[x3d-public] Blender > Exporting rig transforms to HAnim?

Tue Jun 27 19:46:23 PDT 2023

Here’s the stylesheet for generating x3d.py, AFAIK.  I haven’t used it.
One could modify it to import many encodings.  It’s probably better to
create a separate package.

I believe i have tried to write some sample python code to read JSON in
separate classes as a quick prototype.  I will do some digging.

https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/stylesheets/X3duomToX3dPythonPackage.xslt

Enjoy!

John

On Tue, Jun 27, 2023 at 9:39 PM John Carlson <yottzumm at gmail.com> wrote:

> There were two options with JSON to Python, generate python classes to
> input JSON like x3d.py outputs JSON, or do something like X3DJSONLD
> normally does.   I decided on the latter.  Someone can take another
> approach.   Go for it!
>
> John
>
> On Tue, Jun 27, 2023 at 9:04 PM GPU Group <gpugroup at gmail.com> wrote:
>
>> What I found useful about the auto-generated examples scenes like
>> helloworld.py in python for X3D.py: I could use them as examples for how to
>> use the X3D.py API.
>> What does the x3djsonld.py output scene load to? Do you have python
>> classes for nodes? If so you could substitute the X3D node classes for your
>> classes and bingo you have a json importer for x3d.py
>> -Doug
>>
>>
>> On Tue, Jun 27, 2023 at 7:34 PM John Carlson <yottzumm at gmail.com> wrote:
>>
>>> On first glance, this repo has not changed for a couple of years…vince?
>>>
>>> Also note that x3djsonld.py inputs JSON and outputs Python.
>>> X3dToPython.xslt would convert from XML to Python.
>>>
>>> My Python serializer is working towards near present Mojo capabilities,
>>> but Mojo does not currently support x3d.py library that i know of; a
>>> request for support has been entered.  Mojo is primarily suited for AI…that
>>> means support for compilation to multiple graphics/AI cards.
>>>
>>> Ideally, this will all land on a web page sometime.  The current Mojo
>>> playground is a Jupyter derivation.
>>>
>>> John
>>>
>>> On Tue, Jun 27, 2023 at 8:17 PM John Carlson <yottzumm at gmail.com> wrote:
>>>
>>>> I believe there is a repo for blender export/import.  Maybe Vince???
>>>> set it up and can add you?
>>>>
>>>> I can find a link, but it may be a private repo, not sure at this point.
>>>>
>>>> https://github.com/Web3DConsortium/BlenderX3DSupport
>>>>
>>>> Enjoy, if you can!
>>>>
>>>> John
>>>>
>>>> On Tue, Jun 27, 2023 at 4:42 PM GPU Group <gpugroup at gmail.com> wrote:
>>>>
>>>>> PHASE I complete:
>>>>> I have a Cube and light exporting via the 2-step with x3d.py
>>>>> - by hacking the current x3d exporter aka OFFICIAL exporter
>>>>> x so it doesn't do anything fancy / no gltf animations or hanim yet
>>>>> x no import
>>>>> * but has gltf export/import menu, ready for phase ii
>>>>> - I have the syntax worked out for going from blender to x3d aka b2x
>>>>> - temporary name: web3d x3dv exporter
>>>>> Q. should we have it in a community git / github repo, like gltf
>>>>> exporter? If so how to set it up so multiple parties can git push?
>>>>> -Doug
>>>>>
>>>>>
>>>>> On Thu, Jun 22, 2023 at 5:13 PM GPU Group <gpugroup at gmail.com> wrote:
>>>>>
>>>>>> John,
>>>>>> x3d.py looks interesting -- the node classes have XML, JSON, HTML,
>>>>>> VRML export functions (missing equivalent import functions?)
>>>>>> - I'll study it
>>>>>> -Doug
>>>>>>
>>>>>> On Thu, Jun 22, 2023 at 4:48 PM John Carlson <yottzumm at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Check out x3d.py X3DPSAIL for python graph.
>>>>>>> Check out x3djsonld.py (X3DJSONLD) for JSON -> x3d.py structures ->
>>>>>>> XML, HTML5,VRML, etc.
>>>>>>>
>>>>>>>  x3djsonld.py needs more work.
>>>>>>>
>>>>>>> John
>>>>>>>
>>>>>>> On Thu, Jun 22, 2023 at 4:51 PM GPU Group <gpugroup at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> A quick peek at gltf export/import: they do a 2-step conversion
>>>>>>>> blender scenegraph <=> gltf scenegraph <=> files (.gltf, .glb etc)
>>>>>>>> I've seen 2-step before, with collada exporter
>>>>>>>> I don't quite understand the need for the middle format - seems a
>>>>>>>> bit bureaucratic - but working well for them, perhaps easier to maintain
>>>>>>>> 2-way conversions per-node-class. And can export /import to different file
>>>>>>>> formats .x3dv and .x3d from same middle format. They also mention something
>>>>>>>> generated automatically from some specification.
>>>>>>>> Options:
>>>>>>>> 1. do what they do, except with a web3d python scenegraph in the
>>>>>>>> middle
>>>>>>>> a) if someone has one already, use that
