Function pointAtLength

libraries/p5.js:29797–29830

(path, length, istotal)

}

function pointAtLength(path, length, istotal) {
  path = path2curve(path);
  var x, y, p, l, sp = '', subpaths = {}, point, len = 0;
  for (var i = 0, ii = path.length; i < ii; i++) {
    p = path[i];
    if (p[0] === 'M') {
      x = +p[1];
      y = +p[2];
    } else {
      l = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);
      if (len + l > length) {
        if (!istotal) {
          point = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5],
            p[6], length - len);
          return { x: point.x, y: point.y, alpha: point.alpha };
        }
      }
      len += l;
      x = +p[5];
      y = +p[6];
    }
    sp += p.shift() + p;
  }
  subpaths.end = sp;

  point = istotal ? len : findDotsAtSegment
    (x, y, p[0], p[1], p[2], p[3], p[4], p[5], 1);

  if (point.alpha) {
    point = { x: point.x, y: point.y, alpha: point.alpha };
  }

  return point;
}

function pathToAbsolute(pathArray) {