September 2019 - Fractint - mailman.xmission.com

Archives updating
by Timothy Wegner 19 Jun '21

19 Jun '21

The archive links for the fractint list are working, but the list archives appear not to be updating. I have asked support about this. While I don't think the low traffic is the problem, we might be advised to post a few more messages in case there's some threshold before newer messages get archived. Tim

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Update 2019-09-15 to SDL version
by Jonathan Osuch 27 Dec '19

27 Dec '19

Folks, Added additional assembly language complex math routines. Now the DivideBrot5 fractal type produces an image. Look in the directory: https://www.fractint.org/ftp/experimental/ For: Windows version (32-bit) is: SDL2-fractint-20.05alpha-2019-09-15.zip Pre-compiled 64-bit Linux version is: SDL2-Xfractint-20.05alpha-2019-09-15.tar.xz Jonathan

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Archives back online
by Timothy Wegner 24 Sep '19

24 Sep '19

Xmission support just wrote to me that the fractint archives are back working. That doesn't mean that there aren't missing messages in the archives, but just glancing, I see some of the recent messages are there. If someone wants to check more thoroughly, let us know the result. Recall that there were archives problems earlier in the year, so it wouldn't surprise me if the archives are incomplete. If the archives capture messages going forward, we are better off than we were. The link can be found at the bottom of every message, and clicking once more at the archives link near the top. But for convenience, the link is: https://mailman.xmission.com/lurker/list/fractint.en.html <https://mailman.xmission.com/lurker/list/fractint.en.html> Tim

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Jim Muth's DivideBrot5 formula makes nice fractals.
by Harold Lane 17 Sep '19

17 Sep '19

Jim Muth's DivideBrot5 formula makes nice fractals. Fractint says his *built-in-type* formula is: z(n+1)=sqr(z(n)) / (z(n)^(-(a-2)) + (b+10^(-20)))+pixel For these fractals I set the parameters: a=7 and b=1. Default values are: a=2 and b=0. I couldn't resist doing a few zooms while I was trying out Jonathan's new version of FractSDL: "SDL2-fractint-20.05alpha-2019-09-15". View these fractals full size to see their original pixels. Firefox displayed my images OK with my URL's HTTP://, but Chrome looks like it changes my URLs to HTTP*S*:// and my hosting provider's HTTPS certificate looks like it aged out last month -- and Chrome now gives a certificate error: NET::ERR_CERT_COMMON_NAME_INVALID After I got the above error -- to view my images in Chrome I think I recall I had to: - click Advanced, and then click Chrome's: - "Proceed to www.emarketingiseasy.com (unsafe)" Even after clearing Chrome's cache and closing and reopening Chrome, Google has remembered that I want to view images on my server and won't give me the error again -- so I'm not able to provide you with certainty the exact sequence of clicks I used to see my images using Chrome. Sorry. I use a link shortener because long links get chopped into two pieces by the email/list process -- neither of which work. DivBrt01.gif: MaxIter changed from the default 150 to 500, Color map=blues.map: http://tinyurl.com/DivBrt01 or: http://www.emarketingiseasy.com/Fractint/2019-09-15_SDL2-fractint-20.05alpha /DivBrt01.gif DivBrt02: Upper right quadrant of DivBrt01: MaxIter=1000: http://tinyurl.com/DivBrt02 Mike Frazier and I enjoy looking into what tendrils do in fractals. They often surprise us: Here are some provided by Jim's dividebrot5 formula: DivBrt03: Lower left corner of DivBrt02: MaxIter=2000, Periodicity=0: http://tinyurl.com/DivBrt03 DivBrt04: A little further zoom shows the interesting "tendril activity" better: MaxIter=2000, Periodicity=0: http://tinyurl.com/DivBrt04 DivBrt05: The upper tendril pair in DivBrt04: MaxIter=2000, Periodicity=0: http://tinyurl.com/DivBrt05 DivBrt06: The upper tendril pair on keeps curling around as you zoom in: MaxIter=2000, Periodicity=0: http://tinyurl.com/DivBrt06 DivBrt08: *Click* the image and *scroll* down to see the center of this 4096x3072 gif. When I tried anti-aliasing, it made the narrowest features dim down too much. Also, when the tendril become sub-pixel in size (but you hope for an occasional lucky hit/sample on the tendril,) I think the very dark area of the color map happens just when you want bright pixels to make them show up -- and perhaps MaxIter still isn't high enough. MaxIter=4000, Periodicity=0: http://tinyurl.com/DivBrt08 OK. Enough infinite curling. DivBrt09: The lower convergence of tendrils in DivBrt04: *Click* the image and *scroll* down to see the center. The tendrils pass through/over/under/? each other! Some tendrils in the "swarms" of tendrils coming in from the left and right peter out, likely because I didn't set MaxIter high enough. Note also that the tendril from the left -- after crossing the downward pointing one -- continues on to the right, attempting to meet its mate. Who knows where the downward-pointing tendril is going? Does it, too, have a secret rendezvous? MaxIter=4000, Periodicity=0, 4096x3072: http://tinyurl.com/DivBrt09 Thank you, Jim, Jonathan! - Hal Lane ######################## # hallane(a)earthlink.net ########################

