using UnityEngine;

public class ColliderFader : MonoBehaviour

{

    ItemFader[] m_Faders;

    private void OnTriggerEnter2D(Collider2D collision)

    {

        m_Faders = collision.GetComponentsInChildren<ItemFader>();

        foreach(ItemFader fader in m_Faders)

        {

            fader.FadeOut();

        }

    }

    private void OnTriggerExit2D(Collider2D collision)

    {

        m_Faders = collision.GetComponentsInChildren<ItemFader>();

        foreach (ItemFader fader in m_Faders)

        {

            fader.FadeIn();

        }

    }

}

using UnityEngine;

using DG.Tweening;

[RequireComponent(typeof(SpriteRenderer))]

public class ItemFader : MonoBehaviour

{

    SpriteRenderer render;

    private void Awake()

    {

        render = GetComponent<SpriteRenderer>();

    }

    public void FadeOut()

    {

        Color color = new Color(1, 1, 1, Settings.fadeAlpha);

        render.DOColor(color, Settings.fadeDuration);

    }

    public void FadeIn()

    {

        Color color = new Color(1, 1, 1, 1);

        render.DOColor(color, Settings.fadeDuration);

    }

}