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Updated forum!

Last post by robertw « Sun Jun 17, 2018 1:53 pm

by robertw » Sun Jun 17, 2018 1:53 pm

Welcome to the new-look forums!

After much difficulty, I finally managed to migrate this forum from phpBB2 to phpBB3. So what does this mean?

You...

0 Replies

7133 Views

Last post by robertw
Sun Jun 17, 2018 1:53 pm
Stella 5.4 has been released!

Last post by robertw « Mon May 12, 2014 2:05 pm

by robertw » Mon May 12, 2014 2:05 pm

Stella 5.4 has been released!

It's a free upgrade for existing Stella 5 users (use Check for Software Updates Now in the Help menu if it doesn't...

0 Replies

16385 Views

Last post by robertw
Mon May 12, 2014 2:05 pm
Announcing MoStella! Mobile app full of polyhedra.

Last post by guy « Fri Nov 02, 2018 3:27 pm
Replies: 3
by robertw » Sat Aug 24, 2013 3:06 pm

Hi folks,

I've finally finished my polyhedral mobile app MoStella. It's Android-only at the moment.

MoStella can display polyhedra, their duals,...

3 Replies

20277 Views

Last post by guy
Fri Nov 02, 2018 3:27 pm
Welcome!

Last post by robertw « Fri Jan 11, 2008 4:37 am

by robertw » Fri Jan 11, 2008 4:37 am

Welcome to the Stella forum!

This is the place to talk about Stella. Ask how to perform certain tasks, present a new technique you've discovered...

0 Replies

14885 Views

Last post by robertw
Fri Jan 11, 2008 4:37 am

Topics

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Strange rendering anomaly in Great Stella

Last post by Anselm « Sun Aug 07, 2022 6:45 am
Replies: 2
by Anselm » Sun Aug 07, 2022 3:47 am

If I load the Heptagrammic Cuploid in polyhedron view I see a bowl with seven sides, each side with 5 faces, and a regular heptagon as its base.

If...

2 Replies

93 Views

Last post by Anselm
Sun Aug 07, 2022 6:45 am
How do I transfer the license to a new computer?

Last post by MathCookie « Sat Jul 23, 2022 1:17 pm
Replies: 2
by MathCookie » Fri Jul 22, 2022 9:04 pm

I purchased Great Stella years ago, but I just recently got a new computer. I transferred the Great Stella files over to the new computer (but not...

2 Replies

215 Views

Last post by MathCookie
Sat Jul 23, 2022 1:17 pm
why stella4d can't autocolor 4d OFFs without color information, as opposed to 3d

Last post by robertw « Thu Jul 21, 2022 3:59 pm
Replies: 1
by H A M » Thu Jul 21, 2022 12:08 am

wy

1 Replies

132 Views

Last post by robertw
Thu Jul 21, 2022 3:59 pm
why morph duals by expansion in 3d doesn't show spheres and cylinders while in 4d it shows

Last post by robertw « Sat Jul 16, 2022 3:46 am
Replies: 1
by H A M » Fri Jul 15, 2022 8:40 pm

that doesn't make any sense

1 Replies

171 Views

Last post by robertw
Sat Jul 16, 2022 3:46 am
truncated sphere

Last post by robertw « Wed Jun 29, 2022 4:31 am
Replies: 1
by stav242 » Tue Jun 28, 2022 3:29 pm

Is there an option to truncate/chop off part of an object ?

ie, i only want half a sphere in the output file.

1 Replies

255 Views

Last post by robertw
Wed Jun 29, 2022 4:31 am
exporting obj files.

Last post by stav242 « Tue Jun 28, 2022 3:25 pm
Replies: 2
by stav242 » Tue Jun 28, 2022 2:41 pm

im tying to export to obj, with each surface defined in the obj as a component.

i get what i need when i export with `spheres and cylinders` - but i...

2 Replies

253 Views

Last post by stav242
Tue Jun 28, 2022 3:25 pm
Creating compounds

Last post by robertw « Mon Jun 27, 2022 2:55 am
Replies: 1
by Anselm » Sun Jun 26, 2022 11:16 pm

Is there a general method of creating compounds from its components?

We have several examples of the form 'compound of n polyhedrons , eg compound...

1 Replies

235 Views

Last post by robertw
Mon Jun 27, 2022 2:55 am
Some help finding a specific net?

