Merge pull request #52131 from nekomatata/fix-blend-tree-reset

Fix AnimationBlendTree reset on resource loading

scene/animation/animation_blend_tree.cpp

@@ -1124,6 +1124,7 @@ void AnimationNodeBlendTree::_get_property_list(List<PropertyInfo> *p_list) cons
 void AnimationNodeBlendTree::reset_state() {
 	graph_offset = Vector2();
 	nodes.clear();
+	_initialize_node_tree();
 	emit_changed();
 	emit_signal(SNAME("tree_changed"));
 }
@@ -1162,7 +1163,7 @@ void AnimationNodeBlendTree::_bind_methods() {
 	BIND_CONSTANT(CONNECTION_ERROR_CONNECTION_EXISTS);
 }
 
-AnimationNodeBlendTree::AnimationNodeBlendTree() {
+void AnimationNodeBlendTree::_initialize_node_tree() {
 	Ref<AnimationNodeOutput> output;
 	output.instantiate();
 	Node n;
@@ -1172,5 +1173,9 @@ AnimationNodeBlendTree::AnimationNodeBlendTree() {
 	nodes["output"] = n;
 }
 
+AnimationNodeBlendTree::AnimationNodeBlendTree() {
+	_initialize_node_tree();
+}
+
 AnimationNodeBlendTree::~AnimationNodeBlendTree() {
 }

scene/animation/animation_blend_tree.h

@@ -345,6 +345,8 @@ class AnimationNodeBlendTree : public AnimationRootNode {
 	void _tree_changed();
 	void _node_changed(const StringName &p_node);
 
+	void _initialize_node_tree();
+
 protected:
 	static void _bind_methods();
 	bool _set(const StringName &p_name, const Variant &p_value);