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fractint-digest        Wednesday, May 27 1998        Volume 01 : Number 222




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

Date: Tue, 26 May 1998 07:48:22 -0700
From: "Mike and Linda Allison" <[e-mail]>
Subject: Re: (fractint) Problem with DOS/Fractint - Help!

My thanks to all of you for your suggestions.  I'll give them a try and
let you know how it goes!

Linda



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Date: Tue, 26 May 1998 09:57:34 -0400 (EDT)
From: [e-mail] (Kragen)
Subject: (fractint) lsystems

I haven't played with lsystems for a long time; now I'm going to write a quick
one-off lsystem engine.  I'd like it to be able to read fractint l-systems.

I have some questions -- user-type questions, that should maybe be kept
in the manual, things I will answer myself through experimentation:
- - Do both direction pointers start pointing to the right?
- - If I understand correctly, \ and / move a direction pointer that controls
  the direction of D and M -- right?  And D and M use the same current-point
  that F and G do, right?
- - All the numbers are delimited by having non-numeric material follow, right?
- - Which way does | turn if the angle is odd?  Left or right?
- - "Increase" and "Decrease" angle mean "turn left" and "turn right", right?
- - What exactly do [ and ] save and restore?  I know they save the current
  +-FG state, the current position, and the current @ scale; do they also
  save the current \/DM state, the current ! state, and the current color?

These can be determined by experimentation.  These others would be more
difficult:
- - Does the grammar require that the { fall on the same line as the lsystem
name?
- - Is everything case-insensitive?
- - Are the ", sequences in FlowSnake accidental, or do they have meaning I do
  not comprehend?
- - Is it legal to include the Penrose tiles?  Penrose recently sued a
  toilet-paper company for printing the Penrose tiles on their toilet
  paper.

Kragen


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Date: Tue, 26 May 1998 19:21:37 EDT
From: SKarl52884 <[e-mail]>
Subject: Re: (fractint) Color Update

In a message dated 98-05-26 16:53:55 EDT, you write:

<< http://wizzle.simplenet.com/fractals/fractalintro.htm

 Angela aka wizzle
  >>
Thanks Angela,
I'm looking foreward to exploring more of your wonderfull maps.
Steve

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Date: Tue, 26 May 1998 08:43:49 -0400
From: "RJ Corradino" <[e-mail]>
Subject: RE: (fractint)newbe needs video mode

Your welcome.  If that doesn't work, I think there used to be a program
called Display Doctor that fixed a lot of problems like this for me.
Unfortunately, it also conflicted with my sound card, so I no longer use it.
I don't remember where I downloaded it from(I dunno if it even exists
anymore).  Search for it on the web- it was shareware w/ a 30 day trial so
if it doesn't fix it, you don't pay anything.

- -Good luck

> -----Original Message-----
> From: [e-mail]
> [mailto:[e-mail]]On Behalf Of Colleen Johnson
> Sent: Thursday, May 21, 1998 9:43 PM
> To: [e-mail]
> Subject: Re: (fractint)newbe needs video mode
>
>
> Hi RJ
> I have a floppy disk with the most recent drivers from the
> manufacturer's home page.  I'm going to have my hubbie look over
> the files and see if there's a DOS driver in there that might
> make a difference.  But the modes don't work in Windows either.
> There are a couple of other drivers or programs that came with
> the video card that aren't installed on the computer that I'm
> going to ask him to install and see if that helps.
> Thanks!
> Colleen
>
>
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> Unsubscribe:    [e-mail] "unsubscribe fractint"
>


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Date: Tue, 26 May 1998 19:49:13 EDT
From: SKarl52884 <[e-mail]>
Subject: (fractint)Legal Limit for par entries

Greetings,

   Is there a limit to the number of entries fractint will recognize in a par
file?

   Now that I'm seeing maps stored in par files { Angela ... so cool!   its a
faster load and a faster browse for sure } I'm wondering... how many will fit
in one par?
Thanks,   Any and all input welcome.
Steve

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Date: Tue, 26 May 1998 17:29:25 -0700
From: "Angela Wilczynski" <[e-mail]>
Subject: Re: (fractint) Color Update

Did someone say colormaps?? <<perk>>

Linda offered to let me grab some of her new maps to post at my website.  Now
that's an offer I can't refuse!!

