小功能⭐️Unity中利用材质自发光实现物体闪烁效果

using System.Collections;
using UnityEngine;
 
public class Skode_Glinting : MonoBehaviour
{
    /// <summary>
    /// 闪烁颜色
    /// </summary>
    public Color color = new Color(61 / 255f, 226 / 255f, 131 / 255, 1);
 
    /// <summary>
    /// 最低发光亮度，取值范围[0,1]，需小于最高发光亮度。
    /// </summary>
    [Tooltip("最低发光亮度，取值范围[0,1]，需小于最高发光亮度。")]
    [Range(0.0f, 1.0f)]
    public float minBrightness = 0.0f;
 
    /// <summary>
    /// 最高发光亮度，取值范围[0,1]，需大于最低发光亮度。
    /// </summary>
    [Tooltip("最高发光亮度，取值范围[0,1]，需大于最低发光亮度。")]
    [Range(0.0f, 1)]
    public float maxBrightness = 0.5f;
 
    /// <summary>
    /// 闪烁频率，取值范围[0.2,30.0]。
    /// </summary>
    [Tooltip("闪烁频率，取值范围[0.2,30.0]。")]
    [Range(0.2f, 30.0f)]
    public float rate = 1;
 
    //是否闪烁
    [HideInInspector]
    public bool isGlinting = false;
 
 
    [Tooltip("勾选此项则启动时自动开始闪烁")]
    [SerializeField]
    private bool _autoStart = false;
 
    private float _h, _s, _v;           // 色调，饱和度，亮度
    private float _deltaBrightness;     // 最低最高亮度差
    private Renderer _renderer;
 
    //private Material _material;
    private Material[] _materials;
 
    private readonly string _keyword = "_EMISSION";
    private readonly string _colorName = "_EmissionColor";
 
    private Coroutine _glinting;
 
    private void OnEnable()
    {
        _renderer = gameObject.GetComponent<Renderer>();
 
        //_material = _renderer.material;
        _materials = _renderer.materials;
 
        if (_autoStart)
        {
            StartGlinting();
        }
    }
 
    /// <summary>
    /// 校验数据，并保证运行时的修改能够得到应用。
    /// 该方法只在编辑器模式中生效！！！
    /// </summary>
    private void OnValidate()
    {
        // 限制亮度范围
        if (minBrightness < 0 || minBrightness > 1)
        {
            minBrightness = 0.0f;
            Debug.LogError("最低亮度超出取值范围[0, 1]，已重置为0。");
        }
        if (maxBrightness < 0 || maxBrightness > 1)
        {
            maxBrightness = 1.0f;
            Debug.LogError("最高亮度超出取值范围[0, 1]，已重置为1。");
        }
        if (minBrightness >= maxBrightness)
        {
            minBrightness = 0.0f;
            maxBrightness = 1.0f;
            Debug.LogError("最低亮度[MinBrightness]必须低于最高亮度[MaxBrightness]，已分别重置为0/1！");
        }
 
        // 限制闪烁频率
        if (rate < 0.2f || rate > 30.0f)
        {
            rate = 1;
            Debug.LogError("闪烁频率超出取值范围[0.2, 30.0]，已重置为1.0。");
        }
 
        // 更新亮度差
        _deltaBrightness = maxBrightness - minBrightness;
 
        // 更新颜色
        // 注意不能使用 _v ，否则在运行时修改参数会导致亮度突变
        float tempV = 0;
        Color.RGBToHSV(color, out _h, out _s, out tempV);
    }
 
    /// <summary>
    /// 开始闪烁。
    /// </summary>
    public void StartGlinting()
    {
        isGlinting = true;
        if (_materials != null)
        {
            if (_materials.Length > 0)
            {
                //_material.EnableKeyword(_keyword);
                for (int i = 0; i < _materials.Length; i++)
                {
                    _materials[i].EnableKeyword(_keyword);
                }
 
                if (_glinting != null)
                {
                    StopCoroutine(_glinting);
                }
                _glinting = StartCoroutine(IEGlinting());
            }
        }
    }
 
    /// <summary>
    /// 停止闪烁。
    /// </summary>
    public void StopGlinting()
    {
        isGlinting = false;
        //_material.DisableKeyword(_keyword);
        for (int i = 0; i < _materials.Length; i++)
        {
            _materials[i].DisableKeyword(_keyword);
        }
 
        if (_glinting != null)
        {
            StopCoroutine(_glinting);
        }
    }
 
    /// <summary>
    /// 控制自发光强度。
    /// </summary>
    /// <returns></returns>
    private IEnumerator IEGlinting()
    {
        Color.RGBToHSV(color, out _h, out _s, out _v);
        _v = minBrightness;
        _deltaBrightness = maxBrightness - minBrightness;
 
        bool increase = true;
        while (true)
        {
            if (increase)
            {
                _v += _deltaBrightness * Time.deltaTime * rate;
                increase = _v <= maxBrightness;
            }
            else
            {
                _v -= _deltaBrightness * Time.deltaTime * rate;
                increase = _v <= minBrightness;
            }
            //_material.SetColor(_colorName, Color.HSVToRGB(_h, _s, _v));
 
            for (int i = 0; i < _materials.Length; i++)
            {
                _materials[i].SetColor(_colorName, Color.HSVToRGB(_h, _s, _v));
            }
            //_renderer.UpdateGIMaterials();
            yield return null;
        }
    }
}