// Daniel Shiffman

// http://natureofcode.com

​

// Attraction Array with Oscillating objects around each Crawler

​

// Click and drag attractive body to move throughout space

​

let crawlers = [];

let a;

​

function setup() {

  createCanvas(640, 360);

  // Some random bodies

  for (let i = 0; i < 6; i++) {

    crawlers[i] = new Crawler();

  }

  // Create an attractive body

  a = new Attractor(createVector(width / 2, height / 2), 20, 0.4);

}

​

function draw() {

  background(220);

  a.rollingover(mouseX, mouseY);

  a.go();

​

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

    // Calculate a force exerted by "attractor" on "Crawler"

    let f = a.attract(crawlers[i]);

    // Apply that force to the Crawler

    crawlers[i].applyForce(f);

    // Update and render

    crawlers[i].update();

    crawlers[i].display();

  }

​

​

}

​

function mousePressed() {

  a.clicked(mouseX, mouseY);

}

​

function mouseReleased() {

  a.stopDragging();

}