leaftest/mapper.sh

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#!/bin/bash
MAPDIR=$1
SPAWNPOS=$2
DIMENSIONS=$3
if [ -z $MAPPERDIR ]; then
MAPPERDIR=.
fi
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mapperpath=$MAPPERDIR/minetestmapper
if [ ! -f $mapperpath ]; then
echo "Error, "$mapperpath" doesn't exist."
echo "Please specify the path to the minetestmapper executable via the MAPPERDIR variable"
exit 1
fi
if [ -z "$JOBNUM" ]; then
JOBNUM=1
fi
case "$JOBNUM" in
''|*[!0-9]*) echo "Bad number of jobs '$JOBNUM'. Please specify a positive integer." ; exit 1 ;;
*) ;;
esac
# echo "Number of jobs: $JOBNUM"
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prefix_func="\
prefix() { \
while read line ; do \
echo \"\${1}\${line}\"; \
done \
}"
# retains || usage when doing | prefix "sth"
# use it when needed
prefix_pipefail="\
set -o pipefail ; \
$prefix_func"
# prefix should be usable within this script as well
eval $prefix_func
#sh -c "$prefix_func ; echo -e 'a\nb\nc\n' | prefix 'PREF '"
#bash -c "$prefix_pipefail ; (echo -e 'a\nb\nc\n' ; false) | prefix 'PREF '" || echo "ERR"
#exit 1
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scriptdir=`readlink -f $0`
scriptdir=`dirname $scriptdir`
tiledir=$scriptdir/www/tiles
spawnx=${SPAWNPOS%%,*}
spawny=${SPAWNPOS##*,}
#echo "spawn position: $spawnx $spawny"
tilesize=256
zoomlevelnum=3
tilenum=$(($DIMENSIONS/$tilesize))
mkdir -p ${tiledir}/20
rm -f ${tiledir}/20/*
jobparam="-P$JOBNUM"
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#create tile images
for x in $(seq 0 $tilenum)
do
for y in $(seq 0 $tilenum)
do
posx=$(($spawnx+$tilesize*($x-$tilenum/2)))
posy=$(($spawny+$tilesize*($tilenum/2-$y)))
# Execute sh -c "something"
echo "-c"
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echo "$prefix_pipefail ; $mapperpath ${MAPPERPARAMS} -i ${MAPDIR} --geometry ${posx},${posy}+${tilesize}+${tilesize} -o ${tiledir}/20/map_${x}_${y}.png \
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2> >(>&2 prefix '[TILEGEN $x,$y ERR]: ') | prefix '[TILEGEN $x,$y]: ' \
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|| (>&2 echo 'minetesmapper for tile [${x},${y}] ended with non zero exit code'; exit 255)"
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done
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done | xargs -n2 $jobparam -d '\n' bash # bash required because of "set -o pipefail" usage
xargs_exit=$?
if [ $xargs_exit -ne 0 ]; then
# xargs unfortunately exits immediately, without even waiting for sub-processes
sleep 1
>&2 echo "Error: xargs ended with non-zero exit code $xargs_exit."
exit 1
fi
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#join the images and make them smaller
mult=1
for s in $(seq 1 $zoomlevelnum)
do
mult=$(($mult*2))
tnum=$(($tilenum/$mult-1))
zoomlevel=$((20-$s))
zoomlevelbefore=$((20-$s+1))
dir=$tiledir/$zoomlevel
dirb=$tiledir/$zoomlevelbefore
mkdir -p $dir
rm -f ${dir}/20/*
for x in $(seq 0 $tnum)
do
for y in $(seq 0 $tnum)
do
montage $dirb/map_$(($x*2))_$((y*2)).png $dirb/map_$(($x*2+1))_$((y*2)).png $dirb/map_$(($x*2))_$((y*2+1)).png $dirb/map_$(($x*2+1))_$((y*2+1)).png -geometry +0+0 $dir/map_${x}_${y}.png
if [ $? -ne 0 ]; then
echo "montage exited with non zero exit code, aborting."
exit 1
fi
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convert $dir/map_${x}_${y}.png -resize 50% $dir/map_${x}_${y}.png
if [ $? -ne 0 ]; then
echo "convert exited with non zero exit code, aborting."
exit 1
fi
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done
done
done
zoommin=$((20-$zoomlevelnum))
#write the resulting config into a json file
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echo "{\"mapsize\":$DIMENSIONS, \"spawn\":{\"x\":$spawnx,\"y\":$spawny}, \"zoommin\":$zoommin}" > $scriptdir/www/conf.json