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fractint-digest      Wednesday, February 4 1998      Volume 01 : Number 099




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

Date: Wed, 04 Feb 1998 12:52:33 +1300
From: "Morgan L. Owens" <[e-mail]>
Subject: Re: (fractint) Re: Spam from web pages

At 10:46 03/02/98 -0600, Damien M. Jones wrote:
>If there is software to scan web pages for e-mail addresses, I was not
>aware of it, but that doesn't mean it isn't there! :)  It's a little less
>practical, and a lot more time-consuming, to harvest addresses from
>existing web pages, unless you're prowling through an online community like
>GeoCities, because there are so many pages which don't contain addresses.
>
The principle is very simple: the search software downloads a page (pretty
much any page would do, but some major subject index like Yahoo would be
best) and notes all the links (trash everything else). Queues the http
links for further searching and records the mailto links for your spam
list. If you're spamming for yourself you can check the validity of the
addresses, but if you're just making a list for resale why bother?

I was caught this way myself once. I received junk email saying how "We
liked your web page and for a very low fee we will advertise it on our
ours". I was tempted to say "Yes! Advertise my web site! And tell me where
it is, cos I'd like to have a look at it myself some day!"

The only cases on the Web where my address has turned up has been in
archives and the occasional visitor's book.

MLO



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

Date: Tue, 03 Feb 1998 17:26:58 -0800
From: Mark Christenson <[e-mail]>
Subject: (fractint) Re: Feb '98 web pages / list volume

At 09:10 PM 2/3/98 -0000, Bagpuss wrote:
>Hi all,
>    I have now updated the pages for February, there are now
>contributions from 7 artists, with 37 images in total.

I don't know what posessed you to do this, but thanks!  I can always
use another venue.  Not to look a gift-horse in the mouth, but would
you consider providing links to our personal sites (or did I miss that?)

At 12:32 PM 2/3/98 -0600, Paul Lee wrote:
>What size thumbnails??  A percentage of the original image or a set
>size??  Will they be GIF or JPEG images??  If JPEG, how much compression
>will be applied??

A possible approach would be to emulate Jill Lawson's example, with
bandwidth-friendly 60x80 Fractint previews (or something on that order),
which, of course, include par data.

Jill's site is at:
http://web.ukonline.co.uk/members/jill.lawson/own-page/


Later, Bud


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

Date: Tue, 3 Feb 1998 20:31:01 -0600
From: "Tim Wegner" <[e-mail]>
Subject: Re: (fractint) list volume, pars, attachments, a solution?

> Something else that could help:  if those that reply to postings would
> eliminate the FractInt Signature and other parts of unreferenced email
> when replying.

I can shorten or eliminate the signature. I copied Jon Noring's
style in fractal-art. It seemed like a good idea, but maybe it is
just a bandwidth waster.

Email me privately with opinions and suggestions about the signature.

Tim


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Date: Tue, 03 Feb 1998 19:21:20 -0800
From: Wizzle <[e-mail]>
Subject: (fractint) Alternate Segregation

Instead of segregating the list by pars/frms versus everything else, how
about creating a list for discussing software/server type issues? I noticed
that those discussions tended to involve a relatively limited number of
people and were always "on topic." Or there might be some other natural
segregation.

Is the point of the list segregation caused by some limitation at the
xmission.com site or just personal problems with keeping up?

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Date: Tue, 03 Feb 1998 19:00:33 -0800
From: Wizzle <[e-mail]>
Subject: Re: (fractint) list volume, pars, attachments, a solution?

My response??

Blech.....I think....but I'm not sure. I think it means I'd have to
subscribe to both lists since I'm interested in all the topics but can't
contribute to everything. Am I correct?? Many of the postings are
cross-topical.....and it only takes seconds to disgard a posting one is not
interested in. For example....I love Jay's FOTN postings which often
feature a par as an example....but he discusses lots of math stuff too
which is "on topic" to the non-par/frm list. What to do?? post to both??
That just means there is MORE stuff to filter.

I briefly subscribed to a graphics list for the HTML guild.....compared to
that traffic, this list is light.  Personally, I work full time and long
hours (including many week ends), am a single mom, can maintain a 30mb+
website (which includes producing original graphics) and still keep up with
the traffic on this list. I believe the traffic was particularly heavy last
month as we had a real bonanza in terms of great formulas.  For you number
types....check my stats on fractals produced...

