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Author Topic: Mandel Machine  (Read 36296 times)
Description: A highly efficient Mandelbrot set explorer
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ellarien
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« Reply #15 on: February 11, 2014, 07:09:49 PM »

Thanks! I thought it might be a case of waiting for the glitch fixes, so I'll try to be patient. I've attached the .mmf file (with a .txt extension added) for a location that's been giving me trouble. The minibrot a few zooms further down works fine. Turning off perturbation mode does seem to make it work, if slowly.


* feb11_05b.mmf.txt (0.6 KB - downloaded 128 times.)
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youhn
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« Reply #16 on: February 11, 2014, 08:34:41 PM »

When I try your location, I see what you mean if pertubation theory is turned on. My understanding of this theory and the way it is coded is not very deep. But I understand it uses a single point to predicts the shapes around it ... or something like that. So it might be good to know which point is picked in what way. Probably something to do with the way you zoom and where you click. For example; when you click on a blue area to zoom in ... the next view could be totaly blue. Turn off pertubation for a deeper calculation, then turn it back off to navigate faster.

Another tip is to decrease the color density or pick log color method. Maybe just a personal preference, but it allows you to see the mandelbrot set border more clearly.
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ellarien
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« Reply #17 on: February 11, 2014, 08:46:50 PM »

Yes, it does seem to be very sensitive to the exact location -- and once the detail is lost it's hard to see where the pointer needs to be!  Thanks for drawing my attention to the different colouring modes -- I hadn't noticed that, and it does make it easier to see what's what.
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Dinkydau
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« Reply #18 on: February 11, 2014, 10:45:16 PM »

Very interesting program! I'm looking forward to the future versions. Is this a collaboration between Michael Condron, Bruce Dawson, Kevin Martin and Karl Runmo? The program feels to be based on ultra fractal, is that true?
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ellarien
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« Reply #19 on: February 11, 2014, 11:19:16 PM »

I've been playing a bit more and discovered that I like the histogram colouring mode ... and I think I may have found a bug. When in histogram mode, changing the interation limit causes the program to go into what looks suspiciously like an infinite loop, with the elapsed time increasing but nothing else happening, and I then have to kill the program. (At least it responds to the close-window button and isn't using a lot of resources while stuck.) If I switch to another mode, make the iteration change and switch back, all is fine.
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Botond Kósa
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« Reply #20 on: February 11, 2014, 11:27:17 PM »

Is this a collaboration between Michael Condron, Bruce Dawson, Kevin Martin and Karl Runmo? The program feels to be based on ultra fractal, is that true?

That kind of collaboration would be very nice, but this is not the case. As I put together my own implementation I simply used the know-how they made publicly available on their web sites (Michael Condron's bignum article, Bruce Dawson's 64bit ASM implementation details, Kevin Martin's paper on Superfractalthing maths and Karl Runmo's posts about his findings related to perturbation & series approximation).

The Ultra Fractal-like appearance is intentional, but the two programs are completely unrelated. I found their GUI to be quite ergonomic, so I borrowed some ideas. Their default color palette is also very beautiful.
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Check out my Mandelbrot set explorer:
http://web.t-online.hu/kbotond/mandelmachine/
Botond Kósa
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« Reply #21 on: February 12, 2014, 12:39:33 AM »

Mandel Machine v1.0.1 is available (http://web.t-online.hu/kbotond/mandelmachine/). Changes:
  • FIXED: Application hangs when increasing iteration limit with histogram coloring
  • FIXED: Application hangs when using perturbation method after a benchmark run
  • IMPROVED: Reduced memory usage when using perturbation method and high iteration limit (millions)
« Last Edit: February 12, 2014, 12:41:28 AM by Botond Kósa » Logged

Check out my Mandelbrot set explorer:
http://web.t-online.hu/kbotond/mandelmachine/
Dinkydau
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« Reply #22 on: February 12, 2014, 02:01:03 AM »

Recently I loaded the my location Tick Tock from Kalles' collection of locations on my computer with 32 cores. The result was the following:
Tick tock renders in 1,5 seconds.

