You can use the "Edit->Put Model in Memory" submenu to pick a slot to save it to (or keyboard shortcut "m"). Then load other model. Then combine them with "Edit->Add/Blend from Memory".

If they have the same symmetry, then they should align well. If not, your milage may vary.

Sorry yes 2191. I was forgetting the highest number wasn't in Cat 30. But don't worry, I've got them too.

Currently Stella4D only has 4D compounds that can be generated from their vertex figures in the library, although yes you can bring them in via OFF if one is created outside.

I've now got every known uniform polyhedron added to Stella4D's library for the next release, including all the new ones, all the way up to 2188! And all the vertex figures work now (some of the new ones had issues initially).

The folder you linked to is missing a lot still. Cat 29 only has 2 out ...

I've got it working for all the test cases you've given now. Spittid and spiddit are 3, 9, 4, 1 (cell types, face types, edge types, vert types). J37 prism is 5, 9, 7, 2. Siggissido is 5, 9, 6, 1.

It still can't distinguish chiral pairs or types in a compound. Those will probably have to wait.

Did you borrow Miratope's algorithm to improve 4D element type calculation?

No, I have no intention of looking at how Miratope does anything. Frankly it would be much harder trying to understand someone else's code than just doing it myself. This has been on my to-do list for many years along ...

J37 is easy enough to build in Stella4D. Load J37 then use "4D->Create 4D Prism on Current Polyhedron".

Maybe your instinct is better, but it's not immediately obvious to me when it gets types wrong, eg in spittid. Takes me some playing around to see the pentagonal prisms come in two types. So ...

Can you provide examples other than spittid? Need examples in order to fix things.

H A M wrote: Mon Feb 24, 2025 3:57 pm also, do you own a Linux PC with Wine to test Stella4D on it?

No, I don't have Wine or Linux. Let us know if you figure it out.

All I can do is google the terms and see what comes up (I don't have wine).

Found someone report this:
0160:fixme:winspool:StartPagePrinter (00000001): stub
saying it happened in Wine 8.8 and was fixed in 8.10

Number at the start's a bit different, but not sure what the number means.

But also ...

I found an answer for this with regard to another piece of software, which said:

You forgot to install 32-bit OpenGL libraries (Nvidia installer asks you to install them or not).

Does that help? If you search ChoosePixelFormat and wine you may find other answers too.

Yep!

Hi, I will try to get a new version of Stella out this year, hopefully sooner rather than later. It's been in limbo for a while, for various reasons. Partly because I've worked on other things (like music ), but I have worked on Stella too.

The last release was over 10 years ago now! It was built ...

Thanks for letting me know. It's definitely running faster now, but I don't know if that's just because it got kind of rebooted. I'll see if it gets worse again over time.

I've updated the site from PHP 5.4 to PHP 7.4, and the forums from phpBB 3.2.2 to phpBB 3.3.14. Required quite a bit of work. Been on my to-do list for years! The site's been running slow lately and sometimes giving 503 errors, so hoping this might help.

I think everything is working again, but let ...

As far as I know, the duals of the Johnson solids don't generally have names.

And if they have pyramidal symmetry or less, then the precise geometry of the dual would be somewhat ambiguous too, since there's no obvious centre for spherical reciprocation (not that that means they couldn't still have ...