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    SU models of George Hart's geometric sculptures

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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 90°:

      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 90°:

      Image6.jpg

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

      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. 👍

        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 😉 )

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

              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! 👍

                        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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                            • pilouP Offline
                              pilou
                              last edited by

                              I have made in the past a little tut video for TopMod (sorry in French but very easy to understand 😉
                              (maybe you must wait 15 second for download)
                              Unzip and launch inside your favorite navigatortopmod.jpg

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

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                              • G Offline
                                guzman tierno
                                last edited by

                                Thanks plot-paris for your comment,
                                et merci Pilou pour le tutorial, c'est très bien fait !

                                guzman.

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                                • G Offline
                                  guzman tierno
                                  last edited by

                                  @tim said:

                                  You might enjoy making models of some of Bathsheba's work too -http://www.bathsheba.com.

                                  Here's a model inspired to [url=http://www.bathsheba.com/sculpt/metatrino/:3dwc88vc]Bathsheba's Metatrino[/url:3dwc88vc] (I didnt model many details but it has the same structure: the cube and its dual, the octahedron)

                                  metatrino2.jpg
                                  metatrino.jpg

                                  If anyone wants to try, the [url=http://www.bathsheba.com/sculpt/metatron/:3dwc88vc]Metatron[/url:3dwc88vc] could be fun.


                                  metatrino2.skp

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                                  • pilouP Offline
                                    pilou
                                    last edited by

                                    The more curious is that Bathsheba describe all his works and all his numerous tools and there is not TopMod inside!!! 😮
                                    Some many times lost without it 💚
                                    Quintrino by Bathsheba

                                    http://www.bathsheba.com/sculpt/quintrino/quintrino_front.jpg

                                    Star Ball by Parrotdolphin with TopMod
                                    http://th04.deviantart.com/fs19/300W/f/2007/285/d/1/TopMod_StarBall_by_parrotdolphin.jpg

                                    Ps Your model rocks!ruby.jpg

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

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                                    • G Offline
                                      guzman tierno
                                      last edited by

                                      Nice renderings Pilou, thanks.
                                      Contributions are always wellcome.

                                      The command for connecting two faces in TopMod
                                      is actually really useful.
                                      Btw, are you a developper of TopMod?

                                      guzman.

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                                      • pbacotP Offline
                                        pbacot
                                        last edited by

                                        @unknownuser said:

                                        The more curious is that Bathsheba describe all his works and all his numerous tools and there is not TopMod inside!!!

                                        Pilou,

                                        As might be deduced from the name, Bathsheba is a She. But thank you for the link. This is mind-boggling stuff. She lives near me. I'll have to see her sculptures.

                                        Peter

                                        Link Preview Image
                                        Bathsheba Grossman - Wikipedia

                                        favicon

                                        (en.wikipedia.org)

                                        MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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                                        • pilouP Offline
                                          pilou
                                          last edited by

                                          @unknownuser said:

                                          Bathsheba is a She

                                          😳 If you right I was maybe mistaken by the speedy show of the photo! 😳

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

                                          1 Reply Last reply Reply Quote 0
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