[x3d-public] Transforms -> HAnimJoints

Sun Sep 17 17:31:15 PDT 2023

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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