Help please. Trouble accessing a component of an Instance

Unity Engine
1

Hi guys,

Consider the following code…

function OnMouseOver(){
 if(Input.GetMouseButton(1))
  {
   var aCopy : GameObject = Instantiate(GameObject.Find("aTile"), transform.position, transform.rotation);
  }	
}

Now, I am trying to access a “3D Text” object that is a child of aTile and set its Text property but not sure how to do this after I create the instance.

I cant search for the component by name as there maybe other instances?

Basically I want the user to right click a tile object, this creates a duplicate tile at the same position with a 3D text object on it, this tile then flys off up the screen.

Any help please as I’m stumped.

Thanks
Geoff

2

aCopy is pointing to the instance that you just created, so aCopy.GetComponent(…) should do the trick.

3

Hi

I tried that initially as:

aCopy.GetComponent(“aLetter”).Text = “DONE”;

But this throws a NullReferenceException error

Also tried:

aCopy.GetComponent(aLetter).Text = “DONE”;

which didnt work either.

Thanks
Geoff

4

is aLetter a TextMesh object?
try something like this:

aCopy.GetComponent(TextMesh).Text = "DONE";
5

Yeah, its a Text Mesh but that produces the following error:

MissingFieldException: Field 'UnityEngine.TextMesh.Text' not found.

Thanks anyway
Geoff

6

OK one last try. the .text should have been lowercase:

aCopy.GetComponent(TextMesh).text = "DONE";

If that doesn’t work, I give up :cry:

7

That didn’t work, that is trying to access a TextMesh on aTile rather than the child component called Letter.

MissingComponentException: There is no ‘TextMesh’ attached to the “aTile(Clone)” game object, but a script is trying to access it.
You probably need to add a TextMesh to the game object “aTile(Clone)”. Or your script needs to check if the component is attached before using it.

Screen shot attached from a paused state.

Thanks for trying anyway, its appreciated.

Geoff

188583--6676--$scr_871.jpg
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8

Hiya,

I can suggest these links for reading on how to access objects/components.

http://unity3d.com/support/documentation/ScriptReference/index.Accessing_Other_Components.html

http://unity3d.com/support/documentation/ScriptReference/index.Accessing_Other_Game_Objects.html

In respects to your current question, I think you want to do something like this in my horrible JS pseeudocode:

var objectToInstantiate : TextMesh;

function OnMouseDown(){
    TextMesh clonedObj = Instantiate(objecttoInstantiate);

clonedObj.text = "Whatever you want it to show.";
}
9

As mentioned on IRC, here is a modified version in case you wish to do stuff on the parent and want the TextMesh gotten as a child.

Same as before:

var objectToInstantiate : Transform; 

function OnMouseDown(){ 
    Transform clonedObj = Instantiate(objecttoInstantiate); 

    // Get the TextMesh component.
    TextMesh myTextMesh = clonedObj.GetComponentInChildren(TextMesh);
    
    // Check for null else bad things could happen.
    if(myTextMesh != null){
        myTextMesh.text = "Yeeehaw!";
    } else
        Debug.LogError("Could not find TextMesh component.");
}
10

That done it thanks matey :slight_smile: :slight_smile: :slight_smile:

function OnMouseOver(){
	
	if(Input.GetMouseButton(1)){
	
	var clonedObj : Transform = Instantiate(objectToInstantiate);

    // Get the TextMesh component.
    var myTextMesh : TextMesh = clonedObj.GetComponentInChildren(TextMesh);
   
    // Check for null else bad things could happen.
    if(myTextMesh != null){
        myTextMesh.text = "Yeeehaw!";
    } else
        Debug.LogError("Could not find TextMesh component.");
		//var aCopy : GameObject = Instantiate(GameObject.Find("aTile"), transform.position, transform.rotation);
	}	
}