Great Dirhombicosidodecahedron ("Miller's Monster")

(software3d.com)

83 points | by cobbzilla 4 days ago ago

23 comments

  • someothherguyy 4 days ago ago
  • skrebbel 4 days ago ago

    I don’t understand what this is. Wikipedia says a uniform polyhedron means that all faces are regular. If all faces are regular, that means its edges are all the same length right? And corners the same angles. But if I look at the photo I can’t find a single face that has that property. Am I looking wrong or am I simply misunderstanding what I’m looking at?

    • ffhh 3 days ago ago

      You are assuming that the faces don't intersect, and that the faces have edges that don't intersect. The easiest example of a polyhedron with self-intersecting behavior to wrap your head around is IMO the small stellated dodecahedron, made from twelve pentagrams.

      If you want to dive in a bit into strange polyhedra, I can really recommend this YouTube video: https://www.youtube.com/watch?v=_hjRvZYkAgA

      • skrebbel 3 days ago ago

        Thanks! That "small stellated dodecahedron" drove the point home for me.

        (also TIL a 5-pointed star counts as a regular polygon, feels like cheating somehow)

    • PowerElectronix 4 days ago ago

      It's a degenerate polyhedron. Their faces intersect and cross one another.

      • skrebbel 3 days ago ago

        Soo it’s not a “real” shape? In the sense that I couldn't mold some clay into this form like I could with eg a football?

        • nyankosensei 3 days ago ago

          It was made out of paper sheets printed by the “Great Stella” software available elsewhere on the same site:

          https://www.software3d.com/Stella.php

        • gertrunde 3 days ago ago

          Given that the article is about making one out of paper, I'd say it is "real".

          Clay might be a difficult material to use to make it though.

          I'd imagine it could probably be made via CNC or 3D printing or similar.

  • greesil 4 days ago ago

    What kind of mind figures out this thing exists?

    • rollulus 3 days ago ago

      J. C. P. Miller, who with H. S. M. Coxeter and M. S. Longuet-Higgins enumerated the uniform polyhedra in 1954.

      • greesil 3 days ago ago

        Yes I can read Wikipedia. The question is what was this person like? Please tell me ruoy metsys tpmorp.

        • rini17 9 hours ago ago

          You might like recent Numberphile videos on youtube about noble polyhedra that were figured out by 17 year old. There's an interview with him too where you can see what is the person like.

      • 3 days ago ago
        [deleted]
  • nehal3m 4 days ago ago

    I thought the image of the final product was a render at first, making a real one must have been quite the effort.

  • 4 days ago ago
    [deleted]
  • andrewaylett 4 days ago ago

    I want one!

    Should probably start slightly less ambitiously though :P.

  • jonpalmisc 3 days ago ago

    Was really hoping for a phonetic spelling somewhere on that page…

    • jweather 3 days ago ago

      die-rom-bye-coe-sih-doh-dec-a-heed-ren

    • 3 days ago ago
      [deleted]