Enter Prefab Mode via script

Hello!

I'm making to tool to help design our game, and I would like to know if there is a way to enter the new Prefab Mode via script in edit mode, and have it showing in the "preview" scene view with the breadcrumbs etc, exactly as if I had double clicked on the prefab from the project window.

Thanks~

 

So what does

PrefabUtility.LoadPrefabContents

use for? I called it and nothing happened.

 

It does what the documentation says:



There's even a whole example there of how to use the function:

Code (csharp):

1. using UnityEngine;
2. using UnityEditor;
3.  
4. public class Example
5. {
6.    [MenuItem("Examples/Add BoxCollider to Prefab Asset")]
7.    static void AddBoxColliderToPrefab()
8.    {
9.        // Get the Prefab Asset root GameObject and its asset path.
10.        GameObject assetRoot = Selection.activeObject as GameObject;
11.        string assetPath = AssetDatabase.GetAssetPath(assetRoot);
12.  
13.         // Load the contents of the Prefab Asset.
14.        GameObject contentsRoot = PrefabUtility.LoadPrefabContents(assetPath);
15.  
16.         // Modify Prefab contents.
17.        contentsRoot.AddComponent<BoxCollider>();
18.  
19.         // Save contents back to Prefab Asset and unload contents.
20.        PrefabUtility.SaveAsPrefabAsset(contentsRoot, assetPath);
21.        PrefabUtility.UnloadPrefabContents(contentsRoot);
22.    }
23.  
24.     [MenuItem("Examples/Add BoxCollider to Prefab Asset", true)]
25.    static bool ValidateAddBoxColliderToPrefab()
26.    {
27.        GameObject go = Selection.activeObject as GameObject;
28.        if (go == null)
29.            return false;
30.  
31.         return PrefabUtility.IsPartOfPrefabAsset(go);
32.    }
33. }

 

@Baste Ok, it's my fault.
I have read the document and I thought it would open the prefab in prefab mode, but it didn't, so I asked the question.

I should make a full test before asking.

 

Right!

So it does actually open the prefab into an isolated scene - just not one that's visible. The consequence of that is that adding things to the prefab or modifying it or whatever will not dirty the current scene.

It's somewhat a leaked implementation detail - what a scene is internally in Unity is slightly different from what it is to Unity users.