<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle20
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:879822631;
mso-list-template-ids:757645650;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:.75in;
mso-level-number-position:left;
margin-left:.75in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:"Courier New";}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:1.25in;
mso-level-number-position:left;
margin-left:1.25in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:"Courier New";
mso-bidi-font-family:"Times New Roman";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:1.75in;
mso-level-number-position:left;
margin-left:1.75in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:2.25in;
mso-level-number-position:left;
margin-left:2.25in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:2.75in;
mso-level-number-position:left;
margin-left:2.75in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:3.25in;
mso-level-number-position:left;
margin-left:3.25in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:3.75in;
mso-level-number-position:left;
margin-left:3.75in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:4.25in;
mso-level-number-position:left;
margin-left:4.25in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:4.75in;
mso-level-number-position:left;
margin-left:4.75in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l1
{mso-list-id:922688003;
mso-list-type:hybrid;
mso-list-template-ids:-993482734 1709858626 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l1:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:.75in;
text-indent:-.25in;
font-family:Symbol;
mso-fareast-font-family:Calibri;
mso-bidi-font-family:"Times New Roman";}
@list l1:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:1.25in;
text-indent:-.25in;
font-family:"Courier New";}
@list l1:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:1.75in;
text-indent:-.25in;
font-family:Wingdings;}
@list l1:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:2.25in;
text-indent:-.25in;
font-family:Symbol;}
@list l1:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:2.75in;
text-indent:-.25in;
font-family:"Courier New";}
@list l1:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:3.25in;
text-indent:-.25in;
font-family:Wingdings;}
@list l1:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:3.75in;
text-indent:-.25in;
font-family:Symbol;}
@list l1:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:4.25in;
text-indent:-.25in;
font-family:"Courier New";}
@list l1:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:4.75in;
text-indent:-.25in;
font-family:Wingdings;}
@list l2
{mso-list-id:949094771;
mso-list-template-ids:1607250900;}
@list l2:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:.75in;
mso-level-number-position:left;
margin-left:.75in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l2:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:1.25in;
mso-level-number-position:left;
margin-left:1.25in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:"Courier New";
mso-bidi-font-family:"Times New Roman";}
@list l2:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:1.75in;
mso-level-number-position:left;
margin-left:1.75in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l2:level4
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:2.25in;
mso-level-number-position:left;
margin-left:2.25in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l2:level5
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:2.75in;
mso-level-number-position:left;
margin-left:2.75in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l2:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:3.25in;
mso-level-number-position:left;
margin-left:3.25in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l2:level7
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:3.75in;
mso-level-number-position:left;
margin-left:3.75in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l2:level8
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:4.25in;
mso-level-number-position:left;
margin-left:4.25in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l2:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:4.75in;
mso-level-number-position:left;
margin-left:4.75in;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l3
{mso-list-id:1255673377;
mso-list-template-ids:-2033701810;}
@list l3:level1
{mso-level-start-at:2;
mso-level-number-format:alpha-lower;
mso-level-tab-stop:.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l3:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:1.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l3:level3
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:1.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l3:level4
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:2.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l3:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:2.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l3:level6
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:3.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l3:level7
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:3.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l3:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:4.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l3:level9
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:4.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l4
{mso-list-id:1461148824;
mso-list-template-ids:-111656232;}
@list l4:level1
{mso-level-start-at:3;
mso-level-number-format:alpha-lower;
mso-level-tab-stop:.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l4:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:1.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l4:level3
