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Question by Markus S · Aug 28, 2012 at 01:40 PM · instantiateprefabarrayspawn

add spawned GameObjects in an array C#

Hello,

I wanna keep the GameObjects (Clones) I instantiate in an array. I tried it like this:

 //C#
     
     public Transform Object;
     public static GameObject[] SpawnedObjects;
     public static int arrayPosition = 0;
     
     void Start(){
         SpawnedObjects = new GameObject[430];
         arrayPosition = 0;
     }
     
     //....
     //In a function
     
     print("ArrayPosition: "+arrayPosition);
     SpawnedObjects[arrayPosition] = ((Instantiate(Object, Position, Quaternion.Euler (0f,0f,0f))) as GameObject);
     
     print ("Object im Array: "+SpawnedObjects[arrayPosition]);
     
     arrayPosition = arrayPosition + 1;

Later I want to be able to destroy the last GameObject added to the array in another function like this:

 if(SpawnedObjects[arrayPosition-1]){
   Destroy(SpawnedObjects[arrayPosition-1]);                        
 }


The spawning of the GameObjects is working but my array is always empty. Does anyone know what I´m doing wrong? All examples I found in the internet were showing the same way.

Thank you in advance.

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Answer by Kryptos · Aug 28, 2012 at 01:57 PM

First of all, why is the array static? You don't need static variables here.

Secondly, you are trying to store a Transform as a GameObject. Therefore the cast always returns null.

  • Either change the type of Object to Transform (by the way don't use Object as a variable name, because Object is also a reserved name for a type).

  • or use an array of Transform instead of an array of GameObject

  • or retrieve the GameObject from the instantiated transform:

       (Instantiate(Object, Position, Quaternion.identity) as Transform).gameObject;
    
    
    

edit: The need to change a value from another script is not a valid argument for using static variables. There are several ways to access a variable from another script.

For example if your script is on a unique GameObject, you can do:

 MyScriptName script = (MyScriptName) Object.FindObjectOfType(typeof(MyScriptName));
 script.publicVariable = value;

If the script is just another component on the same Gameobject, it is even easier:

 MyScriptName script = GetComponent<MyScriptName>();
 script.publicVariable = value;
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avatar image Markus S · Aug 28, 2012 at 02:44 PM 0
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Thank you for your fast response.

$$anonymous$$y array and the variable arrayPosition are static because the function to destroy the Last added GameObject is in another class.

In the original code the name of the variable isn´t Object. I´m sorry I made the mistake here.

I changed my code as you recommand to:

 (Instantiate(Object, Position, Quaternion.identity) as Transform).gameObject;

and it is working now.

Thank you for your help.

avatar image Piflik · Aug 28, 2012 at 02:46 PM 0
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