October - 9.3mb
November - 10.6mb
December - 27.1mb (joined fractint mailing list and was home during the
xmas break fractaling like mad)
January - 62.3mb!!!!!!!!!!!!!!!! (sooooooo many good formulas)

I think it is a poor idea to go into a reactive mode because one month
produces an abberation in list traffic.

Angela aka wizzle


At 10:58 AM 2/3/98 -0700, you wrote:
>The volume on this list is getting quite heavy.  I'd like to propose that
>we separate the posting of pars and formulas to a separate list, which is
>to be moderated by a piece of software.
>
>
>What do people think of this suggestion?  This would split off the
>par/frm mail from this list and return the discussion more to methods,
>help, etc.  Since the par distribution list would automatically web
>archive every submission, you could refer to it by URL in the fractint
>discussion if you wanted to.  The =3D problem would be gone forever;
>the line wrap problem would be gone forever; the missing
>formulaname and formulafile from a par problem would be gone forever,
>missing colormaps, etc., etc., etc.
>--
>                        Rich Thomson
>                        [e-mail]
>
>-
>------------------------------------------------------------
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>Post Message:   [e-mail]
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>Unsubscribe:    [e-mail] "unsubscribe fractint"
>
>


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

Date: Tue, 3 Feb 1998 21:23:43 -0700 (MST)
From: Kerry Mitchell <[e-mail]>
Subject: (fractint) Happy Valentine's Day!

Here is another collection of pars and formulas, including 2 valentines
day images.  Enjoy!

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

comment { ; narrative copyright Kerry Mitchell

Fun with fractions

There is really no good mathematical reason for these formulas,
but what the heck.  The original thought was to look at what
happens with the fractional parts of the iterates?  This became,
"how often is the real part of the iterate less than the imaginary
part?"  The fractional part is recovered using either the round()
or trunc() functions.  For example, if z = 12.3456, then the
fractional part of z is 0.3456, which is z - trunc(z).  The round()
function can also be used, and can give different results.  For
each iteration, the fractional parts are computed and the comparison
made.  If the real part is less than the imaginary part, then a
counter is incremented.  At the end of the orbit, the counter is
divided by the number of iterations, and scaled into an angle for
decomposition coloring.

Normally, the fractional part is simply that right of the decimal
point.  However, this can be changed through the use of the rounding
factor.  The iterate is divided by this factor, then the fractional
part is taken, and multiplied by the factor.  For example, if the
rounding factor is 10, then z becomes 1.23456.  The fractional part
is 0.23456, which when multiplied by 10 becomes 2.3456.  In these
formulas, the rounding factor is complex, allowing greater
flexibility.

Two formulas add even greater possibilities.  The fractional part
can be computed using either the round() or trunc() functions.
Before rounding or truncating, the iterate can also be run through
any of the standard littany of Fractint functions.  Go nuts.

In addition to the xlty- functions, there are the heart- functions
(both come in Julia and Mandelbrot flavors).  The heart- functions
started out asking, "how often is the magnitude of the fractional
part less than the polar angle?"  A few algebraic tricks later, this
question changed to, "how can hearts be used to color a fractal?"
The basic shape is shown using the "basic-heart" parameter selection.
It shows the hearts that are the "background" to these images.  The
"basic-xlty" parameters shown the same for the xlty- formulas.

}

valentine1         { ; copyright Kerry Mitchell
  reset=1960 type=formula formulafile=fractint.frm
  formulaname=heart_jul function=round/ident center-mag=0/0/0.55
  params=0.28/0.005/3/0.5/0.8/0.6 float=y maxiter=256 inside=0
  decomp=256 periodicity=0 colors=000<61>y99zAAzAAzBB<61>zzzzzz\
  zyz<60>i1ih0hh0hg0g<61>000 cyclerange=0/255
  }

valentine2         { ; copyright Kerry Mitchell
  reset=1960 type=formula formulafile=fractint.frm
  formulaname=heart_man function=round/ident
  center-mag=-1.93970441053729800/+0.00162056367432151/1892693
  params=4/4/1/0 float=y maxiter=1000 inside=0 decomp=256
  periodicity=0 colors=C0C<16>000000100<60>y99zAAzAAzBB<61>\
  zzzzzzzyz<60>i1ih0hh0hg0g<43>D0D cyclerange=0/255
  }

