[x3d-public] X3D agenda 10 SEP 2021, Mantis issue 1372 regarding Prototype declaration and follow-on nodes

[John Carlson]

I attempted to read the standard .   My understanding of the way forward is
to replaced the proto body with an instance with a switch node with two
choices.    The first choice is the first node in the ProtoBody and the
second is the rest of the proto body.

I have no idea how events will work with the script node.  TBD.

My approach in the past has been to totally remove all traces of “Proto”
since in the past X3DOM did not support it.

I suggest a way forward is to remove my Proto Expander in X3DOM.   Then
pass DOM nodes to Andreas’ Proto code.


On Thu, Sep 9, 2021 at 1:48 PM Brutzman, Donald (Don) (CIV) <
brutzman at nps.edu> wrote:

> We will meet at regular coordinates, 1000 pacific Friday 10 SEP 2021.
>
>
>
> Today Dick and I worked on improved definition and example for nodes
> following the initial node in a prototype declaration.  We made excellent
> progress towards improved clarity. Review requested.
>
>
>
>    - 4.4.4.3 PROTO definition semantics
>    -
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/concepts.html#PROTOdefinitionsemantics
>    - 7.3.6 X3DPrototypeInstance
>    -
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/core.html#X3DPrototypeInstance
>    - https://www.web3d.org/member-only/mantis/view.php?id=1372
>
>
>
> Example image for discussion attached… if lines 24,,26 are moved up inside
> the Shape, or Appearance, or Box, then the prototype declaration is no
> longer a valid scene subgraph and fails validation.
>
>
>
>
>
> A more detailed example can be found in X3D for Web Authors (X3D4WA),
> online at
>
>
>
>    - X3D Example Archives: X3D4WA, X3D for Web Authors, Chapter 14
>    Prototypes, Material Modulator
>    -
>    https://x3dgraphics.com/examples/X3dForWebAuthors/Chapter14Prototypes/MaterialModulatorIndex.html
>
>
>
> 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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