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

John Carlson yottzumm at gmail.com
Fri Oct 13 18:15:07 PDT 2023


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>
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>
> Sent: Oct 13, 2023 11:44 AM
> To: X3D Graphics public mailing list <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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