[x3d-public] X3D minutes 25 June 2020: SIGGRAPH and Web3D conference dates, Mantis issue review, many opportunities

Fri Jun 26 12:49:24 PDT 2020

About glTF support in Castle Game Engine: I have a lot of links if anyone
is interested :)

- First of all you can get latest view3dscene (download at the top of
https://castle-engine.io/view3dscene.php now, use latest "snapshot" 3.19
version) and actually test it :)

- Just open any glTF model you find on the web! It will work (and if it
doesn't, submit a bugreport please :) ). Sketchfab has a lot of impressive
models you can download for free in glTF format:
https://sketchfab.com/features/gltf . Khronos has a collection of sample
glTF models on open-source licenses:
https://github.com/KhronosGroup/glTF-Sample-Models/

- Documentation about glTF support in Castle Game Engine is on
https://castle-engine.io/creating_data_model_formats.php#section_gltf

- There were many announcements in 2020 about the glTF progress in CGE.
Here they are, from newest to oldest, if you are interested in details:

===============
- Gamma Correction and Tone Mapping
  https://castle-engine.io/wp/2020/06/20/gamma-correction-and-tone-mapping/

- Reading punctual lights from glTF
  https://castle-engine.io/wp/2020/06/11/reading-punctual-lights-from-gltf/

- Huge optimizations of glTF animations, pool of scenes for FPS game,
limited PBR specular-glossiness support

https://castle-engine.io/wp/2020/04/25/huge-optimizations-of-gltf-animations-pool-of-scenes-for-fps-game-limited-pbr-specular-glossiness-support/

- Lots of glTF work, new X3D extensions and conversion improvements

https://castle-engine.io/wp/2020/04/19/lots-of-gltf-work-new-x3d-extensions-and-conversion-improvements/

- Fun with Sketchfab plugin in Blender, testing glTF performance

https://castle-engine.io/wp/2020/04/11/fun-with-sketchfab-plugin-in-blender-testing-gltf-performance/

- Testing glTF with models from Sketchfab, improved per-vertex rendering
from glTF

https://castle-engine.io/wp/2020/04/11/testing-gltf-with-models-from-sketchfab-improved-per-vertex-rendering-from-gltf/

- glTF skinned animation in Castle Game Engine

https://castle-engine.io/wp/2020/04/01/gltf-skinned-animation-in-castle-game-engine/

- Blender exporters upgrades and fixes, glTF unlit support,
castle-anim-frames improvements, loading a series of models for animation

https://castle-engine.io/wp/2020/03/22/blender-exporters-upgrades-and-fixes-gltf-unlit-support-castle-anim-frames-improvements-loading-a-series-of-models-for-animation/

- Physically-Based Rendering and lots of other lighting and materials
upgrades (in Castle Game Engine and X3D 4.0)

https://castle-engine.io/wp/2020/03/07/physically-based-rendering-and-lots-of-other-lighting-materials-upgrades-in-castle-game-engine-and-x3d-4-0/
===============

Best regards and have a good weekend everyone,
Michalis

pt., 26 cze 2020 o 19:17 Don Brutzman <brutzman at nps.edu> napisał(a):

