July 2020 - Fractdev - mailman.xmission.com

Building xfractint fails with -fno-common or gcc 10
by David Denoncin 12 Jul '20

12 Jul '20

Dear xfractint developers, I'm a gentoo linux user and it has been noticed that xfractint does not compile with -fno-common or gcc-10 (https://bugs.gentoo.org/706522) I'm not a C programmer, but I've managed to get the software to compile by applying the three attached patches. Please let me know if you intend to modify your source code so that I know what to do with the corresponding gentoo package. Best regards, David Denoncin.

4 9

Upgrades for Fractint
by Paul 09 Jul '20

09 Jul '20

Dear Friends of Fractint, I have been thinking a lot about possible upgrades to Fractint. It is a remarkable piece of software. However, there are many issues as I try to port much of the code to my program ManpWIN. The main issue is the use of global variables for everything. I recognise the need for them in the purely DOS days to get every bit of speed possible. I want to upgrade the code to allow multi-threading. In order to do this there can't be any global variables as one thread will overwrite the value of another. C++ helps by allowing variables to be global for each object but not for others. So an object can be used for each thread. Other possible improvements. 1. I have replaced the bignum library with MPFR because it is thread safe and is quicker than Fractint's bignum library. 2. I have created a complex number bignum library that simplifies many of the complex number routines 3. I have ported all the plotting routines to C++ and added a couple of my own 4. Incorporate perturbation theory for faster bignum calculations at high zoom levels. This works very well and is mult-threaded 5. Offer slope clculations to show a 3D effect. This is also multi-threaded However, I am still stuck on the main Fractint portions of my code because of all the remaining global variables. I would dearly love to make it multi-threading, especially when we zoom deep into arbitrary precision. Is anyone interested in looking at these issues? I am happy to share some of my source code if anyone wants it. Thanks, Paul. ---------------------------------------------------------- Paul de Leeuw Computers NSW Central Coast, Australia Email: pdeleeuw(a)deleeuw.com.au www: <https://www.deleeuw.com.au> ABN 72 360 822 562 ----------------------------------------------------------

3 4

Oops, Warning messages
by Paul 09 Jul '20

09 Jul '20

Oops, sorry friends, I think I vilolated some protocol by adding an image signature to my emails. Sorry if my messages didn't get to you or if I caused any other issues. Regards, Paul. ---------------------------------------------------------- Paul de Leeuw Computers NSW Central Coast, Australia Email: pdeleeuw(a)deleeuw.com.au www: <https://www.deleeuw.com.au> ABN 72 360 822 562 ----------------------------------------------------------

