[x3d-public] X3D minutes 3 MAR 2022: announcements, SpotLight default values, NurbsSweptSurface NurbsSwungSurface found in FreeWrl, planning X3DOM WebXR

Fri Mar 4 09:18:38 PST 2022

Attendees: Anita Havele, Michalis Kamburelis, Vince Marchetti, Nicholas
Polys, Dick Puk, Doug Sanden, Don Brutzman.

Wow, another super-productive meeting.  Thanks to everyone for an intense
70-minute session.  Details follow.

From: Brutzman, Donald (Don) (CIV) 
Sent: Thursday, March 3, 2022 11:04 PM
To: X3D Public Mailing List (x3d-public at web3d.org) <x3d-public at web3d.org>
Cc: brutzman at nps.edu
Subject: X3D agenda 3 MAR 2022: announcements, Mantis issues,
NurbsSweptSurface NurbsSwungSurface, planning

1.       Regular Friday meeting Friday 08-0900 pacific, call information
follows.  All inputs and participation welcome.

Videoconference Connectivity:

*
https://us02web.zoom.us/j/81634670698?pwd=a1VPeU5tN01rc21Oa3hScUlHK0Rxdz09
*	https://zoom.us/j/148206572  Password 483805 
*	https://www.web3d.org/member/teleconference-information

2.       A lot of great things are happening!  Announcements welcome.   8)

*	https://www.web3d.org/x3d4
*	https://www.web3d.org/x3dv4-highlights

We discussed plans for a webinar by Michalis on Physically Based Rendering
(PBR) in X3D, including X3D interoperability with glTF.

Steady progress has continued on x3d.py with improved duck-typing
flexibility.  Problems remain however with the PyPi installation of x3d.py
not working properly, troubleshooting continues.

NPS has access to an interest point scan that might be of interest for
further projects.  More details to follow next week.  Preliminary
visualization available at

*	Digital 3D Scan of Sea Land Air Military Robotics (SLAMR) Lab, NPS
*
https://gitlab.nps.edu/Savage/Spiders3dPublic/-/tree/master/videos/demonstra
tions/SLAMR

3.       We have a few pending Mantis issues (e.g. Spotlight default values)
that maybe can be resolved.

*	https://www.web3d.org/member-only/mantis/view_all_bug_page.php

*	X3D4 Architecture
*
https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/
Architecture.html

We took yet-another tour through new examples, view3dscene showed great
precision.  Thank you Michalis for compelling and useful screenshots.

The working group achieved consensus on Spotlight default values, final
decision:

beamWidth = pi * 3 / 16

cutOffAngle = pi / 4

Dick and Don will propagate this change through specification,
schema/DTD/X3DUOM, X3D tooltips, autogenerated Java/Python/Turtle
implementations, converters and Mantis issue tracker.

Hooray!   8)

4.       Problem:  I'm not sure that NurbsSweptSurface and NurbsSwungSurface
are well defined.

*	X3D4 Architecture, 27 Nurbs Component, 27.4.11 NurbsSweptSurface
*
https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/
components/nurbs.html#NurbsSweptSurface

*	X3D4 Architecture, 27 Nurbs Component, 27.4.11 NurbsSwungSurface
*
https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/
components/nurbs.html#NurbsSwungSurface

a.	Got better figures?  No actual NURBS appear to be in the figures,
just spines.
b.	Got examples?
c.	First-pass discussion: what needs to be done to improve these?

Great news:  Doug Sanden showed us an example of NurbsSweptSurface and
NurbsSwungSurface in FreeWrl.  He will share models, screenshots

5.       Planning our next meetings

a.	11 MAR 2022, achieving WebXR support for X3DOM

*	https://www.x3dom.org

X3DOM has supported WebVR in the past.  Some people are apparently working
on adding WebXR support to X3DOM. There are some resources available, like a
migration guide.

https://github.com/immersive-web/webxr/blob/master/webvr-migration.md 

Given their importance, we are talking a look at how such efforts might
proceed for achieving best shared results.  We will also zoom back and
discuss overall plans for how X3DOM evolution will continue adoption of X3D4
features.

Michalis asks: Binary buffers in X3D, following glTF -- already in X3DOM,
plans to introduce it to X3D spec? Because we should at some point :)

*	Binary compression is a long-standing activity in X3D, Fraunhoffer
work led to refinement of those capabilities?
*	Should we add such buffers in X3D4.1, and perhaps encourage
implementation/evaluation in the near term as a Web3D Recommended Practice?

Dick asks: It would be interesting to see an updated list of X3DOM support
levels for each of the X3D4 components.

Nicholas notes: I really liked their image based compression (POP buffers).

We will also look at MAR Working Group to see if reviving is desirable and
possible.

https://www.web3d.org/working-groups/mixed-augmented-reality-mar

b.	18 MAR 2022, do we have complete implementations of X3D Geospatial
Component in X3D4 and public implementations?

*
https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/
components/geospatial.html

I'll have list of open geospatial issues ready.

We will determine next steps for our collaboration with Open Geospatial
Consortium (OGC).  For example, should we pursue 3D tiles?  Any other OGC
recommendation of high value?

Any interest in working on OGC GeoPose for HAnim? (Numerous links follow,
some are OGC member only)

*	http://www.geopose.org
*
https://gisuser.com/2020/01/ogc-announces-the-creation-of-new-geopose-standa
rds-working-group
*
https://github.com/opengeospatial/GeoPoseGuides/blob/main/reviewers_guide/pd
f/geopose-reviewers-guide.pdf
*	https://portal.ogc.org/files/?artifact_id=100082
*
https://github.com/opengeospatial/GeoPoseGuides/blob/working-draft/GeoPose-R
eviewers-Guide.pdf
*	https://github.com/opengeospatial/GeoPoseGuides/issues

6.       Michalis gave us a quick look at Khronos Certification Program.
Interesting good topic for future discussion.  See his recent email for
further details.

*	https://www.khronos.org/3dcommerce/certification
*	https://www.khronos.org/3dcommerce/certification/certified-viewers
*	https://github.com/KhronosGroup/3DC-Certification
*	https://github.khronos.org/3DC-Sample-Viewer

7.       As ever: no Web3D Consortium member-only information is included in
these public minutes.

and.   wait for it again.   Have Fun With X3D!     Or else.  8)

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 https://
faculty.nps.edu/brutzman

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