How to make a timer in the game

Questions & Answers
1

How to make a timer in the game?

What I have so far? I have a main menu, when you click start game it goes to another scene and you are in a maze.

What I need? What I need is once it enters the other scene to have a timer on the bottom of the screen to see how long it takes to finish.

Any ideas?

Thanks, Chris

3

This should get you started:

private var startTime;
var textTime : String; //added this member variable here so we can access it through other scripts

function Awake() {

   startTime = Time.time;

}

function OnGUI () {

   var guiTime = Time.time - startTime;

   var minutes : int = guiTime / 60;
   var seconds : int = guiTime % 60;
   var fraction : int = (guiTime * 100) % 100;

   text = String.Format ("{0:00}:{1:00}:{2:000}", minutes, seconds, fraction); 
   GUI.Label (Rect (400, 25, 100, 30), textTime); //changed variable name to textTime -->text is not a good variable name since it has other use already

}

In your OnTriggerEnter function you then have to write the following to access the time when the trigger was entered (adjust "Main Camera" and "Timer" to whatever your game object and script name are that contain your timer):

function OnTriggerEnter (other : Collider) {
 var timeTrigger = gameObject.Find("Main Camera").GetComponent("Timer").textTime;
 Application.LoadLevel (1);//or whatever the number of your new level is
}
2

you should get the time.time in a awake or start function in new scene and then subtract the current time.time from the first value. somethings like this

var t,ellapsed;
function Start ()
{
t=time.time;
}
function Update ()
{
ellapsed=time.time-t;
}
5

Plz how to make this timer reversed ?
For example from 30.00 to 0…
Thanks.

6

I know the topic is kinda old, but in case anyone needs it…

For a reversed time I guess you could initialize a variable “goalTime” with the current time plus the amount of seconds you want to wait.

I just used Sebas answer and modified a little bit.

private var goalTime;
private var totalTime = 30.0; //the amount of time you want to start the countdown;
var textTime : String; //added this member variable here so we can access it through other scripts
 
 
function Awake() {
 
   goalTime = Time.time + totalTime;
 
}
 
function OnGUI () {
 
   var guiTime = goalTime - Time.time; // You probably want to clamp this value to be between the totalTime and zero
 
   var minutes : int = guiTime / 60;
   var seconds : int = guiTime % 60;
   var fraction : int = (guiTime * 100) % 100;
 
   text = String.Format ("{0:00}:{1:00}:{2:000}", minutes, seconds, fraction); 
   GUI.Label (Rect (400, 25, 100, 30), textTime); //changed variable name to textTime -->text is not a good variable name since it has other use already
 
}

Not tested, so I’m not sure if it works =P

4

can i noe where to place all these method at in unity?

7

Here is another solution, using just an IEnumerator. It’s quite simple to understand if you’re not familiar with the modulo etc.

   public float minutesLeft;
   public float secondsLeft;
   public Text timer_text;
    
    void Start () 
    {
       StartCoroutine(DecreaseTimer());
    }
    	
   void Update () 
   {
       if (secondsLeft == -1 && minutesLeft >= 1f)    // We correct numbers
       {
           secondsLeft = 59f;
           minutesLeft -- ;
       }

       // In order to display the "0" before the number, we check if secondsLeft < 10
       if (secondsLeft < 10f)
       {
           text_Time.text = minutesLeft.ToString() + " : " + "0" + secondsLeft.ToString();
       }
       // Otherwise we simply display it
       else text_Time.text = minutesLeft.ToString() + " : " + secondsLeft.ToString();
    
       if (secondsLeft <= 0f && minutesLeft <= 0f)
       {
           text_Time.text = "OVER !";
       }
   }
    
   IEnumerator DecreaseTimer()
   {
       while (true)
       {
           yield return new WaitForSeconds(1f);
           secondsLeft--;
       }
   }
8

If anyone needs it today…
there is a better way than Time.deltaTime. You can use IEnumerator with yield return new WaitForSeconds();

using System.Collections;
using UnityEngine;

public class Timer : MonoBehaviour {

    float _timer = 60;
    bool _active = true;

    private void Start()
    {
        StartCoroutine("timer");
    }

    IEnumerator timer()
    {
        while (_active)
        {
            yield return new WaitForSeconds(1);
            _timer--;
            Debug.Log(_timer);
            if (_timer == 0)
                _active = false;
        }
        Debug.Log("Game Over");
    }
}

yield return new WaitForSeconds(1); just means that the programm waits a second and than goes on.
If you want to change the value, you can easy do it in that line in the brackets, but if it is to low, like 0.01f it don’t work very well.