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Internet Message Format | 1997-08-27 | 42KB

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fractint Digest       Thursday, August 28 1997       Volume 01 : Number 009



In this issue:

    Re: (fractint) Introducing myself
    Re: (fractint) Introducing myself
    (fractint) bug
    Re: (fractint) New Coloring Methods
    Re: (fractint) Introducing myself
    (fractint) Searching for Formulas
    Re: (fractint) New Coloring Methods
    Re: (fractint) Matrox Millenium cards
    (fractint) Truecolor Development
    Re: (fractint) Matrox Millenium cards
    Re: (fractint) Matrox Millenium cards
    Attaching frm to the posted par, was (fractint) Introducing myself
    Re: (fractint) bug
    Re: (fractint) New Coloring Methods
    (fractint) deep zoom: no F6 corners?
    Re: (fractint) Matrox Millenium cards
    (fractint) Re: deep zoom: no F6 corners?
    Re: (fractint) Matrox Millenium cards
    Re: (fractint) Matrox Millenium cards
    Re: (fractint) Re: deep zoom: no F6 corners?
    Re: (fractint) deep zoom: no F6 corners?
    Re: (fractint) bug
    Re: (fractint) Searching for Formulas
    Re: (fractint) Matrox Millenium cards
    (fractint) Someday I'll grow up and have my own CD-ROM!
    Re: (fractint) Searching for Formulas
    (fractint) electricity
    Re: (fractint) New Coloring Methods
    Re: (fractint) Searching for Formulas

See the end of the digest for information on subscribing to the fractint
or fractint-digest mailing lists and on how to retrieve back issues.

----------------------------------------------------------------------

Date: 26 Aug 97 23:34:52 EDT
From: George Martin <[e-mail]>
Subject: Re: (fractint) Introducing myself

Tim,

>
I would like suggestions for a better behavior by fractint in
searching for formulas.
<

One thing that would be pretty easy is to do is to assure that fractint searches
only the basic orgform files (e.g. _b.frm), and not the duplicates (e.g.
_b_dup.frm). This would give the user some confidence about which formula is
being used if there are duplicate named formulas. If the user wants to use a
formula in a duplicate file, he can either specify the duplicate file in the par
entry or use the "g" option in interactive mode to select, for example,
"formulafile=_b_dup.frm".

George Martin


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------------------------------

Date: Tue, 26 Aug 1997 21:39:33 -0600 (MDT)
From: "Sean (and/or) Jaqueline" <[e-mail]>
Subject: Re: (fractint) Introducing myself

On Tue, 26 Aug 1997, Tim Wegner wrote:

> ... if multiple formulas with a given name exist, you're not sure which
> is being used.
>
> Maybe Fractint should have a "thorough" option where it seaches ALL
> frm files even if it finds a formula, and presents the user with a
> choice of which one to use, or at least give a warning, instead of
> quietly quitting when a formula is found. This would slow
> performance of course.
>
> Tim

Noooo!
There are so many different ways to distribute PARs, including having them
embedded in the gif89a file, that I can think of no reasonable way to make
*certain that the correct formula is being referred to.  But I wouldn't
object to seeing all the PARs on this list accompanied with their
corresponding formula.  Does anyone else feel this way?
I feel, however, that slowing Fractint down because some folks don't give
their formulas unique names is probably a bad idea.  I'd rather hand-check
for duplicate names if the PAR doesn't work, or ask the person who posted
it to post the formula if people have problems.

Hmm.. A random idea.  I have no idea if it's a good one or even possible.
Perhaps Fractint could be bundled with a small utility that checks your
FRM files for duplicate names, a'la Orgform, and write a file containing
this info.  Fractint could then check this SINGLE file before running a
PAR, and pop up a warning if formulas with the same name exist.  Would
that slow things down so much?
This utility would only need to be run when new formulas are added, and it
could be done manually by the user.
Or perhaps a CHECKSUM could be run on the default FRM directory when
Fractint is started, and the results written to a file.  If the CHECKSUM
changes, Fractint pops a message up telling you you may need to run the
aforementiond utility.  (I'd ask for a command-line option to override
this behavior, of course...)

One more thought... I sure hope someone named Roberta Carr doesn't start
formula writing, or we'll all be screwed!


