// Daniel Shiffman

// http://natureofcode.com

​

let m;

let howMany;

​

function setup() {

  createCanvas(640, 360);

  m = [];

  howMany = 1

  for(let i=0; i<howMany; i++){

     m = new Mover();

  }

}

​

function draw() {

  background(51);

​

  let wind = createVector(0.01, 0);

  //let gravity = createVector(0, 0.1);

  //m.applyForce(gravity);

​

  for(let i=0; i<howMany; i++)

  {

  m[i].applyForce(wind);

  m[i].update();

  m[i].display();

  m[i].checkEdges();

  }

​

}

​

class Mover {

  constructor() {

    this.mass = 1;

    this.position = createVector(30, 30);

    this.velocity = createVector(0, 0);

    this.acceleration = createVector(0, 0);

  }

​

  applyForce(force) {

    var f = p5.Vector.div(force, this.mass);

    this.acceleration.add(f);

  }

​

  update() {

    this.velocity.add(this.acceleration);

    this.position.add(this.velocity);

    this.acceleration.mult(0);

  }

​

  display() {

    stroke(0);

    strokeWeight(2);

    fill(255, 127);

    ellipse(this.position.x, this.position.y, 48, 48);

  }

​

  checkEdges() {

    if (this.position.x > width) {

      this.position.x = width;

      this.velocity.x *= -1;

    } else if (this.position.x < 0) {

      this.velocity.x *= -1;

      this.position.x = 0;

    }

    if (this.position.y > height) {

      this.velocity.y *= -1;

      this.position.y = height;

    }

  }

​

}