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fractint-digest       Thursday, December 9 1999       Volume 01 : Number 427




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

Date: Tue, 30 Nov 1999 01:26:39 EST
From: [e-mail]
Subject: Re: (fractint) Fractal Creations 2nd Edition

I agree with Wizzle. I've been watching out for a copy for a year now. I've
seen only one listing which zipped away before my email order got processed.
Still watching:)

~ren

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

Date: Mon, 8 Nov 1999 12:42:29 -0300
From: "Alejandro Gustavo Kainer" <[e-mail]>
Subject: RE: (fractint) Fractal Creations 2nd Edition

What is the name of the book? Fractal Creations? Though we in Argentina
import English written books I'm not usually searching bookstores looking
for Tim's books, maybe because I didn't know he had written one... Please do
tell me (you, Tim, anyone) so I could buy it or request it. Have a nice
tuesday :))

@le

PS: Btw, I was wrong. Ours is GMT -3 (and NOT GMT +3). Thanks given to
Miguel Fliguer ;). Still having my old batteries... (it's 7:50, November
30th, 1999 and NOT November 8th, 12:42...).

- -----Mensaje original-----
De: kathy roth <[e-mail]>
Para: [e-mail] <[e-mail]>
Fecha: Martes 30 de Noviembre de 1999 01:50
Asunto: Re: (fractint) Fractal Creations 2nd Edition


Damien M. Jones wrote to Tim Wegner about Fractal Creations:

> I am teasing a little bit (gosh it feels great to be in a good mood!) but
> I'm sure many people would love to be able to read this material.
>


Yes, the first few chapters made clear to me
what I had waded through some other sources and
did not get, and were fun to read, too.
Kathy

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

Date: Tue, 30 Nov 1999 06:55:02 -0500 (EST)
From: [e-mail]
Subject: [none]

I have just come back to using Fractint after a few years and am trying to create Targa files from 3D transformations but am ending up with a lovely blue picture. From the top to the bottom, nothing but blue. As shades of blue go it IS a pleasant hue but, it's not what I want. Does anyone know what I'm doing wrong?

Thanks

- ----------------------------------------------------------------
Get your free email from AltaVista at http://altavista.iname.com

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

Date: Tue, 30 Nov 1999 12:55:31 +0100
From: Ralph Feltens <[e-mail]>
Subject: Re: (fractint) Fractal Creations 2nd Edition

Hello Tim!

I would like to get this book, too. And there are certainly a lot of
other people who would like to obtain this source of fractal and
fractint information as well ...

Ciao

            Ralph

David Jones wrote:

> Do it as an e-book. Wired News had something about a
> company that was offering something along those lines
> which would be just about perfect for something like your
> book.


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

Date: Tue, 30 Nov 1999 08:03:29 -0500
From: Lee Skinner <[e-mail]>
Subject: (fractint) Fractal Creat

Tim,

Jon Noring publishes e-books.

Lee

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

Date: Tue, 30 Nov 1999 15:56:32 EST
From: [e-mail]
Subject: Re: (fractint) German teachers training

In einer eMail vom 28.11.1999 13:57:27 (MEZ) Mitteleurop=E4ische Zeit schrei=
bt=20
[e-mail]:

> Last month I held a seminar on fractint for Primary school teachers ...

Congratulations on your idea of teaching teachers computergraphics and show=20
them and their pupils *The Beauty of Fractals*.
In your homepage I read that you treated the fractal pictures afterwards wit=
h=20
PSP and other graphic programms. This has the disadvantage that on saving yo=
u=20
lose the fractal information. Why not use fractints palette editing=20
facilities?
You can change each of the 256 colors separately and create smoothly shaded=20
ranges of colors.=20
Coloring is not only a point of aesthetics but also a means of bringing out=20
hidden structures. The following two simple par files will show what I mean.=
=20
They are basically the same picture, one made with random colors, the other=20
with colors that emphasize the spiral form.=20

