// Daniel Shiffman

// http://natureofcode.com

​

// Demonstration of Craig Reynolds' "Flocking" behavior

// See: http://www.red3d.com/cwr/

// Rules: Cohesion, Separation, Alignment

​

// Click mouse to add boids into the system

​

let flock;

​

let text;

​

function setup() {

  createCanvas(640, 360);

  createP("Drag the mouse to generate new boids.");

  flock = new Flock();

  // Add an initial set of boids into the system

  for (let i = 0; i < 60; i++) {

    let b = new Boid(width / 2, height / 2);

    flock.addBoid(b);

  }

}

​

function draw() {

  background(0);

  flock.run();

}

​

// Add a new boid into the System

function mouseDragged() {

  flock.addBoid(new Boid(mouseX, mouseY));

}