CameraController.cs

using PlanetaryTerrain;
using Unity.VisualScripting;
using UnityEngine;

public class VehicleCameraController : MonoBehaviour
{
    public float zoomSpeed;
    public float orbitSize;
    public Transform orbitMiddle;
    [SerializeField] Planet planet;

    public float sensitivity = 2f;

    public GameObject build;

    void Start()
    {
        this.build = GameObject.Find("Build");
    }

    // Update is called once per frame
    void Update()
    {
        this.Zoom();

        if (Input.GetMouseButton((int)MouseButton.Left))
            this.Rotate();
        if (Input.GetMouseButtonUp((int)MouseButton.Left))
        {
            Cursor.lockState = CursorLockMode.None;
            Cursor.visible = true;
        }
    }

    private void FixedUpdate()
    {
        this.orbitMiddle.position = this.build.transform.position;
    }

    public void Rotate()
    {
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
        float mouseX = Input.GetAxis("Mouse X");
        float mouseY = Input.GetAxis("Mouse Y");

        transform.RotateAround(orbitMiddle.position, transform.up, mouseX * this.sensitivity * 100f * Time.deltaTime);
        transform.RotateAround(orbitMiddle.position, transform.right, -mouseY * this.sensitivity * 100f * Time.deltaTime);
    }

    private void Zoom()
    {
        float scroll = Input.GetAxis("Mouse ScrollWheel");

        this.orbitSize -= scroll * this.zoomSpeed;
        this.orbitSize = Mathf.Clamp(this.orbitSize, 2f, 50f);

        Vector3 direction = (transform.position - this.orbitMiddle.position).normalized;
        transform.position = this.orbitMiddle.position + direction * this.orbitSize;
        transform.LookAt(this.orbitMiddle);

    }

    private void OnDrawGizmos()
    {
        Gizmos.DrawWireSphere(this.orbitMiddle.position, this.orbitSize);
    }
}