// http://codingtra.in

// http://patreon.com/codingtrain

// Code for: https://youtu.be/CKeyIbT3vXI

​

function Particle(x, y, hu, firework) {

  this.pos = createVector(x, y);

  this.firework = firework;

  this.lifespan = 255;

  this.hu = hu;

  this.acc = createVector(0, 0);

  if (this.firework) {

    this.vel = createVector(0, random(-12, -8));

//    this.vel = createVector(0, random(-20, -10));   // change PHIL

  } else {

    this.vel = p5.Vector.random2D();

    this.vel.mult(random(2, 10));

//    this.vel.mult(random(10, 20));                  // change KLL

  }

  this.applyForce = function(force) {

    this.acc.add(force);

  }

​

  this.update = function() {

    if (!this.firework) {

      this.vel.mult(0.9);

//      this.vel.mult(0.7);                          // test KLL

      this.lifespan -= 4;

    }

    this.vel.add(this.acc);

    this.pos.add(this.vel);

    this.acc.mult(0);

  }

​

  this.done = function() {

    if (this.lifespan < 0) {

      return true;

    } else {

      return false;

    }

  }

​

  this.show = function() {

    colorMode(HSB);

    if (!this.firework) {

      strokeWeight(2);

      stroke(hu, 255, 255, this.lifespan);

    } else {

      strokeWeight(4);

      stroke(hu, 255, 255);

    }

    point(this.pos.x, this.pos.y);

  }

}