#!/bin/bash

height=`identify $2 | egrep -o [0-9]+x[0-9]+ | egrep -o '[0-9]+$'`
temp=$3
convert $2 $temp
old=$IFS
IFS=$'\n'
for line in $( cat "$1" )
do
count="0"
IFS=$old
for num in $( echo $line | egrep -o '[0-9]{2,5}' )
do
count=$(($count + 1))
case "$count" in
	1)
		ax="$num"
	;;
	2)
		ay=$(($height - $num))
	;;
	3)
		bx="$num"
	;;
	4)
		by=$(($height - $num))
	;;
	*)
		echo "hmmmm:$count:$num"
	;;
esac
done
convert $temp -stroke red -strokewidth 1 -draw "line $ax,$ay $bx,$ay" $temp
convert $temp -stroke red -strokewidth 1 -draw "line $ax,$ay $ax,$by" $temp
convert $temp -stroke red -strokewidth 1 -draw "line $bx,$by $bx,$ay" $temp
convert $temp -stroke red -strokewidth 1 -draw "line $bx,$by $ax,$by" $temp


IFS=$'\n'
done
IFS=$old