xlty-julia-sample  { ; copyright Kerry Mitchell
  reset=1960 type=formula formulafile=fractint.frm
  formulaname=xlty_jul function=round/recip passes=1
  center-mag=0/0/0.8/1/90 params=0.2892573747165716/0.013391178\
  93975959/4/1/0.1/0.1 float=y maxiter=2000 inside=0 decomp=256
  periodicity=0 colors=000400500600810<4>C20C20D20D30E30<3>G40H\
  40H40H50<18>P91PA1PA1PA1QA1<29>YI5YI5YI5YJ5ZJ5ZJ5<57>iYIiYIjY\
  IjYJjZJjZJ<41>qhWqiXqiXqiYqiY<67>zzz cyclerange=0/255
  }

xlty-mandel-sample { ; copyright Kerry Mitchell
  reset=1960 type=formula formulafile=fractint.frm
  formulaname=xlty_man function=round/log passes=1 center-mag=\
  -0.6/0/0.8 params=4/1.5/0/0.5 float=y maxiter=256 inside=0
  decomp=256 periodicity=0 colors=006108<4>30F40G40H50I50I61J<\
  8>A2QB2QB2RC2RC2S<5>F4VG4WG4WH4W<12>N8aO9bO9bPAbPAc<20>ZKj_K\
  k_Lk`Mk<13>gUpgVphWphXpiXq<33>zyzzzzzyz<31>jZqiYqiXqhXphWpgV\
  p<25>WGhVFgVFgUEfUEf<18>K6_K6ZJ6ZJ6YI5Y<3>G4WG4WF4VF3U<14>71M\
  71L61K61J50I<3>30F30E20C20B<2>006000 cyclerange=0/255
  }

basic-heart        { ; copyright Kerry Mitchell
  reset=1960 type=formula formulafile=fractint.frm formulaname\
  =heart_jul function=round/ident center-mag=-0.2/0/0.6666667/\
  1.333333 params=0/0/0/1/1/0 float=y maxiter=256 inside=0
  decomp=256 periodicity=0 viewwindows=1/1/yes/0/0 colors=000C\
  GS<4>9Ne<7>eFQbJPZNOOWNCdM7fN1iP<3>5Vc<9>NnZPqYRqY<6>kqS<4>m\
  ux<3>zaY<13>T3pQ0rQ4r<13>Wyw<2>GJ1<6>x2N<2>pBmtRWxfE<9>SD1<1\
  2>ecO<8>8MY<14>4pJ<11>EHC<4>si5<10>bka<4>0jv<2>TEY<4>coOfwLf\
  uN<13>hUp<4>Fjo<13>8T67R29T4<7>ShOVjRZeS<5>x7_<7>ime<6>Zhezz\
  zWge cyclerange=0/255
  }

basic-xlty         { ; copyright Kerry Mitchell
  reset=1960 type=formula formulafile=fractint.frm formulaname=xlt\
  y_jul function=round/ident center-mag=-0.00626305/0/0.6666667/1.\
  333333 params=0/0/0/1/1/0 float=y maxiter=256 inside=0 decomp=256
  periodicity=0 viewwindows=1/1/yes/0/0 colors=000CGS<4>9Ne<7>eFQb\
  JPZNOOWNCdM7fN1iP<3>5Vc<9>NnZPqYRqY<6>kqS<4>mux<3>zaY<13>T3pQ0rQ\
  4r<13>Wyw<2>GJ1<6>x2N<2>pBmtRWxfE<9>SD1<12>ecO<8>8MY<14>4pJ<11>E\
  HC<4>si5<10>bka<4>0jv<2>TEY<4>coOfwLfuN<13>hUp<4>Fjo<13>8T67R29T\
  4<7>ShOVjRZeS<5>x7_<7>ime<6>ZhezzzWge cyclerange=0/255
  }

frm:xlty_man { ; Kerry Mitchell
        ;
        ; colors by how often x < y, where x & y are the
        ; real & imaginary parts of the fractional part of
        ; the iterate of the Mandelbrot set
        ;
        ; real(p1) = bailout (try 4)
        ; imag(p1) = color speed (try 1)
        ; p2 = rounding factor (try 1)
        ; fn1 = rounding function, either round() or trunc()
        ; fn2 = arbitrary function of iterate (try log())
        ; calculation uses variable zc, z used for coloring
        ; use decomp=256
        ;
        zc=0, c=pixel, iter=2, twopi=2*pi, count=0
        maxr=real(p1), speed=imag(p1)*twopi*255/256
        roundfac=p2:
        ;
        ; adjust iterate through arbitrary function and find
        ;   fractional part
        ;
        temp=fn2(zc)/roundfac, frac=roundfac*(temp-fn1(temp))
        ;
        ; update counter if conditions are right
        ;
        if (real(frac)<imag(frac))
          count=count+1
          end if
        ;
        ; bailout
        ;   scale counter into decomposition angle
        ;   set "iteration done" flag (iter = -1)
        ;
        if ((|zc|>maxr)||(iter==maxit))
          angle=speed*count/(iter-1)
          z=cos(angle)+flip(sin(angle))
          iter=-1
        else
          iter=iter+1
          zc=sqr(zc)+c
        endif
        iter>0
        }

