[x3d-public] Sharing X3D fields in gatherings

[John Carlson]

I’m trying to figure out how to share fields within “gatherings,” when
something like DIS is unavailable, as it is with X_ITE.  I currently use
ProtoInstances and specify a list of gathering names in an MFString.  That
works, but it involves a goldberg contraption.  I would like something
easy, like an extension to <field> which includes gathering names.  In a
single user app, this would not be needed. But I feel something like this
is needed for multiuser X3D.  Gathering names would point to security
tokens on the client side to enroll users in gatherings on the server
side.  At this point, I am not trying to defeat CORS.  A templating service
with client provided data currently fills in a textarea with gathering
information.  Ideally, filling in the textarea will be done on the client
side with Selenium Java, and allow multiple gatherings.

Note that mapping from gathering name to gathering token makes the scene
available to many collaboration servers , and keeps the .x3d scene clear of
tokens

Your thoughts?  Can we subclass <field> perhaps?

John
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