2 files changed, 21 insertions, 0 deletions
diff --git a/scene/resources/packed_scene.cpp b/scene/resources/packed_scene.cpp
index f8283bb5ca..443d1630a7 100644
--- a/scene/resources/packed_scene.cpp
+++ b/scene/resources/packed_scene.cpp
@@ -1537,6 +1537,7 @@ void SceneState::add_editable_instance(const NodePath& p_path){
 SceneState::SceneState() {
 
 	base_scene_idx=-1;
+	last_modified_time=0;
 }
 
 
@@ -1596,6 +1597,15 @@ Node *PackedScene::instance(bool p_gen_edit_state) const {
 	return s;
 }
 
+void PackedScene::recreate_state() {
+
+	state = Ref<SceneState>( memnew( SceneState ));
+	state->set_path(get_path());
+#ifdef TOOLS_ENABLED
+	state->set_last_modified_time(get_last_modified_time());
+#endif
+}
+
 Ref<SceneState> PackedScene::get_state() {
 
 	return state;
@@ -1607,6 +1617,7 @@ void PackedScene::set_path(const String& p_path,bool p_take_over) {
 	Resource::set_path(p_path,p_take_over);
 }
 
+
 void PackedScene::_bind_methods() {
 
 	ObjectTypeDB::bind_method(_MD("pack","path:Node"),&PackedScene::pack);
diff --git a/scene/resources/packed_scene.h b/scene/resources/packed_scene.h
index f3ec0afb6d..67d0f4ba01 100644
--- a/scene/resources/packed_scene.h
+++ b/scene/resources/packed_scene.h
@@ -99,6 +99,8 @@ class SceneState : public Reference {
 
 	String path;
 
+	uint64_t last_modified_time;
+
 	_FORCE_INLINE_ Ref<SceneState> _get_base_scene_state() const;
 
 	static bool disable_placeholders;
@@ -162,6 +164,9 @@ public:
 	void add_connection(int p_from,int p_to, int p_signal, int p_method, int p_flags,const Vector<int>& p_binds);
 	void add_editable_instance(const NodePath& p_path);
 
+	virtual void set_last_modified_time(uint64_t p_time) { last_modified_time=p_time; }
+	uint64_t get_last_modified_time() const { return last_modified_time; }
+
 
 	SceneState();
 };
@@ -189,8 +194,13 @@ public:
 	bool can_instance() const;
 	Node *instance(bool p_gen_edit_state=false) const;
 
+	void recreate_state();
+
 	virtual void set_path(const String& p_path,bool p_take_over=false);
+#ifdef TOOLS_ENABLED
+	virtual void set_last_modified_time(uint64_t p_time) { state->set_last_modified_time(p_time); }
 
+#endif
 	Ref<SceneState> get_state();
 
 	PackedScene();