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:1.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l4:level4
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:2.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l4:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:2.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l4:level6
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:3.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l4:level7
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:3.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l4:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:4.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l4:level9
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:4.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l5
{mso-list-id:1468282915;
mso-list-type:hybrid;
mso-list-template-ids:-1705766764 -1044885210 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l5:level1
{mso-level-start-at:9;
mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;
mso-fareast-font-family:Calibri;
mso-bidi-font-family:"Times New Roman";}
@list l5:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l5:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
@list l5:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;}
@list l5:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l5:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
@list l5:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;}
@list l5:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l5:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
@list l6
{mso-list-id:1564024085;
mso-list-template-ids:-980678806;}
@list l6:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:.5in;
mso-level-number-position:left;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l6:level2
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:1.0in;
mso-level-number-position:left;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l6:level3
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:1.5in;
mso-level-number-position:left;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l6:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:2.0in;
mso-level-number-position:left;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l6:level5
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:2.5in;
mso-level-number-position:left;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l6:level6
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:3.0in;
mso-level-number-position:left;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l6:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:3.5in;
mso-level-number-position:left;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l6:level8
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:4.0in;
mso-level-number-position:left;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l6:level9
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:4.5in;
mso-level-number-position:left;
text-indent:-.25in;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l7
{mso-list-id:1791630684;
mso-list-type:hybrid;
mso-list-template-ids:-369739426 67698703 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l7:level1
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l7:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l7:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l7:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l7:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l7:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l7:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l7:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l7:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l8
{mso-list-id:1863936383;
mso-list-template-ids:8580492;}
@list l8:level1
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l8:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:1.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l8:level3
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:1.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l8:level4
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:2.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l8:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:2.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l8:level6
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:3.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l8:level7
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:3.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l8:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:4.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l8:level9
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:4.5in;
mso-level-number-position:left;
text-indent:-.25in;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Hi Doug. Regarding WebAssembly, I think it fits as one of many many technologies available to Web authors, represented in the <i>X3D Application Stack – Layers and Alternatives</i> diagram in the row <i>Programming Libraries, Web authoring tools and 3D translators</i>.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:0in;mso-list:l5 level1 lfo9'>https://webassembly.org<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi John. glTF is a format for 3D models, and that is why you find multiple ways to use glTF2 as a 3D model in the X3D Specification. glTF itself is not suitable as any kind of format to provide an image texture.