using UnityEngine;

public class CameraRelativeCharacterController : MonoBehaviour
{
    public float speed = 5f;
    public float verticalSpeed = 5f;
    public Transform cameraTransform;

    void Update()
    {
        float horizontal = Input.GetAxis("Horizontal");
        float vertical = Input.GetAxis("Vertical");
        bool shiftHeld = Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift);

        Vector3 movement = Vector3.zero;

        if (shiftHeld)
        {
            movement = Vector3.up * vertical * verticalSpeed;
        }
        else
        {
            Vector3 forward = cameraTransform.forward;
            Vector3 right = cameraTransform.right;

            forward.y = 0f;
            right.y = 0f;
            forward.Normalize();
            right.Normalize();

            movement = forward * vertical + right * horizontal;

            if (movement.magnitude > 1f) movement.Normalize();
            movement *= speed;
        }

        transform.Translate(movement * Time.deltaTime, Space.World);
    }
}