代码如下,只是用到OnGUI和帧运算:
using System.Collections; using System.Collections.Generic; using UnityEngine; public class FPSShow : MonoBehaviour { /// <summary> /// 刷新的时间间隔 /// </summary> public float timerInterval = .5f; /// <summary> /// 是否显示 /// </summary> public bool isShow = true; private float leftTimer = 0; /// <summary> /// 在区间内绘制帧 /// </summary> private int frames; /// <summary> /// FPS在间隔时间内累积 /// </summary> private float accum = 0; /// <summary> /// 文本数据缓存 /// </summary> private string textData = null; private GUIStyle guiStyle = new GUIStyle (); /// <summary> /// 区域 /// </summary> private Rect posSize; /// <summary> /// 是否提示 /// </summary> private bool already_Tip = false; /// <summary> /// 数量 /// </summary> int low_cout = 0; void Start () { // #if UNITY_EDITOR||UNITY_STANDALONE_WIN // #else // Destroy(this); // return; // #endif DontDestroyOnLoad (gameObject); leftTimer = timerInterval; //文本默认颜色 guiStyle.normal.textColor = Color.red; //文字大小 guiStyle.fontSize = 12; //显示区域 posSize = new Rect (0, 0, 70, 50); } void Update () { ++frames; leftTimer -= Time.deltaTime; accum += Time.timeScale / Time.deltaTime; //间隔结束 那么就更新GUI文本 并开始新的间隔 if (leftTimer <= 0.0) { //显示两个小数(f2格式) float fps = accum / frames; //计算粒子系统 int particleNum = CountParticleNum (); textData = System.String.Format ("FPS:{0:F2}, 粒子数:{1:d}", fps, particleNum); //只显示FPS //textData = System.String.Format ("FPS:{0:F2}", fps); if (fps < 20) { guiStyle.normal.textColor = Color.red; } else if (fps < 25) { guiStyle.normal.textColor = Color.yellow; } else { guiStyle.normal.textColor = Color.green; } leftTimer = timerInterval; accum = 0.0f; frames = 0; } } /// <summary> /// 在GUI中显示 /// </summary> void OnGUI () { if (isShow) { GUI.Label (posSize, textData, guiStyle); } } /// <summary> /// 计算当前场景粒子数量 /// </summary> /// <returns>The particle number.</returns> int CountParticleNum () { int totalNum = 0; ParticleSystem[] ps = GameObject.FindObjectsOfType <ParticleSystem> (); foreach (ParticleSystem item in ps) { if (item.isPlaying) { //同屏粒子数(当前被渲染数量) if (item.GetComponent <Renderer> () != null && item.GetComponent<Renderer> ().isVisible) { totalNum += item.particleCount; } } } return totalNum; } }