Unity利用材质自发光实现物体闪烁

using System.Collections;using UnityEngine;public class Glinting : MonoBehaviour{ /// <summary> /// 闪烁颜色 /// </summary> public Color color = new Color(1, 0, 1, 1); /// <summary> /// 最低发光亮度，取值范围[0,1]，需小于最高发光亮度。 /// </summary> [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> [Range(0.0f, 1)] public float maxBrightness = 0.5f; /// <summary> /// 闪烁频率，取值范围[0.2,30.0]。 /// </summary> [Range(0.2f, 30.0f)] public float rate = 1; [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 readonly string _keyword = "_EMISSION"; private readonly string _colorName = "_EmissionColor"; private Coroutine _glinting; private void Start() {  _renderer = gameObject.GetComponent<Renderer>();  _material = _renderer.material;  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() {  _material.EnableKeyword(_keyword);  if (_glinting != null)  {   StopCoroutine(_glinting);  }  _glinting = StartCoroutine(IEGlinting()); } /// <summary> /// 停止闪烁。 /// </summary> public void StopGlinting() {  _material.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));   //_renderer.UpdateGIMaterials();   yield return null;  } }}