Unity Script: FPS Player Camera

Attach this script to a camera object in Unity. 

This gives the player control over a first person camera with mouse-look. 

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class PlayerCameraMouseLook : MonoBehaviour

{

    public float mouseSensitivity = 100f;

    public Transform playerBody;

    float xRotation = 0f;

    // Start is called before the first frame update

    void Start()

    {

        Cursor.lockState = CursorLockMode.Locked;

    }

    // Update is called once per frame

    void Update()

    {

        float mouseX = Input.GetAxis("Mouse X") * mouseSensitivity * Time.deltaTime;

        float mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity * Time.deltaTime;

        xRotation -= mouseY;

        xRotation = Mathf.Clamp(xRotation, -90f, 90f);

        transform.localRotation = Quaternion.Euler(xRotation, 0f, 0f);

        playerBody.Rotate(Vector3.up * mouseX);

    }

}