animation/numbers/index.js

'use strict';

const { ArgumentParser } = require('argparse');
const { version, description } = require('./package.json');
const hershey = require('hersheytext');
const { writeFile } = require('fs-extra');
const { basename } = require('path');

const footer = '</svg>';
const W = 107;
const H = 99;
const charW = 3.25; //mm
const charH = 4.0; //mm
const header = `<svg xmlns="http://www.w3.org/2000/svg" 
xmlns:xlink="http://www.w3.org/1999/xlink"
height="${H}mm"
width="${W}mm" 
viewBox="0 0 ${W} ${H}"
version="1.1">`;


let options = {
	font : 'ems_nixish',
	scale : 0.005,
	weight : 1
};

async function loadFont (fontPath) {
	let str;
	let fileName;
	let fontName;
	try {
		hershey.addSVGFont(fontPath);
	} catch (err) {
		console.error(err);
		process.exit(1);
	}
	fileName = basename(fontPath);
	fontName = fileName.split('.').slice(0, -1).join('.');
	options = { font : fontName };
}

function textPos (str) {
	const UNIT = 21000 / W;
	const len = str.length;
	const w = len * charW;
	const h = charH;
	const x = ((W - w) / 2.0) * UNIT;
	const y = 1 * UNIT; 
	return { x, y };
}

async function main () {
	const fontPath = args.font;
	const num = (args.number + '').replace('\\n', '\n');
	const size = args.size || '8.5x11';
	const output = args.output || `number_${num}.svg`;
	let data;

	//console.log(num)

	try {
		//await loadFont(fontPath);
	} catch (err) {
		console.error(err);
	}

	//options.pos = { x: 50, y: 50 };
	options.pos = textPos(num);

	data = hershey.renderTextSVG(num, options);

	try {
		await writeFile(output, `${header}\n${data}\n${footer}`);
	} catch (err) {
		console.error(err);
	}
}

const parser = new ArgumentParser({
	description
});

parser.add_argument('-v', '--version', { action: 'version', version });
parser.add_argument('-f', '--font', { help: 'Path to font' });
parser.add_argument('-n', '--number', { help: 'Number to write' });
parser.add_argument('-o', '--output', { help: 'Output svg' });

const args = parser.parse_args();

main();