[x3d-public] Finding more than one use of a DEF in VRML - Chisel, duplicated DEF in proto

[John Carlson]

Can we get the nomenclature right?  What is a DEF name, a DEF keyword, a
DEF value and a node name?

Thanks,

John

On Thu, Mar 26, 2020 at 10:14 AM John Carlson <yottzumm at gmail.com> wrote:

> So what should we do about the triple DEF's in the HAnim 2.0 Annex A,
> LOA-4 Diamond example?
> I haven't verified if it's in a separate scope or not.  Hmm. I will get
> line numbers.  It looks like they're separate from the PROTO bodies?
>
> I am unsure if the ProtoExpander can handle this or not.  I do a lot of
> DEF concatenation, and I also add 1000's as part of the DEF, so that when
> the ProtoBody's are expanded, they get a new DEF.
>
> John
>
>
> On Thu, Mar 26, 2020 at 10:04 AM John Carlson <yottzumm at gmail.com> wrote:
>
>> Thumbs up on the chisel tool.  I'll be looking for some way to run via
>> command line, so I can capture and search output.
>>
>> Thanks a bunch, Doug, very helpful!
>>
>> Perhaps we should put "VRML validation" somewhere near the chisel tool in
>> the X3D resources? IDK, I don't know it's main purpose.
>>
>> John
>>
>> On Thu, Mar 26, 2020 at 9:26 AM Don Brutzman <brutzman at nps.edu> wrote:
>>
>>> On 3/25/2020 7:11 PM, GPU Group wrote:
>>> > Chisel? "it was simply put in the public domain by Trapezium when they
>>> folded many years ago. They didn¹t specify any license" - Louka
>>> > http://dug9.users.sourceforge.net/web3d/temp/chisel-src.zip
>>>
>>> Also
>>>
>>> * X3D Resources: Conversions and Translation Tools
>>>
>>> https://www.web3d.org/x3d/content/examples/X3dResources.html#Conversions
>>>
>>> * 15. Chisel VRML Optimisation Tool
>>>    http://www2.hrp.no/vr/tools/chisel/install.htm
>>>
>>>    with autoinstaller
>>>    http://www2.hrp.no/vr/tools/chisel/install.htm
>>>
>>>    and documentation
>>>    http://www2.hrp.no/vr/tools/chisel/doc/index.html
>>>
>>>    provided by Halden Virtual Reality Centre.
>>>    http://www2.hrp.no/vr/about/index.html
>>>
>>>    Originally built by Trapezium and maintained by NIST.
>>>    http://ovrt.nist.gov/chisel.html
>>>    (link no longer working, hoping to find replacement)
>>>
>>> > But I suspect double-deffing isn't illegal. I think I've been through
>>> it, and different browsers honored the first or last definition.
>>> > -Doug
>>>
>>> Agreed.  Although it is legal in X3D abstract specification and in
>>> VRML/ClassicVRML encodings, it leads to validation difficulties in XML (and
>>> at some point JSON when JSON Schema is finished).
>>>
>>> Wondering if we should define a suggested practice for de-duplicating
>>> DEF names within a proto, e.g.
>>>
>>>         MyWhizzyProto includes DEF SomeDuplicatedName
>>>
>>> might get tidied up to globally rename
>>>
>>>         MyWhizzyProto includes DEF MyWhizzyProto.SomeDuplicatedName
>>>
>>> We might also apply this in the PrototypeExpander work if that gets
>>> revisited.
>>>
>>> Thoughts?
>>>
>>> > On Wed, Mar 25, 2020 at 7:43 PM John Carlson <yottzumm at gmail.com
>>> <mailto:yottzumm at gmail.com>> wrote:
>>> >
>>> >     That is, more than one DEF with the same value.
>>> >
>>> >     I realize that separate PROTOs may have the same DEF due to
>>> namespaces. Unfortunately writing a Unix script to find this takes massive
>>> brain power.
>>> >
>>> >     John
>>> >
>>> >     On Wed, Mar 25, 2020 at 8:37 PM John Carlson <yottzumm at gmail.com
>>> <mailto:yottzumm at gmail.com>> wrote:
>>> >
>>> >         I’m not particular looking for a vrml parser unless it catches
>>> double use of a DEF.
>>>
>>> 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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