[x3d-public] [x3d] Spec Comment by dougsanden on 19774-2: HAnim Motion Capture

[GPU Group]

Don,
Discuss Friday - yes sure maybe 5 minutes worth or so. I'm not sure how to
present. If you can push some of my links, that's good enough.
- Keep in mind I still have Motion implemented as spec'd.
- So these other things are 'extra' and don't wreck what's already
specified - you can still have Motion as spec'd.
- except what might be different for v4 based on this: the abstract type(s)
Motion inherits:
Motion: MotionPlay, MotionData
-Doug

On Wed, May 27, 2020 at 8:14 AM Don Brutzman <brutzman at nps.edu> wrote:

> [cc: x3d-public]
>
> Doug, thanks for this work.  It is interesting to consider that we might
> be able to map the HAnim specification's Motion object more effectively
> into X3D4 than the baseline HAnimMotion approach.
>
> [1] HAnim 2 Specification, Parts 1 and 2
>      https://www.web3d.org/documents/specifications/19774/V2.0/index.html
>
> [2] Humanoid Animation (HAnim): Motion Data Animation, Concepts
>
> https://www.web3d.org/documents/specifications/19774-2/V2.0/MotionDataAnimation/MotionDataAnimation.html
>
> https://www.web3d.org/documents/specifications/19774-2/V2.0/MotionDataAnimation/Concepts.html
>
> [3] Humanoid Animation (HAnim) 19774-2 part 2: clause 6 HAnim motion data
> animation using Motion objects
>
> https://www.web3d.org/documents/specifications/19774-2/V2.0/MotionDataAnimation/MotionNodes.html
>
> [4] Extensible 3D (X3D) 4.0 Tooltips: HAnimMotion
>      https://www.web3d.org/x3d/content/X3dTooltips.html#HAnimMotion
>
> [5] Web3D Mantis: view issues
>      https://www.web3d.org/member-only/mantis/view_all_bug_page.php
>
> TODO: Mantis issue needed.
>
> Wondering, might you present this issue during Friday morning's X3D
> Working Group teleconference?  Discussion would help, interested attendees
> welcome.  If you like we can record video too - whatever works.  Thanks for
> considering these possibilities.
>
> v/r Don
>
> On 5/27/2020 5:40 AM, Spec Feedback wrote:
> > -- Submitter indicates that this comment may be public: *Yes* --
> >
> > Comment on 19774-2: HAnim Motion Capture - V1.0
> > 4.4.4 mapping and Motion
> >
> >
> > -----------------
> > In previous comments I proposed having a split of Motion into MotionPlay
> and
> > MotionData/MotionDataFile nodes. With MotionDataFile and downloaing .bvh
> > mocap motion capture files off the internet, there are 2 issues
> > 1. mapping of joint names
> > 2. accumulating rotations over skipped/ignored joints
> > This comment is For issue#1, joint name mapping. In a previous comment I
> > enumerated ways to map:
> > 1. compiled in common name mappings
> > 2. geometrical mapping
> > 3. explicit name mapping
> > This comment is for method #3 explicit name mapping.
> > Currently: in our HH HAnimHumanoid we can name each joint whatever we
> want.
> > And in the Motion.joints field, we need to use the same naming scheme.
> The
> > Motion node and HH are in the same scene file and a single scene author
> would
> > author both nodes.
> > Proposed: for the split MotionData/MotionDataFile it will be handy to
> have
> > some way to re-use motions downloaded off the internet with multiple x3d
> > scenes without having to with name lookup permutations for each
> combination
> > of HH and MotionDataFile.
> > One way to add consistency / universality is to map HH names to a
> consistent
> > benchmark naming scheme, and same with downloaded bvh.
> > And one way to do that is with a field or node for mapping to LOA1, LOA2,
> > LOA3 standard joint names.
> > - each HH would have this mapping field/node to get from scene-authored
> joint
> > names to standard LOA names
> > - and each Motion, MotionData, MotionDataFile would also have a mapping
> from
> > its joint names to standard LOA names.
> > Then the code would do 2 lookups when matching joints to motions:
> > 1. HH name to standard LOA name
> > 2. standard LOA name to MotionData joint name
> > This 2=step process would allow different HH to be paired with different
> > MotionDataFile/MotionData without the scene author needing to redo
> naming for
> > each permutation - they would do mappings for each once.
> > -----------------
> >
> > Submitted on Wednesday, 2020,  May 27 - 6:40am
> > by dougsanden (dougsanden )
> > IP: 75.159.18.239
> >
> > See: https://www.web3d.org/node/1694/submission/4018
> > _______________________________________________
> > x3d mailing list
> > x3d at web3d.org
> > http://web3d.org/mailman/listinfo/x3d_web3d.org
>
> 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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