almost there and it will only take a slight nudge to get this totally working.....I am still quite excited about this.


                      lsystem point cloud


                      Error message I get when using a selection of points

                      Checkout the Sketchup Graphics Blog at http://sketchupgraphics.com

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                      • pilouP Offline
                        pilou
                        last edited by

                        @unknownuser said:

                        Has ANYBODY been able to get the "selection" versions of Voronoi, convex, Delaunay, or half working at all?

                        In fact yes ☀
                        You must make a group before launch the Qhull plug 😉
                        Half works also but result is like 111 pixel at the origin so you must rescale the result 🤓

                        For your points I don't know yet but I suppose if you make a group maybe that works too 😉


                        voro2.jpg

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

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                        • A Offline
                          avariant
                          last edited by

                          OOOhhhhh.... oversight on my part!

                          When examining the standard SU 'model', there usually aren't construction points. Everything is edges and faces. So, I just search for all the edges and use the starting vertex for each edge (to avoid duplicate points, I don't use the end). It never occurred to me to also search for construction points, but I can see how that would be useful!

                          To see how the selection part works now, create a random convex shape. Then select the component, and do voronoi on selection. There you will see how it works. In the meantime, I'll update it to capture construction points also.

                          As far as purpose.... well... it's artistic, right? 😆
                          Actually, convex hull can have a legitimate purpose. If you have a complex model, do a convex hull selection on it, you'll get a sort of 'shrink wrap' shell of the entire model. I'm sure the others have legitimate purposes too. 😉

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                          • A Offline
                            avariant
                            last edited by

                            Add the actual plugin! (D'oh)

                            EDIT: Updated to work for SU6
                            EDIT 5/14/2009: Updated to work with ConstructionPoints


                            QHull.zip

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                            • A Offline
                              avariant
                              last edited by

                              Fixed for using Construction Points.

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                              • W Offline
                                watkins
                                last edited by

                                A tutorial or two to demonstrate how to use this plugin would be nice.

                                Regards,
                                Bob

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                                • C Offline
                                  craigbic
                                  last edited by

                                  YES...YES.....YES!!!!! Everyhing is working now! Thank you especially for the update for use with construction points. I tried every variant I could think of, lsystem point clouds, sandbox mesh grids, convex geometry groups....it all worked.....flawlessly! It took awhile but as I told other members in other related posts.....somebody in this terrific community forum will come in and save the day!

                                  Thank you avariant!!! 😄

                                  Checkout the Sketchup Graphics Blog at http://sketchupgraphics.com

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                                  • A Offline
                                    avariant
                                    last edited by

                                    My pleasure. It was fun, and I've always been a fan of the 3D Voronoi shapes. 😄

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                                    • MALAISEM Offline
                                      MALAISE
                                      last edited by

                                      👍 👍 😄 👍

                                      MALAISE

                                      La Connaissance n'a de valeur que partagée

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                                      • halroachH Offline
                                        halroach
                                        last edited by

                                        I haven't been able to generate any shapes with selected shapes, or with selected construction points, if in a group/components/outside a group/component. I get the following errors:
                                        "qhull generated empty results"
                                        "qhull failed to generate valid results"

                                        ideas?

                                        FlexTools - Super Quick Windows, Doors, Slats...

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                                        • A Offline
                                          avariant
                                          last edited by

                                          If your points are all on the same plane, then you won't get any results.

                                          To ensure it works at all:
                                          1.Create new, empty scene.
                                          2. Plugins->Qhull->Convex->Medium
                                          3. A convex shape should be created. Select it.
                                          4. Plugins->Qhull->Voronoi->Selection(Free)
                                          5. A spiky shape should be created.

                                          If all that works, then the problems is your input data (ie model / points).

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                                          • A Offline
                                            avariant
                                            last edited by

                                            I honestly don't know the math, but A LOT of regular shapes, like cubes, planes, etc, don't generate valid voronoi results. They may still generate results from the other options, and will often work if you choose Selection (Sphere) or Selection (Box). I don't know why... math, right? 😉

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