#!/bin/bash

#file number to start with
COUNT=1

# total number of original files
OTOTAL=99

# loop to call up the files to process. calls up files numbered from 000-999 in accending order
while [ $COUNT -le $OTOTAL ]; do

if [ $COUNT -le $OTOTAL ]; then
    VAR=`printf "%03d" $COUNT`

fi 

#creates two 720x333 composites of two images with an overlap in the middle, source files must be 420x333, 
# the creation of the mask described in the parent doc.

convert altona/$VAR.jpg -extent 720x333 contain/$VAR.jpg overlap_mask.png  -gravity East -composite -limit area 8192 -limit memory 8192 over_$VAR.jpg

convert hans/$VAR.jpg -extent 720x333 platte/$VAR.jpg overlap_mask.png  -gravity East -composite -limit area 8192 -limit memory 8192 over2_$VAR.jpg

#attaches one of the above files to the bottom of the other with an overlap between them.

convert over_$VAR.jpg  -extent 720x576  over2_$VAR.jpg overlap_mask_total.png  -gravity South -composite -limit area 8192 -limit memory 8192 overlap_$VAR.jpg

echo $VAR

#add 1 to the number of the last runthrough
let COUNT=COUNT+1

done