[Radiance-general] rpiece question

[Mark Stock]

Iebele,

The runsmp script contained in my Radiance benchmark tests 
demonstrates this. It's what I use to render my large art images.

http://mark.technolope.org/pages/rad_bench.html
http://mark.technolope.org/radmisc/bench4.tar.gz

Mark

PS. here's the script rewritten for 4 CPUs:
-------------
#!/bin/sh

[ -z "$NCPU" ] && NCPU=4
[ -z "$COLS" ] && COLS=1
[ -z "$ROWS" ] && ROWS=64

echo $COLS $ROWS > syncfile
rm -f pp

while [ "$NCPU" -gt 0 ]
do
         echo "running proc $NCPU"
         rpiece -v -PP pp -F syncfile @viewpoint @options @args &
         NCPU=`expr $NCPU - 1`
done
wait

rm -f syncfile pp

exit 0
-------------

On Wed, 23 Jul 2008, iebele wrote:

> Hi all,
>
> Does any of you wants to share an example of rpiece, using multiple (say 4) processes on a single machine, sharing 1 ambient file, resulting in 1 single image?
>
> The manpage gives this example:
>
> goober% echo 1 8 > syncfile
> goober% echo -F syncfile -x 1024 -y 1024 -vf view -o picture octree > args
> goo1ber% rpiece @args &
>
> How do I let rpiece run 4 processes simultaneous? Just run 4 processes in the background?
> How does an ambient file works using rpiece? Do I just need one, or as many as there are "pieces"?
> Where are temporary files stored, so I can check their progress?
>
> -Iebele