Zak,

Think of the view graph this way.  There is a view platform.  On that
platform is the viewer.  For most systems the viewer cannot move around
relative to the platform and thus is always looking straight ahead.
 Some systems have motion / head trackers and with these systems the
viewer can look in directions that are not straight ahead relative to
the platform.  Expect for those cases, anything placed in the -z
direction (far enough to be in front of the near clip pane, ie. your
monitor screen that is a window into the Java3D world) should appear to
be "in front" of the viewer.

An example.  Create a BranchGroup and attach the ViewPlatform to it.
 Also create a TransformGroup and hang it under the BranchGroup, then
hang your view geometry under the TransformGroup.  Even though the
entire BranchGroup may move around in the virtual world, this small
portion of the larger view graph will remain in a fixed reference frame
with respect to each other.  That means that the position of your view
geometry will not move relative to your viewer.

Good luck,
Todd



Zak Nixon wrote:

>Does anyone have an example of platform geometry?
>Is the geometry placed in front of the viewer automatically?
>
>-zak
>
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