#!/bin/bash
echo "Identified $1 with ${width} width and ${height} height."
size=32
convert -rotate 90 -resize 32x32 "$1" 64.png
filename="64.png"
width=$(identify 64.png | cut -d' ' -f 3 | cut -d 'x' -f 1)
width=$(echo 10*${width}-8 | bc)
height=$(identify 64.png | cut -d' ' -f 3 | cut -d 'x' -f 2)
height=$(echo 10*${height}-8 | bc)
curx=0
cury=0
chx=5
chy=7

while true; do
	let curx=curx+chx
	let cury=cury+chy
	if [[ ${curx} -gt ${width} || ${curx} -lt 0 ]]; then
		let chx=-1*chx
		let curx=curx+2*chx
	fi
	if [[ ${cury} -gt ${height} || ${cury} -lt 0 ]]; then
    let chy=-1*chy
    let cury=cury+2*chy
  fi
	echo "${curx} ${chx} ${cury} ${chy}"
	actx=$(echo ${curx}/10 | bc)
	acty=$(echo ${cury}/10 | bc)
	pixelstring=$(convert -crop 8x8+${actx}+${acty} "${filename}" rgb:- | xxd -ps | sed 's/\(......\)/#\1/g' | tr '[:lower:]' '[:upper:]' | tr -d '\n')
	mosquitto_pub -h raum.ctdo.de -t 'homie/pixelbox/pixel/pixels/set' -m "${pixelstring}"
	sleep 0.1
done