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------------------------------

Date: Wed, 27 Aug 1997 14:01:41 +1000 (EST)
From: "[e-mail]" <[e-mail]>
Subject: (fractint) bug

I have discovered a bug in fractint?
When trying to draw juliabrots on my PC the scrren goes blank and then after 10
minutes trying to find out the progression of drwaing the computer hangs up.

Please Help Me?






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------------------------------

Date: Tue, 26 Aug 1997 23:52:52 -0400
From: "Damien M. Jones" <[e-mail]>
Subject: Re: (fractint) New Coloring Methods

Tim,

 - I am more than happy to add more parameters to ITERATES.TGA, such as
 - the x and y orbit values. I also promised to check into iterates.tga
 - and make sure it is working OK, but I haven't done this yet.

ITERATES.TGA works just fine here.  I have tested the Targa files produced
with several different readers, and they are all legitimate files.  A few
non-standard readers might assume the header length is always eighteen
bytes, rather than checking the header itself, but this is not a problem
with FractInt.

Adding extra parameters to ITERATES.TGA would be somewhat helpful, but most
of the really cool coloring algorithms (in my opinion) require access to
the entire set of orbits.  This cannot reasonably be stored for every
point--one image I computed recently had a *minimum* iteration count of
over 200,000.  At twenty bytes per iteration (two 10-byte long doubles)
this is four megabytes, and that's just one point.  Now figure I was
generating it at 1600x1200...

 - We are about to start a truecolor development effort, and I'll be
 - looking for people who want to participate.

Hmmm, well, I have my own opinions of what should be done in a fractal
program.  Somehow I doubt they'd mesh too well with the current state of
the FractInt code. :)

Damien M. Jones  /  temporary sanity designs  /  http://www.emi.net/~dmj/
   [e-mail]  /  my gallery: http://www.geocities.com/SoHo/Lofts/2605/


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------------------------------

Date: Wed, 27 Aug 1997 11:09:54 +0000
From: Peter Otterstaetter <[e-mail]>
Subject: Re: (fractint) Introducing myself

Hi all,
thanks to Sylvie for posting the Gallet-8-04 formula.
The formula is part of the latest orgform distribution - I found it
in _G.FRM) - so I saw no need to post the formula too. Sorry.

Peter

> Jay Hill wrote:
>
> >> Peter Otterstaetter posted this par without the formula.
> >>
> >> What if the frm:  ?
>
>   The formula is not in Fractint.frm.  Here it is:
>
> Gallet-8-04 { ; Sylvie Gallet, [e-mail], Mar 1997
>               ; Requires periodicity = 0
>               ; p1 = exponent
>               ; p2 > 1
>    z = zn = pixel , ex = p1 - 1
>    IF (p2 || imag(p2))
>       k = p2
>    ELSE
>       k = 1
>    ENDIF
>    :
>    znex = zn^ex , num = znex*zn - 1 , mnum = |num|
>    den = p1*znex , zn = zn - num/den
>    IF ( mnum > |z^p1-1|)
>       z = zn * k
>    ENDIF
>    mnum >= 0.001
>    }
>
>         -  Sylvie Gallet
>
- ----------------------------------------------------------------------
Peter Otterstaetter
BASF Aktiengesellschaft
Zentralbereich Informatik
ZXA/U Anwendungsentwicklung
D-67056 Ludwigshafen
E-mail: [e-mail]
- ----------------------------------------------------------------------
All things come to those who wait. They come, but often come too late.
    From Lady Mary M. Curie: Tout Vient a Qui Sait Attendre (1890)
- ----------------------------------------------------------------------

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------------------------------

Date: Wed, 27 Aug 1997 07:33:06 -0400 (EDT)
From: [e-mail] (Michael Traynor)
Subject: (fractint) Searching for Formulas

"Sean  Jaqueline" wrote:
>
>On Tue, 26 Aug 1997, Tim Wegner wrote:
>
>> ... if multiple formulas with a given name exist, you're not sure which
>> is being used.
>>
>> Maybe Fractint should have a "thorough" option where it seaches ALL
>> frm files even if it finds a formula, and presents the user with a
>> choice of which one to use, or at least give a warning, instead of
>> quietly quitting when a formula is found. This would slow
>> performance of course.
>>
>> Tim
>
>Noooo!

