Unity3d 简单显示FPS

c# code

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour
{
    public float updateInterval = 0.5F;
    private double lastInterval;
    private int frames = 0;
    private float fps;
    void Start()
    {
        lastInterval = Time.realtimeSinceStartup;
        frames = 0;
    }
    void OnGUI()
    {
        GUILayout.Label(" " + fps.ToString("f2"));
    }
    void Update()
    {
        ++frames;
        float timeNow = Time.realtimeSinceStartup;
        if (timeNow > lastInterval + updateInterval)
        {
            fps = frames / timeNow - lastInterval;
            frames = 0;
            lastInterval = timeNow;
        }
    }
}

 jave script

// A FPS counter. 一个FPs计时器
// It calculates framescond over each updateInterval,
// so the display does not keep changing wildly.
//在每个updateInterval间隔处计算，帧/秒，这样显示就不会随意的改变
var updateInterval = 0.5;
private var lastInterval : double; // Last interval end time 最后间隔结束时间
private var frames = 0; // Frames over current interval 超过当前间隔帧
private var fps : float; // Current FPS //当前FPS

function Start() {
    lastInterval = Time.realtimeSinceStartup;
    frames = 0;
}

function OnGUI () {
    // Display label with two fractional digits
    //在标签显示两位小数
    GUILayout.Label("" + fps.ToString("f2"));
}

function Update() {
    ++frames;
    var timeNow = Time.realtimeSinceStartup;
    if( timeNow > lastInterval + updateInterval )
    {
        fps = frames / (timeNow – lastInterval);
        frames = 0;
        lastInterval = timeNow;
    }
}