Error CS0120

Unity Engine
1

I keep getting the error CS0120: An object reference is required to access non-static member ‘SimpleAI.Grid.GetCellIndex(UnityEngine.Vector3)’.

Here is the code the error is coming from:

	void OnClick()
	{		Vector3 gridPos = TouchHandler.worldPos; 
		int gridnum = SimpleAI.Grid.GetCellIndex(gridPos);
}

Here is the GetCellIndex code:

   public int GetCellIndex(Vector3 pos)
	    {
			if ( !IsInBounds(pos) )
			{
				return SimpleAI.Planning.Node.kInvalidIndex;	
			}
			
			pos -= Origin;
			
	        int col = (int)(pos.x / m_cellSize);
	        int row = (int)(pos.z / m_cellSize);
			
	        return (row * m_numberOfColumns + col);
	    }

I’m new to Unity and C# so forgive me cause I know this error will probably be an easy fix. I’ve looked up the error and just can’t seem to wrap my head around what the problem is.

2

I imagine SimpleAI has some static objects in it, which you would be able to access without a reference, but it’s saying in this case you are trying to access non static information, so you need a reference like:
SimpleAI script = gameObject.Find(SimpleAIobject.GetComponent();
script.Grid.blah blah;