Search found 166 matches

by Ulrich
Tue Dec 05, 2023 5:54 pm
Forum: Polyhedra
Topic: icosahedron construction
Replies: 4
Views: 30263

Re: icosahedron construction

I made some models with parts only connected at the vertices.I did that with a drop of „UHU hart“ which is a very quickly drying glue. I held each two pieces together and counted to 100, which was sufficient to keep them in place. Ulrich https://i.postimg.cc/HcGJFC81/769-D5808-A5-FA-4930-996-D-D4-E0...
by Ulrich
Sat Sep 16, 2023 1:04 pm
Forum: Polyhedron Models
Topic: Work in progress
Replies: 15
Views: 66184

Re: Work in progress

Yes, indeed :D
by Ulrich
Sat Sep 16, 2023 8:14 am
Forum: Polyhedron Models
Topic: Work in progress
Replies: 15
Views: 66184

Re: Work in progress

After four years I finally finished W116:

Image

I started W117 and hope that it will take less time to get it done.

Ulrich
by Ulrich
Mon Jun 19, 2023 5:33 am
Forum: Stella Feature Requests
Topic: Add Truncated Trapezohedra
Replies: 4
Views: 41078

Re: Add Truncated Trapezohedra

No, that can‘t be done. I tried it some years ago, using the function „try to make faces regular“ and it failed.

Ulrich
by Ulrich
Sat Feb 25, 2023 7:12 am
Forum: Stella Forum
Topic: BUG: excavating a cuboctahedron with an octahedron locks up the net algorithm
Replies: 3
Views: 13976

Re: BUG: excavating a cuboctahedron with an octahedron locks up the net algorithm

It can also be done easily by putting an octahedron into a memory and excavating the cuboctahedron from there.
by Ulrich
Sun Jan 08, 2023 4:18 pm
Forum: Stella Forum
Topic: [BUG] clicking on polyhedra face selects wrong face
Replies: 4
Views: 14659

Re: [BUG] clicking on polyhedra face selects wrong face

I had this bug too and I think I fixed it the following way (Notebook with Intel and Nvidia grafic card):

right-click on desktop, Nvidia settings, 3d settings, program settings, add Stella4D, triple buffer: on, save settings.

After that all face selects in Stella4D were ok.

Ulrich
by Ulrich
Wed Oct 12, 2022 8:57 am
Forum: Polyhedron Models
Topic: Model of new noble polyhedron
Replies: 9
Views: 28688

Re: Model of new noble polyhedron

This is another noble polyhedron model which I call Red Mambahedron. It‘s the right one in the second row of plate 25 in Brückner‘s 1906 book.

Ulrich
Image
by Ulrich
Fri Oct 07, 2022 1:42 pm
Forum: Stella Feature Requests
Topic: make stella4d open source
Replies: 7
Views: 17969

Re: make stella4d open source

IMHO everyone who isn‘t happy with Stella4D as it is is warmly invited to write his/her own program that has all desired features.

Ulrich
by Ulrich
Sun Oct 02, 2022 5:11 am
Forum: Polyhedra
Topic: Edge-Transitive Polyhedra
Replies: 6
Views: 18240

Re: Edge-Transitive Polyhedra

You just need a device that can print it with an edge length of 1 m or so and with 40 colours and an algorithm that can display the patterns in the faces.
by Ulrich
Thu Sep 29, 2022 2:53 pm
Forum: Polyhedra
Topic: Edge-Transitive Polyhedra
Replies: 6
Views: 18240

Re: Edge-Transitive Polyhedra

Here is my first try of a paper version of one of your models: O32b_2. I made it because it is very pretty and because there are only 12 rhombs crossing each other. In my physical models I want to display the inner structure. Here I had to construct pyramidal building blocs with their top vertices p...
by Ulrich
Sat Sep 03, 2022 10:43 am
Forum: Polyhedra
Topic: Edge-Transitive Polyhedra
Replies: 6
Views: 18240

Re: Edge-Transitive Polyhedra

I‘d love to have Leonardo-style shapes of them because the understanding is much better, so please post off-files of them too. Don Romano from Denver asked me to thank you on his behalf for the great work and inspiration. He immediately started to build a paper model of the first one in your list. U...
by Ulrich
Fri Sep 02, 2022 1:55 pm
Forum: Polyhedra
Topic: Edge-Transitive Polyhedra
Replies: 6
Views: 18240

Re: Edge-Transitive Polyhedra

This is great! Thanks for sharing.

Ulrich
by Ulrich
Sat Jun 11, 2022 8:03 am
Forum: Stella Forum
Topic: Some help finding a specific net?
Replies: 9
Views: 21128

Re: Some help finding a specific net?

It's the final stellation of the truncated cuboctahedron. You choose face type 3 and stellate it to the end.

Image

Ulrich
by Ulrich
Thu Mar 31, 2022 6:08 pm
Forum: Stella Forum
Topic: Final Stellation of the Icosahedron
Replies: 2
Views: 15065

Re: Final Stellation of the Icosahedron

You activate the stellation view, hit on "End" and click on the litle green left-down-arrow.
by Ulrich
Wed Mar 09, 2022 2:23 pm
Forum: Polyhedron Models
Topic: Model of new noble polyhedron
Replies: 9
Views: 28688

Re: Model of new noble polyhedron

Thanks, Robert!