// http://codingtra.in

// http://patreon.com/codingtrain

// Plinko

// Video 1: https://youtu.be/KakpnfDv_f0

// Video 2: https://youtu.be/6s4MJcUyaUE

// Video 3: https://youtu.be/jN-sW-SxNzk

// Video 4: https://youtu.be/CdBXmsrkaPs

​

function Particle(x, y, r) {

  this.hue = random(360);

  var options = {

    restitution: 0.5,

    friction: 0,

    density: 1

  }

  x += random(-1, 1);

  this.body = Bodies.circle(x, y, r, options);

  this.body.label = "particle";

  this.r = r;

  World.add(world, this.body);

}

​

Particle.prototype.isOffScreen = function() {

  var x = this.body.position.x;

  var y = this.body.position.y;

  return (x < -50 || x > width + 50 || y > height);

}

​

Particle.prototype.show = function() {

  fill(this.hue, 255, 255);

  noStroke();

  var pos = this.body.position;

  push();

  translate(pos.x, pos.y);

  ellipse(0, 0, this.r * 2);

  pop();

}