Merge pull request #68922 from TokageItLab/fix-animtree-crash

Fix `AnimationTreeEditor` crash & rename `AnimationTreeEditor::get_tree()` to `get_animation_tree()`

6 files changed, 56 insertions, 43 deletions

diff --git a/editor/plugins/animation_blend_space_1d_editor.cpp b/editor/plugins/animation_blend_space_1d_editor.cpp
index f16a6bfa88..d11217cc5e 100644
--- a/editor/plugins/animation_blend_space_1d_editor.cpp
+++ b/editor/plugins/animation_blend_space_1d_editor.cpp
@@ -69,7 +69,7 @@ void AnimationNodeBlendSpace1DEditor::_blend_space_gui_input(const Ref<InputEven
 
 			menu->add_submenu_item(TTR("Add Animation"), "animations");
 
-			AnimationTree *gp = AnimationTreeEditor::get_singleton()->get_tree();
+			AnimationTree *gp = AnimationTreeEditor::get_singleton()->get_animation_tree();
 			ERR_FAIL_COND(!gp);
 
 			if (gp->has_node(gp->get_animation_player())) {
@@ -177,7 +177,7 @@ void AnimationNodeBlendSpace1DEditor::_blend_space_gui_input(const Ref<InputEven
 		blend_pos *= blend_space->get_max_space() - blend_space->get_min_space();
 		blend_pos += blend_space->get_min_space();
 
-		AnimationTreeEditor::get_singleton()->get_tree()->set(get_blend_position_path(), blend_pos);
+		AnimationTreeEditor::get_singleton()->get_animation_tree()->set(get_blend_position_path(), blend_pos);
 		blend_space_draw->queue_redraw();
 	}
 
@@ -200,7 +200,7 @@ void AnimationNodeBlendSpace1DEditor::_blend_space_gui_input(const Ref<InputEven
 		blend_pos *= blend_space->get_max_space() - blend_space->get_min_space();
 		blend_pos += blend_space->get_min_space();
 
-		AnimationTreeEditor::get_singleton()->get_tree()->set(get_blend_position_path(), blend_pos);
+		AnimationTreeEditor::get_singleton()->get_animation_tree()->set(get_blend_position_path(), blend_pos);
 
 		blend_space_draw->queue_redraw();
 	}
@@ -298,7 +298,7 @@ void AnimationNodeBlendSpace1DEditor::_blend_space_draw() {
 			color.a *= 0.5;
 		}
 
-		float point = AnimationTreeEditor::get_singleton()->get_tree()->get(get_blend_position_path());
+		float point = AnimationTreeEditor::get_singleton()->get_animation_tree()->get(get_blend_position_path());
 
 		point = (point - blend_space->get_min_space()) / (blend_space->get_max_space() - blend_space->get_min_space());
 		point *= s.width;
@@ -568,10 +568,10 @@ void AnimationNodeBlendSpace1DEditor::_notification(int p_what) {
 		case NOTIFICATION_PROCESS: {
 			String error;
 
-			if (!AnimationTreeEditor::get_singleton()->get_tree()->is_active()) {
+			if (!AnimationTreeEditor::get_singleton()->get_animation_tree()->is_active()) {
 				error = TTR("AnimationTree is inactive.\nActivate to enable playback, check node warnings if activation fails.");
-			} else if (AnimationTreeEditor::get_singleton()->get_tree()->is_state_invalid()) {
-				error = AnimationTreeEditor::get_singleton()->get_tree()->get_invalid_state_reason();
+			} else if (AnimationTreeEditor::get_singleton()->get_animation_tree()->is_state_invalid()) {
+				error = AnimationTreeEditor::get_singleton()->get_animation_tree()->get_invalid_state_reason();
 			}
 
 			if (error != error_label->get_text()) {
diff --git a/editor/plugins/animation_blend_space_2d_editor.cpp b/editor/plugins/animation_blend_space_2d_editor.cpp
index 3ec8324e1d..0adac598a6 100644
--- a/editor/plugins/animation_blend_space_2d_editor.cpp
+++ b/editor/plugins/animation_blend_space_2d_editor.cpp
@@ -115,7 +115,7 @@ void AnimationNodeBlendSpace2DEditor::_blend_space_gui_input(const Ref<InputEven
 			ClassDB::get_inheriters_from_class("AnimationRootNode", &classes);
 			menu->add_submenu_item(TTR("Add Animation"), "animations");
 
