[x3d-public] Spec problem with 3D texture axes: wrong-handed coordinate system

[vmarchetti at kshell.com]

Attached is a revised Figure 33.1 for the X3D V4 specification under review.
This version of the figure was corrected to accurately match the description of the R S T coordinate axes as described in Sections 33.2.2 and 33.2.3 of https://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/texture3D.html <https://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/texture3D.html#f-3DTexture>

Vince Marchetti




> On Aug 27, 2021, at 9:58 PM, vmarchetti at kshell.com wrote:
> 
> Upon evaluation, this figure attached to the Aug 27 email is inconsistent with the specification text Section 33.2.3
> A corrected figure is forthcoming.
> 
> Vince Marchetti
> 
> 
>> On Aug 27, 2021, at 3:54 PM, vmarchetti at kshell.com <mailto:vmarchetti at kshell.com> wrote:
>> 
>> Please evaluate whether attached figure meets needs of X3DV4 specification document
>> 
>> SVG (via Inkscape) format available upon request
>> 
>> Vince Marchetti
>> 
>> 
>> <x3dV4_Fig33_1.png>
>> 
>>> On Aug 27, 2021, at 1:47 PM, Brutzman, Donald (Don) (CIV) <brutzman at nps.edu <mailto:brutzman at nps.edu>> wrote:
>>> 
>>> As noted in Mantis 978, https://www.web3d.org/member-only/mantis/view.php?id=978 <https://www.web3d.org/member-only/mantis/view.php?id=978>
>>> The following figure shows a left-handed coordinate system.
>>>  
>>> https://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/texture3D.html#f-3DTexture <https://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/texture3D.html#f-3DTexture>
>>>  
>>> <54CB4E59BAA24518B7648236A2468E3C.png>
>>>  
>>> Wondering how to fix – swap 2 axes can work.  Perhaps there is a commonly used diagram in OpenGL (or elsewhere) we might adopt and adapt?
>>>  
>>> Any volunteers to do this (pretty please) to improve X3D4 specification?
>>>  
>>> all the best, Don
>>> -- 
>>> Don Brutzman  Naval Postgraduate School, Code USW/Br       brutzman at nps.edu <mailto:brutzman at nps.edu>
>>> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
>>> X3D graphics, virtual worlds, navy robotics http://faculty.nps.edu/brutzman <http://faculty.nps.edu/brutzman>
>>>  
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