[x3d-public] Units for BVH vs HAnimMotion.values

[Joe D Williams]

> Um, then why is angle even listed here?

That is easy, take another look. 
Euler angles are not listed anywhere! 
Convert to axis-angle like showed in Part 2 and forget xyz angles/
Joe


-----Original Message-----
From: John Carlson <yottzumm at gmail.com>
Sent: Oct 13, 2023 6:15 PM
To: Joe D Williams <joedwil at earthlink.net>
Cc: <x3d-public at web3d.org>
Subject: Re: [x3d-public] Units for BVH vs HAnimMotion.values

Um, then why is angle even listed here? 
Confusing as heck!
 
https://www.web3d.org/documents/specifications/19775-1/V4.0/Part01/concepts.html#t-Standardunits
 
John
 




On Fri, Oct 13, 2023 at 7:19 PM Joe D Williams <joedwil at earthlink.net (mailto:joedwil at earthlink.net)> wrote:
> otherwise specified in a UNIT statement 

https://www.web3d.org/documents/specifications/19775-1/V4.0/Part01/concepts.html#Standardunitscoordinates

"However, the world coordinate units may be modified by specifying a different length unit using the UNIT statement."

There is Not Now nor will there Ever be a UNIT statement that allows degrees for rotation and orientation. 

Never, will angles appear in any x3d animation interpolator. 
To apply an import using angle units, it is converted to x3d before use, then discarded or possibly stored somewhere away from working area for reference.  

Thanks and Best,
Joe


-----Original Message-----
From: John Carlson <yottzumm at gmail.com (mailto:yottzumm at gmail.com)>
Sent: Oct 13, 2023 11:44 AM
To: X3D Graphics public mailing list <x3d-public at web3d.org (mailto:x3d-public at web3d.org)>
Subject: [x3d-public] Units for BVH vs HAnimMotion.values

Apparently BVH uses degrees for rotations.  Units for HAnimMotion should use radians unless otherwise specified in a UNIT statement, AFAIK. 
Comments?
 
Thanks!
 
John 





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