[x3d-public] Discussion: containerField for x3d.py XML export

[John Carlson]

What I’m trying to say is, I want to dump a variable to its appropriate
constructor (not __init__, but app code) with parameters, including
children, if x3d children.

On Sun, Sep 24, 2023 at 5:42 PM John Carlson <yottzumm at gmail.com> wrote:

> My approach for python.dumps() (dump internal python to python source code
> as a string) would be to attempt to do it for generic python, and if that
> fails, write a python library for x3d only.
>
> I don’t know  if this exists.  I’ll ask a friend.
>
> John
>
> On Sun, Sep 24, 2023 at 5:18 PM John Carlson <yottzumm at gmail.com> wrote:
>
>> I don’t actually have a python example, since I’m constructing the python
>> scenegraph in the Blender x3dv export addon that Doug and I are
>> constructing.  If one wants to add python output encoding to x3d.py or
>> adjunct code, that would be super cool and helpful.
>>
>> Asking me to convert .x3d to Python is kind of hiding problems.
>>
>> An x3d Python source code export from Blender would be a good marketing
>> tool for x3d.py.
>>
>> I will ask Katy and Joe if they want to release .fbx and .blend, but the
>> Blender export addon needs a bit more work, so I’m providing to people
>> interested in helping debug it.
>>
>> We need more people to work on building x3d import plugins for HAnim.  I
>> can work on imports (this is actually harder than export), if someone takes
>> over Blender export with x3d.py.
>>
>> John
>> On Sun, Sep 24, 2023 at 2:47 PM Brutzman, Donald (Don) (CIV) <
>> brutzman at nps.edu> wrote:
>>
>>> Thanks for continued troubleshooting.
>>>
>>>
>>>
>>> Please do not do anything with containerField handling in x3d.py since
>>> it is unique to XML encoding.
>>>
>>>
>>>
>>> If you encounter any incorrect handling, please provide a regular issue
>>> report that notes
>>>
>>>    - Model, in .x3d/.x3dv and also .py
>>>    - Error or warning that was encountered, relevant tools, etc.
>>>
>>>
>>>
>>> I can then isolate the problem and fix it.  When errors do occur, it is
>>> usually an error in the scene, but sometimes a simple omission of some sort
>>> somewhere deep in the code autogeneration of the library.
>>>
>>>
>>>
>>> p.s. also thanks for your recent issue reports on X3DJSAIL, very
>>> helpful.  I have made a number of improvements this weekend, hoping to
>>> publish tonight.
>>>
>>>
>>>
>>> all the best, Don
>>>
>>> --
>>>
>>> Don Brutzman  Naval Postgraduate School, Code USW/Br
>>> brutzman at nps.edu
>>>
>>> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA
>>> +1.831.656.2149
>>>
>>> X3D graphics, virtual worlds, navy robotics
>>> https://faculty.nps.edu/brutzman
>>>
>>>
>>>
>>> *From:* John Carlson <yottzumm at gmail.com>
>>> *Sent:* Sunday, September 24, 2023 11:34 AM
>>> *To:* Brutzman, Donald (Don) (CIV) <brutzman at nps.edu>; Michalis
>>> Kamburelis <michalis.kambi at gmail.com>; Peitso, Loren (CIV) <
>>> lepeitso at nps.edu>; X3D Graphics public mailing list <
>>> x3d-public at web3d.org>
>>> *Subject:* Discussion: containerField for x3d.py XML export
>>>
>>>
>>>
>>> First of all, great work on x3d.py, Loren and Don, I feel like I am
>>> polishing a diamond.
>>>
>>>
>>>
>>> I am considering adding the containerField attribute (not field) to XML
>>> output in x3d.py. This is mainly to support requirements of view3dscene.
>>> It complains if I don’t add the containerField attributes in HAnim
>>> (skeleton and joints containerFields, maybe more)—the default, children, is
>>> not an acceptable to view3dscene.  Also, not having a skin containerField
>>> is weird when dropping arbitrary Shape nodes into a HAnimHumanoid.
>>>
>>>
>>>
>>> Does adding the containerField attribute seem like a good idea, or
>>> should I push back on browser vendors?
>>>
>>>
>>>
>>> I plan to do something like I do for VRML when printing out joints and
>>> skeleton fields etc.  I won’t print out the containerField for obvious
>>> fields, i have a list of these somewhere…geometry, appearance, material,
>>> etc
>>>
>>>
>>>
>>> Should I allow the x3d.py app programmer to add a containerField
>>> attribute, or should I compute it as best i can, and save browser vendors
>>> the pain?
>>>
>>>
>>>
>>> I think what this means is passing an optional parameter to some
>>> each.XML() method calls.
>>>
>>>
>>>
>>> After writing this message, the answer seems obvious.
>>>
>>>
>>>
>>> Comments?
>>>
>>>
>>>
>>> John
>>>
>>
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