Silly hack to get svgopt to run without erroring out.

for.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+LAST=$1
+
+PI=3.14159265359
+FPS=24
+MULTIPLE=3
+STEP=$(echo "scale=6;360/45" | bc -l)
+AMP=1.0
+STARTANGLE=270
+
+DOTSIZE_MIN=2
+DOTSIZE_MAX=6
+DOTSIZE_HALF=`echo "scale=6;($DOTSIZE_MAX - $DOTSIZE_MIN) / 2" | bc`
+DOTSIZE=`echo "scale=6;($DOTSIZE_MIN + $DOTSIZE_HALF)" | bc`
+DOTSIZE_MULTIPLE=$DOTSIZE_HALF
+
+PARTICLES_MIN=300
+PARTICLES_MAX=550
+PARTICLES_HALF=`echo "($PARTICLES_MAX - $PARTICLES_MIN) / 2" | bc`
+PARTICLES=$((PARTICLES_MIN+PARTICLES_HALF))
+PARTICLES_MULTIPLE=$PARTICLES_HALF
+
+fluctuation () {
+	i=$1
+	ANGLE=$(echo "scale=6;$STARTANGLE+($i * $STEP)" | bc)
+	FLUCTUATION=$(echo "scale=6;s($ANGLE*($PI/180))*$AMP" | bc -l)
+	echo $FLUCTUATION
+}
+
+i=0
+
+while [ $i -lt $LAST ]; do
+	FLUCTUATION=$(fluctuation $i)
+	REALTIME=$(echo "scale=1;($i*$MULTIPLE)/$FPS" | bc -l)
+	echo "[${i}] $((i*MULTIPLE)) $REALTIME: ${FLUCTUATION}"
+	fluc=`fluctuation $i`
+	particles=`echo "scale=0;($PARTICLES-($fluc*$PARTICLES_MULTIPLE))/1" | bc`
+	dotsize=`echo "scale=6;$DOTSIZE+($fluc*$DOTSIZE_MULTIPLE)" | bc`
+	echo $fluc 
+	echo $particles
+	echo $dotsize
+	i=$((i+1))
+done

seq.sh

@@ -7,7 +7,7 @@
 #
 ###########################
 
-MULTIPLE=3
+MULTIPLE=2
 FPS=24
 RATE=`echo "scale=0;${FPS}/${MULTIPLE}" | bc`
 TIMESTR=""

stipple.sh

@@ -25,7 +25,7 @@ fi
 
 mkdir -p "${OUTPUT}"
 
-MULTIPLE=3
+MULTIPLE=2 
 FPS=24
 RATE=`echo "scale=0;${FPS}/${MULTIPLE}" | bc`
 
@@ -74,7 +74,10 @@ stipple () {
 
 	if [ "${MODE}" != "tsp" ]; then
 		opt=`mktemp`.svg
+		CURRENT=$(pwd)
+		cd /
 		svgsort "${OUTPUT}/${name}.svg" "${opt}"
+		cd $CURRENT
 		mv "${opt}" "${OUTPUT}/${name}.svg"
 	fi
 }

