[X3D-Public] [Cad] CADPart contains CADFace nodes - an opposing view

[Don Brutzman]

Vince, this is an excellent set of examples.  Thanks.

What do you think about this approach:  letting CADFace contain
Transform, in addition to Shape and LOD.  This would be consistent
with letting CADPart and CADFace just containing atomic geometry.

The currently allowed node hierary follows, with possible addition
of (Transform) shown in parentheses.

-	CADPart
--		CADFace
---			Shape
---			LOD
----				Shape (or Transform) only
---			(Transform)
----				Shape (or Transform) only

This would be a good refinement to the spec that would simplify
an author's construction of geometry within CADFace/CADPart.
It is kind of silly to force someone to use Shape/IFS/Coordinate
or other polygonal nodes when simple insertion of a Transform
will allow easier constructs.

Let's create a Mantis issue documenting all this during the call
today.  Absent any objections, I can reconcile X3D Schema and DTD
to match, and we can work on browser support for Transform under
CADFace (which is a pretty trivial change).

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