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Internet Message Format | 1997-08-26 | 42KB

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Subject: fractint Digest V1 #8
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fractint Digest        Tuesday, August 26 1997        Volume 01 : Number 008



In this issue:

    Re: (fractint) New Coloring Methods
    (fractint) Matrox Millenium cards
    (fractint) [Announcement] Image Arithmetic 2.0 is released!
    Re: (fractint) Matrox Millenium cards
    Re: (fractint) Matrox Millenium cards
    Re: (fractint) Matrox Millenium cards
    Re: (fractint) Matrox Millenium cards
    Re: (fractint) Matrox Millenium cards
    (fractint) About me
    (fractint) Introducing myself
    Re: (fractint) Matrox Millenium cards
    (fractint) downloading files
    Re: (fractint) Matrox Millenium cards
    Re: (fractint) downloading files
    Re: (fractint) Introducing myself
    Re: (fractint) Introducing myself
    Re: (fractint) downloading files
    Re: (fractint) Introducing myself
    Re: (fractint) New Coloring Methods
    Re: (fractint) Introducing myself
    Re: (fractint) New Coloring Methods
    Re: (fractint) Introducing myself
    Re: (fractint) New Coloring Methods
    (fractint) Deep zoom bug

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: Mon, 25 Aug 1997 10:39:05 -0600
From: Rich Thomson <[e-mail]>
Subject: Re: (fractint) New Coloring Methods

In article <[e-mail]> ,
    [e-mail]  writes:
> << Also, when you have arrives at a few good formula examples of
>  coloring methods, we can add them to fractint.frm.  >>
>
> Tim, when I get back from vacation, I going to explore whether some of
> Damien's ideas can be used to implement the Linas Vepstas true coloring
> algorithm. I think it can be done, especially in conjunction with
> iterates.tga.

Hmm... I was thinking that when truecolor support is added, that you
would simply write a formula saying how the pixel would be colored.
We have formulas for complex numbers (two components), but formulas
involving colors have to carry around three components (perhaps even
four if you allow alpha channel support).  Colors also have a color
space associated with them.  RGB and HSV are useful colorspaces and
you might want to add support for others.  Here's a stab at some
intrinsic functions that would be useful in writing color formulas:

    colormap(x)
    Does colormap lookup for index x.  If x has a fraction, then
    interpolate between floor(x) and ceil(x).  Lookup is done modulo
    the colormap length.

    rgb(r, g, b)
    Specify an RGB color, r/g/b in 0-1 range

    rgba(r, g, b, a)
    Specify an RGB color with alpha coverage

    hsv(h, s, v)
    Specify an HSV color, hue in 0-360 range (or 0-2Pi), s/v in 0-1
    range.

    hsva(h, s, v, a)
    Specify an HSV color with alpha coverage

    interpolate(c1, c2, t)
    Interpolate between c1 and c2 by t: t*c1 + (1-t)*c2

When 24-bit support is finally added please don't overlook the alpha
channel (32-bit support).  Many cards can support 32-bit pixels in
the frame buffer and PNG can support transparency by having an alpha
channel.  I have gotten many wonderful effects from the M-set by using
the alpha channel keyed to the iteration somehow.  This is a powerful
feature and being able to write a formula to describe the coloring
will make it very handy.  I suppose one would write two formulas, one
for "inside" coloring and another for "outside" coloring.  I'd like to
see the inside/outside options made available somehow in the color
formula.  For instance, the decomposition options should be easy to
write in the color formulas.
- --
  ``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: Mon, 25 Aug 1997 10:55:16 -0600
From: Bob Norton <[e-mail]>
Subject: (fractint) Matrox Millenium cards

Does anyone know how to get Fractint working with a Matrox Millenium video
chip? It won't work with any of the Fractint drivers that I've tried. It's
an MGA 2064W B2 R2 chip with 4 Megs of VRAM.

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

Date: Mon, 25 Aug 1997 11:51:58 -0700
From: [e-mail] (Jon Noring)
Subject: (fractint) [Announcement] Image Arithmetic 2.0 is released!

