Mathematical Origami
65 points by signa11 2 days ago | 15 comments

fjfaase 35 minutes ago
It is possible to fold a cube from a single sheet. The cube on the page is made from several units. The method for folding a cube from a single sheet was independently invented by Kazou Haga, Kunihiko Kasahara, Jeannine Mosely, me, and probably some others as well.

https://www.iwriteiam.nl/box-fold.html

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voidUpdate 4 hours ago
It should probably be noted somewhere that this is more "papercraft" than "origami", and the thing you download is just the net of the solid, not instructions to make what's in the picture.

Also saddened by the lack of Catalan solids

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rtkwe 4 hours ago
Some of the platonics have folding instructions not just the papercraft net but yeah I wish some of the more interesting ones had actual instructions for the thing being shown too.
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voidUpdate 3 hours ago
Ah, I didn't see those
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timdiggerm 3 hours ago
You didn't scroll past the first section before commenting?
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rtkwe 2 hours ago
Less than a half dozen of the things on that page have a set of actual origami instructions available. I can completely see missing the few out of all the others because they're the less interesting items on the page.
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voidUpdate 3 hours ago
I looked at the page, and decided I wanted to see how to origami some of the archimedian solids, which are lower down the page. I don't find platonic solids as interesting so I didn't click on them. I saw they existed but you can't see that they have folding instructions unless you click on them
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ciroduran 3 hours ago
Kusudama is your keyword if you want to learn how to do these :)

The 5 intersecting tetrahedra is particularly cool, and I've used these instructions to assemble it http://origametry.net/fit.html

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andybak 3 hours ago
At the danger of spamming this (well - posting it for the second time in 6 months) - I'm still trying to find the select demographic who appreciate this:

https://ixxyxr.github.io/polyhydra-web/?m=3

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Retr0id 45 minutes ago
Maybe I'm just the wrong demographic, but I clicked around for a bit and couldn't really tell what I was looking at. In particular I couldn't figure out how to "Choose a preset or click Random".

Edit: I found the presets in the end, I was not expecting them to be above the other controls, when it's at step 3 in the "getting started" list.

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andybak 36 minutes ago
Yeah - the lack of hand holding is partly laziness and partly intentional. I personally love digging into deep visual toys and figuring out what various button presses do.

But I probably do need to make it a little less mysterious and fix some of the obvious ux gotchas.

The brief tutorial is also probably slightly out of date since I added some features.

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saivan 4 hours ago
I was lucky enough to meet the guy behind mathigon for dinner a long time ago. He's brilliant! I'm always excited to see what he is up to! Glad to see this voted up.
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cloudhead 4 hours ago
This is not origami.
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stronglikedan 2 hours ago
Sure it is - just a bunch of origamis stuck together.
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rtkwe 2 hours ago
Most of them don't have origami instructions if they have instructions at all. I didn't find any beyond a few of the platonic solids.
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perennialreport 3 hours ago
[flagged]
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