Note: All the computers must have a common file system (that is, they all
see the same directory where you are starting the rendering) and you should
be able to rsh to all of them without password prompting. These usually
occur only in local networks (so this script cannot be used, at least not
unmodified, to distribute the rendering over the world).
  Put the names of the machines in the HOSTS variable at the beginning and
the correct number of them in the HOSTSCNT (I know that it may be possible
to automatically count the number of words in HOSTS but I was lazy and didn't
search for info about how to do it).


#!/bin/zsh

POVEXEC=$HOME/povray/xmegapov
ROWSPERHOST=17
HOSTSCNT=3
HOSTS=(machine1 machine2 machine3)

### If this is a child process

if [ "$1" = "__SubProc__" ]
then
    echo "### Subprocess at `uname -n` starting rendering. (`uptime | sed
's/^.*average: //'`)"

    PART=$2
    FILE=$3
    WIDTH=$4
    HEIGHT=$5
    shift 5

    let STARTROW=PART*ROWSPERHOST
    while [ $STARTROW -le $HEIGHT ]
    do
	let ENDROW=STARTROW+ROWSPERHOST-1
	echo `uname -n` rendering lines $STARTROW to $ENDROW

	$POVEXEC -i $FILE $* -w$WIDTH -h$HEIGHT +sr$STARTROW +er$ENDROW -d -p -v +ft -o
ImagePart`printf "%05i" $STARTROW` >&/dev/null

	let STARTROW+=ROWSPERHOST*HOSTSCNT
    done

    echo "### `uname -n` done."

    exit
fi

### Else this is the main process

if [ "$3" = "" ]
then
    echo "Usage: $0 <pov-file> <width> <height> [<additional pov options>]"
    exit
fi

PART=0
for HOST in $HOSTS
do
    rsh $HOST "cd `pwd`; $0 __SubProc__ $PART $*" &
    PART=$[PART+1]
done
wait

echo "Joining image parts..."
if [ `echo $1 | grep -c '\.pov$'` = 1 ]
then
    IMAGE=`echo $1 | sed 's/\.pov$/.tga/'`
else
    IMAGE="$1".tga
fi

mv ImagePart00000.tga $IMAGE
for FILE in ImagePart?????.tga
do
    tail +19c $FILE >> $IMAGE
done

rm ImagePart?????.tga

echo "Done."


-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

Post a reply to this message