[X3D-Public] Question about InstantReality and X3DOM OrthoViewpoint.zNear/zFar

Michalis Kamburelis michalis.kambi at gmail.com
Mon Nov 24 15:38:22 PST 2014

To whom it may interest, John Carlson found a link explaining how X3DOM
and InstantReality handle avatarSize or visibilityLimit vs zNear/zFar.
Link and my summary below :)


Michalis Kamburelis wrote:
> John Carlson wrote:
>> This seems relevant:
>> http://sourceforge.net/p/x3dom/mailman/message/32959496/
> Ha, great, thanks for finding this! Reasing this, and linked
> https://github.com/x3dom/x3dom/issues/439 (stil open) does answer my
> questions.
> So:
> - X3DOM simply does not support avatarSize or visibilityLimit. Their
> [Ortho]Viewpoint.zNear/zFar values are always used. That is why their
> [Ortho]Viewpoint.zNear/zFar default values are not -1.
> - For InstantPlayer, [Ortho]Viewpoint.zNear/zFar are only used when they
> are not default. And that is why the default values are -1, to make them
> special. When they are -1 (default) then avatarSize and visibilityLimit
> are used.
> This actually explains everything, I think. Unfortunately, this also
> means that X3DOM is not compatible with InstantPlayer (or other X3D
> browsers, for that matter).
> P.S. I see you replied to me, not adding Cc to the x3d-public mailing
> list. Is it Ok with you if I forward this to the x3d-public list? This
> information may be useful for others :)
> Regards,
> Michalis

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