Marie-Luise Beyer

spirbunt           { ; random colors
  reset=3D2000 type=3Djulia
  center-mag=3D-0.0938539/0.170495/135.1038/1.0209/90
  params=3D-0.204812/-0.663316 maxiter=3D255 inside=3D0
  colors=3D000cYUVOLR67MECusdfaSSLF1rKKw7NMIJGDGA8botU_bLKLL5NxUT<2>PA9qoZ<2=
\
  >NGB`xq<2>JIF1xd0QJ5ID9B8ztrWs3Pa3JL3rDg<2>N6DfdA<2>KD4uFtfBbS7L2Gb<2>B7\
  ChSUYKLNCCr8O<2>N58XJz<2>I7I7nf<2>CFDnwlWWQTnRLRFmFT`BKP7BR7e<2>G4CDeZDN\
  JjOJ<2>L97Cg2<2>DE3gYkXOXNEIBxLCWCkIw<2>L7H4lA<2>BF493ETab<2>HCCiZ_<2>LB\
  BzqRaTFn9mW6QmZC`O9PE6Lb08Tt<2>CAGuh39uWBVHDFBDB8D75eD_WAPM7EIrnFTREi8DW\
  6DI4DRODFD8_cAPRCEFguSSVFju2sBhmqwG7Mr60<2>N43iXP<2>LB811L73CkdF_SBOG7YY\
  3<2>IB3fGF<2>K76gZ26RYryhSsuKUUXP1QI2JB3c1mQ3QYSUqWOXIDViO<2>HE8WXyAI8BD\
  6C84GcI9uiBcVCMH8MyasDTa9LL6t8I<2>O564PXSFpNB_I7JTdFLM9J3SH4LG4FE49AVXBM\
  NCDDN3EKnD<2>EF5cWc6K3<2>C839dlBMQGJy<2>D7H3_p<2>BCFdeW<2>KDAjjV5kV8XLHd\
  oJZnLUm<2>HaUGcOGBwQqmxZ3<3>777lgb
  }
spirneon           { ; clever coloring; by Branderhorst
  reset=3D2000 type=3Djulia
  center-mag=3D-0.0938539/0.170495/135.1038/1.0209/90
  params=3D-0.204812/-0.663316 maxiter=3D255 inside=3D0
  colors=3D000000<24>mGOoGPqHQ<3>zKU<19>O8CM7BK6A<3>C46A45834<2>211000000<9>=
\
  000000000<2>000010030<23>0n00p00r0<3>0z0<25>0C00A0080<2>020000000<9>0000\
  00000<2>000110330<23>nn0pp0rr0<3>zz0<25>CC0AA0880<2>220000000<29>000
  }


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

Date: Tue, 30 Nov 1999 13:35:39 -0800 (PST)
From: noel <[e-mail]>
Subject: Re: (fractint) Joining Fractint Discussion List

    The page at spanky describing how to join the
    fractint listserver is at:

http://spanky.triumf.ca/www/fractint/listserver.html

    regards,
    Noel


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

Date: Tue, 30 Nov 1999 20:04:00 -0600
From: Tim Wegner <[e-mail]>
Subject: (fractint) Targa

"Fastcar" asked:

>>
I have just come back to using Fractint after a few years and am
trying to create Targa files from 3D transformations but am ending
up with a lovely blue picture. From the top to the bottom, nothing
but blue. As shades of blue go it IS a pleasant hue but, it's not
what I want. Does anyone know what I'm doing wrong?
>>

We may have broken Targa support in version 20.0. We are looking
into it, and if so we will be releasing a bugfix version 20.1 (actually,
I know enough fixes to justify a 20.1 any way.

I suggest you try version 19.6, and if you still have trouble, let me
know. I haven't looked at Targa for a *long* time, but I believe it
worked in 19.6.

Tim


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

Date: Tue, 30 Nov 1999 20:04:00 -0600
From: Tim Wegner <[e-mail]>
Subject: Re: (fractint) Fractal Creations 2nd Edition

A number of people have suggested a softcopy version of Fractal
Creations 2nd Edition.

Unfortunately the Waite Group never supplied me with the final
Pagemaker files. I have Word files of the last version I sent them,
without all the edits that I submitted as redlines on printouts. I have
all the GIF files for illustrations I created, but of course I do not
have the Waite Group produced artwork. The rights ARE mine. The
Waite Group gave them up when the book went out of print.