As I understand it, the slowdown to find the right formula would only
occur when starting up an image.  I don't find the time taken by my 486/33
to go through the non-duplicate formulas to be so great that I could not
wait a few seconds more than that to make sure I'm generating the right
image.  Since most of the time it takes a lot longer to generate images
than to find the formula (often several orders of magnitude), I just don't
see this slowdown as a big problem.  Now, if fractint had to do it per
pixel ... ;-)


- --
Mike Traynor

People who like this sort of thing will find this the sort of thing they like.
    Abraham Lincoln

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------------------------------

Date: Wed, 27 Aug 1997 10:03:43 -0400 (EDT)
From: [e-mail]
Subject: Re: (fractint) New Coloring Methods

In a message dated 97-08-26 22:49:41 EDT, you write:

<< We are about to start a truecolor development effort, and I'll be
 looking for people who want to participate.
  >>
Tim,
I definitely want to participate in the truecolor development.
Ron Barnett

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------------------------------

Date: Wed, 27 Aug 1997 10:20:35 -0400
From: [e-mail] (Grasso, Nick)
Subject: Re: (fractint) Matrox Millenium cards

>I have to tell that I USE fractint on win nt 4.0 in a 200 mhz pp, it
>runs very smooth in all resolutions, even 1024 x 768 with 256 colors,
>never have to boot in dos mode, but I cant think what else could be the
>problem for Bob, I also dont remeber the name of the video card on the
>machine, it only gives me 256 colors in 1024 x 768, true color only when
>it is in 640 x 480.

I tried fractint under NT last night (full screen DOS session of course)
and it worked with 320x200x256 and 640x480x16 but none of the VESA modes
worked. Each time I picked one, my monitor said that the synch signal was
out of range. In the settings for the Millenium, it lists all the modes
(640x480, 800x600, 1024x768, etc.) and I can hit the 'test' button for each
mode and they all work. I don't know why the card would be sending an
incorrect signal in a DOS session. (BTW, VESA is built into the Millenium's
BIOS - you don't have to run a TSR). If anyone knows the answer, please let
me know as it would be great to run fractint under NT. In the meantime I'll
try other DOS programs and I'll email a question to Matrox tech support.

Nick
[e-mail]


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------------------------------

Date: Wed, 27 Aug 1997 08:44:32 -0600 (MDT)
From: Jason Hine <[e-mail]>
Subject: (fractint) Truecolor Development

Tim,
    Well, I've not made much progress in the last week, as I've been
preparing resumes... I'm hoping to get a 'real' job so I can get my own computer
and actually program at home (what a concept!)  In the meantime, Damien has been
a real help with figuring out Fractint's .TGA header structure.  I hope to make
another attempt at reading ITERATES.TGA in by the middle of next week.

    As much as I'd love to be involved in the truecolor development effort,
it's probably a silly idea for me to get involved until I've done some more
graphics programming on my own... I am planning to purchase "Supercharged
Bitmapped Graphics" by Steve Rimmer, on advice from Damien.  Any other
suggestions?  On the slight chance that I turn out to be some kind of 'natural'
at graphics programming <^)) , I'll help if I can!

Jason

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------------------------------

Date: Wed, 27 Aug 1997 08:56:27 -0600
From: Bob Norton <[e-mail]>
Subject: Re: (fractint) Matrox Millenium cards

Nick,
  This is exactly the problem that I'm having. What video BIOS version do
you have running on your Matrox chip?

At 10:20 AM 8/27/97 -0400, Nick wrote:
>I tried fractint under NT last night (full screen DOS session of course)
>and it worked with 320x200x256 and 640x480x16 but none of the VESA modes
>worked. Each time I picked one, my monitor said that the synch signal was
>out of range. In the settings for the Millenium, it lists all the modes
>(640x480, 800x600, 1024x768, etc.)

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------------------------------

Date: Wed, 27 Aug 1997 11:28:18 -0400
From: [e-mail] (Grasso, Nick)
Subject: Re: (fractint) Matrox Millenium cards

At 08:56 AM 8/27/97 -0600, Bob wrote:
>Nick,
>  This is exactly the problem that I'm having. What video BIOS version do
>you have running on your Matrox chip?

Bob,
I'll check when I get home tonight and let you know. I don't think it's a
BIOS problem however.

