Instantiating a prefab and storing it in a multi-dimensional array

Question

I have a script called InitGameBoard. I have a multi-dimensional array of game objects declared at the beginning like this:

 public GameObject[,] floorContents=new GameObject[20,20];

I am trying to store an Instantiated prefab in the multi-dimensional array like this:

 Vector3 select2ndPos=new Vector3(dieEight,0,dieSix);
 floorContents[dieEight,dieSix]=Instantiate(fireObject,select2ndPos,transform.rotation)as GameObject;

and then I am trying to destroy it and remove it from the scene like this:

 Destroy(floorContents[x,z]);

But it doesn't seem like it is even saving the object in the array, and it isn't giving me any errors. Any idea what I'm doing wrong?

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Answer by Xtro · Aug 02, 2013 at 12:09 AM

Make sure the type of fireObject is GameObject.

If the type is a script class, then use fireObject.gameObject in Instantiate method.

Btw, I don't prefer to use "as" for casting purposes. Because it doesn't throw an exception when there is a type casting mismatch. It just sets it to null silently.

To be able to catch that casting errors, you should use regular casting like...

floorContents[dieEight,dieSix]=(GameObject)Instantiate(fireObject,select2ndPos,transform.rotation);

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caleb.q.owens · Aug 02, 2013 at 12:34 AM 0

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Okay, I think I'm getting closer, you were right about some type of casting mismatch, the values were staying as null. I have fireObject declared like this:

 public GameObject fireObject;

And then I try to instantiate a prefab like this:

  floorContents[3,3]=(GameObject)Instantiate(fireObject,selectPos,transform.rotation);

I have also tried using fireObject.gameObject when instanciating

I keep getting this error: Cannot cast from source type to destination type.

Thanks for the quick help.

caleb.q.owens · Aug 02, 2013 at 12:57 AM 1

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Never$$anonymous$$d, I figured it out, rookie mistake. I somehow had two initGameBoard script components on the same prefab and one of them wasn't assigned fireObject. I removed that Component and it was perfect. Thanks for the help.

Instantiating a prefab and storing it in a multi-dimensional array

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