Box.js

const G = 0.2;

class Box{
  constructor(x, y, w, h){
    this.PosX = null;
    this.PosY = null;
    this.Width = null;
    this.Height = null;
    if (x && y && w && h){
      this.PosX = x;
      this.PosY = y;
      this.Width = w;
      this.Height = h;
    }
    this.Mass = 10;
    this.Angle = 0;
    this.Velocity = createVector(0, 0);
    this.Acceleration = createVector(0, 0);
    this.SumOfForces = createVector(0, 0);
    this.SumOfRotationalForces = 0;
    this.RotationalAcceleration = 0;
    this.RotationVelocity = 0;
    this.Edges = [];
  }

  UpdateEdges(){
    let UpperRight = createVector();
    let UpperLeft = createVector();
    let DownRight = createVector();
    let DownLeft = createVector();
    const BoxAngle = (this.Angle);
    angleMode(DEGREES);
    UpperRight.x = this.PosX + this.Width / 2 * cos(BoxAngle) - this.Height / 2 * cos(90 + BoxAngle);
    UpperRight.y = this.PosY + (this.Width / 2 * sin(BoxAngle) - this.Height / 2 * sin(90 + BoxAngle));

    UpperLeft.x = this.PosX - this.Width / 2 * cos(BoxAngle) - this.Height / 2 * cos(90 + BoxAngle);
    UpperLeft.y = this.PosY - (this.Width / 2 * sin(BoxAngle) + this.Height / 2 * sin(90 + BoxAngle));

    DownRight.x = this.PosX + this.Width / 2 * cos(BoxAngle) + this.Height / 2 * cos(90 + BoxAngle);
    DownRight.y = this.PosY + (this.Width / 2 * sin(BoxAngle) + this.Height / 2 * sin(90 + BoxAngle));

    DownLeft.x = this.PosX - this.Width / 2 * cos(BoxAngle) + this.Height / 2 * cos(90 + BoxAngle);
    DownLeft.y = this.PosY - (this.Width / 2 * sin(BoxAngle) - this.Height / 2 * sin(90 + BoxAngle));
    if (this.Edges.length == 0){
      for (let i = 0; i < 4; ++i){
        let Edge = new Line();
        this.Edges.push(Edge);
      }
    }
    else{
      this.Edges[0].SetParameters(UpperRight.x, UpperRight.y, UpperLeft.x, UpperLeft.y);
      this.Edges[1].SetParameters(UpperRight.x, UpperRight.y, DownRight.x, DownRight.y);
      this.Edges[2].SetParameters(DownLeft.x, DownLeft.y, DownRight.x, DownRight.y);
      this.Edges[3].SetParameters(DownLeft.x, DownLeft.y, UpperLeft.x, UpperLeft.y);
    }
  }

  SetAngle(a){
    this.Angle = a;
  }

  SetCoordinats(x, y){
    this.PosX = x;
    this.PosY = y;
  }

  SetMass(m){
    this.Mass = m;
  }

  SetSize(w, h){
    this.Width = w;
    this.Height = h;
  }

  ApplyGravity(){
    const GravitationalForce = createVector(0, G * this.Mass);
    this.SumOfForces.add(GravitationalForce)
  }

  ApplyForce(Force){
    this.SumOfForces.add(Force);
  }

  Update(){
    this.SumOfForces.add(this.Velocity * -0.7);
    this.Acceleration = this.SumOfForces.div(this.Mass);
    this.Velocity.add(this.Acceleration);
    this.PosX += this.Velocity.x;
    this.PosY += this.Velocity.y;
    this.SumOfRotationalForces += this.RotationVelocity * -0.3;
    this.RotationalAcceleration = this.SumOfRotationalForces / this.Mass;
    this.RotationVelocity += this.RotationalAcceleration;
    this.Angle += this.RotationVelocity;
    this.SumOfRotationalForces = 0;
    this.UpdateEdges();
  }

  Render(Color){
    push();
    if (Color) fill(Color);
    else fill(255);
    translate(this.PosX, this.PosY);
    angleMode(DEGREES);
    rotate(this.Angle);
    rectMode(CENTER);
    translate(0, 0);
    rect(0, 0, this.Width, this.Height);
    pop();
    for (let Edge of this.Edges){
      Edge.Render();
    }
    fill(0);
    circle(this.PosX, this.PosY, 10);
  }
}