And I'd also love to do another set of everyone's favorite maps, now that I've
learned to "par" the maps. Personally I mostly use .map files......and if you
have any you'd like to share, please send them to me direct at

[e-mail]

Identifying your newest maps with your name, i.e. wiza001.map....wiza002.map
saves me the hastle of re-naming them.  But any naming convention is fine as
long as it doesn't duplicate what is already posted. ((thanks))

Angela

SKarl52884 wrote:
>
> In a message dated 98-05-26 16:53:55 EDT, you write:
>
> << http://wizzle.simplenet.com/fractals/fractalintro.htm
>
>  Angela aka wizzle
>   >>
> Thanks Angela,
> I'm looking foreward to exploring more of your wonderfull maps.
> Steve

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Date: Tue, 26 May 1998 19:19:01 -0500 (CDT)
From: [e-mail] (Paul and/or Joyce Carlson)
Subject: (fractint) Extended TripleMutant Formula

comment {
These two formulas are modifications of Oliver Klimek's
TripleMutant formula.  I wrote these modifications because
I thought the basic concept Oliver came up with was very
interesting but the resulting images didn't tell me enough
about the dynamics of the iteration and I wanted to get some
idea of the relative contribution that each of the functions
was making to the initial and final value of z.

This is just my first cut at extending Oliver's idea and I'm
sure that somebody (like Sylvie) can improve upon it.  Anyhow,
this is what I've done in these two formulas:

The fn1 function is represented by the color red.
The fn2 function is represented by the color green.
The fn3 function is represented by the color blue.
I'll call the contributions that these functions make c1,
c2 and c3.

If c1 is the largest of the three:
   The color of the pixel will be in the range of magenta to
   yellow, with red in the center.  If c2 > c3 the color will
   be shifted towards yellow; if c3 > c2 the color will be
   shifted towards magenta.
If c2 is the largest of the three:
   The color of the pixel will be in the range of yellow to
   cyan, with green in the center.  If c1 > c3 the color will
   be shifted towards yellow; if c3 > c1 the color will be
   shifted towards cyan.
If c3 is the largest of the three:
   The color of the pixel will be in the range of cyan to
   magenta, with blue in the center.  If c2 > c1 the color will
   be shifted towards cyan; if c1 > c2 the color will be
   shifted towards magenta.

Although the images won't tell you anything exact about any
particular pixel, you can learn quite a bit how things change
from pixel to pixel.  Suppose, for example, that a pixel is
red-orange.  This tells you that c1 is largest, c2 the next
largest and c3 the smallest.  If the pixel adjacent to this
pixel is orange-yellow, it tells you that c2 has increased
from the first pixel to the second.

The Mutant_Start formula shows the relative contributions at
the begining of the iteration.  The coloring of the images
that use this formula tend to be somewhat predictable.  The
Mutant_End formula shows the relative contributions at bailout
which tend to be much more interesting.  All of the pars use
Oliver's original parameters and functions, except for
Mut_end_02_zoom.  The image created by this par shows that
the patterns created by the areas of influence of the three
functions exhibit a high degree of self-similarity.  This is
also the best-looking image from an artistic standpoint.  In
all the pars except this one I've reduced maxiter from 1500
to 500 for speed.

Anyhow, this is a great idea you had, Oliver, and one that
deserves to be expanded upon much more than I've done so far.

