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<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Following through on prior email discussion, here is summary of specification editors' review:</div>
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<div class="elementToProof">These changes are considered to be consistent with X3D 4.0, merely addition of identical upVector field with adjustment of default values and clarified prose.<br>
<br>
This correction does no harm to existing X3D 4.0 content or players, and deserves to be a current recommended practice now. These changes can be considered errata in X3D 4.0 deserving correction in content and validation tools. Other changes in Mantis 1255
are deferred to X3D 4.1.</div>
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Changes have been applied satisfactorily: X3D 4.0 DTD, Schema, X3DUOM, Tooltips, and X3DJSAIL Java library. All relevant tools updated, following successful completion of test suites.</div>
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<div class="elementToProof">X3D Specifications: Schema and DOCTYPE Validation</div>
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<div class="elementToProof">https://www.web3d.org/specifications</div>
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</div>
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<div class="elementToProof">X3D XML Schema <a href="https://www.web3d.org/specifications/x3d-4.0.xsd" target="_blank" id="OWA7dd7d594-8b6e-200f-9069-1f38f62c00d5" class="OWAAutoLink">
x3d-4.0.xsd</a> and <a href="https://www.web3d.org/specifications/X3dSchemaDocumentation4.0.html" target="_blank" id="OWA8ffc842e-dfa4-5fb0-cb32-44a36b38f353" class="OWAAutoLink">
documentation</a></div>
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<div class="elementToProof">https://www.web3d.org/specifications/X3dSchemaDocumentation4.0/x3d-4.0_TextureProjector.html</div>
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<div class="elementToProof" style="margin: 0px;">Https://www.web3d.org/specifications/X3dSchemaDocumentation4.0/x3d-4.0_TextureProjectorParallel.html </div>
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<div class="elementToProof">XML DOCTYPE <a href="https://www.web3d.org/specifications/x3d-4.0.dtd" target="_blank" id="OWA7c8a31aa-e3b0-24ae-e9b3-31ab3af8eda8" class="OWAAutoLink">
x3d-4.0.dtd</a> and <a href="https://www.web3d.org/specifications/X3dDoctypeDocumentation4.0.html" target="_blank" id="OWA5bda3a04-7db4-a399-4e55-308081922458" class="OWAAutoLink">
documentation</a></div>
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<div class="elementToProof">https://www.web3d.org/specifications/X3dDoctypeDocumentation4.0.html#TextureProjector</div>
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<div class="elementToProof">https://www.web3d.org/specifications/X3dDoctypeDocumentation4.0.html#TextureProjectorParallel</div>
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</div>
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<div class="elementToProof">X3D Unified Object Model (X3DUOM)</div>
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<div class="elementToProof">The X3D Unified Object Model (X3DUOM) is a full set of object-oriented interfaces for all nodes, fields and statements in the X3D Architecture Specification. </div>
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<div class="elementToProof">https://www.web3d.org/specifications/X3DUOM.html</div>
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<div class="elementToProof">https://www.web3d.org/specifications/X3dUnifiedObjectModel-4.0.xml</div>
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</div>
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<div class="elementToProof">X3D Tooltips: TextureProjector and TextureProjectorParallel</div>
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<div class="elementToProof">https://www.web3d.org/x3d/tooltips/X3dTooltips.html#TextureProjector</div>
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<div class="elementToProof">https://www.web3d.org/x3d/tooltips/X3dTooltips.html#TextureProjectorParallel</div>
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Prose and figures updated in X3D 4.1 Committee Draft, with changes shown in color-coded markup</div>
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<div class="elementToProof">X3D 4.1 Architecture, committee draft (CD)</div>
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<div class="elementToProof">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD</div>
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<div class="elementToProof">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/components/textureProjection.html#TextureProjector</div>
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<div class="elementToProof">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Images/ptmperspective2.png</div>
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<div class="_Entity _EType_OWALinkPreview _EId_OWALinkPreview_1 _EReadonly_0"><span> </span><img style="max-width: 100%;" id="image_0" src="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Images/ptmperspective2.png"></div>
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<br>
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<div class="elementToProof"><a href="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Images/ptmparallel2.png" id="LPlnk" class="OWAAutoLink">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Images/ptmparallel2.png</a></div>