There are a number of approaches that could be taken, from
scanning the book to editing and upgrading the Word files. I am
open to the idea, but I am also well aware of the huge effort
needed. I am not saying no, but quite frankly I would rather spend
*my* time working on the Fractint port to
Windows/Linux/Macintosh which has been hard enough to carve
out time for.

There's a possibility that I could turn Fractal Creations into
something with a "GPL" type license and we could make it's
resurrection a group project. That's probably the only way it would
get done.

Tim


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

Date: Tue, 30 Nov 1999 21:11:37 EST
From: [e-mail]
Subject: (fractint) Error message when starting FRACTINT...

Hi to All,

I downloaded AOL version 5 and since the download I get an error message when
I try to use FRACTINT vers. 20.

The message states: File FRACTINT.CFG is missing or invalid.

I replaced the file FRACTINT.CFG with the back-up copy that I maintain in
another directory. With the replacement CFG in place I still get the error
message.

Can anyone please help.

Regards and thanks in advance,

- --Bob Carr--(Ocala, FL  USA)

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

Date: Tue, 30 Nov 1999 20:14:24 -0600
From: Tim Wegner <[e-mail]>
Subject: RE: (fractint) Fractal Creations 2nd Edition

@le wrote:

> What is the name of the book? Fractal Creations? Though we in Argentina
> import English written books I'm not usually searching bookstores looking
> for Tim's books, maybe because I didn't know he had written one... Please do
> tell me (you, Tim, anyone) so I could buy it or request it. Have a nice
> tuesday :))

Actually my various books have been translated into quite a few
languages. Off the top of my head Portuguese, Italian, German,
and Spanish. but some of these were Image Lab rather than
Fractal Creations. I'll have to look and see what I have.

Tim


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Date: Tue, 30 Nov 1999 20:20:46 -0600
From: Tim Wegner <[e-mail]>
Subject: Re: (fractint) Error message when starting FRACTINT...

Hi Bob,

> I downloaded AOL version 5 and since the download I get an error message when
> I try to use FRACTINT vers. 20.
>
> The message states: File FRACTINT.CFG is missing or invalid.

Search your entire system for fractint.cfg. You can do this one
drive at a time by clicking on RUN and then FIND.

Perhaps your PATH was changed when you installed AOL 5, and
now Fractint finds an old version of Fractint.cfg. Fractint searches
all the directories listed in your PATH environment when looking for
fractint.cfg.

Fractint SHOULD work OK if fractint.cfg is in the current directory
when you start fractint. But if you just rename all your old versions
of Fractint.cfg to something else, and make sure that Fractint.cfg
is copied into a directory in your PATH. To see your path, open a
DOS window and type:

echo %PATH%

Tim


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Date: Tue, 30 Nov 1999 23:58:06 EST
From: [e-mail]
Subject: Re: (fractint) Error message when starting FRACTINT...

Hi Tim,

<< But if you just rename all your old versions of Fractint.cfg to something
else, and make sure that Fractint.cfg is copied into a directory in your
PATH. To see your path, open a DOS window and type:

 echo %PATH% >>

Tim, I'm DOS very stupid. I have no idea how to open a DOS window. I tried
typing it in at the DOS prompt but nothing happened. Could you explain this
to me another way?

All other FRACTINT.CFG files were renamed and there was no change in the
problem.

Regards,

- --Bob Carr--

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

Date: Mon, 8 Nov 1999 13:43:37 -0300
From: "Alejandro Gustavo Kainer" <[e-mail]>
Subject: RE: (fractint) Fractal Creations 2nd Edition

No, no, no, Tim. Maybe I wasn't that clear. I only wanted to know if the
name of this book that the list is talking about was Fractal Creations, and
if anybody had the faintest idea (anybody means you, hehe) if this book was
distributed beyond the limits of the USA. Look, I know that it's easier for
me to go looking or asking at the bookstores, but maybe you knew that. I can
read it in English, of course, and I would like to, because sometimes
translations are terrible. AND I'm not asking you a copy of your book,
please don't misunderstand me. I just wanted to know where I can find it, or
if I have to buy it via Internet or the like.

