unity When I pick up an object from the ground, the object disappears. I want him to come back after a while.

Question

The object is lost when picking up an object from the ground. I want him to come back after a while.

I am using a bag system when i click on the object on the ground the object (setactive = false) I want it to come back in the same place after a while.
Like picking up food from the ground in games. I tried this with elapsed but failed. Here is my code that doesn't work

 public class ItemPickUp : MonoBehaviour
 {
   public Item Item;
 
   public GameObject gameobj;
   float elapsed;
 
   void Pickup()
   {
     InventoryManager.Instance.Add(Item);
     gameobj.SetActive(false);
   }
   
   private void OnMouseDown()
   {
     Pickup();
   }
 
   void Update()
   {
     if(gameobj.SetActive(false))
     {
       elapsed += Time.deltaTime;
     if (elapsed >= 2f) 
     {
       elapsed = elapsed % 1f;
       gameobj.SetActive(true);
     }
     }
   }
 }

Answer 1

Best Answer

Answer by Antisra7 · 6 days ago

I did it as you said, the game did not give an error, but still what I tried to do does not work. Can this be done any other way?

Add comment · Show 2 · Share

logicandchaos · 6 days ago 1

Share

you need to activate the object, but you can't do from a script on the object, because an object can not activate itself, so in another script you need to have a reference to the object and a timer, when you collect the object and deactivate it you need to tell the other script to start the timer. Then when the timer is up you activate the gameObject through the reference. This could be done with an object pooler.

Giobar97 logicandchaos · 5 days ago 1

Share

That's true, if the script is attached to the GameObject he's deactivating. I assumed he's not doing that, because he has a public GameObject gameobj; reference at the top so I guess the script isn't in the GameObject he's trying to work on, otherwise he could have simply called gameObject.

But yes, if you have the script attached to the GameObject you're trying to deactivate, you should manage all this disappearing/reappearing from a different GameObject.

Answer 2

Answer by Giobar97 · Jan 24 at 09:21 AM

 if(gameobj.SetActive(false))

This line is not checking if gameobj is active or not. Be careful for what methods return, and what does that return value means. From the documentation: public void SetActive(bool value); SetActive is a void method, it means it returns nothing for you to read. SetActive is the method you call to set your object active or not.

To check if a gameobject is active, use instead gameobj.activeInHierarchy which returns a bool true or false, based on the state of the object in hierarchy. In your case, you can replace the line of code if(gameobj.SetActive(false)) with if(gameobj.activeInHierarchy == false) to check if gameobj is not active.

GameObject.activeInHierarchy

Add comment · Share

unity When I pick up an object from the ground, the object disappears. I want him to come back after a while.

2 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions