+ case ValueBase::TYPE_VECTOR:
+ if (ValueNode_BLineCalcTangent::Handle bline_tangent = ValueNode_BLineCalcTangent::Handle::cast_dynamic(value_desc.get_value_node()))
+ {
+ Angle old_angle = (*bline_tangent)(get_time()).get(Vector()).angle();
+ Angle new_angle = value.angle();
+ int offset_index = bline_tangent->get_link_index_from_name("offset");
+ Angle old_offset((*(bline_tangent->get_link(offset_index)))(get_time()).get(Angle()));
+ return canvas_interface()->change_value(synfigapp::ValueDesc(bline_tangent,offset_index), old_offset + new_angle - old_angle);
+ }
+
+ if (ValueNode_BLineCalcVertex::Handle bline_vertex = ValueNode_BLineCalcVertex::Handle::cast_dynamic(value_desc.get_value_node()))
+ {
+ ValueNode_BLine::Handle bline = ValueNode_BLine::Handle::cast_dynamic(bline_vertex->get_link(bline_vertex->get_link_index_from_name("bline")));
+ Real radius = 0.0;
+ Real amount = synfig::find_closest_point((*bline)(get_time()), value, radius, bline->get_loop());
+ return canvas_interface()->change_value(synfigapp::ValueDesc(bline_vertex,bline_vertex->get_link_index_from_name("amount")), amount);
+ }
+ default: // fall through
+