feat: backlog code

behaviour_node.cpp

@@ -0,0 +1,29 @@
+#include "behaviour_node.h"
+#include "behaviour_nodes/behaviour_tree.h"
+#include "core/config/engine.h"
+
+void BehaviourNode::_bind_methods() {
+	BIND_ENUM_CONSTANT(Fail);
+	BIND_ENUM_CONSTANT(Running);
+	BIND_ENUM_CONSTANT(Success);
+}
+
+void BehaviourNode::_notification(int what) {
+	if (Engine::get_singleton()->is_editor_hint()) {
+		return;
+	}
+	switch (what) {
+		default:
+			return;
+		case NOTIFICATION_ENTER_TREE:
+			Node *parent{ get_parent() };
+			this->parent = cast_to<BehaviourNode>(parent);
+			while (this->behaviour_tree == nullptr && parent != nullptr) {
+				if ((this->behaviour_tree = cast_to<BehaviourTree>(parent))) {
+					break;
+				}
+				parent = parent->get_parent();
+			}
+			return;
+	}
+}