Add Prefab to all Scenes

Archived Forums Questions & Answers
1

Hi,

I want to add a specific new prefab to all scenes and save it permanently to the scene.
I just dont want to open all of my over 50 scenes (levels of a platformer) and drag the prefab in.

Maybe its possible over an editor script?

Thank you

2

I wrote a custom batcher for you. Appreciate me and learn something useful of UnityEditor scripting tools from this.

#if UNITY_EDITOR

using System.IO;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEditor;
using UnityEditor.SceneManagement;

class PrefabSceneBatcher : ScriptableObject {

	[MenuItem("Assets/Create Prefab-Scene Batcher")]
	static void CreateAssetWithSelection() {
		string folder = AssetDatabase.GetAssetPath(Selection.activeObject);
		if (string.IsNullOrEmpty(folder)) {
			folder = "Assets";
		} else if (!Directory.Exists(folder)) {
			folder = Path.GetDirectoryName(folder);
		}
		AssetDatabase.CreateAsset(Selection.activeObject = CreateInstance<PrefabSceneBatcher>(), folder + "/Batcher.asset");
	}

	[CustomEditor(typeof(PrefabSceneBatcher))]
	class CustomIntpector : Editor {

		public override void OnInspectorGUI() {
			EditorGUILayout.PropertyField(serializedObject.FindProperty("m_prefab"));
			EditorGUILayout.PropertyField(serializedObject.FindProperty("m_scenes"));
			serializedObject.ApplyModifiedProperties();
			if (GUILayout.Button("Batch") && EditorUtility.DisplayDialog("Batch", "Can't be undo!", "Batch", "Cancel")) {
				(target as PrefabSceneBatcher).Batch();
			}
		}
	}

	void Batch() {
		foreach (SceneAsset sceneAsset in m_scenes) {
			Scene scene = EditorSceneManager.OpenScene(AssetDatabase.GetAssetPath(sceneAsset), OpenSceneMode.Additive);
			PrefabUtility.InstantiatePrefab(m_prefab, scene);
			EditorSceneManager.SaveScene(scene);
			EditorSceneManager.CloseScene(scene, true);
		}
	}

	[SerializeField] GameObject m_prefab = null;
	[SerializeField] SceneAsset[] m_scenes = new SceneAsset[0];
}

#endif

Usage:

  1. Right click at project window and
    select “Create Prefab-Scene Batcher”.
  2. See the inspector window and I think
    you would know how to do.
3

Thank you for that, but how can I change this, that I not have to put all my 50 scenes into the editor inspector window, instead of loading it directly from dir?