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><ol style='margin-top:0in' start=1 type=1><li class=MsoListParagraph style='margin-left:0in;mso-list:l7 level1 lfo5'><b>First: glTF models can be loaded via Inline<o:p></o:p></b></li></ol><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:.25in;mso-list:l1 level1 lfo6'>X3D Part 1: Architecture and base components, 9 Networking component, 9.4.2 Inline<o:p></o:p></li><li class=MsoListParagraph style='margin-left:.25in;mso-list:l1 level1 lfo6'>https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-DIS/Part01/components/networking.html#Inline<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'><i>The run-time system can support any number of 3D model resource types as long as those follow the abstract model definition (see 2.[RFC2077]), provide a registered content type ( e.g., model/x3d-xml, model/gltf-bin, model/stl, etc.), and can be determined with some form of content negotiation (see 2.[RFC2616]). The run-time system must support at least one X3D type ( e.g., model/x3d-xml) but can also support and negotiate any number of X3D encodings and (optionally) non-X3D representation formats. Support for loading glTF assets (see 2.[GLTF]) also requires support for Shape component level 2 and Lighting component level 4.<o:p></o:p></i></p><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:.25in;mso-list:l1 level1 lfo6'>Table 9.3 — Networking component support levels<o:p></o:p></li><li class=MsoListParagraph style='margin-left:.25in;mso-list:l1 level1 lfo6'>https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-DIS/Part01/components/networking.html#t-supportLevels<o:p></o:p></li><li class=MsoListParagraph style='margin-left:.25in;mso-list:l1 level1 lfo6'>Level 5, Model support<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in;background:white'><i><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'>Support for glTF models in Inline nodes, in .gltf (</span></i><i><span style='font-size:9.0pt;font-family:"Courier New";color:black'>model/gltf+json</span></i><i><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'>) and .glb (</span></i><i><span style='font-size:9.0pt;font-family:"Courier New";color:black'>model/gltf-binary</span></i><i><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'>) formats.<o:p></o:p></span></i></p><p class=MsoNormal style='margin-left:.5in;background:white'><i><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'>Requires support for Shape component level 2 and Lighting component level 3.<o:p></o:p></span></i></p><p class=MsoNormal style='margin-left:.5in;background:white'><i><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'>Minimum required glTF support:<o:p></o:p></span></i></p><ul style='margin-top:0in' type=circle><li class=MsoNormal style='color:black;margin-top:3.0pt;margin-left:.25in;mso-list:l0 level1 lfo8;background:white'><i><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>transformation hierarchy,<o:p></o:p></span></i></li><li class=MsoNormal style='color:black;margin-top:3.0pt;margin-left:.25in;mso-list:l0 level1 lfo8;background:white'><i><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>meshes,<o:p></o:p></span></i></li><li class=MsoNormal style='color:black;margin-top:3.0pt;margin-left:.25in;mso-list:l0 level1 lfo8;background:white'><i><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>physical materials,<o:p></o:p></span></i></li><li class=MsoNormal style='color:black;margin-top:3.0pt;margin-left:.25in;mso-list:l0 level1 lfo8;background:white'><i><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>loading of external binary data referenced from .gltf files ( e.g., for vertex coordinates).<o:p></o:p></span></i></li></ul><p class=MsoNormal><o:p> </o:p></p><ol style='margin-top:0in' start=2 type=1><li class=MsoListParagraph style='margin-left:0in;mso-list:l7 level1 lfo5'><b>Second: glTF2 rendering techniques are fully integrated into native X3D4 lighting and rendering models, thus encouraging compatible modeling and conversion of glTF models in X3D</b>.<o:p></o:p></li></ol><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>X3D Part 1: Architecture and base components, 12 Shape component, 12.4.6 PhysicalMaterial<o:p></o:p></li><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-DIS/Part01/components/shape.html#PhysicalMaterial<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'><i>The PhysicalMaterial node specifies surface material properties for associated geometry nodes. It indicates that a physical lighting model should be used for the computation. 17 Lighting component contains a detailed description of the X3D lighting model equations.<o:p></o:p></i></p><p class=MsoNormal style='margin-left:.5in'><i><o:p> </o:p></i></p><p class=MsoNormal style='margin-left:.5in'><i>Physical interpretation of the material parameters follows. These parameter descriptions closely follow the glTF specification (see [glTF]).<o:p></o:p></i></p><p class=MsoNormal style='margin-left:.5in'><i><o:p> </o:p></i></p><p class=MsoNormal style='margin-left:.5in'><i>NOTE The physical material properties of X3D are also deliberately consistent with the glTF 2.0 material definition. Effectively, converting (in either direction) between X3D PhysicalMaterial and glTF 2.0 material definitions is equivalent.<o:p></o:p></i></p><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>also 12.4.10 UnlitMaterial<o:p></o:p></li><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-DIS/Part01/components/shape.html#UnlitMaterial<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Also please be aware that we are not pursuing a specific design for SvgTexture or related new-node possibilities at this time. Rather we are performing our “final final” review of X3D4 issues in Mantis. Thaat issue asks whether SVG ought to be included among allowed url file types for ImageTexture. Currently the rationale appears to be no, continuing comment welcome. The X3D Working Group will finalize resolution of Web3D Consortium comments on X3D4 Draft International Standard Ballot on Friday October 7.