> Attendees: Michalis Kamburelis, Doug Sanden, Vince Marchetti, Dick Puk,
> Don Brutzman
>
> Confirmed: no member-only info is present in these minutes.
>
> We meet at our regular time and Zoom coordinates, Friday 08-0930 pacific
> (your time zone may vary).
>
> ---
>
> 1. *Participation Information*
>
> [1] Web3D Teleconference Information
>      https://www.web3d.org/member/teleconference-information
>
> Please use the following link for all Web3D Consortium Meetings.
>
> Join URL:
> https://us02web.zoom.us/j/81634670698?pwd=a1VPeU5tN01rc21Oa3hScUlHK0Rxdz09
>
> Meeting ID: 81634670698      Meeting Password: 483805
>
> One tap mobile
>      US (New York) +1 929 205 6099,,(nine-digit number from Join URL
> above)#
>      US (San Jose)  +1 669 900 6833,,(nine-digit number from Join URL
> above)#
>
> ---
>
> Agenda items:
>
> 2. Planning
>
> a. Conference dates announced, SIGGRAPH
> https://s2020.siggraph.org/conference
> "Beginning 17 August, on-demand content will be available. This will allow
> exploration, learning, and the opportunity for participants to review
> presentations in advance of interactive sessions with contributors
> beginning 24 August. Additionally, 24–28 August will include other various
> “can’t miss” scheduled sessions. For the convenience of participants,
> on-demand content will continue to be available for viewing through 27
> October."
>
> b. Web3D 2020 CFP announced.
>     http://2020.web3dconference.org
>
> https://www.siggraph.org/the-25th-international-web3d-conference-call-for-papers-and-posters/
>
> Important Dates:
>
> July 27: Deadline for authors’ submission of papers (manuscripts for
> review, not just abstracts) to EasyChair; with no extensions. The paper
> review process starts immediately
> Aug 17: Reviews and rankings due from reviewers; Chairs make initial
> decision on acceptance, rejection, or returning to author for modification
> and resubmission. Authors not yet informed of decisions
> Sept 7: Final decision on acceptance/rejection of papers and posters, with
> notification of authors.
> Sept 21: Deadline for authors of accepted papers and posters to submit
> final ‘camera-ready’ manuscripts.
>
> c. 15 July Web3D Member Meeting, is being planned by Anita.
> Demonstrations welcome, briefings are planned by each working group chair.
>
> d. Revised timeline to X3D4 Draft publication: expected release 15 July.
> Dick and I will plan to brief it.
>
> e. Opportunities for engagement and contribution are many, we will include
> them each week in the minutes.
>
> ---
>
> 3. Michalis Kamburelis will be presenting Friday July 3.  We hope to
> review and accept Pull Request 8 next week to integrate Physically Based
> Rendering (PBR) and lighting with glTF support.  We will recording this
> zoom session.
>
> [3.0] [WIP] PBR and other lighting and material upgrades #8
>        https://github.com/Web3DConsortium/X3D/pull/8
>
> This will be an important session, with key parts recorded via Zoom.
> Implementers interested in X3D4 are always welcome guests.
>
> FYSA, Castle Game Engine has an impressive set of recent announcements
> which illustrate these important rendering capabilities.
>
> [3.1] Gamma Correction and Tone Mapping, 20 JUN 2020
>
> https://castle-engine.io/wp/2020/06/20/gamma-correction-and-tone-mapping
>
> [3.2] Easy property to make animation blending, 19 JUN 2020
>
> https://castle-engine.io/wp/2020/06/19/easy-property-to-make-animation-blending
>
> [3.3] Reading punctual lights from glTF, 11 JUN 2020
>
> https://castle-engine.io/wp/2020/06/11/reading-punctual-lights-from-gltf
>
> ---
>
> 4. MultiTouch remains a topic of interest.
>
> Need specification prose including node signature, example scene, multiple
> implementations.
>
> Original capabilities need to be matched by a second implementation prior
> to specification approval.
>
> Possible MultiTouch example:  children's picture puzzle.  Select and drag
> pieces into place, double-select (i.e. double-touch) and rotate to snap
> into place.
>
> ---
>
> 5. Mantis issue discussion
>
> a. Particle component
>
> ======================================================================
> [5.1] Mantis 1307, X3DParticleEmitterNode mass and surfaceArea accessType
> initializeOnly rather than inputOutput?
>        https://www.web3d.org/member-only/mantis/view.php?id=1307
>
>         Wondering why X3DParticleEmitterNode mass and surfaceArea have
> accessType initializeOnly rather than inputOutput?
