constructor() {

    this.detonator = undefined;

    this.exploded = false;

    this.done = false;

  }

​

  update() {

    if (!this.exploded) {

      this.missile.applyForce(gravity);

      this.missile.update();

​

      if (this.missile.vel.y >= 0) {

        this.exploded = true;

        this.explode();

      }

    } else if (!this.done) {

      this.detonator.update();

      if (this.detonator.done) {

        this.done = true;

      }

    }

  }

​

  show() {

    if (!this.exploded) {

      this.missile.show();

    } else {

      this.detonator.show();

    }

  }

}

​

class GenericFirework extends Firework {

  constructor() {

    super();

    this.missile = new Missile(random(width * 0.05, width * 0.95));

  }

​

  explode() {

    let d = random(detonatorClasses);

    this.detonator = new d(this.missile.pos.x, this.missile.pos.y);

    random(sounds).play(0.4);

  }

}

​

class LetterFirework extends Firework {

  constructor(x,letter) {

    super();

    this.letter = letter;

    this.missile = new Missile(x);

    this.missile.vel = createVector(0,startVel* random(0.98,1.02));

    if (letter == letters.Heart) {

      this.missile.vel = createVector(0,startVel* 0.78);

    }

    this.missile.acc = createVector(0,0);

  }

​

  explode() {

    this.detonator = new DetonatorLetter(

      this.missile.pos.x,

      this.missile.pos.y,

      this.letter

    );

    random(sounds).play(0.4);

  }

}

​

class Missile {

  constructor(x) {

    this.pos = createVector(x, height);

    this.vel = createVector(0, startVel * random(0.9, 1.1));

    this.acc = createVector(random(-0.5, 0.5), 0);

    this.hist = [];

    this.histlen = floor(random(8, 18));

  }

​

  applyForce(force) {

    this.acc.add(force);

  }

​

  update() {

    let x = this.pos.x;

    let y = this.pos.y;

    this.hist.push(createVector(x, y));

    if (this.hist.length > this.histlen) {

      this.hist.splice(0, 1);

    }

    this.vel.add(this.acc);

    this.pos.add(this.vel);

    this.acc.mult(0);

  }

​

  show() {

    for (let h of this.hist) {

      for (let i = 0; i < 2; i++) {

        strokeWeight(random(1, 2));

        stroke(random(5, 15), 80, random(65,100), 90);

        point(h.x + random(-1.5, 1.5), h.y + random(0, 5));

      }

    }

  }

}

​