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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><b>Minutes of the X3D WG meeting held on Wednesday 25<sup>th</sup> October 2017 - Public Release<o:p></o:p></b></p><p class=MsoNormal><b><o:p> </o:p></b></p><p class=MsoNormal>Attendees: Roy Walmsley, Leonard Daly, Dick Puk, Don Brutzman, Anita Havele<o:p></o:p></p><p class=MsoNormal>Apologies received: Vince Marchetti (late arrival)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>=======================================================================================================<o:p></o:p></p><p class=MsoNormal>A. <b><u>Outstanding matters</u></b><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> None.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>=======================================================================================================<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>B. <b><u>Summary and Technical reports</u></b><o:p></o:p></p><p class=MsoNormal style='margin-left:36.0pt'>Opportunity for anyone to make a short report on Web site, marketing, communication, specification or technical matters that is not already on the Agenda.<o:p></o:p></p><p class=MsoNormal style='margin-left:36.0pt'><o:p> </o:p></p><ol style='margin-top:0cm' start=1 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l2 level1 lfo1'><u>Report on Mantis SG meeting held Thursday 19<sup>th</sup> October 2017<o:p></o:p></u></li></ol><p class=MsoNormal style='margin-left:54.0pt'>Reference: <a href="http://web3d.org/mailman/private/x3d_web3d.org/2017-October/006452.html">http://web3d.org/mailman/private/x3d_web3d.org/2017-October/006452.html</a><o:p></o:p></p><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:54.0pt'>Roy reported that fourteen older Mantis issues with the status still on New were triaged. After review, ten were agreed to be implemented and the status updated to Assigned, one was agreed to need information from the DPS group and the status updated to feedback, and one was agreed to need more discussion and the status was updated to acknowledged. For the other two it was agreed that no changes were required, so the issue statuses were updated to Resolved, with a resolution of “no change required”.<o:p></o:p></p><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><ol style='margin-top:0cm' start=2 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l2 level1 lfo1'><u>Report on Mantis SG meeting held Monday 23<sup>rd</sup> October 2017<o:p></o:p></u></li></ol><p class=MsoNormal style='margin-left:54.0pt'>Roy reported that there was discussion of the SAI, the language bindings, X3DJSAIL, and the Object Model, following the series of four postings on “Building an X3D Object Model”. Greater understanding was achieved, although no decisions were taken. Next steps will involve looking at some illustrative examples.<o:p></o:p></p><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:54.0pt'>All five new Mantis issues raised from specification comments submitted last week were triaged. Three issues needed more discussion, and their statuses were updated to Acknowledged, one issue was agreed and the status updated to Assigned, and the other issue, which needed more information, had the status updated to feedback. While discussing these issues there was also some review of the specification comment workflow handling processes, and recognition that some improvements could be made.<o:p></o:p></p><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><ol style='margin-top:0cm' start=3 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l2 level1 lfo1'><u>Report on H-Anim V2.0 CD2 standards progress<o:p></o:p></u></li></ol><p class=MsoNormal style='margin-left:54.0pt'>Meeting with Myeong Won Lee<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-left:54.0pt'>Roy reported that he had a good discussion with Myeong Won Lee on Monday, it being impractical for him to attend the H-Anim WG meetings. The comments that Myeong Won was concerned about were discussed. Some comments were no longer applicable, as the text had already been changed. Others were reviewed and agreed.<o:p></o:p></p><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><ol style='margin-top:0cm' start=4 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l2 level1 lfo1'><u>Comment on rigid body physics examples by Paul Masson.