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Stumbled on this from Twitter
by David W. Jones 14 Sep '19

14 Sep '19

-0.5669892000858323 + 0.47803181554718704i at zoom 1.8353441034e+06. jit:20190808113002 https://t.co/YTgqkqKlCc https://twitter.com/randommandelbot/status/1172261226841198592 Don't know what formula it uses. --- David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com Sent from my Android device with F/LOSS K-9 Mail.

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Twitter fractal posted link in may add Windows commands to your registry
by Harold Lane 14 Sep '19

14 Sep '19

Albrecht sent me a personal email saying: -"In the forum David published a link from -twitter. Watch out ! -It is malware - after erroneously clicking on it -I checked the registry and there were more then 200 (!!!) -entries named twitter, mostly *windows commands*." I happened to not click on the link myself, but I did a search for "twitter" in my registry anyway. I'd forgotten that I have a Twitter account that I don't use, but the number of Twitter entries in my registry was eye-opening. There are so many entries that I'm not able to tell whether I have accumulated any malevolent Twitter entries over time in addition to my account's entries. Albrecht said that he was able to use a utility named "JV tools" to remove his registry's "Twitter Windows Command" entries. I'd be interested to learn whether anyone who: - has *no* Twitter account, and - *did* click on the link David found and posted here has any "Twitter Windows Commands" in their Windows registry. - Hal Lane ######################## # hallane(a)earthlink.net ########################

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Twitter Links in this forum
by Albrecht Niekamp 13 Sep '19

13 Sep '19

Sorry, I have to protest against Twitter links in this forum. The reason is in the press. This also applies to facebook On 13.09.2019 03:17, David W. Jones wrote: -0.5669892000858323 + 0.47803181554718704i at zoom 1.8353441034e+06. jit:20190808113002 h _______________________________________________ Fractint mailing list Fractint(a)mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/fractint

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Multifractal Archives Audio section
by Albrecht Niekamp 12 Sep '19

12 Sep '19

please check it out too. A special tip : Slipping & Sliding_101017PQ You will like the driving fractal rhythm simulating a fast ride, as the title suggests. pCloud has an own player with a good gui and sound and even shows the converted fractal image and the IFS image used for scanning. Albrecht ; https://my.pcloud.com/publink/show?code=kZPUCq7Z2R5HjipmhlhitVKhz1hCJFUeugfy ;

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Brass Culture
by Albrecht Niekamp 12 Sep '19

12 Sep '19

After some editing the archives are available again. ; https://my.pcloud.com/publink/show?code=kZPUCq7Z2R5HjipmhlhitVKhz1hCJFUeugfy ; The new folder "Brass Culture" contains more then 30 images all done with the same formula and colors. Check them out and select your favorite, if you want. Albrecht

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New Images
by Albrecht Niekamp 10 Sep '19

10 Sep '19

Check them out if you´re still interested. ; https://my.pcloud.com/publink/show?code=kZPUCq7Z2R5HjipmhlhitVKhz1hCJFUeugfy ; Albrecht

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