Hello,

I just got the following announcement from Richard van Paasen, which will
be of great interest to fractal artists and enthusiasts.

Enjoy!

Jon Noring

*****************************************************************************

>From: [e-mail]
>Date: Mon, 25 Aug 1997 20:04:34 +0000
>Subject: Image Arithmetic 2.0 is released!
>Reply-to: [e-mail]


Announcement Image Arithmetic v2.0

A new tool for processing images
with very high resolutions.

- ------------------------------------------------------------
Download it from: <http://huizen.dds.nl/~buddha/>

* Image Arithmetic is a suite of FAST and EFFICIENT
  image processing tools that perform arithmetic on
  several images to combine them into one larger image.

* Image Arithmetic is a tool that can be used beside
  the "big one". It is designed for GRAPHIC ARTISTS
  who are working with images at large resolutions.

* Image Arithmetic can TILE, ADD, SUBTRACT, MULTIPLY,
  and compute DIFFERENCE to combine several images
  into one large image.

* Image Arithmetic is specially designed to handle
  images with very HIGH RESOLUTIONS: up to 65535 x 65535.
  Furthermore, it has virtually no memory requirements.

* Features of Image Arithmetic are:
  - Adds, subtracts, multiplies and computes difference
    of two or three images
  - Tiles a matrix of up to 36x36 images into one image.
  - Creates huge images, up to a resolution of 65535x65535
  - Has virtually no memory requirements
  - Performs fast, robust computation
  - Supports both truecolour and colour mapped images:
    TARGA, PCX, JPEG and PNG
  - Has an easy-to-use, task-oriented interface
  - Comes with a help file, covering a wide range of
    image arithmetic topics
  - Image Arithmetic is a 32-bit application and runs
    under Windows 95 and Windows 3.11 (with win32s).

Image Arithmetic can be downloaded from
    <http://huizen.dds.nl/~buddha/>

Richard van Paasen.

*****************************************************************************


_____________________________________________________________________________
 OmniMedia Digital Publishing | E-Books: http://www.awa.com/library/omnimedia
 9671 S. 1600 West St.        | Digital/Fractal Art: (coming soon!)
 South Jordan, UT 84095       |
 801-253-4037                 | E-mail: [e-mail]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


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

Date: Mon, 25 Aug 1997 17:09:16 -0400
From: [e-mail] (Grasso, Nick)
Subject: Re: (fractint) Matrox Millenium cards

Bob Norton <[e-mail]> wrote:

>Does anyone know how to get Fractint working with a Matrox Millenium video
>chip? It won't work with any of the Fractint drivers that I've tried. It's
>an MGA 2064W B2 R2 chip with 4 Megs of VRAM.

I have a Matrox Millennium 4Mb card and it works fine with fractint. I know
there are other fractint users that have this card also. Are you using the
FRACTINT.CFG file that came with Fractint 19.6? All the VESA Autodetect
modes work for me as well as the Millennium 1600x1200 mode. What exactly is
happening? What operating system are you using? Plain DOS or DOS mode under
Windows 95?

Nick
[e-mail]


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

Date: Mon, 25 Aug 1997 17:22:27 -0600
From: "Tim Wegner" <[e-mail]>
Subject: Re: (fractint) Matrox Millenium cards

Bob Norton asked:

> Does anyone know how to get Fractint working with a Matrox Millenium video
> chip? It won't work with any of the Fractint drivers that I've tried. It's
> an MGA 2064W B2 R2 chip with 4 Megs of VRAM.

I can't speak for this board in particular, but there's a general
answer. Fractint supports VESA 256 color modes, so the problem boils
down to getting your board to support VESA. Most boards either have
VESA built into the BIOS or have a little TSR program that adds VESA
support. Failing that, there is a shareware TSR called UNIVESA that
works pretty well for nearly every video board under the sun.

