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

Tue Jun 27 19:39:20 PDT 2023

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.
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>>
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>>>>>>>>
>>>>>>>> x3d-public at web3d.org
>>>>>>>>
>>>>>>>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>>>>>>>>
>>>>>>> _______________________________________________
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>>>>>>>
>>>>>>
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