[x3d-public] Mantis 1392: 5.3.20 SFVec4d and MFVec4d default value (0 0 0 1) or (0 0 0 0) ?

[John Carlson]

My guess is it has to do with a perspective transformation.

John

On Sun, Mar 13, 2022 at 1:35 PM Brutzman, Donald (Don) (CIV) <
brutzman at nps.edu> wrote:

> Clause 5.3.20 SFVec4d and MFVec4d lists default value as (0 0 0 1)
>
>
>
> Why not (0 0 0 0) similar to other SFVec/MFVec fields?
>
>
>
>    -
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/fieldTypes.html#SFVec4dAndMFVec4d
>
>
>
> Similarly for 5.3.21 SFVec4f and MFVec4f
>
>
>
>    -
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/fieldTypes.html#SFVec4fAndMFVec4f
>
>
>
> Entered as
>
>    - Mantis 1392: 5.3.20 SFVec4d and MFVec4d default value (0 0 0 1) or
>    (0 0 0 0) ?
>    - https://www.web3d.org/member-only/mantis/view.php?id=1392
>
>
>
> all the best, Don
>
> --
>
> Don Brutzman  Naval Postgraduate School, Code USW/Br
> brutzman at nps.edu
>
> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA
> +1.831.656.2149
>
> X3D graphics, virtual worlds, Navy robotics https://
> faculty.nps.edu/brutzman
>
>
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