[X3D-Ecosystem] Loading into X3DPSAIL (for Maya and Blender)
John Carlson
yottzumm at gmail.com
Tue Jan 27 09:16:28 PST 2026
I’m totally on board with that for X3D encodings in general, but I’m
currently narrowing down to using an X3D Python “encoding,” not a binding.
On Tue, Jan 27, 2026 at 10:39 AM Bergstrom, Aaron <aaron.bergstrom at und.edu>
wrote:
> All,
>
>
>
> I keep a python dictionary that I pass a node type to in the form of a
> string, and it returns an x3d.py node object.
>
>
>
> I keep a custom version of x3d.py to which I’ve added CGE, X_ITE, and
> X3DOM (sort of) node classes, so I can also export experimental nodes such
> as a CGE Skin, X_ITE material extensions, or X3DOM CommonSurfaceShader.
>
>
>
> The dictionary includes all of the X3D 4.0 node types, as well as a
> variety of pending 4.1 nodes and browser specific nodes as described above.
>
>
>
> It basically looks like this:
>
>
>
> def instantiateNodeFromString(x3dType):
>
> x3dNodeMapping = {
>
> ####################################### A
>
> 'AcousticProperties':AcousticProperties,
>
> 'Analyser':Analyser,
>
> 'Anchor':Anchor,
>
> 'AnisotropyMaterialExtension':AnisotropyMaterialExtension, #
> X_ITE - glTF extension
>
> ***snip***
>
> 'VolumeData':VolumeData,
>
> 'VolumeEmitter':VolumeEmitter,
>
> 'VolumePickSensor':VolumePickSensor,
>
> ####################################### W
>
> 'WaveShaper':WaveShaper,
>
> 'WindPhysicsModel':WindPhysicsModel,
>
> 'WorldInfo':WorldInfo
>
> }
>
>
>
> return x3dNodeMapping[x3dType]()
>
>
>
>
>
>
>
> Aaron
>
>
>
> *From:* John Carlson <yottzumm at gmail.com>
> *Sent:* Tuesday, January 27, 2026 1:30 AM
> *To:* Don Brutzman <don.brutzman at gmail.com>
> *Cc:* Bergstrom, Aaron <aaron.bergstrom at und.edu>; X3D Ecosystem public
> discussion <x3d-ecosystem at web3d.org>
> *Subject:* Re: Loading into X3DPSAIL (for Maya and Blender)
>
>
>
> I think that Aaron was writing something that converted class names into
> X3D Python classes (and to scene graph objects?), but I haven’t heard much
> about it or if he imports X3D directly into Maya or some X3DPSAIL
> derivative (and then to Maya). I am will to work on something that
> generates a XML Python loader (from X3DUOM), just realize I haven’t decided
> on a single loader class or multiple loader classes. Opinions? At least I
> can take a first crack at it. I probably won’t use AI at all. I’ll study
> the structure of the Java version, but I do prefer ElementTree over DOM for
> this use case.
>
>
>
> Likely, it will be an adjunct to X3DPSAIL.
>
>
>
> I think the best test for reliability is to do roundtrip testing on the
> archive, which will also test XML output.
>
>
>
> John
>
> On Mon, Jan 26, 2026 at 6:01 PM Don Brutzman <don.brutzman at gmail.com>
> wrote:
>
> Yes "X3DLoaderDOM.java (load DOM into scenegraph)" was difficult to write,
> requires manual coding and time-consuming to debug. It works and the
> generator for it is checked into open source as a key part of X3DJSAIL.
>
> -
> https://www.web3d.org/specifications/java/javadoc/org/web3d/x3d/jsail/X3DLoaderDOM.html
> - (on web3d.org but direct access is blocked, library not is version
> control since it is large and changeable; copy attached)
>
> The PythonX3dSmokeTests.py program builds a lot of snippets of python
> scene graph. The same approach might be used to walk any X3D tree and
> construct a python scene graph. If such code works, and is reliable, we
> can promote that code and integrate it as part of the x3d.py distribution.
>
> -
> https://www.web3d.org/x3d/stylesheets/python/examples/PythonX3dSmokeTests.py
>
> all the best, Don
>
> --
>
> X3D Graphics, Maritime Robotics, Distributed Simulation
>
> Relative Motion Consulting https://RelativeMotion.info
>
>
>
>
>
> On Mon, Jan 26, 2026 at 2:54 PM John Carlson <yottzumm at gmail.com> wrote:
>
> Thanks for fixing the TODO to add XML!
