[X3D-Public] HAnim DiamondMan: review, adding support, improvements
Michael Aratow
maratow at noegenesis.com
Wed Apr 3 23:57:21 PDT 2013
Awesome work!!!
On 4/3/13 8:07 PM, Don Brutzman wrote:
> Joe and I are starting to slog through examples. William Glascoe
> cheered us on tonight. Here are notes, questions welcome.
>
> Our slogan is "the path to H-Anim 2 must first go through H-Anim 1."
> We've got to make sure all of the good work in the past is captured,
> documented, tested and repeatable. Here we go!
>
> 1. We reviewed specification and tooltips as part of this, making
> some nice clarifications to the tooltips.
> http://www.web3d.org/x3d/content/X3dTooltips.html#HAnimHumanoid
>
> 2. We next decided to first tackle the DiamondMan models.
>
> http://www.web3d.org/x3d/content/examples/Basic/HumanoidAnimation/DiamondManLOA-0.html
>
> http://www.web3d.org/x3d/content/examples/Basic/HumanoidAnimation/DiamondManLOA-0.x3d
>
>
> To avoid breaking the original copyright, we looked at whether
> shuffling Matt's metadata helped clarify things. For example:
>
> <Group DEF='OriginalAuthorMetadata'>
> <WorldInfo info='"HANIM 1.1 Default Joint Centers,
> Level-Of-Articulation 1
> -------------------------------------------------------- HANIM 1.1
> (VRML 2.0) Author name: eMpTy (a.k.a. Matthew T. Beitler) HANIM 1.1
> (VRML 2.0) Author email: beitler at graphics.cis.upenn.edu or
> beitler at acm.org HANIM 1.1 (VRML 2.0) Author homepage:
> http://www.cis.upenn.edu/~beitler HANIM 1.1 (VRML 2.0) Compliance
> Date: May 12, 1999 HANIM 1.1 Compliance Information:
> http://ece.uwaterloo.ca/~h-anim/ Construction Info (joint centers):
> The joint centers of this figure are based on the work of Norman
> Badler, director of the Center for Human Modeling and Simulation at
> the University of Pennsylvania. The original document which these
> joint centers are based on can be found at:
> http://www.cis.upenn.edu/~badler/anthro/89-71.ps, .pdf"' title='HANIM
> 1.1 Default Joint Centers, LOA0'/>
> <!-- Original HAnimHumanoid
> info='"authorEmail=beitler at graphics.cis.upenn.edu beitler at acm.org"
> "authorName=Matthew T. Beitler" "copyright=Copyright 1999 Matthew T.
> Beitler" "creationDate=05/12/99" "humanoidVersion=JointCenters 1.1
> LOA0" "usageRestrictions=PERMISSION TO FULLY USE THIS SCENE GRAPH IS
> GRANTED PROVIDED THIS COPYRIGHT INFORMATION AND DOCUMENTATION OF THE
> ORIGINAL AUTHOR IS INCLUDED. This humanoid scene graph is provided
> _as-is_ and without warranty of any kind express implied or otherwise
> including without limitation any warranty of merchantability or
> fitness for a particular purpose."' -->
> </Group>
>
> Still pretty darn confusing...
>
> 3. Attached are screen snapshots for how to X3D-Edit allows editing
> HAnimHumanoid node.
>
> Notice the tabbed support for the "info" field, breaking the
> information attributes into repeatable chunks.
>
> This is the kind of help that tools can provide to authors who are
> checking or creating content. Am hoping to do more and more of that.
>
> So this first examination took some time, but it helped us get
> recentered on what is possible and what can be improved.
>
> 4. The Quality Assurance checkbox in X3D-Edit showed the following
> scene errors in diamond man LOA 0:
>
> cvc-complex-type.4: Attribute 'name' must appear on element 'HAnimJoint'.
> cvc-complex-type.4: Attribute 'name' must appear on element 'HAnimJoint'.
> etc.
>
> So that is a previously unsuspected error in this scene (and others)
> that need to be fixed.
>
> Cool! The worst bugs are undiscovered bugs, now we found things to fix.
>
> Anyone can confirm this diagnosis using the X3D Validator.
> https://savage.nps.edu/X3dValidator
> http://www.web3d.org/x3d/content/examples/Basic/HumanoidAnimation/DiamondManLOA-0.x3d
>
>
> We traced down the reason for this requirement. It is found in the
> H-Anim 1.1 specification:
> http://h-anim.org/Specifications/H-Anim1.1/#nodes
> "The Joint node is also used to store other joint-specific
> information. In particular, a joint name is provided so that
> applications can identify each Joint node at runtime."
>
> We checked the H-Anim specification for each and every node. The name
> field is always required for each of the nodes.
>
> I checked our X3D Schematron rules and found that it would allow an
> empty name to pass through... ouch. now fixed!
>
> We also found that X3D DOCTYPES and X3D Schema were also
> inconsistent/mistaken about requiring the name fields... also fixed!
>
> Found another problem with suggested values. Future fix follows:
> - TODO confirm, add jointNames and segmentNames as shown in
>
> http://www.web3d.org/files/specifications/19774/V1.0/HAnim/concepts.html#Hierarchy
>
>
> These corrections will all be tested, confirmed OK and then pushed to
> our public sites, then announced separately.
>
> Way cool!! More bugs getting found for fixing, now and in future. 8)
>
>
> 5. Joe suspected that this LOA model is actually more complicated
> than it should be... so we checked. Yes it is more than Level 0, too
> many joints there. This led to a number of other issues which we
> explored.
>
> The H-Anim 1.1 spec lists legal Joint and Site values for each Level
> of Articulation (LOA).
> http://h-anim.org/Specifications/H-Anim1.1/appendices.html#appendixa
>
> This is very cool... also pretty mixed up. We found:
>
> - H-Anim specifications are not correctly linked (or labeled regarding
> status) on Web3d.org, Len and Dick can you please fix?
> - There is a lot of internal structure in HAnim that has always been
> pretty well defined but hard to follow
> - We will make improvements in validation and tools to help authors by
> taking advantage of this required structure
> - For example, X3D Schematron should be able to tell what LOA a scene
> actually is; we will write rules for that
> - We will start a wiki page dedicated to just listing fixes needed in
> the next round of H-Anim specification update (fixes and
> clarifications, not adding any brand-new functionality)
> - The Diamond Man examples in the archive are pretty good, but carry
> along baggage with them... We expect to start some new examples for
> LOA levels that match the spec more simply.
>
> Whew. Almost three hours to get just this far and we found even more
> to do... but lots of really solid progress!
>
> Totally encouraging. Comments and questions welcome. Thanks Joe and
> thanks William. Onward we go.
>
> all the best, Don
>
>
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