Search found 115 matches

by Ulrich
Wed Jul 04, 2012 1:53 pm
Forum: Polyhedra
Topic: Faceted snub cube
Replies: 13
Views: 40290

By the way, the same thing doesn't work with the snub dodecahedron, in case anyone was wondering, because the edges placed diagonally across the pentagons leave a pentagrammic hole to fill, where as those across the square faces of the snub cube meet others to close the shape. But at least that sha...
by Ulrich
Tue Jul 03, 2012 7:49 am
Forum: Polyhedra
Topic: Procedure to make compounds
Replies: 3
Views: 12449

Re: Procedure to make compounds

Hi, I am trying to make a compound but am unable to find the procedure. I have a faceted tetrahedra that I want to make into a compound 5. Thanks for any help. You put the faceted tetrahedron into memory 1. Then you select the tetrahedron from the platonics and add the model from memory 1 by using ...
by Ulrich
Fri Jun 29, 2012 8:06 am
Forum: Polyhedron Models
Topic: twisted ring
Replies: 8
Views: 23864

Re: Tutorial

Here you find a pdf-file with a description how they can be made:

http://www.polyedergarten.de/Constructi ... _rings.pdf

Ulrich
by Ulrich
Wed Apr 11, 2012 7:04 am
Forum: Polyhedron Models
Topic: Fifteenth stellation of icosahedron
Replies: 3
Views: 14911

by Ulrich
Mon Mar 05, 2012 8:02 am
Forum: Polyhedra
Topic: Icosahedon 5 compound - anyone tried making one?
Replies: 7
Views: 15744

In the case of the coplanar pairs of faces of my five-octahedra-compound I always chose one "dominating" face, which defines the colour of the common area. In my Small Snub Icosicosidodecahedron, the common areas of the overlapping triangles are coloured red, while the outer parts are yellow resp. b...
by Ulrich
Mon Dec 12, 2011 7:46 am
Forum: Polyhedron Models
Topic: twisted ring
Replies: 8
Views: 23864

Peter Kane wrote:Ulrich,

These are lovely. I wish I had your eye for colour.

Pete K
Peter,

thanks! But it is stella that does the colouring automatically.

Ulrich
by Ulrich
Fri Sep 30, 2011 6:49 am
Forum: Polyhedron Models
Topic: PolyCross
Replies: 4
Views: 13892

PolyCross

Nice idea! With less symmetric shapes it can be extended to any complexity. But that would call for an electronic version.

Ulrich
by Ulrich
Mon Jan 31, 2011 1:38 pm
Forum: Stella Feature Requests
Topic: Colouring Snubs
Replies: 7
Views: 18379

I would need six colours for the pentagrams and pentagons, another ten colours for the icosahedral triangles. Would I get away with the standard five colours for the snub triangles (as if they were a hexecontahedron), or would the intersecting faces prevent that from working? Using the system descr...
by Ulrich
Sun Jan 16, 2011 4:04 pm
Forum: Stella Feature Requests
Topic: Colouring Snubs
Replies: 7
Views: 18379

Yes, this is exactly what I did, and even colouring only the 20 faces is a pain if you want to use just 5 colours. So I wished to have all this done automatically. But when I proceeded to the nonconvex snub ones, I saw that things there are different and more complicated. So I'll be happy to do the ...
by Ulrich
Sun Jan 16, 2011 3:23 pm
Forum: General
Topic: undesired logout
Replies: 0
Views: 10550

undesired logout

Robert It happened already several times that I just had typed in a longer text, and when I hit "preview", I was asked to log in again, and everything was lost! Is this a question of the properties of my own machine or is it the forum website or is there a trick other than copying everything before ...
by Ulrich
Fri Jan 14, 2011 10:41 pm
Forum: Stella Feature Requests
Topic: Colouring Snubs
Replies: 7
Views: 18379

This is how to colour a chiral polyhedron with intersecting faces, using only a few colours, where no two faces wearing the same colour, intersect. The 60 triangles of the W 114, the Inverted Snub Dodecadodecahedron can be arranged in pairs of two, sharing one common edge. The colours of these pairs...
by Ulrich
Fri Dec 24, 2010 12:51 pm
Forum: Polyhedron Models
Topic: Delicate Flower or Triffid ?
Replies: 4
Views: 17607

I made some of these vertex-connected ones, using UHU and holding two vertices near each other while counting to 100... :wink:

Ulrich
by Ulrich
Sat Dec 11, 2010 10:22 am
Forum: Polyhedron Models
Topic: Gyro expanded truncated cube
Replies: 8
Views: 22441

Alex Doskey, who is no 4 in the memberlist, has done a lot of work on the Stewart Toroids and he also deals with "Jovo Toys".

Ulrich
by Ulrich
Mon Sep 27, 2010 11:45 am
Forum: Polyhedron Models
Topic: twisted ring
Replies: 8
Views: 23864

A Moebius-style one is possible too: http://i254.photobucket.com/albums/hh82/Heinzzweidrei/mobf.jpg http://i254.photobucket.com/albums/hh82/Heinzzweidrei/mobm.jpg I made these by augmentation of 24- resp. 36-fold or 72-fold prisms by themselves and by compounds of these and 4-fold prisms. I got twis...
by Ulrich
Thu Sep 23, 2010 1:30 pm
Forum: Polyhedron Models
Topic: twisted ring
Replies: 8
Views: 23864

twisted ring

My latest stella model is a twisted ring:

Image


Image

Stel-file on request.

Ulrich