[x3d-public] [x3dom-users] bboxDisplay considerations; metadata nodes for new field extensions

[Brutzman, Donald (Don) (CIV)]

Thanks for continuing news about this excellent progress.

Am thinking we might all agree to regularize addition of nonstandard fields in a way that still passes content validation.

For example, non-standard experimental example

<Shape bboxDisplay='true' bboxColor='0.7 0.8 0.9' bboxMargin='0.1' >
   <Sphere/>
</Shape>

Might be equivalently and validly expressed as

<Shape bboxDisplay='true'>
   <MetadataSet name='extension'>
	<MetadataString name='bboxColor' value='0.7 0.8 0.9'/>
	<MetadataString name='bboxMargin' value='0.1' />
   </MetadataSet>
   <Sphere/>
</Shape>

A little more verbose perhaps... However, note that not only is model content validatable, but metadata content might also be validated if we build a metadata vocabulary that lists experimental field names, types and default values.  That way common extensions might be more sharable and model content remains confirmably correct.

Seems like a useful good practice that isn't complex, so we could easily build <MetadataSet name='extension'> capabilities into our browser parsers and authoring tools.

The X in X3D is Extensible... looking forward to continued innovation and practice/progress together.

v/r Don


-----Original Message-----
From: Andreas Plesch <andreasplesch at gmail.com> 
Sent: Saturday, April 1, 2023 6:43 AM
To: X3D <x3d-public at web3d.org>
Cc: x3dom mlist <x3dom-users at lists.sourceforge.net>
Subject: Re: [x3dom-users] [x3d-public] bboxDisplay considerations

The bboxDisplay field is now available for bounded objects (grouping nodes and shapes) in the dev. version of x3dom.

The color of the displayed bounding box can be customized with the non-standard bboxColor field, and the size expanded with the bboxMargin field.

Enjoy ! Andreas

On Thu, Mar 30, 2023 at 2:19 PM Andreas Plesch <andreasplesch at gmail.com> wrote:
>
> I think it will be very useful to allow different colors for different 
> sets of bounding boxes. Here are the rotating cubes with two sets of 
> bounding boxes. The yellow ones react to a TouchSensor, the orange 
> ones do not:
> [...]
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