[x3d-public] Transform processing

[Holger Seelig]

Yes I can confirm, that the glTF specification is equivalent to X3D and will produce same results, and can easily be converted to a Transform node hierarchy.

Best regards,
Holger

—
Holger Seelig
holger.seelig at yahoo.de


> Am 08.01.2026 um 02:13 schrieb Don Brutzman via x3d-public <x3d-public at web3d.org>:
> 
> Looks functionally and mathematically equivalent to me.
> 
> A more detailed definition is probably available in the WebGL Specification. 
> 
> Browser builders can say whether they use transformation matrixes on the inside of their source, too. 
> 
> all the best, Don
> -- 
> X3D Graphics, Maritime Robotics, Distributed Simulation
> Relative Motion Consulting  https://RelativeMotion.info <https://relativemotion.info/>
> 
> 
> On Wed, Jan 7, 2026 at 19:20 Joe D Williams via x3d-public <x3d-public at web3d.org <mailto:x3d-public at web3d.org>> wrote:
>> can I get a comment about comparing these two text descriptions?
>> Thanks,
>> Joe
>> -----Original Message-----
>> From: Extensible 3D (X3D) Graphics public discussion <x3d-public at web3d.org <mailto:x3d-public at web3d.org>>
>> Sent: Dec 21, 2025 10:11 AM
>> To: <x3d-ecosystem-request at web3d.org <mailto:x3d-ecosystem-request at web3d.org>>, <x3d-public at web3d.org <mailto:x3d-public at web3d.org>>
>> Cc: Joe D Williams <joedwil at earthlink.net <mailto:joedwil at earthlink.net>>
>> Subject: [x3d-public] Transform processing
>> 
>> glTF
>> https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#transformations
>> 
>> X3D
>> https://www.web3d.org/documents/specifications/19775-1/V4.0/Part01/components/grouping.html#Transform
>> 
>> 
>> Attached is cut from glTF standard and X3D standard.
>> I need to make sure these produce same result, except glTF has no center parameter.
>> Thanks and Best,
>> Joe
>> 
>> 
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