// https://thecodingtrain.com/CodingChallenges/034-dla

​

let tree = [];

let walkers = [];

//var r = 4;

let maxWalkers = 50;

let iterations = 1000;

let radius = 8;

let hu = 0;

let shrink = 0.995;

​

function setup() {

  frameRate(500);

  createCanvas(windowWidth, windowHeight);

  colorMode(HSB);

​

  tree[0] = new Walker(width / 2, height / 2);

  radius *= shrink;

  for (var i = 0; i < maxWalkers; i++) {

    walkers[i] = new Walker();

    radius *= shrink;

  }

}

​

function draw() {

  background(0);

  for (let x = 0; x < 10; x++) {

    for (let i = 0; i < tree.length; i++) {

    tree[i].show();

  }

​

  for (let i = 0; i < walkers.length; i++) {

    walkers[i].show();

  }

​

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

    for (let i = walkers.length - 1; i >= 0; i--) {

      walkers[i].walk();

      if (walkers[i].checkStuck(tree)) {

        walkers[i].setHue(hu % 360);

        hu += 2;

        tree.push(walkers[i]);

        walkers.splice(i, 1);

      }

    }

  }

​

  var r = walkers[walkers.length - 1].r;

  while (walkers.length < maxWalkers && radius > 1) {

    radius *= shrink;

    walkers.push(new Walker());

  }

  }

​

}