Search found 46 matches

by Jabe
Mon May 05, 2008 6:25 am
Forum: Polyhedra
Topic: Polyhedral Chess Set
Replies: 3
Views: 17984

The cuboctahedron might be a good choice, its vertex figure is a rectangle which consists of two L's - the L move is a nights move. Oh by the way, hope ya'll had a good May 4th, and "May the Fourth be with you"
by Jabe
Fri May 02, 2008 9:04 pm
Forum: Stella Feature Requests
Topic: Truncation Rotation
Replies: 7
Views: 23029

That graphic was a lot of fun to make too, let me know if you want the .stel file. The vertex grab idea would be perfect for this, make sure that mouse inertia is included so we can watch the rotations in action - a good name for this feature might be "kaleidoscope" - any chance it could be used on ...
by Jabe
Fri May 02, 2008 9:44 am
Forum: Stella Feature Requests
Topic: Truncation Rotation
Replies: 7
Views: 23029

Whew! - pulled an all nighter on this graphic - it helps shows how grombate rotation would work - notice that the truncate and rhombate rotations are sub-sets - I also went full 360 degrees, so each polyhedron shows up twice on opposite sides of each other - here are two views: http://www.polytope.n...
by Jabe
Thu May 01, 2008 10:35 pm
Forum: Stella Reviews and Testimonials
Topic: Stella4D, a must have for Polychoronists
Replies: 0
Views: 14382

When I first started exploring polychora back in 1990, all I had was a pen and some paper - and therefore the best graphics I could play with were some hand drawn vertex figures and some sections of the simpler ones. Now only 18 years later, we have Stella4D - which can view all known uniform polych...
by Jabe
Thu May 01, 2008 10:29 pm
Forum: Stella Feature Requests
Topic: Truncation Rotation
Replies: 7
Views: 23029

We can think of the great rhombation in the following way, if we move the corner along the edge - it would mimic the truncation feature, if we go between the edges (towards the square face in the cube) it would mimic rhombation, in between we would find various gircoes, where the center has regular ...
by Jabe
Thu May 01, 2008 5:58 am
Forum: Stella Forum
Topic: Filling cross-sections
Replies: 11
Views: 23055

Recently I investigated the verfs of two of the blends, I picked one to be orientable but with a 0-density region, and the other one to be non-orientable with a region inside which "seemed" to act as a density 2 region - after manipulating them I was able to find a way to expose each internal region...
by Jabe
Thu May 01, 2008 5:44 am
Forum: Stella Feature Requests
Topic: Truncation Rotation
Replies: 7
Views: 23029

Truncation Rotation

Many years ago I played with something that I call "truncation rotation" - see the following pic: http://www.polytope.net/hedrondude/TRROTATE.JPG What it does is start with a polyhedron and truncate it through many forms which will then cycle back to the begining - in the above example we start with...
by Jabe
Mon Apr 07, 2008 2:28 am
Forum: MineSweeper3D Forum
Topic: Just released version 2.5.1 with 3 new boards!
Replies: 3
Views: 14851

robertw wrote:
Jabe wrote:I voted for the third one.
You sure? That's the one I voted for, but it only shows one vote
Oops, must a pushed the wrong button, glad it didn't have a mine - but then again I liked the first one a lot too.
by Jabe
Sun Apr 06, 2008 4:00 am
Forum: Stella Forum
Topic: Filling cross-sections
Replies: 11
Views: 23055

Actually filling in the gad cells completely would be like filling in the octagrams of groh completely (which we do when making models) We normally do fill it in, that's true, and you're right that we could consider them membranes. But a cross-section should then still show the regions below them a...
by Jabe
Sun Apr 06, 2008 3:42 am
Forum: MineSweeper3D Forum
Topic: Just released version 2.5.1 with 3 new boards!
Replies: 3
Views: 14851

That was a hard vote, I liked all three nearly the same. I like the first one due to the enneagons, the second one due to its attractive shape, the third one for its challenge, I voted for the third one. I also noticed that the polyhedra won't spin like they used to (I like to spin them real fast af...
by Jabe
Thu Apr 03, 2008 11:41 pm
Forum: Stella Forum
Topic: Filling cross-sections
Replies: 11
Views: 23055

For the problem with this, see example in my post above. The polyhedron is non-orientable, but the cross-section, a pentagram, is orientable. If I fill the pentagram's centre, then the cross-section would be incorrect, since the polyhedron has a hole there. I presume the same error could occur in 4...
by Jabe
Wed Apr 02, 2008 5:05 am
Forum: Stella Forum
Topic: Filling cross-sections
Replies: 11
Views: 23055

One possible idea for filling a polychoron's sections would be to fill it's cells according to their orientability as opposed to the orientability of the polychoron itself, for instance - if it has giddies and gads within it, fill the giddies like they are non orientable, and the gads like they are ...
by Jabe
Sun Mar 16, 2008 10:59 pm
Forum: Polyhedra
Topic: Polyhedral puzzles
Replies: 1
Views: 10907

These were fun, I got all of them right too. :D
by Jabe
Fri Jan 25, 2008 8:11 am
Forum: MineSweeper3D Feature Requests
Topic: Ideas For New Boards
Replies: 11
Views: 34284

Iquipadah section

I would like to see the .5 section of iquipadah as seen in the pic.

Image

the octagon with square hole could first be subdivided into four squares and four triangles.
by Jabe
Tue Jan 22, 2008 7:33 am
Forum: Stella Forum
Topic: More 4D compounds now available
Replies: 51
Views: 98803

Here's an idea that might help Stella render these "unStellable" scaliforms and compounds, could we not only define the vertex figure, but also give it a cover figure to help Stella find the polychoron - here's an example, for sistakix - we could take Hi's verf, and find the embedded 10-tet verf wit...