2D 消隐效果

在触发消隐的物体（比如玩家）挂下面的代码，以及box collider，rigidbody 2d 

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();
        }
    }
}

再被消隐的物体上挂下面的脚本，以及box collider 2d trigger

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);
    }
}