<div dir="ltr">The Nurbs Book, Piegl et al, show those diagrams (very close copies). I don't have that book -I borrowed it from the library when programming the NURBS component- but a nice thing about them is you know when you're in the right chapter of The Nurbs Book when you see a diagram that looks like the web3d Nurbs Component diagram. -Doug<div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Feb 24, 2022 at 9:55 AM Brutzman, Donald (Don) (CIV) <<a href="mailto:brutzman@nps.edu">brutzman@nps.edu</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 lang="EN-US" style="overflow-wrap: break-word;"><div class="gmail-m_33706570801849981WordSection1"><p class="MsoNormal">We are performing final editorial review of Mantis issues collected over the years.  Here is one that is still outstanding.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">The following figures are pretty good but could be improved, particularly if the original models were available somewhere.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Does anybody know where these are?  Alternatively might anyone want to recreate or improve these figures?<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><ul style="margin-top:0in" type="disc"><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in">X3D4 Architecture, Figure 27.3 - NurbsSweptSurface<u></u><u></u></li><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in">Mantis 515: Figure 27.3 - NurbsSweptSurface<u></u><u></u></li><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in"><a href="https://www.web3d.org/member-only/mantis/view.php?id=514" target="_blank">https://www.web3d.org/member-only/mantis/view.php?id=514</a><u></u><u></u></li><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in"><a href="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#f-NurbsSweptSurface" target="_blank">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#f-NurbsSweptSurface</a> <u></u><u></u></li><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in"><a href="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Images/NurbsSweptSurface.png" target="_blank">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Images/NurbsSweptSurface.png</a> <u></u><u></u></li></ul><p class="gmail-m_33706570801849981MsoListParagraph"><u></u> <u></u></p><ul style="margin-top:0in" type="disc"><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in">X3D4 Architecture, Figure 27.4 — NurbsSwungSurface <u></u><u></u></li><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in">Mantis 514: Figure 27.4 - NurbsSwungSurface<u></u><u></u></li><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in"><a href="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#f-NurbsSwungSurface" target="_blank">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#f-NurbsSwungSurface</a><u></u><u></u></li><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in"><a href="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Images/NurbsSwungSurface.png" target="_blank">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Images/NurbsSwungSurface.png</a><u></u><u></u></li></ul><p class="MsoNormal" style="margin-left:0.25in"><u></u> <u></u></p><ul style="margin-top:0in" type="disc"><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in">X3D4 Architecture, Figure 27.5 — NurbsTrimmedSurface<u></u><u></u></li><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in"><a href="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#f-NurbsTrimmedSurface" target="_blank">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#f-NurbsTrimmedSurface</a><u></u><u></u></li><li class="gmail-m_33706570801849981MsoListParagraph" style="margin-left:0in"><a href="https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Images/NurbsTrimmedSurface.png" target="_blank">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Images/NurbsTrimmedSurface.png</a><u></u><u></u></li></ul><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">This should be an interest little project if someone wants to pursue it.  Results will retain full credit and get faithfully saved/shared in the X3D Examples Archives.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Thanks for considering this.  Have fun with X3D!<u></u><u></u></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">all the best, Don<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">-- <u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">Don Brutzman  Naval Postgraduate School, Code USW/Br        <a href="mailto:brutzman@nps.edu" target="_blank">brutzman@nps.edu</a><u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA    +1.831.656.2149<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:"Courier New"">X3D graphics, virtual worlds, Navy robotics https://</span> <span style="font-size:10pt;font-family:"Courier New""><a href="http://faculty.nps.edu/brutzman" target="_blank">faculty.nps.edu/brutzman</a><u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p></div></div>_______________________________________________<br>
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