[x3d-public] [x3dom-developers] Nurbs for x3dom

[Joseph D Williams]

I would still suggest study best practices of best x3d implementations along with interviews and code reviews with folks that have deployed working code. After I study again a bit I think this is not that much of problem and lots has been done in nD+1 and more somehow stitched together to form a very realistic continuous mesh with up to 1 pixel resolution. Like for greatest fun with hanim skin. 

What is the possible NURBS related data carried by gltf? Collada? These would be the basics. 

http://www.web3d.org/sites/default/files/page/X3D%20Version%204/glTfX3dFeaturesComparison.pdf

Also, the x3d NURBS standard should include all interfaces to build a fine authortime environment that should allow users to compose NURBS elements in the scene interactively in x3d realtime runtime. 

Thanks for your work in this and all, 
Joe





Sent from Mail for Windows 10

From: Andreas Plesch
Sent: Friday, September 7, 2018 7:44 AM
To: Don Brutzman
Cc: Joe D Williams; X3D Graphics public mailing list; x3dom-developer mlist
Subject: Re: [x3dom-developers] [x3d-public] Nurbs for x3dom

Thanks for the pointer. I took a look but it is unclear if it is
possible to generalize this 2d method by Santina to 3d surface
patches. Also it seems to rely on reducing order to quadratic which
may often not be possible/desirable.
jgeom seems unrelated to GP. It does look like a good method structure
for construction of the various X3D Nurb nodes. Does it attempt to
optimize animation in some way, eg. changes to control points/weights
?

On Fri, Sep 7, 2018 at 7:39 AM Don Brutzman <brutzman at nps.edu> wrote:
>
> On 9/6/2018 12:44 PM, Joseph D Williams wrote:
> > https://www.shadertoy.com/view/XtXfWn
> >
> > NURBS Rendering
> >
> > Thanks,
> >
> > Joe
>
> described at
>
>         http://jogamp.org/doc/gpunurbs2011/p70-santina.pdf
>
> about 5-6 years ago, Vince Marchetti and I worked a bit on jgeom library.  interesting resource, glad we archived it there so that it wasn't lost.
>
>         https://sourceforge.net/projects/jgeom
>
> you can find email about those efforts in email archives for "source at web3d.org" mailing list
>
> 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 http://faculty.nps.edu/brutzman
>


-- 
Andreas Plesch
Waltham, MA 02453

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