Unity3D基于OnGUI实时显示FPS

using UnityEngine;using System.Collections; [AddComponentMenu( "Utilities/HUDFPS")]public class FPSCounter : MonoBehaviour{ //fps 显示的初始位置和大小 public Rect startRect=new Rect(512, 10f, 75f, 50f ); //fps 过低时是否改变UI颜色 public bool updateColor = true; //fps UI 是否允许拖动  public bool allowDrag = true;  //fps 更新的频率 public float frequency = 0.5F; //fps 显示的精度 public int nbDecimal = 1;  //一定时间内的fps数量 private float accum = 0f; //fps计算的时间 private int frames = 0; //GUI 依赖fps的颜色 fps<10 红色 fps<30 黄色 fps>=30 绿色 private Color color = Color.white; //fps  private string sFPS = ""; //GUI 的样式 private GUIStyle style;  void Start() { StartCoroutine(FPS()); }  void Update() { accum += Time.timeScale/ Time.deltaTime; ++frames; }  IEnumerator FPS() { while( true ) { //更新fps float fps = accum/frames; sFPS = fps.ToString( "f" + Mathf.Clamp( nbDecimal, 0, 10 ) );  //更新颜色 color = (fps >= 30) ? Color.green : ((fps > 10) ? Color.yellow : Color.red);  accum = 0.0F; frames = 0;  yield return new WaitForSeconds( frequency ); } }  void OnGUI() { if( style == null ){ style = new GUIStyle( GUI.skin.label ); style.normal.textColor = Color.white; style.alignment = TextAnchor.MiddleCenter; }  GUI.color = updateColor ? color : Color.white; startRect = GUI.Window(0, startRect, DoMyWindow, ""); }  void DoMyWindow(int windowID) { GUI.Label( new Rect(0, 0, startRect.width, startRect.height), sFPS + " FPS", style ); if( allowDrag ) GUI.DragWindow(new Rect(0, 0, Screen.width, Screen.height)); }}