Changing the mainTexture of a Instantiated prefab

I have a project where initially there will be no Game Objects in the scene hierarchy other than a control script. I have several prefabs that share a script whose purpose is to switch the main diffuse texture. The script has 8 slots to define the textures to use. When I use this script to switch the texture the prefab object that I am updating switches to 'Type mismatch' while the game is running and then the materials that were assigned to the prefab become 'Missing (Material)' when the game stops running. I am on a Mac running 3.5.7f6. I do not see the texture change in the game view. However, if the object is selected then the small preview window does show the changes to the texture. I am totally confused.

 

it would be more useful to see the relevant part of the script than have it described...

 

bool updateTexture(int id){
Debug.Log (TAG + "updateTexture to " + id + " of " + this.textures.Count);
//count++;
if (id<0 || id>textures.Count){
return false;
}
Texture texture = textures[id];
if (texture == null){
Debug.Log (TAG + "updateTexture texure is null");
}else{
Debug.Log (TAG + "updateTexture to " + texture.ToString());
Transform tran = gameObject.transform.GetChild (1);
if (tran==null){
Debug.Log (TAG + "updateTexture child not found");
}else{
GameObject obj = tran.gameObject;
if (obj==null){
Debug.Log (TAG + "changeTexture gameObject not found");
}else{
MeshRenderer currentRenderer = obj.GetComponent<MeshRenderer>();
if (currentRenderer != null){
currentRenderer.material.mainTexture = texture;
Debug.Log (TAG + "updateTexture " + currentRenderer.materials.Length + " materials amended");
texId = newTexId;
}else{
Debug.Log (TAG + "updateTexture no MeshRenderer");
return false;
}

return true;
}
}
}
return false;
}

Sorry about the formatting - it seems to trash the identing

 

Problem appears to be the way I am calling a script attached to a prefab that has been created using Instantiate. More research needed about the scope of scripts using Instantiation. If I restrict all my code to the script for a prefab it all works fine. If instead I try to call the scripts in the instantiated prefabs using a master control script, I get the issues I have been having problems with.

 

Click the "Go Advanced" button in the bottom ricght and then click the "Wrap code tags around selected text" button.

Code (csharp):

1.  
2. bool updateTexture(int id){
3.  
4.    Debug.Log (TAG + "updateTexture to " + id + " of " + this.textures.Count);
5.    
6.    //count++;
7.    if (id<0 || id>textures.Count){
8.       return false;
9.    }
10.    
11.     Texture texture = textures[id];
12.     if (texture == null){
13.  
14.         Debug.Log (TAG + "updateTexture texure is null");
15.  
16.     }else{
17.  
18.         Debug.Log (TAG + "updateTexture to " + texture.ToString());
19.         Transform tran = gameObject.transform.GetChild (1);
20.      
21.         if (tran==null){
22.  
23.            Debug.Log (TAG + "updateTexture child not found");
24.  
25.         }else{
26.  
27.             GameObject obj = tran.gameObject;
28.          
29.             if (obj==null){
30.  
31.                 Debug.Log (TAG + "changeTexture gameObject not found");
32.          
33.             }else{
34.            
35.                 MeshRenderer currentRenderer = obj.GetComponent<MeshRenderer>();
36.            
37.                 if (currentRenderer != null){
38.  
39.                    currentRenderer.material.mainTexture = texture;
40.                    Debug.Log (TAG + "updateTexture " + currentRenderer.materials.Length + " materials amended");
41.                    texId = newTexId;
42.  
43.                 }else{
44.  
45.                     Debug.Log (TAG + "updateTexture no MeshRenderer");
46.                     return false;
47.             }
48.                    
49.             return true;
50.         }
51.      }
52.    }
53.    return false;
54. }

 

Fixed this. My issue was the way I was Instantiating the prefab not the texture switching code.