__init__ (
        self,
        name,
        matrix,
        xyz_origin,
        xyz_step,
        level,
        rgba,
        show_mesh,
        mesh_lighting,
        two_sided_lighting,
        flip_normals,
        )

bounding_box ( self )

erase_surface ( self )

set_color ( self,  rgba )

set_display_style (
        self,
        show_mesh,
        mesh_lighting,
        two_sided_lighting,
        flip_normals,
        only_if_changed=1,
        )

show (
        self,
        model,
        message_cb,
        )