[x3d-public] ProtoInstance USE without name

[Andreas Plesch]

Yes. I was saying these are the only Proto examples I came across which do
have USE without a name. To me it would be clearer and more similar to
regular nodes if name would be always added, perhaps even required (even
though not strictly necessary).

Andreas

On Sun, Nov 22, 2020 at 6:21 PM John Carlson <yottzumm at gmail.com> wrote:

> I'm not finding any name's and USE's together in ProtoInstance node in the
> LOA*.x3d examples from the HAnim 2 part 1 spec.
>
> grep ProtoInstance LOA*x3d|grep USE|grep name
>
> John
>
> On Sun, Nov 22, 2020 at 5:02 PM Andreas Plesch <andreasplesch at gmail.com>
> wrote:
>
>> 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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