change: remove UB in core.h

app/widget/nodeview/nodeview.cpp

@@ -1120,7 +1120,8 @@ void NodeView::open_selected_node_in_viewer()
 	// Find first viewer in list of selected nodes and open it
 	foreach (Node *n, selected_nodes_) {
 		if (ViewerOutput *viewer = dynamic_cast<ViewerOutput *>(n)) {
-			Core::instance()->open_node_in_viewer(viewer);
+			Core::instance()->open_node_in_viewer(
+				reinterpret_cast<OakEngineNode *>(viewer));
 			break;
 		}
 	}
@@ -1734,7 +1735,9 @@ void NodeView::group_nodes()
 	oakengine_undo_command_multi_add_child(command, oakengine_node_set_position_command(reinterpret_cast<void *>(group), reinterpret_cast<void *>(context), avg_pos.x(), avg_pos.y(), 0));
 
 	// Do command
-	Core::instance()->label_nodes({ group }, command);
+	Core::instance()->label_nodes(
+		QVector<OakEngineNode *>{ reinterpret_cast<OakEngineNode *>(group) },
+		command);
 
 	oakengine_undo_push(command, tr("Grouped Nodes").toUtf8().constData());
 }
@@ -1877,7 +1880,8 @@ void NodeView::show_selected_node_in_param_editor()
 
 void NodeView::label_selected_nodes()
 {
-	Core::instance()->label_nodes(selected_nodes_);
+	Core::instance()->label_nodes(
+		reinterpret_cast<const QVector<OakEngineNode *> &>(selected_nodes_));
 }
 
 void NodeView::item_about_to_be_deleted(NodeViewItem *item)

app/widget/projectexplorer/projectexplorer.cpp

@@ -537,7 +537,8 @@ void ProjectExplorer::show_item_properties_dialog()
 		fpd.exec();
 
 	} else if (dynamic_cast<Folder *>(sel)) {
-		Core::instance()->label_nodes(context_menu_items_);
+		Core::instance()->label_nodes(
+			reinterpret_cast<const QVector<OakEngineNode *> &>(context_menu_items_));
 
 	} else if (dynamic_cast<Sequence *>(sel)) {
 		SequenceDialog sd(static_cast<Sequence *>(sel),

app/widget/projectexplorer/projectviewmodel.cpp

@@ -463,7 +463,7 @@ bool ProjectViewModel::dropMimeData(const QMimeData *data,
 		}
 
 		// Trigger an import
-		Core::instance()->import_files(urls, static_cast<Folder *>(drop_item));
+		Core::instance()->import_files(urls, reinterpret_cast<OakEngineNode *>(drop_item));
 
 		return true;
 	}

app/widget/timelinewidget/timelinewidget.cpp

@@ -1737,8 +1737,10 @@ void TimelineWidget::nest_selected_clips()
 
 	// Create new sequence
 	Project *project = this->get_connected_node()->project();
-	Sequence *nest =
-		Core::instance()->create_new_sequence_for_project(tr("Nested Sequence %1"), project);
+	Sequence *nest = reinterpret_cast<Sequence *>(
+		Core::instance()->create_new_sequence_for_project(
+			tr("Nested Sequence %1"),
+			reinterpret_cast<OakEngineProject *>(project)));
 	{
 		oak_video_params vpod;
 		oakengine_viewer_get_video_params(

app/widget/timelinewidget/tool/import.cpp

@@ -409,12 +409,12 @@ void ImportTool::drop_ghosts(bool insert, void *parent_command)
 		}
 
 		if (behavior != k_dws_disable) {
-			Project *active_project = Core::instance()->get_active_project();
+			OakEngineProject *active_project = Core::instance()->get_active_project();
 
 			if (active_project) {
-				Sequence *new_sequence =
+				Sequence *new_sequence = reinterpret_cast<Sequence *>(
 					Core::instance()->create_new_sequence_for_project(
-						active_project);
+						active_project));
 
 				oakengine_viewer_set_default_parameters(
 			reinterpret_cast<OakEngineNode *>(new_sequence));
@@ -453,7 +453,7 @@ void ImportTool::drop_ghosts(bool insert, void *parent_command)
 				}
 
 				if (sequence_is_valid) {
-					dst_graph = Core::instance()->get_active_project();
+					dst_graph = reinterpret_cast<Project *>(Core::instance()->get_active_project());
 
 					oakengine_undo_command_multi_add_child(command,
 		oakengine_node_add_to_project_command(

app/widget/viewer/viewer.cpp

@@ -854,7 +854,8 @@ void ViewerWidget::request_next_dry_run()
 
 void ViewerWidget::save_frame_as_image()
 {
-	Core::instance()->open_export_dialog_for_viewer(get_connected_node(), true);
+	Core::instance()->open_export_dialog_for_viewer(
+		reinterpret_cast<OakEngineNode *>(get_connected_node()), true);
 }
 
 void ViewerWidget::detect_multicam_node_now()