Describes a node in a hierarchical tree of 3D meshes. Each node can contain
geometry in the form of one or more ILcd3DMesh objects, Each node can
furthermore have a transformation matrix that applies to itself and its
children. This interface can be used to model scene graph style data formats
such as Collada or OpenFlight.
Returns the geometry contained in this node, in the form of 3D meshes,
or an empty list if this node does not contain any data.
a list of 3D meshes, possibly empty but never null
Returns a transformation matrix that applies to this node and its
children. The matrix should be 4x4 elements in column-major order. This
is the same convention used by OpenGL functions such as
glLoadMatrix(). null can be returned and represents the
a 4x4 column-major transformation matrix, possibly null