Search found 32 matches

by ndl
Thu Feb 28, 2019 2:35 am
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Re: Non-Uniform 4D

2nd part...
by ndl
Thu Feb 28, 2019 2:34 am
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Re: Non-Uniform 4D

Here's my completed set of all segmentachora! Had to split it into 2 zip files because it's bigger than 256kb.
The Last 4 in the list I used a heptagon as an example.
by ndl
Wed Feb 27, 2019 4:54 am
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Re: Non-Uniform 4D

Didn't think I could but just checking.
Thanks.
I'll post a zip file of all the segmentachora when I finish them.
by ndl
Tue Feb 26, 2019 6:53 pm
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Re: Non-Uniform 4D

I'm making .stel files of all the segmetochora, I was wondering if there is any way to embed in a file the ability to ask for a prism number and create something from that prism/antiprism like in the n-gonal prism built-in file. Thanks
by ndl
Sun Feb 17, 2019 4:40 am
Forum: Stella Feature Requests
Topic: Curved Shapes
Replies: 1
Views: 180

Curved Shapes

It would be great if there was a option to smooth out certain edges in order to create curved shapes. The two adjacent faces could be considered one curved surface. In 4D also you could have curved cells. The inner geometry would still just be an approximation but the view could look curved and the ...
by ndl
Fri Feb 08, 2019 4:05 am
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Re: Non-Uniform 4D

I figured out the problem: I was using the wrong formula to calculate the vertices so the ones I had were creating coplanar faces so that's probably why it was crashing. Once I fixed the formula it worked no problems.
by ndl
Thu Feb 07, 2019 2:57 pm
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Re: Non-Uniform 4D

I made the following .off file but when I open it in stella4d and ask it to make convex hull the program crashes. Do you know what could be the problem?

cylindrical crind.off
by ndl
Mon Jan 21, 2019 3:39 am
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Re: Non-Uniform 4D

Yes, convex hull is what I need and it works just fine. Thanks again
by ndl
Sun Jan 20, 2019 3:50 am
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Re: Non-Uniform 4D

It got confused when I listed cells, but I did a listing of just the vertices and it created the 4D convex hull for me! Thanks for your help.
by ndl
Thu Jan 17, 2019 4:17 am
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Re: Non-Uniform 4D

I'm trying to work with .off files to create 4D non-uniforms, but it's way too tedious to try to figure out all the faces and cells that would connect the vertices. I found this program called qhull (www.qhull.org) that will calculate the convex hull and create an .off file from input vertices, but ...
by ndl
Tue Jan 01, 2019 4:24 am
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Re: Non-Uniform 4D

What about an ability to cut off pieces of uniform polyhedra? That would give rise to lots of interesting non-uniforms. Maybe create it by choosing a cross section to cut it at (this could really be a great feature for 3D also!).
by ndl
Mon Dec 31, 2018 4:45 am
Forum: Stella Forum
Topic: Non-Uniform 4D
Replies: 17
Views: 937

Non-Uniform 4D

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 non-uniforms. I wanted to make an Icosahedral pyramid, for example, so I tried using a J2 pentagonal pyramid as vertex figure to create it, but it only g...
by ndl
Thu Dec 20, 2018 5:07 am
Forum: Stella Feature Requests
Topic: Augmenting with polyhedra
Replies: 3
Views: 402

Re: Augmenting with polyhedra

That's good to know. Thanks again
by ndl
Thu Dec 20, 2018 4:13 am
Forum: Stella Feature Requests
Topic: Augmenting with polyhedra
Replies: 3
Views: 402

Re: Augmenting with polyhedra

Never mind, it seems that feature is already available and I overlooked it.
by ndl
Thu Dec 20, 2018 3:39 am
Forum: Stella Feature Requests
Topic: Augmenting with polyhedra
Replies: 3
Views: 402

Augmenting with polyhedra

Could there be a way to choose which matching face of existing polyhedron is used for augmentations? Often I find I want to use a different one than which is automatically chosen.
Thanks