+ // these 3 are all the same at the moment, but let's play it safe, just in case it changes
+ int tangent_amount_index(bline_tangent_1->get_link_index_from_name("amount"));
+ int vertex_amount_index(bline_vertex->get_link_index_from_name("amount"));
+ int width_amount_index(bline_width->get_link_index_from_name("amount"));
+
+ ValueNode::Handle amount_value_node(bline_vertex->get_link(vertex_amount_index));
+