New subject: Examples of issues & work-arounds discovered in Richard's Iterated Dynamics / Fractint for Windows beta 5

7 Jul 2020

      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@earthlink.net
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-----Original Message-----
From: Harold Lane <hallane@earthlink.net> 
Sent: Thursday, February 25, 2016 3:45 PM
To: 'Fractint and General Fractals Discussion'
<fractint@mailman.xmission.com>; Muth, Jim (jimmuth@earthlink.net)
<jimmuth@earthlink.net>; Richard_Fractint4win (legalize@xmission.com)
<legalize@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

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# hallane@earthlink.net
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-----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@mailman.xmission.com>
Subject: Re: [Fractint] I'm working on resuming the FOT????

In article
<14665852.1456422756401.JavaMail.root@mswamui-backed.atl.sa.earthlink.net>,
    Jim Muth <jimmuth@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>

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Examples of issues & work-arounds discovered in Richard's Iterated Dynamics / Fractint for Windows beta 5

Harold Lane

Mr Timothy Butler

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