Paul Carlson
}

frm:Mutant_Start { ; Oliver Klimek's TripleMutant formula
           ; as modified by Paul Carlson, 1998
    w = z = bailout = iter = 0
    c = pixel
    a1 = 1 / (|(pixel - p1)|^2)
    a2 = 1 / (|(pixel - p2)|^2)
    a3 = 1 / (|(pixel - p3)|^2)
    ;
    ; find contribution of each function
    k1 = a1 * fn1(w)
    k2 = a2 * fn2(w)
    k3 = a3 * fn3(w)
    ;
    ; find which function has largest contribution
    m1 = cabs(k1), m2 = cabs(k2), m3 = cabs(k3)
    IF (m1 < 1.0e-20)
        m1 = 1.0e-20
    ENDIF
    IF (m2 < 1.0e-20)
        m2 = 1.0e-20
    ENDIF
    IF (m3 < 1.0e-20)
        m3 = 1.0e-20
    ENDIF
    maxm = m1
    IF (m2 > m1)
        maxm = m2
        IF (m3 > m2)
            maxm = m3
        ENDIF
    ELSEIF (m3 > m1)
        maxm = m3
    ENDIF
    :
    ; compute value of w
    w = w * w + c + k1 + k2 + k3
    ;
    ; test for bailout
    IF (|w| > 8)
        bailout = 1
        ;
        ; set z to colormap index
        IF (maxm == m1)
            z =   1 + 40 * (1 - m3/m1 + m2/m1)
        ELSEIF (maxm == m2)
            z =  81 + 40 * (1 - m1/m2 + m3/m2)
        ELSE
            z = 161 + 40 * (1 - m2/m3 + m1/m3)
        ENDIF
    ENDIF
    iter = iter + 1
    z = z - iter
    bailout == 0
}

frm:Mutant_End { ; Oliver Klimek's TripleMutant formula
                 ; as modified by Paul Carlson, 1998
    w = z = bailout = iter = 0
    c = pixel
    a1 = 1 / (|(pixel - p1)|^2)
    a2 = 1 / (|(pixel - p2)|^2)
    a3 = 1 / (|(pixel - p3)|^2)
    :
    ; find contribution of each function
    k1 = a1 * fn1(w)
    k2 = a2 * fn2(w)
    k3 = a3 * fn3(w)
    ;
    ; compute value of w
    w = w * w + c + k1 + k2 + k3
    ;
    ; test for bailout
    IF (|w| > 8)
        bailout = 1
        ;
        ; find which function has largest contribution
        m1 = cabs(k1), m2 = cabs(k2), m3 = cabs(k3)
        IF (m1 < 1.0e-20)
            m1 = 1.0e-20
        ENDIF
        IF (m2 < 1.0e-20)
            m2 = 1.0e-20
        ENDIF
        IF (m3 < 1.0e-20)
            m3 = 1.0e-20
        ENDIF
        maxm = m1
        IF (m2 > m1)
            maxm = m2
            IF (m3 > m2)
                maxm = m3
            ENDIF
        ELSEIF (m3 > m1)
            maxm = m3
        ENDIF
        ;
        ; set z to colormap index
        IF (maxm == m1)
            z =   1 + 40 * (1 - m3/m1 + m2/m1)
        ELSEIF (maxm == m2)
            z =  81 + 40 * (1 - m1/m2 + m3/m2)
        ELSE
            z = 161 + 40 * (1 - m2/m3 + m1/m3)
        ENDIF
    ENDIF
    iter = iter + 1
    z = z - iter
    bailout == 0
}


Mut_start_01    { ; The points are far away
  reset=1960 type=formula formulafile=pcmut.frm
  formulaname=mutant_start
  function=sqrt/cos/acosh
  center-mag=-0.604272/-0.00330507/0.7535615
  params=10/10/-10/10/10/-10
  float=y maxiter=500 inside=253 outside=summ
  colors=000z0f<37>z7Az79z88z98<36>zx1zz0yz0<38>2zQ0zR0zR<36>\
  0zy0zz0yz0xz<36>FIzGGzHGz<38>x1g000<13>000
  }

Mut_end_01    { ; The points are far away
  reset=1960 type=formula formulafile=pcmut.frm
  formulaname=mutant_end
  function=sqrt/cos/acosh
  center-mag=-0.604272/-0.00330507/0.7535615
  params=10/10/-10/10/10/-10
  float=y maxiter=500 inside=253 outside=summ
  colors=000z0f<37>z7Az79z88z98<36>zx1zz0yz0<38>2zQ0zR0zR<36>\
  0zy0zz0yz0xz<36>FIzGGzHGz<38>x1g000<13>000
  }

Mut_start_02    { ; The points are moving closer
  reset=1960 type=formula formulafile=pcmut.frm
  formulaname=mutant_start
  function=sqrt/cos/acosh
  center-mag=-0.604272/-0.00330507/0.7535615
  params=2.5/2.5/-2.5/2.5/2.5/-2.5
  float=y maxiter=500 inside=253 outside=summ
  colors=000z0f<37>z7Az79z88z98<36>zx1zz0yz0<38>2zQ0zR0zR<36>\
  0zy0zz0yz0xz<36>FIzGGzHGz<38>x1g000<13>000
  }

