[x3d-public] Transforms -> HAnimJoints

[John Carlson]

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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