防止保存对 GameObject 的更改

Question

I'm currently working on an Editor Script in Unity that disables specific GameObjects in a multi scene setup to make the Editor more responsive. I'm working with a setup that has up to 4 Scenes loaded at the same time. Since all these Scenes have many GameObjects in them (I'm talking thousands or even tens of thousands of Objects) the Unity Editor is getting pretty unresponsive and sloppy to use when these Scenes are loaded. Playing and Builds are fine btw, its only the Editor that is unusable. So I'm working on a simple Editor Tool, that disables specific Parent Objects in all loaded Scenes so the Editor is usable again. This Tool works fine, but I want to prevent the changes on these GameObjects from being saved. I intentionally didn't mark the GameObjects as Dirty so Unity doesn't realize when I disable the Objects. Problem is, when I actually work on a Scene and save my work, the disabled GameObjects will be saved aswell, because at this point the Scene will be marked as Dirty. I've already looked into HideFlags but the problem there is, that I can't make Unity only ignore the changes that were made to an Object. HideFlags will only prevent the Object itself from being saved, which is not what I want.

If somebody knows a simple way to make Unity ignore changes on specific GameObjects that would be extremly helpful:)

Alternativly I would be interested in a way that enables me to run custom Code while Unity is saving the Scenes. That way I could make sure, that these GameObjects will be enabled, before Unity saves the Scene.

Thanks in advance

Answer 1

Don't know about preventing dirty objects from saving, doubt it is possible, but to run custom code before Unity saves a scene - easy.

Example editor script (remember it should be placed under Editor/ dir to work as any other editor script)

using UnityEditor;

[InitializeOnLoad]
static class EditorSceneManagerSceneSaved {
    static EditorSceneManagerSceneSaved () {
        UnityEditor.SceneManagement.EditorSceneManager.sceneSaving += OnSceneSaving;
    }

    static void OnSceneSaving (UnityEngine.SceneManagement.Scene scene, string path) {
        UnityEngine.Debug.LogFormat ("Saving scene '{0}' to {1}", scene.name, path);
        /* Do your magic here */
    }
}

Credit for the example goes here , more info on the API here