Last post by Philip « Sun Jun 12, 2022 1:14 pm
Replies: 9
by Philip » Thu Jun 09, 2022 10:25 am

Hello,

I'm interested in making the below polyhedra and having trouble finding the net in Great Stella. Is it correctly named?

I found what is...

9 Replies

1851 Views

Last post by Philip
Sun Jun 12, 2022 1:14 pm
Is the great icosahedron regular?

Last post by robertw « Sun Jun 12, 2022 5:52 am
Replies: 3
by Anselm » Fri Jun 10, 2022 7:48 am

The great icosahedron is a Kepler-Poinsot polyhedron and so it is supposed to be regular. Regular means one of the most symmetrical polyhedra with...

3 Replies

757 Views

Last post by robertw
Sun Jun 12, 2022 5:52 am
Resizing Pyramids?

Last post by Philip « Thu Jun 09, 2022 10:08 am
Replies: 3
by Philip » Thu Mar 27, 2014 11:18 pm

Hi,

I can't figure out how to resize the Johnson Solid - Square Pyramid. What option do I use in the Scale menu?
Non-uniform Scale was the only one...

3 Replies

15416 Views

Last post by Philip
Thu Jun 09, 2022 10:08 am
Unidentified Polyhedron

Last post by robertw « Fri May 20, 2022 4:22 pm
Replies: 1
by KeeganTawa » Thu May 19, 2022 4:47 pm

Hey everyone - I'm working on a project and need to identify this polyhedron.

Please ignore the dark blue regions - the polyhedron in question is...

1 Replies

735 Views

Last post by robertw
Fri May 20, 2022 4:22 pm
Category 30 and organization of uniform polychora

Last post by robertw « Tue May 03, 2022 5:29 am
Replies: 1
by Mulliganaceous » Tue May 03, 2022 4:49 am

Hey Robert Webb. Mulliganaceous here.

It is impressive that a large regiment of uniforms have been discovered over the past few years. I am...

1 Replies

726 Views

Last post by robertw
Tue May 03, 2022 5:29 am
Facetings of a polyhedron

Last post by guy « Mon May 02, 2022 11:35 am
Replies: 2
by guy » Sun May 01, 2022 4:24 pm

Hi Rob,
Long time no see. Off and on I have been working on the underlying theory of polytopes, with a view to applying it to stellations and...

2 Replies

855 Views

Last post by guy
Mon May 02, 2022 11:35 am
Unable to export tour as video

Last post by melograno « Mon Apr 25, 2022 9:19 am
Replies: 9
by melograno » Thu Apr 14, 2022 8:02 pm

Hi all,

I have gone thoroughly through FAQ and through this forum, but did not find the solution to the problem: every time I want to export the...

9 Replies

1708 Views

Last post by melograno
Mon Apr 25, 2022 9:19 am
Difficulty Tessellating

Last post by KeeganTawa « Thu Apr 21, 2022 1:20 pm
Replies: 2
by KeeganTawa » Wed Apr 20, 2022 2:27 pm

Hey all -

New to the software and attempting to tessellate the truncated octahedron. I am approaching this by using the put models on faces and...

2 Replies

747 Views

Last post by KeeganTawa
Thu Apr 21, 2022 1:20 pm
Final Stellation of the Icosahedron

Last post by danielcastor « Fri Apr 01, 2022 4:47 am
Replies: 2
by danielcastor » Thu Mar 31, 2022 6:51 am

I'm sorry, this feels rudimentary, but I am unable to find or generate the final stellation of the icosahedron in Great Stella. Can you help?

2 Replies

1147 Views

Last post by danielcastor
Fri Apr 01, 2022 4:47 am
Printing scale errors

Last post by Anselm « Mon Mar 14, 2022 2:33 am
Replies: 2
by Anselm » Sat Mar 12, 2022 11:56 pm

I am using Greta Stella to print nets on paper to be transferred to other media. I am scaling the net to a specified edge length and printing edge...

2 Replies

1053 Views

Last post by Anselm
Mon Mar 14, 2022 2:33 am
Mimicking the Wenninger Color Combinations with Great Stella

Last post by robertw « Sat Feb 12, 2022 5:05 am
Replies: 1
by TomF » Fri Feb 11, 2022 4:40 am

I've only made 12 polyhedra so far, all of them using the directions in Polyhedron Models. I've decided that I like his coloring choices. Maybe I'm...

