take height into axis_to_world of helixline

frontend/src/io_axis.cpp

@@ -80,6 +80,7 @@ auto construct_helixline_extrude_axis(const helixline_axis_descriptor_t& desc)
     rot *= Eigen::Quaterniond::FromTwoVectors(rot * Eigen::Vector3d(1, 0, 0), convert_vec3d(desc.start_direction));
     if (!desc.is_righthanded) axis_to_world.matrix().col(1).y() = -1;
     axis_to_world               = rot * axis_to_world;
+    axis_to_world.matrix().col(2) *= height;
     axis_to_world.translation() = origin;
 
     return std::make_tuple(obj, false, axis_to_world);