tim_hutton

12 ms·

91.
by tim_hutton 14y ago
There's a new champion. Now up to 240 million steps! I think it will be interesting to be sure that we've found the final champion - there is such a large range of behaviours. And yet amazingly there are only 65536 of these turmites. http:
92.
Busy Beaver Turmite Challenge(conwaylife.com)
1 points by tim_hutton 14y ago|1 comments
93.
by tim_hutton 14y ago
Related: visualizing how the Mandelbrot maps onto itself: http://code.google.com/p/mandelstir/
94.
Ready 0.5 - cellular automata on arbitrary polygonal and polyhedral meshes(ferkeltongs.livejournal.com)
1 points by tim_hutton 14y ago|0 comments
95.
by tim_hutton 14y ago
The SmoothLifeConfig.txt doesn't have a line for SmoothLifeL - it should, Stephan! Here it is: 2 1 10.0 3.0 10.0 0.100 0.257 0.336 0.365 0.549 2 4 4 0.028 0.147 // SmoothLifeL Put this at the top of SmoothLifeConfig.txt and run the exe. You
96.
by tim_hutton 14y ago
I see something about a circle that contains the eigenvectors of a matrix. How does that apply here?
97.
by tim_hutton 14y ago
Another thing about the 74 minutes. That was for a larger radius than necessary and a smaller timestep than necessary - for a high quality video. With a radius of 10.0 and a timestep of 0.1 I get 186fps on the same graphics card - visually
98.
by tim_hutton 14y ago
SmoothLife uses two disks around each point to determine the instantaneous rate of change. Inside each disk the values are summed. This is a convolution with a disk filter. http://en.wikipedia.org/wiki/Convolution As it says on that page,
99.
by tim_hutton 14y ago
Ready is using OpenCL. But Stephan is using FFT for the convolution with a disk filter, which is a big win for large radii.
100.
by tim_hutton 14y ago
I made an implementation of SmoothLifeL in Ready and this video. Stephan Rafler created the SmoothLife rules and has his own software. Ready is designed to let the user play with a large range of systems like this one, connecting a field of
101.
by tim_hutton 14y ago
Original post: https://plus.google.com/110214848059767137292/posts/WtPBhYJs... Technical details on the YouTube page: https://www.youtube.com/watch?v=KJe9H6qS82I (Two lots of source code available: Stephan's and mine) Other discussions
102.
by tim_hutton 14y ago
On Reddit it triggered a discussion about how we could make a continuous version of the Game of Go. http://www.reddit.com/r/compsci/comments/118svz/smoothlife_a...
103.
SmoothLife - a continuous version of Conway's Game of Life(plus.google.com)
3 points by tim_hutton 14y ago|0 comments
104.
The U-Skate World, a newly-discovered continuous CA that supports gliders.(youtube.com)
1 points by tim_hutton 14y ago|0 comments
105.
by tim_hutton 14y ago
By converting to indexed color first (in Gimp: Image > Mode > Indexed) we can turn off the dithering. I would be interested to know if this looks bad on anyone's screen. http://picasaweb.google.com/lh/photo/asf1q9Da0w0PwN8PoadpVtM.
106.
by tim_hutton 14y ago
Just a thought - are you in True Color (32-bit) mode?
107.
by tim_hutton 14y ago
OK. Well I guess this supports the original poster's motivation, that animated GIFs can't be relied on.
108.
by tim_hutton 14y ago
Could it be just because we've got our monitors set to different gammas? Here's a frame from the animated gif, which still looks fine to me: https://picasaweb.google.com/lh/photo/oaNDcnogej-bbrArcXuzK9... Does this look dithered to anyone
109.
by tim_hutton 14y ago
That's really interesting. I'm on Windows 7. Just tested in Debian Linux and it's fine there too. Must be a Mac issue? (Edit: I confirm that I can see faint green spots all over the background in your Photoshop screenshot.)
110.
by tim_hutton 14y ago
It looks perfect in Firefox and Chrome and IE and locally, for me. The slightest of banding on the tab, now I come to look for it. I guess you're using a browser that doesn't render animated GIFs very well.
111.
by tim_hutton 14y ago
But... 71KB for the whole animation as a GIF: https://picasaweb.google.com/lh/photo/k-JwpH7ZluIb2Mn0rna1PN... Gimp, Filters > Animation > Optimize (for GIF)
112.
Animating how the Mandelbrot maps onto itself, by "stirring"(code.google.com)
4 points by tim_hutton 14y ago|0 comments
113.
by tim_hutton 14y ago
New Scientist wrote an article on this: http://www.newscientist.com/article/dn22134-first-gliders-na...
114.
by tim_hutton 14y ago
Yes, I think that's right. This page talks about De Bruijn's pentagrids method, which uses the same rhombi ribbons as the glider travels on as the axes of the 5D space: http://www.ams.org/samplings/feature-column/fcarc-ribbons Five possib
115.
by tim_hutton 14y ago
You've heard of Conway's Game of Life, a cellular automata (CA) on a square grid. There the glider travels over a nice repeating grid. Now imagine that the grid itself is changing underneath the glider - it will just fall apart. That's what
116.
First glider discovered in a cellular automata on an aperiodic tiling(plus.google.com)
182 points by tim_hutton 14y ago|28 comments
117.
Show HN: Run Turing's reaction-diffusion on your own meshes(code.google.com)
1 points by tim_hutton 14y ago|0 comments
118.
by tim_hutton 14y ago
DON'T LOOK AT THAT IMAGE!!!
119.
by tim_hutton 14y ago
"two diameters to starboard" - to the right of the ISS? Or in the direction of the stars? :)
120.
by tim_hutton 14y ago
You'll see the Earth behind in a few minutes when the ISS crosses back into day: http://www.isstracker.com/ http://www.timeanddate.com/worldclock/sunearth.html

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