How to fade in and out two panels in a scene? (c#)

Questions & Answers
1

I searched far and wide about how to make a panel fade in and out, with no success. I have a scene, and two logos, one for my school, and one for my group. I have two panels, one for each logo, and I wanted to make them go:

Black screen > Fade In Panel#1 > Stay (3 sec) > Fade Out Panel#1 > Black Screen (0.5 sec) > Fade In Panel#2 > Stay (3 sec) > Fade Out Panel#3 > Black Screen (0.5 sec) > Fade In Menu. (Do not worry about the menu, it’s not important right now).

This is what I have done until now:

public class DelayLogo : MonoBehaviour
{

public float marcador;
public float intervalo;
public GameObject PanelPUCLogo;
public GameObject PanelLuftLogo;

// Use this for initialization
void Start()
{
    marcador = Time.time;
    intervalo = 2.0f;
}

// Update is called once per frame
void Update()
{
    if (Time.time - marcador >= intervalo || Input.anyKey)
    {
        PanelPUCLogo.SetActive(true);
    }
    if (Time.time - marcador >= intervalo + 3 || Input.anyKey)
    {
        PanelLuftLogo.SetActive(true);
        PanelPUCLogo.SetActive(false);
    }
}
}

This is what this script does:

Black Screen > Panel#1 (3 sec) > Panel#2 (3sec). It doesn’t fade in/out anything.

Btw,
PanelPUCLogo = Panel#1 In my example;
PanelLuftLogo = Panel#2 in my example

2

If you’re using a UI Image component (which I would recommend), you can simply dial into its color alpha channel.

using UnityEngine.UI; // required to access UI components

public Image logo; // assign your logo here
Color logoColor;
float logoOpacity;
float time;

void Awake ()
{
    logoColor = logo.color;
    logoOpacity = logoColor.a;
}

void Update ()
{
    time += Time.deltaTime / 10f; // time will reach 1 after ten seconds
    logoOpacity = Mathf.Lerp (1f, 0f, time); interpolating from 1 to 0 with time
    logoColor.a = logoOpacity;
    logo.color = logoColor;
}