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>Mantis 1400: add Scalable Vector Graphics (SVG) to recommended image formats for ImageTexture<o:p></o:p></li><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>https://www.web3d.org/member-only/mantis/view.php?id=1400<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>More documentation about glTF and X3D correspondences is found in recent spreadsheet-comparison efforts by X3D Working Group. I have moved both of these documents from other locations into our central Web3D sourceforge repository.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>X3D Application Stack - Layers and Alternatives<o:p></o:p></li><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>https://www.web3d.org/specifications/X3dApplicationStackLayersAlternatives.png<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>Features Comparison X3D4 glTF2 spreadsheet<o:p></o:p></li><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>https://www.web3d.org/specifications/FeaturesComparisonX3D4glTF2.pdf<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>and now highlighted at<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>X3D Specifications: Schema and DOCTYPE Validation<o:p></o:p></li><li class=MsoListParagraph style='margin-left:.25in;mso-list:l2 level1 lfo7'>https://www.web3d.org/specifications<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Ongoing scrutiny and insights are always welcome. Have fun building X3D Applications! 8)<o:p></o:p></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>all the best, Don<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>-- <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Don Brutzman Naval Postgraduate School, Code USW/Br brutzman@nps.edu<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Watkins 270, MOVES Institute, Monterey CA 93943-5000 USA +1.831.656.2149<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>X3D graphics, virtual worlds, Navy robotics https://</span> <span style='font-size:10.0pt;font-family:"Courier New"'>faculty.nps.edu/brutzman<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> John Carlson <yottzumm@gmail.com> <br><b>Sent:</b> Saturday, September 24, 2022 8:41 AM<br><b>To:</b> Brutzman, Donald (Don) (CIV) <brutzman@nps.edu><br><b>Subject:</b> Re: [x3d-public] X3D Working Group meeting 23 SEP 2022: Mantis issues review, SvgTexture<o:p></o:p></p></div></div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p><p class=MsoNormal>Perhaps we should generalize to GraphicsTexture and include glTF in the FULL profile, and SVG in a simpler profile.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>At this point, it seems like Inline would be a required child of GraphicsTexture, with animation, encoding and navigation options.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I realize I should be checking the ticket and standard.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Yes, I recognize “portals” from Squeak here. Seeing into another scene. I think Anchors are okay here. There’s no HTML5 within HTML5, so there’s no precedent.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>John<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Sat, Sep 24, 2022 at 9:55 AM Brutzman, Donald (Don) (CIV) <<a href="mailto:brutzman@nps.edu">brutzman@nps.edu</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>John, there is a bit more in the issue and the references.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>SVG produces animatable interactive 2D images through vector graphics. So it has characteristics of both ImageTexture and MovieTexture (and interpolators and scriptable event models).<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Dick’s point yesterday was that implementing such a combination is different and bigger than ImageTexture or MovieTexture. The ways that an author might use an SVG model are similar, but when you think of how a browser might do it and then add computation, user interaction, security, etc. etc. then the design perspective is quite different. This leads us to the tried-and-true approach of implementing and testing further, most likely as a new node.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>So I think that is an interesting and important justification that he made. We offer it back to the group for review and discussion – thanks for your points.<o:p></o:p></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>all the best, Don</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>-- </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Don Brutzman Naval Postgraduate School, Code USW/Br <a href="mailto:brutzman@nps.edu" target="_blank">brutzman@nps.edu</a></span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Watkins 270, MOVES Institute, Monterey CA 93943-5000 USA +1.831.656.2149</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>X3D graphics, virtual worlds, Navy robotics https://</span> <span style='font-size:10.0pt;font-family:"Courier New"'><a href="http://faculty.nps.edu/brutzman" target="_blank">faculty.nps.edu/brutzman</a></span><o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>From:</b> John Carlson <<a href="mailto:yottzumm@gmail.com" target="_blank">yottzumm@gmail.com</a>> <br><b>Sent:</b> Friday, September 23, 2022 5:33 PM<br><b>To:</b> Brutzman, Donald (Don) (CIV) <<a href="mailto:brutzman@nps.edu" target="_blank">brutzman@nps.edu</a>><br><b>Cc:</b> X3D Public Mailing List (<a href="mailto:x3d-public@web3d.org" target="_blank">x3d-public@web3d.org</a>) <<a href="mailto:x3d-public@web3d.org" target="_blank">x3d-public@web3d.org</a>><br><b>Subject:</b> Re: [x3d-public] X3D Working Group meeting 23 SEP 2022: Mantis issues review, ballot deadlines, X3D Application Stack Layer Examples diagram<o:p></o:p></p></div></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Recommendation: SvgTexture should be a single frame MovieTexture for now, with possible extensions to animation with ROUTEs and ECMAscript, if animation is enabled on SvgTexture node. I don’t know if MovieTexture enables/disables animation, but my guess is, yes.