[x3d-public] ProtoInstance USE without name

[Andreas Plesch]

Thanks, I will take a look.

---on the phone---

On Sat, Nov 28, 2020, 9:17 AM Christoph Valentin <christoph.valentin at gmx.at>
wrote:

> Hi Andreas,
>
> I felt free to provide an example scene in three flavors.
>
> The prototype renders a little pig that says "Eatme!", when you touch it
> (in remembrance of Douglas Adams)
>
> Version A: <ProtoInstance USE="xxx" name="yyy"/>    WITH name attribute -
> standards compliant
> Version B: <ProtoInstance USE="xxx"/>  WITHOUT name attribute
> Version C: <Script USE="xxx"/>  WORKAROUND - works for all browsers
>
> I tested with BS Contact --- he can cope with all three versions.
>
> Download the .zip file at
> https://lc-soc-lc.at/experimental/ProtoInstanceWithUSE/     I provide it
> by a GPLv3.
>
> Feed Back welcome. You may take it and give it to your benchmark tests, if
> you like.
>
> Kind regards,
> Christoph
>
>
> *Gesendet:* Dienstag, 24. November 2020 um 00:30 Uhr
> *Von:* "Andreas Plesch" <andreasplesch at gmail.com>
> *An:* "Christoph Valentin" <christoph.valentin at gmx.at>
> *Cc:* "X3D Graphics public mailing list" <x3d-public at web3d.org>
> *Betreff:* Re: [x3d-public] ProtoInstance USE without name
> Hi Christoph,
>
> thanks, interesting. Perhaps it will be useful to try a USE ProtoInstance
> in a very simple scene, in multiple browsers.
>
> -Andreas
>
> On Mon, Nov 23, 2020 at 1:01 PM Christoph Valentin <
> christoph.valentin at gmx.at> wrote:
>
>>
>> Hi
>>
>> This bug is common to many X3D players (even classical non-WebGL X3D
>> players).
>>
>> I was used to use following workaround, which worked for all relevant
>> players:
>>
>> If I want to USE a DEFd ProtoInstance, I will actually instantiate a
>> <Script> node with USE.
>>
>> KR,
>> Christoph
>>
>> *Gesendet:* Montag, 23. November 2020 um 00:00 Uhr
>> *Von:* "Andreas Plesch" <andreasplesch at gmail.com>
>> *An:* "X3D Graphics public mailing list" <x3d-public at web3d.org>
>> *Betreff:* [x3d-public] ProtoInstance USE without name
>> Looking at why the old Prototypes for HAnim did not work properly for
>> x3dom, I found that the xml examples typically have a ProtoInstance
>> statement with a USE attribute but without the corresponding name attribute
>> defining the actual node type. However, x3dom expects a name attribute with
>> every ProtoInstance statement, even USE ones, to be able to insert the
>> appropriate node.
>>
>> The xml spec  at
>>
>>
>> https://www.web3d.org/documents/specifications/19776-1/V3.3/Part01/concepts.html#ProtoInstanceAndFieldValueStatement
>>
>> does not address USE of ProtoInstances but all examples always have a
>> name attribute.
>>
>> Also, in my quite extensive testing of Protos, I did not come across
>> other examples of ProtoInstance elements without a name attribute.
>>
>> To be fair, the name attribute is not strictly necessary for USE
>> ProtoInstances since the type of the inserted node can be determined from
>> the referenced DEF node. But having the name attribute makes ProtoInstance
>> elements more similar to regular nodes. So I think not requiring the name
>> attribute for USE ProtoInstances should be explicitly allowed in the xml
>> spec., but still be encouraged.
>>
>> I do not think the xml spec. would be otherwise affected by V.4 ?
>>
>> Best, Andreas
>>
>> --
>> Andreas Plesch
>> Waltham, MA 02453
>> _______________________________________________ x3d-public mailing list
>> x3d-public at web3d.org
>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>>
>
>
> --
> Andreas Plesch
> Waltham, MA 02453
>
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