Mut_end_02    { ; The points are moving closer
  reset=1960 type=formula formulafile=pcmut.frm
  formulaname=mutant_end
  function=sqrt/cos/acosh
  center-mag=-0.604272/-0.00330507/0.7535615
  params=2.5/2.5/-2.5/2.5/2.5/-2.5
  float=y maxiter=500 inside=253 outside=summ
  colors=000z0f<37>z7Az79z88z98<36>zx1zz0yz0<38>2zQ0zR0zR<36>\
  0zy0zz0yz0xz<36>FIzGGzHGz<38>x1g000<13>000
  }

Mut_end_02_zoom         { ; zoom into Mut_end_02
  reset=1960 type=formula formulafile=pcmut.frm
  formulaname=mutant_end
  function=sqrt/cos/acosh
  center-mag=+0.31940862426200290/+0.03514300035272705/176.0658
  params=2.5/2.5/-2.5/2.5/2.5/-2.5
  float=y maxiter=1500 inside=253 outside=summ
  colors=000z0f<37>z7Az79z88z98<34>zu1zw1zx1zz0yz0wz1<37>2zQ0z\
  R0zR<36>0zy0zz0yz0xz<36>FIzGGzHGz<38>x1g000<13>000
  }

Mut_start_03    { ; They're almost there !
  reset=1960 type=formula formulafile=pcmut.frm
  formulaname=mutant_start
  function=sqrt/cos/acosh
  center-mag=-1.20921/0.115591/0.4825573
  params=1/1/-1/1/1/-1
  float=y maxiter=500 inside=253 outside=summ
  colors=000z0f<37>z7Az79z88z98<36>zx1zz0yz0<38>2zQ0zR0zR<36>\
  0zy0zz0yz0xz<36>FIzGGzHGz<38>x1g000<13>000
  }

Mut_end_03    { ; They're almost there !
  reset=1960 type=formula formulafile=pcmut.frm
  formulaname=mutant_end
  function=sqrt/cos/acosh
  center-mag=-1.20921/0.115591/0.4825573
  params=1/1/-1/1/1/-1
  float=y maxiter=500 inside=253 outside=summ
  colors=000z0f<37>z7Az79z88z98<36>zx1zz0yz0<38>2zQ0zR0zR<36>\
  0zy0zz0yz0xz<36>FIzGGzHGz<38>x1g000<13>000
  }

Mut_start_04    { ; Now this an interesting tip
  reset=1960 type=formula formulafile=pcmut.frm
  formulaname=mutant_start
  function=asin/sqr/asinh
  center-mag=-1.632/-0.00507455/3.637199
  params=1/1/0.7/1/1/0.2
  float=y maxiter=500 inside=253 outside=summ
  colors=000z0f<37>z7Az79z88z98<36>zx1zz0yz0<38>2zQ0zR0zR<36>\
  0zy0zz0yz0xz<36>FIzGGzHGz<38>x1g000<13>000
  }

Mut_end_04    { ; Now this an interesting tip
  reset=1960 type=formula formulafile=pcmut.frm
  formulaname=mutant_end
  function=asin/sqr/asinh
  center-mag=-1.632/-0.00507455/3.637199
  params=1/1/0.7/1/1/0.2
  float=y maxiter=500 inside=253 outside=summ
  colors=000z0f<37>z7Az79z88z98<36>zx1zz0yz0<38>2zQ0zR0zR<36>\
  0zy0zz0yz0xz<36>FIzGGzHGz<38>x1g000<13>000
  }


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Date: Tue, 26 May 1998 09:05:34 EDT
From: Mars Magus <[e-mail]>
Subject: Re: (fractint) In Memoriam 486

okay.. I wanted to avoid getting into this, but the morning waking can do odd
things to thought processes...

just how many sides did those dice have, I wonder?
...or perhaps in how many dimensions? <eg>

Doh. :)
   Chris
(what were they _made_ of, since there was no firmament? Plastics are still
several thousand years away at that point!)

