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

[Brutzman, Donald (Don) (CIV)]

Looks outstanding to me, we will review.  Thanks Vince.

p.s. if you created an X3D model to produce this, am happy to check it into version control  We have a section in the X3D archives for specification figures.

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 http://faculty.nps.edu/brutzman

From: vmarchetti at kshell.com<mailto:vmarchetti at kshell.com>
Sent: Saturday, August 28, 2021 8:04 AM
To: X3D-Public<mailto:x3d-public at web3d.org>
Subject: Re: [x3d-public] Spec problem with 3D texture axes: wrong-handed coordinate system

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

[cid:C7A5C751-3499-4599-8796-42078B88503E at attlocal.net]



On Aug 27, 2021, at 9:58 PM, vmarchetti at kshell.com<mailto: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
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

<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

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