frm:xlty_jul { ; Kerry Mitchell
        ;
        ; colors by how often x < y, where x & y are the
        ; real & imaginary parts of the fractional part of
        ; the iterate of the Julia set
        ;
        ; p1 = Julia parameter
        ; real(p2) = bailout (try 4)
        ; imag(p2) = color speed (try 1)
        ; p3 = rounding factor (try 1)
        ; fn1 = rounding function, either round() or trunc()
        ; fn2 = arbitrary function of iterate (try log())
        ; calculation uses variable zc, z used for coloring
        ; use decomp=256
        ;
        zc=pixel, c=p1, iter=2, twopi=2*pi, count=0
        maxr=real(p2), speed=imag(p2)*twopi*255/256
        roundfac=p3:
        ;
        ; adjust iterate through arbitrary function and find
        ;   fractional part
        ;
        temp=fn2(zc)/roundfac, frac=roundfac*(temp-fn1(temp))
        ;
        ; update counter if conditions are right
        ;
        if (real(frac)<imag(frac))
          count=count+1
          end if
        ;
        ; bailout
        ;   scale counter into decomposition angle
        ;   set "iteration done" flag (iter = -1)
        ;
        if ((|zc|>maxr)||(iter==maxit))
          angle=speed*count/(iter-1)
          z=cos(angle)+flip(sin(angle))
          iter=-1
        else
          iter=iter+1
          zc=sqr(zc)+c
        endif
        iter>0
        }

frm:heart_man { ; Kerry Mitchell
        ;
        ; colors by how often r < t, where r & t are the
        ; magnitude & polar angle of the fractional part of
        ; the iterate of the Mandelbrot set
        ; fills fractal with little hearts
        ;
        ; real(p1) = bailout (try 4)
        ; imag(p1) = color speed (try 1)
        ; p2 = rounding factor (try 1)
        ; fn1 = rounding function, either round() or trunc()
        ; fn2 = arbitrary function of iterate (try log())
        ; calculation uses variable zc, z used for coloring
        ; use decomp=256
        ;
        zc=0, c=pixel, iter=2, twopi=2*pi, count=0
        maxr=real(p1), speed=imag(p1)*twopi*255/256
        roundfac=p2:
        ;
        ; adjust iterate through arbitrary function and find
        ;   fractional part
        ;
        temp=fn2(zc)/roundfac, frac=temp-fn1(temp)
        r=cabs(frac)
        t=cabs(imag(log(frac))/twopi)
        ;
        ; update counter if conditions are right
        ;
        if (r<t)
          count=count+1
          end if
        ;
        ; bailout
        ;   scale counter into decomposition angle
        ;   set "iteration done" flag (iter = -1)
        ;
        if ((|zc|>maxr)||(iter==maxit))
          angle=speed*count/(iter-1)
          z=cos(angle)+flip(sin(angle))
          iter=-1
        else
          iter=iter+1
          zc=sqr(zc)+c
        endif
        iter>0
        }

frm:heart_jul { ; Kerry Mitchell
        ;
        ; colors by how often r < t, where r & t are the
        ; magnitude & polar angle of the fractional part of
        ; the iterate of the Julia set
        ; fills fractal with little hearts
        ;
        ; p1 = Julia parameter
        ; real(p2) = bailout (try 4)
        ; imag(p2) = color speed (try 1)
        ; p3 = rounding factor (try 1)
        ; fn1 = rounding function, either round() or trunc()
        ; fn2 = arbitrary function of iterate (try log())
        ; calculation uses variable zc, z used for coloring
        ; use decomp=256
        ;
        zc=pixel, c=p1, iter=2, twopi=2*pi, count=0
        maxr=real(p2), speed=imag(p2)*twopi*255/256
        roundfac=p3:
        ;
        ; adjust iterate through arbitrary function and find
        ;   fractional part
        ;
        temp=fn2(zc)/roundfac, frac=temp-fn1(temp)
        r=cabs(frac)
        t=cabs(imag(log(frac))/twopi)
        ;
        ; update counter if conditions are right
        ;
        if (r<t)
          count=count+1
          end if
        ;
        ; bailout
        ;   scale counter into decomposition angle
        ;   set "iteration done" flag (iter = -1)
        ;
        if ((|zc|>maxr)||(iter==maxit))
          angle=speed*count/(iter-1)
          z=cos(angle)+flip(sin(angle))
          iter=-1
        else
          iter=iter+1
          zc=sqr(zc)+c
        endif
        iter>0
        }



