​

// The Nature of Code

// Daniel Shiffman

// http://natureofcode.com

​

class Mover{

  constructor() {

    this.position = createVector(random(width),random(height));

    this.velocity = createVector();

    this.acceleration = createVector();

    this.topspeed = 5;

  }

​

  update() {

    // Compute a vector that points from position to mouse

    var mouse = createVector(mouseX,mouseY);

    this.acceleration = p5.Vector.sub(mouse,this.position);

    // Set magnitude of acceleration

    this.acceleration.setMag(0.2);

​

    this.velocity.add(this.acceleration);

    this.velocity.limit(this.topspeed);

    this.position.add(this.velocity);

  }

​

  show() {

    stroke(0);

    strokeWeight(2);

    fill(127, 200);

    circle(this.position.x, this.position.y, 48);

  }

}

​