-			AnimationTree *gp = AnimationTreeEditor::get_singleton()->get_tree();
+			AnimationTree *gp = AnimationTreeEditor::get_singleton()->get_animation_tree();
 			ERR_FAIL_COND(!gp);
 			if (gp && gp->has_node(gp->get_animation_player())) {
 				AnimationPlayer *ap = Object::cast_to<AnimationPlayer>(gp->get_node(gp->get_animation_player()));
@@ -270,7 +270,7 @@ void AnimationNodeBlendSpace2DEditor::_blend_space_gui_input(const Ref<InputEven
 		blend_pos *= (blend_space->get_max_space() - blend_space->get_min_space());
 		blend_pos += blend_space->get_min_space();
 
-		AnimationTreeEditor::get_singleton()->get_tree()->set(get_blend_position_path(), blend_pos);
+		AnimationTreeEditor::get_singleton()->get_animation_tree()->set(get_blend_position_path(), blend_pos);
 
 		blend_space_draw->queue_redraw();
 	}
@@ -306,7 +306,7 @@ void AnimationNodeBlendSpace2DEditor::_blend_space_gui_input(const Ref<InputEven
 		blend_pos *= (blend_space->get_max_space() - blend_space->get_min_space());
 		blend_pos += blend_space->get_min_space();
 
-		AnimationTreeEditor::get_singleton()->get_tree()->set(get_blend_position_path(), blend_pos);
+		AnimationTreeEditor::get_singleton()->get_animation_tree()->set(get_blend_position_path(), blend_pos);
 
 		blend_space_draw->queue_redraw();
 	}
@@ -589,7 +589,7 @@ void AnimationNodeBlendSpace2DEditor::_blend_space_draw() {
 			color.a *= 0.5;
 		}
 
-		Vector2 blend_pos = AnimationTreeEditor::get_singleton()->get_tree()->get(get_blend_position_path());
+		Vector2 blend_pos = AnimationTreeEditor::get_singleton()->get_animation_tree()->get(get_blend_position_path());
 		Vector2 point = blend_pos;
 
 		point = (point - blend_space->get_min_space()) / (blend_space->get_max_space() - blend_space->get_min_space());
@@ -797,12 +797,12 @@ void AnimationNodeBlendSpace2DEditor::_notification(int p_what) {
 		case NOTIFICATION_PROCESS: {
 			String error;
 
-			if (!AnimationTreeEditor::get_singleton()->get_tree()) {
+			if (!AnimationTreeEditor::get_singleton()->get_animation_tree()) {
 				error = TTR("BlendSpace2D does not belong to an AnimationTree node.");
-			} else if (!AnimationTreeEditor::get_singleton()->get_tree()->is_active()) {
+			} else if (!AnimationTreeEditor::get_singleton()->get_animation_tree()->is_active()) {
 				error = TTR("AnimationTree is inactive.\nActivate to enable playback, check node warnings if activation fails.");
-			} else if (AnimationTreeEditor::get_singleton()->get_tree()->is_state_invalid()) {
-				error = AnimationTreeEditor::get_singleton()->get_tree()->get_invalid_state_reason();
+			} else if (AnimationTreeEditor::get_singleton()->get_animation_tree()->is_state_invalid()) {
+				error = AnimationTreeEditor::get_singleton()->get_animation_tree()->get_invalid_state_reason();
 			} else if (blend_space->get_triangle_count() == 0) {
 				error = TTR("No triangles exist, so no blending can take place.");
 			}
diff --git a/editor/plugins/animation_blend_tree_editor_plugin.cpp b/editor/plugins/animation_blend_tree_editor_plugin.cpp
index 6d00e77a4b..1a4774b98b 100644
--- a/editor/plugins/animation_blend_tree_editor_plugin.cpp
+++ b/editor/plugins/animation_blend_tree_editor_plugin.cpp
@@ -96,7 +96,7 @@ Size2 AnimationNodeBlendTreeEditor::get_minimum_size() const {
 }
 
