Add invert option to stipple

draw.sh

@@ -1,6 +1,9 @@
 #!/bin/bash
 
-#field guide
+if [[ "${1}" == "" ]]; then
+	echo "Please provide a directory as the first argument"
+	exit 1
+fi
 
 if [ "${2}" == "" ]; then
 	name=`basename "${1}"`

image_seq.sh

@@ -1,15 +1,24 @@
 #!/bin/bash
 
+MULTIPLE=2
+RATE=`echo "scale=0;24/${MULTIPLE}" | bc`
+
 INPUT="${1}"
 OUTPUT="${2}"
+INVERT="${3}"
 
 WIDTH=323
 HEIGHT=242
 
+if [[ "${INVERT}" != "" ]]; then
+	INVERT="-vf negate"
+fi
+
 mkdir -p "${OUTPUT}"
 
 ffmpeg 	-re -i "${INPUT}" \
 	-f image2 \
-	-r 12 \
+	-r ${RATE} \
+	"${INVERT}" \
 	-vf crop=in_h/3*4:in_h,scale=$WIDTH:$HEIGHT,setsar=1:1 \
 	"${OUTPUT}/image_%06d.png"

stipple.sh

@@ -2,6 +2,13 @@
 
 INPUT=`realpath "${1}"`
 OUTPUT=`realpath "${2}"`
+INVERT="${3}"
+
+if [[ "${INVERT}" == "" ]]; then
+	INVERT="false"
+else
+	INVERT="true"
+fi
 
 WIDTH=404
 HEIGHT=374
@@ -42,7 +49,8 @@ for png in "${INPUT}/"*.png ; do
 		--line $LINE \
 		--fill $FILL \
 		--maxParticles $MAXPARTICLES \
-		--mode $MODE
+		--mode $MODE \
+		--invert $INVERT
 	rm "${tmp}"
 	cd ~/src/animation/
 	if [ "${MODE}" != "tsp" ]; then