Search found 83 matches
- Mon Aug 17, 2009 12:22 pm
- Forum: Polyhedra
- Topic: Compound of Two Deltahedra
- Replies: 10
- Views: 57668
Compound of Two Deltahedra
Due to a never-ending tale of woe with broken computers I haven't got access to Stella at the moment... You know the "deltahedron" - same edges as the regular dodecahedron, pentagonal dimples each comprising 5 equilateral triangles, the polyhedron is actually a stellation of the icosahedron? If you ...
- Wed May 13, 2009 7:29 am
- Forum: Polyhedron Models
- Topic: Dodecahedral Shape-shifter
- Replies: 2
- Views: 19174
- Thu Mar 19, 2009 3:14 pm
- Forum: Polyhedron Models
- Topic: New Rubik's Cube-style puzzle made from paper
- Replies: 4
- Views: 36459
- Fri Aug 15, 2008 7:25 am
- Forum: Stella Forum
- Topic: "Stella Models" paper now online
- Replies: 1
- Views: 11926
- Mon Mar 03, 2008 6:17 am
- Forum: Polyhedra
- Topic: What was your introduction to polyhedra?
- Replies: 21
- Views: 113637
- Tue Feb 26, 2008 6:49 am
- Forum: Polyhedra
- Topic: Books about Polyhedra
- Replies: 10
- Views: 58754
Re: Cundy & Rollett
Indeed, if you don't have internal braces of some kind or stiffen the paper somehow, the finished five-cubes paper model has an annoying tendency to "pop in" at its octavalent re-entrant vertices. If you use double tabs and continue the tabs where the edges form pentagrams - do it pin-wheel style w...
- Mon Feb 25, 2008 4:06 pm
- Forum: Polyhedra
- Topic: Books about Polyhedra
- Replies: 10
- Views: 58754
- Tue Feb 19, 2008 11:47 am
- Forum: Polyhedron Models
- Topic: Paper model choices. Scissors/knife? Single/double tabs? etc
- Replies: 24
- Views: 227063
Material - 160gsm coloured card (I have about 30 colours) Adhesive - Balsa Cement Scoring - I draw the net with a 9H pencil Cutting out - Stanley knife Tabs - double tabs I tend to make a template on thicker card. I staple together several sheets of 160gsm and pinprick through with an old compass po...
- Tue Feb 12, 2008 7:02 am
- Forum: Polyhedron Models
- Topic: What's the most complex model you've ever made?
- Replies: 32
- Views: 182406
Small inverted retrosnub icosicosidodecahedron From facial planes printed by Dino George No picture available. I half completed that snub with 4 triangles and a pentagram at each vertex (shaped like a narrow pentagram). Had to give up after complaints about the language from next door neighbour. For...
- Tue Feb 05, 2008 8:32 am
- Forum: Stella Feature Requests
- Topic: Tabs?
- Replies: 9
- Views: 54210
Good topic! I invariably use double tabbing now. Sometimes (e.g. regular compound of Five Cubes with dodecahedral symmetry) two or three facets have collinear edges, so I will use a common tab to maintain linearity and increase the rigidity of the model. I have to admit I find it a pain getting tabs...
- Tue Jan 29, 2008 12:45 pm
- Forum: Stella Feature Requests
- Topic: Creating convex polychora from vertices
- Replies: 14
- Views: 76620
That's the zonohedrification of the dodecahedron. Just load a dodecahedron in Stella and hit "z" (or "Poly->Zonohedrify"). Stella can then print nets for you, and show angles if you need them. Here's one I made out of paper: http://www.software3d.com/Enneaconta.php Rob. It looks good! I had in mind...
- Tue Jan 29, 2008 5:48 am
- Forum: Stella Feature Requests
- Topic: Creating convex polychora from vertices
- Replies: 14
- Views: 76620
As far as 4D OFF is concerned, they can be read in without cells or edges being defined, as this is what HEDRON produces. It does fail without faces though. A 3D OFF with vertices only does work as that was the method I used to generate a number of the sub-zonohedrifications of the dodecahedron at ...
- Mon Jan 21, 2008 9:14 am
- Forum: Polyhedra
- Topic: What was your introduction to polyhedra?
- Replies: 21
- Views: 113637
It can indeed be done in Stella, although it was a little tricky. Click here to download the .stel file Once in Stella you can print out the nets :D http://i225.photobucket.com/albums/dd237/RobertCWebb/Tetrahedra4C.gif Great! Can you show me how to do this with Stella? It would be interesting to se...
- Mon Jan 21, 2008 9:10 am
- Forum: Polyhedra
- Topic: What was your introduction to polyhedra?
- Replies: 21
- Views: 113637
Re: Six pentagrammatic prisms
Here's the compound of six with dodecahedral symmetry. And I couldn't resist making the compound of twelve by merging the six with its mirror image. :o Same set of 60 corners, now two prisms per each: http://members.aol.com/Dinogeorge/Twelve52prisms.gif Do you notice a certain similarity to Miller'...
- Mon Jan 21, 2008 9:08 am
- Forum: Polyhedra
- Topic: What was your introduction to polyhedra?
- Replies: 21
- Views: 113637
Re: Six pentagrammatic prisms
Yes! I meant six...Dinogeorge wrote:Are you sure you don't mean six pentagrammatic prisms? Five of those prisms have only 50 corners, a number that doesn't evenly divide 120, the order of the icosahedral symmetry group.