<o:p></o:p></u></li></ol><p class=MsoNormal style='margin-left:54.0pt'>Don reported that he had added a warning to the example archive, following receipt of a comment by Paul Masson expressing concern that the rigid body physics examples did not appear to work.<o:p></o:p></p><p class=MsoNormal style='margin-left:54.0pt'><u><o:p><span style='text-decoration:none'> </span></o:p></u></p><ol style='margin-top:0cm' start=5 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l2 level1 lfo1'><u>Lots of feedback from John. Include USE nodes and comments. Affects JSON schema<o:p></o:p></u></li></ol><p class=MsoNormal style='margin-left:54.0pt'>Don reported that John Carlson has provided a large quantity of feedback on topics related to the Object Model and JSON, among other things. These have included observations on being able to add comments to a node that has a USE attribute. This is important for the JSON language binding and schema, where we are developing the JSON schema validate more strictly the use of the “USE” attribute.<o:p></o:p></p><p class=MsoNormal style='margin-left:54.0pt'><u><o:p><span style='text-decoration:none'> </span></o:p></u></p><ol style='margin-top:0cm' start=6 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l2 level1 lfo1'><u>Tools and converters<o:p></o:p></u></li></ol><p class=MsoListParagraph style='margin-left:54.0pt'>Don reported that there is significant momentum building up on tools and converters. The STEP converter developed by Vince is providing significant impetus.<o:p></o:p></p><p class=MsoListParagraph style='margin-left:54.0pt'><o:p> </o:p></p><ol style='margin-top:0cm' start=7 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l2 level1 lfo1'><u>Extrusion, triangle and other geometry nodes.<o:p></o:p></u></li></ol><p class=MsoListParagraph style='margin-left:54.0pt'>Don reported that there are very few warnings on degenerate geometry in the standards. He will follow up with specification comments.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>=======================================================================================================<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><u>C. Discussion Topics<o:p></o:p></u></b></p><p class=MsoListParagraph style='margin-left:90.0pt'><o:p> </o:p></p><ol style='margin-top:0cm' start=1 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l1 level1 lfo2'><u>Physically based rendering<o:p></o:p></u></li></ol><p class=MsoListParagraph style='margin-left:54.0pt'>Where are we now? Where do we want to go? What are our next steps?<o:p></o:p></p><p class=MsoListParagraph style='margin-left:54.0pt'><o:p> </o:p></p><p class=MsoListParagraph style='margin-left:54.0pt'>The topic opened with clarification of the term “Physically based rendering”, explaining that this is about advanced rendering. The Wikipedia page at <a href="https://en.wikipedia.org/wiki/Physically_based_rendering">https://en.wikipedia.org/wiki/Physically_based_rendering</a> provides a brief summary of this topic.<o:p></o:p></p><p class=MsoListParagraph style='margin-left:54.0pt'><o:p> </o:p></p><p class=MsoListParagraph style='margin-left:54.0pt'>Dick reported that he was aware of a presentation on a “Material Definition Language” that was well attended. This was quickly established to be an NVIDIA technology, with a web page at <a href="https://www.nvidia.com/en-us/design-visualization/technologies/material-definition-language/">https://www.nvidia.com/en-us/design-visualization/technologies/material-definition-language/</a>. NVIDIA have published a specification for the Material Definition Language (MDL) at<o:p></o:p></p><p class=MsoListParagraph style='margin-left:54.0pt'><a href="http://developer2.download.nvidia.com/designworks/mdl-sdk/secure/MDL_spec_1.3.2_16Sep2016.pdf?IwBvSZJ1tt3uBNnh-zSurGW9WvkA4UHCEp1aBBLhL8CyMw2bkls1o6JbAv9EIzseX7yqXxCNXlFS9WIGrCk6H9nwQ359kfvODtyPQ3pDTx9lS3nXuTUSF9WYZAsFsplGScZAhQ8VGMqRtngj8Wsr1BGtTttaWw">http://developer2.download.nvidia.com/designworks/mdl-sdk/secure/MDL_spec_1.3.2_16Sep2016.pdf?IwBvSZJ1tt3uBNnh-zSurGW9WvkA4UHCEp1aBBLhL8CyMw2bkls1o6JbAv9EIzseX7yqXxCNXlFS9WIGrCk6H9nwQ359kfvODtyPQ3pDTx9lS3nXuTUSF9WYZAsFsplGScZAhQ8VGMqRtngj8Wsr1BGtTttaWw</a>. In addition an<o:p></o:p></p><p class=MsoListParagraph style='margin-left:54.0pt'>MDL handbook was available at <a href="http://www.mdlhandbook.com/">http://www.mdlhandbook.com/</a>.