update model during play mode

delete model right before entering playmode. Model will get replaced
with new model during play.

Author: vkovec

Assets/FbxExporters/Editor/ReviewLastSavedModel.cs

@@ -5,7 +5,8 @@ namespace FbxExporters
 {
     namespace Review
     {
-        class TurnTable
+        [UnityEditor.InitializeOnLoad]
+        public class TurnTable
         {
             const string MenuItemName = "FbxExporters/Turntable Review/Autoload Last Saved Prefab";
 
@@ -21,6 +22,10 @@ public static void OnMenu ()
                 LastSavedModel ();
             }
 
+            static TurnTable(){
+                SubscribeToEvents();
+            }
+
             private static System.IO.FileInfo GetLastSavedFile (string directoryPath, string ext = ".fbx")
             {
                 System.IO.DirectoryInfo directoryInfo = new System.IO.DirectoryInfo (directoryPath);
@@ -206,6 +211,9 @@ private static void SubscribeToEvents ()
                 // ensure we only subscribe once
                 UnityEditor.EditorApplication.hierarchyWindowChanged -= UpdateLastSavedModel;
                 UnityEditor.EditorApplication.hierarchyWindowChanged += UpdateLastSavedModel;
+
+                UnityEditor.EditorApplication.playmodeStateChanged -= OnPlay;
+                UnityEditor.EditorApplication.playmodeStateChanged += OnPlay;
             }
 
             private static void UnsubscribeFromEvents ()
@@ -216,6 +224,7 @@ private static void UnsubscribeFromEvents ()
                 LastFilePath = null;
 
                 UnityEditor.EditorApplication.hierarchyWindowChanged -= UpdateLastSavedModel;
+                UnityEditor.EditorApplication.playmodeStateChanged -= OnPlay;
             }
 
             private static bool AutoUpdateEnabled ()
@@ -225,11 +234,24 @@ private static bool AutoUpdateEnabled ()
 
             private static void UpdateLastSavedModel ()
             {
+                if (!AutoUpdateEnabled ()) {
+                    UnsubscribeFromEvents ();
+                    return;
+                }
 
-                if (AutoUpdateEnabled ()) {
-                    LoadLastSavedModel ();
-                } else {
+                LoadLastSavedModel ();
+            }
+
+            private static void OnPlay()
+            {
+                if (!AutoUpdateEnabled ()) {
                     UnsubscribeFromEvents ();
+                    return;
+                }
+
+                if (UnityEditor.EditorApplication.isPlayingOrWillChangePlaymode && !UnityEditor.EditorApplication.isPlaying) {
+                    UnloadModel (LastModel);
+                    LastModel = null;
                 }
             }
         }