1 Replies

1270 Views

Last post by robertw
Sat Feb 12, 2022 5:05 am
Circumradii

Last post by robertw « Wed Dec 29, 2021 2:58 am
Replies: 3
by TomF » Tue Dec 28, 2021 5:33 am

I'm rather new to polyhedron construction and have only made five of the basic stellations. Because of space considerations here at home, I've made...

3 Replies

2003 Views

Last post by robertw
Wed Dec 29, 2021 2:58 am
Selecting issue

Last post by _Geometer « Wed Dec 22, 2021 8:07 pm
Replies: 10
by ndl » Thu Apr 01, 2021 7:54 pm

Hi,

I just got a new computer and installed Stella 4d with the same installer that I had before, but I'm having a new issue that when I try to...

10 Replies

6473 Views

Last post by _Geometer
Wed Dec 22, 2021 8:07 pm
Can you export a net as a .dxf file?

Last post by danielcastor « Thu Dec 02, 2021 5:22 pm
Replies: 2
by danielcastor » Wed Dec 01, 2021 9:59 pm

I work primarily in AutoCAD and am able to export .dxf models from Stella for use. This is fine for simple polyhedra, but the more complex shapes...

2 Replies

1898 Views

Last post by danielcastor
Thu Dec 02, 2021 5:22 pm
4D

Last post by Ulrich « Fri Nov 12, 2021 8:05 am
Replies: 1
by robertw » Fri Nov 12, 2021 4:51 am

Someone asked me to explain 4D, so I thought it would be better to do it here in a post for all to see.

We only have 3 spatial dimensions in our...

1 Replies

1721 Views

Last post by Ulrich
Fri Nov 12, 2021 8:05 am
Vertex issue -1.#IND

Last post by Wagyx « Sat May 08, 2021 12:09 pm
Replies: 2
by Wagyx » Mon May 03, 2021 6:28 am

Hello,

I get an issue when loading some off file into Stella. The loading does not go so fine, I get the right number of vertices, edges and faces...

2 Replies

3075 Views

Last post by Wagyx
Sat May 08, 2021 12:09 pm
Calculating duals

Last post by ndl « Thu Apr 15, 2021 9:12 pm
Replies: 4
by ndl » Tue Apr 13, 2021 5:12 pm

I was looking at the vertex figure of the scaliform polychoron bidex , and I noticed that when stella makes the dual it comes out a little skewed....

4 Replies

3592 Views

Last post by ndl
Thu Apr 15, 2021 9:12 pm
Errors with making regular-faced polyhedron

Last post by Wagyx « Thu Apr 15, 2021 8:44 am
Replies: 4
by Wagyx » Sat Mar 06, 2021 8:47 pm

Hi there,

I would like to report two issues:
- an internal error ConnectEdges(): Could not find mNeigh for edge 19-1. when loading an OFF file
- an...

4 Replies

3774 Views

Last post by Wagyx
Thu Apr 15, 2021 8:44 am
New Feature: 3D Printing App?

Last post by albertpcarpenter « Wed Feb 24, 2021 10:41 pm
Replies: 10
by albertpcarpenter » Sat Feb 20, 2021 4:22 am

New feature or one I am unaware of... Is it possible to export Stella files for 3D printing? If so how? If not could that be done? Albert

10 Replies

6915 Views

Last post by albertpcarpenter
Wed Feb 24, 2021 10:41 pm
Orientation of Torus arm segments

Last post by robertw « Mon Feb 22, 2021 2:09 am
Replies: 1
by M&M » Sun Feb 21, 2021 2:38 pm

Hi , I’m a beginner with Great Stella, so I hope that this is not a stupid question.

Let us create a torus with 5 segments around torus and 3...

1 Replies

2183 Views

Last post by robertw
Mon Feb 22, 2021 2:09 am
Enantiomer of the Pentagonal Hexecontahedron

Last post by eligius1427 « Tue Feb 09, 2021 12:05 am
Replies: 2
by eligius1427 » Sun Feb 07, 2021 9:47 pm

Hello, I'm trying to create the model of a variation of the Pentagonal Hexecontahedron. It is the dual of the two enantiomers (Laevo and Dextro)...

2 Replies

2783 Views

Last post by eligius1427
Tue Feb 09, 2021 12:05 am
Searching Stella for a specific polyhedron

Last post by eligius1427 « Mon Oct 26, 2020 1:50 pm
Replies: 2
by eligius1427 » Sun Oct 25, 2020 6:28 pm

Hello, I am new to Stella 4D Pro as well as Polyhedra outside of the common ones. I use polyhedron shapes as the starting points for large public art...