<div class="_Entity _EType_OWALinkPreview _EId_OWALinkPreview_4 _EReadonly_0"><img style="max-width: 100%;" src="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Images/ptmparallel2.png"></div>
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Also tested satisfactorily for X3DPSAIL Python library, available in version control. (Am not yet releasing x3d.py on py.py until some other new features are ready.)</div>
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<div class="elementToProof">Python X3D Package x3d.py, </div>
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<div>X3D Python Scene Access Interface Library (X3DPSAIL) </div>
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<div class="elementToProof">https://www.web3d.org/x3d/stylesheets/python/python.html</div>
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<div class="elementToProof">https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/stylesheets/python/</div>
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<div class="elementToProof">https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/stylesheets/python/x3d.py</div>
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All rationales and changes are documented in the Mantis Issue Tracker, which is available to Web3D Consortium members.</div>
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<div class="elementToProof">Mantis 1481: upVector field for TextureProjector, TextureProjectorParallel nodes</div>
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<div class="elementToProof">https://mantis.web3d.org/view.php?id=1481#c3721</div>
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<div class="elementToProof">Snapshot attached</div>
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Continuing implementation efforts to ensure this feature is fully deployed for X3D content is much appreciated.</div>
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<br>
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Have fun with X3D! 🙂</div>
<div id="Signature" class="elementToProof">
<p style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"><span style="font-family: "Courier New"; font-size: 9pt;"><br>
</span></p>
<p style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"><span style="font-family: "Courier New"; font-size: 9pt;">all the best, Don</span></p>
<p style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"><span style="font-family: "Courier New"; font-size: 9pt;">--</span></p>
<p style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"><span style="font-family: "Courier New"; font-size: 9pt;">Don Brutzman Naval Postgraduate School, Code USW/Br brutzman@nps.edu</span></p>
<p style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"><span style="font-family: "Courier New"; font-size: 9pt;">Watkins 270, MOVES Institute, Monterey CA 93943-5000 USA +1.831.656.2149</span></p>
<p style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"><span style="font-family: "Courier New"; font-size: 9pt;">X3D graphics, virtual worlds, navy robotics https://faculty.nps.edu/brutzman</span></p>
<p style="margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;"><span style="font-family: "Courier New"; font-size: 9pt;"> </span></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Brutzman, Donald (Don) (CIV) <brutzman@nps.edu><br>
<b>Sent:</b> Monday, December 9, 2024 9:39 AM<br>
<b>To:</b> Holger Seelig <holger.seelig@yahoo.de>; X3D <x3d-public@web3d.org><br>
<b>Cc:</b> khyoo@chungbuk.ac.kr <khyoo@chungbuk.ac.kr>; Myeong Won Lee <myeongwonlee@gmail.com><br>
<b>Subject:</b> Re: [x3d-public] X3D 4.0 specification problem: upVector field for TextureProjector, TextureProjectorParallel</font>
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(corrected/completed version)</div>
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Hi Holger - great to hear of your interest and efforts, thank you.</div>
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<br>
Am thinking the default upVector ought to point in the "up" direction expected by users.</div>
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<div style="direction:ltr">Wikipedia: Principle of least astonishment</div>
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<div style="direction:ltr">https://en.wikipedia.org/wiki/Principle_of_least_astonishment</div>
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The following Web3D member-only resources for X3D 4.1 have been updated to track this issue.</div>
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<div style="direction:ltr">Mantis 1481: upVector field for TextureProjector, TextureProjectorParallel nodes</div>
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<div style="direction:ltr">https://mantis.web3d.org/view.php?id=1481</div>
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</div>
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<div style="direction:ltr">Github version control</div>
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<div class="x_elementToProof" style="direction:ltr">https://github.com/Web3DConsortium/X3D/blob/master/ISO-IEC19775/ISO-IEC19775-1/ISO-IEC19775-1v4.1/ISO-IEC19775-1v4.1-CD/Part01/components/textureProjection.html</div>
