[Korea-chapter] [X3D] Fwd: Jan 2013 H-Anim Teleconference minutes

[Joe D Williams]

Thank You Myeong and William.
I appreciate working together with you and All on these topics.

For h-anim skin to joint bindings for deformable skin, please see:

http://www.hypermultimedia.com/x3d/hanim/JoeH-AnimKick1a.x3dv
http://www.hypermultimedia.com/x3d/hanim/JoeH-AnimKick1a.txt

I think this example makes good reading because it clearly shows:
* h-anim skeleton hierarchy,
* joint to skin vertex animation bindings,
* an example skin drawn in skeleton space made up of mostly of 
currently specified site and feature points, and
* some simple keyframe interpolator animations that move the 
character, individual joints, and show deformable skin operation.

This model produces humanoid motion as expected in that
(1) translation and rotation of the humanoid root node moves the 
entire character, and,
(2) for instance, translation and rotation of the parent shoulder 
joint produces expected movement of the child arm, hand joints, and 
segments.

With added geometry to segment bindings please look at:
http://www.hypermultimedia.com/x3d/hanim/CombinedExample.zip
please unzip and run the file named :
JoeSkin4MGSkinDBonesRun3EX.x3dv

Center character combines the concepts of
(1) a skin mesh drawn in skeleton space bound to joints and
(2) individual shapes bound to segments.
Other .x3d files in that set will run fine alone but please turn on 
headlight.

Thanks Again for the opportunity to contribute.
Best Regards,
Joe


----- Original Message ----- 
From: ""Myeong Won Lee"" <mwlee at suwon.ac.kr>
To: <h-anim at web3d.org>
Cc: <korea-chapter at web3d.org>; <x3d at web3d.org>
Sent: Saturday, January 19, 2013 11:46 PM
Subject: [X3D] Fwd: Jan 2013 H-Anim Teleconference minutes


> Thank you for the H-Anim WG minutes, William.
> We also discussed the following responsible persons for all the 
> items.
> Please review this, and then add other persons appropriate for each 
> standardization item.
> =============
> 1) Definition of a humanoid character model capable of generating 
> motion from captured motion data ==> Myeong/Joe
> 2) Definition of a humanoid character model capable of generating 
> motion using 3D scanner data ==> Myeong/William
> 3) Definition of a humanoid character model capable of generating 
> motion using a general motion definition such as keyframe, 
> interpolation, kinematics, and dynamics for human figures ==> 
> Myeong/Joe
> 4) Definition of motion parameters for transferring or exchanging 
> motion between different human character models ==> Myeong/Dick
> 5) Definition of a motion data interface for including motion data 
> ==> Myeong/Dick
> 6) Definition of a motion viewer¡?s functionality ==> Myeong/Joe
> 7) Definition of interoperable human behavior prototypes  ==> 
> Don/William
> 8) Definition of a 3D skinning interface ==> Joe
> 9) Definition of a recording interface for human motion such as gait 
> ==> Don/William
> 10) Provision for easier exchange of characters from design systems 
> to H-Anim systems. ==> Myeong/Joe
> =============
>
> Sincerely,
>
> Myeong
>
>
>
>  On Sun, Jan 20, 2013 at 2:40 PM, <eosocxo at comcast.net> wrote:
>
>    Myeong Won Lee (Chair), Dick Puk, Joe Williams and William 
> Glascoe (Co-Chair) teleconferenced from 2000 - 2230 hrs Eastern, 
> Thursday, 03 Jan 2013
>
>    Myeong discussed her group's content creation process. They use 
> the skelton and skin together in their process.
>
>    Joe described how a couple of the H-Anim specification nodes 
> (skin coord index and skin coord weight) worked. We referenced a 
> H-Anim file Joe provided with a lot of vertices in the skin that are 
> all are bounded to a joint that uses a displacer for moving skin 
> independent of joint motion.
>
>    Joe discussed the Level of Articulation 3 (LOA3) skelton's joints 
> movement and its design rationale. We referred to the skin animation 
> in the same H-Anim file he provided (the running human) to 
> illustrate his points about joint translation and rotation.
>
>    Joe discussed which nodes his used in the H-Anim file we 
> referenced. He shared his observations of others' H-Anim files where 
> their skin wasn't built in skelton space. They were built in "skin 
> space". Joe reminded us the skin that Sandy Ressler built is 40 
> times larger than a normal adult (i.e., an 80-meter tall human). 
> There are 30,000 vertices used in that character--too many to 
> connect. The only way to use it is to bind to the joints some how.
>
>    Binding textured geometry to the segments. But we want a 
> realistic moving skin. In the skin node, ...face set... Most of 
> these are called "skull tip".
>
>    That other skelton is approximate 1.77 meters tall. Joe thinks 
> it's important to build a skin in skelton space to avoid a lot of 
> transformations.
>
>    If Joe's skin points correspond to his feature points then he has 
> a realistic character.
>
>    Joe's approach is close to MoCap. Some of the MoCap he has seen 
> doesn't worry about the skin. Authors create the skelton and put any 
> skin on it they want.
>
>    Willian discussed his relationship with Roger Nelson of 
> motionwerx and suggested Roger and Joe has a conversation about our 
> NWIP.
>
>    We assigned members to the NWIP line items and discussed our 
> strategy for soliciting Best Practices from technical sources.
>
>    The meeting adjourned at 2230.
>
>
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>
>
>
>
>
>
>


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