1 0

Re: [Fractdev] STOP
by Harold Lane 08 Jul '20

08 Jul '20

Your message is so cryptic, it fails to communicate what you wish stopped -- and the reasoning behind stopping it. Fyi, my email was a follow-up email with information identifying some errors remaining in Richard's Fractint code base -- and some workarounds. I further characterized Richard's code base as being successful enough to calculate thousands of images using Jim Muth's FOTD PARS and FRMs. - Hal Lane ######################## # hallane(a)earthlink.net ######################## -----Original Message----- From: Fractdev <fractdev-bounces(a)mailman.xmission.com> On Behalf Of Mr Timothy Butler Sent: Tuesday, July 7, 2020 7:29 PM To: Fractint developer's list <fractdev(a)mailman.xmission.com> Subject: Re: [Fractdev] Examples of issues & work-arounds discovered in Richard's Iterated Dynamics / Fractint for Windows beta 5 STOP -----Original Message----- From: Fractdev <fractdev-bounces+timothy.butler=uqconnect.edu.au(a)mailman.xmission.com> On Behalf Of Harold Lane Sent: Wednesday, 8 July 2020 7:17 AM To: 'Fractint developer's list' <fractdev(a)mailman.xmission.com> Subject: [Fractdev] Examples of issues & work-arounds discovered in Richard's Iterated Dynamics / Fractint for Windows beta 5 Paul, Tim, As examples of issues that I've discovered which remain in Richard's Iterated Dynamics / Fractint for Windows beta 5 -- some of which I was able to come up with work-arounds for -- see my email to Jim Muth below: I renamed my work-around for the "frm:MandelbrotBC3" problem: "frm:MandelbrotBC9". Any PAR file using my work-around will also need to refer to "frm:MandelbrotBC9". I created and posted thousands of images with Richard's program on my site and posted them to the Fractint list. See the URL to my site below. It's not an HTTPS server. The unfortunate domain name is left over from long, long ago. - Hal Lane ######################## # hallane(a)earthlink.net ######################## -----Original Message----- From: Harold Lane <hallane(a)earthlink.net> Sent: Thursday, February 25, 2016 3:45 PM To: 'Fractint and General Fractals Discussion' <fractint(a)mailman.xmission.com>; Muth, Jim (jimmuth(a)earthlink.net) <jimmuth(a)earthlink.net>; Richard_Fractint4win (legalize(a)xmission.com) <legalize(a)xmission.com> Subject: RE: [Fractint] I'm working on resuming the FOT???? Jim, Be aware that rotating the zoom box of Richard's Fractint for Windows beta 5 (now renamed Iterated Dynamics -- and still not released for general use) distorts the zoom box contents by a factor of 4:3 and a function of the angle rotated. The zoom box can, however, easily be rotated 90 degrees and show a correct aspect ratio image -- if you follow the 90 degree rotation with manually shrinking the X direction by a factor of 0.75. Note that Richard adjusted the initial default M-set to show its correct aspect ratio. To see the aspect ratio problem caused by rotation: - let the program calculate the default M-set; - zoom in to get a zoom box ~80% of the full window size; - rotate that zoombox ~45 degrees, and - hit Enter to see the non-1:1 aspect ratio result -- the circular M-set bud is no longer circular. I also recall someone saying that they had trouble with the (V)iew command. In place of View, I simply use a different pixel size window/resolution. There's also a bug that is brought to life when using the formula: formulaname=MandelbrotBC3 (also perhaps in other cases) but I discovered what triggers it and created a work-around that works -- if the function "ident" is passed to the formula... I put my work-around, (and a slight speedup) & the assumptions it makes below. I haven't used all that great a variety of Fractint's capabilities in Richard's version, so I suspect that there are a few further anomalies hidden in it -- it is a "beta" release, after all. However, despite all of the above, essentially all of my thousands of images that are variations on your FoTD images -- posted on my web site: http://www.emarketingiseasy.com/TESTS/FOTD/jim_muths_fotd.html were calculated by Richard's version of Fractint. I took great pains to verify that of Richard's Fractint for Windows beta 5 images exactly matched yours before I proceeded with creating my variations. ================================= Hal Lane's MandelbrotBC3 work around: ================================= frm:MandelbrotBC9 { ; by several Fractint users ; ; fn1() removed. This code assumes that the PAR file uses: ; ; function=ident ; ; 2*PI and flip(p) speedups added ; ; -Hal Lane ; twopi=2*PI flip2pi=flip(twopi) e=p1 a=imag(p2)+100 p=real(p2)+PI flipp=flip(p) r=real(p2)+PI-p Z=C=Pixel: Z=log(Z) IF(imag(Z)>r) Z=Z+flip2pi ENDIF Z=exp(e*(Z+flipp))+C |Z|<a } ========================= - Hal Lane ######################## # hallane(a)earthlink.net ######################## -----Original Message----- From: Fractint [mailto:fractint-bounces@mailman.xmission.com] On Behalf Of Richard Sent: Thursday, February 25, 2016 1:31 PM To: FractInt Discussion <fractint(a)mailman.xmission.com> Subject: Re: [Fractint] I'm working on resuming the FOT???? In article <14665852.1456422756401.JavaMail.root(a)mswamui-backed.atl.sa.earthlink.net>, Jim Muth <jimmuth(a)earthlink.net> writes: > version of Fractint. Is there a version of Fractint that will run > under XP and operate similar to the DOS version? <https://github.com/LegalizeAdulthood/iterated-dynamics/releases/tag/fractin t-21-00-beta-5> -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://ComputerGraphicsMuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://LegalizeAdulthood.wordpress.com> _______________________________________________ Fractint mailing list Fractint(a)mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/fractint _______________________________________________ Fractdev mailing list Fractdev(a)mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/fractdev _______________________________________________ Fractdev mailing list Fractdev(a)mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/fractdev

1 0

Examples of issues & work-arounds discovered in Richard's Iterated Dynamics / Fractint for Windows beta 5
by Harold Lane 07 Jul '20

