- From: Dominique Hazael-Massieux <dom@w3.org>
- Date: Fri, 7 Oct 2022 10:35:32 +0200
- To: public-immersive-web-wg@w3.org
- Cc: François Daoust <fd@w3.org>
Hi, As some of you may recall, W3C joined in June the Metaverse Standards Forum at its launch [1]. Since then, the Forum has been organizing itself to structure its work on "cooperation on interoperability standards needed to build an open and inclusive metaverse". Francois (copied) and I have been keeping track of that and are making our best to represent W3C's angle in this. Most recently, two so-called exploratory groups have been launched: - 3D Asset Interoperability using USD and glTF Exploratory Group - Real/Virtual World Integration Exploratory Group Exploratory groups are a bit similar to how W3C Community Groups are sometimes used, in that they enable a group of interested parties to come together to figure out what a more formally chartered group could accomplish to help make progress on the said topics. I've copied below the more detailed descriptions of these exploratory groups - if you feel the Immersive Web Working Group would like to bring specific input to these explorations, please let Francois and me know to make sure we convey it there. Naturally, each of you may also want to join the said groups directly in the Metaverse Standards Forum. Thanks! Dom 1. https://www.w3.org/blog/news/archives/9584 # 3D Asset Interoperability using USD and glTF Domain Exploratory Group Proposal ## Exploratory Group Scope Build consensus and draft a proposed charter for a 3D Asset Interoperability Domain Working Group. ## Potential Working Group Goals (and non-Goals) and Deliverables The proposed charter would set out goals and key activities to generate insights into leading 3D interoperability initiatives and to foster their evolution to meet prioritized industry use cases. Special attention would be paid to opportunities for cooperation between USD and glTF to increase synergy and reduce duplication of effort, gaps, fragmentation and confusion, for the good of the industry. Early examples of possible activities to be captured in the charter include: ● Investigations ○ Collect and organize metaverse use cases for real-time 3D asset interoperability, including authoring, delivery, and hybrid/integrated experiences including end-user created 3D content, individual assets, and scene containers of assets. Explore the requirements for the scope of 3D assets from geometry and material to sound, physics, composition, etc. ○ Identify current capabilities and fitness-for-purpose of USD, USDZ, and glTF to meet these use cases. USD was originally designed for authoring and glTF was originally designed for delivery, and now there appears to be interest for USD to be used for delivery and for glTF to add capabilities such as composition and behaviors. ○ Identify current material format capabilities including glTF PBR materials, USD materials, MaterialX, and MDL. ○ Identify the key subsets and roadmap gaps to advance USD and glTF, and enable robust authoring/delivery workflows using either USD or glTF or both in combination, e.g., USD distillation to glTF, USD to USD delivery, glTF re-mixing using USD-based tools ○ How do real-time use cases compare to offline use cases, and how may this evolve? ● Projects ○ Curate or create benchmarking assets to be made freely available, and to be used in the projects below ○ Prototype to understand USD and glTF performance and engineering complexity for delivery on a range of platforms ○ Survey and testing of format import and export robustness with key authoring tools ○ Prototype distillation of USD, including composed scenes and behaviors, to glTF/glXF ○ Prototype use of USD/glTF assets and behaviors in a wide variety of run-time engines, DCC tools, and the web, e.g., JavaScript and/or the DOM. ● Engagement ○ Collaborate with and complement existing USD and glTF open standards and open source efforts ○ Reach out to diverse engine vendors to experiment with benchmark assets and report back findings and issues ----------------------- # Real/Virtual World Integration Domain Exploratory Group Proposal ## Exploratory Group Goals This exploratory group will: ● Build consensus and draft a proposed charter for one or more Real/Virtual World Integration Domain Working Groups focusing on one or more of the topics mentioned below. ● Prioritize topics according to relevance, urgency and feasibility within the exploratory group. ● Specify concrete projects intended to result in running code/systems and demonstrations. The Real/Virtual World Integration Domain Working Group will not define new standards but rather coordinate with existing SDOs where appropriate. ## Potential Working Group Goals and Deliverables The scope of Real/Virtual World Integration includes: ● Definition of constructs describing the physical world (“reality”), ● Definition of constructs describing created content intended to represent or accompany entities in reality, ● Technical methods to integrate created (digital) content with reality. This will mean examining technologies such as: ● Describing the real world ○ Semantic representations ■ OGC CityGML 3.0, BIM-IFC etc. ■ EU INSPIRE semantic models ■ support semantic translation between publication and application ○ Unique real-world identifiers (ex. URIs) ■ encode position, bounding volume, semantic type, disambiguation ■ find or define URI registers, distributed if feasible ○ OGC GeoPose 1.0 ■ support transformation between publication and application spatial reference frames ■ support 6 degree-of-freedom geo-located poses ○ Digital Twins, IoT, WoT ■ Select, refine, or define efficient publish/subscribe protocols ■ Support federation of data from multiple vendors ■ Support harmonization of data from multiple sensor types [...] ■ Sensor ontologies (ex. https://www.w3.org/TR/vocab-ssn/) ■ Web of Things (WoT) Architecture W3C Recommendation ■ ISO/IEC DIS 21823-1 Interoperability for Internet of Things Systems - Part 1: Framework ● Affecting the real world ○ OGC SensorThings API Part 2 – Tasking Core ○ IEEE 7007-2021 Ontological Standard for Ethically Driven Robotics and Automation Systems ● Positioning/Localization ○ Visual Positioning Services ■ API standards ■ Parameter encodings ■ Digital twin integration (common base data) ● Discovery of spatial services and experiences ○ Discover real-world spatial services (ex. visual positioning service, reality modeling or digital twin service) ○ Discover real-world spatial experiences ○ Integration with reality models or digital twins (ex. real-world URIs) ○ Integration with real-world spatial experience creation environments ○ Decentralized or federated ● Open reality modeling platform (like OpenStreetMap++) ○ Open platform for prototyping, R&D etc. ○ Open data via crowdsourcing ○ Extensible Semantic Model. ○ Automated geo-alignment of digital twins ○ Open visual positioning service ○ http://openhybrid.org/index.html
Received on Friday, 7 October 2022 08:35:35 UTC