PIM_8/Assets/_Scripts/PlayerMovement.cs

using UnityEngine;

[RequireComponent(typeof(CharacterController))]
public class PlayerMovement : MonoBehaviour
{
    public float moveSpeed = 4.5f;
    public float mouseSensitivity = 2f;
    public float gravity = -18f;
    public CameraController cameraController;

    private CharacterController controller;
    private float verticalVelocity;
    private float pitch;

    private void Awake()
    {
        controller = GetComponent<CharacterController>();
    }

    private void Start()
    {
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
    }

    private void Update()
    {
        if (cameraController != null && cameraController.IsInFixedMode)
        {
            // During the attention shot the player should not move or rotate the camera.
            ApplyGravityOnly();
            return;
        }

        LookAround();
        Move();
    }

    private void LookAround()
    {
        float mouseX = Input.GetAxis("Mouse X") * mouseSensitivity;
        float mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity;

        transform.Rotate(Vector3.up * mouseX);
        pitch = Mathf.Clamp(pitch - mouseY, -65f, 70f);
        cameraController?.SetPitch(pitch);
    }

    private void Move()
    {
        float horizontal = Input.GetAxisRaw("Horizontal");
        float vertical = Input.GetAxisRaw("Vertical");

        // WASD is interpreted relative to the player's current view direction.
        Vector3 direction = (transform.right * horizontal + transform.forward * vertical).normalized;

        if (controller.isGrounded && verticalVelocity < 0f)
        {
            verticalVelocity = -1f;
        }

        verticalVelocity += gravity * Time.deltaTime;

        Vector3 velocity = direction * moveSpeed;
        velocity.y = verticalVelocity;

        controller.Move(velocity * Time.deltaTime);
    }

    private void ApplyGravityOnly()
    {
        if (controller.isGrounded && verticalVelocity < 0f)
        {
            verticalVelocity = -1f;
        }

        verticalVelocity += gravity * Time.deltaTime;
        controller.Move(Vector3.up * verticalVelocity * Time.deltaTime);
    }
}