>
>
>
> I have tried to add Python code which loads JSON into an X3DPSAIL scene
> graph and failed. I have zero confidence in my ability to load stuff into
> in memory scene graphs, preferring to load things into DOM first. This
> applies to much of my work, including JSON validation with X3D XML schema.
>
>
>
> I am attempting to load JSON into a CGE scene graph, but there’s no real
> evidence that it works yet. I have a mostly working DOM solution.
>
>
>
> I realize X3DLoaderDOM.java (load DOM into scenegraph) is a lot of work,
> and if this was mostly automated, please tell us how if it’s not a
> national secret. If we have that, then Python might be a lot easier!
>
>
>
> My overall plan is to push JSON things into DOM for loading, but Aaron
> might have a good solution for all encodings!
>
>
>
> I am reminded how Xj3D translated XML into a VRML scene graph. Not ideal,
> but.
>
>
>
> My priorities are first CGE, then Blender import. I realize my priorities
> change a lot. If we had a way to export into Blender from X3DPSAIL, this
> would make working on X3DPSAIL import much more attractive. Easier said
> than done.
>
>
>
> John
>
>
>
> On Mon, Jan 26, 2026 at 3:51 PM Don Brutzman <don.brutzman at gmail.com>
> wrote:
>
> Regarding C/C++/C# open source, no such library has yet been shared. As
> with our autogenerated Java and Python libraries, these are strong
> candidates for autogeneration once proper design patterns are written.
> Once written, library testing using the X3D Example Archives would be
> essential for success and straightforward to perform.
>
>
>
> Regarding X3D loaders in Python for X3DPSAIL, none has been written yet.
> Please be aware that .x3d files are written in valid XML. Refreshed TODO
> list:
>
> - Python X3D Package x3d.py, X3D Python Scene Access Interface Library
> (X3DPSAIL)
> - The x3d.py Python X3D Package supports programmers with Python
> interfaces and objects for standards-based X3D programming, all as open
> source.
> - https://www.web3d.org/x3d/stylesheets/python/python.html#TODO
>
> 🔖 <https://www.web3d.org/x3d/stylesheets/python/python.html#TODO> TODO
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Lots! Much progress continues. For a release-summary log, please see *history
> log for this page*.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
>
> - *TODO: clean up x3d.html documentation autogenerated by pydoc.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>*
> - *TODO: We need a "Getting Started" tutorial on this page. This is
> a good opportunity... who wants to help?!
> <https://www.web3d.org/x3d/stylesheets/python/python.html>*
> - *TODO: utility support for loaders from XML (.x3d or .xml),
> ClassicVRML (.x3dv), VRML97 (.wrl), and JSON (.json or .x3dj) files.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>*
> - *TODO: distribution support for Jupyter Notebook (initial example
> works), Apache Zeppelin notebook, Anaconda distribution of Python, and
> other data-science platforms.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>*
>
> To facilitate library review, I was recently able to autogenerate Python
> documentation for x3d.py using the pydoc tool.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> - *https://www.web3d.org/x3d/stylesheets/python/x3d.html*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Please note that each X3D node has the following methods listed.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Methods defined here:
> *HTML5*(self, indentLevel=0)
> Provide HTML5 output serialization using modified
> XML encoding with no singleton self-closing elements.
> *JSON*(self, indentLevel=0, syntax='JSON')
> Provide *X3D*
> output serialization using JSON encoding (usable for .json file suffix).
> *VRML*(self, indentLevel=0, VRML97=False)
> Provide *X3D*
> output serialization using VRML encoding (usable for .x3dv or .wrl file suffix).
> *XML*(self, indentLevel=0, syntax='XML')
> Provide Canonical *X3D*
> output serialization using XML encoding (usable for .x3d file suffix).
