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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>Thanks for continuing scrutiny. Improving X3D player support for the advanced capabilities possible using NURBS is certainly a worthy goal.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It is mathematically possible to render smooth/seamless edges across the coincident edges of adjacent NURBS surfaces by adjusting normal vectors of the respective edge vertices. Since vertex computation for each patch might have a different slope as it approaches the edge from either side, slopes will be different at the coincident edge vertices. Thus independent computation of each surface’s normal vectors by GPU will have different vector direction on each side.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>(btw this is why I proposed an edgeNormal field for the boundaries of an ElevationGrid, different adjacent grids typically show such seams. No one in GeoSpatial Working Group was ready to pursue it, perhaps we might try again someday in X3D4.1.)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Anyway such adjustments are a declared capability of NURBS representations, reasonably intuitive, and a long-accepted capability in the X3D specification.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Of relevant note is that many fancy models such as automobiles etc. are often represented using numerous NURBS patches. None of the advertising images I’ve seen reveal seams everywhere… so these high-fidelity tools must be using some form of this technique.<o:p></o:p></p><p class=MsoNormal><br>One might think that an author might achieve the same effect by adding specially calculated Normal nodes corresponding to each of the Nurbs nodes in a scene. Ordinarily normals are not included in X3D scenes because they lead to larger file sizes and also are easily recalculated by GPU rendering hardware. However it is pretty difficult (probably impossible) to even define for Nurbs surfaces since the browser is free to compute the tessellation of a parametric surface at whatever fidelity is desired. Hence you need a NurbsSet node to identify such commonality of surfaces which together define a single shape.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>For some of your other questions: if I recall correctly, Bezier b-splines have arbitrary expressive power to define surfaces and so any geometric surface might be replaced by a corresponding NURBS version. This technique is often used in a terrain-reduction context to get adjustable fidelity while progressively smoothing and simplifying raggedy terrain tessellations.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:black'>X3DParametricGeometryNode and X3DNurbsSurfaceGeometryNode were each defined during the evolution of X3D in order to collect shared fields in the object-oriented interfaces. They are each limited to NURBS, internal abstract interfaces (not nodes) and not necessarily part of any independent implementation.<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'>It would be interesting to know if<o:p></o:p></span></p><ol style='margin-top:0in' start=1 type=a><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo3'>Any of the X3D implementations support NurbsSet operations,<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo3'>Open-source implementations such as Blender support such operations.<o:p></o:p></li></ol><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Have fun with X3D Nurbs! 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> Friday, May 13, 2022 10:28 AM<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><div><div><p class=MsoNormal>Sorry, further questions keep popping up. Are we sure that the NURBS Surfaces directly under the X3DParametricGeometryNode can be smoothly aligned with the other NURBS surfaces under<span style='font-size:10.0pt;font-family:"Courier New";color:black'> X3DNurbsSurfaceGeometryNode </span> ? Indeed, it kind of looks like all the interesting stuff which may be required for smoothing may be in <span style='font-size:10.0pt;font-family:"Courier New";color:black'>X3DNurbsSurfaceGeometryNode (compare with NurbsCurve). If we move to the higher interface, fields valuable to smoothing may not appear in the concrete nodes?</span><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:black'>This cones from someone with only a book knowledge of MURBS 35 or so years ago.</span><o:p></o:p></p></div><div style='border:none white 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><o:p> </o:p></p></div><div style='border:none white 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:black'>Im basically wondering why there are two abstract nodes, and why </span><span style='color:black'>X3DParametricGeometryNode was placed under a the Nurbs section.</span><o:p></o:p></p></div><div style='border:none white 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><o:p> </o:p></p></div><div style='border:none white 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><span style='color:black'>I have interesting parametric geometry, but i can’t ever see It smoothed with NURBS or placed in a NurbsSet.</span><o:p></o:p></p></div><div style='border:none white 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><o:p> </o:p></p></div><div style='border:none white 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><span style='color:black'>As a reference, imagine the surface</span><o:p></o:p></p></div><div style='border:none white 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span style='color:black'> r = radiusAverage + radiusRange * cos (numThetaLeaves * theta) * cos (numPhiLeaves * phi)</span><o:p></o:p></p></div><div style='border:none #202124 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span style='color:black'>in spherical coordinates.