Search found 134 matches

by Ulrich
Mon Mar 02, 2015 11:16 am
Forum: Polyhedra
Topic: Compound of 3 Rhombic Prisms
Replies: 12
Views: 31085

Seems that I was a little too hasty describing the procedure. In the rh prism, there are 8 edges where squares and rhombs meet at 90° and 4 edges where only squares meet. At two of the latter ones, the squares are forming an acute angle (=> "acute edges"), at the other ones the angle is shallow (=>"...
by Ulrich
Sun Mar 01, 2015 11:50 am
Forum: Polyhedra
Topic: Compound of 3 Rhombic Prisms
Replies: 12
Views: 31085

Jos, it can be constructed quickly in the following way: You choose the triangular prism (hit 3,4,4 and ok in the search field). You put this into memory 1. Then you select a square face and augment it by the model in the memory 1 (selected face only, and right (->), to get the orientation ok). You ...
by Ulrich
Sun Feb 02, 2014 12:22 pm
Forum: Stella Forum
Topic: Help Please! How do I do this...
Replies: 6
Views: 20534

... Doing it your way also means that you could facet using the original vertices of the trapezoidal hexacontahedron to keep the original face shapes around the bottom. Rob. Unfortunately that doesn't work because the four vertices you need are not lying in a plane. I had to take the stellation ver...
by Ulrich
Sat Feb 01, 2014 9:05 am
Forum: Stella Forum
Topic: Help Please! How do I do this...
Replies: 6
Views: 20534

Perhaps a new occasion to think about enhancing that "put models
on faces/vertices-tool"? :wink:
by Ulrich
Fri Jan 31, 2014 1:13 pm
Forum: Stella Forum
Topic: Help Please! How do I do this...
Replies: 6
Views: 20534

Re: Help Please! How do I do this...

Mitch, this is another way to get to it, perhaps a little bit faster: You first construct a base model, starting from a 10-fold prism and using the augmentation techniques Robert described: http://i254.photobucket.com/albums/hh82/Heinzzweidrei/mitch_vand_base_zpse1ca1b95.jpg Then you put the trapezo...
by Ulrich
Fri Jan 31, 2014 11:27 am
Forum: Polyhedron Models
Topic: Help with MW63
Replies: 22
Views: 59593

Looks great, especially with the colouring of the pentagons.

Urich

PS: I wouldn' trust the cat!
by Ulrich
Sun Sep 01, 2013 1:56 pm
Forum: Stella Forum
Topic: Can Anybody Help Me Make A Moravian Star Please?
Replies: 18
Views: 56630

here it is

Ulrich
by Ulrich
Wed Aug 28, 2013 10:06 am
Forum: Stella Forum
Topic: Can Anybody Help Me Make A Moravian Star Please?
Replies: 18
Views: 56630

You load the Rhombicuboctahedron and click on the fifth icon from the right in the last row (onmouseover you see "Morph Duals by Expansion"). Then you keep the ctrl-button pressed, click the left mouse button and pull the mouse to the right. Rectangles appear between the base model's faces and in th...
by Ulrich
Wed Aug 28, 2013 8:57 am
Forum: Stella Forum
Topic: Can Anybody Help Me Make A Moravian Star Please?
Replies: 18
Views: 56630

You can morph the rhombicuboctahedron to its dual by expansion up to say 20 %, save it to the memory and retrieve it again. Then you do the augmentation of the squares and the triangles: http://i254.photobucket.com/albums/hh82/Heinzzweidrei/Augmented_Rhombicuboctahedron_Dual_Morph_20_zpsef7d95ba.jpg...
by Ulrich
Thu Aug 15, 2013 9:02 am
Forum: Polyhedron Models
Topic: Hexagonal deltohedron
Replies: 1
Views: 11885

Great model!
by Ulrich
Thu Jul 18, 2013 9:53 am
Forum: Stella Forum
Topic: Sacred Geometry
Replies: 45
Views: 192052

Re: Hello again, Ulrich!

it seems to line up 4 points on a straight line which is a single axis when viewed from above. That is correct. If you hit "s" in stella 4D, you can see the rotation axes. There are 4 3-fold ones in the compound of two tetrahedra. could you tell me if that is correct in the tet2_2k2.gif -- that the...
by Ulrich
Sat Jun 08, 2013 9:26 pm
Forum: Polyhedron Models
Topic: Faceted Polyhedron
Replies: 3
Views: 18839

Isn't this a medial rhombic triacontahedron?
by Ulrich
Thu Mar 28, 2013 7:14 pm
Forum: Polyhedra
Topic: Faceted snub cube
Replies: 13
Views: 45331

Re: Faceted Snub Cube

Thanks!

This is a picture of my model of the dual of the other one, derived from the snub dodecahedron:

Image

It is made of one kind of crossed hexagons

Ulrich
by Ulrich
Mon Mar 25, 2013 7:53 am
Forum: Polyhedron Models
Topic: Help with MW63
Replies: 22
Views: 59593

I made a similar model where the top vertices of the pentagrammic pyramids are pointing towards the center:

Image

I glued the model with UHU hart, no threads were needed.

Ulrich
by Ulrich
Mon Mar 11, 2013 12:53 pm
Forum: Polyhedra
Topic: Faceted snub cube
Replies: 13
Views: 45331

This is my model of Robert's facetted snub cube:

Image

I call it "24 scalars".

Ulrich