GraphicsBase.T is an abstraction of a window system (e.g.\ X, Trestle,
or NT) and a 3D graphics library (e.g.\ PEX or OpenGL).
I have not yet isolated the window- and graphics-system dependent code; this is on my to-do list. Consequently, this interface still needs to be fleshed out.
GraphicsBase; IMPORT ProxiedObj; TYPE T <: ProxiedObj.T; EXCEPTION Failure; END GraphicsBase.