Search found 167 matches

by Ulrich
Sun Jan 16, 2011 4:04 pm
Forum: Stella Feature Requests
Topic: Colouring Snubs
Replies: 7
Views: 80642

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 ...
by Ulrich
Sun Jan 16, 2011 3:23 pm
Forum: General
Topic: undesired logout
Replies: 0
Views: 98404

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 ...
by Ulrich
Fri Jan 14, 2011 10:41 pm
Forum: Stella Feature Requests
Topic: Colouring Snubs
Replies: 7
Views: 80642

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: 33331

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: 43759

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: 91851

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 ...
by Ulrich
Thu Sep 23, 2010 1:30 pm
Forum: Polyhedron Models
Topic: twisted ring
Replies: 8
Views: 91851

twisted ring

My latest stella model is a twisted ring:

Image


Image

Stel-file on request.

Ulrich
by Ulrich
Mon Jun 28, 2010 9:14 am
Forum: Polyhedron Models
Topic: How to make a compound of five rhombihexecontahedra
Replies: 0
Views: 45641

How to make a compound of five rhombihexecontahedra

This is how a compound of 5 rhombihexecontahedra (RH) can be created:

http://i254.photobucket.com/albums/hh82/Heinzzweidrei/rh_hex_5.jpg

The RH is made of 60 rhombs with an acute angle of 63.4349 degrees. To build it, it is suitable to create a rhombihexahedron first. You can cut off a 3-sided ...
by Ulrich
Wed Dec 30, 2009 11:22 am
Forum: Stella Forum
Topic: star tetrahedron
Replies: 4
Views: 27255

You load a tetrahedron and augment it with pyramids by hitting the "a"-key, chosing "augment by pyramids" and clicking "ok". The pyramids are indicated by spotted lines. Now you hit the ctrl-key and the left mouse key and pull the mouse to the right which increases the height of the pyramids to make ...
by Ulrich
Tue Jun 30, 2009 6:50 am
Forum: Stella Forum
Topic: Facet vertex angles and sizes
Replies: 15
Views: 161372

...you might need to give me a step-by-step tutorial. No, you actually do need to give me that tutorial
You choose the model you want to construct and you should show the vertices and edges, see http://www.software3d.com/StellaManual.php?prod=stella4D#showVE . Then you scale it to a radius of 10 ...
by Ulrich
Mon Jun 29, 2009 12:05 pm
Forum: Stella Forum
Topic: Facet vertex angles and sizes
Replies: 15
Views: 161372

RTChoke,

you can easily create little slabs and their bevels with stella4D:

http://i254.photobucket.com/albums/hh82/Heinzzweidrei/Icosa_faces.jpg

All you have to do is adding a polyhedron to another one of the same kind
which is scaled a little smaller. Then you decrease the symmetry to that ...
by Ulrich
Tue Dec 09, 2008 11:08 am
Forum: Stella Forum
Topic: Christmas polyhedra?
Replies: 3
Views: 22499

Thanks! It is derived from the pentagonal dipyramid J13. You find it in
another design in my new Johnson-solid-intersecting-cylinders-gallery:
http://www.polyedergarten.de/johnson/e_target3.html
Ulrich
by Ulrich
Sun Dec 07, 2008 7:31 pm
Forum: Stella Forum
Topic: Christmas polyhedra?
Replies: 3
Views: 22499

I'd like to contribute this christmas tree bowl:

Image

Best wishes

Ulrich
by Ulrich
Thu Nov 27, 2008 3:34 pm
Forum: Stella Forum
Topic: intersecting cylinders
Replies: 8
Views: 52320

.., and of course a mention that you used Stella :)


Okay. so you better use this link:

http://www.polyedergarten.de/e_cylintro.htm

I gave the snub dodecahedron a try with a 480-fold prism and it worked fine
(the 500-fold one failed here). The stripes were there too, but that's no
great ...
by Ulrich
Thu Nov 27, 2008 9:22 am
Forum: Stella Forum
Topic: intersecting cylinders
Replies: 8
Views: 52320

I made some pictures of the cores of intersecting cylinders, see:

http://www.polyedergarten.de/intersecting_cylinders_gallery/index.html

This was easily done with stella 4D by putting 500-fold prisms on the
faces of uniform polyhedra or their duals. This can take a while if there
are many faces ...