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Date: Tue, 26 May 1998 19:19:56 -0500
From: [e-mail] (exile)
Subject: Re: (fractint) L-Systems

} From: "Damien M. Jones" <[e-mail]>
} Kragen,
}
}  - Does anyone have suggestions about what vector formats would be more
}  - widely readable by Win95 users?
}
} Windows metafile (.WMF).  Not sure where you can find out how to create
} such a file without the Windows API, though.

 My experience with .WMF has been pretty awful... maybe .ai?

 {}Rick
 __

 Please...
 Don't hate me because I'm beautiful.    {Kelly LeBrock}


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Date: Tue, 26 May 1998 21:40:39 -0400
From: "Jason Hine" <[e-mail]>
Subject: Re: (fractint) In Memoriam 486

In the morning Mars mused:

>just how many sides did those dice have, I wonder?
>...or perhaps in how many dimensions? <eg>

Well, if God is a perfect fractal, perhaps they were fractal dice. Such dice
would have an infinite number of sides, though not each side would have to be
the same size.  This would make certain rolls more likely, though the chance of
any particular roll occurring would always be 1 to infinity!

>   Chris corresponded:
>(what were they _made_ of, since there was no firmament? Plastics are still
>several thousand years away at that point!)

Well, when you turn Godel's Theorem inside out and find it's negative square
root, you get a recipie for these confectionary dice... they're quite heavenly,
actually.

Please direct flames to me personally, thanks!  :)  Jason


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Date: Tue, 26 May 1998 22:12:51 -0400
From: "Peter Gavin" <[e-mail]>
Subject: (fractint) FRMs & PARs

This is a multi-part message in MIME format.

- ------=_NextPart_000_0001_01BD88F3.6D07CC60
Content-Type: text/plain;
    charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Is there a way to tell Fractint to look in multiple directories for =
frm/par files?  I keep mine sorted in directories, and every time I load =
a par in need of a formula, it complains.  I have a line in my =
sstools.ini file for one directory, but I want to search multiple, so =
can I make a list, with semicolons, or something like that?

Thanks

Peter Gavin
<[e-mail]>

// End transmission


- ------=_NextPart_000_0001_01BD88F3.6D07CC60
Content-Type: text/html;
    charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
<HTML>
<HEAD>

<META content=3D"text/html; charset=3Diso-8859-1" =
http-equiv=3DContent-Type>
<META content=3D'"MSHTML 4.72.2106.6"' name=3DGENERATOR>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><SPAN class=3D160010902-27051998><FONT color=3D#000000 =
face=3DVerdana size=3D2>Is=20
there a way to tell Fractint to look in multiple directories for frm/par =

files?  I keep mine sorted in directories, and every time I load a =
par in=20
need of a formula, it complains.  I have a line in my sstools.ini =
file for=20
one directory, but I want to search multiple, so can I make a list, with =

semicolons, or something like that?</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV><SPAN class=3D160010902-27051998><FONT color=3D#000000 =
face=3DVerdana=20
size=3D2>Thanks</FONT></SPAN></DIV>
<DIV><SPAN class=3D160010902-27051998><FONT color=3D#000000 =
face=3DVerdana=20
size=3D2></FONT></SPAN><FONT face=3D"" size=3D2><BR>Peter =
Gavin<BR><<A=20
href=3D"mailto:[e-mail]">[e-mail]</A>><BR><B=
R><EM><FONT=20
face=3D"" size=3D1>// End transmission</FONT></EM></FONT></DIV>
<DIV> </DIV></BODY></HTML>

- ------=_NextPart_000_0001_01BD88F3.6D07CC60--


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Date: Tue, 26 May 1998 22:14:34 -0500
From: "Damien M. Jones" <[e-mail]>
Subject: Re: (fractint) L-Systems

Rick,

 - My experience with .WMF has been pretty awful... maybe .ai?

.AI (Adobe Illustrator) is only readable by higher-end apps.  It was my
understanding (I could easily be wrong here) that it's basically a form of
PostScript, i.e. an EPS (Encapsulated PostScript) file.

WMF is decent for very simple vector stuff, but not for anything terribly
fancy.  I don't think L-systems will get that fancy.  WMF may suck in
general, but I'd suspect it can be read by more software than AI, and
that's what Kragen asked for.

