TimerCountdown.cs

using System;
using UnityEngine;

public class TimerCountdown {
    /// <summary>
    /// Creates a timer which will return true every x seconds. Usage example in a MonoBehaviour:
    /// 
    /// private Func<bool> onTimerRestart = TimerCountDown.newTimeCounter(0.1f); // fire every 100ms
    /// ...
    /// void Update() {
    /// if (!onTimerRestart()) { return; }
    /// 
    /// </summary>
    /// <param name="countdownInSec">The interval after which the timer resets</param>
    /// <returns></returns>
    internal static Func<bool> newTimeCounter(float countdownInSec) {
        var timer = 0f;
        return delegate {
            timer += Time.deltaTime;
            if (timer < countdownInSec) { return false; } 
            timer = 0;
            return true;
        };
    }
}