Party

// By Roni Kaufman

// https://ronikaufman.github.io/

// https://twitter.com/KaufmanRoni

​

let gap = 8;

let margin = 50;

let squiggles = [];

let palette = ["#0077e1", "#f5d216", "#fc3503"];

let blackLines;

​

function setup() {

  createCanvas(500, 500);

  //noLoop();

  noStroke();

  background(250);

  blackLines = random() < 1/2;

  let circles = [];

  for (let i = 0; i < 100; i++) {

    let x = random(margin, width-margin);

    let y = random(margin, height-margin);

    let d = gap;

    let canAdd = true;

    for (let c of circles) {

      if (dist(x, y, c.x, c.y) < gap*2) {

        canAdd = false;

        break;

      }

    }

    if (canAdd) {

      if (blackLines) fill(random(palette));

      else fill(5);

      circle(x, y, d);

      circles.push(createVector(x, y));

    }

  }

  squiggles.push({

    circles: circles

  });

}

​

function draw() {

  let noAddition = true;

  for (let i = 0; i < 150; i++) {

    if (makeSquiggle()) {

      noAddition = false;

    }

  }

  if (noAddition) noLoop();

}

​

function makeSquiggle() {

  let squi = new Squiggle(random(margin, width-margin), random(margin, height-margin));

  while (squi.move());

  if (squi.circles.length > 5) {

    squiggles.push(squi);

    squi.draw();

    return true;

  }

  return false;

}

​

function Squiggle(x0, y0) {

  this.x = x0;

  this.y = y0;

  this.circles = [createVector(x0, y0)];

  this.d = 4;

  this.amp = random(2, 10);

​

  this.move = function() {

    let theta = atan2(this.y-height/2, this.x-width/2) + sin(dist(this.x, this.y, width/2, height/2)/this.amp);

    let r = 1;

    this.x += r * cos(theta);

    this.y += r * sin(theta);

    if (this.x < margin || this.x > width-margin || this.y < margin || this.y > height-margin) {

      return false;

    }

    let circ = createVector(this.x, this.y);

    for (let squi of squiggles) {

      for (let c of squi.circles) {

        if (circ.dist(c) < gap) return false;

      }

    }

    this.circles.push(circ);

    return true;

  }

​

  this.draw = function() {

    if (blackLines) fill(5);

    else fill(random(palette));

    let n = this.circles.length;

    for (let i = 0; i < n; i++) {

      let c = this.circles[i];

      circle(c.x, c.y, this.d);

    }

  }

}