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Welcome to Fractal Forums > Fractal Math, Chaos Theory & Research > Mandelbrot & Julia Set > strange deep zoom glitch (help!)
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Author Topic: strange deep zoom glitch (help!)  (Read 496 times)
Description: ugly and don't know how to fix :(
0 Members and 1 Guest are viewing this topic.
claude
Fractal Bachius
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« on: March 20, 2016, 07:11:14 PM »


Should be a regular-looking minibrot with rings like the bottom right corner all around, but instead it's all spangly and glitchy, not to mention the wrong shape.

Anyone have any ideas why this might occur and how to fix it?  Or even seen anything like it in another location?

This is rendered with series approximation (2048 coeffecients of extended-exponent double) and distance estimation, it's dark because the filaments are very dense.

I've half a mind to fake the ending of the 2x zoom sequence with an appropriately scaled and rotated view of the top-level continent, as only the last 7 frames (including this one) are affected...
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quaz0r
Fractal Molossus
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Posts: 652
« Reply #1 on: March 20, 2016, 07:31:23 PM »
2048 coefficients   shocked

when you guys try to debug locations like this, do you test manually limiting how far the series approximation goes, to see when it does in fact render properly?  maybe you can perform some kind of analyses and figure out a more proper criterion for when to bail on the series approximation    cheesy
« Last Edit: March 20, 2016, 07:42:28 PM by quaz0r » Logged
Chillheimer
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Just another fractal being floating by..


chilli.chillheimer chillheimer
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« Reply #2 on: March 20, 2016, 09:46:11 PM »
...and if you zoom deep enough, just before reaching infinity.. you will find..
Pacman!

(sorry, I have nothing helpful to contribute..)
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--- Fractals - add some Chaos to your life and put the world in order. ---
quaz0r
Fractal Molossus
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Posts: 652
« Reply #3 on: March 20, 2016, 10:25:44 PM »
Code:
                  ______
           _____/      \\_____
          |   _     ___   _   ||
          |  | \     |   | \  ||
          |  |  |    |   |  | ||
          |  |_/     |   |_/  ||
          |  | \     |   |    ||
          |  |  \    |   |    ||
          |  |   \. _|_. | .  ||
          |                   ||
          |     Here lies     ||
          |    Chillheimer    ||
          |                   ||
          |   He contributed  ||
          |        The        ||
          | PacMan Conjecture ||
          |    to humanity    ||
          |                   ||
          |                   ||
  *       |  *   **    * **   |**      **
   \)).....//.,(//,,..,,\||(,,.,\\,.((//
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Adam Majewski
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« Reply #4 on: March 21, 2016, 06:21:24 PM »
what are results from other programs ?
Can you post parameters ?
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claude
Fractal Bachius
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« Reply #5 on: March 21, 2016, 06:41:42 PM »
Quote from: Adam Majewski on March 21, 2016, 06:21:24 PM
what are results from other programs ?
Can you post parameters ?

I haven't tried any other programs, but I believe it is too deep for MandelMachine, which leaves Kalles Fraktaler as the only(?) published program that can do it, and that doesn't do distance estimation (as of now) so it's not useful to me.at this time.

Location is Kalles' e10000 location: http://www.chillheimer.de/kallesfraktaler/e10000.kfr with radius between 1e-10000 (glitch first appears) and 1e-10002 (image in my first post).
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PieMan597
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« Reply #6 on: March 21, 2016, 06:47:58 PM »
You could maybe try putting the initial reference in the minibrot?
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claude
Fractal Bachius
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« Reply #7 on: March 21, 2016, 07:00:15 PM »
It should be already, but maybe there's a bug (with insufficient precision perhaps?) - thanks for the idea of something to look into..
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quaz0r
Fractal Molossus
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« Reply #8 on: March 21, 2016, 07:53:17 PM »
picking better reference points is of course a good thing, but shouldnt we be the most concerned that incorrect results can be produced?  i think this should be the focus   huh?
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PieMan597
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« Reply #9 on: March 22, 2016, 12:07:47 AM »
I'll try loading the coordinates into Mighty Mandel, and see what I get.
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claude
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« Reply #10 on: March 27, 2016, 12:14:31 AM »
I think it's fixed (still some frames to render but looking promising, I can see a babybrot a few pixels, wide enough to tell it isn't pacman).  thanks PieMan597 for pointing me to the problem.  quaz0r, don't worry - this was a case of user error aka garbage in garbage out... (I had the manual precision signifier set too low, so the primary reference wasn't as good as it should have been).. my code doesn't yet check for every stupidity...
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quaz0r
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« Reply #11 on: March 27, 2016, 01:05:25 AM »
good news  smiley
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