 void AnimationNodeBlendTreeEditor::_property_changed(const StringName &p_property, const Variant &p_value, const String &p_field, bool p_changing) {
-	AnimationTree *tree = AnimationTreeEditor::get_singleton()->get_tree();
+	AnimationTree *tree = AnimationTreeEditor::get_singleton()->get_animation_tree();
 	updating = true;
 	undo_redo->create_action(TTR("Parameter Changed:") + " " + String(p_property), UndoRedo::MERGE_ENDS);
 	undo_redo->add_do_property(tree, p_property, p_value);
@@ -174,10 +174,10 @@ void AnimationNodeBlendTreeEditor::update_graph() {
 				continue;
 			}
 			String base_path = AnimationTreeEditor::get_singleton()->get_base_path() + String(E) + "/" + F.name;
-			EditorProperty *prop = EditorInspector::instantiate_property_editor(AnimationTreeEditor::get_singleton()->get_tree(), F.type, base_path, F.hint, F.hint_string, F.usage);
+			EditorProperty *prop = EditorInspector::instantiate_property_editor(AnimationTreeEditor::get_singleton()->get_animation_tree(), F.type, base_path, F.hint, F.hint_string, F.usage);
 			if (prop) {
 				prop->set_read_only(read_only);
-				prop->set_object_and_property(AnimationTreeEditor::get_singleton()->get_tree(), base_path);
+				prop->set_object_and_property(AnimationTreeEditor::get_singleton()->get_animation_tree(), base_path);
 				prop->update_property();
 				prop->set_name_split_ratio(0);
 				prop->connect("property_changed", callable_mp(this, &AnimationNodeBlendTreeEditor::_property_changed));
@@ -225,7 +225,7 @@ void AnimationNodeBlendTreeEditor::update_graph() {
 
 			ProgressBar *pb = memnew(ProgressBar);
 
-			AnimationTree *player = AnimationTreeEditor::get_singleton()->get_tree();
+			AnimationTree *player = AnimationTreeEditor::get_singleton()->get_animation_tree();
 			if (player->has_node(player->get_animation_player())) {
 				AnimationPlayer *ap = Object::cast_to<AnimationPlayer>(player->get_node(player->get_animation_player()));
 				if (ap) {
@@ -589,14 +589,14 @@ bool AnimationNodeBlendTreeEditor::_update_filters(const Ref<AnimationNode> &ano
 		return false;
 	}
 
-	NodePath player_path = AnimationTreeEditor::get_singleton()->get_tree()->get_animation_player();
+	NodePath player_path = AnimationTreeEditor::get_singleton()->get_animation_tree()->get_animation_player();
 
-	if (!AnimationTreeEditor::get_singleton()->get_tree()->has_node(player_path)) {
+	if (!AnimationTreeEditor::get_singleton()->get_animation_tree()->has_node(player_path)) {
 		EditorNode::get_singleton()->show_warning(TTR("No animation player set, so unable to retrieve track names."));
 		return false;
 	}
 
-	AnimationPlayer *player = Object::cast_to<AnimationPlayer>(AnimationTreeEditor::get_singleton()->get_tree()->get_node(player_path));
+	AnimationPlayer *player = Object::cast_to<AnimationPlayer>(AnimationTreeEditor::get_singleton()->get_animation_tree()->get_node(player_path));
 	if (!player) {
 		EditorNode::get_singleton()->show_warning(TTR("Player path set is invalid, so unable to retrieve track names."));
 		return false;
@@ -829,10 +829,10 @@ void AnimationNodeBlendTreeEditor::_notification(int p_what) {
 		case NOTIFICATION_PROCESS: {
 			String error;
 
