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Saw drawing
by Ricardo Forno 01 Mar '24

01 Mar '24

Hi! I'using Fractint into a DOS Box. When I enlarge the image, oblique lines are seen as saws, due to lack of precision. My question is: how can I increase the visual definition of fractint images? Thanks for your attention.

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Problems with a 64 bit windws 11 PC
by Ricardo Forno 28 Feb '24

28 Feb '24

Hi! I'm trying yo use DOSBox Fractint last version as obtained from Tim Wegner, I can't make it run. One of the problem seems to be the 64-bit CPU. Does someone know a solution to this problem? Thanks.

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Re: So read a little bit about the history of complex dynamics
by Timothy Wegner 02 Feb '24

02 Feb '24

More from Lee Skinner (we are still working on why he can't post): Bill, I have no problem with anything that your references state: that there are no islands within the main Mandelbrot lake or in any of the surrounding midgets. But my conjecture similarly states just the opposite: That there are no islands in the surrounding space outside the Mandelbrot Set, i.e., the tendrils do not enclose any of that space. So, just viewing the Mandelbrot Set as black on a white background (no other colors), there are no islands in either the black or white regions. Lee On 1/31/2024 10:09 AM, Bill Jemison wrote: I may have misspoken - or more likely don't understand. Rather than saying the entire Mset is a single line, I probably should have said that the boundary line (or shoreline) should be a single line if MLC holds. There is no mention of multiple boundary lines or shorelines that I remember. Let's say that the fractal is the lake. My understanding of MLC is that there can be no islands in the M-lake, since that would bring into play more than one shoreline. Here is a quote from the article: *************** In the Orsay notes, Douady and Hubbard proved several major theorems that were motivated by the computer images they’d seen. *They showed that the Mandelbrot set was connected — that you can draw a line from any point in the set to any other without lifting your pencil*. Mandelbrot had initially suspected the opposite: His first images of the set looked like one big island with lots of little ones floating in a sea around it. But later, after seeing higher-resolution pictures — including ones that used color to illustrate how quickly equations outside the set flew off to infinity — Mandelbrot changed his guess.* It became clear that those little islands were all connected by very thin tendrils.* The introduction of color “is a very mundane thing, but it’s important,” said Søren Eilers of the University of Copenhagen. **************** And here is another: ***************** Density of hyperbolicity deals with the Mandelbrot set’s interior. But* MLC would also enable mathematicians to assign an address to every point on the set’s boundary.* “It gives a name to every dot. And then, once you have been able to name every dot of the boundary of the Mandelbrot set, you can hope to really understand it completely,” Hubbard said. ****************** It seems to me that naming every point on the set's boundary strongly implies that there is indeed only one boundary. If there is an island in the fractal lake (or outside it?) that would introduce another unbroken boundary. Obviously, I am struggling to understand some of the concepts and theories, but am fascinated nonetheless.

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So read a little bit about the history of complex dynamics
by David W. Jones 31 Jan '24

31 Jan '24

The Quest to Decode the Mandelbrot Set, Math’s Famed Fractal https://www.quantamagazine.org/the-quest-to-decode-the-mandelbrot-set-maths… --- David W. Jones gnome(a)hawaii.rr.com exploring the landscape of god http://dancingtreefrog.com Sent from my Android device with F/LOSS K-9 Mail.

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The "Coltrane Fractal"
by Bill Jemison 03 Sep '23

03 Sep '23

Fascinating dive into music and fractals (think John Coltrane): Sorry, but after the ad, it starts in the middle, so please slide it back to the beginning. https://www.youtube.com/watch?v=J98jwtm5U4E&t=192s

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Mandel deriv inte
by Edward Montague 23 Aug '23