2 Replies

3718 Views

Last post by eligius1427
Mon Oct 26, 2020 1:50 pm
How to get the reflection of a chiral polyhedron?

Last post by robertw « Mon Sep 14, 2020 3:26 am
Replies: 1
by senkoquartz » Mon Sep 14, 2020 1:40 am

See thread title.

I want to make compounds of chiral shapes and their reflections

1 Replies

3220 Views

Last post by robertw
Mon Sep 14, 2020 3:26 am
Printing Part of a Net: Stellated Snub Dodecahedron

Last post by Jonathan Lawrence « Wed Aug 19, 2020 12:19 pm
Replies: 6
by Jonathan Lawrence » Thu Aug 13, 2020 4:50 am

How do I print one part of a net, with identical parts, for a large model? This might be deleting selected parts of a net, or printing without...

6 Replies

6280 Views

Last post by Jonathan Lawrence
Wed Aug 19, 2020 12:19 pm
Pentagonal Hexecontahedron Variation

Last post by Jonathan Lawrence « Sat Aug 08, 2020 5:28 am
Replies: 2
by Jonathan Lawrence » Fri Aug 07, 2020 10:56 am

In the three-step process to convert a Snub Dodecahedron into the Irregular Pentagonal Hexecontahedron , how do I build pyramids on sets of identical...

2 Replies

3321 Views

Last post by Jonathan Lawrence
Sat Aug 08, 2020 5:28 am
Excluding facetings where the face's vertices lie on its edges?

Last post by robertw « Fri Jun 26, 2020 3:09 am
Replies: 2
by senkoquartz » Thu Jun 25, 2020 6:01 pm

I was searching for isohedral triacontahedra by faceting the icosidodecahedron and checking its duals. But 95% of them end up having faces with verts...

2 Replies

4209 Views

Last post by robertw
Fri Jun 26, 2020 3:09 am
Certain cuploids break Stella

Last post by robertw « Wed Jun 10, 2020 2:28 am
Replies: 1
by URL » Tue Jun 09, 2020 6:10 pm

Trying to enter a 21/10 cuploid in Stella generates a broken shape that barely resembles a cuploid. This seems to happen for all n/d cuploids with...

1 Replies

3384 Views

Last post by robertw
Wed Jun 10, 2020 2:28 am
Is there a Default Settings tab hidden away somewhere?

Last post by johnanthony « Fri Apr 17, 2020 6:40 am
Replies: 2
by johnanthony » Thu Apr 16, 2020 2:32 pm

Hello again

As I learn more and more about this wonderful program, and jump around between all the different polyhedra families and functions, I...

2 Replies

4844 Views

Last post by johnanthony
Fri Apr 17, 2020 6:40 am
How to measure Vertex Angles

Last post by johnanthony « Thu Apr 16, 2020 2:20 pm
Replies: 2
by johnanthony » Thu Apr 16, 2020 11:36 am

Hello - I am a newbie here so I am afraid I will be asking quite a few questions over the next few weeks, please bear with me. :-)

My first question...

2 Replies

4405 Views

Last post by johnanthony
Thu Apr 16, 2020 2:20 pm
Exporting incidence relations

Last post by nikobreu « Thu Mar 12, 2020 12:19 pm
Replies: 4
by nikobreu » Tue Mar 10, 2020 1:04 pm

Is there a way to export the incidence relation between the faces edges and edges vertices of a given polytope in Stella? Alternatively, is there...

4 Replies

6230 Views

Last post by nikobreu
Thu Mar 12, 2020 12:19 pm
Internal Parts

Last post by Ulrich « Tue Mar 03, 2020 12:31 pm
Replies: 3
by hecatonicosachoron » Sun Mar 01, 2020 7:20 pm

I apologize if this question as been answered before, but I am curious how you make the internal parts seen here:

Or to pick a simpler example:...

3 Replies

5531 Views

Last post by Ulrich
Tue Mar 03, 2020 12:31 pm
Printing nets without edges?

Last post by robertw « Fri Feb 21, 2020 12:00 pm
Replies: 1
by hecatonicosachoron » Thu Feb 20, 2020 11:50 pm

Hello, I recently bought Stella 4d and I am greatly enjoying it!

Is it possible to print the nets in such a way that only the vertices appear as...

