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

Tue Sep 26 17:23:07 PDT 2023

John, I can't tell the problem without an example that shows what is failing. 
Please show some code you are trying to run. 
If the tool is failing when a Joint has children, except for the first Joint, which has containerfield skeleton, then yes, tht is a problem. Idon't see that in hanim xml code that I have run. 

6.2.84 HAnimJoint from the link below shows Joint containerfield children, which is actually a slight simplification since for xml or any other lang tthe first joint of skeleton must have containerfield skeleton declared somewhere in the code.  

Please show some code for these problems. The problem must be shown by good code that fails or bad code that runs. 

Joe

-----Original Message-----
From: Michalis Kamburelis <michalis.kambi at gmail.com>
Sent: Sep 26, 2023 7:17 AM
To: Joe D Williams <joedwil at earthlink.net>
Cc: John Carlson <yottzumm at gmail.com>, Brutzman Donald (Don) (CIV) <brutzman at nps.edu>, Peitso Loren (CIV) <lepeitso at nps.edu>, X3D Graphics public mailing list <x3d-public at web3d.org>
Subject: Re: [x3d-public] Discussion: containerField for x3d.py XML export

I see John submitted a ticket,
https://github.com/castle-engine/view3dscene/issues/69 . As I
mentioned there, please attach or link there a testcase.

CGE/view3dscene follow the containerField specified in X3D XML
specification, https://www.web3d.org/documents/specifications/19776-1/V3.3/Part01/EncodingOfNodes.html#HAnimJoint
. Maybe the testcase just misses containerField="xxx" usage at
respective "" elements.

Regards,
Michalis

wt., 26 wrz 2023 o 08:01 Joe D Williams napisał(a):
>
> > The problem is with X3DJSONLD and view3dscene assuming that children is a field of HAnimHumanoid.
>
>
>
> HAnimHumanoid includes fields.
>
> The skeleton field defines a hierarchy of Joint nodes.
>
> The first joint of the hierarchy, root, names the container field, skeleton, for the hierarchy, and is the ancestor of all other children nodes in the hierarchy.
>
> x3dv
>
> skeleton
>
> Joint
>
> children
>
> Joint ...
>
> skeleton is the container for the joint hierarchy.
>
>
>
> x3d
>
> Joint containerfield skeleton
>
> Joint containerfield children
>
> ...
>
> skeleton is the containerfield for the joint hierarchy
>
>
>
> Just a guess at what you are concerned about.
>
> What is not happening? If in doubt, check the schema.
>
> Joe
>
>
>
> -----Original Message-----
> From: John Carlson
> Sent: Sep 25, 2023 10:36 PM
> To: Brutzman, Donald (Don) (CIV)
> Cc: Peitso, Loren (CIV) , X3D Graphics public mailing list
> Subject: Re: [x3d-public] Discussion: containerField for x3d.py XML export
>
>
>
> The problem is with X3DJSONLD and view3dscene assuming that children is a field of HAnimHumanoid.
>
> That's not right!
>
> John
>
> On Sun, Sep 24, 2023 at 2:47 PM Brutzman, Donald (Don) (CIV) 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
>> Sent: Sunday, September 24, 2023 11:34 AM
>> To: Brutzman, Donald (Don) (CIV) ; Michalis Kamburelis ; Peitso, Loren (CIV) ; X3D Graphics public mailing list
>> 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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