>
> Way back when first defined, there was likely concern about computational
> complexity if changed at run time.
>
> However these values would still seem to be variables in direct use at run
> time. So being able to modify them would seem to have no computational
> overhead and might provide interesting animation effects.
>
> Applies to ConeEmitter, ExplosionEmitter, PointEmitter, PolylineEmitter,
> SurfaceEmitter, VolumeEmitter nodes.
> ======================================================================
>
> This is an important visualization technique for fluids, flows, fluxes etc.
>
> No harm seen in changing these fields. Allowing run-time modification
> seems reasonable. Whether an existing implementation complies is a separate
> matter.
>
> Accept this as proposed change to X3D4.  If anyone has a different
> opinion, reasons against doing this are welcome.
>
> ---
>
> b. Navigation issues review, discussion
>
> [5.2] Mantis 1310: near, far clipping planes indirectly specified by
> NavigationInfo, consider addition to X3DViewpointNode
>        https://www.web3d.org/member-only/mantis/view.php?id=1310
>
> ======================================================================
> [5.3] Mantis 1264: NavigationInfo type TURNTABLE HELICOPTER GAME FREEFLY
>        https://www.web3d.org/member-only/mantis/view.php?id=1264
>
> * X3DOM Documentation: Navigation
>
> https://doc.x3dom.org/tutorials/animationInteraction/navigation/index.html
>
> * X3DOM Turntable Mode Example
>    https://www.x3dom.org/x3dom/example/x3dom_turntable.html
>
> Note that this mode has a "typeParams" field to pass parameters. This is a
> concern.
>
> Since type is customizable by browsers, including such a field
> ("modeParameters" perhaps) might be a good way to encourage continued
> innovation, experimentation and extensibility of navigation modes.
>
> * [in out] MFFloat modeParameters []
>
> We should extract and generalize parameters when they are applicable to
> multiple/most navigation types. Must be careful to coexist and not get side
> effects with existing modes. For example:
>
> * [in out] SFBool rollable TRUE
>
> * [in out] SFFloat minTiltAngle -pi [-pi, pi]
> * [in out] SFFloat maxTiltAngle pi [-pi, pi]
>
> * [in out] SFFloat minRollAngle -pi [-pi, pi]
> * [in out] SFFloat maxRollAngle pi [-pi, pi]
> ======================================================================
>
> c. Screen size
>
> ======================================================================
> [5.4] Mantis 1268: allow height and width attributes for X3D scene?
>        https://www.web3d.org/member-only/mantis/view.php?id=1268#bugnotes
>
> Use case is that an author wants a scene to be a certain size or aspect
> ratio.
>
> Related issue is whether initial screen size or aspect ratio is modifiable
> or not.
>
> Authors can control this using HTML parameters, if the X3D scene is
> included in an HTML page.
>
> Many browsers have command-line parameters that allow authors to control
> screen size and/or title bar. Example use case: kiosk mode for "museum"
> display.
>
> TODO: compare existing approach in X3D Layout Component. Perhaps a
> solution is already available in the X3D specification?
>
> * 36.4.1 Layout
>
> https://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/layout.html#Layout
>
> TODO: screen units? Layout shows how this can be defined.
>
> TODO: check SVG specification for comparison.
>
> Example:
>
> * http://doc.instantreality.org/documentation/nodetype/LocalWindow
> ======================================================================
>
> 6. Next week:
> - review C++ SAI proposal update, particularly timeline
> - PR8 review, PBR and SAI
>
> Future topics:
> - examine correspondences, gaps between HAnim and glTF skeleton.
> - buffered geometry and subsetting of glTF models.
> - Updating status spreadsheet of implementations
>    https://www.web3d.org/specifications/X3dNodeInventoryComparison.pdf
>    https://www.web3d.org/specifications/X3dNodeInventoryComparison.xslx
> - Blender export updates
> - X3DOM implementation of X3D Prototypes
> - X3D Security Considerations as part of X3D4 Specification
>
> Thanks for many many contributions from many many directions.  Have fun
> with X3D! 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
> http://faculty.nps.edu/brutzman
>
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>
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