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

Date: Tue, 3 Feb 1998 21:27:05 -0700 (MST)
From: Kerry Mitchell <[e-mail]>
Subject: Re: (fractint) Happy Valentine's Day!

By the way--one of the valentine images from that par file has been posted
to alt.binaries.pictures.fractals.

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


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Date: Wed, 4 Feb 1998 00:38:56 -0500
From: "Blake Hyde" <[e-mail]>
Subject: Re: (fractint) list volume, pars, attachments, a solution?

:Those discussion-y posts take up about as much volume as the actual pars,
:and are much more annoying (though quite necessary) to my mind. Plus the
:posts telling people that the pars they posted are pretty, of course. I
:think that's the group-of-posts that could be most usefully moved to a
:separate list. Nu?


    I actually like the discussion posts. It's a whole lot better to have a
high list volume and discussion than a cold, impersonal list with two or
three messages a month. Take, for instance, the advent of an old list I used
to belong to, gen-disc. It started out lively, sort of like this one. Then,
as the volume got larger, people started complaining because people were
"gen-discing." Then, they decided to split the traffic into several
mini-lists.
    Then it became one of those you dreaded to post on, like when you never
knew which list your post got put on. It eventually ended up Dead (tm). So,
for my part, I say keep it as it is. Of course, I'm one of the ppl who posts
off-topic all the time, so I might not count. :)
    But, of course, there is the fact that I would probably subscribe to all
of them. So it really wouldn't matter to me... but please try not to Die
(c). I have to have something to do when I'm not in the mood to fractal.
(Not that that's often, but...)

Blake Hyde ~ Casper ~ Novan Dragon
Homepage: www.connectu.net/bhyde <--- my www server is down, dunno why
*sigh*
Email: [e-mail]



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Date: Tue, 03 Feb 1998 16:37:53 -0800
From: James Polley <[e-mail]>
Subject: Re: (fractint) Is this just me, or...?

I hate to disagree, but My copy of netscape is missing some subjects! And it has
some repeats!

Justin A. Kolodziej wrote:

> Blake Hyde wrote:
> >
> > I have gotten several articles from the list with no subject, that Outlook
> > ExpressYourHatred won't read. Is it just me, or is it the list? Or OE?
>
> Netscape reads them, so it must be LookOut.  But it seems I've seen some
> of these messages before...
>
> > Blake Hyde ~ Casper ~ Novan Dragon
> > Homepage: www.connectu.net/bhyde
> > Email: [e-mail]
> >
> > -
> > ------------------------------------------------------------
> > Thanks for using Fractint, The Fractals and Fractint Discussion List
> > Post Message:   [e-mail]
> > Get Commands:   [e-mail] "help"
> > Administrator:  [e-mail]
> > Unsubscribe:    [e-mail] "unsubscribe fractint"
>
> --
> Justin A. Kolodziej
> Why pay for an OS when you can get a clearly superior one for free?
> Justin Kolodziej is [e-mail]
> Marquette University is www.mu.edu
>
> -
> ------------------------------------------------------------
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> Unsubscribe:    [e-mail] "unsubscribe fractint"






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Date: Wed, 4 Feb 1998 00:32:14 -0800
From: "Jay Hill" <[e-mail]>
Subject: (fractint) F.O.T.N. (Fractal of the Night) 4 Feb 1998 (FractoBall Spat)

F.O.T.N. (Fractal of the Night) 4 Feb 1998 (FractoBall Spat)
(this is an experiment, does all the word wrap come through OK)
(sorry about the multiple post, my san.rr.com web site is frozen again)

Dr. J, got too much sun over the weekend. Now it is effecting his behavior. The
latest is, well, he is really mad at me for not helping him
with a math problem. Believe me, I tried, but email being slow and even though
my friends are helpful...  Anyway, he got into a quarrel
with a FractoBall official about a call in the last FractoBowl game.