Damien M. Jones   \\
[e-mail]  \\  http://www.icd.com/tsd/ (temporary sanity designs)
                    \\  http://www.fractalus.com/ (fractals are my hobby)

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Date: Tue, 26 May 1998 21:35:43 -0500
From: "Paul N. Lee" <[e-mail]>
Subject: Re: (fractint) L-Systems

Damien M. Jones wrote:
>
> Kragen wrote:
> >
> > Does anyone have suggestions about what vector formats
> > would be more widely readable by Win95 users?
>
> Windows metafile (.WMF).  Not sure where you can find out
> how to create such a file without the Windows API, though.
>

One of the best references on file formats for images is:

   Encyclopedia of Graphics File Formats, 2nd edition
   by James D. Murray and William vanRyper
   O'Reilly & Associates, Inc. -- ISBN: 1-56592-161-5
   http://www.ora.com/

There are detailed descriptions on every byte of various record formats.

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Date: Tue, 26 May 1998 22:27:30 -0500
From: Kivryn_H <[e-mail]>
Subject: (fractint) Printing documentation

Hi all,

I hope someone will not mind sending me a quick e-mail to answer my
question.  I get the digest and wouldn't mind getting the answer tonight
so I can start printing.  My question, how can I print the documentation
out for Fractint?  I don't see a doc. file.  Thanks for helping.

Kivryn

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Date: Tue, 26 May 1998 23:26:46 -0600
From: "Tim Wegner" <[e-mail]>
Subject: (fractint) New fractal coloring option?

I would be interested to know if anyone can duplicate the images at

http://homepages.strath.ac.uk/~nau96158/

using Fractint's formula parser. Also the pseudocode looks strange to me.
Does colour need to be calculated inside the loop?

Is this sufficiently different to deserve being added to fractint?

Tim


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Date: Tue, 26 May 1998 23:30:41 -0500
From: "Paul N. Lee" <[e-mail]>
Subject: Re: (fractint) Printing documentation

Kivryn_H wrote:
>
> I hope someone will not mind sending me a quick e-mail to answer
> my question.  I get the digest and wouldn't mind getting the
> answer tonight so I can start printing.  My question, how can I
> print the documentation out for Fractint?  I don't see a doc. file.
>

 As of version 16.0, all Fractint documentation is available online.
 Run Fractint and press F1 for the main help index.

 If you want a full documentation file (nicely formatted with table
 of contents and cross-references by page number), you can easily
 create one.
 For the MS-DOS version, type the following command at the DOS prompt:
       fractint makedoc
 The above command will overwrite the file you are now reading
 (fractint.doc) with the full Fractint documentation.

 For the Unix version, type:
     make doc


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- -------------------------------------------------
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Date: Wed, 27 May 1998 00:36:37 EDT
From: Mars Magus <[e-mail]>
Subject: Re: (fractint) L-Systems

There's also a thought here that as long as you're doing vector formats, and
especially concerning 95 and up, why aren't we dealing with err, the bitmap of
vectors.. .DXF. You can slice (decompile) a lot of design programs to get a
DXF parser, the output, of course, will vary by program... However, it can be
ported a *lot* of different ways from there. (Yeah, originally I'm a drafter,
sue me :)

Anything on that orbit plotting thing? Paul? :)

man I wish I had something cool to post. ::praying to the Goddess that Gives
Us Gigabytes::

Chris

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Date: Tue, 26 May 1998 22:53:09 -0700 (MST)
From: Kerry Mitchell <[e-mail]>
Subject: Re: (fractint) New fractal coloring option?

Tim,

These images look like some stuff that was posted before, by (engage brain
failure--my apologies), and I did some modifications.  I haven't tried
Iain's code, but it looks something like this:

pseudo-iain { ; use decomp=256
zc=pixel, c=p1, bailout=real(p2), range=imag(p2), iter=1:
iter=iter+1, zc=sqr(zc)+c, test=fn1(zc)
if(test<range)
  t=test/range*twopi
  end if
if((|zc|>bailout)||(iter==maxit))
  iter=-1
  z=cos(t)+flip(sin(t))
  end if
iter>0
}

- -------------------------------------------------------------------------------
Kerry Mitchell
[e-mail]
- -------------------------------------------------------------------------------