I now made it a serious benchmark with nothing else running and I took the average of a few runs. This makes it 1,269 seconds.

Now, with mandel machine, using 8 threads: 0,226 seconds!!!

The intuitive interface makes it easy to do very large renders with the most amazing speed, and the gradient options look very promising.
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panzerboy
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« Reply #23 on: February 12, 2014, 03:11:10 AM »

Real nice being able to map and offset my Kalles Fraktaler Palettes.


http://www.flickr.com/photos/panzerboy/12470052975/
Shame about the center lacking detail, I guess glitch correction will be forthcoming.
« Last Edit: February 12, 2014, 03:33:58 AM by panzerboy » Logged
Kalles Fraktaler
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« Reply #24 on: February 12, 2014, 10:27:15 AM »

Repeating Zooming Self-Silimilar Thumb Up, by Craig
I doubt that it is only because of the use of assembler that made your Mandel Machine more than 6 times faster than mine Kalles Fraktaler.
Are you able to skip more pixels with Series Approximation? Or did you find other ways to optimize the render?

Yeah, glitch solving... I guess that's where I spent more than 90% of the time of my program.
Because even if you find the pixel with the highest iteration to use as reference, deeper locations cannot be rendered with one reference only...
I hope you can succeed with that too better than me smiley
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Want to create DEEP Mandelbrot fractals 100 times faster than the commercial programs, for FREE? One hour or one minute? Three months or one day? Try Kalles Fraktaler http://www.chillheimer.de/kallesfraktaler
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Chillheimer
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« Reply #25 on: February 12, 2014, 12:37:51 PM »

Hello!

Very nice program!
I love the many options and the nice user interface.

Especially the colour-extraction from other images is incredibly useful!

Very good work!

Now I just have to wait for the movie maker smiley Looking forward to that..


I have to mention that the program freezes quit a lot.
I'll try to find out if these freezes happen at specific actions and will post it here.
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--- Fractals - add some Chaos to your life and put the world in order. ---
ellarien
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« Reply #26 on: February 12, 2014, 01:06:51 PM »

Mandel Machine v1.0.1 is available (http://web.t-online.hu/kbotond/mandelmachine/). Changes:
  • FIXED: Application hangs when increasing iteration limit with histogram coloring

That was fast! Thanks.

Unfortunately, with the new version I'm getting  a different kind of hang quite frequently. Usually it happens when panning, but occasionally when zooming; the rendering freezes showing the status message "Initializing series approximation." In this condition it is still possible to save the definition file and carry on after restarting the program and loading the saved parameters.

I tried turning off series approximation, and then it hung with "Computing ..." and the progress bar about half an inch along. I haven't yet managed to trigger this with perturbation theory turned off.

(And just to prove that I'm enjoying the program as well as finding problems, here's a pretty picture: http://www.flickr.com/photos/ellarien/12477720693/)
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Botond Kósa
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« Reply #27 on: February 12, 2014, 01:47:36 PM »

Unfortunately, with the new version I'm getting  a different kind of hang quite frequently. Usually it happens when panning, but occasionally when zooming; the rendering freezes showing the status message "Initializing series approximation." In this condition it is still possible to save the definition file and carry on after restarting the program and loading the saved parameters.

Can you post the parameter file you saved after the program froze?
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Check out my Mandelbrot set explorer:
http://web.t-online.hu/kbotond/mandelmachine/
ellarien
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« Reply #28 on: February 12, 2014, 01:50:22 PM »

Can you post the parameter file you saved after the program froze?

Sure.

* temp.mmf.txt (0.64 KB - downloaded 127 times.)
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Dinkydau
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« Reply #29 on: February 12, 2014, 05:23:05 PM »

My computer rendered this at night with mandel machine. It's 9216×5760 with 2×2 anti-aliasing and it took 7 hours.

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