Btw, what are your other books about? Photography? What are their names?

Thank you for answering :))

@le

- -----Mensaje original-----
De: Tim Wegner <[e-mail]>
Para: [e-mail] <[e-mail]>
Fecha: Martes 30 de Noviembre de 1999 23:12
Asunto: RE: (fractint) Fractal Creations 2nd Edition


@le wrote:

> What is the name of the book? Fractal Creations? Though we in Argentina
> import English written books I'm not usually searching bookstores looking
> for Tim's books, maybe because I didn't know he had written one... Please
do
> tell me (you, Tim, anyone) so I could buy it or request it. Have a nice
> tuesday :))

Actually my various books have been translated into quite a few
languages. Off the top of my head Portuguese, Italian, German,
and Spanish. but some of these were Image Lab rather than
Fractal Creations. I'll have to look and see what I have.

Tim


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

Date: Wed, 1 Dec 1999 01:43:53 -0500 (EST)
From: Jim Muth <[e-mail]>
Subject: (fractint) Re: 2D slices of Julibrot

At 08:02 PM 11/29/99 -0500, John Goering wrote:

              <snipped>

>This appears to create an M-set that has been magnified by a factor of
>the sqrt(2).  Apparently, slicing the Julibrot at this particular angle
>exposes a magnified M-set.  Does anyone know why this happens?

It happens because there actually are two slices that cut the 4-D
Julibrot in perfect Mandelbrot sets.  The multirot-XY-ZW formula below
draws this oversized M-set if p1 is set to 45,45  p2 and p3 are set
to 0, and the functions are set to ident,flip.  I call this second
M-set the shadow set.  It is double-rotated halfway between the
Mandelbrot and Julia planes.

>2) I sure wish that Fractint had 8 parameters for formulas instead of
>just 6.

Me too!  10 would be even better.  Developers, hint, hint.

>3) If anyone would like to see the mathematical derivation of this
>formula, I would be willing to post it.

Yes, post the math derivation.  I'm still trying to find a single
formula that with only 6 variable parameters can draw all the oblique
slices through any point of the the Julibrot.

The two formulas below can fix any point in the 4-D Julibrot on the
screen and rotate the slice around this point.  But I had to give up
some rotations to achieve this.  The rotations, which are set by p1,
are in degrees.  The second formula works only with the two functions
set to ident,flip or flip,ident.  You will soon recognize the slices.
I have given the four new slices the names Parabolic, Oblate, Elliptic
and Rectangular to go with the well-known Julia and Mandelbrot slices.

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

multirot-XZ-YW {; Jim Muth
; p1= 0,0=para, 90,0=obl, 0,90=elip, 90,90=rect
e=exp(flip(real(p1*.01745329251994))),
f=exp(flip(imag(p1*.01745329251994))),
z=f*real(pixel)+p2, c=e*imag(pixel)+p3:
z=sqr(z)+c,
|z| <= 36  }

multirot-XY-ZW {; draws 6 planes and many rotations
;when fn1-2=i,f, then p1 0,0=M, 0,90=O, 90,0=E, 90,90=J
;when fn1-2=f,i, then p1 0,0=M, 0,90=R, 90,0=P, 90,90=J
a=real(p1)*.01745329251994, b=imag(p1)*.01745329251994,
z=sin(b)*fn1(real(pixel))+sin(a)*fn2(imag(pixel))+p2,
c=cos(b)*real(pixel)+cos(a)*flip(imag(pixel))+p3:
z=sqr(z)+c,
|z| <= 36  }

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

Jim Muth
[e-mail]


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Date: Wed, 1 Dec 1999 07:34:32 EST
From: [e-mail]
Subject: Re: (fractint) Error message when starting FRACTINT...

Hi All,

I tried using Marcus' FRACTINT.CFG from version 20 and I still get the error
message that: File FRACTINT.CFG is missing or invalid.

