Add 'modules/behaviour_nodes/' from commit 'd51f4da2a9'

git-subtree-dir: modules/behaviour_nodes
git-subtree-mainline: 07d69bf55e
git-subtree-split: d51f4da2a9

modules/behaviour_nodes/behaviour_composite.cpp

@@ -0,0 +1,29 @@
+#include "behaviour_composite.h"
+#include "core/variant/typed_array.h"
+
+void BehaviourComposite::_bind_methods() {}
+
+void BehaviourComposite::child_order_changed() {
+	this->child_behaviours.clear();
+	for (Variant var : get_children()) {
+		if (BehaviourNode * node{ cast_to<BehaviourNode>(var) }) {
+			this->child_behaviours.push_back(node);
+		}
+	}
+}
+
+void BehaviourComposite::_notification(int what) {
+	switch (what) {
+		default:
+			return;
+		case NOTIFICATION_READY:
+			child_order_changed();
+			set_leaf(get_child_behaviours().is_empty());
+			return;
+		case NOTIFICATION_CHILD_ORDER_CHANGED:
+			if (is_ready()) {
+				child_order_changed();
+			}
+			return;
+	}
+}