Search found 54 matches
- Sun Jan 20, 2019 3:50 am
- Forum: Stella Forum
- Topic: Non-Uniform 4D
- Replies: 17
- Views: 31098
Re: Non-Uniform 4D
It got confused when I listed cells, but I did a listing of just the vertices and it created the 4D convex hull for me! Thanks for your help.
- Thu Jan 17, 2019 4:17 am
- Forum: Stella Forum
- Topic: Non-Uniform 4D
- Replies: 17
- Views: 31098
Re: Non-Uniform 4D
I'm trying to work with .off files to create 4D non-uniforms, but it's way too tedious to try to figure out all the faces and cells that would connect the vertices. I found this program called qhull (www.qhull.org) that will calculate the convex hull and create an .off file from input vertices, but ...
- Tue Jan 01, 2019 4:24 am
- Forum: Stella Forum
- Topic: Non-Uniform 4D
- Replies: 17
- Views: 31098
Re: Non-Uniform 4D
What about an ability to cut off pieces of uniform polyhedra? That would give rise to lots of interesting non-uniforms. Maybe create it by choosing a cross section to cut it at (this could really be a great feature for 3D also!).
- Mon Dec 31, 2018 4:45 am
- Forum: Stella Forum
- Topic: Non-Uniform 4D
- Replies: 17
- Views: 31098
Non-Uniform 4D
I just got Stella4D and I'm trying to play around with it. It seems you covered pretty extensively 4D uniforms, but I had trouble trying to create non-uniforms. I wanted to make an Icosahedral pyramid, for example, so I tried using a J2 pentagonal pyramid as vertex figure to create it, but it only g...
- Thu Dec 20, 2018 5:07 am
- Forum: Stella Feature Requests
- Topic: Augmenting with polyhedra
- Replies: 3
- Views: 21195
Re: Augmenting with polyhedra
That's good to know. Thanks again
- Thu Dec 20, 2018 4:13 am
- Forum: Stella Feature Requests
- Topic: Augmenting with polyhedra
- Replies: 3
- Views: 21195
Re: Augmenting with polyhedra
Never mind, it seems that feature is already available and I overlooked it.
- Thu Dec 20, 2018 3:39 am
- Forum: Stella Feature Requests
- Topic: Augmenting with polyhedra
- Replies: 3
- Views: 21195
Augmenting with polyhedra
Could there be a way to choose which matching face of existing polyhedron is used for augmentations? Often I find I want to use a different one than which is automatically chosen.
Thanks
Thanks
Re: New Torus
And an alternate version with antiprism and cupola replacing rotunda:
Re: New Torus
Even better, I got one with a genus of 6 and retaining the original symmetry of J76 by cutting through with a Dodecahedron and 5 J11s
Still quasi-convex!
Still quasi-convex!
Re: New Torus
So I created a new toroid that has Stewart's quasi-convex property that doesn't seem to be mentioned in his book (I only have first edition, though):
This is J76 with a rotunda and two icosahedra removed for a genus of 2.Re: New Torus
I found another interesting one yesterday:
This is a J91+J63 Tunnel through a J32 (Pentagonal Orthocupolarontunda)
I realized then that J32 had a cross section of 2 of those irregular hexagons that Stewart talked about inside a Rhombicosidodecahedron.
This is a J91+J63 Tunnel through a J32 (Pentagonal Orthocupolarontunda)
I realized then that J32 had a cross section of 2 of those irregular hexagons that Stewart talked about inside a Rhombicosidodecahedron.
- Thu Nov 29, 2018 7:13 pm
- Forum: Stella Forum
- Topic: coloring for nets
- Replies: 8
- Views: 15301
Re: coloring for nets
Maybe you by accident selected "no tabs" in the menu? Do the tabs show up on the print preview?
Re: New Torus
Thanks Ulrich for your suggestion, I actually did find his website last night and there are numerous interesting things there, but I didn't see this example. Really I need to get a copy of Stewart's book, like Alex said on his website it's really most useful as a supplement with the book. I actually...
New Torus
I found a new interesting equal-edged torus today by excavating two J92's out of an icosidodecahedron
Has anyone ever made this before?
I never read Stewart's toroid book, maybe it's in there?
Has anyone ever made this before?
I never read Stewart's toroid book, maybe it's in there?
- Fri Aug 17, 2018 9:39 pm
- Forum: Stella Feature Requests
- Topic: Zometool
- Replies: 6
- Views: 27063
Re: Zometool
There's an open-source program to model with zometool called vzome: http://vzome.com/home/ but it's not nearly as powerful as Stella and has very limited features.