[x3d-public] Transforms -> HAnimJoints

Sun Sep 17 18:30:33 PDT 2023

I'm not seeing any huge bugs from the X3DV Blender plugin exports, except
JSON output.  Great work, Doug!

On Sun, Sep 17, 2023 at 7:31 PM John Carlson <yottzumm at gmail.com> wrote:

> This looks useful, perhaps the —debug-wm will help.
>
>
> https://blender.stackexchange.com/questions/6409/possible-to-replay-repetitive-tasks-using-python
>
> This will be the first time I launch the Blender GUI from the command line!
>
> I hope I will file a bug report without capturing a screenshot which might
> be difficult to read!
>
> Yay!
>
> John
>
>
> On Sun, Sep 17, 2023 at 7:20 PM John Carlson <yottzumm at gmail.com> wrote:
>
>> Is there some way in Blender to write a Python script from actions that
>> one is doing?  That would be key!
>>
>> Thanks for anyone’s help.  I gues i should get on my computer.
>>
>> I’ll search the Blender sites.
>>
>> John
>>
>> On Sun, Sep 17, 2023 at 7:15 PM GPU Group <gpugroup at gmail.com> wrote:
>>
>>> Of course I don't know the function calls. I always copy & hack. When I
>>> did io_scene_x3dv it was a hack of blender's io_scene_x3d exporter, so the
>>> export functions showed up under file > export without me having to think
>>> too deeply.
>>> But if you are adding export options -- for example "Export character as
>>> [ ] IFS [x] Hanim" then copy and hack and existing menu option in the
>>> exporter or that's how I do it. I don't even know the first line of an x3d
>>> or vrml scene file because I always copy and hack.
>>> -Doug
>>>
>>> On Sun, Sep 17, 2023 at 5:38 PM John Carlson <yottzumm at gmail.com> wrote:
>>>
>>>> I’ve installed it.  Can you provide or investigate the python function
>>>> calls that I can use with  a file name that will do an import and export?
>>>> I know you can’t just export visible stuff.
>>>>
>>>> This will help me a lot.
>>>>
>>>> Thanks!
>>>>
>>>> John
>>>>
>>>> On Sat, Sep 16, 2023 at 7:33 PM GPU Group <gpugroup at gmail.com> wrote:
>>>>
>>>>> 1. zip the io_scene_x3dv folder so you have io_scene_x3dv.zip
>>>>> 2. in Blender > Edit > preferences > Install button which will give
>>>>> you a file picker, pick your zip
>>>>> 3. still in preferences, make sure the box is checked to activate /
>>>>> turn it on
>>>>> Then it shows up in the File > Export list.
>>>>> If you make changes to it, re-zip, then uninstall from preferences
>>>>> first, before Install again and check box again
>>>>> -D
>>>>>
>>>>>
>>>>>
>>>>> On Sat, Sep 16, 2023 at 3:56 PM John Carlson <yottzumm at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Doug, basic information, like "How to export X3DV in a Blender python
>>>>>> script" is needed.  I am referring to:
>>>>>> https://github.com/dug9/BlenderX3DSupport  Please provide basic
>>>>>> information like how to run a script external to python would help.
>>>>>>
>>>>>> Something like:
>>>>>>
>>>>>> import bpy
>>>>>>
>>>>>> # bpy.ops.import_scene.fbx(filepath =
>>>>>> "../../Tufani/LILY_7_3_BLEND.fbx")
>>>>>> bpy.ops.wm.open_mainfile(filepath="LILY_7_3_BLEND.blend")
>>>>>> bpy.ops.export_scene.x3dv(filepath="fooLily.x3dv")
>>>>>>
>>>>>>
>>>>>> I will try from the Blender GUI next.
>>>>>>
>>>>>> John
>>>>>>
>>>>>> On Fri, Aug 25, 2023 at 2:15 PM GPU Group <gpugroup at gmail.com> wrote:
>>>>>>
>>>>>>> i'm currently testing with
>>>>>>>
>>>>>>> https://freewrl.sourceforge.io/tests/26_Humanoid_Animation/BoxmanBVH_play.x3d
>>>>>>>
