Search found 77 matches
- Mon May 17, 2021 10:58 am
- Forum: Polyhedron Models
- Topic: Model of new noble polyhedron
- Replies: 9
- Views: 33464
Re: Model of new noble polyhedron
Impressively beautiful. Masterful craftsmanship, as always
- Thu Apr 01, 2021 5:31 pm
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Sharpohedron
Hi I created my own web-page about Crossohedra. Then I have all the freedom, e.g. use "Crossohedra" instead of Sharpohedron. The page is here: https://tunnissen.eu/polyh/crossohedra/list.html And it is far from complete and needs a lot of work still. To this page I added a few Crossohedra with prism...
- Wed Mar 31, 2021 9:03 pm
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
- Wed Mar 31, 2021 5:38 pm
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Sharpohedron
Updated the list below: Renamed crosso-S4xI_o2o4.off to crosso-S4xI-o2_and_o4.off Added: https://tunnissen.eu/polyh/local_off.html?off_file=etc/off/crosso/crosso-S4xI-o2_and_o4-faceted.off&distance=45&stencil=on https://tunnissen.eu/polyh/local_off.html?off_file=etc/off/crosso/crosso-S4xI-o4_to_o3-f...
- Tue Mar 30, 2021 6:19 pm
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Sharpohedron
In some cases where the crosses are on the 2-fold axes it could be a good idea to extend the crosses to obtain regular faces. E.g. https://tunnissen.eu/polyh/local_off.html?off_file=etc/off/crosso/elongated_crosso-S4A4-o2.off&distance=25 https://tunnissen.eu/polyh/local_off.html?off_file=etc/off/cro...
- Mon Mar 29, 2021 7:34 am
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Sharpohedron
Updated the list below Added one by Ulrich: https://tunnissen.eu/polyh/local_off.html?off_file=etc/off/crosso/Faceted_Augmented_Trunc_Cubocta_2.off&distance=40&stencil=on Also did some renaming and added this one https://tunnissen.eu/polyh/local_off.html?off_file=etc/off/crosso/crosso-S4xI-o4_to_o3-...
- Wed Mar 17, 2021 10:32 pm
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Sharpohedron
Updated the list below
- Mon Mar 15, 2021 9:07 pm
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Sharpohedron
I updated the list below. Almost all names were updated. I will try to keep that list up to date. the links from the other posts might become broken later.
- Mon Mar 15, 2021 9:37 am
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Crossohedra
Added one with prism symmetry to the list below:
https://tunnissen.eu/polyh/local_off.ht ... istance=20 (by Don Romano)
https://tunnissen.eu/polyh/local_off.ht ... istance=20 (by Don Romano)
- Mon Mar 15, 2021 7:49 am
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Crossohedra
Yes, that one I like too. I built a model of the first one, but that one is going to be the next one. The snub, I didn't like so much, though.Ulrich wrote: ↑Mon Mar 15, 2021 7:37 amUp to now the best one imho was this:
https://tunnissen.eu/polyh/local_off.ht ... istance=15
- Mon Mar 15, 2021 7:31 am
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Crossoshedra
Added a snub to the list below.
https://tunnissen.eu/polyh/local_off.ht ... istance=25
https://tunnissen.eu/polyh/local_off.ht ... istance=25
- Sun Mar 14, 2021 6:54 pm
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Crossohedra
Which one is that?
I updated the list from before with
https://tunnissen.eu/polyh/local_off.ht ... istance=42 (by Don Romano)
https://tunnissen.eu/polyh/local_off.ht ... istance=35
- Sat Mar 13, 2021 10:46 am
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Crossohedra
I found some more variations on this theme. So are super simple and some can be found in Brückner, some are quite neat, though they are probably rediscoveries, but that doesn't spoil the fun. The following models were found by Don Romano, Ulrich Mikloweit and me (last updated 2021-03-17) Tetrahedra...
- Thu Mar 11, 2021 9:34 pm
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Sharpohedron
Good found, thanks Ulrich, also from my friend Don! I was quite convinced this would be a rediscovery, since it was such a simple model. Apparently it was known at least in 1568. I think I will build a model of it in the Swiss colours. And I might look into more of these "positive" models. Cheers! M...
- Wed Mar 10, 2021 7:57 pm
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 51801
Re: Crossohedra
Yes, that is another way of looking at it! It seems that in his book from 1900 Brückner did come a"cross" some polyhedra with the cross (as pointed out by my friend). See for instance on the right side of plate 8: row 1, #2 and row 3, #2. The former can easily be transformed by moving the crosses to...