Search found 540 matches

by robertw
Mon Oct 12, 2020 1:40 pm
Forum: Stella Feature Requests
Topic: More correspondence between faceting and stellation criteria options
Replies: 4
Views: 265

Re: More correspondence between faceting and stellation criteria options

You can already interact with the stellation diagram and the cell diagram. Watch the bottom right corner for tips about what the mouse can do, and hold down Shift or Ctrl to see how they change. With the mouse in the Stellation Diagram view, hold Shift: https://i.postimg.cc/sgD7csR4/image.png Or hol...
by robertw
Mon Oct 12, 2020 1:30 pm
Forum: Polyhedron Models
Topic: Built Models of Compound Polyhedra
Replies: 9
Views: 3182

Re: Built Models of Compound Polyhedra

Very nice!
by robertw
Mon Oct 12, 2020 2:06 am
Forum: Stella Feature Requests
Topic: More correspondence between faceting and stellation criteria options
Replies: 4
Views: 265

Re: More correspondence between faceting and stellation criteria options

Thanks for the suggestions. The current stellation criteria don't really make sense for faceting, since as you say, it's about the exterior shape, which has no meaning for the dual. Stellation was added first, and was more based on the approach of Coxeter et al in The 59 Icosahedra, ie Miller's Rule...
by robertw
Mon Oct 05, 2020 1:25 pm
Forum: Stella Feature Requests
Topic: Category 26
Replies: 2
Views: 189

Re: Category 26

Yeah I fixed that already locally, but not in a released version yet. The folder was there, but I think it had been put under the category 24 folder by mistake.
by robertw
Sun Oct 04, 2020 5:09 am
Forum: Polyhedra
Topic: New Uniform Polychora
Replies: 7
Views: 453

Re: New Uniform Polychora

I would expect the small one to be first in order before the great one, but up to Bowers. I tried blending the mirror images of the sidditsphit vertex figure together, but that didn't work, so maybe the two sidditsphits are blended another way. Here's what the 3D cross-sections look like taken halfw...
by robertw
Fri Oct 02, 2020 4:05 am
Forum: Polyhedra
Topic: New Uniform Polychora
Replies: 7
Views: 453

Re: New Uniform Polychora

I received them, so looks like you found a way, or possibly someone else did? I'm pleased to see they worked straight away, with Stella4D able to generate the polychoron from just the vertex figure. Interesting that the vertex figures are facetings of the dodecahedron, and surprising that no one had...
by robertw
Thu Oct 01, 2020 3:09 am
Forum: Stella Feature Requests
Topic: Add sidditsphit and gidditsphit
Replies: 1
Views: 169

Re: Add sidditsphit and gidditsphit

Can you send me the vertex figures as .stel files?

Stella is a bit in limbo at the moment while I pull various things back together, but I'll get there and have a new version out eventually. Maybe this will prompt me to get a move on!
by robertw
Thu Oct 01, 2020 3:00 am
Forum: Polyhedra
Topic: New Uniform Polychora
Replies: 7
Views: 453

Re: New Uniform Polychora

Wow, they found new ones?!

I found the discussion you referred to: http://hi.gher.space/forum/viewtopic.php?f=25&t=2486

I'll have to look into it more later.

Can someone send me the vertex figure as a .stel file, and I'll see if I can get it to work.

Thanks.
by robertw
Tue Sep 29, 2020 2:22 am
Forum: Polyhedra
Topic: What are your favorite polyhedra?
Replies: 5
Views: 481

Re: What are your favorite polyhedra?

Marcel, it's great that you used slightly reflective paper for that compound of two W117s. The reflections around the centre look great! And yes I also love the great rhombicuboctahedron. Your one looks very well made. Here's my one. https://www.software3d.com/JPeg/GRhomCubOct.jpg But also the pseud...
by robertw
Sun Sep 20, 2020 1:24 pm
Forum: Polyhedra
Topic: What are your favorite polyhedra?
Replies: 5
Views: 481

Re: What are your favorite polyhedra?

Good question! Some of my favourites: The Great Icosidodecahedron, which I remembering seeing as an orthographic line drawing in an old book and I remember thinking I'd love to make one but didn't know how. I also remember at the time thinking it was very complex, whereas now it's quite simple compa...
by robertw
Mon Sep 14, 2020 3:26 am
Forum: Stella Forum
Topic: How to get the reflection of a chiral polyhedron?
Replies: 1
Views: 544

Re: How to get the reflection of a chiral polyhedron?

To create the reflection:

Image

To make compound with reflection:

Image

For example, compound of snub cube with its reflection:

Image
by robertw
Sun Aug 16, 2020 4:45 am
Forum: Stella Forum
Topic: Printing Part of a Net: Stellated Snub Dodecahedron
Replies: 6
Views: 1059

Re: Printing Part of a Net: Stellated Snub Dodecahedron

Not sure what you mean by "enlarges any errors, just like an optical zoom". All it does is limit how many faces can go into a net. Beyond that the nets should print as usual. It's brute force because you don't get to choose which faces go into the nets. In a case like yours, it will put faces togeth...
by robertw
Sat Aug 15, 2020 4:31 am
Forum: Stella Forum
Topic: Printing Part of a Net: Stellated Snub Dodecahedron
Replies: 6
Views: 1059

Re: Printing Part of a Net: Stellated Snub Dodecahedron

Cool. That's kind of the brute force method. The other ways may be more useful in the general case.
by robertw
Thu Aug 13, 2020 2:02 pm
Forum: Stella Forum
Topic: Printing Part of a Net: Stellated Snub Dodecahedron
Replies: 6
Views: 1059

Re: Printing Part of a Net: Stellated Snub Dodecahedron

There are several ways: Nets->Maximum Faces Per Net - In your example, set this to 5 and it will probably do what you want. Colour one or all sections as you want it (which I see you already have) and then select Nets->Nets/Paper Color Mixing->One Color Per Net/Page . If only one section is coloured...
by robertw
Sat Aug 08, 2020 4:49 am
Forum: Stella Forum
Topic: Pentagonal Hexecontahedron Variation
Replies: 2
Views: 492

Re: Pentagonal Hexecontahedron Variation

As you may have found, if you use augmentation, there isn't a way to make the new faces coplanar with existing ones. However there's an easy way to create this model, using stellation. Make sure you have a stellation view open: https://i.postimg.cc/kgzCS0WH/image.png Also select the option to show t...