Driftology/Assets/Scripts/NOSController.cs

using UnityEngine;
using UnityEngine.UI;

public class NOSController : MonoBehaviour
{
    [SerializeField] private float _currentNOS = 0f;
    [SerializeField] private float _chargeSpeed = 1f;
    [SerializeField] private float _depletionSpeed = 1f;
    [SerializeField] private float _boostAcceleration = 40f;
    [SerializeField] private float _audioVolume = 0.5f;
    [SerializeField] private AudioSource _boostAudio = null;

    public bool _isBoosting = false;
    private VehicleController _vehicleHandler = null;
    private MotionBlur _cameraMotionBlur;
    public float NOSRatio => _currentNOS / 100f;
    public Image _boostBarFill;

    private void Awake()
    {
        _vehicleHandler = GetComponent<VehicleController>();
        _cameraMotionBlur = Camera.main.GetComponent<MotionBlur>();

        if (_boostAudio != null)
        {
            _boostAudio.playOnAwake = false;
            _boostAudio.loop = true;
            _boostAudio.volume = _audioVolume;
        }
    }

    private void Update()
    {
        if (_vehicleHandler.AIControlled) return;

        if (!_isBoosting)
        {
            if (Mathf.Abs(_vehicleHandler.LocalVelocity.x) > 10f && _currentNOS < 100f)
            {
                _currentNOS += Time.deltaTime * (_chargeSpeed * _vehicleHandler.LocalVelocity.z / 30f);
                _boostBarFill.fillAmount = _currentNOS / 100f;
            }
        }
        else
        {
            if (_vehicleHandler.InputsActive)
            {
                _currentNOS -= Time.deltaTime * _depletionSpeed;
                _boostBarFill.fillAmount = _currentNOS / 100f;
            }

            if (_currentNOS <= 0f)
                _isBoosting = false;
        }

        ManageBoost();
    }

    private void ManageBoost()
    {
        if (_isBoosting && _vehicleHandler.InputsActive && _vehicleHandler.Running)
        {
            if (_cameraMotionBlur != null)
                _cameraMotionBlur.enabled = true;
        }
        else
        {
            if (_cameraMotionBlur != null)
                _cameraMotionBlur.enabled = false;

            _vehicleHandler.ActivateNOS(false);
        }
    }

    public void ActivateNOS()
    {
        if (_isBoosting || _currentNOS <= 0f) return;
        _isBoosting = true;
        _vehicleHandler.ActivateNOS(_isBoosting, _boostAcceleration);
    }
}