Search found 531 matches

by robertw
Sun Sep 20, 2020 1:24 pm
Forum: Polyhedra
Topic: What are your favorite polyhedra?
Replies: 1
Views: 20

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: 213

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: 609

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: 609

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: 609

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: 286

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...
by robertw
Fri Jun 26, 2020 3:09 am
Forum: Stella Forum
Topic: Excluding facetings where the face's vertices lie on its edges?
Replies: 2
Views: 989

Re: Excluding facetings where the face's vertices lie on its edges?

So the dual property, the property we'd find in the faceting, would be a vertex where two or more faces meet that lie in the same plane.

I guess it would be possible, but no there's no automated way to skip those at the moment.
by robertw
Thu Jun 18, 2020 2:41 am
Forum: Polyhedra
Topic: Noble polyhedra. Where can I find them?
Replies: 17
Views: 3222

Re: Noble polyhedra. Where can I find them?

Stellations in Stella are found via combinations of stellation cells, and consist of only externally accessible faces (no hidden parts of faces). So it's not aware about how or whether facelets in the same plane can be combined into larger faces. So it's not good for finding isohedra. There are some...
by robertw
Wed Jun 10, 2020 2:28 am
Forum: Stella Forum
Topic: Certain cuploids break Stella
Replies: 1
Views: 685

Re: Certain cuploids break Stella

I can replicate the issue. The spring relaxation system is used to generate these, so I'm not surprised there are limits on it. I would need to calculate the coordinates explicitly instead. Some day I'll look into it. For now I have a lot to do to get Stella back into a releasable state, but I'll ge...
by robertw
Sun May 24, 2020 2:59 am
Forum: Polyhedra
Topic: Noble polyhedra. Where can I find them?
Replies: 17
Views: 3222

Re: Noble polyhedra. Where can I find them?

Although I added features to Stella to make them easy to find, I unfortunately never got around to publishing my results. But polyart on this forum is getting a paper published about them soon. I'll direct him to this thread, in case he hasn't seen it already. They can be found as facetings of isogo...
by robertw
Wed May 20, 2020 3:50 pm
Forum: Polyhedra
Topic: Noble polyhedra. Where can I find them?
Replies: 17
Views: 3222

Re: Noble polyhedra. Where can I find them?

If you have Great Stella or Stella4D, then they can be found in the library, in the Bruckner folder: https://i.postimg.cc/9fmD1HN2/image.png And since Stella shows you the dual as well, and nobles are all duals of other nobles, you get two at once: https://i.postimg.cc/MG1SF9XY/image.png You'll even...
by robertw
Fri Apr 17, 2020 3:38 am
Forum: Stella Forum
Topic: Is there a Default Settings tab hidden away somewhere?
Replies: 2
Views: 1531

Re: Is there a Default Settings tab hidden away somewhere?

There isn't really a page of default options anywhere, but you may be able to restore some of it by saving a default file. Use "File->Save Default Scene". Whatever scene you save there will automatically be reloaded when you restart the program, along with whatever settings were saved with that scen...
by robertw
Thu Apr 16, 2020 2:08 pm
Forum: Stella Forum
Topic: How to measure Vertex Angles
Replies: 2
Views: 1151

Re: How to measure Vertex Angles

Hi John, Yep that can be done. From the menu, enable "Display->Show Vertex Angles" Select a vertex (Either Shift+Left-click, or double-click on a vertex) It will show angles related to that vertex, like below. https://i.postimg.cc/4xpGMx5Q/image.png Measurement Mode could be used to measure angles m...
by robertw
Sat Apr 04, 2020 4:41 am
Forum: Polyhedra
Topic: Puzzle: count the cubes!
Replies: 0
Views: 1987

Puzzle: count the cubes!

I put together a little puzzle, to count intersecting cubes. You can test your answers and I just added hints in the form of colours. https://www.software3d.com/PuzzleHowManyCubes.php http://localhost/StellaWebSite/Puzzle/HowManyCubesSmall.png Let me know how you go! But please don't post the answer...
by robertw
Thu Mar 12, 2020 2:02 am
Forum: Stella Forum
Topic: Exporting incidence relations
Replies: 4
Views: 1834

Re: Exporting incidence relations

Sorry there's no way to batch export. But hopefully the .OFF format contains what you need.