is there a method to draw/fill a rounded rectangle?

@Andreas_Rozek - this is my function, implementing an Andres circle. Heavily based on example implementations on French Wikipedia .

I think it can probably be optimised more, and ultimately I also want to draw this a bit at a time. My best approach to that so far is having an array per octant and pushing/unshifting on each iteration for each circle so that I can step through later, but I think I can improve on that.

I spent a lot of thinking about allocating a fixed length array for the coordinates, but I've come to the conclusion that it isn't possible to know the length a priori (at least, I think that is the case).

const drawThickRing = function (x_centre, y_centre, r, thickness) {
  // Uses the Andres circle drawing algorithm to draw a ring
  // with outer radius r and a specified thickness.

  var x, y, d;
  for (let t = 0; t < thickness; t++) {
    r--;
    x = 0;
    y = r;
    d = r - 1;

    while (y >= x) {
      g.setPixel(x_centre + x, y_centre - y);
      g.setPixel(x_centre + y, y_centre - x);
      g.setPixel(x_centre + y, y_centre + x);
      g.setPixel(x_centre - x, y_centre + y);
      g.setPixel(x_centre + x, y_centre + y);
      g.setPixel(x_centre - y, y_centre + x);
      g.setPixel(x_centre - y, y_centre - x);
      g.setPixel(x_centre - x, y_centre - y);

      if (d >= 2 * x) {
        d -= 2 * x + 1;
        x++;
      } else if (d < 2 * (r - y)) {
        d += 2 * y - 1;
        y--;
      } else {
        d += 2 * (y - x - 1);
        y--;
        x++;
      }
    }
  }
};

drawThickRing(85, 85, 70, 10);