Search found 96 matches

by Ulrich
Fri Sep 28, 2018 7:03 am
Forum: Polyhedra
Topic: Nadia's Icosahedron
Replies: 13
Views: 359

Re: Nadia's Icosahedron

Ah, thanks! I tried ~6 but that could not work, as I know now.

Ulrich
by Ulrich
Tue Sep 25, 2018 8:51 am
Forum: Polyhedra
Topic: Nadia's Icosahedron
Replies: 13
Views: 359

Re: Nadia's Icosahedron

Thank you very much, I got it. And I found out how to construct the desired shape with stella: The half of the top angle of the pyramid on the top/Bottom face is 45° and the height is the same as the bottom edge. So I have to construct a frustum of that pyramid so that the top edges are the same as ...
by Ulrich
Mon Sep 24, 2018 6:41 pm
Forum: Polyhedra
Topic: Nadia's Icosahedron
Replies: 13
Views: 359

Re: Nadia's Icosahedron

I‘m on my way, got the lateral hexagons regular. I made a model of these hexagons and triangles only which can be trimmed with the „try to make faces regular“ tool.Then I took the convex null and expanded the remaining triangles to kites. Now what is the trick to cut down the top and bottom vertices...
by Ulrich
Mon Sep 24, 2018 4:34 pm
Forum: Polyhedra
Topic: Nadia's Icosahedron
Replies: 13
Views: 359

Re: Nadia's Icosahedron

Robert, Beautiful work! I tried to get it on my own but i could not make the hexagons regular. The best result gave the „create spring model“ tool. In the lateral hexagons there is a difference in the long diagonals of about 2% and the top/bottom hexagons are regular but have a different edge length...
by Ulrich
Tue Jun 12, 2018 1:33 pm
Forum: Stella Forum
Topic: Flattening a face
Replies: 4
Views: 420

Re: Flattening a face

If you want to augment a (modified) stellated dodecahedron with a tetrahedron, I think this is only possible with the great stellated dodecahedron where you cut off a piece of one spike. Then you have a new face formed like an equilateral triangle and you can augment it with a tetrahedron. http://i2...
by Ulrich
Sun Apr 29, 2018 9:26 am
Forum: Stella Forum
Topic: snub rhombicuboctahedron
Replies: 8
Views: 1215

Ah, that‘s good to know!

u.
by Ulrich
Fri Apr 27, 2018 12:37 pm
Forum: Stella Forum
Topic: snub rhombicuboctahedron
Replies: 8
Views: 1215

There is another way to create those models easily: You take the cuboctahedron and hit the "Morph duals by Expansion"-button All edges are replaced by quadrilaterals. You put the result into a Memory, retrieve it and activate the base model view again. Then you facet the squares, triangles and rhomb...
by Ulrich
Tue Apr 24, 2018 8:04 am
Forum: Stella Forum
Topic: snub rhombicuboctahedron
Replies: 8
Views: 1215

Very nice! You can get it also by simply subdividing the faces of the rhombicuboctahedron. Then facet and make the faces as regular as can be. In the same way you can make a snub rhombicosidodecahedron: http://i254.photobucket.com/albums/hh82/Heinzzweidrei/snub%20rhombicosidodecahedron_zps7b5svfj1.j...
by Ulrich
Fri Jul 28, 2017 10:29 am
Forum: Stella Forum
Topic: Tutorial: how to make this thing
Replies: 3
Views: 4016

works fine, thanks!


Image
by Ulrich
Fri Jul 28, 2017 6:36 am
Forum: Stella Forum
Topic: Tutorial: how to make this thing
Replies: 3
Views: 4016

Robert,

how do you get the six spheres blue in the original Picture?

Ulrich
by Ulrich
Sun Jun 25, 2017 9:38 am
Forum: Stella Forum
Topic: Faceting
Replies: 6
Views: 4416

You cannot upload pictures in this forum directly, you have to put a link to a file you uploaded to your website or to photobucket or something like that. Before creating a new model from facetings make sure that you chose a layout with at least 2 windows (hit ctrl+2). Then you have the base model i...
by Ulrich
Thu Mar 09, 2017 8:12 am
Forum: Stella Forum
Topic: How to Distort Heptogrammic Pyramid
Replies: 2
Views: 3218

You select the heptagrammic face, hit: scale->stretch (non-uniform scale)..., enter the desired value (scale by or set value to ...) and "perpendicular to selected face".

Ulrich
by Ulrich
Fri Mar 03, 2017 12:50 pm
Forum: Stella Forum
Topic: Breakup face
Replies: 4
Views: 5415

If you want to colour each spike of a shape like the great stellated dodecahedron individually you can open it in the base stellation view, put it into a memory, retrieve it again, activate the base polyhedron view and give each triangular face the colour you want by hitting Ctrl+c.

Ulrich
by Ulrich
Fri Mar 03, 2017 11:27 am
Forum: Stella Forum
Topic: Identify This?
Replies: 2
Views: 3880

I'd call it a rhombic 180-hedron and I guess you'll have to do the colouring by hand using Ctrl+c.

Ulrich
by Ulrich
Fri Feb 10, 2017 11:14 am
Forum: Stella Forum
Topic: Leonardo Great Dodecahedron 2
Replies: 4
Views: 4926

When this model is opened in the library it is displayed in the base stellation view. So you can fix that colour problem easily by putting the model into a memory, retrieving it again and activating the base view. Then you can select the inner parts and give them a different colour by using shift c....