Editor Scripting: Toggle GameObjects static / non-static when Lightmapping starts / ends

Unity Engine
1

Hey guys,
I know this is kind of weird, but I would like to have the following behaviour:
As soon as I click Generate Lighting I want a selection of GameObjects to toggle themselves static and - when Lightmapping ends - to untoggle themselves again.
I know there is events for the Lightmapping parts, but I have no idea about Editor Scripting.
Do I add a script to all my relevant gameobjects? Do I provide a list to a Editor Script?
Any help is greatly appreciated.
Thanks.

2

I’d approach this by exposing a callback receiver interface like this:

public interface ILightmapBakeCallbackReceiver
{
    void OnLightmapBakeStarted();
    void OnLightmapBakeCompleted();
}

And then implementing support for the interface by using [InitializeOnLoadMethod] to subscribe to the lightmapping events:

static class LightmapBakeCallbackManager
{
    [InitializeOnLoadMethod]
    static void InitializeCallbacks()
    {
        Lightmapping.bakeStarted   += () => OnBakeStarted(SceneManager.GetActiveScene());
        Lightmapping.bakeCompleted += () => OnBakeCompleted(SceneManager.GetActiveScene());
    }

    static void OnBakeStarted(Scene scene)
    {
        foreach (var receiver in EnumerateComponentsInScene<ILightmapBakeCallbackReceiver>(scene, false))
            receiver.OnLightmapBakeStarted();
    }

    static void OnBakeCompleted(Scene scene)
    {
        foreach (var receiver in EnumerateComponentsInScene<ILightmapBakeCallbackReceiver>(scene, false))
            receiver.OnLightmapBakeCompleted();
    }

    static IEnumerable<T> EnumerateComponentsInScene<T>(Scene scene, bool includeInactive)
    {
        foreach (GameObject root in scene.GetRootGameObjects())
        {
            foreach (T component in root.GetComponentsInChildren<T>(includeInactive))
            {
                yield return component;
            }
        }
    }
}

With all of these pieces in place, you can then implement your desired functionality with a component:

class MakeStaticDuringLightmapBake : MonoBehaviour, ILightmapBakeCallbackReceiver
{
    public void OnLightmapBakeStarted()
    {
        gameObject.isStatic = true;
    }

    public void OnLightmapBakeCompleted()
    {
        gameObject.isStatic = false;
    }
}
2 Likes
3

Holy Mother, that’s way more support then I expected. Thanks so much. Greatly appreciated!

1 Like