Change Alpha on individual Texture2Ds

Questions & Answers
1

I want to change just the alpha of individual GUI textures.

I can do this in the OnGuI section like this

var alpha :float;

GUI.color = new Color(1,1,1,alpha);
    GUI.Label (Rect (100,10,128,128), aTexture2D);
    GUI.Label (Rect (200,10,128,128), bTexture2D);
    GUI.Label (Rect (300,10,128,128), cTexture2D);
...

But is there not a more modular way such as putting them in an array, and then cycling through changing the alpha of each Texture2D element in the array, without having to keep writing the coordinates etc. each time?

2

No, but it's easy to make one. Just set this up in Start or Awake, then Call item.DrawMe()

public class MyTexture2D{
    Rect gRect;
    Texture2D tex;
    Color col;

    public MyTexture2D(Rect theRect, Texture2D theTex, Color theColor){
        gRect = theRect;
        col = theColor;
        tex = theTex;
    }

    public void DrawMe(){
        Color tempCol = GUI.color;
        GUI.color = col;
        GUI.Label (gRect, tex);
        GUI.color = tempCol;
    }

    public Color color{
        get{
            return col; 
        }   
        set{
            col = value;    
        }
    }
}

and example usage:

public class MyGUI : MonoBehaviour {

    public Texture2D aTex;//actual texture
    MyTexture2D thing;
    public float alpha;

    void Start(){
        thing = new MyTexture2D(new Rect(100,10,128,128), 
                    aTex,
                    new Color(1,1,1,alpha));
    }
    void OnGUI(){
        thing.DrawMe();
    }
}