>>>>>>> - uses freewrl extra nodes HAnimMotionPlay : HAnimMotion and
>>>>>>> HAnimMotionDataFile HAnimMotionData
>>>>>>> https://freewrl.sourceforge.io/tests/26_Humanoid_Animation/play.x3d
>>>>>>> - a handy heads-up Proto for playing files
>>>>>>> (run,stop,rewind,end,increment,slidebar)
>>>>>>>
>>>>>>> https://freewrl.sourceforge.io/tests/26_Humanoid_Animation/BoxmanBVH_play.png
>>>>>>> and in combination with script in the above scene file I can compare
>>>>>>> specific animation frames between blender, bvhacker and freewrl, can be
>>>>>>> adapted to HAnimMotion (doesn't depend on any HAnim nodes itself).
>>>>>>> -Doug
>>>>>>>
>>>>>>> On Fri, Aug 25, 2023 at 12:44 PM John Carlson <yottzumm at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Yeah, I was trying to write quaternions on shoulder stuff to get
>>>>>>>> from A Pose to I Pose.
>>>>>>>>
>>>>>>>> If you have a good test suite, please share.  One thing that I
>>>>>>>> found out was you're supposed to multiply on the left of center by the
>>>>>>>> quaternion and on the right by the inverse quaternion???  Online
>>>>>>>> documentation goes all over the board.  I'm thinking of resorting to
>>>>>>>> THREE.js. Maybe The C/C++/C# SAI has something?
>>>>>>>>
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>>
>>>>>>>> John
>>>>>>>>
>>>>>>>> On Fri, Aug 25, 2023 at 1:36 PM GPU Group <gpugroup at gmail.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> John, that's great we'll need you.
>>>>>>>>> I haven't worked on the blender exporter in weeks, you are welcome
>>>>>>>>> to start that HAnim export part if you like.
>>>>>>>>> https://github.com/dug9/BlenderX3DSupport
>>>>>>>>> Right now I'm struggling to load .bvh files at random with
>>>>>>>>> bvhacker https://github.com/DaveDubUK/bvhacker as a cleaning
>>>>>>>>> tool.  There are lots of recorded bvh motion files to download and use. But
>>>>>>>>> even bvhacker needs work -- for example ensuring  Y-UP (blender exports
>>>>>>>>> .bvh Z-UP), mapping to HAnim LOA names/selecting the right LOA, ARMS_DOWN
>>>>>>>>> default pose.
>>>>>>>>> For example when using a T-pose .bvh file (the T geometry is
>>>>>>>>> recorded in the OFFSETs field and angles are relative to that pose) on an
>>>>>>>>> ARMS_DOWN HAnim, the shoulder/arm rotations aren't correct. BVHacker does
>>>>>>>>> some channel swapping X--Y, but similar technique in freewrl doesn't work
>>>>>>>>> reliably (yet).
>>>>>>>>> SUMMARY: I'm in the same zone with the hanim transforms but stuck
>>>>>>>>> back a few steps in getting freewrl to play a .bvh with good shoulder
>>>>>>>>> animation. So stuck for a while but open to coordinating with you on HAnim
>>>>>>>>> and blender exporter.
>>>>>>>>> -Doug
>>>>>>>>>
>>>>>>>>> On Fri, Aug 25, 2023 at 12:21 PM John Carlson <yottzumm at gmail.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> Doug,
>>>>>>>>>>
>>>>>>>>>> I have some code I've been working on that converts VRML
>>>>>>>>>> Transforms with DEFs to HAnimJoints.  Maybe we should collaborate on Hanim
>>>>>>>>>> Blender export. I'm also looking for something that will apply
>>>>>>>>>> transforms to joint centers, if you have something tested and separate from
>>>>>>>>>> FreeWRL.
>>>>>>>>>>
>>>>>>>>>> Thanks,
>>>>>>>>>>
>>>>>>>>>> John
>>>>>>>>>>
>>>>>>>>> _______________________________________________
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>>>>>
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>>
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