Rotate pieces of model to look at player

Questions & Answers
1

I have a artillery-type model in my game, and i want one group of pieces to rotate left and right to look at the player, and a group inside that group to also rotate up and down to point at the player. I have a script made, but it won’t let me pick the right direction to be forward.

using UnityEngine;
using System.Collections;

public class Aim : MonoBehaviour {

    public Vector3 LeftRightForward;
    public Vector3 UpDownForward;
    public bool LeftRight;
    public bool UpDown;
    GameObject Player;

    void Start()
    {
        Player = GameObject.Find("Player");
    }

    void Update()
    {
        if (LeftRight)
        {
            GetComponent<Rigidbody>().rotation = Quaternion.LookRotation(new Vector3(Player.transform.position.x, transform.position.y, Player.transform.position.z) - transform.position, LeftRightForward);
        }
        if (UpDown)
        {
            GetComponent<Rigidbody>().rotation = Quaternion.LookRotation(Player.transform.position - transform.position, UpDownForward);
        }
    }
}

(The reason for so many public variables is so i could find out which direction was the right forward for the model from the editor.)

Here are pictures of the model:
Rotate Left-Right
Rotate Up-Down
Base
All
Does anyone know what is wrong?

P.S. The Up-Down and Left-Right have the script attached with the correct bool set to true. These pictures are slightly old

2

Have you tried:

//for instant rotation 
transform.LookAt(transform); 
//smooth rotation
transform.rotation = Quaternion.Slerp(this.transform.rotation, Quaternion.LookRotation(target.position - this.transform.position), speed * Time.deltaTime);//in here you can edit the vector target so it would work only on the x axis for exmp