[x3d-public] X3DUOM: Missing emissiveColor field in X3DOneSidedMaterialNode

[Michalis Kamburelis]

Correction: "But is perfectly valid and probably more comfortable." ->
I wanted to write "That is perfectly valid and probably more
comfortable.", i.e. that you can place emissiveColor at
X3DOneSidedMaterialNode level .

Regards,
Michalis

pt., 2 lut 2024 o 01:56 Michalis Kamburelis <michalis.kambi at gmail.com>
napisał(a):
>
> I'm guessing this may be a consequence of change to X3D 4.0 spec done
> lately in the process.
>
> 1. Initially "emissiveColor" was present in X3DOneSidedMaterialNode,
> since it makes sense for all (current and future) descendants.
>
>     See initial spec,
> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-WD2/Part01/components/shape.html#X3DOneSidedMaterialNode
> )...
>
> 2. ...but we needed to specify different default values for it.
> Namely, UnlitMaterial needed default "emissiveColor 1 1 1", while
> others needed "emissiveColor 0 0 0". Don said that such thing cannot
> be expressed in some X3D validation tools, so the decision was to
> formally remove the "emissiveColor" from X3DOneSidedMaterialNode, and
> just add it to "UnlitMaterial", "Material", "PhysicalMaterial".
>
>     See the later spec that no longer has emissiveColor in
> X3DOneSidedMaterialNode:
> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-IS.proof/Part01/components/shape.html#X3DOneSidedMaterialNode
> .
>
> I would still encourage implementations that can to just define
> emissiveColor at X3DOneSidedMaterialNode level, and merely change the
> default in UnlitMaterial to a different one. But is perfectly valid
> and probably more comfortable. But if you cannot, then define
> emissiveColor at each of (3) possible descendants.
>
> I do not know what is optimal course of action for X3DOUM -- I'm just
> giving some spec background above.
>
> Regards,
> Michalis
>
> czw., 1 lut 2024 o 22:40 Holger Seelig via x3d-public
> <x3d-public at web3d.org> napisał(a):
> >
> > I discovered a small problem with X3DOUM, as mentioned in the email subject, the AbstractNodeType X3DOneSidedMaterialNode is missing the emissiveColor field, which can be copied from Material, probably.
> >
> > Best regards,
> > Holger
> >
> > --
> > Holger Seelig
> > Leipzig, Germany
> >
> > holger.seelig at yahoo.de
> > https://create3000.github.io/x_ite/
> >
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