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#!/bin/sh
if [ x"$3" = x ]; then
echo "usage: $0 ifile ofile regions"
echo "The regions specification should be in physical coords and can be:"
echo " a region string e.g. 'circle 512 512 .1;box(606,606,3,4)'"
echo " a region file e.g. 'foo.reg' (nb: s9 file OK, but no @ prefix)"
exit 1
fi
# input parameters
IFILE=$1
OFILE=$2
REGIONS=$3
# temporary fits file
TFITS=./tfunstack.fits
rm -f ${TFITS}
# temporary funcalc command file
TFC=./tfunstack.fc
rm -f ${TFC}
# convert file to region string, if necessary
if [ -r "${REGIONS}" ]; then
REGIONS=`cat ${REGIONS} | awk '{print $0";"}'`
fi
# generate the funcalc command file from region string
# we do this so that awk can parse the region and add in the region centers
echo "${REGIONS}" | \
sed '/^physical/d;s/[\(\),]/ /g' | \
sed '/^#/d;/^global/d' | \
awk 'BEGIN{RS=";"};
BEGIN{
print "local"
print "int nreg;"
print "int xdim, ydim;"
print "double xmin, xmax, umin, ymax;"
print "double xref, yref;"
print "double xreg[1024], yreg[1024];"
print "end"
print "before"
print "FunInfoGet(fun, FUN_SECT_DIM1, &xdim, FUN_SECT_DIM2, &ydim, 0);"
print "FunInfoGet(fun, FUN_MIN1, &xmin, FUN_MAX1, &xmax, 0);"
print "FunInfoGet(fun, FUN_MIN2, &ymin, FUN_MAX2, &ymax, 0);"
print "xref = (xmin + xmax)/2.0;"
print "yref = (ymin + ymax)/2.0;"
i=1
};
{
if( ($1!="polygon") && ($1!="pie") ){
if( ($2 != "") && ($3 != "") ){
print "xreg["i"]="$2";"
print "yreg["i"]="$3";"
i = i+1
}
if( i >= 1024 ){
printf "ERROR: too many regions (1024 max)" > "dev/stderr"
exit
}
}
}
END{
print "nreg="i-1";"
print "end"
print "if( cur->region > nreg ){"
print " gerror(stderr, \"%d exceeds input reg %d\\n\", cur-> region, nreg);"
print " exit(1);"
print "}"
print "cur->x = cur->x - xreg[cur->region] + xref;"
print "cur->y = cur->y - yreg[cur->region] + yref;"
}' > ${TFC}
# funtools seems to rearrange the order of columns when $REGION is specified
# so here we get the column names explicitly to preserve order
COLS=`funhead ${IFILE} | egrep 'TTYPE[0-9]' | awk '{print $3}' | sed "s/'//g"`
# first filter the input file and preserve the region ids
funtable ${IFILE}"[${REGIONS}]" ${TFITS} "${COLS} "'$REGION'
# now run the funcalc script to stack the events
funcalc -f ${TFC} ${TFITS} ${OFILE}
# clean up
rm -f ${TFC} ${TFITS}
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