[X3D-Public] [h-anim] view3dscene support for h-anim visualization

Sat Aug 3 11:24:04 PDT 2013

Hi All,
Sorry I got some z and y planes mixed up in my description of the 
example skin(s) we need  (y-min is 0 and y-max is skull-tip; gaze +z) 
. I am relooking at that in terms of making actual requirements that 
Web3D can use to solicit specific contributions from members and 
public.

But, I hope we get the idea that we have a very good (can I say 
World-class) typical humanoid skeleton that is 'transportable' to 
other dimensions (meaning the Joint locations can be changed to 
accomodate a humanoid of given dimensions), and that now we need some 
example transportable skins.

Note that a skin is transportable between skeletons when the point 
index (skin vertex user code in order of appearance) is the same as 
the base skeleton Joint skinCoordIndex and skinCoordWeight parameters. 
If the vertex-to-Joint bindings remain the same, then each skin point 
location can be adjusted to fit specific human or humanoid surface 
dimensions.

That is why the general case best practice is:
* Start with complete skeleton that you can size to your dimensions,
* find or make segment and site geometry along with sensors and 
animations,
* find or make skin bound to that skeleton and adjust to your shape.
This provides a character that can be systematically customized to an 
individual and also is editable using your favorite text editor.

Web3D X3D HAnim and h-anim users have examples that show this path.
We need to get (some) skin(s) into the Web3D game.
We need 'free' bound skins for our 'free' skeletons!
Thanks and Best,
Joe

----- Original Message ----- 
From: "Joe D Williams" <joedwil at earthlink.net>
To: "Don Brutzman" <brutzman at nps.edu>; "Human Animation working group" 
<h-anim at web3d.org>
Cc: "Michalis Kamburelis" <michalis.kambi at gmail.com>; "X3D Graphics 
public mailing list" <x3d-public at web3d.org>
Sent: Wednesday, July 31, 2013 9:30 PM
Subject: Re: [h-anim] view3dscene support for h-anim visualization

>> view3dscene has some nice support for h-anim Joint visualization:
>> spheres and names (as text).
>
> Yes, wonderful to show the HAnim model data structure like that, 
> along
> with a hierarchy diagram to complete the basic documentation. Easy 
> to
> see the sparse detail of the feet and ankle in our current skeleton
> spec.
>
> A very nice way to start defining your personal character. Just edit
> the Joint center locations to your dimensions, save it with your 
> name
> on it, and you are off to a great start with a 'standard' ISO
> Humanoid.
>
> Great Guest, and of course my aim was to reveal the deepest details 
> of
> classic X3D HAnim, except I left out our end-effectors. I didn't
> mention our highly parameterized and instrumentable skeleton and 
> skin
> structures and barely hinted at the potential of haptic connections
> with this HAnim model. I also left out that I am sure that the 
> entire
> reason for VRML and X3D is to present the most realistic and
> responsive Humanoid possible for creative play in collaborative
> environments.
>
> Reminds me that we need a skin or two or three or maybe four.
>
> The idea is an example of about 30000 vertices, another example at
> maybe 8000 to 10000 points, another from about 7000 to 4000, and
> another with maybe 1500 or so.
> The intent is to align with the various levels of articulation
> possible with skeleton LOA0, 1, 2 and 3, ... . Each skin includes a
> mapped texture that identifies by mark the set of surface Site 
> (Annex
> A) and surface feature point (Annex B) locations.
>
> The binding details start with providing:
>
> (1) a continous-mesh that is drawn in tight 'A' pose (see HAnim
> skeleton default pose prior to animation), drawn in typical human
> space, 0 0 0 origin between the feet (root x and z at 0, xyz vertex
> position in meters (see example typical skeleton dimensions in Annex
> A), with point max-z at skull-tip site, with point index proceeding
> ccw in the same general order as the Humanoid skeleton hierarchy
> diagram given in the spec. The general intent is to group sets of
> vertices that will be bound to individual and adjacent Joint nodes.
>
> Further, it is preferred that the set of vertices that represent the
> position of defined surface features are preserved in each denisity
> rendition of the mesh.
>
> This geometry will be used as an HAnim Humanoid skin field.
>
> (2) All Joint skinCoordIndex[] and skinCoordWeight[] data for each
> particular skin binding to matching skeleton LOA. This data binds
> deformation animation of the skin.
>
> Together the skins and the appropriate index and weight data are 
> used
> as reference LOA examples to support HAnim and X3D implementations.
>
> Thanks Again,
> Joe
>
> ----- Original Message ----- 
> From: "Don Brutzman" <brutzman at nps.edu>
> To: "Human Animation working group" <h-anim at web3d.org>
> Cc: "Michalis Kamburelis" <michalis.kambi at gmail.com>; "X3D Graphics
> public mailing list" <x3d-public at web3d.org>
> Sent: Wednesday, July 31, 2013 5:44 PM
> Subject: [h-anim] view3dscene support for h-anim visualization
>
>
>> view3dscene has some nice support for h-anim Joint visualization:
>> spheres and names (as text).
>>
>> screenshot attached for HAnimSpecificationLOA3Invisible.x3d
>> http://www.web3d.org/x3d/content/examples/Basic/HumanoidAnimation/HAnimSpecificationLOA3Invisible.x3d
>>
>> invocation:  view3dscene -> edit -> Add Humanoids Joint
>> Visualization
>>
>> availability:
>>
>> http://www.web3d.org/x3d/content/examples/X3dResources.html#Applications
>>
>> Castle Game Engine is used to build view3dscene, a free
>> cross-platform
>> VRML/X3D browser that also supports other 3D model formats. 
>> (MacOSX,
>> Linux, FreeBSD)
>> http://castle-engine.sourceforge.net/view3dscene.php
>>
>> pretty cool!  Thanks Kambi.
>>
>> all the best, Don
>> -- 
>> Don Brutzman  Naval Postgraduate School, Code USW/Br
>> brutzman at nps.edu
>> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA
>> +1.831.656.2149
>> X3D graphics, virtual worlds, navy robotics
>> http://faculty.nps.edu/brutzman
>>
>
>
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>
>
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>

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