Scripts not updating the material's shader properties

Question

Hello, I have a list of GameObjects and their materials that I'm trying to apply changes to via C# scripts.

I run this function every Update()

 void Warp() {
         foreach (GameObject obj in Objects)
         {
             obj.GetComponent<MeshRenderer>().sharedMaterial.SetVector("Offset", new Vector4(-10, 50, 30, 40));
             Debug.Log(obj.GetComponent<MeshRenderer>().sharedMaterial.name);
         }
     }

According to my debug logs, it's affecting all of the GameObjects in the list properly, yet when I run it there are NO noticeable changes to the Offset vector in the game AND in the inspector.

This topic seems to explain the same issue, and a comment there suggests that it has to do with the inspector dictating the values in the shader instead of the script. However, when I close the inspector, nothing happens still.

Any ideas on why this happens?

Answer 1

Answer by KnightNobody · Oct 26, 2015 at 12:31 PM

In this case you should use a for loop instead of a foreach

The foreach will take an element and this will be used as a temporary variable

 for(int i = 0; i <= Objects.lenght -1; i++)
 {
              Objects[i].GetComponent<MeshRenderer>().sharedMaterial.SetVector("Offset", new Vector4(-10, 50, 30, 40));
              Debug.Log(Objects[i].GetComponent<MeshRenderer>().sharedMaterial.name);
 }

This should work I think :D @bradyw24

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bradyw24 · Oct 27, 2015 at 12:41 AM 0

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Thanks, but it's still not working :/

It's an issue with Unity. I've also tried to update the shader values from within each Object's Update() and it still doesn't work.

Scripts not updating the material's shader properties

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