<o:p></o:p></p><p class=MsoListParagraph style='margin-left:54.0pt'><o:p> </o:p></p><p class=MsoListParagraph style='margin-left:54.0pt'>It was agreed that we would allow time for everyone to review this material, and then discuss it further at another meeting.<o:p></o:p></p><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><ol style='margin-top:0cm' start=2 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l1 level1 lfo2'><u>Incorporation of Leonard’s comments into glTF/X3D features spreadsheet<o:p></o:p></u></li></ol><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:54.0pt'>This document was reviewed and updated in place based on the comments submitted by Leonard. The first 11 of Leonards comments were worked through, leaving seven for a subsequent discussion. A snapshot of the document as updated is attached to these minutes.<o:p></o:p></p><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><ol style='margin-top:0cm' start=3 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l1 level1 lfo2'><u>Review of Korea Chapter Meeting presentation at Siggraph 2017 – MAR Updates<o:p></o:p></u></li></ol><p class=MsoNormal style='margin-left:54.0pt'><span class=file><a href="http://www.web3d.org/sites/default/files/page/Korea%20Chapter%20Meeting%20SIGGRAPH%202017/1_wg9-activities-overview-and-MAR-RM-2017.pdf" title="1_wg9-activities-overview-and-MAR-RM-2017.pdf">Mixed and Augmented Reality (MAR) Updates, ISO/IEC SC24 Working Group 9 by convener Dr. Gerry Kim, Korea University</a><o:p></o:p></span></p><p class=MsoNormal style='margin-left:54.0pt'><span class=file><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:54.0pt'><span class=file>Not discussed.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><p class=MsoNormal>=======================================================================================================<o:p></o:p></p><p class=MsoListParagraph><u><o:p><span style='text-decoration:none'> </span></o:p></u></p><p class=MsoNormal>D. <b><u>Specification work, GitHub, and Mantis issues<o:p></o:p></u></b></p><p class=MsoNormal><b><u><o:p><span style='text-decoration:none'> </span></o:p></u></b></p><ol style='margin-top:0cm' start=1 type=1><li class=MsoNormal style='margin-left:18.0pt;mso-list:l0 level1 lfo3'><u>Mantis issue 1151 : 19775-1, 9.4.2 Inline - Inline is silent about head, component, unit, and meta statements<o:p></o:p></u></li></ol><p class=MsoNormal style='margin-left:54.0pt'>Reference: <u><a href="http://www.web3d.org/member-only/mantis/view.php?id=1151">http://www.web3d.org/member-only/mantis/view.php?id=1151</a><o:p></o:p></u></p><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:54.0pt'><span class=file>Not discussed.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:54.0pt'><o:p> </o:p></p><p class=MsoNormal>=======================================================================================================<o:p></o:p></p><p class=MsoNormal style='margin-left:54.0pt'><u><o:p><span style='text-decoration:none'> </span></o:p></u></p><p class=MsoNormal>E. <b><u>Schedule review<o:p></o:p></u></b></p><p class=MsoNormal><b><u><o:p><span style='text-decoration:none'> </span></o:p></u></b></p><p class=MsoNormal>Other topics for discussion not yet assigned are:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-indent:36.0pt'>Investigate CSS with respect to 3D display capabilities.<o:p></o:p></p><p class=MsoNormal style='text-indent:36.0pt'><o:p> </o:p></p><p class=MsoNormal>Note: Daylight saving time ends for the UK and Europe on Sunday 29<sup>th</sup> October, therefore the meeting on November 1<sup>st</sup> will be one hour earlier for Europeans.<o:p></o:p></p><p class=MsoNormal>November 1<sup>st</sup> – C/C++/C# Language Bindings Review<o:p></o:p></p><p class=MsoNormal>Note: Daylight saving time ends for US on Sunday 5<sup>th</sup> November, so the meeting times will revert back to normal for Europeans.<o:p></o:p></p><p class=MsoNormal>November 8<sup>th</sup> –<o:p></o:p></p><p class=MsoNormal>November 15<sup>th</sup> – <o:p></o:p></p><p class=MsoNormal>November 22<sup>nd</sup> –<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>=======================================================================================================<o:p></o:p></p><p class=MsoNormal><b><o:p> </o:p></b></p><p class=MsoNormal>Roy Walmsley<o:p></o:p></p><p class=MsoNormal>X3D WG co-chair<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>