On Tue, 26 May 1998, Tim Wegner wrote:

> I would be interested to know if anyone can duplicate the images at
>
> http://homepages.strath.ac.uk/~nau96158/
>
> using Fractint's formula parser. Also the pseudocode looks strange to me.
> Does colour need to be calculated inside the loop?
>
> Is this sufficiently different to deserve being added to fractint?
>
> Tim
>
>
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> Post Message:   [e-mail]
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> Unsubscribe:    [e-mail] "unsubscribe fractint"
>


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Date: Tue, 26 May 1998 23:36:00 -0500
From: "Earl Simpson" <[e-mail]>
Subject: Re: (fractint) Printing documentation

- -----Original Message-----
From: Kivryn_H <[e-mail]>
To: [e-mail] <[e-mail]>
Date: Tuesday, May 26, 1998 10:54 PM
Subject: (fractint) Printing documentation


>Hi all,
>
>I hope someone will not mind sending me a quick e-mail to answer my
>question.  I get the digest and wouldn't mind getting the answer tonight
>so I can start printing.  My question, how can I print the documentation
>out for Fractint?  I don't see a doc. file.  Thanks for helping.
>
>Kivryn
>
Kivryn,

Open Fractint, hit the F1 key twice.  This should get you to the Main Help
File.  At the bottom of the right hand column is a reference to
documentation.  Highlight it and hit enter which will bring up another
screen about documentation.  Toward the bottom, the question is ask,
"Generate Fractint Doc now?"   I believe the answer here is obvious.

Hope this answers your question.

Earl Simpson


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Date: Wed, 27 May 1998 01:45:50 -0500 (CDT)
From: [e-mail] (Paul and/or Joyce Carlson)
Subject: (fractint) Re: New fractal coloring option?

I apologize if this ends up on the list twice, but the first time I
sent it I noticed just as I sent it that the address was different.

Tim,

>I would be interested to know if anyone can duplicate the images at
>
>http://homepages.strath.ac.uk/~nau96158/
>
>using Fractint's formula parser.

Image one looks like it was done with my Bubbles rendering method.
Image two looks like it was done with my 3D Stalks rendering method.
Both of these methods (and many more) I've implemented with Fractint
formulas.

>Also the pseudocode looks strange to me.

Me too.  It's not very good pseudocode.

>Does colour need to be calculated inside the loop?

Yes, but only once, using a bailout test inside the loop.  Here is
my Bubbles formula and a couple of pars:

frm:Bubbles_Julia_Mset {; Copyright (c) Paul W. Carlson, 1998
    ;****************************************************
    ; Always use floating point math and outside=summ.
    ;
    ; Parameters:
    ;
    ;   p1       = if both real(p1) and imag(p1) are zero
    ;              do Mset, otherwise do Julia set.
    ;   real(p2) = maximum contour of minimum sqrt(|w|)
    ;              (this is the outside edge of the bubbles).
    ;   imag(p2) = Value of |w| at bailout.
    ;   real(p3) = number of color ranges.
    ;   imag(p3) = number of colors in each color range.
    ;
    ; Note that the equation variable is w, not z.  Always
    ; initialize z to zero.
    ;****************************************************
    IF (real(p1) == 0 && imag(p1) == 0)
    w = 0
    c = pixel
    ELSE
    w = pixel
    c = p1
    ENDIF
    z = 0
    bailout = 0
    iter = 0
    range_num = 0
    max_w = imag(p2)
    ;****************************************************
    ; In the accompanying par files, bubsjul1 and 2.par,
    ; we have 2 color ranges with 125 colors in each range
    ; for a total of 250 colors. The first range starts at
    ; color 1.
    ;****************************************************
    num_ranges = real(p3)
    colors_in_range = imag(p3)
    ;****************************************************
    ; Real(p2) is the largest value of contours that will
    ; be plotted. Typical values are 0.05 to 0.25.
    ;****************************************************
    max_min_w = real(p2)
    min_w = 1.0e20:
    ;****************************************************
    ; The equation being iterated.
    ; This example uses the standard Mandelbrot set equation.
    ;****************************************************
    w = w * w + c
    ;****************************************************
    ; Save the smallest value of sqrt(|w|).
    ;****************************************************
    temp = sqrt(|w|)
    IF (temp < min_w)
       min_w = temp
       save_range = range_num
    ENDIF
    ;****************************************************
    ; If the orbit point exceeds the maximum value, set z to
    ; the index into the colormap and set the bailout flag.
    ;****************************************************
    IF (|w| > max_w)
    IF (min_w < max_min_w)
        range_index = (min_w / max_min_w) * (colors_in_range - 1)
        z = range_index + save_range * colors_in_range + 1
    ELSE
        z = 0
    ENDIF
    bailout = 1
    ENDIF
    ;****************************************************
    ; Cycle through the range numbers (0 thru num_ranges - 1)
    ; With two color ranges, even iterations use color
    ; range 0, odd iterations use color range 1.
    ;****************************************************
    range_num = range_num + 1
    IF (range_num == num_ranges)
        range_num = 0
    ENDIF
    ;****************************************************
    ; Since we are using outside=summ, we have to subtract
    ; the number of iterations from z.
    ;****************************************************
    iter = iter + 1
    z = z - iter
    ;****************************************************
    ; Finally, we test for bailout
    ;****************************************************
    bailout == 0  && |w| < max_w
}


