Fix issues with blackboard plan system

blackboard/blackboard_plan.cpp

@@ -88,7 +88,7 @@ void BlackboardPlan::_get_property_list(List<PropertyInfo> *p_list) const {
 		BBVariable var = p.second;
 
 		// * Editor
-		if (!is_derived() || !var_name.begins_with("_")) {
+		if (var.get_type() != Variant::NIL && (!is_derived() || !var_name.begins_with("_"))) {
 			p_list->push_back(PropertyInfo(var.get_type(), var_name, var.get_hint(), var.get_hint_string(), PROPERTY_USAGE_EDITOR));
 		}
 

bt/bt_player.cpp

@@ -193,6 +193,8 @@ void BTPlayer::_notification(int p_notification) {
 #ifdef DEBUG_ENABLED
 				_set_monitor_performance(monitor_performance);
 #endif
+			} else {
+				_update_blackboard_plan();
 			}
 		} break;
 		case NOTIFICATION_ENTER_TREE: {

bt/bt_state.h

@@ -26,14 +26,13 @@ private:
 	StringName success_event;
 	StringName failure_event;
 
-	void _update_blackboard_plan();
-
 protected:
 	static void _bind_methods();
 
 	void _notification(int p_notification);
 
 	virtual bool _should_use_new_scope() const override { return true; }
+	virtual void _update_blackboard_plan() override;
 
 	virtual void _setup() override;
 	virtual void _exit() override;

editor/limbo_ai_editor_plugin.cpp

@@ -215,7 +215,9 @@ void LimboAIEditor::_load_bt(String p_path) {
 	ERR_FAIL_COND_MSG(p_path.is_empty(), "Empty p_path");
 	Ref<BehaviorTree> bt = RESOURCE_LOAD(p_path, "BehaviorTree");
 	ERR_FAIL_COND(!bt.is_valid());
-
+	if (bt->get_blackboard_plan().is_null()) {
+		bt->set_blackboard_plan(memnew(BlackboardPlan));
+	}
 	if (history.find(bt) != -1) {
 		history.erase(bt);
 		history.push_back(bt);

hsm/limbo_state.cpp

@@ -26,6 +26,14 @@
 #ifdef LIMBOAI_GDEXTENSION
 #endif
 
+void LimboState::set_blackboard_plan(const Ref<BlackboardPlan> &p_plan) {
+	blackboard_plan = p_plan;
+	_update_blackboard_plan();
+}
+
+void LimboState::_update_blackboard_plan() {
+}
+
 LimboState *LimboState::get_root() const {
 	const LimboState *state = this;
 	while (state->get_parent() && IS_CLASS(state->get_parent(), LimboState)) {
@@ -159,6 +167,11 @@ void LimboState::clear_guard() {
 
 void LimboState::_notification(int p_what) {
 	switch (p_what) {
+		case NOTIFICATION_READY: {
+			if (Engine::get_singleton()->is_editor_hint()) {
+				_update_blackboard_plan();
+			}
+		} break;
 		case NOTIFICATION_EXIT_TREE: {
 			if (active) {
 				_exit();

hsm/limbo_state.h

@@ -58,6 +58,7 @@ protected:
 	virtual bool _dispatch(const StringName &p_event, const Variant &p_cargo = Variant());
 
 	virtual bool _should_use_new_scope() const { return blackboard_plan.is_valid() || is_root(); }
+	virtual void _update_blackboard_plan();
 
 	virtual void _setup();
 	virtual void _enter();
@@ -72,7 +73,7 @@ protected:
 #endif // LIMBOAI_MODULE
 
 public:
-	void set_blackboard_plan(const Ref<BlackboardPlan> &p_plan) { blackboard_plan = p_plan; }
+	void set_blackboard_plan(const Ref<BlackboardPlan> &p_plan);
 	Ref<BlackboardPlan> get_blackboard_plan() const { return blackboard_plan; }
 
 	Ref<Blackboard> get_blackboard() const { return blackboard; }