code: function drawArc(a, b, c) {
    const orient = b.x * (c.y - a.y) + a.x * (b.y - c.y) + c.x * (a.y - b.y);
    const sweep = (orient > 0) ? 1 : 0;
    const size = Point.distance(b, a);
    return [a.x, a.y + 'A' + size, size, 0, sweep, 1, c.x, c.y].join(',');
  }
docs: ----------------------------------------------------------------------------- Utility Functions Draws an arc from a to c, with center b.