Search found 134 matches

by Ulrich
Mon May 05, 2008 7:02 am
Forum: Stella Forum
Topic: London Gerkin
Replies: 30
Views: 95524

You can start with an 18-fold antiprism. You subdivide the faces and create a frustum (a "truncated pyramid" or a prism where one base face has a smaller diameter than the other one). You put this into the memory and you can deform it by nonuniform scale along the rotation axis. Repeating augmentati...
by Ulrich
Tue Apr 15, 2008 6:17 am
Forum: Stella Forum
Topic: Fractal polyhedra in Stella
Replies: 3
Views: 14020

Roger, some time ago, I made lots of such structures: http://www.polyedergarten.de/polyhedrix/aug/w12_2.jpg see: http://www.polyedergarten.de/polyhedrix/e_augintro.htm In a similar way, you can produce pretty spirals: http://www.polyedergarten.de/polyhedrix/ico_octa/ico_octa_spiral_leo_2.jpg http://...
by Ulrich
Tue Mar 25, 2008 8:00 am
Forum: Polyhedron Models
Topic: thin glass?
Replies: 7
Views: 25091

Re: thin glass?

robertw wrote:Ulrich, do you do anything special to avoid tabs being visible through all those holes?
No, I only try to place them all towards the inside of the model, which is possible in most cases. If you look at the close-up, you can see the tabs.

Ulrich
by Ulrich
Sat Mar 22, 2008 7:10 pm
Forum: Polyhedron Models
Topic: thin glass?
Replies: 7
Views: 25091

I like models made of transparent material where I can see the inside and the outside at the same time. Perhaps you find some inspiration at the following websites: Henry Chasey made some partially transparent acrylic polyhedra: http://www.georgehart.com/chasey.html and MarcelTeun made one with tran...
by Ulrich
Mon Mar 10, 2008 11:09 am
Forum: Polyhedron Models
Topic: Paper model choices. Scissors/knife? Single/double tabs? etc
Replies: 24
Views: 175996

marcelteun wrote:I considered squeezing layers together a long time ago, but I was a bit afraid that this would be too inaccurate
I use a small stapler to sqeeze the layers together. Since my paper is rather thin, I can squeze up to 5 layers. The time saving is about 3, using your scale from 0 to 5.

Ulrich
by Ulrich
Mon Mar 03, 2008 7:10 am
Forum: Polyhedron Models
Topic: What's the most complex model you've ever made?
Replies: 32
Views: 111490

Have you tried software to convert from bitmap to vector? Yes, I tried it and the results are not good at all. But there's a trick I was told by Rob Pierce: You can print the net in the pdf-format and import that file in corel. This is much better, but not the way it could be because if the net is ...
by Ulrich
Sun Mar 02, 2008 6:56 pm
Forum: Polyhedron Models
Topic: What's the most complex model you've ever made?
Replies: 32
Views: 111490

why does yours have so many holes compared with the Stella one? This is Ulrich's style, to leave holes in the faces so that the inner parts can also be seen (the parts of faces normally hidden within the model). That's right. I believe Ulrich uses Stella's stellation features to create the nets for...
by Ulrich
Sun Mar 02, 2008 9:07 am
Forum: Polyhedron Models
Topic: What's the most complex model you've ever made?
Replies: 32
Views: 111490

starbase1 wrote:Is this object available in Stella?
Yes, it's a uniform polyhedron. You just click on the two blue drawers and enter its Wenninger-No "W108" to choose it.

u.
by Ulrich
Thu Feb 28, 2008 8:19 am
Forum: Polyhedron Models
Topic: Paper model choices. Scissors/knife? Single/double tabs? etc
Replies: 24
Views: 175996

Ulrich, your models are amazing! Do you just cut out patterns on the faces of the models, or what? Thanks. My models are piles of stellations from the core to the final shape. Into each one I cut holes to look through. I do this to show how the faces run through the final model. You can't see this ...
by Ulrich
Fri Feb 22, 2008 9:48 am
Forum: Polyhedra
Topic: Compounds of cubes
Replies: 8
Views: 29536

it took me more than half a year to calculate (using standard algebra) the shape of the individual pieces. After that I still didn't have any clue of how the polyhedron would look. Then it took me a few more months to build a model. Marcel, I had an absolutely similar experience with my model of fi...
by Ulrich
Sat Feb 16, 2008 9:13 am
Forum: Polyhedron Models
Topic: Paper model choices. Scissors/knife? Single/double tabs? etc
Replies: 24
Views: 175996

I'm using white paper with a weight of 80g/m². This I cut with scissors or knives. I make single tabs which I glue with UHU. The kind of bottle which I prefer has a very fine beak to spread the glue directly on the tab. Sometimes I still use wooden toothpicks for this purpose. Since this UHU hardens...
by Ulrich
Thu Feb 14, 2008 5:27 pm
Forum: Polyhedron Models
Topic: What's the most complex model you've ever made?
Replies: 32
Views: 111490

Up to now, the greatest polyhedral challenge to me was W 108, the Great Truncated Icosidodecahedron. http://i254.photobucket.com/albums/hh82/Heinzzweidrei/w108_04.jpg This model has a diameter of about 40 cm. I never counted the number of facelets, but I know that I needed 153 sheets of paper for it...
by Ulrich
Fri Feb 08, 2008 2:27 pm
Forum: Polyhedron Models
Topic: Printing Nets
Replies: 2
Views: 11117

You can do this easily by print via preview in the file menue, where you can chose which measures you want to be printed.

Image

Ulrich
by Ulrich
Tue Jan 29, 2008 10:07 am
Forum: Stella Forum
Topic: How do I modify a solid?
Replies: 6
Views: 32202

Re: How do I modify a solid?

More easily, you can use faceting technique in this case: change the symmetry to 5fold pyramidal, then subdivide the faces by 3 and facet out the top pentagon, the lateral tetragons and the unchanged triangles, that's all.

Ulrich