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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Please be assured, no new semantics and no new functionality is being proposed. We are addressing a Mantis issue that noted the NurbsSet definition was unnecessarily restrictive. We adjusted the specification interface to match that inclusive rationale.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Changes to implementations are up to them. Since NurbsSet is a way for authors to communicate when various Nurbs nodes are coincident and potentially smoothable, it has no impact on functionality and might improve rendering appearance by enabling smoothed seams.<o:p></o:p></p><p class=MsoNormal><br>Thanks for your review.<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> Wednesday, May 11, 2022 10:40 PM<br><b>To:</b> Brutzman, Donald (Don) (CIV) <brutzman@nps.edu><br><b>Cc:</b> X3D Public Mailing List (x3d-public@web3d.org) <x3d-public@web3d.org><br><b>Subject:</b> Re: [x3d-public] Mantis 27.4.9 NurbSet - Change child geometry model to X3DParametricGeometryNode<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Don, I'm a bit unsure of the new semantics for NurbsSet....it includes other parametric geometry nodes which aren't NURBS? <o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Would ParametricGeometrySet be a better name than NurbsSet, or a good addition to X3D4?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Is it counterintuitive to look for a "ParametricGeometrySet" inside NURBS sections?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>How does this impact browser implementations?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I don't know if the standard includes parametric, implicit, etc. descriptions?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Are we planning on dropping X3DNurbsSurfaceGeometryNode in the future?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>NURBS seems a bit specialized, but at least I know I'm looking for NURBS. Parametric seems *way* general, and should probably remain at the abstract level.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I have no other issues that come to mind presently.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I'm a bit leery of Mantis, so I will now review your next email. My summary: Can one include more than one abstract type in the allowable types? That is, allow both <span style='font-size:10.0pt;font-family:"Courier New";color:black;background:yellow'>X3DParametricGeometryNode</span><o:p></o:p></p></div><div><p class=MsoNormal>and X3DNurbsSurfaceGeometryNode sub node types for geometry?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks!<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></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Wed, May 11, 2022 at 8:06 PM Brutzman, Donald (Don) (CIV) <<a href="mailto:brutzman@nps.edu">brutzman@nps.edu</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>NurbsSet should be inclusive about which nodes an author thinks can be rendered together as one smooth surface.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><ul type=disc><li class=gmail-m1426268416439981635msolistparagraph style='mso-list:l1 level1 lfo1'>Mantis 27.4.9 NurbSet - Change child geometry model to X3DParametricGeometryNode <o:p></o:p></li><li class=gmail-m1426268416439981635msolistparagraph style='mso-list:l1 level1 lfo1'><a href="https://www.web3d.org/member-only/mantis/view.php?id=700" target="_blank">https://www.web3d.org/member-only/mantis/view.php?id=700</a><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><ul type=disc><li class=gmail-m1426268416439981635msolistparagraph style='mso-list:l0 level1 lfo2'>X3D4 Architecture, NURBS component, 27.4.8 NurbsSet<o:p></o:p></li><li class=gmail-m1426268416439981635msolistparagraph style='mso-list:l0 level1 lfo2'><a href="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#NurbsSet" target="_blank">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#NurbsSet</a><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'>Since X3DParametricGeometryNode includes X3DNurbsSurfaceGeometryNode, changed all three NurbsSet geometry fields from X3DNurbsSurfaceGeometryNode to X3DParametricGeometryNode.<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'><span style='font-size:10.0pt;font-family:"Courier New"'>NurbsSet : X3DChildNode, X3DBoundedObject {</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"'> MFNode [in] addGeometry [<span style='color:black;background:yellow'>X3DParametricGeometryNode</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:"Courier New"'> MFNode [in] removeGeometry [<span style='color:black;background:yellow'>X3DParametricGeometryNode</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:"Courier New"'> MFNode [in,out] geometry [] [<span style='color:black;background:yellow'>X3DParametricGeometryNode</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:"Courier New"'> SFNode [in,out] metadata NULL [X3DMetadataObject]</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"'> SFFloat [in,out] tessellationScale 1.0 (0,∞)</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"'> SFVec3f [] bboxCenter 0 0 0 (-∞,∞)</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"'> SFVec3f [] bboxSize -1 -1 -1 [0,∞) or −1 −1 −1</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'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>This changes X3DUOM and possibly some implementations. 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'>We current intend to accept this change as resolved once X3DUOM is updated.<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>_______________________________________________<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></blockquote></div></div></div></body></html>