zombie_mp/Assets/Scripts/Menu/settings.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Rendering.PostProcessing;
using UnityEditor;

public class settings : MonoBehaviour
{
    public AudioSource audSrc;
    public GameObject[] settingsSections;
    public Button[] settingsSectionsBtns;
    public AudioClip settingsSectionSelectedSFX;
    public AudioClip settingsChangedSFX;
    public AudioClip onHoverSfx;

    [Header("Graphics")]
    public Toggle vsync;
    public Dropdown shadows;
    public Dropdown aa;
    public Dropdown pp;
    public Dropdown particles;
    public Dropdown textureQ;
    public Dropdown lightningQ;


    public void show()
    {
        gameObject.SetActive(true);
    }

    public void hide()
    {
        gameObject.SetActive(false);
    }


    void Start()
    {
        DontDestroyOnLoad(gameObject);
        SettingPage.instance = this;
        vsync.onValueChanged.AddListener((bool b) => {
            PlayerPrefs.SetInt("vsync", (b) ? 1 : 0);
            PlayerPrefs.Save();
            playSettingsChangedSFX();
            reloadGraphicSettings();
        });

        shadows.onValueChanged.AddListener((int option) =>
        {
            PlayerPrefs.SetInt("shadows", option);
            PlayerPrefs.Save();
            playSettingsChangedSFX();
            reloadGraphicSettings();
        });

        aa.onValueChanged.AddListener((int option) =>
        {
            PlayerPrefs.SetInt("aa", option);
            PlayerPrefs.Save();
            playSettingsChangedSFX();
            reloadGraphicSettings();
        });

        pp.onValueChanged.AddListener((int option) =>
        {
            PlayerPrefs.SetInt("pp", option);
            PlayerPrefs.Save();
            playSettingsChangedSFX();
            reloadGraphicSettings();
        });

        particles.onValueChanged.AddListener((int option) =>
        {
            PlayerPrefs.SetInt("particles", option);
            PlayerPrefs.Save();
            playSettingsChangedSFX();
            reloadGraphicSettings();
        });

        textureQ.onValueChanged.AddListener((int option) =>
        {
            PlayerPrefs.SetInt("textureQ", option);
            PlayerPrefs.Save();
            playSettingsChangedSFX();
            reloadGraphicSettings();
        });

        lightningQ.onValueChanged.AddListener((int option) =>
        {
            PlayerPrefs.SetInt("lightningQ", option);
            PlayerPrefs.Save();
            playSettingsChangedSFX();
            reloadGraphicSettings();
        });

        reloadGraphicSettings();

        if (settingsSections.Length != settingsSectionsBtns.Length) { Debug.LogError("IMBALANCED SETTINGS CONFIG!"); }
        else
        {
            for (int i = 0; i < settingsSectionsBtns.Length; i++)
            {
                int x = i;
                settingsSectionsBtns[x].onClick.AddListener(() => { onSettingsSectionClick(x); });
            }
        }
        onSettingsSectionClick(0);
    }


    void onSettingsSectionClick(int i)
    {
        Debug.Log("Selected " + i + " button");
        for (int x = 0; x < settingsSectionsBtns.Length; x++)
        {
            settingsSectionsBtns[x].interactable = (x != i);
            settingsSections[x].SetActive((x == i));
        }
        reloadGraphicSettings();
        audSrc.PlayOneShot(settingsSectionSelectedSFX);
    }

    void playSettingsChangedSFX()
    {
        audSrc.PlayOneShot(settingsChangedSFX);
    }

    public void OnHoverSFX()
    {
        audSrc.PlayOneShot(onHoverSfx);
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            hide();
        }
    }


    public void reloadGraphicSettings()
    {
        //Read all settings from prefs
        vsync.isOn = PlayerPrefs.GetInt("vsync") == 1;
        shadows.value = PlayerPrefs.GetInt("shadows");
        aa.value = PlayerPrefs.GetInt("aa");
        pp.value = PlayerPrefs.GetInt("pp");
        particles.value = PlayerPrefs.GetInt("particles");
        textureQ.value = PlayerPrefs.GetInt("textureQ");
        lightningQ.value = PlayerPrefs.GetInt("lightningQ");

        //APPLY EACH
        QualitySettings.vSyncCount = PlayerPrefs.GetInt("vsync");
        QualitySettings.softParticles = pp.value == 1;

        switch (shadows.value)
        {
            case 0:
                QualitySettings.shadows = ShadowQuality.All;
                QualitySettings.shadowResolution = ShadowResolution.VeryHigh;
                break;

            case 1:
                QualitySettings.shadows = ShadowQuality.All;
                QualitySettings.shadowResolution = ShadowResolution.High;
                break;

            case 2:
                QualitySettings.shadows = ShadowQuality.HardOnly;
                QualitySettings.shadowResolution = ShadowResolution.Medium;
                break;

            case 3:
                QualitySettings.shadows = ShadowQuality.HardOnly;
                QualitySettings.shadowResolution = ShadowResolution.Low;
                break;

            case 4:
                QualitySettings.shadows = ShadowQuality.Disable;
                break;
        }

        switch (aa.value)
        {
            case 0:
                QualitySettings.antiAliasing = 0;
                break;

            case 1:
                QualitySettings.antiAliasing = 2;
                break;

            case 2:
                QualitySettings.antiAliasing = 4;
                break;

            case 3:
                QualitySettings.antiAliasing = 8;
                break;
        }

        PostProcessVolume[] volumes = FindObjectsOfType<PostProcessVolume>();
        switch (pp.value)
        {

            case 0:                
                foreach (PostProcessVolume vol in volumes)
                {
                    vol.enabled = true;
                }
                break;

            case 3:
                foreach(PostProcessVolume vol in volumes)
                {
                    vol.enabled = false;
                }
                break;
        }

        QualitySettings.masterTextureLimit = textureQ.value;

        switch (lightningQ.value)
        {
            case 0:
              //  PlayerSettings.colorSpace = ColorSpace.Linear;
                break;

            case 1:
              //  PlayerSettings.colorSpace = ColorSpace.Gamma;
                break;
        }
    }
}


public static class SettingPage
{
    public static settings instance;
}