shadertoy

#!/usr/bin/env bash

#! nix-shell -pi bash
#! nix-shell "python3.withPackages (p:[p.pyopengl p.pyside2 p.qtpy p.numpy])"
#! nix-shell "qt5.env \"qt-minimal${qt5.qtbase.version}\" []"
#! nix-shell jq curl

set -e
shopt -s nullglob

if [[ $1 =~ ^[a-zA-Z0-9]+$ ]]; then
	id=$1
elif [[ $1 =~ ^(https?://)?(www.)?shadertoy.com/view/([a-zA-Z0-9]+)$ ]]; then
	id=${BASH_REMATCH[3]}
	echo $id
else
	echo what
	exit 1
fi

key=Bt8K4N

mkdir -p shader/shadertoy

F=( ./shader/shadertoy/"${id}"_*.f )

j() {
	jq -r .Shader"$1" <<< $json
}

if ! [ "${F[*]}" ]; then
	json=$(curl "https://www.shadertoy.com/api/v1/shaders/$id?key=$key")
	[ "$json" ] && [ "$(j .Error)" == null ]
	name=$(j .info.username)_$(j .info.name)
	name=${name// /_}
	name=${name//\//_}

	F=( "./shader/shadertoy/${id}_$name.f" )

	{
		echo "// Created by $(j .info.username) in $(date -Idate -ud "+@$(j .info.date)")"
		echo "// https://www.shadertoy.com/view/$id"
		echo '#include "../shadertoy.h"'
		echo 
		j '.renderpass[0].code'
	} > ${F[0]}
fi

echo "${F[0]}"
./machuchu "${F[0]}"