[x3d-public] example model illustrating DEF/USE copy-by-sharing relationships (Brutzman, Donald (Don) (CIV))

Fri Aug 9 13:19:40 PDT 2024

Happy to apply these change suggestions, thank you Andreas.

  *
https://www.web3d.org/x3d/content/examples/X3dForAdvancedModeling/Animation/DEF_USE_AnimationExampleIndex.html

"Deep dive" computer science:  rather than contrast between "pass by copy" or  "pass by reference", am thinking we are closer to "pass by sharing".

  *
Wikipedia: Evaluation strategy, pass by sharing
  *
https://en.wikipedia.org/wiki/Evaluation_strategy#Call_by_sharing

Have fun being an X3D copycat!  🙂

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

________________________________
From: x3d-public <x3d-public-bounces at web3d.org> on behalf of Andreas Plesch via x3d-public <x3d-public at web3d.org>
Sent: Monday, August 5, 2024 4:54 AM
To: X3D Graphics public mailing list <x3d-public at web3d.org>
Cc: Andreas Plesch <andreasplesch at gmail.com>
Subject: [x3d-public] example model illustrating DEF/USE copy-by-sharing relationships (Brutzman, Donald (Don) (CIV))

Thanks for sharing this nice model.

It took me a little to discover that it is necessary to keep the mouse
button pressed down for the animation to occur. Perhaps "To animate,
press objects with a pointing device" works a little better. Another
option may be to switch to "isOver" and ".., hover ..".

The UserMessage text could use the TextAppearance for consistency and
since the theme is DEF/USE.

Cheers, Andreas

> Date: Mon, 5 Aug 2024 08:48:03 +0000
> From: "Brutzman, Donald (Don) (CIV)" <brutzman at nps.edu>
> To: "X3D Public Mailing List (x3d-public at web3d.org)"
>         <x3d-public at web3d.org>
> Subject: [x3d-public] example model illustrating DEF/USE
>         copy-by-sharing relationships
>
> Dick Puk and I continue working steadily on specification Mantis issues.  Latest is
>
>
>   *
> DEF/USE labelling and functionality needs to be better specified for SAI and programming languages
>   *
> https://www.web3d.org/member-only/mantis/view.php?id=690
>
> Towards this end, I build a new animation model that seems helpful.  Feedback welcome.
>
>
>   *
>  X3D Example Archives: X3D4AM, X3D for Advanced Modeling, Animation, DEF USE Animation Example
>   *
> Illustrate how USE nodes implement copy by reference, resulting in immediate changes when original DEF node is modified.
>   *
> https://www.web3d.org/x3d/content/examples/X3dForAdvancedModeling/Animation/DEF_USE_AnimationExample.x3d
>   *
> https://www.web3d.org/x3d/content/examples/X3dForAdvancedModeling/Animation/DEF_USE_AnimationExampleIndex.html
>   *
> [cid:670f7613-98f3-4bef-8981-ee1b1d5d19c3]
>
> Incidentally I used both XMLSpy and X3D-Edit to create the model, which was interesting and effective.  Also updated all the catalog files for X3D Examples Archive to make such tasks even easier.  Meanwhile found a setting in XMLSpy that aligns handling of whitespace with X3D Canonical Form, which is what we use in version control and diffing and XML security and X3D Binary.  Pretty simple adjustment: use 2 spaces instead of tabs for indentation.
>
>
>   *   Altova XMLSpy https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.altova.com%2Fxmlspy-xml-editor&data=05%7C02%7Cbrutzman%40nps.edu%7C6021b1c85e4b4913076608dcb5458e99%7C6d936231a51740ea9199f7578963378e%7C0%7C0%7C638584558553788479%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C40000%7C%7C%7C&sdata=D9Hy%2BpaBBPNaeMiKvZoomvU7ZEK%2BTuHi%2B%2BZg8Oig2Wo%3D&reserved=0<https://www.altova.com/xmlspy-xml-editor>
>   *
> https://www.web3d.org/x3d/content/examples/X3dForAdvancedModeling/Animation/XMLSpyPrettyPrintSpacingTextViewSettings.png
>
> 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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--
Andreas Plesch
Waltham, MA 02453

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