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Disabling/enabling animation of SVGs should be in more inclusive profiles.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Is that simple enough?<o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Fri, Sep 23, 2022 at 7:23 PM John Carlson <<a href="mailto:yottzumm@gmail.com" target="_blank">yottzumm@gmail.com</a>> wrote:<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Consider: SVG is a manipulation language for inserting 2D graphics into a scene. Definition languages are more closely related to schemas, or possibly for manipulating schema. After insertion into a scene, ECMAscript is typically used for manipulation. ROUTEs should be allowed to as well.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>SVGs should be considered animations with popular packages being D3.js.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Otherwise, SVG is a declarative language, similar to X3D and HTML. Last I heard, there was no official schema for SVG.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>If the SVG is animated by ECMAscript, wouldn’t it more properly be used to texture surfaces and volumes with a MovieTexture? Are MovieTextures 2D or 3D? What textures are used for VolumeRendering?<o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Fri, Sep 23, 2022 at 1:44 PM Brutzman, Donald (Don) (CIV) <<a href="mailto:brutzman@nps.edu" target="_blank">brutzman@nps.edu</a>> wrote:<o:p></o:p></p></div><div><div><div style='border:none;border-bottom:solid windowtext 1.5pt;padding:0in 0in 1.0pt 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Attendees: Dick Puk, Don Brutzman<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>1. We first reviewed the two recently posted Mantis issues regarding SVG and QIF. We also looked at a Mantis issue posted earlier this year relating to scalable composition of really large X3D worlds. Selected details follow.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><ol start=1 type=a><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l8 level1 lfo1'>Mantis <span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#F3F3F3'>1400: add Scalable Vector Graphics (SVG) to recommended image formats for ImageTexture</span><o:p></o:p></li></ol><p><a href="https://www.web3d.org/member-only/mantis/view.php?id=1400" target="_blank">https://www.web3d.org/member-only/mantis/view.php?id=1400</a><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#F3F3F3'>SVG references:</span><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'><br clear=all><br clear=all><span style='background:#F3F3F3'>* </span></span><a href="https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FGraphics%2FSVG&data=05%7C01%7Cbrutzman%40nps.edu%7C7c27ac4352b6456bb4e608da9e4342ff%7C6d936231a51740ea9199f7578963378e%7C0%7C0%7C637996309118717649%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=dNTi45a4RbClRy%2BDcu%2FoOyK7q7frspnDsqk8UU1QaGQ%3D&reserved=0" target="_blank"><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:royalblue;text-decoration:none'>https://www.w3.org/Graphics/SVG</span></a><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'><br clear=all><span style='background:#F3F3F3'>* "SVG is a markup language for describing two-dimensional graphics applications and images, and a set of related graphics script interfaces."</span><br clear=all><br clear=all><span style='background:#F3F3F3'>Dick estimation: thinks SVG is a 2D scene-graph definition language. It can result as an image, though so can X3D.</span><br clear=all><br clear=all><span style='background:#F3F3F3'>This issue suggests that SVG be listed as a recommended (optional) format that can be rendered as an ImageTexture, using the default presentation settings of the SVG model.</span><br clear=all><br clear=all><span style='background:#F3F3F3'>Of note is that browsers are not forbidden from implementing SVG as an ImageTexture format, and also that SVG-to-PNG converters are commonplace.</span><br clear=all><br clear=all><span style='background:#F3F3F3'>Of further note is that the DPS minutes already showed a use case for SVG as ImageTexture, namely conversion of metadata information as a carefully laid-out annotation image that is billboarded in context. Having direct SVG rendering would eliminate the offscreen conversion step, permitting direct integration of X3D models with other HTML/SVG web graphics.</span><br clear=all><br clear=all><span style='background:#F3F3F3'>Concern: don't want to overcomplicate the existing ImageTexture functionality as a 2D array of pixels. Once generation of pixels becomes a computational process, this is different functionality for the ImageTexture node. This might raise further concerns about impact of ImageTexture computational complexity in various profiles (such as Interchange Profile).</span><br clear=all><br clear=all><span style='background:#F3F3F3'>Possible alternate: define SvgTexture node? What fields would it have?