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

[Brutzman, Donald (Don) (CIV)]

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.

[cid:image001.png at 01D7A570.0501C040]

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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