[x3d-public] STL rendering on GitHub; diffing and next steps for X3D

[John Carlson]

It would be clever to hook in a GitHub raw file into X3DJSONLD as a first
step.

On Sun, Jun 6, 2021 at 1:09 PM Don Brutzman <brutzman at nps.edu> wrote:

> Thanks John and Cecile.  The pages say that Three.js is used to power
> these presentations.
>
> Gitlab also has built-in STL rendering for checked-in models.  A lot of
> these things are around.
>
> * https://github.com/topics/stl-viewer
>
> * https://www.viewstl.com
>
> It would be great to adapt X_ITE and/or X3DOM in the same manner for X3D
> files.
>
> Found this interesting capability for diffs (differences) on the github
> stl docs page:
>
> ==========================================================================
> *
> https://docs.github.com/en/github/managing-files-in-a-repository/working-with-non-code-files/3d-file-viewer#diffs
>
> * https://docs.github.com/assets/images/help/repository/stl_wireframe.png
>
> Diffs
> When looking at a commit or set of changes which includes an STL file,
> you'll be able to see a before and after diff of the file.
>
> By default, you'll get a view where everything unchanged is in wireframe.
> Additions are colored in green, and removed parts are colored in red.
>
> You can also select the Revision Slider option, which lets you use a
> slider at the top of the file to transition between the current and
> previous revisions.
> ==========================================================================
>
> Diffing is very important for change management, quality assurance (QA),
> Continuous Integration Continuous Development (CI/CD), DevSecOps and
> Digital Twin application domains.
>
> Continuing below:
>
> On 6/5/2021 12:01 AM, Cecile Muller wrote:
> >
> > well it was added 8 years ago:
> > https://github.blog/2013-04-09-stl-file-viewing/
> > but I agree it's convenient :)
> >
> > See you,
> > Cecile
>
>
> On 6/3/2021 2:01 PM, John Carlson wrote:
> > Docs:
> >
> >
> https://docs.github.com/en/github/managing-files-in-a-repository/working-with-non-code-files/3d-file-viewer
> >
> > On 6/3/21 2:45 PM, John Carlson wrote:
> >>
> https://github.com/coderextreme/X3DJSONLD/blob/master/src/main/stl/UavBeehive.stl
>
> student original-design model created using blender follows.  As ever,
> note how STL is unable to include metadata.
>
> *
> https://x3dgraphics.com/examples/X3dForAdvancedModeling/AdditiveManufacturing/UavBeehiveIndex.html
>
> *
> https://x3dgraphics.com/examples/X3dForAdvancedModeling/AdditiveManufacturing/UavBeehiveBlenderScreenshot.png
>
> *
> https://x3dgraphics.com/examples/X3dForAdvancedModeling/AdditiveManufacturing/UavBeehive.blend
>
> *
> https://x3dgraphics.com/examples/X3dForAdvancedModeling/AdditiveManufacturing/UavBeehive.stl
>
> > It seems like the "big guys" are finally paying attention to 3D models
> on the web!
> >
> > John
>
> I hope us "little people" can
>
> a. document good geometry design correspondences between STL and X3D
> IndexedFaceSet,
> b. write X3dToStl.xslt conversion stylesheet,
> c. add STL export/import as direct capability in X3D-Edit,
> d. document workflow between X3D and STL, then
> e. do the same for PLY format (conceptually quite similar),
> f. allow STL loading as Shape geometry in X3D4 specification,
> g. tackle geometric diffing for X3D models (we already have text-diff and
> viewpoint capture-as-image-image-diff capabilities).
>
> 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
>
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