stipple_sine.sh

@@ -0,0 +1,141 @@
+#!/bin/bash
+
+###########################
+#
+# Run the stipple_gen script on a sequence
+# of PNG images and then render the resulting
+# preview images into a video. Fluctuate settings
+# via a sine wave.
+#
+###########################
+
+if [[ "${1}" == "" ]]; then
+	echo "Please provide a directory of images as the first argument"
+	exit 1
+fi
+
+INPUT=`realpath "${1}"`
+OUTPUT=`realpath "${2}"`
+CONFIG="${3}"
+SINGLE="${4}"
+
+if [ ! -d "${INPUT}" ]; then
+	echo "Directory ${1} doesn't exist"
+	exit 2
+fi
+
+mkdir -p "${OUTPUT}"
+
+PI=3.14159265359
+FPS=24
+MULTIPLE=2
+STEP=$(echo "scale=6;360/45" | bc -l)
+AMP=1.0
+STARTANGLE=270
+
+RATE=`echo "scale=0;${FPS}/${MULTIPLE}" | bc`
+
+WIDTH=404
+HEIGHT=374
+
+DOTSIZE_MIN=1.8
+DOTSIZE_MAX=6
+DOTSIZE_HALF=`echo "scale=6;($DOTSIZE_MAX - $DOTSIZE_MIN) / 2" | bc`
+DOTSIZE=`echo "scale=6;($DOTSIZE_MIN + $DOTSIZE_HALF)" | bc`
+DOTSIZE_MULTIPLE=$DOTSIZE_HALF
+PARTICLES_MIN=300
+PARTICLES_MAX=650
+PARTICLES_HALF=`echo "($PARTICLES_MAX - $PARTICLES_MIN) / 2" | bc`
+PARTICLES=$((PARTICLES_MIN+PARTICLES_HALF))
+PARTICLES_MULTIPLE=$PARTICLES_HALF
+
+if [[ "${CONFIG}" == "" ]]; then
+	echo "Please provide a config file"
+	exit 1
+fi
+
+IMAGES=""
+
+fluctuation () {
+	i=$1
+	ANGLE=$(echo "scale=6;$STARTANGLE+($i * $STEP)" | bc)
+	FLUCTUATION=$(echo "scale=6;s($ANGLE*($PI/180))*$AMP" | bc -l)
+	echo $FLUCTUATION
+}
+
+stipple () {
+	png="${1}"
+	frame="${2}"
+	filename=`basename "${png}"`
+	name=`echo "${filename}" | cut -d'.' -f1`
+	num=`echo "${name}" | awk -F'_' '{print $(NF)}'`
+	tmp=`mktemp`.png
+	fluc=`fluctuation $frame`
+	particles=`echo "scale=0;($PARTICLES-($fluc*$PARTICLES_MULTIPLE))/1" | bc`
+	dotsize=`echo "scale=6;$DOTSIZE+($fluc*$DOTSIZE_MULTIPLE)" | bc`
+	#echo $fluc 
+	echo "maxParticles: $particles"
+	echo "dotSizeFactor: $dotsize"
+
+	bash white.sh "${png}" "${tmp}"
+
+	source "${CONFIG}"
+
+	cd ~/src/stipple_gen/
+	bash stipple_gen.sh \
+		--inputImage "${tmp}" \
+		--outputImage "${OUTPUT}/${name}_rendered.png" \
+		--outputSVG "${OUTPUT}/${name}.svg" \
+		--config "${CONFIG}" \
+		--dotSizeFactor $dotsize \
+		--maxParticles $particles
+
+	if [[ "${invert}" == "true" ]]; then
+		convert "${OUTPUT}/${name}_rendered.png" -channel RGB -negate "${OUTPUT}/${name}_rendered.png"
+	fi
+
+	rm "${tmp}"
+	cd ~/src/animation/
+
+	if [ "${MODE}" != "tsp" ]; then
+		opt=`mktemp`.svg
+		CURRENT=$(pwd)
+		cd /
+		svgsort "${OUTPUT}/${name}.svg" "${opt}"
+		cd $CURRENT
+		mv "${opt}" "${OUTPUT}/${name}.svg"
+	fi
+}
+
+if [[ "${SINGLE}" != "" ]]; then 
+	i=0;
+	echo "Rendering a single frame, #${SINGLE}"
+	#files in dir
+	for png in "${INPUT}/"*.png ; do
+		if [[ ${i} -eq ${SINGLE} ]]; then
+			stipple "${png}" ${i}
+			break
+		fi
+		i=$((i+1))
+	done
+
+	exit
+fi
+
+i=0;
+#files in dir
+for png in "${INPUT}/"*.png ; do
+	stipple "${png}" ${i}
+	i=$((i+1))
+done
+
+if [[ "${IMAGES}" == "" ]]; then
+	part=`echo "${name}" | awk -F'_0' '{print $1}'`
+	IMAGES="${OUTPUT}/${part}_%06d_rendered.png"
+	VIDEO="${OUTPUT}/${part}.mov"
+fi
+
+ffmpeg -y -r ${RATE} -f image2 -i "${IMAGES}" \
+	-r ${FPS} \
+	-c:v prores_ks -profile:v 3 \
+	"${VIDEO}"