Search found 78 matches

by guy
Fri Jul 26, 2013 4:54 pm
Forum: Stella Forum
Topic: Sacred Geometry
Replies: 45
Views: 176745

@3katie3. The centre of a triangle does look lopsided when seen from the side. One extremity of the triangle, say the left, will be a corner and a long way from the centre. The other extremity, say the right, will be an edge which passes much closer to the centre. When you spin the triangle about it...
by guy
Mon Jul 22, 2013 8:13 pm
Forum: Polyhedron Models
Topic: How do I make this star?
Replies: 9
Views: 28863

Hi,

I cannot see the image of the star, it just shows a small box where the image should be.
by guy
Wed Jun 05, 2013 7:53 pm
Forum: Polyhedron Models
Topic: Faceted Polyhedron
Replies: 3
Views: 16887

Je l'aime.
C'est comme les dodecaèdres etoilés de M. C. Escher, mais avec plus de troux. Ou sont les lézards? ;)

I like it.
It's like the stellated dodecahedra of M.C. Escher, but with more holes. Where are the lizards? ;)
by guy
Tue Apr 02, 2013 9:35 pm
Forum: Polyhedron Models
Topic: How do I make this little beauty, please?
Replies: 9
Views: 47485

One interesting opportunity here comes from the fact that the faces come in parallel sets. On each side, one face from the small stellated dodecahedron is parallel to one from its great stellated cousin. Since these figures have opposite sides, also parallel, that makes four parallel faces in all. S...
by guy
Mon Mar 18, 2013 8:33 pm
Forum: Polyhedron Models
Topic: Help with MW63
Replies: 22
Views: 50752

Hi Peter, The backs lie in the 20 face planes of the icosahedron. These correspond to the 20 vertices of the dodecahedron, so matching them with the 12 pentagonal faces doesn't work. You could match the corners of each triangle to the 12 faces, which is of course the "same back and front" solution y...
by guy
Fri Mar 01, 2013 10:13 pm
Forum: Polyhedron Models
Topic: Zonohedrified Crossed Heptagrammic Cupolaic Blend
Replies: 4
Views: 16692

C'est magnifique!
by guy
Mon Nov 05, 2012 10:03 pm
Forum: Polyhedra
Topic: Gilson: Polyhedra - A New Approach
Replies: 19
Views: 38123

Looks really cool. Congratulations.
by guy
Thu Nov 01, 2012 9:00 pm
Forum: Polyhedra
Topic: Gilson: Polyhedra - A New Approach
Replies: 19
Views: 38123

Hi, This is not an easy figure to construct. Some dimensions are arbitrary, but there are some determined relationships too. I find the maths to be awkwardly developed. Personally, if I were working out coordinates I would use polar in the XY plane and Cartesian in the Z. And if you don't understand...
by guy
Fri Oct 05, 2012 6:23 pm
Forum: Polyhedra
Topic: Gilson: Polyhedra - A New Approach
Replies: 19
Views: 38123

OK, I have now read Gilson's book. Sadly I can recommend it only to the most hardened polyhedron enthusiast (like me) ;) . Others will find it badly wanting. Its approach purports to be based on symmetry, and to focus on polyhedra having a single major axis of symmetry, such as a regular prism. It i...
by guy
Thu Sep 27, 2012 7:59 pm
Forum: Polyhedra
Topic: Gilson: Polyhedra - A New Approach
Replies: 19
Views: 38123

Thanks for the heads-up. I just ordered my copy before replying :)
by guy
Tue Jul 03, 2012 7:55 pm
Forum: Polyhedra
Topic: Faceted snub cube
Replies: 13
Views: 39930

@Kathy, Yes, I can see it fine - and if my clunky box can see it, most anybody can. Lovely model! As a follow-up to my previous post, I am told that it does not have a regular "abstract" structure. In fact it is possibly the only known noble and self-dual polyhedron that is not regular in structure.
by guy
Sat Jun 30, 2012 3:21 pm
Forum: Polyhedra
Topic: Faceted snub cube
Replies: 13
Views: 39930

Its self-duality just made me realise that its abstract form appears to be regular, so we could write it as {5 5} V-E+F = 24-60+24 = -12 so topologically it is a toroid of genus (2-(-12))/2 = 7 (where V = number of vertices, E = number of edges, F = number of faces). I wonder if this regular abstrac...
by guy
Wed May 02, 2012 6:33 pm
Forum: Polyhedron Models
Topic: Construction de mes polyèdres en bois
Replies: 7
Views: 25451

What kind of translator ignores ne ... pas ?

I don't use CNC either ;)
by guy
Sat Dec 10, 2011 9:44 pm
Forum: Polyhedron Models
Topic: Can you see what this is ?
Replies: 3
Views: 13963

Ten cubes? Aren't there four of each colour, making 4 x 5 = 20 in all?
by guy
Thu Oct 13, 2011 9:12 pm
Forum: Polyhedron Models
Topic: Wood Polyhedrons
Replies: 3
Views: 15555

Have you tried gluing the plywood polygons together? Might need reinforcing strips behind each joint, pre-glued to one polygon like tabs on a paper model. Those would also need to be carefully profiled with the right angle.