>>>>>>>> b) generate one from specifications
>>>>>>>> c) manually create one in python
>>>>>>>> 2. copy their bender <=> gltf part, and change the gltf <=> files
>>>>>>>> part to x3dv,x3d
>>>>>>>> x but would be missing things that gltf doesn't have but web3d does?
>>>>>>>> 3. stick with 1-step, hack / upgrade current x3d exporter using
>>>>>>>> gltf blender <=> gltf as guide to getting all the blender goodies
>>>>>>>>
>>>>>>>> 1.a) Q. does anyone have python web3d node classes suitable for a
>>>>>>>> scenegraph, or b) can generate from specs?
>>>>>>>> Thanks,
>>>>>>>> -Doug
>>>>>>>>
>>>>>>>> On Thu, Jun 22, 2023 at 2:38 PM Brutzman, Donald (Don) (CIV) <
>>>>>>>> brutzman at nps.edu> wrote:
>>>>>>>>
>>>>>>>>> I too share that Blender->X3D conversion dream, Michalis!  8)
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Given that X3D data types are clearly defined with thorough
>>>>>>>>> animation/interaction support, and given that you have indeed mapped glTF
>>>>>>>>> 2.0 rendering into X3D 4.0 capabilities, it is reasonable for anyone
>>>>>>>>> pursuing this effort to expect that complete success of rendering and
>>>>>>>>> animation is indeed possible.  Good to know when pursuing worthy goals.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> 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
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> -----Original Message-----
>>>>>>>>> From: x3d-public <x3d-public-bounces at web3d.org> On Behalf Of
>>>>>>>>> Michalis Kamburelis
>>>>>>>>> Sent: Thursday, June 22, 2023 9:40 AM
>>>>>>>>> To: GPU Group <gpugroup at gmail.com>
>>>>>>>>> Cc: X3D Graphics public mailing list <x3d-public at web3d.org>
>>>>>>>>> Subject: Re: [x3d-public] Blender > Exporting rig transforms to
>>>>>>>>> HAnim?
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Blender->glTF exporter from Khronos (
>>>>>>>>>
>>>>>>>>> https://github.com/KhronosGroup/glTF-Blender-IO/ , regularly
>>>>>>>>> synched to the version bundled with Blender) has great support for
>>>>>>>>> animations.
>>>>>>>>>
>>>>>>>>> Simple animations (changing transformations), shape keys (this
>>>>>>>>> means "CoordinateInterpolator" in X3D), skinning (H-Anim in X3D). And it
>>>>>>>>> supports some more things too :) Like working textures, PBR, custom
>>>>>>>>> properties ("metadata" in X3D).
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I indeed dream that someone will have time to upgrade the
>>>>>>>>> Blender->X3D exporter to add there these capabilities, and yes, looking at
>>>>>>>>>
>>>>>>>>> Blender->glTF exporter is a reasonable approach for this.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Regards,
>>>>>>>>>
>>>>>>>>> Michalis
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> czw., 22 cze 2023 o 18:31 GPU Group <gpugroup at gmail.com>
>>>>>>>>> napisał(a):
>>>>>>>>>
>>>>>>>>> >
>>>>>>>>>
>>>>>>>>> > Thanks Michalis for info.
>>>>>>>>>
>>>>>>>>> > Q. Does another Blender exporter for another format (not x3d)
>>>>>>>>> export the rig transforms / animations?
>>>>>>>>>
>>>>>>>>> > Hypothesis: if another exporter does, then it would be possible
>>>>>>>>> to copy / adapt code from that exporter to x3d exporter.
>>>>>>>>>
>>>>>>>>> > -Doug
>>>>>>>>>
>>>>>>>>> >
>>>>>>>>>
>>>>>>>>> > On Thu, Jun 22, 2023 at 10:22 AM Michalis Kamburelis <
>>>>>>>>> michalis.kambi at gmail.com> wrote:
>>>>>>>>>
>>>>>>>>> >>
>>>>>>>>>
>>>>>>>>> >> The Blender->X3D exporter unfortunately doesn't support
>>>>>>>>> animations
>>>>>>>>>
>>>>>>>>> >> (of any kind - even simple transformations, not to mention
>>>>>>>>> skinning
>>>>>>>>>
>>>>>>>>> >> animation with H-Anim).
>>>>>>>>>
>>>>>>>>> >>
>>>>>>>>>
>>>>>>>>> >> Regards,
>>>>>>>>>
>>>>>>>>> >> Michalis
>>>>>>>>>
>>>>>>>>> >>
>>>>>>>>>
>>>>>>>>> >>
>>>>>>>>>
>>>>>>>>> >>
>>>>>>>>>
>>>>>>>>> >> czw., 22 cze 2023 o 18:16 GPU Group <gpugroup at gmail.com>
>>>>>>>>> napisał(a):
>>>>>>>>>
>>>>>>>>> >> >
>>>>>>>>>
>>>>>>>>> >> > If I make a skin and add a rig in Blender, on export, how do
>>>>>>>>> I get any rig transforms to export to HAnim along with the skin?
>>>>>>>>>
>>>>>>>>> >> > When I use the default x3d export, all I see is the skin in
>>>>>>>>> an IndexedFaceSet.
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>>
>>>>>>>>> x3d-public mailing list
>>>>>>>>>
>>>>>>>>> x3d-public at web3d.org
>>>>>>>>>
>>>>>>>>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> x3d-public mailing list
>>>>>>>> x3d-public at web3d.org
>>>>>>>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>>>>>>>>
>>>>>>>
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