Split multi-edge drawing

split.sh

#!/bin/bash

image=/var/www/html/DucksManager-old/edges/se/elements/KAP.Fond-169-195.png
doubles=(181 188 194)
start=169
end=195

width=$(identify -format '%w' $image)
height=$(identify -format '%h' $image)
crop_size_single=$(echo "scale=3;$width/(${#doubles[@]}+1+$end-$start)" | bc)

echo $crop_size_single

dir=${image%/*}
i=$start
crop_x=0
for ((i=start; i<=end; i++)); do
  echo "Generating $i"
  # shellcheck disable=SC2199
  if [[ ${doubles[@]} =~ ${i} ]]; then
    crop_size=$(echo "scale=2;$crop_size_single*2" | bc)
  else
    crop_size=$crop_size_single
  fi
  convert $image -crop "${crop_size}x$height+$crop_x+0" "$dir/KAP.Fond.$i.png"
  crop_x=$(echo "scale=3;$crop_x+$crop_size" | bc)
done