- --Bob Carr--

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

Date: Wed, 1 Dec 1999 11:57:47 -0500
From: Bill Jemison <[e-mail]>
Subject: (fractint) Error message when starting FRACTINT...

Bob,

What happens after you get the message? If you hit <enter> does it contin=
ue
with default settings?

Make sure that the fractint.cfg is in the same directory as the version o=
f
Fractint that you are running. I know that this is not required, if thing=
s
are set up correctly, but it should work.

To get a DOS Box in Win9x <Start> <Programs> <MSDos Prompt> This will
probably give a full screen Dos prompt. If so, do an <Alt+Enter> which wi=
ll
give you a "DOS Box"

Bill

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Date: Wed, 1 Dec 1999 07:34:32 EST
From: [e-mail]
Subject: Re: (fractint) Error message when starting FRACTINT...

Hi All,

I tried using Marcus' FRACTINT.CFG from version 20 and I still get the error
message that: File FRACTINT.CFG is missing or invalid.

- --Bob Carr--

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

Date: Wed, 1 Dec 1999 21:52:22 EST
From: [e-mail]
Subject: Re: (fractint) Error message when starting FRACTINT...

Hi Tim,

Something new I came up with trying to solve my problem.

I made a Windows icon for DEMO-EV.BAT. When I click on the icon I get a DOS
Window. I entered the number <5>. Hit <enter> then hit <2>. This brought up
Parameter Set Selection screen. My selection was made and the image generated
just as before the problem.

Does this give you any ideas as to what is going on? Does this make any sense?

Regards,

- --Bob Carr--

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Date: Wed, 01 Dec 1999 19:15:10 -0800
From: "Angela Wilczynski" <[e-mail]>
Subject: Re: (fractint) Joining Fractint Discussion List

Noel...Time

Thanks very much....I remembered seeing instructions eons ago and I think this will
help the lady with the question.  I'll forward the information on to her.

wizzle

noel wrote:
>
>         The page at spanky describing how to join the
>         fractint listserver is at:
>
> http://spanky.triumf.ca/www/fractint/listserver.html
>
>         regards,
>         Noel

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Date: Thu, 2 Dec 1999 11:48:03 -0600
From: "Jon Meadows" <[e-mail]>
Subject: RE: (fractint) Fractal Creations 2nd Edition

> Actually my various books have been translated into quite a few
> languages. Off the top of my head Portuguese, Italian, German,
> and Spanish. but some of these were Image Lab rather than
> Fractal Creations. I'll have to look and see what I have.
>
> Tim

Thanks for all your work Tim.
It was crucial in helping me get where I am today.  8)

Payback time is just around the corner ;-)

Jon Meadows
Beyond VR
[e-mail]
=A0


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Date: Thu, 2 Dec 1999 15:29:42 -0500
From: Sylvie Gallet <[e-mail]>
Subject: (fractint) New galleries

Hi All,

  I have added two galleries to my web site, for a total of 21 new images=
.

  Check out galleries #17 and 18 at:

    <http://www.fractalus.com/sylvie/homepage.htm>

  Cheers,

        - Sylvie

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Date: Fri, 3 Dec 1999 19:53:37 -0500
From: John R Goering <[e-mail]>
Subject: Re: (fractint) Re: 2D slices of Julibrot

Hello to all,

Here is the mathematical derivation of the formula that I posted:

First, I created the following parameterization of a plane in pqrs-space:
  p=u,  q=v,  r=0, and s=0 (where the u-axis is the horizontal axis on
the screen and the v-axis is the vertical axis).

Then I did a sequence of counterclockwise rotations in the following
planes: qs-plane, qr-plane, pr-plane, pq-plane.  I performed these
rotations using the following general formula for performing a rotation
in some xy-plane by some angle t:

xnew=xold*cos(t) - yold*sin(t)
ynew=xold*sin(t) + yold*cos(t)

First, the rotation in the qs-plane (where a is the angle of rotation):

q=v*cos(a) - 0*sin(a)
s=v*sin(a) + 0*cos(a)

(Note that qold=v and sold=0 according to the first parameterization.
This rotation creates a new parameterization for q and s.)

