[x3d-public] Mantis 1410: HAnimHumanoid skin definitions have no way to assign textures

Mon Dec 5 11:25:03 PST 2022

Don, my comment was more about examples in HAnim 2 Standard Annex.   If one
wants to put an example with skin in the HAnim 2 annexes, that would be
great.  You have identified a problem with the body of the standard, I have
identified a problem with annex.

I do not know a way to handle cases where there is an unmentioned field.  I
haven’t checked Joe Kick yet.

But yeah, conscientious attitudes are welcome too.   We’re playing the long
game.   I feel very bad about not being able to read everything.

A skin field is welcome!  I will add to Mantis.

CFE?

John

On Mon, Dec 5, 2022 at 12:08 AM Brutzman, Donald (Don) (CIV) <
brutzman at nps.edu> wrote:

> Hi John.  We use Mantis for tracking possible issues in the specifications.
>
>
>
> The problem in the X3D4 specification appears to be that there is no way
> to assign textures to skin geometry.
>
>
>
> The Mantis issue (copied into this email) also proposes a solution that
> fixes the problem.
>
>
>
> 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 https://
> faculty.nps.edu/brutzman
>
>
>
> *From:* John Carlson <yottzumm at gmail.com>
> *Sent:* Sunday, December 4, 2022 9:37 PM
> *To:* Brutzman, Donald (Don) (CIV) <brutzman at nps.edu>
> *Cc:* X3D Public Mailing List (x3d-public at web3d.org) <x3d-public at web3d.org>;
> h-anim at web3d.org
> *Subject:* Re: [x3d-public] Mantis 1410: HAnimHumanoid skin definitions
> have no way to assign textures
>
>
>
> There is no derivation that i see.
>
>
>
> On Sun, Dec 4, 2022 at 11:33 PM John Carlson <yottzumm at gmail.com> wrote:
>
> Don, I did notice  that there were no skins on an HAnim Motion 2 example.
> I will check the repository again tomorrow.
>
>
>
> Is Joe Kick ok?
>
>
>
> Do HAnim nodes derive from some Shape type?
>
>
>
> John
>
>
>
> On Sun, Dec 4, 2022 at 6:14 PM Brutzman, Donald (Don) (CIV) <
> brutzman at nps.edu> wrote:
>
> Joe and I were working with various HAnim models today (using X3D-Edit!)
> and found an important problem.no
> <https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fproblem.no%2F&data=05%7C01%7Cbrutzman%40nps.edu%7C5d268e66e3bd4a1b641208dad682c3c8%7C6d936231a51740ea9199f7578963378e%7C0%7C0%7C638058154388250563%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=r7SLQX2f7kU06P02fp7%2BD%2BJFpvmdPAhZPZP22lESlDA%3D&reserved=0>
>
>
>
>
>
>    - Mantis 1410: HAnimHumanoid skin definitions have no way to assign
>    textures
>    - https://www.web3d.org/member-only/mantis/view.php?id=1410
>
>
>
> HAnimHAnimHumanoid skin definitions have no way to assign textures because
> Shape nodes are not currently allowed in the X3D4 parent-child node
> hierarchy.
>
> * X3D4 Architecture, HAnim component, 26.3.2 HAnimHumanoid
> *
> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-DIS/Part01/components/hanim.html#HAnimHumanoid
>
> Relevant field is
>   MFNode [in,out] skin [] [IndexedFaceSet, IndexedFanSet, IndexedQuadSet,
> IndexedTriangleSet, IndexedTriangleStripSet]
>
> It is possible to assign color values, through use of Color or ColorRGBA
> nodes within IndexedFaceSet, for example. However, because Shape is not
> permitted, there is no way to assign corresponding Appearance with either
> Material or ImageTexture.
>
>
>
> The following example shows animated skin with a texture, playable in
> X_ITE (and X3DOM and BSContact) players.
>
> * X3D Example Archives: Humanoid Animation, Characters, Joe Kick
> *
> https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Characters/JoeKickIndex.html
>
> Excerpt:
> <Shape DEF='Joe_Shape' containerField='skin'>
>   <Appearance DEF='Joe_skin_Appearance'>
>     <Material DEF='Joe_skin_Material' diffuseColor='0.3 0.3 0.6'
> emissiveColor='0.3 0.3 0.6'/>
>     <ImageTexture DEF='JoeSkinImageTexture'
>   url=' "JoeBodyTexture29.png" "
> https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Characters/JoeBodyTexture29.png"
>  '/>
>     <!-- ROUTE information for KickTextureTransform node: [from
> SkinInterpolator.value_changed to rotation ] -->
>     <TextureTransform DEF='KickTextureTransform'/>
>   </Appearance>
>   <IndexedFaceSet DEF='Joe_skin_IndexedFaceSet' etc.
>      <Coordinate DEF='Joe_SkinCoord' point= etc.
>      <TextureCoordinate point='0 0 0.5 0.5 0.5 0 0 0.5'/>
>   </IndexedFaceSet>
> </Shape>
>
>
>
> HAnim specification says
>
> * HAnim specification version 2 volume 1, 6 Object interfaces, 6.2 Humanoid
> *
> https://www.web3d.org/documents/specifications/19774/V2.0/Architecture/ObjectInterfaces.html#Humanoid
>
> sequence<Object> skin [] *[indexed mesh objects as defined by the
> representation]*
>
>
>
> An example “representation" for HAnim is X3D.
>
> Possible fix:
> a. Allow Shape node, in addition to IndexedFaceSet etc. (Matching Joe's
> example)
> b. Note in the X3D4 specification prose that such a Shape node must
> contain one of those same nodes (IFS, ITS etc.).  That will allow identical
> geometry capabilities that are currently clearly defined.
>
>
>
> Note that the animated Korean characters did not display such a problem
> because they are apparently textures are part of HAnimSegment that is
> animated, which is part of skeleton field hierarchy, and not part of skin
> field.  For example,
>
>    - X3D Example Archives: Humanoid Animation, Characters, Jin LOA 4
>    - Articulated 3D game character designed with a general graphics tool,
>    then converted into an X3D HAnim model.
>    -
>    https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Characters/JinLOA4Index.html
>
>
>
>
>
> We recommend
>
>    - Taking a generous view of HAnim2 wording “*[indexed mesh objects as
>    defined by the representation]”*
>    - to allow identical usage of a Shape node, thus ensuring that
>    textures are possible on animated human skin.
>    - Such an approach is already demonstrated in our examples, so it is
>    feasible and expected.
>
>
>
> Sincerely yours, Joe and Don.
>
>
>
>
>
> 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 https://
> faculty.nps.edu/brutzman
>
>
>
> _______________________________________________
> x3d-public mailing list
> x3d-public at web3d.org
> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20221205/d17bc33e/attachment-0001.html>