Search found 49 matches
- Thu Dec 11, 2008 7:37 am
- Forum: Stella Feature Requests
- Topic: Creating convex polychora from vertices
- Replies: 14
- Views: 76687
Here's a good way to impliment the remove vertices feature: left click on vertex - removes vertex, finds convex hull of remaining verts right click on vertex - highlights vertex to allow many to be removed at same time left click on vertex after several are highlighted - removes vertex and all highl...
- Tue Dec 09, 2008 11:31 pm
- Forum: Stella Feature Requests
- Topic: Creating convex polychora from vertices
- Replies: 14
- Views: 76687
The potential "generate polychoron/polyhedron from vertices" feature could also use a set of selected vertices from a model as well as an OFF file - lets say I wanted to generate the heptachoron - a step tegum, I could load up the 7-7 duoprism, select the correct 7 vertices - then activate the conve...
- Sat Oct 25, 2008 8:19 pm
- Forum: Stella Feature Requests
- Topic: My Reccommendations
- Replies: 5
- Views: 30014
- Mon May 05, 2008 6:25 am
- Forum: Polyhedra
- Topic: Polyhedral Chess Set
- Replies: 5
- Views: 39652
- Fri May 02, 2008 9:04 pm
- Forum: Stella Feature Requests
- Topic: Truncation Rotation
- Replies: 7
- Views: 49235
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 ...
- Fri May 02, 2008 9:44 am
- Forum: Stella Feature Requests
- Topic: Truncation Rotation
- Replies: 7
- Views: 49235
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...
- Thu May 01, 2008 10:35 pm
- Forum: Stella Reviews and Testimonials
- Topic: Stella4D, a must have for Polychoronists
- Replies: 0
- Views: 31173
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...
- Thu May 01, 2008 10:29 pm
- Forum: Stella Feature Requests
- Topic: Truncation Rotation
- Replies: 7
- Views: 49235
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 ...
- Thu May 01, 2008 5:58 am
- Forum: Stella Forum
- Topic: Filling cross-sections
- Replies: 11
- Views: 36725
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...
- Thu May 01, 2008 5:44 am
- Forum: Stella Feature Requests
- Topic: Truncation Rotation
- Replies: 7
- Views: 49235
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...
- Mon Apr 07, 2008 2:28 am
- Forum: MineSweeper3D Forum
- Topic: Just released version 2.5.1 with 3 new boards!
- Replies: 3
- Views: 33654
- Sun Apr 06, 2008 4:00 am
- Forum: Stella Forum
- Topic: Filling cross-sections
- Replies: 11
- Views: 36725
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...
- Sun Apr 06, 2008 3:42 am
- Forum: MineSweeper3D Forum
- Topic: Just released version 2.5.1 with 3 new boards!
- Replies: 3
- Views: 33654
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...
- Thu Apr 03, 2008 11:41 pm
- Forum: Stella Forum
- Topic: Filling cross-sections
- Replies: 11
- Views: 36725
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...
- Wed Apr 02, 2008 5:05 am
- Forum: Stella Forum
- Topic: Filling cross-sections
- Replies: 11
- Views: 36725
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 ...