[x3d-public] recovering/reconstructing NURBS diagrams in X3D Architecture specification

[GPU Group]

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


On Thu, Feb 24, 2022 at 9:55 AM Brutzman, Donald (Don) (CIV) <
brutzman at nps.edu> wrote:

> We are performing final editorial review of Mantis issues collected over
> the years.  Here is one that is still outstanding.
>
>
>
> The following figures are pretty good but could be improved, particularly
> if the original models were available somewhere.
>
>
>
> Does anybody know where these are?  Alternatively might anyone want to
> recreate or improve these figures?
>
>
>
>    - X3D4 Architecture, Figure 27.3 - NurbsSweptSurface
>    - Mantis 515: Figure 27.3 - NurbsSweptSurface
>    - https://www.web3d.org/member-only/mantis/view.php?id=514
>    -
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#f-NurbsSweptSurface
>    -
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Images/NurbsSweptSurface.png
>
>
>
>    - X3D4 Architecture, Figure 27.4 — NurbsSwungSurface
>    - Mantis 514: Figure 27.4 - NurbsSwungSurface
>    -
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#f-NurbsSwungSurface
>    -
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Images/NurbsSwungSurface.png
>
>
>
>    - X3D4 Architecture, Figure 27.5 — NurbsTrimmedSurface
>    -
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/nurbs.html#f-NurbsTrimmedSurface
>    -
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Images/NurbsTrimmedSurface.png
>
>
>
> 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.
>
>
>
> Thanks for considering this.  Have fun with X3D!
>
>
>
> all the best, Don
>
> --
>
> Don Brutzman  Naval Postgraduate School, Code USW/Br
> brutzman at nps.edu
>
> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA
> +1.831.656.2149
>
> X3D graphics, virtual worlds, Navy robotics https://
> faculty.nps.edu/brutzman
>
>
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>
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