<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hi Andreas,</div>
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<div>I felt free to provide an example scene in three flavors.</div>
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<div>The prototype renders a little pig that says "Eatme!", when you touch it (in remembrance of Douglas Adams)</div>
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<div>Version A: <ProtoInstance USE="xxx" name="yyy"/> WITH name attribute - standards compliant</div>
<div>Version B: <ProtoInstance USE="xxx"/> WITHOUT name attribute</div>
<div>Version C: <Script USE="xxx"/> WORKAROUND - works for all browsers</div>
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<div>I tested with BS Contact --- he can cope with all three versions.</div>
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<div>Download the .zip file at <a href="https://lc-soc-lc.at/experimental/ProtoInstanceWithUSE/">https://lc-soc-lc.at/experimental/ProtoInstanceWithUSE/</a> I provide it by a GPLv3.</div>
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<div>Feed Back welcome. You may take it and give it to your benchmark tests, if you like.</div>
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<div>Kind regards,</div>
<div>Christoph</div>
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<div style="margin:0 0 10px 0;"><b>Gesendet:</b> Dienstag, 24. November 2020 um 00:30 Uhr<br/>
<b>Von:</b> "Andreas Plesch" <andreasplesch@gmail.com><br/>
<b>An:</b> "Christoph Valentin" <christoph.valentin@gmx.at><br/>
<b>Cc:</b> "X3D Graphics public mailing list" <x3d-public@web3d.org><br/>
<b>Betreff:</b> Re: [x3d-public] ProtoInstance USE without name</div>
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<div>Hi Christoph,
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<div>thanks, interesting. Perhaps it will be useful to try a USE ProtoInstance in a very simple scene, in multiple browsers.</div>
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<div>-Andreas</div>
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<div class="gmail_attr">On Mon, Nov 23, 2020 at 1:01 PM Christoph Valentin <<a href="mailto:christoph.valentin@gmx.at" onclick="parent.window.location.href='mailto:christoph.valentin@gmx.at'; return false;" target="_blank">christoph.valentin@gmx.at</a>> wrote:</div>
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<div>Hi</div>
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<div>This bug is common to many X3D players (even classical non-WebGL X3D players).</div>
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<div>I was used to use following workaround, which worked for all relevant players:</div>
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<div>If I want to USE a DEFd ProtoInstance, I will actually instantiate a <Script> node with USE.</div>
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<div>KR,</div>
<div>Christoph</div>
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<div style="margin: 0.0px 0.0px 10.0px;"><b>Gesendet:</b> Montag, 23. November 2020 um 00:00 Uhr<br/>
<b>Von:</b> "Andreas Plesch" <<a href="mailto:andreasplesch@gmail.com" onclick="parent.window.location.href='mailto:andreasplesch@gmail.com'; return false;" target="_blank">andreasplesch@gmail.com</a>><br/>
<b>An:</b> "X3D Graphics public mailing list" <<a href="mailto:x3d-public@web3d.org" onclick="parent.window.location.href='mailto:x3d-public@web3d.org'; return false;" target="_blank">x3d-public@web3d.org</a>><br/>
<b>Betreff:</b> [x3d-public] ProtoInstance USE without name</div>
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<div>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.
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<div>The xml spec at</div>
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<div><a href="https://www.web3d.org/documents/specifications/19776-1/V3.3/Part01/concepts.html#ProtoInstanceAndFieldValueStatement" target="_blank">https://www.web3d.org/documents/specifications/19776-1/V3.3/Part01/concepts.html#ProtoInstanceAndFieldValueStatement</a></div>
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<div>does not address USE of ProtoInstances but all examples always have a name attribute.</div>
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<div>Also, in my quite extensive testing of Protos, I did not come across other examples of ProtoInstance elements without a name attribute.</div>
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<div>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.</div>
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<div>I do not think the xml spec. would be otherwise affected by V.4 ?</div>
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<div>Best, Andreas</div>
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<div>Andreas Plesch<br/>
Waltham, MA 02453</div>
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<div>Andreas Plesch<br/>
Waltham, MA 02453</div>
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