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<div class="moz-cite-prefix">John,<br>
<br>
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<div dir="auto">XSeen is taking the approach of treating glTF as a
model. What are others doing? Is anyone considering the whole
scenegraph? Why or why not? Is glTF as a model done because
Three.js treats glTF as a mesh (I don't know if three.js does
this or not)?</div>
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XSeen and A-Frame both use the glTF loader for THREE. The loader
imports the entire model and texture (a mesh in THREE terminology).
Both also include all of the animations and any scene graph
structure. However, that structure (including animations) is sort-of
encapsulated from the rest of the scene graph. There are no events
that are fired during animation sequences. <br>
<br>
X3DOM treats the glTF file as what can be represented in a single
Shape node - geometry + appearance. Transforms and animation are not
included.<br>
<br>
<br>
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<div dir="auto"><br>
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<div dir="auto">What do people think of the low level nature of
glTF as opposed to X3D? </div>
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glTF ranges from low-level (geometry + basic appearance) to full
scene graph. I am not sure how to interpret your question.<br>
<br>
glTF is becoming the standard exchange format. It includes (more or
less) everything in FBX, but it is open. It has more options than
OBJ, and is smaller in size. I think it is necessary to be able to
process glTF and include it in a scene graph, much like the glTF
importer for THREE. Yes, it does overlap with X3D. <br>
<br>
<br>
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<div dir="auto">While it makes it less understandable, I can see
how keeping glTF low level would improve performance at the
expense of file size. Has anyone compared and contrasted the
two standards?</div>
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Which two standards - X3D & glTF? glTF has better animation, it
has been adopted by more users and content creators (people &
software). It comes in a binary and text forms. It has the potential
for being the entire scene graph. It includes shaders and advanced
appearance (bump maps, ambient occlusion, etc.).<br>
<br>
On the downside, I don't think it has audio, movie textures,
environmental effects (fog, background, etc.), or sensors. I may be
wrong about some of these items because I haven't studied glTF in
its entirety -- I just haven't come across those capabilities yet.<br>
<br>
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<div dir="auto"><br>
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<div dir="auto">Are there glTF importer/exporters for blender
yet? If not, why not?</div>
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There will be a BOF at SIGGRAPH about Blender exporters including a
glTF exporter. I am not sure about an importer. Since there is a
THREE loader, I suspect it would not be that difficult to build an
importer.<br>
<br>
<br>
Leonard Daly<br>
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<div dir="auto">John<br>
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<p class="MsoNormal">I’m thinking about glTF and
X3DJSONLD interoperability since X3DOM is starting
to support glTF (I think). What do you think the
synergies might be?</p>
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<div class="moz-signature">-- <br>
<font class="tahoma,arial,helvetica san serif" color="#333366">
<font size="+1"><b>Leonard Daly</b></font><br>
3D Systems & Cloud Consultant<br>
LA ACM SIGGRAPH Chair<br>
President, Daly Realism - <i>Creating the Future</i>
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