Search found 88 matches

by Peter Kane
Mon Jan 13, 2014 4:18 pm
Forum: Stella Forum
Topic: Problem importing DXF files
Replies: 3
Views: 13346

This is really a case of the blind leading the blind, because I haven't eny experience of importing models, but the Stella Help file says this: "If all else fails, and you can't find a way to create your favourite model in Stella4D, fear not! You can always import it from an external file. Currently...
by Peter Kane
Thu Aug 22, 2013 3:37 pm
Forum: Stella Forum
Topic: Sacred Geometry
Replies: 45
Views: 177294

It is not unusual for Ulrich to put a different spin on things...;-)

Pete K
by Peter Kane
Mon Jun 10, 2013 7:12 pm
Forum: Polyhedron Models
Topic: Faceted Polyhedron
Replies: 3
Views: 16935

It is a work of art - very fine.

pete k
by Peter Kane
Tue Apr 09, 2013 6:35 pm
Forum: Polyhedron Models
Topic: Help with MW63
Replies: 22
Views: 51066

That's a great model, Ulrich - made with such precision. I never considered using balsa cement, but this is the second time I've seen it recommended recently, so I'll get some UHU Hart and give it a try.

Pete K
by Peter Kane
Fri Mar 22, 2013 2:03 pm
Forum: Polyhedron Models
Topic: Help with MW63
Replies: 22
Views: 51066

Rob, Thanks for your comments. I'm not sure if this will work, but we discussed options for building vertex-connected polys here: http://www.software3d.com/Forums/viewtopic.php?t=210&highlight= If that doesn't work, look for my post "Delicate Flower or Triffid ?". After that, I stayed well clear of ...
by Peter Kane
Thu Mar 21, 2013 7:46 pm
Forum: Stella Forum
Topic: Great Icosahedron - complex core
Replies: 6
Views: 21591

Re: Great Icosahedron - complex core

I've made several Great Icosahedrons and have noticed that it isn't quite as stable as say a Great Dodecahedron. I'm using index cards or thick colored cardboard, but it still has a tendency to deform a little. I thought of gluing a complex core inside to add some stability. For the Great Icosahedr...
by Peter Kane
Thu Mar 21, 2013 7:19 pm
Forum: Polyhedron Models
Topic: Help with MW63
Replies: 22
Views: 51066

Thanks Guy. I still can't visualise it, but I think you are right. I coloured one of the back faces with Stella and five others were coloured the same. As there are 120 of these pieces, that suggest 120/6 = 20 planes. I think I'll set them all to white.

Cheers,

Pete K
by Peter Kane
Sun Mar 10, 2013 2:06 pm
Forum: Polyhedron Models
Topic: Help with MW63
Replies: 22
Views: 51066

I think I've worked it out: the back face of each side of a star arm should be the same colour as its front face.

Pete K
by Peter Kane
Sun Mar 10, 2013 1:45 pm
Forum: Polyhedron Models
Topic: Help with MW63
Replies: 22
Views: 51066

Help with MW63

I’m looking for some help with the 16th stellation of the icosidodecahedron (MW 63). This is a vertex-connected polyhedra. I’ve chosen special colour arrangement 2 (dodecahedral) so that the pentagonal faces are all the same colour, but stuck on what to do about the backs of the cells. The easy opti...
by Peter Kane
Thu Jan 03, 2013 9:13 am
Forum: Polyhedron Models
Topic: Cube and Octahedron
Replies: 3
Views: 14155

Rob, I used Stella to generate nets for the cube (how lazy can you get ?) and octahedron, but I used a compass to draw the curves (circular arcs). Even after all this time, I still only use a small percentage of Stella's capabilities, but that's because I can't sepnd as much time on my hobby as I'd ...
by Peter Kane
Thu Dec 27, 2012 11:26 am
Forum: Polyhedron Models
Topic: Cube and Octahedron
Replies: 3
Views: 14155

Cube and Octahedron

Just to show that I haven't been wasting my time over Christmas ;-) http://i1135.photobucket.com/albums/m629/polypete/CubeandOctahedron_zps82c0358c.jpg I saw a computer-generated image of this cube and its dual -the octahedron- and their common mid-sphere. Incidentally, if you ever need to glue anyt...
by Peter Kane
Tue Nov 06, 2012 9:18 am
Forum: Polyhedra
Topic: Gilson: Polyhedra - A New Approach
Replies: 19
Views: 38350

A great ruler & compass & skewer achievement! If only Euclid had been fond of kebabs, he might have produced an Elements 2.

Well done!

Pete K
by Peter Kane
Sat Nov 03, 2012 3:55 pm
Forum: Polyhedra
Topic: Gilson: Polyhedra - A New Approach
Replies: 19
Views: 38350

Hmm, don't know what happened there. I was mid-way through a post. I'll start again. I have created a mock-up model that I think illustrates the process that is used to create this polyhedron: http://i1135.photobucket.com/albums/m629/polypete/IMGP0748-B.jpg Each trapezium on the central yellow band ...
by Peter Kane
Fri Nov 02, 2012 8:31 am
Forum: Polyhedra
Topic: Gilson: Polyhedra - A New Approach
Replies: 19
Views: 38350

At first reading, I thought that this was pretty straightforward to construct. I assumed that there was plenty of leeway in the choice of the equatorial pentagons, but a first quick model has proven me wrong. I'll have to read the details more carefully next time. The maths in the subsequent section...
by Peter Kane
Wed Oct 31, 2012 3:27 pm
Forum: Polyhedra
Topic: Gilson: Polyhedra - A New Approach
Replies: 19
Views: 38350

I think Chapter 24 contains some equations or whatever they are - it keeps on saying it's simple - for the dimensions of the two types of pentagon. I wouldn't have a clue how to use them. I wonder if one way would be to make a couple of seven sided "pyramids" , and to mount them on a pencil or the ...