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Question by wraithseeker · Aug 09, 2015 at 04:20 AM · gameobject

Problem with Instantiating through GameObject or Transform

I am quite confused about Instantiating an object as a Transform or a GameObject. Instantiating the object as a GameObject seems to throw in Object Reference not set to an instance of an object while as a Transform it seems to work perfectly fine.

Here is the short script which returned the earlier error. InvisTile is a prefab and the Tile class is derived from MonoBehavior with a simple bool var in it

 GameObject box = Instantiate(InvisTile, new Vector3(x*tileOffsetX,y*tileOffsetY,0),Quaternion.identity) as GameObject;
             Tile properties = box.GetComponent<Tile>();


This works perfectly fine which I do not understand. I thought GameObject are the base class and contains a transform so we should be Instantiating as a GameObject instead of a Transform?

 Transform box = Instantiate(InvisTile, new Vector3(x*tileOffsetX,y*tileOffsetY,0),Quaternion.identity) as Transform;
             Tile properties = box.GetComponent<Tile>();
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avatar image sparkzbarca · Aug 09, 2015 at 04:32 AM 0
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you couldn't have literally just swapped GameObject for Transform.

Object Reference not set to an instance of an object

normally means that something is uninitialized.

to give some examples

if InvisTile was created like say

Public GameObject InvisTile;

but you didnt' assign, it'd throw that error.

I'd try this

Debug.log("InvisTile " + InvisTile); GameObject box = Instantiate(InvisTile, new Vector3(x*tileOffsetX,y*tileOffsetY,0),Quaternion.identity) as GameObject; Debug.log("Box " + box); Debug.log("Box Tile " + box.GetComponent();

           Tile properties = box.GetComponent();

see if anythign is showing box null or invistile null or whatever.

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