// Daniel Shiffman

// http://natureofcode.com

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​

// A simple Particle class

​

class Particle {

  constructor(x, y) {

    this.position = createVector(x, y);

    this.acceleration = createVector(0, 0);

    this.velocity = p5.Vector.random2D();

    //this.velocity.mult(random(2, 5));

    this.lifespan = 70.0;

    this.icon = '💧';

  }

​

  run() {

    // let gravity = createVector(0, 0.05);

    // this.applyForce(gravity);

    this.update();

    this.show();

  }

​

  applyForce(force) {

    this.acceleration.add(force);

  }

​

  // Method to update position

  update() {

    this.velocity.add(this.acceleration);

    this.position.add(this.velocity);

    this.lifespan -= 8;

    this.acceleration.mult(0);

  }

​

  // Method to display

  show() {

    textSize(12);

    textAlign(CENTER);

    noStroke();

    fill(255, this.lifespan);

    text(this.icon, this.position.x, this.position.y);

  }

​

  // Is the particle still useful?

  isDead() {

    return this.lifespan < 0.0;

  }

}

​