[x3d-public] Request for X3D encoding comment output from X3DPSAIL

[John Carlson]

Don, thanks for your comment on this ticket that naively adding Comment to
a children field might not work.  That was one of my intentions on
expressing myself so vocally.  I apologize for using your time to do this,
but I think it revealed a possible design consideration.  I think if I had
discovered it, it would have gone over like a wet balloon.

Thank you again, I will not put comments arbitrarily in the scenegraph for
now with my PythonSerializer.js, until you indicate it’s ready!   I will
leave them out of the scenegraph, as they are now.   Since I handle
comments generically, I will have to research the nodes you’ve accomplished.

Now, can we have other multi-line comments, not in the persistent
scenegraph, in Python translated from .x3d, in the short term, like:

#
# This is comment line 2
# This is comment line 3
#

?

John

>From the ticket:

“

This is not an easy fix for converting files because Comment is not part of
the content model for all nodes. Solving this will probably require
extending class _ X3DNode in x3d.py and sorting out possible subclass
collisions. It will also be difficult to retain the original order of child
nodes and child comments within a parent node.

This might be fixable someday - after some effort I got it working for
head, Scene, field, fieldValue.. Deferred as future work.
 ”

On Mon, Dec 29, 2025 at 12:52 PM Don Brutzman <don.brutzman at gmail.com>
wrote:

>
> I have posted a new ticket to capture this point.  Perhaps a useful
> exemplar, as well.
>
>    - X3D SourceForge ticket #82 creating persistent comments in python
>    when converting from XML
>    - https://sourceforge.net/p/x3d/tickets/82/
>
> Hope this helps.  Again thanks for your many efforts.  Have fun improving
> X3D!  🤔 👍
>
>>
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