[x3d-public] ... X3D4 PBR Material textures: all [X3DSingleTextureNode] vice some [X3DTexture2DNode] ?

[John Carlson]

I’m wondering if repeatS/T/U should be repeat (MFBool)

On Sat, Sep 26, 2020 at 8:20 AM Michalis Kamburelis <
michalis.kambi at gmail.com> wrote:

> Yes to "use X3DSingleTextureNode throughout".
>
>
>
> I deliberately wanted to use the "only 2D" texture type for
>
> normalTexture and occlusionTexture in X3D 4.0 (to make X3D
>
> implementations easier). But I don't think anymore it's necessary. If
>
> no X3D browser developer will object here, I'm cool with using (more
>
> general) X3DSingleTextureNode type for them
>
>
>
> While 3D textures with normals, or cubemaps with normals, are not
>
> common -> but they make sense, we should allow them.
>
>
>
> Note that your comment about repeatS repeatT or textureProperties is not
> valid.
>
>
>
> - We absolutely *want* to have repeatS, repeatT, textureProperties for
>
> the 2D textures used with materials. And we will: since
>
> X3DSingleTextureNode is the ancestor of X3DTexture2DNode. So changing
>
> these fields (normalTexture and occlusionTexture) to
>
> X3DSingleTextureNode is only adding more possibilities, not taking
>
> away any. You can still place there "ImageTexture" and configure its
>
> repeatXxx field.
>
>
>
> - Other (non-2D) textures also have analogous fields, most texture
>
> nodes should have textureProperties, 3D texture nodes have repeatS/T/U
>
> etc. And that's all good :)
>
>
>
> - These all properties make sense on textures. Placing textures inside
>
> a material doesn't change anything here, it still makes sense to talk
>
> about texture repeat, filtering etc.
>
>
>
> Regards,
>
> Michalis
>
>
>
> sob., 26 wrz 2020 o 00:54 Don Brutzman <brutzman at nps.edu> napisał(a):
>
> >
>
> > Found a small inconsistency in X3D4 WD2 spec (while implementing the
> rest of "mapping" approach in X3D Schema and X3DUOM).
>
> >
>
> > Please look at node types in following, specifically
> [X3DSingleTextureNode] vs. [X3DTexture2DNode].
>
> >
>
> > =======================================
>
> > 12.4.5 Material
>
> >
>
> > Material : X3DOneSidedMaterialNode {
>
> >    SFFloat  [in,out] ambientIntensity          0.2          [0,1]
>
> >    SFNode   [in,out] ambientTexture            NULL
>  [X3DSingleTextureNode]
>
> >    SFString [in,out] ambientTextureMapping     ""
>
> >
>
> >    SFColor  [in,out] diffuseColor              0.8 0.8 0.8  [0,1]
>
> >    SFNode   [in,out] diffuseTexture            NULL
>  [X3DSingleTextureNode]
>
> >    SFString [in,out] diffuseTextureMapping     ""
>
> >
>
> >    SFColor  [in,out] emissiveColor             0 0 0        [0,1]
>
> >    SFNode   [in,out] emissiveTexture           NULL
>  [X3DSingleTextureNode]
>
> >    SFString [in,out] emissiveTextureMapping    ""
>
> >
>
> >    SFNode   [in,out] metadata                  NULL
>  [X3DMetadataObject]
>
> >
>
> >    SFNode   [in,out] normalTexture             NULL
>  [X3DTexture2DNode]
>
> >    SFString [in,out] normalTextureMapping      ""
>
> >    SFFloat  [in,out] normalScale               1            [0, ∞]
>
> >
>
> >    SFFloat  [in,out] occlusionStrength         1            [0,1]
>
> >    SFNode   [in,out] occlusionTexture          NULL
>  [X3DTexture2DNode]
>
> >    SFString [in,out] occlusionTextureMapping   ""
>
> >
>
> >    SFFloat  [in,out] shininess                 0.2          [0,1]
>
> >    SFNode   [in,out] shininessTexture          NULL
>  [X3DSingleTextureNode]
>
> >    SFString [in,out] shininessTextureMapping   ""
>
> >
>
> >    SFColor  [in,out] specularColor             0 0 0        [0,1]
>
> >    SFNode   [in,out] specularTexture           NULL
>  [X3DSingleTextureNode]
>
> >    SFString [in,out] specularTextureMapping    ""
>
> >
>
> >    SFFloat  [in,out] transparency              0            [0,1]
>
> > }
>
> > =======================================
>
> >
>
> > 18.3.2 X3DSingleTextureNode
>
> >
>
> > X3DSingleTextureNode : X3DTextureNode {
>
> >    SFNode [in,out] metadata NULL [X3DMetadataObject]
>
> > }
>
> > =======================================
>
> >
>
> > 18.3.4 X3DTexture2DNode
>
> >
>
> > X3DTexture2DNode : X3DSingleTextureNode {
>
> >    SFNode [in,out] metadata          NULL [X3DMetadataObject]
>
> >    SFBool []       repeatS           TRUE
>
> >    SFBool []       repeatT           TRUE
>
> >    SFNode []       textureProperties NULL [TextureProperties]
>
> > }
>
> > =======================================
>
> >
>
> > Looks like node type for every SFNode texture field in the new Material
> nodes should be [X3DSingleTextureNode] rather than any as
> [X3DTexture2DNode].  Doubtful we'd ever want to rely on repeatS repeatT or
> textureProperties when modulating materials.
>
> >
>
> > OK to use [X3DSingleTextureNode] throughout?
>
> >
>
> > 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
>
>
>
> _______________________________________________
>
> 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/20200926/e788d63f/attachment.html>