rechenwesen-animate

#!/bin/bash
# Makes the rechenwesen read the string you want it to

[[ $# -lt 1 ]] && exit 5

cd $(dirname $0)

MESSAGE="x   $@"
FONT=$(pwd)/nanotype.ttf
BASE_GIF=$(pwd)/rechenwesen.gif
TMP_DIR=$(mktemp -d /tmp/rechenwesen-XXXXXXXX)

MSG_W=12
MSG_H=8
MSG_X=10
MSG_Y=10

cd "$TMP_DIR"
convert "$BASE_GIF" "tmp.png"

# Flatten PNG layers
for i in {1..16}; do
    convert tmp-0.png tmp-$i.png -flatten flat-$i.png
done

IMG_TMP=tmp-text.png
convert -background white -font "$FONT" -pointsize 16 label:"$MESSAGE" "$IMG_TMP"
w=$(identify -format "%w" "$IMG_TMP")

for i in $(seq 5 $((w+MSG_W-2))); do
    convert -background white -font "$FONT" -pointsize 16 label:"$MESSAGE" -crop 12x10+$i+5 text-$i.png
    convert -page +0+0 flat-16.png -page +10+10 text-$i.png -flatten end-$i.png
done

tmpin1=
for i in {1..16}; do
    tmpin1="$tmpin1 flat-$i.png"
done

tmpin2=
for i in $(seq 0 $((w-1))); do
    tmpin2="$tmpin2 end-$i.png"
done

tmpin3=
for i in {16..1}; do
    tmpin3="$tmpin3 flat-$i.png"
done

convert $tmpin1 $tmpin2 $tmpin3 end.gif

# eog end.gif
echo $TMP_DIR