animation/stipple_sine.sh

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#!/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
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MULTIPLE=3
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
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PARTICLES_MIN=200
PARTICLES_MAX=1000
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=$(pwd)
cd /
svgsort --no-adjust "${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}"