let attractor;

const G = 0.5; // Gravitational constant

​

function setup() {

  createCanvas(400, 400);

  // Initialize the objects

  self = new Object(200, 200, 2, createVector(0, 0));

  attractor = new Object(200, 100, 10, createVector(0, 0));

}

​

function draw() {

  background(220);

  // Update positions and calculate gravitational forces

  self.update();

  self.calculateGravitationalForce(attractor);

  // Apply forces and update velocities

  self.applyForce();

  // Draw objects

  self.display();

  attractor.display();

}

​

class Object {

  constructor(x, y, mass, velocity) {

    this.position = createVector(x, y);

    this.mass = mass;

    this.velocity = velocity;

    this.acceleration = createVector(0, 0);

  }

  update() {

    // Update position based on velocity

    this.position.add(this.velocity);

  }

  calculateGravitationalForce(attractor) {

    // Calculate distance between objects

    const distance = p5.Vector.dist(attractor.position, this.position);

    // Calculate gravitational force

    const forceMagnitude = ((this.position.mag() - attractor.position.mag()) / distance) * G * attractor.mass;

    // Calculate the direction of the force

    const forceDirection = p5.Vector.sub(attractor.position, this.position).normalize();

    // Calculate the force vector

    const force = forceDirection.mult(forceMagnitude);

    // Apply the force to the object's acceleration

    this.acceleration.add(force);

  }

  applyForce() {

    // Update velocity based on acceleration

    this.velocity.add(this.acceleration);

    // Reset acceleration

    this.acceleration.mult(0);

  }

  display() {

    // Draw the object

    fill(0);

    ellipse(this.position.x, this.position.y, this.mass * 2);

  }

}

​