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Question by Aceria · Jun 04, 2012 at 08:06 PM · grid

2D Grid, accessing in different gameObject

I have the following code: var grid : GameObject[,];

 function Start(){
     grid = new GameObject[gridSizeX, gridSizeY];
     for(var y : int = 0; y < gridSizeY; y++){
         for(var x : int = 0; x < gridSizeX; x++){
             var s : GameObject = Instantiate(square, Vector3(transform.position.x-(x * (square.renderer.bounds.size.x)), transform.position.y, transform.position.z+(y * (square.renderer.bounds.size.z))), Quaternion.identity);
             grid[x, y] = s;
         }
     }
 }

And then in a different object:

 function Start(){
     gridData = gameObject.Find("Grid").GetComponent("DefenseGrid");
     Debug.Log(gridData);
 }
 
 function OnMouseOver(){
     gridData.grid[1,2].renderer.material.color = Color.red;
     renderer.material.color = Color.red;
 }

This throws the error: "MissingFieldException: Field 'UnityEngine.GameObject[,].' not found. This doesn't make any sense to me at all, since when I do tests in the first object, I can access the array properly.

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Answer by bompi88 · Jun 05, 2012 at 12:03 AM

It worked for me. I used:

 //DefenseGrid.js
 var grid : GameObject[,];
 var gridSizeX : int;
 var gridSizeY : int;
 var square : GameObject;
 
     function Start(){
         grid = new GameObject[gridSizeX, gridSizeY];
         for(var y : int = 0; y < gridSizeY; y++){
            for(var x : int = 0; x < gridSizeX; x++){
              var s : GameObject = GameObject.Instantiate(square, Vector3(transform.position.x-(x * (square.renderer.bounds.size.x)), transform.position.y, transform.position.z+(y * (square.renderer.bounds.size.z))), Quaternion.identity);
              grid[x, y] = s;
            }
         }
     }

and:

 //WhateverGrid.js
     var gridData : DefenseGrid;
     
     function Start(){
         gridData = GameObject.Find("Grid").GetComponent("DefenseGrid");
     }
     
     function OnMouseOver(){
         gridData.grid[1,2].renderer.material.color = Color.red;
         renderer.material.color = Color.red;
     }

Be sure you write "defense" all over in your script, and not some "defense" and some "defence". Maybe that triggered your error somehow. I did that mistake once. :S I have never been so frustrated, I could not understand what I did wrong; the code were free of errors elsewhere. Defence and defense are different spellings of the same word :)

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