Remember that Fractint does not yet support truecolor - we're talking
256 color VESA modes. (Fractint does have some truecolor drivers
built in, but they don't do anything yet.)

Tim

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

Date: Mon, 25 Aug 1997 17:16:53 -0600
From: Bob Norton <[e-mail]>
Subject: Re: (fractint) Matrox Millenium cards

The Matrox chip is built into the motherboard of an Intergraph TD-310 with
2 200MHz Pentium Pro CPU's running NT4.0. On all but the simplest 2 color
modes I get a red screen that says my video card does not support this
mode. I am using the v19.6 FRACTINT.CFG file.

At 05:09 PM 8/25/97 -0400, Nick wrote:
>I have a Matrox Millennium 4Mb card and it works fine with fractint. I know
>there are other fractint users that have this card also. Are you using the
>FRACTINT.CFG file that came with Fractint 19.6? All the VESA Autodetect
>modes work for me as well as the Millennium 1600x1200 mode. What exactly is
>happening? What operating system are you using? Plain DOS or DOS mode under
>Windows 95?


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

Date: Mon, 25 Aug 1997 17:20:36 -0600
From: Bob Norton <[e-mail]>
Subject: Re: (fractint) Matrox Millenium cards

I have heard rumors that my video BIOS version may have VESA problems.
Unfortunately, the motherboard manufacturer didn't bother to implement the
BIOS udpate jumper that is needed to load the new BIOS. The message here is
NEVER buy an Intergraph. Where might I find a copy of UNIVESA?

At 05:22 PM 8/25/97 -0600, Tim wrote:
>I can't speak for this board in particular, but there's a general
>answer. Fractint supports VESA 256 color modes, so the problem boils
>down to getting your board to support VESA. Most boards either have
>VESA built into the BIOS or have a little TSR program that adds VESA
>support. Failing that, there is a shareware TSR called UNIVESA that
>works pretty well for nearly every video board under the sun.


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

Date: Mon, 25 Aug 1997 21:06:35 -0600
From: "Tim Wegner" <[e-mail]>
Subject: Re: (fractint) Matrox Millenium cards

> I have heard rumors that my video BIOS version may have VESA problems.
> Unfortunately, the motherboard manufacturer didn't bother to implement the
> BIOS udpate jumper that is needed to load the new BIOS. The message here is
> NEVER buy an Intergraph. Where might I find a copy of UNIVESA?

First, there's an interesting page that discusses this problem at

http://www.animatedsoftware.com/faqs/vesa_err.htm

On this page there's the following link:

http://www.animatedsoftware.com/ftp/p11_ftps.htm

I can't tell you if this a good or latest version - I found this info
searching for Univesa.

In the process of doing this, I remembered that the company is
scitech. I looked up their page, and found this:

http://www.scitechsoft.com/sdd.html

They have apparently changed the name of the product. The link listed
earlier must be older.

Let us know if this works.

Tim Wegner


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

Date: Tue, 26 Aug 97 14:26:13 +0100
From: "Guenther Pfannhauser" <[e-mail]>
Subject: (fractint) About me

Hi all!

Since I've joined this group a few days ago, I got many interesting
mails. As I can read, new users like to tell a little bit about
themselves. So I shall do the same. (You can read this before going to
bed, if you have sleeping-problems.:-)

My "first contact" (not the movie) with FRACTINT was, I  think 1990. In
this time I read somthing about fractals in a scientific magazin and
thought: "What the hell is that! It looks great!" So, therefore I
bought some shareware to create my own nice fractals. But - I hope no
one will treat me now - FRACTINT wasn't my first choice! But it was
included in that shareware-package. I used a DOS-program (I've
forgotten the name) with nice menus and mouse controlling (a little bit
"windows-spoiled") and found FRACTINT complicated to use. This program
was only able to create a mandelbrot-set and was also very, very, very
SLOW. As I get bored about this program (a few weeks after I started it
the first time) I tested the other programs I found in my package. And
one of these was FRACTINT 16.11. After printing the manual (took a very
loong time on my matrix printer) I read it :-). I have read of course,
only
these parts I needed to create a simple mandelbrot-set. I was amazed.
It took only seconds to finish the image - the other program needed
more than 10 minutes! - on my 286.

