Hi all,
I'm trying to figure out how to implement something like the VRML
VisibilitySensor node.
This would be a WakeupCriterion which triggers when an object swings
into/out of view i.e. when the scheduling region of the object is visible
whilst the activation volume of the ViewPlatform intersects with the
scheduling region of the object. The WakeupOnActivation class is no good,
because it triggers on proximity to the ViewPlatform, even if the object of
interest is 180 degrees behind the ViewPlatform.
Have I missed something (v. likely)? If not, why did Sun not include this
with the other WakeupCriterions?
Is it possible to hack this together by moving a (roughly) frustum-shaped
object with the ViewPlatform and pick up the CollisionEntry/CollisionExit
events (yuk!)?
Mike Wiese
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