CreatePrefabFromSelected

Author: Matthew Miner (matthew@matthewminer.com)

Description

Creates a prefab containing the contents of the currently selected game object.

Usage

Place the script inside the Editor folder. Select a GameObject and choose 'GameObject > Create Prefab From Selection'. A new prefab will be created in the root directory bearing the same name as the GameObject.

Faults:

To Do

• Currently the script replaces any existing prefab with the same name; more desirable would be to append a number to the filename of the new prefab
• The selected GameObject should become an instance of the newly created prefab

C# - CreatePrefabFromSelected.cs

using UnityEditor;
using UnityEngine;
 
class CreatePrefabFromSelected
{
	const string menuTitle = "GameObject/Create Prefab From Selected";
 
	/// <summary>
	/// Creates a prefab from the selected game object.
	/// </summary>
	[MenuItem (menuTitle)]
	static void CreatePrefab ()
	{
		GameObject obj = Selection.activeGameObject;
		string name = obj.name;
 
		Object prefab = EditorUtility.CreateEmptyPrefab("Assets/" + name + ".prefab");
		EditorUtility.ReplacePrefab(obj, prefab);
		AssetDatabase.Refresh();
	}
 
	/// <summary>
	/// Validates the menu.
	/// </summary>
	/// <remarks>The item will be disabled if no game object is selected.</remarks>
	[MenuItem (menuTitle, true)]
	static bool ValidateCreatePrefab ()
	{
		return Selection.activeGameObject != null;
	}
}

C# - Updated CreatePrefabFromSelected.cs

I decided to update this script in can anybody is intewrested. It now will give a popup if the prefab already exits and you can choose to overwrite the prefab or cancel. It also replaces the selected gameObject with the new prefab.

• Cameron Bonde

- Updated to accept multiple selected objects and not use /prefabs folder (without it it deletes the GO without creating prefab)

- Fixed the script to make sure the new object have the same parent as the old one in the scene. --Blikstad 06:11, 20 May 2012 (PDT)

- Extended with choice of save folder by winxalex

using UnityEditor;
using UnityEngine;
using System.Collections;
 
class CreatePrefabFromSelected : ScriptableObject
{
    const string menuTitle = "GameObject/Create Prefab From Selected";
 
    /// <summary>
    /// Creates a prefab from the selected game object.
    /// </summary>
    [MenuItem(menuTitle)]
    static void CreatePrefab()
    {
             var objs = Selection.gameObjects;
 
			string pathBase = EditorUtility.SaveFolderPanel ("Choose save folder", "Assets", "");
 
			if (!String.IsNullOrEmpty (pathBase)) {
 
				pathBase=pathBase.Remove(0,pathBase.IndexOf("Assets"))+Path.DirectorySeparatorChar;
 
								foreach (var go in objs) {
										String localPath = pathBase + go.name + ".prefab";
 
										if (AssetDatabase.LoadAssetAtPath (localPath, typeof(GameObject))) {
												if (EditorUtility.DisplayDialog ("Are you sure?", 
						                                "The prefab already exists. Do you want to overwrite it?", 
						                                "Yes", 
						                                "No"))
														CreateNew (go, localPath);
										} else
												CreateNew (go, localPath);
								}
						}
    }
 
    static void createNew(GameObject obj, string localPath)
    {
        Object prefab = PrefabUtility.CreatePrefab (localPath, obj);
        EditorUtility.ReplacePrefab(obj, prefab, ReplacePrefabOptions.ConnectToPrefab);
        AssetDatabase.Refresh();
    }
 
    /// <summary>
    /// Validates the menu.
    /// </summary>
    /// <remarks>The item will be disabled if no game object is selected.</remarks>
    [MenuItem(menuTitle, true)]
    static bool ValidateCreatePrefab()
    {
        return Selection.activeGameObject != null;
    }
}

C# - CreatePrefabFromSelected.cs Procedural Mesh Version

Small update for procedural mesh creations: it saves the created mesh to disk and inside a prefab, instead of losing it, and keeps all prefab size, shader, collider, and script settings in 1 prefab.

Requires that you have a folder called Assets/savedMesh

using UnityEditor;
using UnityEngine;
 
/// <summary>
/// Saves mesh and entire prefab from gameview, your procedural mesh prefab is saved.
/// </summary>
class CreatePrefabFromSelected
{
	const string menuName = "GameObject/Create Prefab From Selected";
 
	/// <summary>
	/// Adds a menu named "Create Prefab From Selected" to the GameObject menu.
	/// </summary>
	[MenuItem(menuName)]
	static void CreatePrefabMenu ()
	{
		var go = Selection.activeGameObject;
 
		Mesh m1 = go.GetComponent<MeshFilter>().mesh;//update line1
		AssetDatabase.CreateAsset(m1, "Assets/savedMesh/" + go.name +"_M" + ".asset"); // update line2
 
 
		var prefab = EditorUtility.CreateEmptyPrefab("Assets/savedMesh/" + go.name + ".prefab");
		EditorUtility.ReplacePrefab(go, prefab);
		AssetDatabase.Refresh();
	}
 
	/// <summary>
	/// Validates the menu.
	/// The item will be disabled if no game object is selected.
	/// </summary>
	/// <returns>True if the menu item is valid.</returns>
	[MenuItem(menuName, true)]
	static bool ValidateCreatePrefabMenu ()
	{
		return Selection.activeGameObject != null;
	}
}