So at this point I wanted to know more about fractals. So I bought a
book. Which one? At that time I thought a book from the "discoverer" of
fractals Ben=F4it Mandelbrot couldn't be the worst. It really wasn't, bu=
t
it's a very hard stuff to read.

Now some things are different since my first fractal-creation:
Everything
changes (my operating-system - now using OS/2), get's faster (my
computer, FRACTINT), older (myself) but also better (FRACTINT and
myself again ;-).

Okay that's it!

If you are still awake I've a question (I think Jacco Burger has asked
this Q already):
How can I download the older mails of the list and more interresting:
which file should I
download?

Thanks and bye to all!
GP

- -------
E-mail: [e-mail]
visit my homepage: http://www2.htl-hl.ac.at/~3825/
- -------
LIVE LONG AND PROSPER!








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

Date: Tue, 26 Aug 1997 15:26:42 +0000
From: Peter Otterstaetter <[e-mail]>
Subject: (fractint) Introducing myself

- --Message-Boundary-737
Content-description: Mail message body
Content-Type: text/plain; charset="US-ASCII"

Hi friends,
My name is Peter Otterstaetter.  I'm a computer specialist and work
for the chemical industrie. I generate models for business processes
and advise our customers using the right modelling methods. Fractals
are a hobby of mine and I spend a lot of my spare time in exploring
fractals with fractint. Mostly I use formulas and/or parameters from
other authors and zoom in or out but sometimes I generate my own
pictures.

Some examples attached.

Enjoy

Peter

Attachments:
neu.par
- ----------------------------------------------------------------------
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)
- ----------------------------------------------------------------------


- --Message-Boundary-737
Content-description: Text from file 'NEU.PAR'
Content-Type: text/plain; charset="US-ASCII"


P_Untitled         { ; ZoomOut from Melissa D. Binde "Untitled I" image
                     ; [e-mail]
  reset=1960 type=barnsleyj1 passes=t
  center-mag=-6.82175e-005/7.75e-007/1.303227
  params=-0.02250748872756958/1.029216051101685 float=y maxiter=5000
  bailoutest=manr fillcolor=2
  colors=00000U60Z<56>wzzF9g<98>00AO9n<46>mJnM8n<34>J8fM8nJ8f<9>I7d
  }

P_SG-8-04          { ; ZoomIn into one of Sylvie Gallet's images
                     ; (Gallet-8-04 formula)
                     ; [e-mail]
  reset=1960 type=formula formulafile=fractint.frm
  formulaname=Gallet-8-04
  center-mag=0.671149/0.425616/7.882359/1/47.499 params=5/0/2.7/1.3
  float=y maxiter=2000 inside=0 biomorph=128 periodicity=0
  colors=000L00<4>R00S00V50<4>fT0iY0lb0og0ne3<15>800<10>jED<32>52231121100\
  0000<30>000001001012013<39>4OW5PX5PX6QX<2>8RX9SYATYBUZDV_<39>zzzendfod02\
  3<14>1Uf<2>1P_1NX1LU1JR1HP<7>123000100<13>J00
  }


Autobahn           { ; fractal highway
                     ; [e-mail]
  reset=1720 type=lyapunov passes=1
  center-mag=+2.99999999999999900/+3.25000000000008100/1.333333
  params=0/0.5/0 float=y maxiter=500 inside=0
  colors=000JG9<34>JaTKbUKbUKbU<67>YB5<3>4Fj<14>M`kOblOal<36>41y41y52x<76>\
  qeAqeAqdA<8>q_E
  }

