ControllerWarning.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

// <summary>
// Splash screen.cs
// Bj Thomas
// 8/20/2018
// <summary>

public class ControllerWarning : ControllerManager {

    public Texture2D _controllerWarningBackground;                                                            //Create slot in inspector to assign the controller warning background
    public Texture2D _controllerWarningText;                                                                  //Create slot in inspector to assign the controller warning text message
    public Texture2D _controllerDetectedText;                                                                //Create slot in inspector to assign the controller detected text message

    public float _controllerWarningFadeValue;                                                                //Defines the fade value of the warning text
    private float _controllerWarningFadeSpeed = 0.25f;                                                       //Defines the fade speed
    private bool _controllerConditionsMet;                                                                  //Defines if the controller conditions are met for the game to continue

    // Use this for initialization
    void Start () {
        _controllerWarningFadeValue = 1;                                                                   //Fade value equals one on startup
        _controllerConditionsMet = false;                                                                  //Controller condintions met is false on startup
	}

	// Update is called once per frame
	void Update () {
        if (_controllerDetected == true)                                                                   //if controller detected equals true
            StartCoroutine("WaitToLoadMainMenu");                                                          //Start WaitToLoadMainMenu function

        if (_controllerConditionsMet == false)                                                             //if controller condition met equals false
            return;                                                                                        //then do nothing and return

        if(_controllerConditionsMet == true){                                                              //if controller conditions met equals true
            _controllerWarningFadeValue -=                                                                 //decrease fade value
                _controllerWarningFadeSpeed                                                                //by fade speed
                * Time.deltaTime;                                                                          //times delta time

            if (_controllerWarningFadeValue < 0)                                                           //if fade equals zero
                _controllerWarningFadeValue = 0;                                                           //then set fade value to equal zero exactly

            if (_controllerWarningFadeValue == 0)
            {
                _startUpFinished = true;                                                                   //Set startup finished to true
                SceneManager.LoadScene("MainMenu");                                                        //load main menu scene
            }
        }
    }

    private IEnumerator WaitToLoadMainMenu(){
        yield return new WaitForSeconds(2);                                                                 //wait for this (x) many seconds

        _controllerConditionsMet = true;                                                                    //Set controller condition met to true
    }

    private void OnGUI(){
        GUI.DrawTexture(new Rect(0, 0,                                                                     //Draw Texture starting at 0,0
            Screen.width, Screen.height),                                                                  //by the screen width and height
            _controllerWarningBackground);                                                                 //draw the warning background

        GUI.color = new Color(1,1,1,                                                                      //GUI color is equal to 1 1 1 (rgb default)
            _controllerWarningFadeValue);                                                                 //plus the fade value

        GUI.DrawTexture(new Rect(0, 0,                                                                   //Draw Texture starting at 0,0
            Screen.width, Screen.height),                                                                //by the screen width and height
            _controllerWarningText);                                                                     //draw the controller warning text

        if(_controllerDetected == true)                                                                 //if controller detected equals true
            GUI.DrawTexture(new Rect(0, 0,                                                              //Draw Texture starting at 0,0
            Screen.width, Screen.height),                                                               //by the screen width and height
            _controllerDetectedText);                                                                   //draw the controller detected text
    }
}