editor: Add prefab creation to game object menu.

Author: freezy

Editor/BlueprintProjector.cs

@@ -25,7 +25,7 @@ namespace VisualPinball.Engine.Unity.Hdrp.Editor
 {
 	public static class BlueprintProjector
 	{
-		[MenuItem("GameObject/Visual Pinball/Blueprint Projector", false, 12)]
+		[MenuItem("GameObject/Visual Pinball/Blueprint Projector", false, 15)]
 		private static void CreateBlueprintProjector()
 		{
 			// TODO: Move post-instantiation logic to BP authoring component. Extend to make it simpler to swap projections.

Editor/PrefabCreator.cs

@@ -0,0 +1,64 @@
+// Visual Pinball Engine
+// Copyright (C) 2020 freezy and VPE Team
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+using UnityEditor;
+using UnityEditor.SceneManagement;
+using UnityEngine;
+using UnityEngine.Rendering.HighDefinition;
+using UnityEngine.SceneManagement;
+using VisualPinball.Unity;
+
+namespace VisualPinball.Engine.Unity.Hdrp.Editor
+{
+	public static class PrefabCreator
+	{
+		[MenuItem("GameObject/Visual Pinball/Editor Camera", false, 12)]
+		private static void CreateEditorCamera()
+		{
+			Create(AssetPath.CameraPrefab, "Editor Camera", "Create Editor Camera");
+		}
+
+		[MenuItem("GameObject/Visual Pinball/Editor Post Processing", false, 13)]
+		private static void CreatePostProcessing()
+		{
+			Create(AssetPath.PostProcessPrefab, "Editor Post Processing", "Create Editor Post Processing");
+		}
+
+		[MenuItem("GameObject/Visual Pinball/Editor Lighting", false, 14)]
+		private static void CreateLighting()
+		{
+			Create(AssetPath.LightingPrefab, "Editor Lighting", "Create Editor Lighting");
+		}
+
+		private static void Create(string path, string name, string undoLabel)
+		{
+			var prefab = AssetDatabase.LoadAssetAtPath(path, typeof(GameObject));
+
+			// Spawn the prefab in the scene.
+			var go = (GameObject)PrefabUtility.InstantiatePrefab(prefab);
+			go.name = name;
+			Undo.RegisterCreatedObjectUndo(go, undoLabel);
+
+			// parent
+			var parent = Selection.activeGameObject == null
+				? go.transform.root
+				: Selection.activeGameObject.transform;
+
+			go.transform.SetParent(parent, true);
+			Selection.activeGameObject = go;
+		}
+	}
+}