Fraktal-Insel      { ; fractal island
                     ; [e-mail]
  reset=1960 type=mandel
  center-mag=-0.76076526975644600/-0.09017845962456950/31915.43/-5.1363/18\
  0 params=0/0 float=y maxiter=5000 inside=0
  colors=000<22>000pruwwztuxwwzsuxvvyrtwuvyrtvtuxqsvsuxprurtworurtvnqtqsvm\
  qsprumpsorulprnqtkormqsjoqmpsinqlprhmpkorhmojoqgloinqflnhmpeknhmodkmgloc\
  jlflnbjleknbikdkmahkcjl`hjbjl_gibikZgiahkYfh`hjYfh_giXegZgiWegYfhVdfYfhU\
  ceXegTceWegTbdVdfSbdUceRacTceQabTbdP`bSbdO`aRacN_aQabNZ`P`bMZ_O`aLY_N_aK\
  YZNZ`JXZMZ_IXYLY_IWYKYZHWXJXZGVWIXYFUWIWYEUVHWXDTVGVWDTUFUWCSTEUVBSTDTVA\
  RSDTU9RSCST8QRBST7PQARS8QR9RS7PQ8QR7MN7PQ6JK7MN5GH6JK4DD5GH3AA4DD277<11>\
  0ZP<2>LlfSpmZusfzzfrt<3>dJXcARaAQ<14>000<54>000
  }

Erleuchtet         { ; buddha
                     ; [e-mail]
  reset=1960 type=quatjul passes=1
  center-mag=+0.00782013685239835/+0.41460234680572730/2.109705
  params=-0.745/0/0.113/0.05/0/0 float=y maxiter=200 inside=0
  periodicity=0
  colors=000xyyyxzyxxxxxwxxxwyxwwwwwvwwwvxwvvvvvuvvvuwvuuuuutuuutvutttttst\
  ttsutsssssrsssrtsrrrrrqrrrqsrqqqqqpqqqprqpppppopppoqpooooonooonponnnnnmn\
  nnmonmmmmmlmmmlnmlllllklllkmlkkkkkjkkkjlkjjjjjijjjikjiiiiihiiihjihhhhhgh\
  hhgihgggggfgggfhgfffffefffegfeeeeedeeedfedddddcdddcedcccccbcccbdcbbbbbab\
  bbacbaaaaa`aaa`ba`````_```_a`_____Z___Z`_ZZZZZYZZZY_ZYYYYYXYYYXZYXXXXXWX\
  XXWYXWWWWWVWWWVXWVVVVVUVVVUWVUUUUUTUUUTVUTTTTTSTTTSUTSSSSSRSSSRTSRRRRRQR\
  RRQSRQQQQQPQQQPRQPPPPPOPPPOQPOOOOONOOONPONNNNNMNNNMONMMMMMLMMMLNMLLLLLKL\
  LLKMLKKKKKJKKKJLKJJJJJIJJJIKJIIIIIHIIIHJIHHHHHGHHHGIHGGGGGFGGGFHGFFFFFEF\
  FFEGFEEEEEDEEEDFEDDDDDCDDDCEDCCCCCBCCCBDCBBBBBABBBACBAAAAA9AAA9BA9999989\
  998A98888878887987777767776876666656665765555545554654444434443543333323\
  3324322222122213211111011102100<2>000zzzyzzzyzzyyyyy
  }


- --Message-Boundary-737--

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

Date: Tue, 26 Aug 1997 10:14:58 -0400
From: [e-mail] (Grasso, Nick)
Subject: Re: (fractint) Matrox Millenium cards

>At 05:09 PM 8/25/97 -0400, Nick wrote:
>>I have a Matrox Millennium 4Mb card and it works fine with fractint. I know
>>there are other fractint users that have this card also. Are you using the
>>FRACTINT.CFG file that came with Fractint 19.6? All the VESA Autodetect
>>modes work for me as well as the Millennium 1600x1200 mode. What exactly is
>>happening? What operating system are you using? Plain DOS or DOS mode under
>>Windows 95?

