Tweet Archive 2018 10
Replying to @ungarjo
With a south-polar projection the numbers could go clockwise.
When it doesn’t matter if this was posted as a photo or as a rendering demo. https://twitter.com/Gilenlinn/status/1046531452714831872
Replying to @divbyzero and @KelseyAHE
There’s a market for a chalkboard/whiteboard/ink pen that draws dotted lines.
Coincidence is meaningful. Is that backwards? Else anything backwards read, when sense makes only this.
Replying to @tim_hutton
(“This only makes sense when read backwards. Anything else backwards that is meaningful is coincidence.”)
Much better examples of word-level palindromes here: http://www.kmjn.org/notes/word_unit_palindromes.html
“Mind your own business: Own your mind.”
“Escher, drawing hands, drew hands drawing Escher.”
RT @davidschneider: Roses are red The Tories don’t listen They press on with Brexit And prompt this from Nissan.
Happy #NationalPoetryDay!…
Replying to @jtmaths
It must be a rhombic dodecahedron.
And yet there are those in the UK who would open up the NHS to privatisation. https://twitter.com/APWestRegion/status/1047632131063726080
Replying to @richturton
Floating-point errors. This simulation has been running for too long.
Replying to @DrCDArmstrong
The Bayer pattern. https://en.wikipedia.org/wiki/Bayer_filter
It uses more green than red or blue to ‘mimic the physiology of the human eye’.
Replying to @roice713
Can you do the airfoil version of the Joukowsky transform, just for fun? https://en.wikipedia.org/wiki/Joukowsky_transform
Replying to @jgrahamc
BREAKING: WebAssembly coming to the BBC Micro. Big news if true!
I really hope they make a rhombic docahedron version of this, because then the reflections will actually line up. (I think?) https://en.wikipedia.org/wiki/Rhombic_dodecahedral_honeycomb A cube would work too but would be a bit dull. What other shapes would work? https://twitter.com/tweetsauce/status/1022911077984755713
Replying to @VRCryptocoins
None of the stellations of the dodecahedron tessellate 3D space.
Replying to @VRCryptocoins
Euclidean space, that is. The dodecahedron itself tesselates hyperbolic space, e.g. https://en.wikipedia.org/wiki/Order-4_dodecahedral_honeycomb (I wonder if we can make that using curved mirrors?)
“My parents wouldn’t let me shave [my head] earlier, so I made a PowerPoint presentation to convince them. I strategically put pictures of bald women in there. My dad was laughing so hard the whole time he couldn’t even pay attention.” https://variety.com/2018/politics/news/emma-gonzalez-parkland-interview-1202972485/
Replying to @3Dmattias, @METAbeyond and @Flexi23
Yes, this is the cube version, there are a few versions around. But I’ve never seen a rhombic dodecahedral version.
Replying to @tim_hutton
Wikipedia image request: we really need an image of what it’s like being inside the rhombic dodecahedral honeycomb. Maybe @roice713 or @henryseg this would be easy with your software?
Replying to @VRCryptocoins
Just came across this. Is this what you had in mind? Wasn’t the 3D grid thing I had in mind but still super cool. https://twitter.com/Rainmaker1973/status/982925443283259392
Replying to @VRCryptocoins
The same idea, showing how to make all the platonic solids: https://www.youtube.com/watch?v=zTS9SN18E58
Replying to @tim_hutton
Here’s a dodecahedral version, suffering from the same ‘problem’ that they don’t line up nicely to make a 3D space: https://www.youtube.com/watch?v=U4jQZxLugzA
Replying to @roice713, @Sabetta_ and @henryseg
Perfect, thanks!
Replying to @apgox
If the mirrors in the polyhedron bulged inwards slightly, would it look like hyperbolic space inside?
Replying to @apgox
Yes, I see it now, thanks. It has an intriguingly similar appearance - to explore the idea in 2D I made this povray image of a square room with mirrored cylindrical walls bulging inwards slightly. The actual floor is visible at the bottom, everything else is reflections.
Replying to @apgox
And just for completeness, a cube with inward-bulging mirrored spherical faces:
If you stand inside the cubical space made by the intersection of six mirrored spheres it feels a little bit like being in hyperbolic space. As @apgox points out it isn’t the same but it makes pretty images none the less.
Bonus image: the 2D version, with 4 cylindrical walls.
Replying to @roice713, @apgox, @vihartvihart, @AndreaHawksley, @Sabetta_ and @henryseg
Yes, great paper. I used POV-Ray, with very simple textures (like pigment { color Red } finish { reflection 0.7 } ). The organic feel is just a happy accident. I’ve just noticed the 3 orthogonal color rings at infinity. I can share the files if anyone wants them.
When our cat is at her most comfortable she will reach out and ever so gently rest a single claw against my jugular, then close her eyes contentedly.
Replying to @bendwavy, @roice713 and @henryseg
I made one with Curved Spaces and put it here: https://en.wikipedia.org/wiki/Rhombic_dodecahedral_honeycomb
RT @Awfidius: @dimadamen @Michael_J_Black When we were presenting David with his BMVA Distinguished Fellowship in 2011, we reassembled his…
People don’t want Brexit any more. We’ll be at the #PeoplesVoteMarch in London on Saturday calling for politicians to wake up to this fact. It’s absolutely not what I want to be doing with my weekend but this is too important an issue. http://uk.businessinsider.com/brexit-polls-show-britain-wants-to-remain-in-eu-2018-9
Replying to @tim_hutton
Holy. Flip. That was big. Estimates now of 670,000 people at the march today. The cheer waves that went down Green Park were extraordinary. All ages. All well-behaved and very cheeky and energised.
RT @Simon_Gregg: @RodBogart @icecolbeveridge @Dragon_Dodo @Gelada @mathhombre @chalkdustmag @mathinyourfeet @PuntMat @dandersod @DavidKButl…
Replying to @robinhouston
4chan is the new arxiv?
Dodecagon-hexagon-square Truchet tiles. Any tile can be rotated into multiple positions to make a new pattern. https://twitter.com/Simon_Gregg/status/1055053543957241856
Replying to @apgox and @ladyjadeamanda
Thanks Adam! Nice talk.
Adam’s 6-minute talk from April 2018, with exciting glimpses of cellular automata and the key problem in artificial life.
His GPU-powered artificial chemistry engine is here: https://gitlab.com/apgoucher/hex13 https://twitter.com/apgox/status/1055062613309247488
Note to self: have a small mirror handy when you get a new webcam so that you can show people what it looks like.
RT @xpuigc: Ron Lawson b.1960
RT @ArchDaily: Pavilion UGUNS / DJA https://goo.gl/miPtFr
RT @henryseg: Video version of the instruction booklet for our @MathMechs extensor construction kit! https://youtu.be/eIlhcfUvt-o
Replying to @JimPropp
All wishes must comply with the Novikov self-consistency principle. https://timhutton.github.io/2014/01/23/36692.html