[x3d-public] Over next several weeks, I will be ramping up

[John Carlson]

Sorry for any confusion, I’m trying to convert abstract geometry (in X3D)
to triangle or face meshes in ECMAScript and then to STL.  If someone has
done this before, how did you choose a mesh for each shape (sphere, cone,
cylinder, extrusion, 2D). I already know NURBS is complex, for that, but
I’ve not done animated NURBS, which sounds really hard, and perhaps not
good looking???  Has anyone animated NURBS?   Jello, anyone?

I’m not looking to produce X3D at this point,  going from a low level
triangle code to abstract geometry sounds really hard, but perhaps
lucrative?   Isn’t this what the scanning group is doing?  Do they use
OpenCascade, C++, and Python?

I’ll look at your Pascal code now.

John

On Tue, Dec 20, 2022 at 6:58 AM Michalis Kamburelis <
michalis.kambi at gmail.com> wrote:

> STL already contains a simple list of triangles. So if by "tesselation"
> you mean "ability to produce triangles from more complex shapes", you don't
> really need it for STL :)
>
> Note that CGE, view3dscene and https://castle-engine.io/convert.php can
> convert STL -> X3D. The code to handle STL is really simple and you can
> likely adjust it for other purposes / libraries / languages :
> https://github.com/castle-engine/castle-engine/blob/master/src/scene/load/x3dloadinternalstl.pas
> .
>
> Regards,
> Michalis
>
> wt., 20 gru 2022 o 12:07 John Carlson <yottzumm at gmail.com> napisał(a):
>
>> [image: image.png]
>>
>> The Stereo Lithography (STL) export converter from X3D JSON to STL looks
>> like low hanging fruit. I just need to find some good tesselation code in
>> ECMAScript. I already have a basic framework. Can anyone recommend A-Frame,
>> Three.js, Babylon.js, Unity, X3DOM or X_ITE code for doing tesselation, or
>> is it built into WebGL?  Meanwhile, I will be working on meshes and
>> creating a project, etc.
>>
>> On Tue, Dec 20, 2022 at 4:45 AM John Carlson <yottzumm at gmail.com> wrote:
>>
>>> Over the next several weeks, I will be ramping up for potential return
>>> to work, testing out CTS coping skills (laying on a different side, taking
>>> breaks), computer hygiene, sleeping hygiene etc.
>>>
>>> My wife has given me the thumbs up to return to work remotely.
>>>
>>> So if there's any X3D tasks, I should be able to pick some of them up, I
>>> will look at the wishlist.
>>>
>>> BTW, has anyone attached Gmail to GPT-3?
>>>
>>> Everyone have a merry xmas and happy new year.
>>>
>>> Thanks!
>>>
>>> John
>>>
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>>
>
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