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    SU models of George Hart's geometric sculptures

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    • pilouP Offline
      pilou
      last edited by

      @unknownuser said:

      I've been using TopMod (or trying to use it) for one hour or so

      Yes it's not intuitive like SU πŸ˜‰
      A big training is necessary before make that you want! πŸ€“

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

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      • G Offline
        guzman tierno
        last edited by

        Back to the topic,

        Here's one more,
        this one it's only inspired by Hart's sculptures
        but I invented it. "Giraffe".
        whatever you want to say about or do with them is greatly appreciated.

        (I attached also a variation of "Knot Structured", I changed the colors to make it a bit more similar to the original).

        As usual: images and skp files ...


        giraffe2.jpg


        giraffe.jpg


        knot-structured2.jpg


        giraffe2.skp


        giraffe.skp


        knot structured.skp

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        • H Offline
          HFM
          last edited by

          Love your models Guzman, hope you don't mind πŸ˜„

          [attachment=0:1smwlc0g]<!-- ia0 -->001.jpg<!-- ia0 -->[/attachment:1smwlc0g]

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          • G Offline
            guzman tierno
            last edited by

            @hfm said:

            hope you don't mind πŸ˜„

            Really cool, I like it

            I didnt recognize it when I first saw it,
            nice work HFM.

            What did you use to render it ?

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            • H Offline
              HFM
              last edited by

              Hypershot πŸ˜„

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              • ArcA Offline
                Arc
                last edited by

                Thank you Pilou and guzman.
                I have played Topmod all day, it's very cool stuff, and I rendered in hypershot.

                http://1.bp.blogspot.com/_xcjlegqdIuM/SUpGnI-cNnI/AAAAAAAAAMk/t5wuEGd0DTA/s320/untitled.84.jpg

                http://2.bp.blogspot.com/_xcjlegqdIuM/SUpErrPrnKI/AAAAAAAAAMU/wGnlV_fCjlg/s320/untitled.86.jpg

                http://1.bp.blogspot.com/_xcjlegqdIuM/SUpEg73tUyI/AAAAAAAAAMM/SIhrdfLycUg/s320/untitled.89.jpg

                http://3.bp.blogspot.com/_xcjlegqdIuM/SUpEGgXIGCI/AAAAAAAAAL8/WdMxMNV8ZtA/s320/untitled.94.jpg

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                • G Offline
                  guzman tierno
                  last edited by

                  Cool stuff, Arc

                  after seeing your drawings I decided I'm gonna have to give TopMod another try,
                  thanks for sharing.

                  guzman.

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                  • G Offline
                    guzman tierno
                    last edited by

                    If there is anybody interested in modelling geometric sculptures, I wrote I brief tutorial that illustrates one of the possible methods to obtain this kind of models.

                    First. Choose a somewhat symmetrical polihedron as a basis for your model.
                    For instance: Platonic, Archimedean and Catalan Solids they all work fine.
                    They're quite easy to draw but you may of course download them from the 3DWH.
                    (Interestingly engough all those solids can be modelled without ever having to type in any measures for sides or angles! Sketchup is so powerful).

                    In this brief tutorial I'm going to choose the Truncated Icosahedron, that is:
                    the soccer ball:

                    http://upload.wikimedia.org/wikipedia/commons/7/7d/Trunc-icosa.jpg

                    Second. Choose two or more edges of your polyhedron. It is easier for the subsequent steps if the edges you choose are coplanar (that is, there is a plane that contains them all) but you can also choose non-coplanar edges.
                    In this example I'm going to choose the edges shown in the image:

                    Trunc-icosa.jpg

                    Three. Create something that connects the edges you've choosen.
                    If you want a nice result, it is better to draw something symmetrical. In this example, we have to connect three edges, so I've drawn a component with three-fold simmetry.

                    Trunc-icosa2.jpg

                    Four. Copy the component that connects the edges in all possible positions,
                    until you've covered every edge of the polyhedron.
                    You may now want to modify the connecting component to avoid collisions.
                    Then erase the polyhedron and just keep the connecting components (skp file attached):

                    cagework_2.jpg


                    cagework_2.skp

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                    • B Offline
                      bubbalove
                      last edited by

                      I took a shot at rendering the pencils in Kerky... I think it turned out ok.


                      pencil render.jpg

                      "Success consists of going from failure to failure without loss of enthusiasm." - Churchill

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                      • G Offline
                        guzman tierno
                        last edited by

                        Awesome, that's great, I love it

                        When I first saw it, I thought it was the image in Hart's site,
                        your rendering is really really similar to the original image,
                        Really nice work. The colors in particular are just perfect.

