Using visAd without Java 3D or native libraries.

We've just downloaded visAd and are very interested in using it
as the basis for our Java image tools.  However I'm a bit confused
by the requirements for it to run.  The documentation at
   http://www.ssec.wisc.edu/~billh/visad.html
seems to imply that one can use either Java2D or Java3D for the display
but building the system seems to require Java3D, which is not
yet released for the architecture we'd prefer to develop under
(Dec/Compaq Tru-Unix).  Can one build visAd without the Java3D components?
In fact we've downloaded the Java elements of Java3D so we can compile
all the Java components.  However the examples we've tested seem
to fail immediately -- indicating that they are unable to link
in the native J3D libraries.  If we could avoid referencing
the J3D stuff could we use visAd and if so how?

        Regards,
        Tom McGlynn