[x3d-public] Differences in default values of TextureProperties Spec vs X3DUOM vs Tooltips

[Holger Seelig]

Thank you Michalis for explaining this change. This all makes much sense.

Best regards,
Holger

--
Holger Seelig
Leipzig, Germany

holger.seelig at yahoo.de
https://create3000.github.io/x_ite/

> Am 03.02.2025 um 12:57 schrieb Michalis Kamburelis <michalis.kambi at gmail.com>:
> 
> The default for minificationFilter , magnificationFilter has changed,
> the new correct default is "DEFAULT" (which, in turn, means
> "browser-specified default magnification/minification mode").
> 
> See my email from 2013 August for reasons:
> https://web3d.org/pipermail/x3d-public_web3d.org/2013-August/002496.html
> .
> 
> We did the change in spec around 2022-03-09 (that's when I see I
> changed it in CGE implementation, though I cannot find the x3d-public
> relevant thread). See CGE notes:
> https://castle-engine.io/x3d_implementation_texturing.php .
> 
> Basically, before the change, TextureProperties was a bit of a trap,
> because changing:
> 
> ImageTexture {
>   url "sample.png"
> }
> 
> ->
> 
> ImageTexture {
>   url "sample.png"
>  textureProperties TextureProperties {
>  }
> }
> 
> ...was a "trap", because it unintuitively also changed the filtering
> of "sample.png" to "fastest" (which should mean "nearest"). This was
> unexpected for authors (I stumbled into this trap, I had other X3D
> users of CGE that stumbled into this trap).
> 
> Now (with new default) the above change does nothing, which is more
> intuitive (since you didn't set any TextureProperties fields) ->
> before and after the change, browser uses default
> minification/magnification. IOW, mere existence of TextureProperties
> node makes no change above.
> 
> Regards,
> Michalis
> 
> pon., 3 lut 2025 o 11:07 Holger Seelig via x3d-public
> <x3d-public at web3d.org> napisał(a):
>> 
>> The three fields have in Spec a default value of „DEFAUT“ and in X3DUOM and Tooltips a default value of „FASTEST“. Which one is the correct value?
>> 
>> Field SFString 'minificationFilter' in node TextureProperties has different value (Spec <=> X3DUOM): DEFAULT !== FASTEST. Field SFString 'magnificationFilter' in node TextureProperties has different value (Spec <=> X3DUOM): DEFAULT !== FASTEST.
>> Field SFString 'textureCompression' in node TextureProperties has different value (Spec <=> X3DUOM): DEFAULT !== FASTEST.
>> 
>> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/components/texturing.html#TextureProperties
>> https://www.web3d.org/specifications/X3dUnifiedObjectModel-4.0.xml
>> https://www.web3d.org/x3d/content/X3dTooltips.html#TextureProperties
>> 
>> Best regards,
>> Holger
>> 
>> --
>> Holger Seelig
>> Leipzig, Germany
>> 
>> holger.seelig at yahoo.de
>> https://create3000.github.io/x_ite/
>> 
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>> x3d-public at web3d.org
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