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    SU models of George Hart's geometric sculptures

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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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                                        • G Offline
                                          guzman tierno
                                          last edited by

                                          No problem, that was fun ...

                                          thanks for your comments.

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                                          • plot-parisP Offline
                                            plot-paris
                                            last edited by

                                            what a cool thread. have to read through all of it at some point. great modeling, guys!

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