another wind barb question

Thanks for pointing me towards the main methods in

BarbManipulationRendererJ2D
BarbManipulationRendererJ3D
BarbRendererJ2D
BarbRendererJ3D

Indeed, there are main methods that display wind barbs.

My next question/comment:

What I would ideally like to find is a method that returns a
VisADGeometryArray of a wind barb. This array would then easily allow the
creation of a shape object for display. 

Does anyone know of such a method?

Thanks again for your time.
--
Julien