</span><o:p></o:p></p></div><div style='border:none #DEDFE3 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><o:p> </o:p></p></div><div style='border:none #DEDFE3 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><span style='color:black'>If X3D is extensible, where would I extend from for this surface?</span><o:p></o:p></p></div><div style='border:none white 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><o:p> </o:p></p></div><div style='border:none white 1.0pt;padding:0in 0in 0in 0in;background-color:rgba(0,0,0,0)'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:black'>John</span><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Fri, May 1 2022 at 10:13 AM Brutzman, Donald (Don) (<a href="mailto:CIbrutzman@nps.edu">CIbrutzman@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'>Looking at the ouInterface Hierarchy shows what implements those types, confirming that only Nurbs nodes are involved. This also clearly identifies why we shifted the interface involved.<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"'>+- X3DParametricGeometryNode -+- NurbsCurve</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"'> +- NurbsSweptSurface</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"'> +- NurbsSwungSurface</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"'> +- X3DNurbsSurfaceGeometryNode -+- NurbsPatchSurface</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"'> +- NurbsTrimmedSurface</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'>Dick points out that someday in (some wonderful) future we might allow other geometry nodes to get smoothly aligned next to Nurbs nodes. That will be nice – but we are OK for now.<o:p></o:p></p></div></div><div><div><div><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"'>faculty.nps.edu/brutzman</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> Thursday, May 12, 2022 7:39 AM<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] Mantis 27.4.9 NurbSet - Change child geometry model to X3DParametricGeometryNode<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'>Understood, i am just trying to work through if there’s any parametric geometry which isn’t NURBS, and is thus now inclusive in this modified NurbsSet.<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'>Thanks!<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'>John <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'>On Thu, May 12, 2022 at 8:58 AM Brutzman, Donald (Don) (CIV) <<a href="mailto:brutzman@nps.edu" target="_blank">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-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>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 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'>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 style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><br>Thanks for your review.<o:p></o:p></p></div></div><div><div><div><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></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> Wednesday, May 11, 2022 10:40 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] Mantis 27.4.9 NurbSet - Change child geometry model to X3DParametricGeometryNode<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><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'>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 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'>Would ParametricGeometrySet be a better name than NurbsSet, or a good addition to X3D4?<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'>Is it counterintuitive to look for a "ParametricGeometrySet" inside NURBS sections?<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'>How does this impact browser implementations?<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'>I don't know if the standard includes parametric, implicit, etc. descriptions?<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'>Are we planning on dropping X3DNurbsSurfaceGeometryNode in the future?<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'>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 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'>I have no other issues that come to mind presently.<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'>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 style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>and X3DNurbsSurfaceGeometryNode sub node types for geometry?<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'>Thanks!<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'>John<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'>On Wed, May 11, 2022 at 8:06 PM Brutzman, Donald (Don) (CIV) <<a href="mailto:brutzman@nps.edu" target="_blank">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-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><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=m-8791452676912006077m-7018129747725680411gmail-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=m-8791452676912006077m-7018129747725680411gmail-m1426268416439981635msolistparagraph style='mso-list:l1 level1 lfo1'>https://www.web3d.org/member-only/mantis/view.php?id=700<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=m-8791452676912006077m-7018129747725680411gmail-m1426268416439981635msolistparagraph style='mso-list:l2 level1 lfo2'>X3D4 Architecture, NURBS component, 27.4.8 NurbsSet<o:p></o:p></li><li class=m-8791452676912006077m-7018129747725680411gmail-m1426268416439981635msolistparagraph style='mso-list:l2 level1 lfo2'>https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#NurbsSet<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 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></blockquote></div></div></div></div></blockquote></div></div></div></div></div></blockquote></div></div></div></div></body></html>