So now the complete parameterization of the uv-plane in pqrs-space is:

p=u
q=v*cos(a)
r=0
s=v*sin(a)

Then the rotation in the qr-plane (where b is the angle of rotation and
where I substitute the "old" values for q and r from the above
parameterization into the rotation equations):

q=[v*cos(a)]*cos(b) - 0*sin(b)
r=[v*cos(a)]*sin(b) + 0*cos(b)

The new parameterization in pqrs-space then is:

p=u
q=v*cos(a)*cos(b)
r=v*cos(a)*sin(b)
s=v*sin(a)

Then the rotation in the pr-plane (where g is the angle of rotation [if
you wonder where this sequence of letters is from, I originally use the
first for letters of the Greek alphabet as the angles of rotation]):

p=u*cos(g) - [v*cos(a)*sin(b)]*sin(g)
r=u*sin(g) + [v*cos(a)*sin(b)]*cos(g)

So the new parameterization in pqrs-space is:

p=u*cos(g) - v*cos(a)*sin(b)*sin(g)
q=v*cos(a)*cos(b)
r=u*sin(g) + v*cos(a)*sin(b)*cos(g)
s=v*sin(a)

Then the rotation in the pq-plane (where d is the angle of rotation):

p=[u*cos(g) - v*cos(a)*sin(b)*sin(g)]*cos(d) - [v*cos(a)*cos(b)]*sin(d)
q=[u*cos(g) - v*cos(a)*sin(b)*sin(g)]*sin(d) + [v*cos(a)*cos(b)]*cos(d)

After some mathematical manipulations, the complete parameterization is:

p=u*cos(g)*cos(d) - v*[cos(a)*sin(b)*sin(g)*cos(d) +
cos(a)*cos(b)*sin(d)]
q=u*cos(g)*sin(d) + v*[cos(a)*cos(b)*cos(d) -
cos(a)*sin(b)*sin(g)*sin(d)]
r=u*sin(g) + v*cos(a)*sin(b)*cos(g)
s=v*sin(a)

Then I performed a simple shift of the origin of the uv-plane to the
point (real(p3), imag(p3), 0 ,0).  This point is in the pq-plane ( the
plane that the M-set is in).  So, theoretically, the resulting
parameterizations of p and q are:

p=u*cos(g)*cos(d) - v*[cos(a)*sin(b)*sin(g)*cos(d) +
cos(a)*cos(b)*sin(d)] + real(p3)
q=u*cos(g)*sin(d) + v*[cos(a)*cos(b)*cos(d) -
cos(a)*sin(b)*sin(g)*sin(d)] + imag(p3)

However, to simplify things, I did not really add real(p3) and imag(p3)
in the formula until I initialized the value of c

So in implementing the parameterization, I initially set z = r + s*i and
c = p + q*i + p3 (where p3 is the third parameter. Note that this adds
the real portion of p3 to p and the imaginary portion of p3 to q.)

I included the formula below so that you can compare the parameterization
with how I wrote it in the actual code.

SliceJB {; by John R. H. Goering, July 1999
;This formula produces 2D slices of the 4D Julibrot set. The numbers for
;p1 and p2 describe the rotation of the plane that slices the set (I
;call that plane the uv-plane -- the u-axis is the horizontal axis on
;the screen and the v-axis is the vertical axis). I call the 4 axes
;in 4-space the p, q, r, & s axes. The M-set is in the pq-plane and the
;J-sets are in the rs-plane and planes "parallel" to it. The rotation
angles
;are to be entered as fractions of pi (e.g., pi/4 would be entered as
0.25).
;At first, the uv-plane is identical to the pq-plane.
;Then the rotations are performed counterclockwise in each plane as
follows:
;First: real(p1)--the rotation in the qs-plane.  Then imag(p1)--qr-plane.
;real(p2)--pr-plane. imag(p2)--pq-plane.
;The origin of the resulting skewed uv-plane is then placed at the point
;(real(p3), imag(p3), 0, 0) in pqrs-space. To create the M-set, leave the
;parameters alone, or you may change p3 to change the position of the
M-set
;on the uv-plane.
;To create a J-set, set real(p1)=real(p2)=0.5, then set p3 equal to the
;constant for the J-set (let imag(p1)=imag(p2)=0).
;The parameters for p1 and p2 that are needed to put the uv-plane
parallel to
;the various coordinate planes are as following (the numbers are given in
the
;order -- real(p1), imag(p1), real(p2), imag(p2) ):
;pq-plane: 0, 0, 0, 0   pr-plane: 0, 0.5, 0, 0   ps-plane: 0.5, 0, 0, 0
;qr: 0, 0.5, 0, 0.5  qs: 0.5, 0, 0, 0.5  rs: 0.5, 0, 0.5, 0