-			if (!AnimationTreeEditor::get_singleton()->get_tree()->is_active()) {
+			if (!AnimationTreeEditor::get_singleton()->get_animation_tree()->is_active()) {
 				error = TTR("AnimationTree is inactive.\nActivate to enable playback, check node warnings if activation fails.");
-			} else if (AnimationTreeEditor::get_singleton()->get_tree()->is_state_invalid()) {
-				error = AnimationTreeEditor::get_singleton()->get_tree()->get_invalid_state_reason();
+			} else if (AnimationTreeEditor::get_singleton()->get_animation_tree()->is_state_invalid()) {
+				error = AnimationTreeEditor::get_singleton()->get_animation_tree()->get_invalid_state_reason();
 			}
 
 			if (error != error_label->get_text()) {
@@ -849,13 +849,13 @@ void AnimationNodeBlendTreeEditor::_notification(int p_what) {
 			for (const AnimationNodeBlendTree::NodeConnection &E : conns) {
 				float activity = 0;
 				StringName path = AnimationTreeEditor::get_singleton()->get_base_path() + E.input_node;
-				if (AnimationTreeEditor::get_singleton()->get_tree() && !AnimationTreeEditor::get_singleton()->get_tree()->is_state_invalid()) {
-					activity = AnimationTreeEditor::get_singleton()->get_tree()->get_connection_activity(path, E.input_index);
+				if (AnimationTreeEditor::get_singleton()->get_animation_tree() && !AnimationTreeEditor::get_singleton()->get_animation_tree()->is_state_invalid()) {
+					activity = AnimationTreeEditor::get_singleton()->get_animation_tree()->get_connection_activity(path, E.input_index);
 				}
 				graph->set_connection_activity(E.output_node, 0, E.input_node, E.input_index, activity);
 			}
 
-			AnimationTree *graph_player = AnimationTreeEditor::get_singleton()->get_tree();
+			AnimationTree *graph_player = AnimationTreeEditor::get_singleton()->get_animation_tree();
 			AnimationPlayer *player = nullptr;
 			if (graph_player->has_node(graph_player->get_animation_player())) {
 				player = Object::cast_to<AnimationPlayer>(graph_player->get_node(graph_player->get_animation_player()));
@@ -871,7 +871,7 @@ void AnimationNodeBlendTreeEditor::_notification(int p_what) {
 								E.value->set_max(anim->get_length());
 								//StringName path = AnimationTreeEditor::get_singleton()->get_base_path() + E.input_node;
 								StringName time_path = AnimationTreeEditor::get_singleton()->get_base_path() + String(E.key) + "/time";
-								E.value->set_value(AnimationTreeEditor::get_singleton()->get_tree()->get(time_path));
+								E.value->set_value(AnimationTreeEditor::get_singleton()->get_animation_tree()->get(time_path));
 							}
 						}
 					}
@@ -952,8 +952,8 @@ void AnimationNodeBlendTreeEditor::_node_renamed(const String &p_text, Ref<Anima
 	undo_redo->create_action(TTR("Node Renamed"));
 	undo_redo->add_do_method(blend_tree.ptr(), "rename_node", prev_name, name);
 	undo_redo->add_undo_method(blend_tree.ptr(), "rename_node", name, prev_name);
-	undo_redo->add_do_method(AnimationTreeEditor::get_singleton()->get_tree(), "rename_parameter", base_path + prev_name, base_path + name);
-	undo_redo->add_undo_method(AnimationTreeEditor::get_singleton()->get_tree(), "rename_parameter", base_path + name, base_path + prev_name);
+	undo_redo->add_do_method(AnimationTreeEditor::get_singleton()->get_animation_tree(), "rename_parameter", base_path + prev_name, base_path + name);
+	undo_redo->add_undo_method(AnimationTreeEditor::get_singleton()->get_animation_tree(), "rename_parameter", base_path + name, base_path + prev_name);
 	undo_redo->add_do_method(this, "update_graph");
 	undo_redo->add_undo_method(this, "update_graph");
 	undo_redo->commit_action();
diff --git a/editor/plugins/animation_state_machine_editor.cpp b/editor/plugins/animation_state_machine_editor.cpp
index cc709182a8..060e9d0d10 100644
--- a/editor/plugins/animation_state_machine_editor.cpp
+++ b/editor/plugins/animation_state_machine_editor.cpp
@@ -76,7 +76,7 @@ void AnimationNodeStateMachineEditor::edit(const Ref<AnimationNode> &p_node) {
 }
 
 void AnimationNodeStateMachineEditor::_state_machine_gui_input(const Ref<InputEvent> &p_event) {
-	Ref<AnimationNodeStateMachinePlayback> playback = AnimationTreeEditor::get_singleton()->get_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + "playback");
+	Ref<AnimationNodeStateMachinePlayback> playback = AnimationTreeEditor::get_singleton()->get_animation_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + "playback");
 	if (playback.is_null()) {
 		return;
 	}
@@ -739,7 +739,7 @@ void AnimationNodeStateMachineEditor::_open_menu(const Vector2 &p_position) {
 	ClassDB::get_inheriters_from_class("AnimationRootNode", &classes);
 	menu->add_submenu_item(TTR("Add Animation"), "animations");
 