07 Jul '20

Paul, Tim, As examples of issues that I've discovered which remain in Richard's Iterated Dynamics / Fractint for Windows beta 5 -- some of which I was able to come up with work-arounds for -- see my email to Jim Muth below: I renamed my work-around for the "frm:MandelbrotBC3" problem: "frm:MandelbrotBC9". Any PAR file using my work-around will also need to refer to "frm:MandelbrotBC9". I created and posted thousands of images with Richard's program on my site and posted them to the Fractint list. See the URL to my site below. It's not an HTTPS server. The unfortunate domain name is left over from long, long ago. - Hal Lane ######################## # hallane(a)earthlink.net ######################## -----Original Message----- From: Harold Lane <hallane(a)earthlink.net> Sent: Thursday, February 25, 2016 3:45 PM To: 'Fractint and General Fractals Discussion' <fractint(a)mailman.xmission.com>; Muth, Jim (jimmuth(a)earthlink.net) <jimmuth(a)earthlink.net>; Richard_Fractint4win (legalize(a)xmission.com) <legalize(a)xmission.com> Subject: RE: [Fractint] I'm working on resuming the FOT???? Jim, Be aware that rotating the zoom box of Richard's Fractint for Windows beta 5 (now renamed Iterated Dynamics -- and still not released for general use) distorts the zoom box contents by a factor of 4:3 and a function of the angle rotated. The zoom box can, however, easily be rotated 90 degrees and show a correct aspect ratio image -- if you follow the 90 degree rotation with manually shrinking the X direction by a factor of 0.75. Note that Richard adjusted the initial default M-set to show its correct aspect ratio. To see the aspect ratio problem caused by rotation: - let the program calculate the default M-set; - zoom in to get a zoom box ~80% of the full window size; - rotate that zoombox ~45 degrees, and - hit Enter to see the non-1:1 aspect ratio result -- the circular M-set bud is no longer circular. I also recall someone saying that they had trouble with the (V)iew command. In place of View, I simply use a different pixel size window/resolution. There's also a bug that is brought to life when using the formula: formulaname=MandelbrotBC3 (also perhaps in other cases) but I discovered what triggers it and created a work-around that works -- if the function "ident" is passed to the formula... I put my work-around, (and a slight speedup) & the assumptions it makes below. I haven't used all that great a variety of Fractint's capabilities in Richard's version, so I suspect that there are a few further anomalies hidden in it -- it is a "beta" release, after all. However, despite all of the above, essentially all of my thousands of images that are variations on your FoTD images -- posted on my web site: http://www.emarketingiseasy.com/TESTS/FOTD/jim_muths_fotd.html were calculated by Richard's version of Fractint. I took great pains to verify that of Richard's Fractint for Windows beta 5 images exactly matched yours before I proceeded with creating my variations. ================================= Hal Lane's MandelbrotBC3 work around: ================================= frm:MandelbrotBC9 { ; by several Fractint users ; ; fn1() removed. This code assumes that the PAR file uses: ; ; function=ident ; ; 2*PI and flip(p) speedups added ; ; -Hal Lane ; twopi=2*PI flip2pi=flip(twopi) e=p1 a=imag(p2)+100 p=real(p2)+PI flipp=flip(p) r=real(p2)+PI-p Z=C=Pixel: Z=log(Z) IF(imag(Z)>r) Z=Z+flip2pi ENDIF Z=exp(e*(Z+flipp))+C |Z|<a } ========================= - Hal Lane ######################## # hallane(a)earthlink.net ######################## -----Original Message----- From: Fractint [mailto:fractint-bounces@mailman.xmission.com] On Behalf Of Richard Sent: Thursday, February 25, 2016 1:31 PM To: FractInt Discussion <fractint(a)mailman.xmission.com> Subject: Re: [Fractint] I'm working on resuming the FOT???? In article <14665852.1456422756401.JavaMail.root(a)mswamui-backed.atl.sa.earthlink.net>, Jim Muth <jimmuth(a)earthlink.net> writes: > version of Fractint. Is there a version of Fractint that will run > under XP and operate similar to the DOS version? <https://github.com/LegalizeAdulthood/iterated-dynamics/releases/tag/fractin t-21-00-beta-5> -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://ComputerGraphicsMuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://LegalizeAdulthood.wordpress.com> _______________________________________________ Fractint mailing list Fractint(a)mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/fractint

2 1