[osg-users] the new glTF format by the Kronos Group

[Christian Buchner]

Hi all,

The Khronos group has published a specification for a data exchange and transmission format for 3D objects and scenes, it appears

https://github.com/KhronosGroup/glTF

I think the OpenScenegraph community might be a interesting in implementing a a file format plugin, or even come up with a standaloner viewer for this format.

So far it is hard to tell if this format will be widely adopted. But having support in OSG from an early point in time could either make OSG more popular, or glTF...  ;)

Christian

[Jan Ciger]

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Hello,

Interesting, I wasn't aware of something like this being in the works.
It could be useful to support, indeed. If someone is building a new
application, this could potentially save them some work, especially if
there will be tooling available.

On the other hand, I don't see much potential for this as an
interoperability format because I don't see major game/3D engine
vendors abandoning their proprietary "baked" asset for this. There is
too much investment in their existing tooling already and a vendor
lock-in is a major factor in their interest too. E.g. Unity wouldn't
want to make it easier for their paying customers to jump ship to
Unreal (or vice versa). The same for the various asset stores these
companies are running - vendor lock-in is a major advantage there,
because they get to be the gatekeeper and collect toll.

J.

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[Chris Hanson]

I could probably crank out a glTF loader in short work if anybody was interested. I haven't had any clients come forth demanding one yet, but it may happen. We'll see. Can't be any more complicated than COLLADA! ;)

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[Jan Ciger]

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On 20/10/15 20:56, Chris Hanson wrote:
> I could probably crank out a glTF loader in short work if anybody
> was interested. I haven't had any clients come forth demanding one
> yet, but it may happen. We'll see. Can't be any more complicated
> than COLLADA! ;)

Well, considering it is a part binary format, I wouldn't underestimate
it :) It could be easily a similarly complex mess, only in a different
way.

J.
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[Christian Buchner]

Apologies for not proofreading my initial post as much. "a interesting" should have been "interested".

Well, there is some source code in the Khronos github repository, but it's mostly a Collada 2 glTF converter as well as some JavaScript code for loading such content into WebGL I suppose.

So it seems the implementation of a reader plug-in would have to be mostly from scratch. A writer plug-in might be slightly easier to come up with, based on parts of the Collada 2 glTF converter.

Christian