</span><br clear=all style='font-variant-ligatures:normal;font-variant-caps:normal;text-decoration-style:initial;text-decoration-color:initial;word-spacing:0px'></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#F3F3F3'>Suggested possible resolution:</span><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'><br clear=all><br clear=all><span style='background:#F3F3F3'>a. Browsers are welcome to implement ImageTexture as an allowed url format if they see fit,</span><br clear=all><span style='background:#F3F3F3'>b. SvgTexture ought to be designed and considered as a possible new node,</span><br clear=all><span style='background:#F3F3F3'>c. ComposedImageTexture (or somesuch) might be designed and considered as an even-more general possibility for comuputational 2D imagery,</span><br clear=all><span style='background:#F3F3F3'>d. Following further practical experience, defer any specification-change recommendations to future X3D4.1.</span></span><o:p></o:p></p><div style='border:none;border-bottom:solid windowtext 1.5pt;padding:0in 0in 1.0pt 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#F3F3F3'> </span><o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><ol start=2 type=a><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level1 lfo2'>Mantis <span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#F3F3F3'>1401: aligning X3D4 LineProperties with Quality Information Framework (QIF) specification</span><o:p></o:p></li></ol><p><a href="https://www.web3d.org/member-only/mantis/view.php?id=1401" target="_blank">https://www.web3d.org/member-only/mantis/view.php?id=1401</a><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#F3F3F3'>Suggested resolution:</span><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'><br clear=all><br clear=all><span style='background:#F3F3F3'>a. The concepts are directly aligned and overlapping, with some additions by QIF.</span><br clear=all><span style='background:#F3F3F3'>b. This ISO standard does not appear to have been considered by SC24 or JTC1.</span><br clear=all><span style='background:#F3F3F3'>c. Close scrutiny of both terms and definitions needs to be performed before any changes might be recommended.</span><br clear=all><span style='background:#F3F3F3'>d. If changes are indeed warranted and acceptable, then they likely need to first considered as part of the Registry of Items, specifically entries for linestyle and hatchstyle.</span><br clear=all><span style='background:#F3F3F3'>e. At that point, amendment of X3D to stay aligned with Registry of Items (or possibly add further styles independently) can be considered.</span><br clear=all><span style='background:#F3F3F3'>f. Defer to X3D 4.1.</span><br clear=all><br clear=all><span style='background:#F3F3F3'>Meanwhile note in Web3D current ballot comments the need to fix the table erratum previously noted.</span></span><o:p></o:p></p><div style='border:none;border-bottom:solid windowtext 1.5pt;padding:0in 0in 1.0pt 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><ol start=3 type=a><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l4 level1 lfo3'>Mantis <span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#F3F3F3'>1192: 07.2.2 Bindable children nodes - Undefined results if bindable node is under Switch or LOD is problematic</span><o:p></o:p></li></ol><p><a href="https://www.web3d.org/member-only/mantis/view.php?id=1192#bugnotes" target="_blank">https://www.web3d.org/member-only/mantis/view.php?id=1192#bugnotes</a><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div style='border:none;border-bottom:solid windowtext 1.5pt;padding:0in 0in 1.0pt 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#EBEBEB'>Comment on 19775-1: Abstract X3D Definitions - V3.3</span><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'><br clear=all><span style='background:#EBEBEB'>7.2.2 Bindable children nodes</span><br clear=all></span><a href="http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/core.html#BindableChildrenNodes" target="_blank"><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:royalblue;background:#EBEBEB;text-decoration:none'>http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/core.html#BindableChildrenNodes</span></a><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'><br clear=all><br clear=all><span style='background:#EBEBEB'>-----------------</span><br clear=all><span style='background:#EBEBEB'>Subject: Undefined results if bindable node is under Switch or LOD is problematic</span><br clear=all><br clear=all><span style='background:#EBEBEB'>Spec sayeth:</span><br clear=all><span style='background:#EBEBEB'>"The results are undefined if a bindable node is bound and is the child of an LOD, Switch, or any node or prototype that disables its children."</span><br clear=all><br clear=all><span style='background:#EBEBEB'>This leads to all manner of inconsistent problems among scenes. It also means that Inline node (which may or may not include bindable nodes) has undefined behavior under LOD/Switch/etc.</span><br clear=all><br clear=all><span style='background:#EBEBEB'>As a result, in addition to indeterminate X3D browser behavior, it means that X3D scenes are not fully composable. That is contrary to X3D design objectives.</span><br clear=all><br clear=all><span style='background:#EBEBEB'>Different prose and deterministic guidelines is needed in this section that provides clear rules for binding/unbinding nodes when they become active within LOD/Switch/etc. Small adaptations to current binding rules can likely address this problem satisfactorily.</span><br clear=all><br clear=all><span style='background:#EBEBEB'>Related: Mantis issue 749</span></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#EBEBEB'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#EBEBEB'>April 29:</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#F3F3F3'>Analysis during X3D Working Group call:</span><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'><br clear=all><br clear=all><span style='background:#F3F3F3'>a. Switch would keep each binding stack aligned with whichever child was active, thereby binding and unbinding nodes whenever the Switch level is modified.