                        the only thing that may be improved is the model of the pencils I made
                        (the edges are too sharp).

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                        • G Offline
                          guzman tierno
                          last edited by

                          How to draw an icosahedron without ever typing in any measures.

                          http://upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Icosahedron.svg/385px-Icosahedron.svg.png

                          I know only a few people may be interested in this issue, but I think it's fun when you try.
                          It is actually way easier than it might look.
                          So here's a brief tutorial.

                          1 - Draw a "golden ratio" rectangle, SU will show a tooltip when the rectangle you're are drawing is a golden-ratio rectangle. (I will not discuss here the definition of golden-ratio rectangles and why they are so important, just use them).
                          Select the whole rectangle and make it a group.

                          Image2.jpg

                          2 - Select the group and make a rotated copy of it by rotating it around its center by 90Β°:

                          Image4.jpg

                          3 - Select the second rectangle and make a rotated copy of it by rotating it around the line shown in the image by 90Β°:

                          Image6.jpg

                          4 - Select again the second rectangle and rotate it (no copy) around the line shown in the image by 90Β°:

                          Image8.jpg

                          You should end up with three equal rectangles orthogonal to each other.

                          5 - You're done. Just connect the vertices of the rectangles to form triangles:

                          Image10.jpg

                          (you may also wanto to erase the rectangles and other internal faces)

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                          • GaieusG Offline
                            Gaieus
                            last edited by

                            Taff Goch has plenty of extremely cool tutorials about such shapes. πŸ‘

                            Gai...

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                            • G Offline
                              guzman tierno
                              last edited by

                              You're right Gaieus,
                              I know TaffGoch tutorials, they're actually a must.

                              I thought however that a step-by-step description could be useful in this thread concerning geometric constructions and sculptures.

                              (But you're right, they're problably off topic in the gallery, I wont post any more)

                              thanks.

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                              • G Offline
                                guzman tierno
                                last edited by

                                Here's the last one I made (so far):

                                mill3.jpg

                                It is inspired (in the sense that is has the same structure, rhombic triacontahedron) to:
                                George Hart's 12-Part Puzzle

                                .


                                mill 3.skp

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                                • GaieusG Offline
                                  Gaieus
                                  last edited by

                                  I didn't mean you shouldn't post whatever you like in connection with this thread (although admittedly such a tut would be nice in the respective department as well πŸ˜‰ )

                                  And of course I only mentioned Taff here because - well, true, his works are a must πŸ‘

                                  Gai...

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                                  • G Offline
                                    guzman tierno
                                    last edited by

                                    TaffGoch also has many cool models related to George Hart's sculptures like this one:

                                    http://sketchup.google.com/3dwarehouse/download?mid=21e7435470757928c72bf3eb4f056c1c&rtyp=lt&ctyp=other&ts=1229368575000

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                                    • G Offline
                                      guzman tierno
                                      last edited by

                                      An idea for the holidays.

                                      Cut 30 pieces like this:
                                      image016.jpg

                                      Then have fun sliding them toghether to obtain this:

                                      http://www.georgehart.com/athens/Greece10.JPG

                                      Precise instructions and ready-to-print templates: here and here

                                      Of course, you can also obtain similar results using sketchup

                                      triacontahedron.jpg

                                      I also built one with colored thick paper and it is actually fun.


                                      triacontaedro2.skp

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                                      • GaieusG Offline
                                        Gaieus
                                        last edited by

                                        Ehm... By sliding them together do I obtain that beautiful lady as well? 😳

                                        Gai...

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                                        • G Offline
                                          guzman tierno
                                          last edited by

                                          @gaieus said:

                                          Ehm... By sliding them together do I obtain that beautiful lady as well? 😳

                                          Actual results may vary according to use:
                                          c.jpg

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                                          • GaieusG Offline
                                            Gaieus
                                            last edited by

                                            🀣
                                            Okay, I stop spamming your topic now.

                                            Keep up the happy modeling! πŸ‘

                                            Gai...

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