[x3d-public] Blender importer plans (HAnim to Blender)

[John Carlson]

Here’s some example code for HAnim joints to Blender bones which could be
generalized for Blender import:

https://github.com/coderextreme/X3DJSONLD/blob/master/blend/blenderskeleton.py

One could add HAnim sites, segments and weights.  I can “export” these
things, but I have no experience with Blender import. Sites and segments
can translate to transforms(?), but weights are kind of mysterious, and
will require some searching online.

I do not currently know how to attach anything to bones, but bones
themselves.

John

On Fri, Dec 29, 2023 at 7:53 PM John Carlson <yottzumm at gmail.com> wrote:

> There’s a very good “mapping” from X3D to Blender here:
>
>
> https://github.com/Web3DConsortium/BlenderX3DSupport/blob/main/io_scene_x3d/import_x3d.py
>
> Starting at line 1487.
>
> I suggest we use this code going forward for any Blender X3D importer.
>
> The JSON conversion to nodes call can be added around line 3526.
>
> There seem to be 2 tasks:
>
> 1. Converting JSON to nodes, like what is done for XML and WRL.
>
> 2.  Converting HAnim to appropriate Blender structures (bones and named
> transforms)
>
> Probably I would be best qualified for JSON processing and Doug could work
> on the second task?  Anyone else want to volunteer?
>
> Could we leverage the io_scene_x3dv addon for JSON?
>
> Thanks!
>
> John
>
>
> On Fri, Dec 29, 2023 at 6:46 PM John Carlson <yottzumm at gmail.com> wrote:
>
>> Here are my current plans for HAnim import into Blender.
>>
>> 1. Upgrade current WRL and X3D importer to current HAnim standards.
>> Convert joints to bones and sites and segments to transforms, include
>> geometry attached to skeleton, sites and segments.  Convert
>> OrientationInterpolators to keyframe animation.
>>
>> 2.  Possible JSON to DOM conversion in Python.
>>
>> 3.  I don’t have current plans to use x3d.py due to difficulty to read in
>> various encodings.  Help would be appreciated.
>>
>> John
>>
>
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