POV-Ray : Newsgroups : povray.advanced-users : Subsetting Image for Parallel Operation Server Time
27 Dec 2024 23:57:40 EST (-0500)
  Subsetting Image for Parallel Operation (Message 1 to 3 of 3)  
From: nomail
Subject: Subsetting Image for Parallel Operation
Date: 23 Apr 2004 16:10:00
Message: <web.40897709ab00645c4fa28b4a0@news.povray.org>
I have a pov file that will take about a month to render as is. I have
access to a number of computers and was planning on using the Start Row,
End Row, Start Col, End Col options to subset out the image and deliver to
each processor. Then using some home built software merge all of the
subsections into one complete image. Problem is that while the image
subsection properly displays in the locally "displayed while rendering"
image it does not in the image output to a file. Have tried this with PNG
and Bmp with same results. Assume I want  to render the section marked X
in:

0000
0000
00X0
0000

The subsection shows up in the proper place while rendering but the image is
saved to a file as:

00X0
0000
0000
0000

I can work around this with extra work but wanted to be sure that this is a
real problem and not one that I have caused.

Thanks for any comments.

Chuck C


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From: Christoph Hormann
Subject: Re: Subsetting Image for Parallel Operation
Date: 23 Apr 2004 16:30:02
Message: <c6buac$ah6$1@chho.imagico.de>
nomail@nomail wrote:
> [...]
> 
> I can work around this with extra work but wanted to be sure that this is a
> real problem and not one that I have caused.

This is neither your fault nor a bug but an intended behaviour.  A small 
program that can automatically put together partial POV-Ray renders in 
ppm format can be found on:

http://www.tu-bs.de/~y0013390/povany/index.html

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 21 Mar. 2004 _____./\/^>_*_<^\/\.______


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From: nomail
Subject: Re: Subsetting Image for Parallel Operation
Date: 25 Apr 2004 10:20:00
Message: <web.408bc7fdebc056fd4fa28b4a0@news.povray.org>
Christoph Hormann <chr### [at] gmxde> wrote:
> nomail@nomail wrote:
> > [...]
> >
> > I can work around this with extra work but wanted to be sure that this is a
> > real problem and not one that I have caused.
>
> This is neither your fault nor a bug but an intended behaviour.  A small
> program that can automatically put together partial POV-Ray renders in
> ppm format can be found on:
>
> http://www.tu-bs.de/~y0013390/povany/index.html
>
> Christoph
>
> --
> POV-Ray tutorials, include files, Sim-POV,
> HCR-Edit and more: http://www.tu-bs.de/~y0013390/
> Last updated 21 Mar. 2004 _____.//^>_*_<^/.______

Christoph
Thanks for pointer. I downloaded the progs at the web site.
Chuck


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