22 Sept 1998

This is a translation of the Device code to Java3D.

The Function3f interface became Curve3f because of the need of Point3f
instead of Vector3f used in constructiong the Shape3Ds.

ParametricCurve became ParametricCurve3D and it now extends Shape3D.

The Device class the main driver before is replaced with Universe
a different driver.

---- Some improvements

The files UniverseK, UniverseM and UniverseA all build upon Universe
and allow for user input. Each make it possible for the user to
interactively select which Parametric curve to view. The Helix, the
Torus (Knot) or both (the default).

UniverseK uses the keyboard. '1', '2' and 'B' select the various modes.

UniverseM uses swing Menu's. (The shortcuts are 'H', 'T' and 'B'). There
is a bug which prevents this from working correctly on Solaris apparently.
It might work on win32 after you uncomment the line:
        //JPopupMenu.setDefaultLightWeightPopupEnabled(false);

UniverseA use the awt Menus. These are heavyweight objects.