  pix=pixel, u=real(pix), v=imag(pix), a=pi*real(p1), b=pi*imag(p1)
  g=pi*real(p2), d=pi*imag(p2), ca=cos(a), cb=cos(b), sb=sin(b),
cg=cos(g)
  sg=sin(g), cd=cos(d), sd=sin(d)
  p=u*cg*cd-v*(ca*sb*sg*cd+ca*cb*sd)
  q=u*cg*sd+v*(ca*cb*cd-ca*sb*sg*sd)
  r=u*sg+v*ca*sb*cg, s=v*sin(a), c=p+flip(q) + p3, z=r+flip(s):
  z=z*z+c
  |z|<=4
}


- -------------------------------------
John Ralph H. Goering
[e-mail]
- -------------------------------------
"Let us fix our eyes on Jesus, the author and perfecter of our faith."
(Heb. 12:2a NIV)

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Date: Sun, 05 Dec 1999 15:50:10 -0600
From: Tim Wegner <[e-mail]>
Subject: Re: (fractint) Parser bug

Nearly a month ago, I wrote and Sylvie responded:

> >> Are there any other parser bugs anyone knows of that were  introduced in
> >> V. 20?
>
>   No, but I have the same problem with Kerry's starnear_jul formula.

We now believe that we have found and fixed this problem. Chuck
Ebbert's formula optimizer works OK but has a side effect that
makes problems with the decomp option. The star_near example
we had that showed the bug uses decomp=256. My earlier fix was
to undo Chuck's optimization, but we believe we can fix the
problem and keep most of the improvement. The formula parser
should work OK with no decomp, and if you are using decomp and
see a bug, adding debug=90 to the command line clears it up (at
the expense of speed.)

We have also fixed the 3D targa problem that was mentioned here.
For these reasons and because my email has changed, we will be
releasing 20.1 before to long, but knowing how things go, probably
after the holidays.

Tim




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Date: Wed, 8 Dec 1999 01:43:44 -0700
From: "Andrew Coppin" <[e-mail]>
Subject: (fractint) Date: Wed, 08 Dec 1999 08:43:39 GMT

Could someone please explane to me how Fractint's Esher Julia type works? I
gathered that it renders the normal level sets of the quadratic Julia Z =
sqr(Z), and it uses as the bailout test the shape of another user-selectable
Julia set. But why don't the numbers I type produce the Julia shapes I'm
expecting?

Is there any way to inplement this type as an FRM? If so, can someone show
me one where *both* Julias have a user-selectable parameter?

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Date: Wed, 8 Dec 1999 16:32:31 -0600
From: "Jon Meadows" <[e-mail]>
Subject: (fractint) 3D gallery of Fractal '99 Contest

This is a multi-part message in MIME format.

- ------=_NextPart_000_0001_01BF419B.24C834A0
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    charset="iso-8859-1"
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I've put all the winners into a VRspace (VRML) that everyone can enter and
explore. We're putting in the tours now, and next we'll e-commerce enable
the site. It will also be multiuser enabled, allowing us to meet and chat
there.

The big gallery is four stories tall and not only contains the winners of
the Fractal '99 Contest but the majority of the entries as well. There is
also a building that is for the display of more fractals, and another
building that will be dedicated to a featured artist. WE WANT YOUR FEEDBACK.
The pieces that go in these buildings are to be determined by the fractal
community. We intend to swap out the pieces in the "artist gallery" and the
"featured artist gallery" on a regular basis. Sylvie is who I've put in as
the featured artist to begin with.

