That‘s very nice! I never saw it before. It‘s a truncated octahedron augmented by 8 triangular cupolae (j3).
Switzerland should take a gif file of this rotating model as a flag on their website schweiz.ch.
Ulrich
Search found 167 matches
- Wed Mar 10, 2021 4:01 pm
- Forum: Polyhedra
- Topic: Sharpohedron
- Replies: 18
- Views: 124539
- Wed Feb 24, 2021 5:10 pm
- Forum: Stella Forum
- Topic: New Feature: 3D Printing App?
- Replies: 10
- Views: 29023
- Mon Feb 08, 2021 6:39 am
- Forum: Stella Forum
- Topic: Enantiomer of the Pentagonal Hexecontahedron
- Replies: 2
- Views: 9526
Re: Enantiomer of the Pentagonal Hexecontahedron
Try in the poly-menue: add model to mirror image.
Ulrich
Ulrich
- Mon Dec 14, 2020 5:20 pm
- Forum: Polyhedron Models
- Topic: Model of new noble polyhedron
- Replies: 9
- Views: 78900
- Wed Dec 02, 2020 3:40 pm
- Forum: Polyhedra
- Topic: Two new noble polyhedra - a new source of convex hulls to search from?
- Replies: 27
- Views: 233091
Re: Two new noble polyhedra - a new source of convex hulls to search from?
Oh, sorry, you're right, it's the same. I didn't look carefully.
- Wed Dec 02, 2020 11:56 am
- Forum: Polyhedra
- Topic: Two new noble polyhedra - a new source of convex hulls to search from?
- Replies: 27
- Views: 233091
- Wed Dec 02, 2020 8:16 am
- Forum: Polyhedra
- Topic: Two new noble polyhedra - a new source of convex hulls to search from?
- Replies: 27
- Views: 233091
Re: Two new noble polyhedra - a new source of convex hulls to search from?
I struggled with the cubic ones some time ago. Trying to reproduce Bückners 24,3 I faceted a rhombic cuboctahedron in a way Branko Grünbaum described years ago. In the preview window everything looks allright but if I hit shift ctrl F the face is splitted to coplanar triangles and I get 12 ...
- Mon Nov 30, 2020 7:34 am
- Forum: Polyhedra
- Topic: Two new noble polyhedra - a new source of convex hulls to search from?
- Replies: 27
- Views: 233091
Re: Two new noble polyhedra - a new source of convex hulls to search from?
Great!
I tried starting from geodesic spheres and many different bodies created with the morphing tools. Thus we get trillions of isogonal polyhedra but all isohedral facetings from these were crowns and disphenoids. All this is poking in the fog.
Ulrich
I tried starting from geodesic spheres and many different bodies created with the morphing tools. Thus we get trillions of isogonal polyhedra but all isohedral facetings from these were crowns and disphenoids. All this is poking in the fog.
Ulrich
- Mon Nov 23, 2020 8:59 am
- Forum: Polyhedra
- Topic: Two new noble polyhedra - a new source of convex hulls to search from?
- Replies: 27
- Views: 233091
Re: Two new noble polyhedra - a new source of convex hulls to search from?
senkoquartz,
your latest discoveries brought me to the following: I augmented the icosahedron with pyramids, faceted it isohedral and faceted the duals of the convex hulls of the results again. Thus I found four more noble polyhedra:
https://i.postimg.cc/sBRmDPYB/Faceted-Stellated-Dual-of ...
your latest discoveries brought me to the following: I augmented the icosahedron with pyramids, faceted it isohedral and faceted the duals of the convex hulls of the results again. Thus I found four more noble polyhedra:
https://i.postimg.cc/sBRmDPYB/Faceted-Stellated-Dual-of ...
- Sat Nov 21, 2020 8:50 am
- Forum: Polyhedra
- Topic: Two new noble polyhedra - a new source of convex hulls to search from?
- Replies: 27
- Views: 233091
Re: Two new noble polyhedra - a new source of convex hulls to search from?
Ah, thanks, I got it now. The first one is really great with its pentagonal faces and I'm eager to build it in paper.
Ulrich
Ulrich
- Wed Nov 18, 2020 1:58 pm
- Forum: Polyhedra
- Topic: Two new noble polyhedra - a new source of convex hulls to search from?
- Replies: 27
- Views: 233091
Re: Two new noble polyhedra - a new source of convex hulls to search from?
I was not able to reproduce this with my equipment because stella always crashes when I try to create an isohedral faceting of the small retrosnub icosicosidodecahedron's dual or its convex hull. Could you describe how you managed to do so?
Thanks
Ulrich
Thanks
Ulrich
- Sun Sep 27, 2020 7:27 am
- Forum: Polyhedra
- Topic: What are your favorite polyhedra?
- Replies: 5
- Views: 53337
Re: What are your favorite polyhedra?
These are beautiful models and very pretty polyhedra/polytopes!
To me it is difficult to say which one is my favorite polyhedron. It changes all day and every model I finished is my favorite one for some time. In principle, I love all uniform ones. And one of my favorite is the rhombic ...
To me it is difficult to say which one is my favorite polyhedron. It changes all day and every model I finished is my favorite one for some time. In principle, I love all uniform ones. And one of my favorite is the rhombic ...
- Fri Sep 18, 2020 8:37 am
- Forum: Polyhedra
- Topic: A list of every* isohedral triacontahedron, plus every* rigidly isohedral polyhedron, and a list of nobles
- Replies: 7
- Views: 59165
Re: A list of every* isohedral triacontahedron, plus every* rigidly isohedral polyhedron, and a list of nobles
Great work! Thanks for sharing.
I can hardly stop myself from building a paper model of 198 42 Rb immediately.
Others like 309 93 L or 301 85 L would be a challenge.
Ulrich
I can hardly stop myself from building a paper model of 198 42 Rb immediately.
Others like 309 93 L or 301 85 L would be a challenge.
Ulrich
- Sat Aug 22, 2020 11:27 am
- Forum: Polyhedron Models
- Topic: What's the most complex model you've ever made?
- Replies: 32
- Views: 299311
Re: What's the most complex model you've ever made?
Very nice model, cool and elegant colouring.
Is it so that in the polyhedron always one edge must be
counted twice because two edges of one heptagon meet
there?
Is it so that in the polyhedron always one edge must be
counted twice because two edges of one heptagon meet
there?
- Thu Jul 02, 2020 6:58 am
- Forum: Polyhedra
- Topic: Noble polyhedra. Where can I find them?
- Replies: 17
- Views: 121227
Re: Noble polyhedra. Where can I find them?
My paper about exploring noble polyhedra with Stella4D is now online at the Bridges Website:
http://archive.bridgesmathart.org/2020/ ... 20-257.pdf
Ulrich
http://archive.bridgesmathart.org/2020/ ... 20-257.pdf
Ulrich