How can i rotate the spaceship to the target direction ?

Not lookat but to rotate on Z axis only. The problem is that the spaceship is rotating on X and Z axis also some on Y and the spaceship is steering up.

And i want it to rotate only on the Z axis.

The script is attached to the spaceship. The script name is LookAtCamera but it's LookAtTarget but that is never mind i will change the name later.

This is a screenshot of the spaceship on it's original position and rotation state:



And this is a screenshot of the spaceship after the rotation. The target is a FPSController object i have down on the terrain. But instead rotating to it's direction on the Z the spaceship is steering up. I don't want to use LookAt i want to rotate the spaceship on Z to face the direction of the target it should move to.



And this is a screenshot of how i want the spaceship to be rotating to the target this is what i mean on the Z (i think on the Z) but this is what i mean rotating the spaceship to face the target direction not lookat: I changed on my own the spaceship rotation on Z to -120 this is what i want the script to do to rotate on the Z facing the target direction:



The script that is attached to the spaceship:

Code (csharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6. public class LookAtCamera : MonoBehaviour {
7.  
8.     //values that will be set in the Inspector
9.     public Transform target;
10.     public float RotationSpeed;
11.  
12.     //values for internal use
13.     private Quaternion _lookRotation;
14.     private Vector3 _direction;
15.  
16.     // Update is called once per frame
17.     void Update()
18.     {
19.         //find the vector pointing from our position to the target
20.         if (target)
21.             _direction = (target.position - transform.position).normalized;
22.  
23.         //create the rotation we need to be in to look at the target
24.         _lookRotation = Quaternion.LookRotation(_direction);
25.  
26.         //rotate us over time according to speed until we are in the required rotation
27.         transform.rotation = Quaternion.Slerp(transform.rotation, _lookRotation, Time.deltaTime * RotationSpeed);
28.     }
29. }
30.  

 

What is the target position? Is it the mouse position? Either way look into using

https://docs.unity3d.com/ScriptReference/Transform.Rotate.html

Or even passing just the Z position into the look rotation by doing something like

Code (CSharp):

1. _lookRotation = Quaternion.LookRotation(new Vector3 (0,0,_direction.z);

 

The problem is that your model's wasn't exported with the expected axis orientation. Unity considers
X = Right,
Y = Up,
Z = forward

however your model is using
X = Left
Y = Foward
X = Up

You can still use LookRotation, just swap the variables.

Code (CSharp):

1. _lookRotation = Quaternion.LookRotation(Vector3.up, _direction);