[x3d-public] X3D meeting minutes 28 July 2022: X3D4 Scene Access Interface (SAI) review

Fri Jul 29 10:18:06 PDT 2022

There was a meeting of X3D Working Group on Friday 29 July 2022 at 09-10
pacific.  Connection information and topics follow.

Attendees: Anita Havele, Doug Sanden, Don Brutzman.  Prior review and
inputs: Dick Puk.  Thanks!

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

1.	Doug Sanden described a lot of work he has going on with FreeWrl
code review, upgrading for X3D4.  Expect to hear more on the mailing list as
he progresses.

*	http://freewrl.sourceforge.net

2.	Web3D 2022 Confirmation (2-4 November 2022, Paris) Call for Papers -
real soon now!

*	https://web3d.siggraph.org

The 27th International Conference on 3D Web Technology, sponsored by
<https://www.siggraph.org/> ACM SIGGRAPH in cooperation with the
<https://www.web3d.org/> Web3D Consortium, is hosted by
<https://www.telecom-sudparis.eu/> Telecom SudParis.

Important dates:

*	https://web3d.siggraph.org/important-dates
*	Saturday 30 July:      Papers and Interactive Posters
*	Monday August 29: Tutorials, Industrial Use Cases, Workshops,
Competition.

Authors are invited to submit original work presenting fundamental research,
practice and experiments, or novel applications, in all areas of 3D graphics
on the web and related topics therein.

3.	SIGGRAPH activities: multiple big events this week!

a.	Web3D Ecosystem and the Metaverse - SIGGRAPH 2022 BOF

https://www.web3d.org/news-story/web3d-ecosystem-and-metaverse-siggraph-2022
-bof

https://s2022.siggraph.org/presentation/?id=bof_136&sess=sess335

https://www.web3d.org/event/web3d-bof-siggraph-2022

https://twitter.com/Web3DConsortium/status/1553065575512911876

Join the Web3D Consortium for a discussion on how our technology contributes
to the Metaverse. From Interactive Real-Time 3D, to Mixed Reality and
Humanoid Animation (HAnim), everything we do in 3D is significant to an open
Metaverse. See how our members are scaling expertise in 3D, Modeling and
Simulation, Geospatial, Augmented Reality, and Web Audio towards an open,
interoperable Metaverse. Our extensible 3D presentation layer brings 3D
content from different domains from across the WWW into rich, interactive 3D
worlds.

b.	ACM SIGGRAPH Cartographic Visualization (Carto) Birds of a Feather

https://s2022.siggraph.org/presentation/?id=bof_101&sess=sess155

The ACM SIGGRAPH Cartographic Visualization (Carto) session explores how
viewpoints and techniques from the computer graphics community can be
effectively applied to cartographic and spatial data sets.  Speakers
demonstrate their latest tools and application efforts.

c.	Immersive Visualization for Research, Science and Art

https://s2022.siggraph.org/presentation/?id=bof_128&sess=sess328

Traditionally, this session is on immersive visualization systems for
science and research, scientific visualization information visualization,
art and science. Invited speakers and panel discuss newest initiatives and
developments in visualization space.  Presentations included Nicholas Polys
on durability of X3D.

Tomasz Bednarz, NVIDIA and William Sherman, NIST

4.	Annual ISO/IEC JTC-1 SC24 meeting - progress report.

Under discussion, for all hours of day/night interspersed over a 4-week
period, are many topics.  X3D4, Smart Cities, VR/AR/MAR/XR,
virtual/augmented reality health and safety, more.  Next week will see
finalization of committee conclusions and recommendations.

5.	X3D4 Scene Access Interface (SAI) Review

Our "specification mosaic" diagram shows how all the many X3D-related
specifications fit together.

*	X3D Graphics Standards Relationships
*
https://www.web3d.org/specifications/X3dGraphicsStandardsRelationships.png

With the X3D4 Draft International Standard (DIS) complete and undergoing
national-body balloting by ISO/IEC, it is time to turn our sights on X3D4
SAI.  This document forms the abstract-API reference and common basis for
numerous other X3D APIs including EcmaScript (JavaScript), Java, Python, C,
C#, C++.

*	Information technology - Computer graphics, image processing and
environmental data representation - Extensible 3D (X3D) -
*	Part 2: Scene access interface (SAI) ISO/IEC 19775-2:2015
*	https://www.web3d.org/documents/specifications/19775-2/V3.3
*	X3D is a file format and related access services for describing
interactive 3D objects and worlds. X3D is designed to be used on the
Internet, intranets, and local client systems. X3D is also intended to be a
universal interchange format for integrated 3D graphics and multimedia. X3D
may be used in a variety of application areas such as engineering and
scientific visualization, multimedia presentations, entertainment and
educational titles, web pages, and shared virtual worlds.
*	This part of ISO/IEC 19775 defines the scene access interface that
can be used to interact with X3D worlds both from within the worlds or from
external programs.

Based on review/revision of X3D SAI 3.3 in 2015, led by Dick Puk and myself
for Web3D and ISO, this document is pretty mature.  I have performed a
careful document review, available at

*
https://www.web3d.org/specifications/X3dSaiReviewCommentsJuly2022.reduced.pd
f (14MB)

Under consideration, of general interest for future discussion:  can we help
distinguish between different primary use cases, namely

a.	Browser services (the current primary emphasis),
b.	Script node source code (sorta implicit), and
c.	Simple subset API used for model creation and authoring, no live
browser interactions needed.

If we get clearer about those three use cases, it may help all of our X3D
SAI APIs be clearer and more useful.

Request all interested parties look over this comments review.  Next
go-forward step will be putting X3D4 SAI into Github version control for
Web3D Consortium members.

Thanks for all input and participation.

Have fun with finishing Web3D 2022 papers/posters, watching SIGGRAPH videos,
and (deep breath) X3D4 SAI review!  8)

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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