Lorenz Attractor in 101 bytes of JS

https://gist.github.com/1320178

by dbaupp • 14 years ago

65 21 14 years ago

gist.github.com

gbadman• 14 years ago

Link to play with it: http://plnkr.co/edit/UFLKBx

Hint: Hit the eye icon on the right for live preview.

jashkenas• 14 years ago

Very neat. Attractors + <canvas> are a lot of fun...

My favorite is the Peter de Jong attractor, described here: http://paulbourke.net/fractals/peterdejong/

Here's a <canvas> version. Click and drag and release to re-seed the starting coordinates: http://jashkenas.s3.amazonaws.com/misc/deJong/deJong.html

Here's the annotated source code: http://jashkenas.s3.amazonaws.com/misc/deJong/docs/deJong.ht...

Edit: I've added a permalink button, so that you can link directly to interesting coordinates that you discover: http://jashkenas.s3.amazonaws.com/misc/deJong/deJong.html#59...

dbaupp• 14 years ago

In the comments on the gist there is a canvas version too: http://fiddle.jshell.net/aemkei/d99PL/show/

tholman• 14 years ago

http://jashkenas.s3.amazonaws.com/misc/deJong/deJong.html#-2...

beneater• 14 years ago

Here's a quick port to Khan Academy's new CS scratchpads: http://www.khanacademy.org/cs/lorenz-attractor/966238447

ehosca• 14 years ago

ITT Schaub- ?

jianshen• 14 years ago

Nostalgic! Fractals are what got me interested in programming when I was a student because I always wanted to know how to "draw infinitely".

julian37• 14 years ago

This looks just like the C code on Paul Burke's page [1], except that the translation to JS isn't quite correct because x gets updated before yz are calculated (and y before z) due to sequential parameter evaluation. And the 101 bytes conveniently doesn't count any of the rendering and other code.

The result is still pretty, but that's a bit too much handwaving for my taste.

[1] http://paulbourke.net/fractals/lorenz/

blorenz• 14 years ago

Good use of 101 bytes! I'm attracted to it.

jahewson• 14 years ago

Great. It's just a shame about the boneheaded "DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE". It makes you look like a complete idiot.

sp3323• 14 years ago

It's really not worth licensing hassle for this amount of code.

ctdonath• 14 years ago

It's really not worth dragging otherwise nifty code into the gutter with unnecessary obscenity.

"Public domain" would suffice. Yes, a significant percentage of the population does have a problem with needless obscenity.

cshesse• 14 years ago

Which I suppose is why there's a 2:1 license-to-code ratio for this project.

wccrawford• 14 years ago

Wouldn't that be even more reason to just pick a license that doesn't ruffle feathers? BSD is nice. So is MIT. Says the same thing but doesn't get people to post "Why'd you pick that license?" posts.

0x0• 14 years ago

Claiming 101 bytes feels a bit like cheating, since you need a bunch of setup and painting code to drive the algorithm, don't you think? :)

karpathy• 14 years ago

I ported this to the newly announced Khan Academy CS sandbox :)

http://www.khanacademy.org/cs/lorenz-attractor/966338554

bdon• 14 years ago

Not quite 101 bytes, but here's an interactive version in WebGL:

http://bdon.github.com/strange_attractor/

(Only works in Chrome)

Lorenz Attractor in 101 bytes of JS

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