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Title: Froth swirl
Post by: simon.snake on February 14, 2013, 08:00:19 PM

Froth swirl

(http://nocache-nocookies.digitalgott.com/gallery/13/6528_14_02_13_8_00_19.png)

http://www.fractalforums.com/index.php?action=gallery;sa=view;id=13430

Here we have a 800x800 anti-aliased swirl which was generated from an 8000x8000+ image generated in FractInt.

Click http://www.needanother.co.uk/uploads/Swirl_full.png (http://www.needanother.co.uk/uploads/Swirl_full.png) for full sized image.

Title: Re: Froth swirl
Post by: zeta forest on February 14, 2013, 08:06:27 PM

Lovely!

Title: Re: Froth swirl
Post by: simon.snake on February 14, 2013, 08:19:08 PM

Thanks.

Took far too many hours and I came back to it after leaving it overnight when it was over half way generated and pressed the wrong button, only to see it starting from 0 lines out of 8192 again! It was still generating the following morning...

The full size file has no anti-aliasing as FractInt doesn't do it as far as I can tell.

Title: Re: Froth swirl
Post by: Pauldelbrot on February 14, 2013, 08:45:12 PM

What is it, a z⁶ + c Julia set?

Title: Re: Froth swirl
Post by: simon.snake on February 14, 2013, 09:32:42 PM

Well, it is a julia set but when I load it back into FractInt now it doesn't tell me the correct formula or seed values, therefore I'm unable to tell you which formula it was, but I think it was the following formula:

Code:

simon0087-C {
  if (ismand)
    z = pixel
    c = pixel
  else
    z = pixel
    c = p1
  endif:
  z = z * z * (z/c)
  z = 1/(z * z + c)
  |z| < 4
}

No idea where the seed of the julia was, but if you look at the different types of julia that are created, there's such a wide variety it's surprising.

Please take a look and see what you find...

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Fractal Software => FractInt Gallery => Topic started by: simon.snake on February 14, 2013, 08:00:19 PM