1 Replies

3890 Views

Last post by robertw
Fri Feb 21, 2020 12:00 pm
Put a polyhedron inside another

Last post by robertw « Fri Jan 17, 2020 2:43 pm
Replies: 7
by Carabama » Mon Jan 13, 2020 6:04 pm

Hello all,
so far I used Great Stella in a intuitive way but now I need to get images of precise polyhedron(s) inside another/others, for a lecture I...

7 Replies

8811 Views

Last post by robertw
Fri Jan 17, 2020 2:43 pm
How to you make base polyhedron view stels

Last post by robertw « Sat Dec 21, 2019 8:26 am
Replies: 1
by metachirality » Sat Dec 21, 2019 12:10 am

I've been trying to make stel files with the silver rods and golden spheres but I don't know how to do it. I wanted a faceting of a polyhedron but I...

1 Replies

3895 Views

Last post by robertw
Sat Dec 21, 2019 8:26 am
4D stellations

Last post by robertw « Tue Dec 03, 2019 1:30 am
Replies: 8
by ndl » Sun Aug 18, 2019 4:33 am

I wanted to create 3D stellation patterns for 4D regulars, and I figured out how to do it I'm just missing one step that maybe someone would be able...

8 Replies

11998 Views

Last post by robertw
Tue Dec 03, 2019 1:30 am
How does Stella4D determine the dual?

Last post by mrjaco « Sat Oct 12, 2019 9:06 am
Replies: 31
by Swami Polytope » Mon Aug 17, 2015 9:36 pm
1

2

3
Hi Stella-ers,

New here; first post. Excited to explore Stella4D, & polytopes!:)...

(This post got a bit long, but I've endeavored to be as...
31 Replies

93958 Views

Last post by mrjaco
Sat Oct 12, 2019 9:06 am
4D Compounds from verf

Last post by ndl « Tue Jun 11, 2019 3:29 am
Replies: 9
by ndl » Tue May 14, 2019 6:49 pm

I'm having inconsistency in being able to create 4D compounds from compound verf. Sometimes it works and sometimes not even from the same verf, for...

9 Replies

12086 Views

Last post by ndl
Tue Jun 11, 2019 3:29 am
Non-Uniform 4D

Last post by ndl « Thu Feb 28, 2019 2:35 am
Replies: 17
by ndl » Mon Dec 31, 2018 4:45 am
1

2
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...
17 Replies

21419 Views

Last post by ndl
Thu Feb 28, 2019 2:35 am
STL export orientation

Last post by robertw « Wed Jan 23, 2019 5:13 am
Replies: 4
by jweather » Mon Jan 21, 2019 7:27 pm

I just printed a lovely Snub Cube via the STL Export and my 3D printer. I'm looking for other interesting shapes to print now, and came across the...

4 Replies

7457 Views

Last post by robertw
Wed Jan 23, 2019 5:13 am
Coxeter Plane projections

Last post by robertw « Tue Jan 08, 2019 2:41 am
Replies: 8
by Benoit » Thu Jan 03, 2019 6:14 pm

Good day everyone

obviously, someone has succeeded in using Stella to produce the projection on Coxeter planes of various 4D polytopes, including...

8 Replies

10878 Views

Last post by robertw
Tue Jan 08, 2019 2:41 am
dividing net pieces

Last post by robertw « Sun Jan 06, 2019 3:04 am
Replies: 1
by Robin Adair » Sat Jan 05, 2019 11:54 pm

I'm interested in building a Crossed Heptagrammic Cupoliac Blend, Symbol: Q+ 7/5.
Some of the pieces are quite tiny! I've selected Color per face,...

1 Replies

4412 Views

Last post by robertw
Sun Jan 06, 2019 3:04 am
What is an InsertLine failure?

Last post by robertw « Sun Dec 09, 2018 12:25 pm
Replies: 3
by Mulliganaceous » Thu Dec 06, 2018 8:48 am

When creating certain polyhedra which is either extremely complex or contains parts which can cause great round-off errors (such as very small angles...

3 Replies

6482 Views

Last post by robertw
Sun Dec 09, 2018 12:25 pm
coloring for nets

Last post by Robin Adair « Fri Nov 30, 2018 6:14 pm
Replies: 8
by Robin Adair » Mon Nov 26, 2018 4:42 pm

I am trying to create a model of W-58, Twelfth stellation of the icosidodecahedron. When I bring up the model in Stella 4d, the star arms are in red,...

8 Replies

10816 Views

Last post by Robin Adair
Fri Nov 30, 2018 6:14 pm

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