How do I destroy an object on collision and at the same time trigger a new one to appear, one by one for many objects?

Question

Hi! I would like to have an object appear in my scene, and once the player collided with it ('picked it up'), it would disappear and a new object would appear on the scene. Once the player picked this one up, again, a new one would appear, and so on up until 4 or 5 objects. (It's a bit like a search game and you can look for only one item at the time.)

I manually put down 4 spheres, and put these lines in my player's movement script:

  void OnTriggerEnter(Collider other) 
 { 
 if (other.gameObject.CompareTag("Sphere")) 
 { other.gameObject.SetActive(false); 
 } 
 }

So what I could achieve with this was that when the game starts, all objects are visible and the player can pick them up one-by-one.

However, I don't know how to make the objects appear one by one. I understand how to deactivate a single object at Start(), and activate it when an event occurs, I just don't understand how to do it dynamically when it comes to 4 objects. Could you please give me some advice? Thank you in advance.

Answer 1

Best Answer

Answer by TheTrueDuck · Aug 02 at 09:06 AM

Hi!

You probably want to store some list of the remaining spheres and activate one of those, then remove it from the list:

 public List<GameObject> spheresToCollect;

 void OnTriggerEnter(Collider other)
 {
     if (other.gameObject.CompareTag("Sphere"))
     {
         other.gameObject.SetActive(false);
 
         if (spheresToCollect.Count > 0)
         {
             int randomIndex = Random.Range(0, spheresToCollect.Count);
             spheresToCollect[randomIndex].SetActive(true);
             spheresToCollect.RemoveAt(randomIndex);
         }
     }
 }

Make sure to assign the spheres in the inspector.

Hope this helps!

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bomogyoro · Aug 03 at 04:13 PM 0

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Thank you very much! I implemented it (changed it a bit) and it works great! Thank you for your help!

How do I destroy an object on collision and at the same time trigger a new one to appear, one by one for many objects?

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