Bob Norton <[e-mail]> wrote:
>The Matrox chip is built into the motherboard of an Intergraph TD-310 with
>2 200MHz Pentium Pro CPU's running NT4.0. On all but the simplest 2 color
>modes I get a red screen that says my video card does not support this
>mode. I am using the v19.6 FRACTINT.CFG file.

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]


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

Date: Tue, 26 Aug 1997 17:53:06 +0200
From: Jacco Burger <[e-mail]>
Subject: (fractint) downloading files

Hi there,

Some days ago I asked this question about downloading a file with previous
messages. In the meantime I noticed there are others with the same
question, so I decided to send this message.

I received a reply from Damien Jones (if there is a Academy Award for
Fractint-wizards, I would nominate him). This is the trick: send a message
to [e-mail] with in the body:

get fractint archive/fractint.9708

Warning: the file that you get in return is quite large. If you decide to
make a printout I suggest you delete the ' Thanks for using Fractint, The
Fractals and Fractint Discussion List ' and the next few lines which are at
the end of every message. That saves quite a few pages.

I haven't read all of it yet, but I can really recommend to download this
file if you have joined the Fractint-list recently!

Jacco Burger

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

Date: Tue, 26 Aug 1997 11:33:59 -0600
From: [e-mail] (Horacio Luna)
Subject: Re: (fractint) Matrox Millenium cards

> 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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Date: 26 Aug 97 12:30:46 EDT
From: George Martin <[e-mail]>
Subject: Re: (fractint) downloading files

Amanda, is that you?


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Date: Tue, 26 Aug 1997 09:39:48 -0700
From: "Jay Hill"<[e-mail]>
Subject: Re: (fractint) Introducing myself

Peter Otterstaetter posted this par without the formula.

What if the frm:  ?

P_SG-8-04          { ; ZoomIn into one of Sylvie Gallet's images
                     ; (Gallet-8-04 formula)
                     ; [e-mail]
  reset=1960 type=formula formulafile=fractint.frm
  formulaname=Gallet-8-04
  center-mag=0.671149/0.425616/7.882359/1/47.499 params=5/0/2.7/1.3
  float=y maxiter=2000 inside=0 biomorph=128 periodicity=0
  colors=000L00<4>R00S00V50<4>fT0iY0lb0og0ne3<15>800<10>jED<32>52231121100\
  0000<30>000001001012013<39>4OW5PX5PX6QX<2>8RX9SYATYBUZDV_<39>zzzendfod02\
  3<14>1Uf<2>1P_1NX1LU1JR1HP<7>123000100<13>J00
  }



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Date: Tue, 26 Aug 1997 10:42:10 -0600
From: Rich Thomson <[e-mail]>
Subject: Re: (fractint) Introducing myself

In article <[e-mail]> ,
    "Jay Hill"<[e-mail]>  writes:
> Peter Otterstaetter posted this par without the formula.
>
> What if the frm:  ?

He's using a formula from the fractint.frm file distributed with
fractint.
- --
  ``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: Tue, 26 Aug 1997 14:20:27 -0400
From: [e-mail]
Subject: Re: (fractint) downloading files

Thanks for the hint, Jacco. I discovered that the files are also available
at:

ftp.xmission.com/pub/lists/fractint/archive.

FTP is possibly a better way to access these files if you have restrictions
on the volume of mail in your inbox.

Bill Decker



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Date: Tue, 26 Aug 1997 15:12:56 -0400
From: Sylvie Gallet <[e-mail]>
Subject: Re: (fractint) Introducing myself

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 =3D 0
              ; p1 =3D exponent
              ; p2 > 1
   z =3D zn =3D pixel , ex =3D p1 - 1
   IF (p2 || imag(p2))
      k =3D p2
   ELSE
      k =3D 1
   ENDIF
   :
   znex =3D zn^ex , num =3D znex*zn - 1 , mnum =3D |num|
   den =3D p1*znex , zn =3D zn - num/den
   IF ( mnum > |z^p1-1|)
      z =3D zn * k
   ENDIF
   mnum >=3D 0.001
   }

