Enable GameObjects one by one each after 1 sec.

Question

Hi, I am trying to make a kids education game, where i want to show how to count objects. Basic idea is to make few scenes and have few objects in each scene. Then I want numbers to appear on top of those objects 1 by 1 after 1 sec each, as if I am counting them and showing it to the user. I have done it and somehow its working too, but i think there is surely a better way to do it. Please advice. alt text

Here is my part of code, which i came up with.

  using System.Collections;
             using System.Collections.Generic;
             using UnityEngine;
             using UnityEngine.SceneManagement;
         
         public class GameManager : MonoBehaviour
         {
         public GameObject count1, count2, count3, count4, count5;
     
     public void ShowTheCounting()
         {
             Invoke("Count1", 1f);
             Invoke("Count2", 2f);
             Invoke("Count3", 3f);
             Invoke("Count4", 4f);
             Invoke("Count5", 5f);
             
         }
 
 public void Count1()
     {
         count1.SetActive(true);
         AudioSource.PlayClipAtPoint(sound1, transform.position);
     }
 
     public void Count2()
     {
         count2.SetActive(true);
         AudioSource.PlayClipAtPoint(sound1, transform.position);
     }
 
     public void Count3()
     {
         count3.SetActive(true);
         AudioSource.PlayClipAtPoint(sound1, transform.position);
     }
 
 public void Count4()
     {
         count4.SetActive(true);
         AudioSource.PlayClipAtPoint(sound1, transform.position);
     }
 
 public void Count5()
     {
         count5.SetActive(true);
         AudioSource.PlayClipAtPoint(sound1, transform.position);
     }
 }
 

        I want to create just one script and handle all scenes. So if scene 1 has 3 objects, It should only count, 123, if scene 2 has 5 objects, it should count till 5 and so on.

Kindly help me.

TIA

Answer 1

Using a Coroutine:

     public GameObject[] counts;
     public float timeBetween = 1f; // Time in seconds
 
     public void ShowTheCounting() { // You call this function
         StartCoroutine(Count());
     }
 
     public IEnumerator Count() 
     {
         foreach (GameObject count in counts)
         {
             count.SetActive(true);
             yield return new WaitForSeconds(timeBetween); // Waits for the time set in timeBetween, affected by timeScale.
         }
     }

You have to assign all your counts to counts. Here's an example video: Video
Update:
To add a sound to each count, you can create a class to store the sounds and objects. It would look like this:

         public CountItem[] counts;
         public float timeBetween = 1f; // Time in seconds
 
         ...
 
         public IEnumerator Count() 
         {
             foreach (CountItem count in counts)
             {
                 count.item.SetActive(true);
                 count.sound.Play(0); // Play the sound
                 yield return new WaitForSeconds(timeBetween); // Waits for the time set in timeBetween, affected by timeScale.
             }
         }

             class CountItem 
             {
                     public GameObject item;
                     public AudioSource sound;
             }

And then in the inspector, you assign the count to item and your sound to sound.

Answer 2

Answer by Cornelis-de-Jager · Feb 06, 2019 at 09:13 PM

You can use a combination of Co routines and IEnemerables to get what you want. Below I use the Stack : IEnemerable to give me an easy way to get and remove elements from the top of the collection.

 using System.Collections.Generic;

 public Stack<GameObject> Spawnables;
 public int waitTime;
 
 public void StartCountingProcess () {
     StartCoroutine (CountingCoroutine());
 }
 
 Ienumerator CountingCoroutine () {
 
     while (Spawnables.Count() > 0){
         yield return new WaitForSeconds (waitTime);
         var spawnable = Spawnables.Pop();
         Instantiate (spawnable, Vector3.Zero /* Position Goes here*/, Quaternion.Identity /* Rotation goes here*/);
     }
 }

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Answer 3

Answer by toddisarockstar · Feb 06, 2019 at 10:18 PM

you can make this much simpler with arrays.

add this to the top of your script:

 using System.Collections.Generic;

this should work:

     //drop your objects representing numbers into the inspector
     public GameObject[] counts = new GameObject[5];
     public int index;
     public int[] cur; 
     
     public void StartScene (params int[] numbers) {
         index = 0;cur = numbers;
         foreach(GameObject g in counts){g.SetActive(false);    }
         StartCoroutine (CountingCoroutine());
     }
 
 
     IEnumerator CountingCoroutine () {
         
         while (index < cur.Length){
             yield return new WaitForSeconds (2);
             counts[cur[index]].SetActive(true);
             index++;}
         }
 
 
     void Start(){
         // these object numbers will light up in this order
         StartScene (1, 2, 3);
     }

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Enable GameObjects one by one each after 1 sec.

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