ftp.xmission.com/2014.06.ftp.xmission.com.tar/ftp.xmission.com/pub/lists/fractdev/archive/fractdev.200111

Internet Message Format | 2001-11-25 | 7KB

From: "Paul N. Lee" <[e-mail]>
Subject: (fractdev) FractInt versus XFractInt
Date: 07 Nov 2001 10:43:18 -0600

Scott Boyd brought up an issue with me yesterday concerning the number
of bytes per image between the two different copies which we both create
for our hosting of Jim's FOTD.  This all started from Andrew Coppin
noticing the "fuzzy" images of the FOTD for 05-11-01 (Mandelbrot
Funhouse).

That morning I had been running late, so I just downloaded the image
which Scott had already posted to his website and used it for mine
(which explains why both were "fuzzy").  After Andrew's email, I just
generated the image myself and uploaded that before sending a message to
the FractInt-List.  This newer image was of course run on a Pentium
machine which has a Windows operating system and uses the version 2.02
of FractInt, just like Jim Muth does.

Scott had of course read the messages to the FractInt-List and tried to
re-generate the image himself, but was unable to get the same clear
image.  This is part of the email I received from Scott:

       "I downloaded your new image, generated a par file
        for it, and then generated the image on my Linux
        machine.  It was better than the original, but not
        as clear as your new image.  So I just went and
        posted yours....

        I noticed it was a lot larger file size than my
        original image, too."

I had replied back to Scott stating that "there seems to always be a
difference between the Linux version and the DOS version".  Most times
the images are pretty close to the same as for as visible content goes,
and hardly noticeable at all.  But a few times it has been extremely
different in the image.  I do not know why this is, but I do know that
certain formulae and parameters that Jim uses will affect what Scott
produces versus what I produce.

Also, the DOS generated images are usually always larger in the number
of bytes for each image.  This got me to looking very close between
today's versions of the FOTD for 07-11-01 (Spirals-Plus).  If one
compares the two copies, along the x- and y-axis near the top and sides,
there are some areas of darker red colors.  I notice that my DOS version
has an extra band of red color that the Linux version does not.  This
got me looking at other areas, and noticing that the same is true
throughout the whole image.

This of course explains the added size in bytes between DOS and Linux,
but does not explain why I generate more colors and/or more detailed of
an image.  Does any of the Developers who are involved with the porting
to the X-environment know why this occurs??  Or is it something that is
of no concern??


Sincerely,
P.N.L.
http://www.fractalus.com/cgi-bin/theway?ring=fractals&id=43&go

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

From: Rich <[e-mail]>
Subject: Re: (fractdev) FractInt versus XFractInt
Date: 07 Nov 2001 10:09:26 -0700


In article <[e-mail]>,
    "Paul N. Lee" <[e-mail]>  writes:

> Does any of the Developers who are involved with the porting
> to the X-environment know why this occurs??  Or is it something that is
> of no concern??

Wild guess: perhaps it has something to do with how the FPU precision
is set in the two environments?
--
Ask me about my upcoming book on Direct3D from Addison-Wesley!
  Direct3D Book <http://www.xmission.com/~legalize/book/>
    Don't Support Spammers!  Boycott Fractal Painter 7!
     <http://www.xmission.com/~legalize/spammers.html>

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

From: "Jonathan Osuch" <[e-mail]>
Subject: (fractdev) ftp to julia
Date: 11 Nov 2001 18:45:30 -0600

Damien,

Once again, I am unable to ftp to julia.fractalus.com.  I can't get in with
SSH either.  Browsing to it works fine.  I am currently at home, which is
where I had the problem the last time.  I'll be going back to Illinois
tomorrow morning so I can try it from there tomorrow night.

Jonathan



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

From: "Jonathan Osuch" <[e-mail]>
Subject: (fractdev) Allegro port
Date: 12 Nov 2001 18:20:05 -0600

I've brought the Xfractint Allegro port up to version 20.2.  The Allegro WIP
(Work In Progress) has changed to 3.9.38 and the Xfractint port still works.
The installation of the Allegro rpm seems to work much better than it has in
the past.  I keep trying to remember to put together a text file containing
the steps required to make it all work together.  Maybe tonight.

The solid guessing method still has a minor problem, so don't be alarmed
when the image first comes up.  I had commented out the passes=1 statement
in sstools.ini for testing purposes and forgot to put it back.

Jonathan



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

From: "Jonathan Osuch" <[e-mail]>
Subject: (fractdev) 24 bpp and Xfractint
Date: 24 Nov 2001 14:26:49 -0600

Tim,

I have a fix for the problem Xfractint was having with 24 (and 32) bpp
modes.  It's a small patch, but I may combine it with the really small patch
I have for Fractint and issue them as patch 1 to version 20.2.

Jonathan



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

From: "Jonathan Osuch" <[e-mail]>
Subject: (fractdev) 20.2 patch 1
Date: 25 Nov 2001 18:39:42 -0600

Tim,

The diff and fradev.zip for patch 1 of version 20.2 are now available.  I'll
get the rest of the files updated in the next day or so.

Jonathan



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