        -  Sylvie Gallet

- ------------------------------------------------------------------
    [e-mail]
    http://spanky.triumf.ca/www/fractint/sylvie/gallet.html
- ------------------------------------------------------------------


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Date: Tue, 26 Aug 1997 21:45:45 -0400 (EDT)
From: [e-mail]
Subject: Re: (fractint) New Coloring Methods

In a message dated 97-08-22 23:49:39 EDT, you write:

<< The biggest problem is that you need access to the last z value for the
 no-stepping algorithm, and you really need more than 256 colors to do a
 good job.   >>
Damien:
My TrueMand Program uses Fracting color maps and interpolates between the
colors to provide smooth transitions and therefore have "millions" of colors.
TrueMand uses the Vepstas algorithm. Check out the TrueColor gallery on my
web page (via IFL :-) ). The last z value is available in Fractint as LastSq
(I may have the name wrong, but its something like that). My intent is that
the pseudo continuous iteration value be calculated within the formula
parser, then multiplied by, say 1000, and the integer part equated to Z.Real,
using the real option in Fractint. That should provide iterates.tga with the
pseudo-continuous interation value times 1000. After appropriate treatment of
iterates.tga, a 256000 color fractal should result.
Ron Barnett

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Date: Tue, 26 Aug 1997 22:17:41, -0500
From: [e-mail] (MR CHARLES F CROCKER)
Subject: Re: (fractint) Introducing myself

Hi

Lets carry the quotes one level deeper but condense them. The subject line
gets a little off track.

>>>Jay Hill wrote "Peter Otterstaetter posted" and Sylvie Gallet answered
with the formula.

Fractint can be mislead into writing the wrong source for a formula into a
parameter file. This really doesn't hurt because it is very thorough in
searching your formula directory when the named source is wrong.But, there
always is a but, it will only find one. Orgform is very thorough in
compiling any formula file you give it, even filing away duplicate names
and formulas in a seperate file. After a period of use the directory
becomes a little disorganized. Fractint presents the list nicely organized
but when it does a search it goes through the files in the order they
appear in the directory. At the moment my setup has the _l_dup.frm
appearing before the _l.frm file so it ends the search at the duplicated
name, with sometimes disasterious results. Tim Wegner is open to
suggestions that anyone might make about what search method they would like
to see.

To get even farther away from the subject I notice that when anyone with a
Compuserve address posts a parameter file that every equal sign is followed
by 3D. Apparently their mail program is set for a line length of 72 and any
line it wraps ends with =, and any line that starts with an equal sign the
next character is turned into its ASCII hex code. Anyone else notice this?
It could cause some problems for a beginner. This wouldn't be the first
time I have seen a strange happening that as far as I can tell nobody else sees.

Charles

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Date: Tue, 26 Aug 1997 22:20:07 -0400
From: "Damien M. Jones" <[e-mail]>
Subject: Re: (fractint) New Coloring Methods

Ron,

 - My intent is that the pseudo continuous iteration value be calculated
 - within the formula parser, then multiplied by, say 1000, and the integer
 - part equated to Z.Real, using the real option in Fractint. That should
 - provide iterates.tga with the pseudo-continuous interation value times
1000.

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 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: Tue, 26 Aug 1997 21:46:31 -0600
From: "Tim Wegner" <[e-mail]>
Subject: Re: (fractint) Introducing myself

Charles Crocker wrote:

> Fractint can be mislead into writing the wrong source for a formula into a
> parameter file. This really doesn't hurt because it is very thorough in
> searching your formula directory when the named source is wrong.

I would like suggestions for a better behavior by fractint in
searching for formulas. In fact there probably needs to be more than
one behavior that the user can select.

I'm very ambivalent about the ability of Fractint to search for
formulas. As Charles pointed out, it means that 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


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Date: Tue, 26 Aug 1997 21:46:31 -0600
From: "Tim Wegner" <[e-mail]>
Subject: Re: (fractint) New Coloring Methods

> 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.

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.

