[x3d-public] What are valid children of HAnimHumanoid.skin? argument for allowing containerFields in x3d.py

[John Carlson]

* I am specifically speaking of the lack of containerField in XML output
from x3d.py.  I also have issues with overuse of the “children”container
fields in VRML.  I am speaking of instances where view3dscene reports an
error or does not show the scene (even trying tovrmlx3d would help).   The
problem stems from lack of testing on HAnim VRML and XML outputs from
x3d.py.  I could show Don an example, but he’s got a whole section of the
archive devoted to examples which do show the same behavior when tested
properly.

One cannot just type in “containerField” in a python program and expect
x3d.py to list it in output.  I might be able to subclass, but that would
require my own X3dToPython.xslt stylesheet.

* Skin/shape is another topic in the email.  See standard, where Shape is
not mentioned under skin, rather, indexed mesh nodes are.  There is no
children field under Shape, but there’s a skin field under HAnimHumanoid.
Skin has an MFNode field type, and has SFNode children,  AFAIK.  The
question is whether these children should be Shapes or indexed meshes.

On Sat, Oct 28, 2023 at 2:16 PM Joe D Williams <joedwil at earthlink.net>
wrote:

> > argument for allowing containerFields in x3d.py
>
>
>
> I don't understand. If no container fields then not able to do all of x3d.
> We had to use containerField for the admittedly rare instance where the
> default is not true. These are cases where looking up the containerField in
> schema is not enough.
>
>
>
> Some are tricky, like skeleton where only the root Joint has to have the
> containerField as skeleton.
>
>
>
> skin contains a Shape which does not have children.
>
>
>
> However we are investigating the idea of  how to code LOD choices for
> skin. I think we already know how to do that for that for Segment geometry.
>
>
>
>
> Thanks,
>
> Joe
>
>
>
>
>
> -----Original Message-----
> From: John Carlson <yottzumm at gmail.com>
> Sent: Oct 26, 2023 10:08 AM
> To: Joe D Williams <joedwil at earthlink.net>, X3D Graphics public mailing
> list <x3d-public at web3d.org>
> Subject: What are valid children of HAnimHumanoid.skin? argument for
> allowing containerFields in x3d.py
>
>
>
> From: https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-DIS/Part01/components/hanim.html#HAnimHumanoid
>
> I see:
>
> MFNode     [in,out] skin                  []       [IndexedFaceSet, IndexedFanSet, IndexedQuadSet, IndexedTriangleSet, IndexedTriangleStripSet]
>
> And fromL https://www.web3d.org/documents/specifications/19774/V2.0/Architecture/ObjectInterfaces.html#Humanoid
>
> sequence<Object>   skin                  []           [indexed mesh objects as defined by the representation]
>
>
>
> But in actual practice, I see:
>
>
>
> <Shape DEF='Joe_Shape <https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Skin/JoeKick.html#Joe_Shape>' containerField='skin'>
>
> <Appearance DEF='Joe_skin_Appearance
> <https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Skin/JoeKick.html#Joe_skin_Appearance>
> '>
> <Material DEF='Joe_skin_Material
> <https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Skin/JoeKick.html#Joe_skin_Material>
> ' diffuseColor='0.3 0.3 0.6' emissiveColor='0.3 0.3 0.6'/>
> <ImageTexture DEF='JoeSkinImageTexture
> <https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Skin/JoeKick.html#JoeSkinImageTexture>
> '
>   url=' "JoeBodyTexture29.png
> <https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Skin/JoeBodyTexture29.png>"
> "
> https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Characters/JoeBodyTexture29.png
>
> <https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Characters/JoeBodyTexture29.png>"
> ' />
> <!-- *ROUTE* information for KickTextureTransform node:  [*from*
> SkinInterpolator.value_changed *to* rotation
> <https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Skin/JoeKick.html#ROUTE_194>]
> -->
> <TextureTransform DEF='KickTextureTransform
> <https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Skin/JoeKick.html#KickTextureTransform>
> '/>
> </Appearance>
>
> From:
>
>
> https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Skin/JoeKickIndex.html
>
> And
>
> skin [
>         DEF Joe_Shape Shape {
>           appearance DEF Joe_skin_Appearance Appearance {
>             material DEF Joe_skin_Material Material {
>               diffuseColor 0.3 0.3 0.6
>               emissiveColor 0.3 0.3 0.6
>             }
>             texture DEF JoeSkinImageTexture ImageTexture {
>               url [ "JoeBodyTexture29.png" "
> https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Characters/JoeBodyTexture29.png"
> ]
>             }
>             textureTransform DEF KickTextureTransform TextureTransform {
>             }
>           }
> ==================================================
> So it would seem like Shapes with an Indexed geometry is what we're aiming
> for in the standard as one of the possibly many children of the skin
> container field (note the space).
>
> That is all okay, AFAIAC, just extremely confusing when deciding where to
> add containerFields in DOM documents.
>
>
> For example, consider the below:
>
>                 <HAnimJoint USE='hanim_l_carpal_distal_interphalangeal_4'/>
>                 <HAnimJoint USE='hanim_l_metacarpophalangeal_3'/>
>                 <HAnimJoint
> USE='hanim_l_carpal_proximal_interphalangeal_3'/>
>                 <HAnimJoint USE='hanim_l_carpal_distal_interphalangeal_3'/>
>                 <HAnimJoint USE='hanim_l_metacarpophalangeal_2'/>
>                 <HAnimJoint
> USE='hanim_l_carpal_proximal_interphalangeal_2'/>
>                 <HAnimJoint USE='hanim_l_carpal_distal_interphalangeal_2'/>
> [ etc. ]
>
> It may not be apparent, but X3DJSAIL complains about this. There's no
> containerField='joints', right?  But I'm generating this code using x3d.py
> which doesn't allow me to list containerFields!
>
> Grr!  Here are some of the "brutzman" messages from X3DJSAI, which are
> valid.  I really want to assign joints as a containerField, so perhaps I
> will just do it in X3DJSONLD.
>
>     [apply] [error] X3DLoaderDOM: Parent-child node relationship not
> found! (parent HAnimHumanoid, child HAnimJoint, containerField='children')
> Please report this problem to brutzman at nps.edu
>     [apply] [error] X3DLoaderDOM: Parent-child node relationship not
> found! (parent HAnimHumanoid, child HAnimJoint, containerField='children')
> Please report this problem to brutzman at nps.edu
>     [apply] [error] X3DLoaderDOM: Parent-child node relationship not
> found! (parent HAnimHumanoid, child HAnimJoint, containerField='children')
> Please report this problem to brutzman at nps.edu
>     [apply] [error] X3DLoaderDOM: Parent-child node relationship not
> found! (parent HAnimHumanoid, child HAnimJoint, containerField='children')
> Please report this problem to brutzman at nps.edu
>     [apply] [error] X3DLoaderDOM: Parent-child node relationship not
> found! (parent HAnimHumanoid, child HAnimJoint, containerField='children')
> Please report this problem to brutzman at nps.edu
>     [apply] [error] X3DLoaderDOM: Parent-child node relationship not
> found! (parent HAnimHumanoid, child HAnimJoint, containerField='children')
> Please report this problem to brutzman at nps.edu
>     [apply] [error] X3DLoaderDOM: Parent-child node relationship not
> found! (parent HAnimHumanoid, child HAnimJoint, containerField='children')
> Please report this problem to brutzman at nps.edu
>     [apply] [error] X3DLoaderDOM: Parent-child node relationship not
> found! (parent HAnimHumanoid, child HAnimJoint, containerField='children')
> Please report this problem to brutzman at nps.edu
>
>
>
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