Loop over all parts of a model and change alpha

I want to loop through all the parts of my model and change the alpha for each part with a renderer.

Is that possible and how?
This is what I'm thinking.

Code (CSharp):

1.  
2. Color32 col;
3.         foreach (Renderer child in outerEngineModel.GetComponent<Renderer>())
4.         {
5.             col = child.GetComponent<Renderer>().material.GetColor("_Color");
6.             col.a = 255;
7.             child.GetComponent<Renderer>().material.SetColor("_Color", col);
8.            
9.             foreach (Renderer childnested in child.GetComponent<Renderer>())
10.             {
11.                 col = childnested.GetComponent<Renderer>().material.GetColor("_Color");
12.                 col.a = 255;
13.                 childnested.GetComponent<Renderer>().material.SetColor("_Color", col);
14.             }
15.         }

 

You could also just use GetComponentsInChildren<Renderer>() (at the root object outerEngineModel) to come up with an array of Renderers (generally only done at startup), then iterate them as a simple array. That will work no matter how crazily nested your object hierarchy is.

 

The correct answer is what Kurt-Dekker told you. But if you ever need to do this on your own (probably for similar matters) you need to write a recursive function. It's a function that calls itself. something like this:

Code (CSharp):

1. void ChangeAllRenderersAlpha(GameObject o)
2. {
3.     // Do whatever you need to do with this object o
4.  
5.     foreach (GameObject child in o.GetChildren())
6.     {
7.         // it call itself again with all of its children,
8.         // and the children will call it for any of their children and so on
9.         ChangeAllRenderersAlpha(child);
10.     }
11. }

I hope it's useful.

 

Remember: to understand recursion, you must first understand recursion.

 

Thanks for this. I never thought about coding this way. I got it to work using the recursion.