-	AnimationTree *gp = AnimationTreeEditor::get_singleton()->get_tree();
+	AnimationTree *gp = AnimationTreeEditor::get_singleton()->get_animation_tree();
 	ERR_FAIL_COND(!gp);
 	if (gp && gp->has_node(gp->get_animation_player())) {
 		AnimationPlayer *ap = Object::cast_to<AnimationPlayer>(gp->get_node(gp->get_animation_player()));
@@ -1181,7 +1181,7 @@ void AnimationNodeStateMachineEditor::_clip_dst_line_to_rect(const Vector2 &p_fr
 }
 
 void AnimationNodeStateMachineEditor::_state_machine_draw() {
-	Ref<AnimationNodeStateMachinePlayback> playback = AnimationTreeEditor::get_singleton()->get_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + "playback");
+	Ref<AnimationNodeStateMachinePlayback> playback = AnimationTreeEditor::get_singleton()->get_animation_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + "playback");
 
 	Ref<StyleBoxFlat> style = get_theme_stylebox(SNAME("state_machine_frame"), SNAME("GraphNode"));
 	Ref<StyleBoxFlat> style_selected = get_theme_stylebox(SNAME("state_machine_selected_frame"), SNAME("GraphNode"));
@@ -1369,7 +1369,7 @@ void AnimationNodeStateMachineEditor::_state_machine_draw() {
 		}
 
 		StringName fullpath = AnimationTreeEditor::get_singleton()->get_base_path() + String(tl.advance_condition_name);
-		if (tl.advance_condition_name != StringName() && bool(AnimationTreeEditor::get_singleton()->get_tree()->get(fullpath))) {
+		if (tl.advance_condition_name != StringName() && bool(AnimationTreeEditor::get_singleton()->get_animation_tree()->get(fullpath))) {
 			tl.advance_condition_state = true;
 			tl.auto_advance = true;
 		}
@@ -1484,7 +1484,7 @@ void AnimationNodeStateMachineEditor::_state_machine_draw() {
 }
 
 void AnimationNodeStateMachineEditor::_state_machine_pos_draw() {
-	Ref<AnimationNodeStateMachinePlayback> playback = AnimationTreeEditor::get_singleton()->get_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + "playback");
+	Ref<AnimationNodeStateMachinePlayback> playback = AnimationTreeEditor::get_singleton()->get_animation_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + "playback");
 
 	if (!playback.is_valid() || !playback->is_playing()) {
 		return;
@@ -1578,15 +1578,15 @@ void AnimationNodeStateMachineEditor::_notification(int p_what) {
 		case NOTIFICATION_PROCESS: {
 			String error;
 
-			Ref<AnimationNodeStateMachinePlayback> playback = AnimationTreeEditor::get_singleton()->get_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + "playback");
+			Ref<AnimationNodeStateMachinePlayback> playback = AnimationTreeEditor::get_singleton()->get_animation_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + "playback");
 
 			if (error_time > 0) {
 				error = error_text;
 				error_time -= get_process_delta_time();
-			} else if (!AnimationTreeEditor::get_singleton()->get_tree()->is_active()) {
+			} else if (!AnimationTreeEditor::get_singleton()->get_animation_tree()->is_active()) {
 				error = TTR("AnimationTree is inactive.\nActivate to enable playback, check node warnings if activation fails.");
-			} else if (AnimationTreeEditor::get_singleton()->get_tree()->is_state_invalid()) {
-				error = AnimationTreeEditor::get_singleton()->get_tree()->get_invalid_state_reason();
+			} else if (AnimationTreeEditor::get_singleton()->get_animation_tree()->is_state_invalid()) {
+				error = AnimationTreeEditor::get_singleton()->get_animation_tree()->get_invalid_state_reason();
 				/*} else if (state_machine->get_parent().is_valid() && state_machine->get_parent()->is_class("AnimationNodeStateMachine")) {
 				if (state_machine->get_start_node() == StringName() || state_machine->get_end_node() == StringName()) {
 					error = TTR("Start and end nodes are needed for a sub-transition.");
@@ -1638,7 +1638,7 @@ void AnimationNodeStateMachineEditor::_notification(int p_what) {
 					break;
 				}
 
