slowdown-ball.js

  slowdownBall() {
    // if the ball is on the way to the opponent,
    // we slow it down so it will be on the opponents side
    // approximately at the time they actually hit it
    // NOTE that we still only receive the hit half a roundtriptime later
    if (this.physics.ball.velocity.z > 0) {
      return;
    }
    const velocity = this.physics.ball.velocity.length();
    const dist = new Vector3().subVectors(this.ball.position, this.paddleOpponent.position).length();
    const eta = dist / velocity;
    const desirableEta = eta + (this.communication.latency / 1000);
    this.physicsTimeStep = 1000 * (desirableEta / eta) * 1;
  }