Oh, his sun burn? Have you ever met someone who no matter how much sun burn
they look like they have, they don't peel. They just
suddenly have a nice tan. Well, that is Dr. J., Figure 1.   He has forgotten
about the Sunday's sunburn, and it is only Tuesday!

Oh yes, where was I...

Oh yes, the FractoBall feud.  It seem there was a bad call, er... a
questionable call. You see, if a player touches out of bounds he is out
of the play.  And since the FractoBall field is not a rectangle, and refereeing
can be problematic. There seems to always be a discussion
(they call it an iteration) about these plays. On some of these border line
plays, discussions can carry on into billions of iterations.

Now these iterations take on a routine flavor after a while. And if they settle
to a single result, then the player is considered 'in'.  But if it
settles into a repeating cycle of two or more values, the discussion is
considered unfocused (well, that is what they call it) and the player
is 'out' of bounds.  The formula for the iterations used in the games is

1) z= z^3 + c

Figure 1.  Dr. J has a nice tan after all.
http://www.geocities.com/CapeCanaveral/Lab/3825/FotN35.html

Figure 2.  An idealized FractoBall field.

The FractoBall field has a fat figure 8 shape. Fans collect in the heart shaped
cells around the field. The boundary of the actual playing
field is, in complex arithmetic given by this formula, describing a cycloid.

Let

2) z = exp(i*pi*theta)/sqrt(3);

Then

3) c = z(1-z^2).

Theta (the Greek letter) is an angle which allows us to trace out the boundary.
 This equation is used to make the original field markings.
But then as the game proceeds, the marks get messed up.  The players kick up a
lot of Fatou dust.  When a doubtful play occurs, a flag
thrown down by an official marks the questionable spot. After using an
equivalent of GPS (Global Positioning System) the officials
obtain the complex coordinate value for the mark. Application of Eqn 1,
iterated until a result can be reached, decides all.

In the last game, a very long almost non-terminating iteration occurred with
tempers flaring as the minutes passed. Dr. J had become very
irate about this. He was in fact scolded by an official for shouting and
jeering.  But he tells me it is unfair. (no duh, right). The cameras
actually recorded that spat on the sidelines, there not being much else to
cover.

Anyway, Dr. J claimed "I can make these questionable play calls in one
iteration!"

They said "Prove it! or sit down!!"

Dr. J has been fuming ever since.  "What do they know", he sputters.  I have
asked by email if he actually has a better way to make the
call. He just sputtered, of course. Sputtered? you ask? on email?  Well here is
a sample of his email:

Of cORse i Can HOw daRE you QUestIOn Dr J! MaYBe ILL teLL you, MaYBe I woNT.

I'm sure I can sort this out for us in the real world tomorrow. Until then...
Stay healthy,
Jay



FGZ-Mand { ; (c) Jay Hill, 1998
IF( |p3| == 0)
p3 = 16
ENDIF
c=pixel, z=sqrt(-c), bailout = real(p3):
z1=z*z + c;
z = p1*z1*z1/(z1 + p2) + c;
|z| <= bailout
}


FGZ-M-DrJ-Sun-Burn { ; (c) Jay Hill, 1998
reset=1960 type=formula formulafile=fgz.frm formulaname=fgz-mand
center-mag=-0.02796925726298376/-0.00024404017074993/177.1369/1/-90
params=16/0/0.1/0/0/0 float=y maxiter=2560 inside=bof61 outside=128
decomp=256
colors=mU0kT1UA3cK3XA6bN6AAAcL5RA4cK\
4A43SG3K62OE2UD1KB0UB0cA0UA0F90U80D7\
0K70B60<4>520320210000000<4>321K2143\
1<87>mcKcmKmcK<125>000
}