</span><br clear=all><br clear=all><span style='background:#F3F3F3'>b. LOD would have all of its child bindable nodes on the binding stack throughout, so that user experience was consistent. For example, it would make no sense for Viewpoints to get arbitrarily unbound and bound, based on range to viewer, as a user independently navigated through a scene.</span><br clear=all><br clear=all><span style='background:#F3F3F3'>c. LOD attempting to maintain author intent has access to all Viewpoint nodes on binding stack, and range-to-viewer LOD transitions are either flexible suggestions (browser-optimization control) or rigidly enforced (forceTransitions field is TRUE). Thus if a node is subsequently bound by user in a different inactive LOD child branch, then that binding event is honored and that LOD child branch becomes the active child branch. This binding event (and changed LOD child branch selection) takes precedence over browser range/performance considerations, and also takes precedence over whatever value is provided in forceTransitions field. (Example: selecting a room Viewpoint while in a large building model).</span><br clear=all><br clear=all><span style='background:#F3F3F3'>d. NavigationInfo, Background and Fog binding stacks and responses to binding events should behave identically to Viewpoint. Variations would be exceedingly complex and not understandable. Consistency means that author intent and user action always take precedence, for Switch and LOD response.</span><br clear=all><br clear=all><span style='background:#F3F3F3'>Spec editors work on integrating these principles as specification prose (we are close already) and report back recommended changes to X3D working group.</span><br clear=all><br clear=all><span style='background:#F3F3F3'>Don's opinion: this will significantly help user-sensible scalability of huge (perhaps Metaverse-scale) models using many Inline and prototype nodes, enabling predictable and performant navigation and traversal throughout.</span></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#EBEBEB'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#EBEBEB'>Today’s session.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#EBEBEB'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:#F3F3F3'>Alternatives deserving working-review consensus:</span><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'><br clear=all><br clear=all><span style='background:#F3F3F3'>a. Recommending this clarification of undefined prior specification prose might add important value, or might be construed as a technical change to X3D4.0 that possibly requires future re-balloting as another X3D 4.0 DIS (which is not an acceptable outcome).</span><br clear=all><br clear=all><span style='background:#F3F3F3'>b. If not balloted then this becomes an X3D4.1 issue.</span><br clear=all><br clear=all><span style='background:#F3F3F3'>c. Web3D might consider some alternative approach to strongly encourage adoption of this clarified approach in order to further encourage greater scalability of multi-world environments, and better alignment with shared Metaverse design imperatives. For example, are we creating a Best Practices Pending X3D 4.1 Approval document of some sort?</span></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>2. We only have 4 total issues to review as planned Web3D comments. This will occur during a single working-group meeting, 7 OCT.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Deadline for X3D Ballot comments:<o:p></o:p></p><ul type=disc><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l6 level1 lfo4'>OCT, Web3D comments to INCITS (U.S. National Standards Body<o:p></o:p></li><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l6 level1 lfo4'>TBD OCT, INCITS comments to SC24<o:p></o:p></li><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l6 level1 lfo4'>4 NOV, SC24 comments to ISO<o:p></o:p></li></ul><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>No meeting currently planned for 30 SEP.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>3. Bonus round: we worked on the “layer” diagram from recent meetings a bit more. Latest X3dApplicationStackLayerExamples is attached, all comments welcome.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Have fun with X3D!<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New"'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New"'>all the best, Don</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New"'>-- </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New"'>Don Brutzman Naval Postgraduate School, Code USW/Br <a href="mailto:brutzman@nps.edu" target="_blank">brutzman@nps.edu</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New"'>Watkins 270, MOVES Institute, Monterey CA 93943-5000 USA +1.831.656.2149</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New"'>X3D graphics, virtual worlds, Navy robotics https://</span> <span style='font-size:10.0pt;font-family:"Courier New"'><a href="http://faculty.nps.edu/brutzman" target="_blank">faculty.nps.edu/brutzman</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>_______________________________________________<br>x3d-public mailing list<br><a href="mailto:x3d-public@web3d.org" target="_blank">x3d-public@web3d.org</a><br><a href="http://web3d.org/mailman/listinfo/x3d-public_web3d.org" target="_blank">http://web3d.org/mailman/listinfo/x3d-public_web3d.org</a><o:p></o:p></p></div></body></html>