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Also happy to announce that committee-draft X3D 4.1 (with initial component revisions) is visible online for best encouragement of interoperable adoption by implementers.</div>
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<div class="x_elementToProof" style="direction:ltr">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD</div>
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<div class="x_elementToProof" style="direction:ltr">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/components/textureProjection.html</div>
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Further improvements always welcome. Dick and I will carefully review these changes in our next X3D specification editors meeting.</div>
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<br>
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Follow-on work to update validation tools and demonstration examples will continue once consensus is confirmed on the precise node syntax and semantics for TextureProjector and TextureProjectorParallel.</div>
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<br>
Web3D Consortium membership certainly has value. Am proud to recommend membership to everyone who wants to support 3D graphics on the Web.</div>
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<div class="x_elementToProof" style="direction:ltr">Join the Web3D Consortium</div>
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<div class="x_elementToProof" style="direction:ltr">https://www.web3d.org/membership/join</div>
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Have fun with X3D! 🙂</div>
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<p style="margin:0in; font-family:Calibri,sans-serif; font-size:11pt"><span style="font-family:"Courier New"; font-size:9pt">all the best, Don</span></p>
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<p style="margin:0in; font-family:Calibri,sans-serif; font-size:11pt"><span style="font-family:"Courier New"; font-size:9pt">Don Brutzman Naval Postgraduate School, Code USW/Br brutzman@nps.edu</span></p>
<p style="margin:0in; font-family:Calibri,sans-serif; font-size:11pt"><span style="font-family:"Courier New"; font-size:9pt">Watkins 270, MOVES Institute, Monterey CA 93943-5000 USA +1.831.656.2149</span></p>
<p style="margin:0in; font-family:Calibri,sans-serif; font-size:11pt"><span style="font-family:"Courier New"; font-size:9pt">X3D graphics, virtual worlds, navy robotics https://faculty.nps.edu/brutzman</span></p>
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<div id="x_x_divRplyFwdMsg" dir="ltr"><span style="font-family:Calibri,sans-serif; font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Holger Seelig <holger.seelig@yahoo.de><br>
<b>Sent:</b> Sunday, December 8, 2024 1:12 AM<br>
<b>To:</b> X3D <x3d-public@web3d.org><br>
<b>Cc:</b> Brutzman, Donald (Don) (CIV) <brutzman@nps.edu>; khyoo@chungbuk.ac.kr <khyoo@chungbuk.ac.kr>; Myeong Won Lee <myeongwonlee@gmail.com><br>
<b>Subject:</b> Re: [x3d-public] X3D 4.0 specification problem: upVector field for TextureProjector, TextureProjectorParallel</span></div>
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<div style="direction:ltr">That is very good news. I will update X_ITE accordingly.</div>
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<div style="direction:ltr">Maybe now is also the time to change the *direction* vector to (-1 -1 -1) on the example page
<a href="https://www.web3d.org/x3d/content/examples/Basic/X3dSpecifications/TextureProjectorComponentExampleIndex.html" data-auth="NotApplicable" id="OWAb2cc61d8-e192-f8d8-8afc-14df27942504" class="x_x_OWAAutoLink">
https://www.web3d.org/x3d/content/examples/Basic/X3dSpecifications/TextureProjectorComponentExampleIndex.html</a>, then the projector would point exactly into the corner of the model.</div>
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<div style="direction:ltr">Best regards,</div>
<div style="direction:ltr">Holger</div>
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<div style="direction:ltr; text-align:left; text-indent:0px; color:rgb(0,0,0)">Holger Seelig</div>
<div style="direction:ltr; text-align:left; text-indent:0px; color:rgb(0,0,0)">Leipzig, Germany</div>
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<div style="direction:ltr; text-align:left; text-indent:0px; color:rgb(0,0,0)">holger.seelig@yahoo.de</div>
<div style="direction:ltr; text-align:left; text-indent:0px; color:rgb(0,0,0)">https://create3000.github.io/x_ite/</div>
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<div style="direction:ltr">Am 08.12.2024 um 05:21 schrieb Brutzman, Donald (Don) (CIV) via x3d-public <x3d-public@web3d.org>:</div>
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While performing regression testing using X3D Examples Archive, found several problems related to the upVector field.</div>
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First, upVector is defined in X3D Architecture specification for TextureProjector node but not TextureProjectorParallel node. However the corresponding figures illustrate that upVector is an integral part of each node's definition.</div>
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Second, the default value is "0 0 1" but this looks wrong (rotated confusingly), and a much-more intuitive value is "0 1 0" with y-axis up. In other words, the default upVector direction ought to point upwards. This is the default relationship is shown in