frm:Colorit-3 { ; (c) Jay Hill, 1998
b=p1 ; p1=cos(a)+i*sin(a), a=light angle
if(p1==0)
 p1=1
endif
a=pi*p1/180, b=cos(a)+i*sin(a) ; p1= light angle (deg)
done = 1, iter=0, z = 0, zc = 0, c = pixel, dz=1
: ; initialization.
iter = iter+1 ; gotta count em
dz=3*sqr(zc)*dz+1 ; derivative, dz/dc
zc=zc*sqr(zc) + c ; standard MSet iteration
if(|zc| >= 1024) ; Bailout
 z = z -8 + ((sin(2*pi*iter/256)*Real(b*dz/zc))>0) + iter
 done=-1 ; Set flag to force an exit.
endif
done >= 0 ; Continue if the flag >=0.
}
FractoBall-field { ; (c) Jay Hill, 1998 FractoBall field
reset=1960 type=formula formulaname=colorit-3
center-mag=-8.88178e-016/-6.66134e-016/0.9861933/1/-90 params=120/0
float=y maxiter=2560 inside=0 outside=real periodicity=0
colors=UcAVTTcccVTTcccVTTcccVTTcccVTTcccVTTcccVTTcccVTTcccVTTcccVTTcccUU\
UcccUUUccc0mK0U02mJ1U05nI3U07nH5V0AoG6V0CoF8W0FpDAW0IqCCX0KqBDX0NrAFX0Pr\
9HY0Ss8JY0Vt6KZ0Xt5MZ0wK0mc0wK0mc0wK0mc0wK0mc0wL0mc1wL1mc1wL1lc1wM1lc1wM\
1lb2wM1lb2wN2lb2wN2kb2wN2kb3wO2kb3wO3kb3wO3kb3wP3ja4wP3ja4wP3ja4wQ4ja4wQ\
4ja5wQ4ia5wR4ia5wR4ia5wR5i`6wR5i`6wS5h`6wS5h`7wS6h`7wT6h`7wT6h`7wT6g_8wU\
6g_8wU7g_8wU7g_8xV7g_9xV7f_9xV8f_9xW8f_9xW8fZAxW8fZAxX8eZAxX9eZAxX9eZBxY\
9eZBxY9eZBxY9dZBxYAdYCxZAdYCxZAdYCxZAdYDx_BdYDx_BcYDx_BcYDx`BcXEx`BcXEx`\
CcXExaCbXExaCbXFxaCbXFxbDbXFxbDbXFxbDaWGxcDaWGxcDaWGxcEaWGxdEaWHxdE`WHxd\
E`WHyeF`WHyfG`VIyfH`VIygJ_VIygK_VJyhL_VJyhM_VJyiO_VJyiPZUKyjQZUKyjSZUKyk\
TZUKxkUZULxlVYULxlXYULxmYYULxmZYTMxn`YTMxnaXTMxobXTMxocXTNxpeXTNxpfXTNxq\
gWSOxqhWSPxrjWSPxrkWSQxslWSQxsnVTRxtoVTRxtpVTSxuqVTSxus
}

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Date: Wed, 04 Feb 1998 10:15:55 +0100
From: Peter Otterstaetter <[e-mail]>
Subject: Re: (fractint) list volume, pars, attachments, a solution?

Rich Thomson wrote:

> we separate the posting of pars and formulas to a separate list, which is
> to be moderated by a piece of software.
... <snipped> ...
>
> What do people think of this suggestion?
... <snipped> ...
> The =3D problem would be gone forever; etc. ...

sounds great to me!
May be some people like holding discussion and corresponding par/frm
comments etc. together;
my suggestion: let this list untouched AND separate the par/frm postings
as you described. So we have all the discussion stuff together and
people who is interested in par/frm only can subscribe to the new list.
Just my idea.

Peter

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Date: Wed, 4 Feb 1998 07:14:02 -0500
From: Sylvie Gallet <[e-mail]>
Subject: (fractint) gravijul

Hi Les,

>> >>  It's been a while since we haven't seen pars based on gravijul! =

>> Here are mine:<<
>>
>> Exquisite!

  Thanks!

>> I especially liked #2

  My favorite too!

>> Any "gallet" variations on the gravijul.frm in the pipeline?

  Nothing interesting for now...

  Cheers,

        - Sylvie

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Date: 04 Feb 1998 14:51:28 +0100
From: Brederlow <[e-mail]>
Subject: Re: (fractint) M-set area: an Idea

[e-mail] (Paul Derbyshire) writes:

> There are well-known upper & lower bounds on the area of M. I have a
> thought: Get similar bounds for the areas of the M-set for z^n+c, for n=3,
> 4, 5, and 50. This last will be nearly a circle and the area estimate
> should be quite good. If there's a logical progression from the estimated
> areas, then the area for z^50+c could be used to get a precise guess at
> the area of M, with orders of magnitude more precision than we have now.

If you can prove that there is a logical progression it might be
usefull, but heres my two pence.

The area of z^n+c converges to a circle for n>>\infty. The higher n is
now, the higher the resolution must be to get a good result. The
relative error could be expressed as

         Abs error
- ------------------------------
Area of circle - Area of M-Set

and that would rise for higher n. Also the logical progression would
probably magnify that error when following it backwards from big n to
z`2+c.