Nick
[e-mail]


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------------------------------

Date: Wed, 27 Aug 1997 09:53:54 -0700
From: "Jay Hill"<[e-mail]>
Subject: Attaching frm to the posted par, was (fractint) Introducing myself

spratz... wrote

>There are so many different ways to distribute PARs, including having them
embedded in the gif89a file, that I can think of no reasonable way to make
*certain that the correct formula is being referred to.  But I wouldn't
object to seeing all the PARs on this list accompanied with their
corresponding formula.  Does anyone else feel this way?


I agree, repeating the formula with a reference to its orgin would be best.
[Peter Otterstaetter wrote
>The formula is part of the latest orgform distribution - I found it
in _G.FRM) - so I saw no need to post the formula too.
]
Then we can be sure what it is and if we already have the referenced
file, we're set.  Also since we should be using 19.6, putting the frm:
in front would allow instant viewing of the image.

Just my $.03 worth.

Jay



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------------------------------

Date: Wed, 27 Aug 1997 11:44:02 -0600
From: Rich Thomson <[e-mail]>
Subject: Re: (fractint) bug

In article <[e-mail]> ,
    "[e-mail]" <[e-mail]>  writes:
> When trying to draw juliabrots on my PC the scrren goes blank and then after
> 10
> minutes trying to find out the progression of drwaing the computer hangs up.

I have found that when fractint appeared to be "doing nothing" that
using showdot=b/20 I was able to see that indeed it was "doing
something".  You might try setting this so you can see the progress on
a per-pixel basis.
- --
  ``Between stimulus and response is the will to choose.''  -- Steven Covey
 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
     3D Paint: The Power to Create in 3D;        Rich Thomson
     email me for more info                [e-mail]

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Date: Wed, 27 Aug 1997 11:46:13 -0600
From: Rich Thomson <[e-mail]>
Subject: Re: (fractint) New Coloring Methods

In article <[e-mail]> ,
    "Damien M. Jones" <[e-mail]>  writes:
> [most] of the really cool coloring algorithms require access to
> the entire set of orbits.

Can you elaborate on these coloring algorithms?  How would you write
them as a formula in the vein I suggested earlier on the list?
- --
  ``Between stimulus and response is the will to choose.''  -- Steven Covey
 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
     3D Paint: The Power to Create in 3D;        Rich Thomson
     email me for more info                [e-mail]

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------------------------------

Date: Wed, 27 Aug 1997 11:55:55 -0600
From: Rich Thomson <[e-mail]>
Subject: (fractint) deep zoom: no F6 corners?

When I deep zoom into arbitrary precision, I seem to lose the ability
to edit/view the corner parameters.  ('z' screen, then F6)  Is this
a known limitation?
- --
  ``Between stimulus and response is the will to choose.''  -- Steven Covey
 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
     3D Paint: The Power to Create in 3D;        Rich Thomson
     email me for more info                [e-mail]

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Date: Wed, 27 Aug 1997 15:23:09 -0600
From: [e-mail] (Horacio Luna)
Subject: Re: (fractint) Matrox Millenium cards

Grasso, Nick wrote:

> I tried fractint under NT last night (full screen DOS session of
> course)
> and it worked with 320x200x256 and 640x480x16 but none of the VESA
> modes
> worked. Each time I picked one, my monitor said that the synch signal
> was
> out of range. In the settings for the Millenium, it lists all the
> modes
> (640x480, 800x600, 1024x768, etc.) and I can hit the 'test' button for
> each
> mode and they all work. I don't know why the card would be sending an
> incorrect signal in a DOS session. (BTW, VESA is built into the
> Millenium's
> BIOS - you don't have to run a TSR). If anyone knows the answer,
> please let
> me know as it would be great to run fractint under NT. In the meantime
> I'll
> try other DOS programs and I'll email a question to Matrox tech
> support.
>
> Nick
> [e-mail]

Then, the problem must be all in the video card, I have checked mine,
its a trident clone with 2 megs of ram (pretty cheap), and it works as I
said earlier. Sorry I couldn help you more.

Regards


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------------------------------

Date: Wed, 27 Aug 1997 14:27:45 -0600 (MDT)
From: Jason Hine <[e-mail]>
Subject: (fractint) Re: deep zoom: no F6 corners?

Rich,
    I have noticed this too.  The full number of decimal places shows
up when you press [TAB], but when you make a parameter file for a deeply
zoomed image, the corner locations are truncated.  This prevents folks
from using parameter files to create very deep-zoom movies, among other
things...  I'm going to guess it's a limitation of the data type that
Fractint is looking to read from a parameter file (double long float or
something like that, eh?)  Suprisingly, however, even though the corner
locations are truncated, the parameter file seems to be able to recreate
the exact image nonetheless!