both figures and the specification example for TextureProjector.</div>
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<div style="direction:ltr">X3D 4.0 Architecture, clause 42 Texture projection component</div>
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<div style="direction:ltr"><a href="https://www.web3d.org/specifications/X3Dv4/ISO-IEC19775-1v4-IS/Part01/components/textureProjection.html" data-auth="NotApplicable" id="OWA6051ade1-1d0d-e70f-1b1a-649f3085d18d" class="x_x_OWAAutoLink">https://www.web3d.org/specifications/X3Dv4/ISO-IEC19775-1v4-IS/Part01/components/textureProjection.html</a></div>
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<div style="direction:ltr">42.3.1 X3DTextureProjectorNode</div>
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<div style="direction:ltr">42.4.1 TextureProjector</div>
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<div style="direction:ltr">Figure 42.5 — Description of 3D perspective texture projection</div>
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<div style="direction:ltr">"The <i>upVector</i> describes the roll of the camera by saying which point is "up" in the camera's orientation. The default value of this field is (0 0 1)."</div>
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<div style="direction:ltr"><a href="https://www.web3d.org/specifications/X3Dv4/ISO-IEC19775-1v4-IS/Part01/components/textureProjection.html#TextureProjector" data-auth="NotApplicable" id="OWAa7f1596e-6295-d85b-20a9-329c1ec5ec83" class="x_x_OWAAutoLink">https://www.web3d.org/specifications/X3Dv4/ISO-IEC19775-1v4-IS/Part01/components/textureProjection.html#TextureProjector</a></div>
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<div style="direction:ltr">42.4.2 TextureProjectorParallel</div>
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<div style="direction:ltr">Figure 42.4 —Description of 3D parallel texture projection</div>
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<div style="direction:ltr"><a href="https://www.web3d.org/specifications/X3Dv4/ISO-IEC19775-1v4-IS/Part01/components/textureProjection.html#TextureProjectorParallel" data-auth="NotApplicable" id="OWAa11f43a2-3d85-c2ab-4fdd-61d7ae07464b" class="x_x_OWAAutoLink">https://www.web3d.org/specifications/X3Dv4/ISO-IEC19775-1v4-IS/Part01/components/textureProjection.html#TextureProjectorParallel</a></div>
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Third, I am unable to find a working implementation for these nodes, though we have seen FreeWrl (at least) working in the past.</div>
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Recommended specification remedies:</div>
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<div style="direction:ltr">Include upVector field in TextureProjectorParallel node and shared node type X3DTextureProjectorNode</div>
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<div style="direction:ltr">Change default values to "0 1 0"</div>
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<div style="direction:ltr">Include an example for TextureProjectorParallel node, similar to TextureProjector node</div>
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<div style="direction:ltr">Fix erroneous figure labels so that they are properly numbered</div>
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<div style="direction:ltr">Update Mantis error tracker, various validation tools, X3D Tooltips, X3DJSAIL and X3DPSAIL x3d.py, etc.</div>
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<div style="direction:ltr">Encourage, hopefully ensure that multiple browser implementations are available.</div>
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Test scene:</div>
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<div style="direction:ltr">X3D Example Archives: Basic, X3D Specifications, Texture Projector Component Example</div>
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<div style="direction:ltr"><a href="https://www.web3d.org/x3d/content/examples/Basic/X3dSpecifications/TextureProjectorComponentExampleIndex.html" data-auth="NotApplicable" id="OWA2115c0d6-72fa-460a-da6b-e406b6f93d57" class="x_x_OWAAutoLink">https://www.web3d.org/x3d/content/examples/Basic/X3dSpecifications/TextureProjectorComponentExampleIndex.html</a></div>
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Thanks in advance for all feedback on these corrections, plus any implementation reports.</div>
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<div style="margin:0in; font-family:"Courier New"; font-size:9pt">all the best, Don</div>
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<div style="margin:0in; font-family:"Courier New"; font-size:9pt">Don Brutzman Naval Postgraduate School, Code USW/Br <a href="mailto:brutzman@nps.edu" id="OWA01089a8c-277c-8e70-0178-b5e5f498ba7e" class="x_x_OWAAutoLink">brutzman@nps.edu</a></div>
<div style="margin:0in; font-family:"Courier New"; font-size:9pt">Watkins 270, MOVES Institute, Monterey CA 93943-5000 USA +1.831.656.2149</div>
<div style="margin:0in; font-family:"Courier New"; font-size:9pt">X3D graphics, virtual worlds, navy robotics
<a href="https://faculty.nps.edu/brutzman" data-auth="NotApplicable" id="OWA70eec17d-114e-5b07-78dc-5e8c0385438a" class="x_x_OWAAutoLink">
https://faculty.nps.edu/brutzman</a></div>
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