By the way, what are the upper and lower bounds? And how are they
calculated?
I know that it can be done by brute force calculating every pixel and
counting, but some sort of speedup might be used also. Of cause
Guessing, tesseral and boundary are out of question, because they
don't give exact results. But what about distance estimation and
cyclic checks?

May the Source be with you.
            Mrvn

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Date: Wed, 4 Feb 1998 09:23:58 -0500 (EST)
From: Ian Kaplan <[e-mail]>
Subject: Re: (fractint) list volume, pars, attachments, a solution?

Blake wrote:
>
(I wrote:)

> :Those discussion-y posts take up about as much volume as the actual pars,
> :and are much more annoying (though quite necessary) to my mind. Plus the
> :posts telling people that the pars they posted are pretty, of course. I
> :think that's the group-of-posts that could be most usefully moved to a
> :separate list. Nu?
>
>
>     I actually like the discussion posts. It's a whole lot better to have a
> high list volume and discussion than a cold, impersonal list with two or
> three messages a month. Take, for instance, the advent of an old list I used
> to belong to, gen-disc. It started out lively, sort of like this one. Then,
> as the volume got larger, people started complaining because people were
> "gen-discing." Then, they decided to split the traffic into several
> mini-lists.

It's not that I dislike that kind of discussion, at all. But if we were
running multiple lists, I could filter them into separate mailboxes and
otherwise organize my life that much more. Nu.


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Date: Wed, 04 Feb 1998 10:17:31 -0700
From: Rich Thomson <[e-mail]>
Subject: Re: (fractint) list volume, pars, attachments, a solution?

In article <[e-mail]> ,
    "Morgan L. Owens" <[e-mail]>  writes:
> I would like to make a suggestion at this point. [normalizing
> par/frm entries]

I like this idea, I will include it.

> If a PAR is submitted that requires a formula that is neither provided in
> the submission nor is in the formula archive (which is maintained in an
> orgform manner) - or not in the Fractint standard release, for that matter
> - an email could be sent back to the sender noting the fact and requesting
> that the formula be supplied: the par is not posted until its formula is
> available.

This can be a pain to implement, but is a good suggestion.  It
probably won't happen in the first round of coding.  The software will
either accept entries referring to unknown pars (noting them as such
in the distribution), or bounce them back to the sender.

> [moderation software accepting archive query requests]

Majordomo provides a way for files to be retrieved by email, and
listings of files to be obtained on a per-list basis.  The archive
would also be available by ftp and http access.  Harvest works well as
a content index database -- that would be the best tool for searching.
I don't want the moderation software to become too complicated; I'd
rather use existing tools wherever I can.

> With all this extra functionality, of course, I note that the mailing list
> itself becomes more like a noticeboard announcing new pars and formulae to
> its subscribers.

That was my idea.

> I'm not sure about the thumbnail idea - wasn't there some trouble some time
> back with binary attachements getting munted somewhere along the line?

That is why there are 4 varieties of distribution available to
subscribers -- choice is good.  If you choose a thumbnail distribution
and you find the thumbnails are getting corrupted in delivery, then
you can switch to a non-thumbnail version by unsubscribing from one
mailing list and subscribing to another.

> Of course, if the idea about requesting and receving copies of the archive
> were to be implemented, it would be a _very good_ idea to use a binary
> encoding.

Open-ended archives like this usually aren't available as a single
binary entity because that entity grows larger and larger over time.
Majordomo also provides digest capability, so it is possible that a
digest version of the par distribution lists could be created allowing
people to receive approximately similarly sized chunks of pars at
irregular intervals, based on list volume.

Thanks for your good suggestions.
- --
                                               Rich Thomson
                                               [e-mail]

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Date: Wed, 04 Feb 1998 10:22:00 -0700
From: Rich Thomson <[e-mail]>
Subject: Re: (fractint) list volume, pars, attachments, a solution?

In article <01bd312f$2fa972e0$[e-mail]> ,
    "Blake Hyde" <[e-mail]>  writes:
> [list split resulted...] It eventually ended up Dead (tm).

My real motivation is to make the distribution of pars/frm/etc. files
for fractint easier, archivable and less error-prone.  I seriously
doubt that it would kill discussion on this list!
- --
                                               Rich Thomson
                                               [e-mail]

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End of fractint-digest V1 #99
*****************************