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

John Carlson yottzumm at gmail.com
Fri Aug 27 14:59:22 PDT 2021

On first glance, it looks good.  I would double check the standards text 
to see if it matches the conversion to x,y,z.

One may want to do a better job of perspective?

Perspective would probably be available in Blender or Titania. I've been 
trying out Titania a bit lately. It runs on Linux.  I'll see what I can 
to do duplicate your SVG with perspective.


On 8/27/21 2:54 PM, 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
>> 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 
>> roboticshttp://faculty.nps.edu/brutzman <http://faculty.nps.edu/brutzman>
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