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Am thinking the HTML5 method is no longer needed, this was written when
> X3DOM had trouble with self-closing elements.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Thanks for all efforts that might improve x3d.py.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> all the best, Don
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> -- <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> X3D Graphics, Maritime Robotics, Distributed Simulation
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Relative Motion Consulting *https://RelativeMotion.info*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> On Sun, Jan 25, 2026 at 4:18 AM John Carlson <*yottzumm at gmail.com*> wrote:
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> I guess I didn't send this earlier.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> I did see the standards progress page. For C/C++/C#, are any libraries
> open source? I’m thinking COIN 3D, OpenInventor, H3D. Maybe others. I
> see there’s an ISO documentation for each language, but apparently the
> standard isn’t open source???? I’m looking for opportunities for X3DJSONLD
> serialization. OpenInventor (COIN 3D) looks super complex.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> For X3DPSAIL, can you point me at an example of loading XML or DOM into a
> scenegraph? Maybe I missed something???? I’m looking for something like
> CreateX3DFromString()??? I realized I can create Python from XML, just
> like my tools can go from JSON to DOM to Python; but my toolchain isn’t
> Python. Running stylesheets in Python would be a great example.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Looking here: <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
>
> *https://www.web3d.org/x3d/stylesheets/python/examples/PythonX3dSmokeTests.py*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> On Sun, Jan 25, 2026 at 12:19 AM Don Brutzman <*don.brutzman at gmail.com*>
> wrote: <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Standards planning status appears on the following page.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> - *X3D Standards Progress | Web3D Consortium*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
> - *https://www.web3d.org/x3d/progress*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Scroll past overview prose to find links to each version completed, in
> progress and planned.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> all the best, Don
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> -- <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> X3D Graphics, Maritime Robotics, Distributed Simulation
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Relative Motion Consulting *https://RelativeMotion.info*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> On Fri, Jan 23, 2026 at 7:44 PM John Carlson via X3D-Ecosystem <
> *x3d-ecosystem at web3d.org*> wrote:
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> A quick search reveals this page:
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> *https://wiki.web3d.org/wiki/index.php/X3D_Python_Language_Binding*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> This link on the page is dead?
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> *https://github.com/Web3DConsortium/X3D/tree/master/ISO-IEC%2019777*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
>
> Btw: both 19776-4 and 19776-5 are titled JSON encoding?????
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> ==================================
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> I could start writing a Python binding standard? Except we have three
> versions, one based on GraalPy/X3DJSAIL and one based on “normal”
> python-X3DPSAIL, and if course H3D, which AFAIK, has C++ underneath? I
> believe CGE may also have plans for Python.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> GraalPy examples are here:
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
>
> *https://github.com/coderextreme/X3DJSONLD/tree/master/src/main/graalpy/net/coderextreme*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Python examples are on the X3D archives, some duplicated here:
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
>
> *https://github.com/coderextreme/X3DJSONLD/tree/master/src/main/python/net/x3djsonld/data*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> It seems like the pure python implementation (pythonic) has more sway and
> implementations, so I am willing to capitulate, even though, in my
> experience, X3DJSAIL generates better JSON! It was never really my idea to
> go with a pure python version though, but I don’t know how to install
> GraalPy in Blender! I will pay anyone $100 if they can make blender run
> GraalPy for import/export addons on Windows! I’m guessing X3DPSAIL can run
> stylesheets as well? Perhaps it’s time to convert stylesheets to pure
> Java, with a stylesheet of course!
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> As far as support, GraalPy is supported by Oracle, and Python is supported
> by Microsoft (Does Guido still work there?).
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> It would be very nice to have a renderer for X3DJSAIL and X3DPSAIL (see
> previous post)! <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Has anyone used Xj3D from GraalPy?
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> ==================================
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> On Fri, Jan 23, 2026 at 8:52 PM John Carlson <*yottzumm at gmail.com*> wrote:
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Apologies, I just noticed I meant X3D python binding.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> On Fri, Jan 23, 2026 at 8:50 PM John Carlson <*yottzumm at gmail.com*> wrote:
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> What’s the status of the Python encoding standard? Would my
> participation help?
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> Instead of spending time on Blender currently, my thought is to go back to
> developing an “X3D” JSON to CGE scenegraph converter, as that can be
> developed beyond DOM loading. Does anyone know a good Pascal LLM? I do
> find begin/end rather tedious.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> If there’s a lot of demand for a Blender HAnim export currently, I will
> reconsider. Or X3D to glTF conversion.
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> John <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
> --
> X3D-Ecosystem mailing list
> *X3D-Ecosystem at web3d.org*
> *http://web3d.org/mailman/listinfo/x3d-ecosystem_web3d.org*
> <https://www.web3d.org/x3d/stylesheets/python/python.html>
>
>
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