MVC FPSController

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerControl : MonoBehaviour
{
    public Transform player;
    public Transform playerCam;
    public Transform playerObj;
    public float mouseSensitivity;
    public bool lockCursor = true;
    float cameraPitch = 0.0f;
    public Vector3 camOffset;
    public float walkSpeed;
    public float gravValue = -13.0f;
    float velocityY = 0.0f;
    public float jumpMagnitude;
    CharacterController controller = null;
    Vector3 velocity;

    // Start is called before the first frame update
    void Start()
    {
        controller = playerObj.GetComponent<CharacterController>();
        if (lockCursor)
        {
            Cursor.lockState = CursorLockMode.Locked;
            Cursor.visible = false;
        }
    }

    // Update is called once per frame
    void Update()
    {
        UpdateMouseLook();
        PlayerMovement();
        Jump();
    }

    void UpdateMouseLook()
    {
        Vector2 mouseDelta = new Vector2(Input.GetAxis("Mouse X"), Input.GetAxis("Mouse Y"));
        //remember to rotate both camera and player along the Y axis
        player.transform.Rotate(Vector3.up * mouseDelta.x * mouseSensitivity);
        playerCam.transform.Rotate(Vector3.up * mouseDelta.x* mouseSensitivity);
        playerObj.transform.Rotate(Vector3.up * mouseDelta.x * mouseSensitivity);
        //only rotate the camera along x axis
        cameraPitch -= mouseDelta.y * mouseSensitivity;
        cameraPitch = Mathf.Clamp(cameraPitch, -90.0f, 90.0f);
        playerCam.localEulerAngles = Vector3.right * cameraPitch;
    }

    void PlayerMovement()
    {
        player.transform.position = playerObj.transform.position + camOffset;
        playerCam.transform.position = playerObj.transform.position + camOffset;
        //grab input axis for keys
        Vector2 inputDir = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"));
        inputDir.Normalize();
        //
        //
        velocityY += gravValue * Time.deltaTime;
        velocity = (playerObj.transform.forward * inputDir.y + playerObj.transform.right * inputDir.x) * walkSpeed + Vector3.up * velocityY;
        controller.Move(velocity * Time.deltaTime);
    }

    void Jump()
    {
        if (Input.GetButtonDown("Jump") && controller.isGrounded)
        {
            Debug.Log("Jumping");
            velocityY = Mathf.Sqrt(jumpMagnitude * -2f * gravValue);
            controller.Move(velocity + new Vector3(0,velocityY,0) * Time.deltaTime);
        }
    }
}