bubsjul1           { ; Copyright (c) Paul Carlson, 1998
  reset=1960 type=formula formulafile=carlson.par
  formulaname=bubbles_julia_mset passes=t
  center-mag=0.00981534/2.22045e-016/0.8503401
  params=-0.746410388/0.184309007/0.188/16/2/125 float=y maxiter=10000
  outside=summ colors=000zz0<123>aG0zVz<123>L5L000<3>000
  }

bubsjul2           { ; Copyright (c) Paul Carlson, 1998
  reset=1960 type=formula formulafile=carlson.par
  formulaname=bubbles_julia_mset passes=t
  center-mag=-0.00009916023966658/-0.00019030381371508/29\
  027.04/1/-109.999
  params=0.289631409419512/0.013316315158669/0.2/16/2/125
  float=y maxiter=5000 inside=255 outside=summ
  colors=000zz0<123>WC0zzz<123>OOO000<3>000
  }

The 3D Stalks method is somewhat similar.

>Is this sufficiently different to deserve being added to fractint?

It's certainly different.  And it would be considerably faster
as a builtin method.  And you wouldn't have to worry about "stealing"
the method from that web page - I developed the method in 1993.  I
think that he probably got the methods from one of my web sites
where I describe them briefly.

Paul Carlson


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Date: Tue, 26 May 1998 23:36:00 -0500
From: "Earl Simpson" <[e-mail]>
Subject: Re: (fractint) Printing documentation

- -----Original Message-----
From: Kivryn_H <[e-mail]>
To: [e-mail] <[e-mail]>
Date: Tuesday, May 26, 1998 10:54 PM
Subject: (fractint) Printing documentation


>Hi all,
>
>I hope someone will not mind sending me a quick e-mail to answer my
>question.  I get the digest and wouldn't mind getting the answer tonight
>so I can start printing.  My question, how can I print the documentation
>out for Fractint?  I don't see a doc. file.  Thanks for helping.
>
>Kivryn
>
Kivryn,

Open Fractint, hit the F1 key twice.  This should get you to the Main Help
File.  At the bottom of the right hand column is a reference to
documentation.  Highlight it and hit enter which will bring up another
screen about documentation.  Toward the bottom, the question is ask,
"Generate Fractint Doc now?"   I believe the answer here is obvious.

Hope this answers your question.

Earl Simpson


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Date: Tue, 26 May 1998 13:48:45 -0700
From: "Angela Wilczynski" <[e-mail]>
Subject: Re: (fractint) L-Systems

Kragen....

I think most vector based programs also can read the Photoshop standard.
However, VERY few folks have vector graphics programs.

Angela aka wizzle

Damien M. Jones wrote:
>
> Kragen,
>
>  - Does anyone have suggestions about what vector formats would be more
>  - widely readable by Win95 users?
>
> Windows metafile (.WMF).  Not sure where you can find out how to create
> such a file without the Windows API, though.
>
> Damien M. Jones   \\
> [e-mail]  \\  http://www.icd.com/tsd/ (temporary sanity designs)

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