[x3d-public] Transforms -> HAnimJoints

[GPU Group]

PS I looked at the X3D, WRL importer in blender, and they hack on the text
blob to generate some kind of  'AST' abstract syntax tree for both of
those, and then traverse that generic AST when converting to blender nodes.
So no dependencies on external parsers. I don't know if the same technique
would work for html and json.
-D

On Sat, Sep 16, 2023 at 6:32 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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