WebGL Julia Set | Hacker News Reader

WebGL Julia Set

jonathan-potter.github.io

70 pointsroombarampage22 comments

This project was built using code I wrote previously for this pure javascript fractal renderer: http://jonathan-potter.github.io/Mandelbrot/

Jamie Wong's post on hacker news earlier this week was a massive help in allowing me to switch to using WebGL for the rendering portion. His post can be found here: http://jamie-wong.com/2016/07/06/metaballs-and-webgl/

Nothing showing up on iOS. Is it missing some extensions?

mobile was working earlier... not sure what is going on. looking into it now. works on desktop though >_<

Works fine on iOS 10/Safari

I got mobile fixed on my ios devices. I don't really have the tools for testing android at home. anyone want to confirm for me?

No luck on android 5.1.0 with Chrome 47.0.2526.83 for me, just a black screen. No errors in the console either. Sorry I can't give you a more helpful description.

edit: that's for the submitted link, http://jonathan-potter.github.io/Mandelbrot/ works fine.

Also works fine on Android 4.3 with the latest Chrome version.

Blank screen on Android as well

That's funny. I spent the weekend making a Mandelbrot set renderer using the same tutorial:

https://github.com/andrelaszlo/webgl/

It needs a little refactoring, and probably only works in Chrome.

very cool :) that tutorial was very helpful

If you zoom in, then the oscillations get amplified and it because rather difficult to see anything.

There are a lot of noisy visual artifacts over time. Seems like just one sample per pixel?

You also may want to look at https://linas.org/art-gallery/escape/smooth.html

Complex numbers offer an orthogonal dimension to the integer number line , where multiplication aquires a rotational element. This allows intermediate 90° (π/2) multiplication and Julia's Set is shown to be a map to Madelbrot's Fractal. https://acko.net/blog/how-to-fold-a-julia-fractal/

Also the fourier transform is much more obvious in the imaginary plane. https://acko.net/tv/toolsforthought/

That the Julia set and the Mandelbrot set are covariant maps on the 2D complex plane hints at the higher dimensional shape that surface Z^x + c = 0 describes.

I like fractal renderers, I made one in Haskell[1] once. In only 41 lines of code (23 if you strip white lines and type sigs). It also makes a post of its output combined with the code[3]; warning 18MB PDF (sorry Github).

[1] https://github.com/cies/haskell-fractal

[2] https://github.com/cies/haskell-fractal/blob/master/fractal....

[3] https://github.com/cies/haskell-fractal/blob/master/poster.p...

I made one in one line of python:

for a in range(900):print"\n.x"[(a%30>0)+(abs(reduce(lambda z,c:zz+c,[a%30.1-2+1j(a/30.1-1.5)]*30))<2)],

For a code golf on stackoverflow

I like this a lot! Well done. Some * symbols for eaten by HN though, you can put spaces around them.

You should add a stop button for the animation, and also fix the back button. Using URL fragments for this is ridiculous.

I like the stop button idea, but there are some considerations that I need to work through before I can add it in.

the intention behind using the url hash for application state is to allow sections to be debugged and sent as links. that said, I may rip it out in place of a smooth zoom when I get time.

You could adjust the URL hash without pushing the change onto the history stack -- that gets you the best of both worlds.

Looks like this has been implemented now, but I can't find any way to zoom back out!

Looking at it moving for more than 3 seconds made me quite nauseous if I zoomed in.

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