-				bool acstate = transition_lines[i].advance_condition_name != StringName() && bool(AnimationTreeEditor::get_singleton()->get_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + String(transition_lines[i].advance_condition_name)));
+				bool acstate = transition_lines[i].advance_condition_name != StringName() && bool(AnimationTreeEditor::get_singleton()->get_animation_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + String(transition_lines[i].advance_condition_name)));
 
 				if (transition_lines[i].advance_condition_state != acstate) {
 					state_machine_draw->queue_redraw();
@@ -1693,7 +1693,7 @@ void AnimationNodeStateMachineEditor::_notification(int p_what) {
 					Ref<AnimationNodeStateMachinePlayback> current_node_playback;
 
 					while (anodesm.is_valid()) {
-						current_node_playback = AnimationTreeEditor::get_singleton()->get_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + next + "/playback");
+						current_node_playback = AnimationTreeEditor::get_singleton()->get_animation_tree()->get(AnimationTreeEditor::get_singleton()->get_base_path() + next + "/playback");
 						next += "/" + current_node_playback->get_current_node();
 						anodesm = anodesm->get_node(current_node_playback->get_current_node());
 					}
diff --git a/editor/plugins/animation_tree_editor_plugin.cpp b/editor/plugins/animation_tree_editor_plugin.cpp
index 1de4fbaabc..61aa861a3f 100644
--- a/editor/plugins/animation_tree_editor_plugin.cpp
+++ b/editor/plugins/animation_tree_editor_plugin.cpp
@@ -74,6 +74,12 @@ void AnimationTreeEditor::edit(AnimationTree *p_tree) {
 	edit_path(path);
 }
 
+void AnimationTreeEditor::_node_removed(Node *p_node) {
+	if (p_node == tree) {
+		tree = nullptr;
+	}
+}
+
 void AnimationTreeEditor::_path_button_pressed(int p_path) {
 	edited_path.clear();
 	for (int i = 0; i <= p_path; i++) {
@@ -167,6 +173,9 @@ void AnimationTreeEditor::enter_editor(const String &p_path) {
 
 void AnimationTreeEditor::_notification(int p_what) {
 	switch (p_what) {
+		case NOTIFICATION_ENTER_TREE: {
+			get_tree()->connect("node_removed", callable_mp(this, &AnimationTreeEditor::_node_removed));
+		} break;
 		case NOTIFICATION_PROCESS: {
 			ObjectID root;
 			if (tree && tree->get_tree_root().is_valid()) {
@@ -181,6 +190,9 @@ void AnimationTreeEditor::_notification(int p_what) {
 				edit_path(edited_path);
 			}
 		} break;
+		case NOTIFICATION_EXIT_TREE: {
+			get_tree()->disconnect("node_removed", callable_mp(this, &AnimationTreeEditor::_node_removed));
+		} break;
 	}
 }
 
diff --git a/editor/plugins/animation_tree_editor_plugin.h b/editor/plugins/animation_tree_editor_plugin.h
index 658fd287b6..e1d9536f03 100644
--- a/editor/plugins/animation_tree_editor_plugin.h
+++ b/editor/plugins/animation_tree_editor_plugin.h
@@ -69,12 +69,13 @@ class AnimationTreeEditor : public VBoxContainer {
 
 protected:
 	void _notification(int p_what);
+	void _node_removed(Node *p_node);
 	static void _bind_methods();
 
 	static AnimationTreeEditor *singleton;
 
 public:
-	AnimationTree *get_tree() { return tree; }
+	AnimationTree *get_animation_tree() { return tree; }
 	void add_plugin(AnimationTreeNodeEditorPlugin *p_editor);
 	void remove_plugin(AnimationTreeNodeEditorPlugin *p_editor);