[x3d-public] HAnim only skeleton renderable ?

[Andreas Plesch]

Hi Joe,

ok. Most of the HAnim scenes in the web3d examples archive probably
populate these fields with USE references. My vague sense is that they do
that only out of a perception that this is required or recommended, not for
a functional purpose, but I did not go through those in detail.

I will see if and how it is possible to special case the nodes in these
fields in x3dom, perhaps by removing them from the list of drawable objects.

On a spec. tangent,  19774-2/V2.0 Annex B, here

http://www.web3d.org/documents/specifications/19774-2/V2.0/MotionDataAnimation/ExampleKeyframeAnimation.html

and  19774-1/V2.0 Annex F

http://www.web3d.org/documents/specifications/19774-1/V2.0/HAnim/Design.html

define a containerField='skeleton' for the example Humanoid whose parent is
the Scene. This is probably an editing oversight.

-Andreas


On Tue, Jun 19, 2018 at 6:52 PM Joseph D Williams <joedwil at earthlink.net>
wrote:

>
>    - So my question is if only the nodes in the skeleton field should be
>
> rendered while the USE references in the joints and segments fields
>
> should not be rendered and are provided exclusively for other purposes
>
> (like kinematics) ? I could not quite answer that question from the
>
> standard language.
>
>
>
> Forget these fields they are leftovers from when the skeleton was not
> included in the user code and the fields just defined which of the skeleton
> parts in the ‘standard’ model that was not even accessible to the actual
> user, these fields were all he got to author, and some animation.
>
> Anyway, unless somebody can clearly show the need for these, then should
> be dumped, and never treated as required. When it became feasible to permit
> the skeleton into the actual user code, these fields became excess but for
> some reason nobody will delete them.
>
>
>
> Thanks again,
>
> Joe
>
>
>
>
>
> *From: *Andreas Plesch <andreasplesch at gmail.com>
> *Sent: *Tuesday, June 19, 2018 5:35 AM
> *To: *X3D Graphics public mailing list <x3d-public at web3d.org>
> *Subject: *[x3d-public] HAnim only skeleton renderable ?
>
>
>
> In my first attempt to improve the implemention of  HAnim nodes and
>
> fields in x3dom, most (all?) shapes making up the Nancy humanoid from
>
> Nancy, native tags, were rendered multiple times, on top of each
>
> other.
>
> The reason turned out to be the USE references in the joints and
>
> segments field of Humanoid.
>
> Since a USE node places another instance of a DEF node into the scene
>
> graph, all the Shapes in the joint and segment nodes were duplicated.
>
>
>
> So my question is if only the nodes in the skeleton field should be
>
> rendered while the USE references in the joints and segments fields
>
> should not be rendered and are provided exclusively for other purposes
>
> (like kinematics) ? I could not quite answer that question from the
>
> standard language.
>
>
>
> -Andreas
>
>
>
> --
>
> Andreas Plesch
>
> Waltham, MA 02453
>
>
>
> _______________________________________________
>
> x3d-public mailing list
>
> x3d-public at web3d.org
>
> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>
>
>


-- 
Andreas Plesch
Waltham, MA 02453
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20180620/926ac9dd/attachment.html>