animation/stipple.sh

#!/bin/bash

###########################
#
# Run the stipple_gen script on a sequence
# of PNG images and then render the resulting
# preview images into a video.
#
###########################

if [[ "${1}" == "" ]]; then
	echo "Please provide a directory of images as the first argument"
	exit 1
fi

INPUT=`realpath "${1}"`
OUTPUT=`realpath "${2}"`
INVERT="${3}"

if [ ! -d "${INPUT}" ]; then
	echo "Directory ${1} doesn't exist"
	exit 2
fi

mkdir -p "${OUTPUT}"

FRAMERATE=12
WIDTH=404
HEIGHT=374
DOTSIZE=6
MAXGENERATIONS=50
MAXPARTICLES=900
MINDOTSIZE=0.5
LINE=0.5
FILL=true
MODE="stipple" #stipple/tsp

if [[ "${INVERT}" == "" ]]; then
	INVERT="false"
fi

IMAGES=""

#files in dir
for png in "${INPUT}/"*.png ; do
	filename=`basename "${png}"`
	name=`echo "${filename}" | cut -d'.' -f1`
	num=`echo "${name}" | awk -F'_' '{print $(NF)}'`
	tmp=`mktemp`.png
	bash white.sh "${png}" "${tmp}"
	cd ~/src/stipple_gen/
	if [ "${IMAGES}" == "" ]; then
		part=`echo "${name}" | awk -F'_0' '{print $1}'`
		IMAGES="${OUTPUT}/${part}_%06d_rendered.png"
		VIDEO="${OUTPUT}/${part}.mov"
	fi
	bash stipple_gen.sh \
		--display "false" \
		--inputImage "${tmp}" \
		--outputImage "${OUTPUT}/${name}_rendered.png" \
		--outputSVG "${OUTPUT}/${name}.svg" \
		--canvasWidth $WIDTH \
		--canvasHeight $HEIGHT \
		--dotSizeFactor $DOTSIZE \
		--windowWidth $WIDTH \
		--windowHeight $HEIGHT \
		--maxGenerations $MAXGENERATIONS \
		--minDotSize $MINDOTSIZE \
		--line $LINE \
		--fill $FILL \
		--maxParticles $MAXPARTICLES \
		--mode $MODE \
		--invert $INVERT

	if [[ "${INVERT}" != "false" ]]; then
		convert "${OUTPUT}/${name}_rendered.png" -channel RGB -negate "${OUTPUT}/${name}_rendered.png"
	fi

	rm "${tmp}"
	cd ~/src/animation/

	if [ "${MODE}" != "tsp" ]; then
		opt=`mktemp`.svg
		svgsort "${OUTPUT}/${name}.svg" "${opt}"
		mv "${opt}" "${OUTPUT}/${name}.svg"
	fi
done

ffmpeg -y -r ${FRAMERATE} -f image2 -i "${IMAGES}" \
	-c:v prores_ks -profile:v 3 \
	"${VIDEO}"