using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class FPSDisplay : MonoBehaviour
{
    // Start is called before the first frame update

    float updateInterval = 1f; // 更新帧率的时间间隔为1秒
    float accum = 0f; // 累积时间
    int frames = 0; // 在 updateInterval 时间内运行了多少帧
    float timeLeft;
    string fpsFormat;

    public Text fff;

    void Start()
    {
        timeLeft = updateInterval;
    }


    // Update is called once per frame
    void Update()
    {
        timeLeft -= Time.deltaTime;
        accum += Time.timeScale / Time.deltaTime;
        ++frames;

        if (timeLeft <= 0)
        {
            float fps = accum / frames;
            fpsFormat = System.String.Format("{0:F2} FPS", fps); // 保留两位小数
            //Debug.LogError(fpsFormat);
            timeLeft = updateInterval;
            accum = 0f;
            frames = 0;
            fff.text = fpsFormat;
        }
    }

}