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

public class FuTiLightingCtrl : MonoBehaviour
{
    // 原始材质（在Inspector中赋值）
    public Material originalMaterial;

    //所有render
    public Renderer[] AllRenders;
    //所有实例化的材质
    private Material[] _instanceMaterials; // 实例化的材质副本

    [Range(0, 20)] public float targetIntensity = 5f; // 目标强度

    private float _currentIntensity;

    void Start()
    {
        _instanceMaterials = new Material[AllRenders.Length];

        for (int i = 0; i < AllRenders.Length; i++)
        {
            // 实例化材质副本（关键步骤）
            _instanceMaterials[i] = new Material(originalMaterial);
            // 将副本赋值给物体，替代原始材质
            AllRenders[i].material = _instanceMaterials[i];
        }

        StartCoroutine(WaitTimeToLetLighting());
    }

    // 修改实例化材质的自发光强度
    public void ChangeInstanceColor(int num)
    {
        _instanceMaterials[num].SetFloat("_EmissionIntensity", targetIntensity);
    }

    // 清理：销毁实例化的材质（避免内存泄漏）
    void OnDestroy()
    {
        for (int i = 0;i < AllRenders.Length;i++)
        {
            if (_instanceMaterials[i] != null)
            {
                Destroy(_instanceMaterials[i]);
            }
        }

    }

    IEnumerator WaitTimeToLetLighting()
    {
        int num = 0;
        while (true) {
            yield return new WaitForSeconds(0.5f);
            if (num < AllRenders.Length)
            {
                _instanceMaterials[num].SetFloat("_EmissionIntensity", targetIntensity);
                num++;
            }
            else
            {
                foreach (var mat in _instanceMaterials)
                {
                    mat.SetFloat("_EmissionIntensity", 0);
                }

                num = 0;
            }
        }
    }
}