    If there _was_ a way to produce a .par file with 100 digits of
accuracy on the corners, I'd be psyched!  I have my reasons...

Jason Hine

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Date: Wed, 27 Aug 1997 16:55:51 -0400
From: [e-mail] (Grasso, Nick)
Subject: Re: (fractint) Matrox Millenium cards

Horatio Luna wrote:

>Then, the problem must be all in the video card, I have checked mine,
>its a trident clone with 2 megs of ram (pretty cheap), and it works as I
>said earlier. Sorry I couldn help you more.

Horatio,
Thank you. You were very helpful! Before I saw your message I thought that
NT was incapable of running fractint, but now I know the problem is not NT.
Aren't there any other fractint users out there running NT?

Nick
[e-mail]


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Date: Wed, 27 Aug 1997 23:51:07 +0200
From: Serge Shumilov <[e-mail]>
Subject: Re: (fractint) Matrox Millenium cards

Grasso, Nick wrote:

> Thank you. You were very helpful! Before I saw your message I thought that
> NT was incapable of running fractint, but now I know the problem is not NT.
> Aren't there any other fractint users out there running NT?

I also use Fractint in Windows NT 4.0 with Matrox video card. But, I
have
Mistique with 2Mb. First time I also had the same problems. Now I
downloaded new driver from www.matrox.com and at least can work in the
640x480x16k mode. (And all SVGA modes with 256 colors also) As I have
seen,
new driver for Millenum also available.

Serge
[e-mail]

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Date: Wed, 27 Aug 1997 18:33:54 -0600
From: "Tim Wegner" <[e-mail]>
Subject: Re: (fractint) Re: deep zoom: no F6 corners?

>     If there _was_ a way to produce a .par file with 100 digits of
> accuracy on the corners, I'd be psyched!  I have my reasons...

This works just fine all the way up to 10^1500. It's just the <z>
screen you can't use, but you can save to a PAR file.

Tim


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Date: Wed, 27 Aug 1997 18:33:54 -0600
From: "Tim Wegner" <[e-mail]>
Subject: Re: (fractint) deep zoom: no F6 corners?

> When I deep zoom into arbitrary precision, I seem to lose the ability
> to edit/view the corner parameters.  ('z' screen, then F6)  Is this
> a known limitation?

Yes, it's a known limitation. Look at the <tab> screen and see how
much space is taken up by all the digits of the numbers. The <z>
screen would require a total rewrite to handel arbitrary precision.
For now you need to save to a PAR file and edit the file to get the
effect of the <Z> screen. Awkward but effctibve, and very quick
relative to the time of calculating a deep zoom fractal :-)

Tim


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Date: Wed, 27 Aug 1997 18:33:54 -0600
From: "Tim Wegner" <[e-mail]>
Subject: Re: (fractint) bug

> I have discovered a bug in fractint?
> When trying to draw juliabrots on my PC the scrren goes blank and then after 10
> minutes trying to find out the progression of drwaing the computer hangs up.
>
> Please Help Me?


CDould you please make a PAR file (using the <b> key) that
illustrates the problem? Or does it happen with any julibrot?

Tim


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Date: Wed, 27 Aug 1997 18:33:54 -0600
From: "Tim Wegner" <[e-mail]>
Subject: Re: (fractint) Searching for Formulas

Mike Traynor wrote:

> As I understand it, the slowdown to find the right formula would only
> occur when starting up an image.

Yes, this is correct. It would be a once-per-image slowdown.

I'm open to suggestions on formula file searching.

Tim




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Date: Wed, 27 Aug 1997 12:49:03 -0500
From: Barry Bluestein <[e-mail]>
Subject: Re: (fractint) Matrox Millenium cards

I must agree with those having problems with Fractint under NT 4.

I have tried to run Fractint under 2 different NT 4.0 boxes so far. Both are
P Pro 200 with 128 Mb of RAM. One uses the Number 9 128 series II with 8 Mb
of VRAM and the other uses the Matrox Millennium with 4 Mb of WRAM.

Neither one will run Fractint in anything higher than 640x480. 8 bit color
is only available at 320x200.

So far I have not bothered to dual boot either of these machines with DOS.

