[x3d-public] Transforming a humanoid in X3DJSAIL/x3d.py

[John Carlson]

I want joint centers recomputation.

It would be nice to have instead of writing it myself.

Joh

On Fri, Aug 25, 2023 at 10:39 AM Joe D Williams <joedwil at earthlink.net>
wrote:

> > Okay, as I thought before, HAnimDisplacers are for skin.
>
>
>
> HAnimDisplacer intended to work with any geometry of  the humanoid.
>
> skin, segment, and site geometry.
>
>
> > What I want is programmatic control of the scenegraph.Please investigate
> the X3D SAI. You can take control of a browser, then build and interact
> with the scene. And you can share it with others. Really, have a good look
> at SAI external and internal interfaces. Challenge to find better model for
> live, realtime, interactive scenegraph. > So input XML, programmatically
> manipulate the scenegraph, and export scenegraph to XML. Right, basically
> any x3d browser needs to do that. You can create a gui to help authortime
> or interface directly through the SAI, then when you are ready, just create
> a text file showing the current scene user code. Text in and text out.> I
> don’t wish to change hierarchical relationships of the Humanoid, just the
> numbers.The hierarchical relationships are designed to be flexible, but
> realistic in articulation. It appears to me that the science is putting
> some numbers in the right place and the art is getting those numbers to
> perform.>I’m not sure what the abstract SAI does.Then this will be a great
> epic voyage.And, hopefully not a test of your patience with x3d
> toolmakers.
>
>
>
> Thanks,
>
> Joe
>
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: John Carlson <yottzumm at gmail.com>
> Sent: Aug 25, 2023 1:15 AM
> To: Anita Havele <anita.havele at web3d.org>, Don Brutzman <brutzman at nps.edu>,
> GPU Group <gpugroup at gmail.com>, Joe D Williams <joedwil at earthlink.net>,
> Michalis Kamburelis <michalis.kambi at gmail.com>, X3D Graphics public
> mailing list <x3d-public at web3d.org>
> Subject: Re: Transforming a humanoid in X3DJSAIL/x3d.py
>
>
> Okay, as I thought before, HAnimDisplacers are for skin.  I read the
> standard a bit.   What I want is programmatic control of the scenegraph.
> Not for visual animation, but to put the humanoid in a certain position,
> like server-side headless (lol)  animation.  So input XML, programmatically
> manipulate the scenegraph, and export scenegraph to XML.  I don’t wish to
> change hierarchical relationships of the Humanoid, just the numbers.
>
> John
>
> On Fri, Aug 25, 2023 at 2:53 AM John Carlson <yottzumm at gmail.com> wrote:
>
>> What I’m trying to say is:  setScale, setTransform, setScale are
>> inadequate.  What one wants is applyScale, applyRotation,
>> applyTransform—like doing animation on the scenegraph in X3DJSAIL.
>>
>> I’m not sure what the abstract SAI does.
>>
>> I think that HAnimDisplacers may be meant for this, but the documentation
>> is currently inadequate in X3DJSAIL to be usable.  I don’t get it!
>>
>> Do i need a displacer near every joint?
>>
>> Thanks for listening!
>>
>> John
>>
>> On Fri, Aug 25, 2023 at 2:30 AM John Carlson <yottzumm at gmail.com> wrote:
>>
>>> Would X3DJSAIL or x3d.py include libraries to transform a HAnim
>>> Humanoid?  This would be an important addition/example.  I know Joe has
>>> been pushing me in this direction.
>>>
>>> I’m still trying to get to the point where I can take JSON (or XML) as
>>> input to …, transform it, and output XML or JSON.
>>>
>>> I’m not going to write matrix multiplication code in XSLT if I can help
>>> it.
>>>
>>> Supporting JSON input is important to me.  I realize that i can create
>>> Java or Python code with a stylesheet, and then modify it.  What good
>>> matrix libraries work with X3DJSAIL or x3d.py? Or are they built in?
>>>
>>> This is important because we are getting VRML code out of tools which
>>> aren’t HAnim, and we can probably transform them to HAnim.  WIP.
>>>
>>> I do not know if DOM is adequate for doing Matrix multiplication, but I
>>> think we should be able to do the transforms anywhere in the scenegraph,
>>> not just DOM.
>>>
>>> It’s not a really a matter of I/O, it’s a matter of processing.
>>>
>>> I’m going to go look at X3DJSAIL documentation now.
>>>
>>> Thanks for listening!
>>>
>>> John
>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20230825/1ee7d4ae/attachment.html>