barramundiFish normals

[blitz-research]

Hi,

I'm trying to find a sample with some normal mapping.

BarramundiFish has a normal map in it's 'images' chunk, but it doesn't seem to be referenced by anything.

Is there another model I can try?

Bye!
Mark

[pjcozzi]

@blitz-research I'm not aware of any (but we would welcome a pull request when you find one!), but I suspect there are some as part of the PBR work, KhronosGroup/glTF#643

@sbtron @cedricpinson do you have a glTF model with normal mapping?

[sbtron]

@blitz-research here are some sample models with the glTF 2.0 that use normal maps - https://github.com/sbtron/BabylonJS-glTFLoader/tree/master/Models/BarramundiFish/2.0
https://github.com/sbtron/BabylonJS-glTFLoader/tree/master/Models/Telephone/2.0

Still working on testing these out. The same models are also available in the 1.0 format with the PBR extension and can be seen here - https://sbtron.github.io/BabylonJS-glTFLoader/

[cedricpinson]

Not updated yet but here where we have stuff about gltf https://sketchfab.com/features/gltf Cedric

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On 14 Feb 2017, at 01:11, Patrick Cozzi ***@***.***> wrote: @blitz-research I'm not aware of any (but we would welcome a pull request when you find one!), but I suspect there are some as part of the PBR work, KhronosGroup/glTF#643 @sbtron @cedricpinson do you have a glTF model with normal mapping? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.

[blitz-research]

I suspect there are some as part of the PBR work

This looks cool! Unfortunately, there doesn't seem to be a normalTexture in there either...?

here are some sample models with the glTF 2.0 that use normal maps

Nice models! The telephone is esp. cool, is it PBR?

But what is glTF 2.0 all about? I can't find any references to it here...

https://github.com/KhronosGroup/glTF

...the 'specification' dir only has 1.0 in it.

[blitz-research]

Ok, just found this:

KhronosGroup/glTF#817

So glTF2.0 is glTF1.0 + PBR material system?

Still can't find any references to normalTexture or anything here...

https://github.com/tsturm/glTF/tree/master/extensions/Vendor/FRAUNHOFER_materials_pbr

...but I'm about to hack into the 2.0 models linked to above!

[sbtron]

Still wip. PR is here - KhronosGroup/glTF#830

[blitz-research]

Quick question: The 2.0 barramundi fish model appears to store root nodes in arrays, not objects - is this legal?

I'm using the gltf 'cheatsheet' as my main docs, and it states scenes, nodes etc are 'given as dictionaries'. Not sure of the exact definiton of dictionary in JSON - does it include both objects and arrays?

Anyway, think I might wait until 2.0 (and the cheatsheet!) before attempting to extract normals from a gltf file. Think I'll just hack a 'normalTexture' into 1.0 barramundiFish for now.

[sbtron]

Yes arrays is a change in 2.0 - KhronosGroup/glTF#831
See this discussion on the normal maps - KhronosGroup/glTF#699
They are now being included as additional textures in the 2.0 spec.
For 1.0 they could be added as part of the pbr extension.
This example - https://github.com/sbtron/BabylonJS-glTFLoader/tree/master/Models/BarramundiFish/PBR-MetalRoughness
shows how it was done in 1.0 + PBR extension. 2.0 is essentially taking the same texture data just rearranging the json so its becomes part of the core.
Sorry lots of flux, we are days away from getting 2.0 done so that its easier to read and all in one place.

[blitz-research]

Sorry lots of flux, we are days away from getting 2.0 done so that its easier to read and all in one place.

No problem - thanks heaps for the help and I'm really looking forward to glTF2.0!

[lexaknyazev]

Closed, since normal maps were implemented in schema and samples.

[emackey]

@blitz-research We now have a sample model that directly compares geometric features to normal-mapped features.

https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/NormalTangentTest