<div dir="ltr">Thanks, Don.<div><br></div><div>Let us know if X3DJSAIL and X3DUOM are ready for X3D 4.1. I'm guessing there will be new versions of the files?</div><div><br></div><div>Thanks,</div><div><br></div><div>John</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Mon, Dec 9, 2024 at 11:39 AM Brutzman, Donald (Don) (CIV) via x3d-public <<a href="mailto:x3d-public@web3d.org">x3d-public@web3d.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg6723788937653767873">
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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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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"><a href="https://en.wikipedia.org/wiki/Principle_of_least_astonishment" target="_blank">https://en.wikipedia.org/wiki/Principle_of_least_astonishment</a></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"><a href="https://mantis.web3d.org/view.php?id=1481" target="_blank">https://mantis.web3d.org/view.php?id=1481</a></div>
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<div style="direction:ltr">Github version control</div>
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<div style="direction:ltr"><a href="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" target="_blank">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</a></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 style="direction:ltr"><a href="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD" target="_blank">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD</a></div>
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<div style="direction:ltr"><a href="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/components/textureProjection.html" target="_blank">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/components/textureProjection.html</a></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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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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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 style="direction:ltr">Join the Web3D Consortium</div>
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<div style="direction:ltr"><a href="https://www.web3d.org/membership/join" target="_blank">https://www.web3d.org/membership/join</a></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 <a href="mailto:brutzman@nps.edu" target="_blank">brutzman@nps.edu</a></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 <a href="https://faculty.nps.edu/brutzman" target="_blank">https://faculty.nps.edu/brutzman</a></span></p>
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<div id="m_6723788937653767873x_divRplyFwdMsg" dir="ltr"><span style="font-family:Calibri,sans-serif;font-size:11pt;color:rgb(0,0,0)"><b>From:</b> Holger Seelig <<a href="mailto:holger.seelig@yahoo.de" target="_blank">holger.seelig@yahoo.de</a>><br>
<b>Sent:</b> Sunday, December 8, 2024 1:12 AM<br>
<b>To:</b> X3D <<a href="mailto:x3d-public@web3d.org" target="_blank">x3d-public@web3d.org</a>><br>
<b>Cc:</b> Brutzman, Donald (Don) (CIV) <<a href="mailto:brutzman@nps.edu" target="_blank">brutzman@nps.edu</a>>; <a href="mailto:khyoo@chungbuk.ac.kr" target="_blank">khyoo@chungbuk.ac.kr</a> <<a href="mailto:khyoo@chungbuk.ac.kr" target="_blank">khyoo@chungbuk.ac.kr</a>>; Myeong Won Lee <<a href="mailto:myeongwonlee@gmail.com" target="_blank">myeongwonlee@gmail.com</a>><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" id="m_6723788937653767873OWAb2cc61d8-e192-f8d8-8afc-14df27942504" target="_blank">
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>
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--</div>
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Holger Seelig</div>
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Leipzig, Germany</div>
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<a href="mailto:holger.seelig@yahoo.de" target="_blank">holger.seelig@yahoo.de</a></div>
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<a href="https://create3000.github.io/x_ite/" target="_blank">https://create3000.github.io/x_ite/</a></div>
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<div style="direction:ltr">Am 08.12.2024 um 05:21 schrieb Brutzman, Donald (Don) (CIV) via x3d-public <<a href="mailto:x3d-public@web3d.org" target="_blank">x3d-public@web3d.org</a>>:</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" id="m_6723788937653767873OWA6051ade1-1d0d-e70f-1b1a-649f3085d18d" target="_blank">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" id="m_6723788937653767873OWAa7f1596e-6295-d85b-20a9-329c1ec5ec83" target="_blank">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" id="m_6723788937653767873OWAa11f43a2-3d85-c2ab-4fdd-61d7ae07464b" target="_blank">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" id="m_6723788937653767873OWA2115c0d6-72fa-460a-da6b-e406b6f93d57" target="_blank">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>
<div style="margin:0in;font-family:"Courier New";font-size:9pt">--</div>
<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="m_6723788937653767873OWA01089a8c-277c-8e70-0178-b5e5f498ba7e" target="_blank">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" id="m_6723788937653767873OWA70eec17d-114e-5b07-78dc-5e8c0385438a" target="_blank">
https://faculty.nps.edu/brutzman</a></div>
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