public class Movement : MonoBehaviour
{
    // stuff
    public Camera gameCamera;
    public CharacterController characterController;
    public GameObject gun;

    // mouse
    public float mouseSensitivity = 150f;
    private Vector3 desiredCameraRotation = new Vector3();
    public float sway = 1f;
    public float swayDissipation = 1.1f;

    // movement settings
    public float speed = 15f;
    public float sidewaysSpeed = 13f;
    public float strafeSpeed = 10f;

    bool firstFrame = true; // for fixing movement glitch when game starts
    private Vector3 swayMovement = new Vector3();
    void Start()
    {
        Screen.lockCursor = true;
    }

    void Update()
    {
        float mouseInputX = Input.GetAxis("Mouse X");
        float mouseInputZ = Input.GetAxis("Mouse Y");

        swayMovement += new Vector3(mouseInputX * sway, -mouseInputZ * sway, 0);
        swayMovement /= swayDissipation;

        gun.transform.localPosition = Vector3.Lerp(swayMovement, new Vector3(), 0.1f);
    }
    void FixedUpdate()
    {
        // movement values
        float mouseInputX = Input.GetAxis("Mouse X");
        float mouseInputZ = Input.GetAxis("Mouse Y");
        float horizontalInput = Input.GetAxis("Horizontal");
        float verticalInput = Input.GetAxis("Vertical");

        if (firstFrame == true) { mouseInputX = 0f; mouseInputZ = 0f; firstFrame = false; }

        float usedSpeed = speed;
        float usedSidewaysSpeed = sidewaysSpeed;

        // speed is just retarded by default so decrease it
        horizontalInput /= 50;
        verticalInput /= 50;

        // nerf strafing wtf
        if (horizontalInput != 0 && verticalInput != 0 )
        {
            usedSpeed = (strafeSpeed);
            usedSidewaysSpeed = (strafeSpeed);
        }

        // desired camera rotation for smoothing
        desiredCameraRotation += new Vector3(-mouseInputZ * mouseSensitivity, mouseInputX * mouseSensitivity, 0);

        if (desiredCameraRotation.x > 90)
        {
            desiredCameraRotation = new Vector3(90, 0, 0);
        } else if (desiredCameraRotation.x < -90)
        {
            desiredCameraRotation = new Vector3(-90, 0, 0);
        }

        // camera rotation
        transform.Rotate(new Vector3(0, mouseInputX * mouseSensitivity, 0));
        gameCamera.transform.position = transform.position + new Vector3(0,1f,0);
        gameCamera.transform.localRotation = Quaternion.Euler(desiredCameraRotation);

        //movement
        Vector3 movement = transform.right * usedSidewaysSpeed * horizontalInput + transform.forward * usedSpeed * verticalInput;

        characterController.Move(movement);


    }
}