[Bf-usd] Support for Preliminary_Text

[Bastien Montagne]

Hi,

Having to suffer the FBX (in)famous case, I fully support Sybren's point 
here. I would also strongly advocate against working with any standard 
or extension of a standard which specifications are not publicly 
available. This is road to Hell and never-ending maintenance.

Cheers,
Bastien

On 4/25/22 11:47, Sybren A. Stüvel via Bf-usd wrote:
> On Thu, 21 Apr 2022 at 18:45, John Harrison via Bf-usd 
> <bf-usd at blender.org> wrote:
>
>     Implementing an importer as part of the same effort makes sense to
>     me (more work of course) because it balances the feature set and
>     will help with testing (import->export & compare). [...] Regarding
>     font point size, I would use Reality Composer as “ground truth”
>     and see how it maps font point sizes to designer units (meters
>     usually), then document my findings and follow suite.
>
>
> Public specifications are always better. If there is no other way, we 
> can try and follow what some proprietary application is doing, but 
> that opens the door to all kinds of nasty issues. The most important 
> aspect is that triagers and Blender developers won't be able to 
> reproduce bug reports. Being able to go through an export-import cycle 
> and see that the result is the same is a good start, but that's not 
> enough to ensure the implementation is correct.
>
> We have been in this situation with Alembic, where different 
> applications had different interpretations of certain data, and 
> Blender was stuck in the middle. I don't want to repeat this process 
> with USD. Especially when implementing support for a 3rd party 
> extension, I feel that we have to be careful and have a thorough 
> understanding of that extension before writing any code.
> Sybren
>
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-- 
----------------
Bastien Montagne
Blender Developer
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