turn TTF + text into a a toolpath

gistfile1.txt

node text2gcode.js --font=/Users/tmpvar/Desktop/sg12-webfont.ttf "hello world"

text2gcode.js

var opentype = require('opentype.js');
var argv = require('optimist').argv;
var gcanvas = require('gcanvas');

var text = argv._[0];
var fontFile = argv.font;
var size = text
var ctx = new (require('gcanvas'));
var fontsize =  argv.fs || 30;

var TAU = Math.PI*2;

var defined = function(a) {
  return typeof a !== 'undefined';
}

opentype.load(argv.font, function(err, font) {
  if (err) {
    throw err;
  }

  ctx.depth = argv.depth || -5;
  ctx.depthOfCut = argv.pass || .1;

  ctx.scale(argv.mirror ? 1 : -1, 1)
  ctx.toolDiameter = argv.diameter || 1.6;

  var width = 0;
  font.forEachGlyph(text + ' ', 0, 0, fontsize, null, function(glyph, x, y) {
    width = x;
  });

  var x = defined(argv.x) ? argv.x : 0;
  var y = defined(argv.y) ? argv.y : 0;


  ctx.translate((argv.mirror ? 0 : -width) + x, fontsize + y);
  var path = font.getPath(text, 0, 0, fontsize, null);

  argv.rotate && ctx.rotate(TAU * parseFloat(argv.rotate))

  if (argv.stroke) {
    path.lineWidth = parseInt(argv.stroke);
    path.stroke = 'black'
  } else {
    path.stroke = null;
  }

  if (!defined(argv.fill) || argv.fill) {
    path.fill = 'black';
  } else {
    path.fill = null;
  }

  path.draw(ctx);
});