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

Tim



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Date: Tue, 26 Aug 1997 23:16:15, -0500
From: [e-mail] (MR CHARLES F CROCKER)
Subject: (fractint) Deep zoom bug

Hi

A few days ago Damien Jones posted two parameter files showing an odd
effect in a pure Mandelbrot plot that was due to changing the bailout value
when in extended precision. I did a little exploring in the area and came
up with some even odder results. Here are two highlights.

Julia?             { ; Bailout 24
                     ; Funny background dividing lines.
                     ; Looks like a Julia even though it can't be.
                     ; P90 320X200 time  0:13:44.77
  reset=1960 type=mandel passes=1
  center-mag=0.28044855475171592214234254/0.48353563883582895058143262/2.4\
  71965e+021 params=0/0 float=y maxiter=10000 bailout=24 inside=0
  periodicity=0
  colors=000001<10>N0DP0ER0ET0FV0GX0J<9>p0U<4>zcqyUkwKfuA_s0U<7>c0Na0M_0K<\
  17>000100211511622<2>D44F55G55<5>T9AVABXAD<3>dDFfDGhEHjFIlFJnGKpGKrPTtY`\
  vgjxprzzzyqswhiu_bsRUqHL<4>gFHeEGcDGaCF_CFYBDWADUAB<5>I67G56D55B44944733\
  <3>000<14>TM0VN0XP0ZR0zS0bz0dVz000hY0<3>pc0rd4tf8veCxgGzgKyfGwfCud8sd4qd\
  0<25>210000011<13>0TF0VG0XJ<4>0fN0hO0jQ<2>0pT6rVCtYIvaOxdUzfOycIwaCuY6sW\
  0qS<25>020
  }

Crystal_defect     { ; Bailout 32
                     ; ;
                     ; ;
                     ; P90 320X200 time  0:04:25.78
  reset=1960 type=mandel
  center-mag=0.2804485547517159221410074068362/0.4835356388358289505882034\
  10628/6.41868e+026 params=0/0 float=y maxiter=10000 bailout=32
  inside=0
  colors=000001<10>N0DP0ER0ET0FV0GX0J<9>p0U<4>zcqyUkwKfuA_s0U<7>c0Na0M_0K<\
  17>000100211511622<2>D44F55G55<5>T9AVABXAD<3>dDFfDGhEHjFIlFJnGKpGKrPTtY`\
  vgjxprzzzyqswhiu_bsRUqHL<4>gFHeEGcDGaCF_CFYBDWADUAB<5>I67G56D55B44944733\
  <3>000<14>TM0VN0XP0ZR0zS0bz0dVz000hY0zz00`0nb0pc0rd4z00veCxgGzgKyfGwfCud\
  8sd4qd0<25>210000011<13>0TF0VG0XJ<4>0fN0hO0jQ<2>0pT6rVCtYIvaOxdUzfOycIwa\
  CuY6sW0qS<25>020
  }

I changed a few colors to make it easier to see the transitions. Zooming
out from Julia? shows the path I took in and the amount of structure that
shows up. Reducing the bailout to clear up the background doesn't work. At
16 or lower the image disappears. It is tempting to guess that there is a
baby Minibrot at the center of the four arm spiral. It persists up to a
magnification of 2E30 where I quit. Is this one of the whirlpools of self
similarity Tim speaks of?

I don't remember what led me to Crystal_defect but other odd things happen
here. Gradually raising the bailout at first makes the pattern more
distinct and then more pixel colors appear. At 255 almost the whole
screen is chaotic. At 256 the whole screen goes high count. Zooming in on
the chaotic area doesn't seem to change anything up to at least 2E29. Here
my patience gave out again.

Zooming in on the single red pixel in the Crystal_defect shows form
attached to the apparent random speckles, but few red pixels appear for
several maximum zooms. By about 2.7E36 the pattern is parallel red lines
that are broken by what seem to be incipient new patterns. I gave up again.

All of which doesn't give any answers but it's fun to speculate.

Charles

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