// Daniel Shiffman

// http://natureofcode.com

​

class Mover {

  constructor() {

    this.mass = 1;

    this.position = createVector(width / 2, 30);

    this.velocity = createVector(0, 0);

    this.acceleration = createVector(0, 0);

  }

​

  applyForce(force) {

    let 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(127, 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;

    }

  }

​

}

​