23 Aug '23

Over at Fractal Forums, which I can't reach at present, there's an attempt to integrate the Mandelbrot series via the Euler method or similar. It occurs to me that one way to check the validity of this approach is to apply the integration method to the derivative of the Mandelbrot series. This is my initial attempt, feel free to make your own formulas from this. Try p2 between 0.01 and 1 For d--mand, p1 should be large For ed-mand , p1 0.1, p2 0.01 , or similar , this is examining the region where integral of the derivative is mostly the same as the iterated function. d--mand.frm ; Euler integration method, y[n+1] = y[n] + h*f(tn,y[n]) ; For Mandelbrot set, f(tn,y[n]) = y[n]^2 + c ; y[n+1]=y[n] + h*(y[n]^2 + c) e---mand {; Ed Mont, (c) 2023 z = c = pixel, u = p2*z : z = z^2 + c; u = u + p2*z |u|<p1 } ; First derivative of the Mandelbrot series . ; z[n+1]' = ( 2*z[n]'*z[n] ) + 1 d---mand {; Ed Mont, (c) 2023 z = c = pixel, u=1: u = (2*u*z) + 1 z = z^2 + c; |u|<p1 } ; First derivative of the Mandelbrot series . ; z[n+1]' = ( 2*z[n]'*z[n] ) + 1 ; Then Eulers method . ed---mand {; Ed Mont, (c) 2023 z = c = pixel, u=1, w = p2*u,v=c: z=v u = (2*u*z) + 1 w = w + p2*u v = z^2 + c |w-z| < p1 }

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Update 2022-05-03 to SDL version
by Jonathan Osuch 13 Aug '23

13 Aug '23

Folks, An updated version of SDL Fractint has been uploaded to www.fractint.net. Fixes include: Fixed palette editor font. Fixed prompt/tab screen borders when a fractal type or formula has no parameters. Enabled orbits window. Fixed sound routines so emulation of PC speaker works and turns off when sound=no is used. Fixed functionality of orbitsave=yes/no/sound so that it will now turn off when orbitsave=no is used at the command prompt screen <G>. Note that I did not get the PC speaker emulation to reproduce the screech that you get in the DOS version when the orbit delay is too short. The sound skips, instead. The click due to the square wave cutting off when the note is ended is faithfully reproduced. The Advanced Sound Control features are not implemented. Look in the directory at: https://www.fractint.net/ftp/experimental/ For: Windows version (32-bit) is: SDL2-fractint-20.05alpha-2022-05-03.zip Pre-compiled 64-bit Linux version is: SDL2-Xfractint-20.05alpha-2022-05-03.tar.xz Jonathan

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Off-topic: DOSBox
by mchris＠value.net - Webmail 22 Jul '23

22 Jul '23

Does anyone here use DOSBox on Windows 10? I visited the DOSBox site and the only version listed for Windows is 32 bit; my OS is 64 bit version 21H2. Will the 32 bit version run safely on my PC? [ https://www.dosbox.com/download.php?main=1 | https://www.dosbox.com/download.php?main=1 ] TIA, Bud AKA Mark

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New member intro
by circuitsmith＠gmail.com 21 Jul '23

21 Jul '23

I'm an Electrical Engineer, retired, focused on analog and mixed signal. I played around with Fractint in the early days. Also doing some rudimentary programming of ideas in Scientific American's "Computer Creations" articles. I was EE Lab Manager at a university and when the pandemic hit I had some free time to revisit Fractint. Even more time after I retired in April 2022, after 31 years. My Fractint skills are pretty basic, exploring the built-in formulas and devising a few MAP files. Here's a gallery of images and videos of parameter morphing and an image zoom. https://photos.app.goo.gl/zeUuxvwQaoXwkEGG7 https://www.youtube.com/watch?v=IGAZXM1EUoo https://www.youtube.com/watch?v=mEkSIFZEB3Y https://www.youtube.com/watch?v=j5UY8eF_F2w https://www.youtube.com/watch?v=LOVOv8P-gdA

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not sure who remembers me, but
by travelgirl.fics＠gmail.com 30 Jun '23

30 Jun '23

was active as one of the stone group artists back on compuserve in the good ol' days, pre-1997 Ior so). remember bert, tim, lee skinner, and a few others from that time, but it has also been over 25 years... if you were there back then, feel free to say hi... oh, and if there's a program useable today (preferably free) that will read the old PAR files and generate images in larger resolutions than 1024x768, i'd love to hear about it. system is win10 if that helps, but i might be able to scrounge up some linux hardware if i had to... thanks. caren

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