p.s., Re: Demo for screen locked renderer.

[Bill Hibbard <billh@ssec.wisc.edu>]

After a short talk with Tom Rink, a slight amendment
to the injunction against using ScalarMaps to spatial
DisplayRealType. For example, if you want a screen
locked depiction of a Field for a color table wedge,
you could give it unique RealTypes mapped to XAxis,
YAxis and ZAxis and with explicit setRange() calls so
they would never be auto-scaled. The important thing
is that screen-locked Data avoid involvement with
spatial ScalarMaps whose setRange() may change.