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Extracted Mini-BrotsExtract-a-MandelMandelScale
Extract-a-Mandel
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Description: Here is a the main set using the following formula:
______________
unsigned int retry = 0;

for (unsigned int i = 1; i < 256; ++i)
{
    z = z*z + c;

    // escape condition
    if (z.real() * z.real() + z.imag() * z.imag() > 4.0)
    {
        if (retry < 6)
        {
            z = z * (1 / 3.0);
            --i;
            ++retry;
            continue;
        }


        // escaped!
        return; // bail!
    }
}
______________

This one has mini-brots where there should be nothing. They are being extracted out of the set. Can you see them in there? Will go for a little zoom...

https://plus.google.com/101799841244447089430/posts/1gdLzBYC3KD

Stats:
Total Favorities: 0 View Who Favorited
Filesize: 3.24MB
Height: 2160 Width: 3840
Keywords: fractal math space iteration scale Mandelbrot Julia geometry complex art 
Posted by: Chris Thomasson September 12, 2017, 06:20:20 AM

Rating: Has not been rated yet.

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By: Chris Thomasson
  Slideshow  

Comments (2) rss
Chris Thomasson
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Posts: 137



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September 25, 2017, 01:05:06 AM
Quote from: 3dickulus
very interesting result  A Beer Cup

I modified it a bit for use with Fragmentarium...

Added some uniforms...
Code:

uniform int  RetryMax; slider[0,0,64]
uniform double RetryEntry; slider[0,0,64]
uniform double RetryBias; slider[0,0,64]


Then in the color() function I added this immediately after plotting z in the iteration loop ...
Code:

    if (z.x * z.x + z.y * z.y > RetryEntry)
    {
        if (retry < RetryMax)
        {
            z = z * (1./RetryBias);
            --i;
            ++retry;
            continue;
        }
    }


It works very well with BurningShip cheesy will post something on the new FF soon.


Thank you for giving it a go!  A Beer Cup A Beer Cup A Beer Cup

Have not yet tried it out in a shader: Need to get on that.  shocked

Anyway, I am glad its working out for you so far. Fwiw, check this out:

http://www.fractalforums.com/index.php?action=gallery;sa=view;id=20582

https://plus.google.com/101799841244447089430/posts/cnBW9jmwET9

There are mini-brots all over this damn thing!  alien
3dickulus
Fractal Senior
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Posts: 1558



View Profile WWW
September 18, 2017, 02:11:18 AM
very interesting result  A Beer Cup

I modified it a bit for use with Fragmentarium...

Added some uniforms...
Code:

uniform int  RetryMax; slider[0,0,64]
uniform double RetryEntry; slider[0,0,64]
uniform double RetryBias; slider[0,0,64]


Then in the color() function I added this immediately after plotting z in the iteration loop ...
Code:

    if (z.x * z.x + z.y * z.y > RetryEntry)
    {
        if (retry < RetryMax)
        {
            z = z * (1./RetryBias);
            --i;
            ++retry;
            continue;
        }
    }


It works very well with BurningShip cheesy will post something on the new FF soon.

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