Search found 560 matches

Mon May 03, 2021 3:03 pm
Forum: Stella Forum
Topic: Vertex issue -1.#IND
Replies: 2
Views: 57

Re: Vertex issue -1.#IND

Hard to say without seeing the OFF file, but looks like a disivion by zero maybe. Not sure what would cause that, but maybe there's a degenerate face? Eg a face where all the points are the same, or along a line?
Fri Apr 16, 2021 5:30 am
Forum: Stella Forum
Topic: Selecting issue
Replies: 7
Views: 613

Re: Selecting issue

I just tried again here, but can't reproduce it. It's very hard to track down at my end unless I have a way to replicate it. Also means it's probably related to the device you're on. So I'm afraid there's probably not much I can do. I don't suppose it makes a difference which Shift key you use? Gras...
Thu Apr 15, 2021 9:13 am
Forum: Stella Forum
Topic: Calculating duals
Replies: 4
Views: 235

Re: Calculating duals

Hmm, maybe, although that would still be wrong in the simple case of J2. It would lead to a centre outside the polyhedron, and not the point that would lead to a self-dual, so it might be kind of odd. This centre is also used as the centre of rotation, by the way, so the J2 would look odd rotating a...
Wed Apr 14, 2021 4:03 am
Forum: Stella Forum
Topic: Calculating duals
Replies: 4
Views: 235

Re: Calculating duals

Duals are computed using spherical reciprocation. But this requires choosing a centre of reciprocation. For polytopes with a centre of symmetry there's an obvious choice, eg in 3D anything with dihedral, tetrahedral, octahedral or icosahedral symmetry, but not pyramidal symmetry, which has an axis o...
Sat Apr 03, 2021 4:11 am
Forum: Stella Forum
Topic: Selecting issue
Replies: 7
Views: 613

Re: Selecting issue

Is it selecting the same type of element, eg click on a vertex but it selects a different vertex? Or could it select a face for example? Does it happen on all polyhedra? Or only complex ones? Are you saying it only happens in Faceting mode and Measurement mode? Or is it any time you select a vertex,...
Fri Apr 02, 2021 5:47 am
Forum: Stella Forum
Topic: Selecting issue
Replies: 7
Views: 613

Re: Selecting issue

Is it higher DPI? If so it might be that you need to be closer to the point now for the selection to work, ie same distance in pixels but smaller pixels. I can't remember off-hand if that's how it works, or whether it takes DPI into account, but that could be it. Otherwise, not sure. When you say it...
Thu Apr 01, 2021 3:22 am
Forum: Worlds Kaleid Forum
Topic: Screen recording would be so amazing
Replies: 1
Views: 396

Re: Screen recording would be so amazing

Thanks!

Yeah I'd like to be able to create videos, but it's not easy to do so I haven't got around to it.

There may be third party apps that can record the screen?

I haven't got a Chromebook. From what I read they can run Android apps so presumably it would work.
Thu Apr 01, 2021 3:16 am
Forum: Worlds Kaleid Forum
Topic: What is the maximum resolution this app supports?
Replies: 1
Views: 203

Re: What is the maximum resolution this app supports?

You mean input limit or output limit?

I didn't set any input limits so it's just up to whether your phone can handle it.

For output the settings give a choice of either screen size or double screen size.
Sat Mar 13, 2021 12:29 pm
Forum: Stella Forum
Topic: Errors with making regular-faced polyhedron
Replies: 4
Views: 471

Re: Errors with making regular-faced polyhedron

No, 0.5 is the same as 0.5000000000000000. But if it's not all trailing zeroes, then you want to include as many as possible.
Mon Mar 08, 2021 4:24 am
Forum: Stella Forum
Topic: Errors with making regular-faced polyhedron
Replies: 4
Views: 471

Re: Errors with making regular-faced polyhedron

You would have to send me some of your OFF files for me to see what's happening with them. For OFF files to load properly they need two things: Two faces meeting perfectly at each edge Double-precision accuracy, ie go for 14 decimal places or so in the OFF file The Try-to-make-regular feature isn't ...
Mon Feb 22, 2021 2:23 am
Forum: Stella Forum
Topic: New Feature: 3D Printing App?
Replies: 10
Views: 1128

Re: New Feature: 3D Printing App?

Probably safer to presume I won't be adding such a feature within the next year. I've thought about it before though to help with what I call topological models, which are otherwise tricky to make, eg https://www.software3d.com/HollowSSD.php But it's not something I have any immediate plans to look ...
Mon Feb 22, 2021 2:13 am
Forum: Polyhedron Models
Topic: The Joys of Polyhedral Surfaces
Replies: 7
Views: 1130

Re: The Joys of Polyhedral Surfaces

You're probably best just posting images and videos here in the forum as you did already. Maybe just keep posting to this thread.
Mon Feb 22, 2021 2:09 am
Forum: Stella Forum
Topic: Orientation of Torus arm segments
Replies: 1
Views: 297

Re: Orientation of Torus arm segments

Hi, and welcome to Stella! At the moment, you're right, there's no way to decide the angle of the cross-section around the torus. One way you could make that shape though would be as follows: 1. Create torus with 6 segments around the arm rather than 3 2. Use faceting mode to create the faces you ne...
Sun Feb 21, 2021 10:18 am
Forum: Stella Forum
Topic: New Feature: 3D Printing App?
Replies: 10
Views: 1128

Re: New Feature: 3D Printing App?

3D printers require a solid enclosed volume. Looks like you're hiding some faces but not others, so the parts are infinitely thin. It would not be easy to thicken these surfaces in Stella. I don't know whether another app provides a way to do that. Might be a good option for the future, but sorry, I...
Sun Feb 21, 2021 10:11 am
Forum: Polyhedron Models
Topic: The Joys of Polyhedral Surfaces
Replies: 7
Views: 1130

Re: The Joys of Polyhedral Surfaces

Thanks Albert, glad you're enjoying it!