It's a great pity, too. I had really looked forward to being able to
generate some of the more time-consuming fractals under the P Pro 200's.

Any ideas as to why this would be the case?

Horacio Luna wrote:

> > Bob: I think your problem is that NT will not run *any* DOS program in
> > SVGA
> > modes. I have read several messages on various newsgroups saying that
> > NT
> > will not run fractint (or other SVGA programs) under NT except maybe
> > in
> > 320x200x256 or other simple modes. I have NT 4.0 but do not use it for
> > DOS
> > apps. I use OS/2 for fractint. When I get home tonight I'll try
> > running
> > fractint under NT and let you know. Can you boot to plain DOS and try
> > fractint? This would at least tell you if your Matrox chip is OK.
> >
> > Nick
> > [e-mail]
> >
>
> I have to tell that I USE fractint on win nt 4.0 in a 200 mhz pp, it
> runs very smooth in all resolutions, even 1024 x 768 with 256 colors,
> never have to boot in dos mode, but I cant think what else could be the
> problem for Bob, I also dont remeber the name of the video card on the
> machine, it only gives me 256 colors in 1024 x 768, true color only when
> it is in 640 x 480.
>
> Regards
>
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- --
Barry Bluestein
TeleJamaica Design Project Manager

USAID/Kingston
2 Hainning Rd
Kingsto 5, Jamaica, W.I.
809-926-5001 x3327




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Date: Wed, 27 Aug 1997 22:46:51 -0600 (MDT)
From: "Sean (and/or) Jaqueline" <[e-mail]>
Subject: (fractint) Someday I'll grow up and have my own CD-ROM!

  Hi, folks.  Been playing around a bit with the formula parser, and out
popped these pretties.......

==========================================================================

Compound_Mirror    { ; A computer bug's-eye-view
                     ; Sean M. Pratz, August 1997
                     ; [e-mail]
  reset=1960 type=formula
  formulaname=SMP_Quotient_G1 function=ceil/round
  center-mag=0.0209965/-6.96533/0.1814156/0.8613 float=y inside=0
  outside=real colors=@default.map
  }

Discoball_Mountain { ; Climb this one while wearing a white suit
                     ; and black shirt
                     ; Sean M. Pratz, August 1997
                     ; [e-mail]
  reset=1960 type=formula
  formulaname=SMP_Quotient_G1 function=sqr/trunc
  center-mag=-0.64302258082046480/-0.00378179939010030/266.6677
  float=y potential=255/1000/1 colors=@chroma.map
  }

Electric_Spider    { ; A new superhero's logo, perhaps?
                     ; Sean M.. Pratz, August 1997
                     ; [e-mail]
  reset=1960 type=formula
  formulaname=SMP_Quotient_G1 function=sqrt/round
  center-mag=0.0141699/1.52656e-016/15.28062/1/-90 float=y inside=0
  outside=real colors=@default.map
  }

Neon_Peacock       { ; An electric hen's dream-boy
                     ; Sean M. Pratz, August 1997
                     ; [e-mail]
  reset=1960 type=formula
  formulaname=SMP_Quotient_G1 function=cabs/round
  center-mag=-0.0399601/1.38778e-017/47.61905 float=y colors=@neon.map
  }

Surf's-Up!         { ; Wheeeeeeeeee!
                     ; Sean M. Pratz, August 1997
                     ; [e-mail]
  reset=1960 type=formula
  formulaname=SMP_Quotient_G1 function=sqr/trunc
  center-mag=0.30593/1.4791/2.117098 float=y logmap=yes
  colors=@gamma1.map
  }

Windshield_Chip    { ; Are you insured for fractal mishaps?
                     ; Sean M. Pratz, August 1997
                     ; [e-mail]
  reset=1960 type=formula
  formulaname=SMP_Quotient_G1 function=sqrt/round
  center-mag=0.00215336/1.52656e-016/15.28062 float=y inside=0
  outside=summ decomp=256 colors=@default.map
  }



frm:SMP_Quotient_G1 (XAXIS) {
  z = pixel:
  z = (fn1(z) + pixel) / (fn2(z) - pixel),
  |z| <= 42
}

==========================================================================
  (The usual caveat applies:  "I have a B&W monitor.  They look good to
me.  YMMV!")


