portals packed

let circles = [];
let nCircles = 7000;
function setup() {
  cnv = createCanvas(windowWidth, windowHeight);
  circles = [];
  rectMode(CENTER);
  nRot = int(random(1, 10));
  if (nRot === 4) {
    nRot = 3;
  }
  r = random(50, 100);
  g = random(50, 100);
  b = random(50, 100);
  noStroke();
  circles[0] = { r: random(width / 10, width / 8), x: 0, y: 0, pr: 0, pa: 0 };
  background(r, g, b);
  angleMode(DEGREES);
  cnt = 0;
  for (let j = 0; j < nCircles; j++) {
    x1 = random(-width / 2, width / 2);
    y1 = random(-height / 2, height / 2);
    minD = 10000000;
    n = -1000;
    inCirc = false;
    for (let i = 0; i < circles.length; i++) {
      d = dist(x1, y1, circles[i].x, circles[i].y);
      if (d > circles[i].r && minD > d - circles[i].r) {
        n = i;
        minD = d - circles[i].r;
      }
      if (d <= circles[i].r) {
        inCirc = true;
      }
    }
    if (!inCirc && n >= 0) {
      circles[cnt] = {
        r: min(minD, width / 5),
        x: x1,
        y: y1,
        pr: 0,
        pa: random(0, 360)
      };
      cnt++;
    }
  }

  fill(r + 100, g + 100, b + 100);
}

function draw() {
  translate(width / 2, height / 2);

  for (let i = 0; i < circles.length; i++) {
    if (
      dist(
        circles[i].x + circles[i].pr * cos(circles[i].pa),
        circles[i].y + circles[i].pr * sin(circles[i].pa),
        circles[i].x,
        circles[i].y
      ) < circles[i].r
    )
      circles[i].pr += randomGaussian(0.05, 0.1);
    circles[i].pa += random(-1, 2);
    push();
    translate(circles[i].x, circles[i].y);
    for (let k = 0; k < nRot; k++) {
      circle(
        circles[i].pr * cos(circles[i].pa + (k * 360) / nRot),
        circles[i].pr * sin(circles[i].pa + (k * 360) / nRot),
        random(0.1, 1)
      );
    }

    pop();
  }
}

function mousePressed() {
  frameCount = 0;
  setup();
  draw();
}

function keyPressed() {
  save(cnv, "packed", "png");
}

function windowResized() {
  resizeCanvas(windowWidth, windowHeight);
}