// Daniel Shiffman

// https://thecodingtrain.com/CodingChallenges/124-flocking-boids.html

// https://youtu.be/mhjuuHl6qHM

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// Note: Use chrome for the best performance

​

const flock = [];

​

let alignSlider, cohesionSlider, separationSlider;

​

let quadTree;

​

function setup() {

  createCanvas(640, 480);

  quadTree = new QuadTree(Infinity, 30, new Rect(0, 0, width, height));

  alignSlider = createSlider(0, 2, 1, 0.1);

  cohesionSlider = createSlider(0, 2, 1, 0.1);

  separationSlider = createSlider(0, 2, 1.25, 0.1);

  for (let i = 0; i < 500; i++) {

    flock.push(new Boid());

  }

}

​

function draw() {

  quadTree.clear();

  for (const boid of flock) {

    quadTree.addItem(boid.position.x, boid.position.y, boid);

  }

  background(51);

  quadTree.debugRender();

  for (const boid of flock) {

    boid.edges();

    boid.flock(flock);

    boid.update();

    boid.show();

  }

}

​