  - Sean


- ---
      ****** Sean or Jaq Pratz * [e-mail] ******
      *     o  \ o / _ o      __|   \ /    |__      o _ \ o /  o    *
      *    /|\   |    /\  __\o  \o   |   o/   o/__  /\    |   /|\   *
      *    / \  / \  | \ /) |   (\  /o\  /)   |  (\ / |  / \  / \   *
      ***************************************************************


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------------------------------

Date: Thu, 28 Aug 1997 11:41:59 -0400
From: lelio <[e-mail]>
Subject: Re: (fractint) Searching for Formulas

 I think it would be a good thing to have Fractint search all the .frm files
for formulae.  I have gotton frustrated at times trying to find the right
file.

- -----Original Message-----
From: Tim Wegner <[e-mail]>
To: [e-mail] <[e-mail]>
Date: Wednesday, August 27, 1997 7:37 PM
Subject: Re: (fractint) Searching for Formulas



>Mike Traynor wrote:
>
>> As I understand it, the slowdown to find the right formula would only
>> occur when starting up an image.
>
>Yes, this is correct. It would be a once-per-image slowdown.
>
>I'm open to suggestions on formula file searching.
>
>Tim
>
>
>
>
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>Post Message:   [e-mail]
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Date: Thu, 28 Aug 1997 11:45:48 -0400
From: lelio <[e-mail]>
Subject: (fractint) electricity

 here's a deep zoom into a Mandelbrot  (It took about 2 hours on my Cyrix
6x86 PR166+)  but I thought it looked cool.

electricity        { ; A deep zoom into a Mandelbrot
                     ; Russel Maxwell
  reset=1730 type=mandel passes=1
  corners=-1.246469389453580168599/-1.246469389453580150989/0.380317350256\
  267535547/0.3803173502562676586974/-1.246469389453580221536/0.3803173502\
  56267605934 params=0/0 float=y maxiter=500000 inside=0
  colors=000512<3>E44G55I66K77M88<13>mCBoCBqBA<2>v97w97y77<2>z11z00z00<9>z\
  00z00x02<28>20w00y00z<10>00z<6>ffzllzsszzzz00z<6>00z<6>ffzllzsszzzz00z<6\
  >00z<6>ffzllzsszzzz00K00M00O00Q11S22U44W66Y98_<2>LKePOgTRiXUk`Yldam00z<8\
  >00e00c00b<14>00O00O00N00N00M<21>00B00B009<17>000000000000000<24>000301
  }





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------------------------------

Date: Thu, 28 Aug 1997 12:11:49 -0400 (EDT)
From: [e-mail]
Subject: Re: (fractint) New Coloring Methods

In a message dated 97-08-28 10:55:28 EDT, you write:

<< As I was trying to indicate, ITERATES.TGA seems to only provide the
 iteration count, regardless of what other coloring options you may have
 chosen.  Using outside=real will have no effect on the contents of
 ITERATES.TGA.
  >>
Damien,
Yup, you are right. I was just hoping that the code within fractint that
writes iterates.tga would be modified (by Tim maybe <g>) so that it writes
whatever is used for the color lookup instead. Then, for example, putting a
pseudo-continuous iteration value into real portion of z and selecting real
as the coloring method, iterates.tga would contain the pseudo-continuous
iteration value. It could be scaled beforehand, by say, 1000, so that the
data to the right of the decimal point would be included in the integer
written to iterates.tga. A simple formula example follows which would work if
fractint were modified in how it writes iterates.tga:

============================
TrueColor { ; formula to place a pseudo-continuous
            ; iteration value in the real portion
            ; of z.
        z = c = pixel
        i = 0
        zb = 0
        bailout = p1:
        IF (|z| <= bailout)
                z = z*z + c
                i = i + 1
        ENDIF
        IF (|z| > bailout)
                zb = z
                z = z*z + c ; These extra iterations
                z = z*z + c ; are added as suggested
                            ; by L. Vepstas to minimize
                            ; the error function
                z = i - log(log(cabs(z)))/log(2)
        ENDIF
        |zb| <= bailout
        }
===============================================

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------------------------------

Date: Thu, 28 Aug 1997 09:40:46 -0700
From: "Jay Hill"<[e-mail]>
Subject: Re: (fractint) Searching for Formulas

Looking for the lost formula?

PC Magazine MSDOS utility (1985 S.Holzner) called locate.com  (517 bytes)
will find a word in any file in one directory.

There is also grep.exe  (October 1984 Dr. Dobbs) which is even better.

Jay



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