||Interface for tuples consisting of float values
||An interface for classes providing parts of the material data that is
contained in an MTL file.
||An interface for classes that may read MTL data, and store the
read materials as Mtl objects in a list.
||Interface for classes providing part of the data that may be stored in
an OBJ file.
||Interface for classes providing the information of a single face
that is stored in an OBJ file.
||Interface describing a single group of an OBJ file.
||Interface for all classes that may read OBJ data from a stream and
store the read data in an ObjTarget.
||Interface for all classes that may receive the data that is read
from an OBJ file.
||Interface for all classes that may write an Obj file to a stream.