Functions to query material information of wings/fuselages. Materials are currently ony implemented for the wing component segment. Here, materials for the lower and upper wing surface can be queried, which can be a material for the whole skin/surface or a material defined inside a wing cell. A wing cell material overwrites the global skin material, i.e. if the whole wing skin material is aluminum and the trailing edge is made of radar absorbing material, only the absorbing material is returned by the querying functions.