So PLEASE go check out www.metaverse-portal.com and let me know what you
think and if you run into any difficulties.  There's also some screen shots
of what the place looks like.

Beyond VR
Jon Meadows
[e-mail]


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<P>I've put all the winners into a VRspace (VRML) that everyone can =
enter and=20
explore. W</FONT><FONT face=3DArial size=3D2>e're putting in the tours =
now, and next=20
we'll e-commerce enable the site. It will also be multiuser enabled, =
allowing us=20
to meet and chat there.</P>
<P>The big gallery is four stories tall and not only contains the =
winners of the=20
Fractal '99 Contest but the majority of the entries as well. There is =
also a=20
building that is for the display of more fractals, and another building =
that=20
will be dedicated to a featured artist. </FONT><FONT face=3DArial =
size=3D2>WE WANT=20
YOUR FEEDBACK. </FONT><FONT face=3DArial size=3D2>The pieces that go in =
these=20
buildings are to be determined by the fractal community. We intend to =
swap out=20
the pieces in the "artist gallery" and the "featured =
artist=20
gallery" on a regular basis. Sylvie is who I've put in as the =
featured=20
artist to begin with.</P>
<DIV><FONT color=3D#000000>So PLEASE go check out =
www.metaverse-portal.com and let=20
me know what you think and if you run into any difficulties.<SPAN=20
class=3D30275121-08121999><FONT color=3D#000000 face=3DArial =
size=3D2>  There's=20
also some screen shots of what the place looks=20
like.</FONT></SPAN></FONT></FONT></DIV></DIV>
<DIV> </DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>Beyond VR</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>Jon =
Meadows</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2><A=20
href=3D"mailto:[e-mail]">[e-mail]</A></FO=
NT></DIV>
<DIV> </DIV></BODY></HTML>

- ------=_NextPart_000_0001_01BF419B.24C834A0--


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Date: Thu, 09 Dec 1999 04:17:34 -0600
From: Bob Margolis <[e-mail]>
Subject: Re: (fractint) Fractal Creations 2nd Edition

Hello FractIntizens:

Sorry for replying to this question posed to the mail list on Nov. 8, but I was
on vacation in Kenya and Tanzania and had to leave my computer at home. (There
was absolutely no room for it in the Land Rover <g>.)

Fortunately I am the proud owner of not only the second edition of Fractal
Creations, but the first edition as well! Nyaah. Nyaah.

Anyway, I didn't see a reply within the past month to the following question,
and so I give a response based upon books that I own.

Alejandro Gustavo Kainer wrote:
>
>
> Btw, what are your other books about? Photography? What are their names?
>
> Thank you for answering :))
>
> @le
>

Besides two editions of Fractal Creations, I own the following books from Waite
Group Press:

Animation How-To CD by Jeff Bowermaster. 1994
Image Lab (2nd ed.) by our magnamimous and supremely wise leader, Tim Wegner.
1995
Artifical Life Lab by Rudy Rucker. 1993
Making Movies on Your PC by David K. Mason and Alexander Enzmann. 1993
Ray Tracing Creations (2nd ed.) by Chris Young and Drew Wells. 1994
Virtual Reality Creations by Dave Stampe, Bernie Roehl, and John Eagan. 1993
Virtual Reality Playhouse by Nicholas Lavroff. 1992

The Image Lab book mentioned above came with a CD that had several image
processing programs on it, including the version of FractInt current at the
time, POV-Ray, Polyray, Piclab, Image Alchemy and Dave's Targa Animator. The
book says that our fearless and devoted leader authored five computer graphics
books published in three languages, including the two editions of Fractal
Creations.

When the book was published, "Tim's idea of a good time," the book says, "is to
curl up in a rocking chair with a good mathematics book, and then spend half
the night in front of his computer transforming abstract ideas into colorful
new Fractint features," when he should have instead been practicing his dunking
basketballs through the hoop so that he would not have been "playing a hopeless
game of one-on-one basketball with his teenage son."

HAND,

Bob Margolis
[e-mail]

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End of fractint-digest V1 #427
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