[Solved] Does the Blender importer work with Animations?

thecyberbob · December 11, 2018, 3:05pm

Never mind. Apparently my export sucks.

mitm · December 11, 2018, 3:16pm

If the asset doesn’t appear after a gltf export, restart the jdk. Usually happens if the sdk throws an exception related to a blender export. That’s been my experience with gltf and sdk.

Darkchaos · December 11, 2018, 3:24pm

Well in that case, Bob forgot to copy the .bin file along with the gltf (sometimes gltf files are split into gltf and bin, don’t ask me what and why)

mitm · December 11, 2018, 3:42pm

To export the file, click on the File menu, hover over the Export menu option, and click either glTF 2.0 (.glTF) or glTF 2.0 (.glb). The difference between the output is that a .glTF will export a glTF file, a binary file for the mesh, and all of the textures as individual files where the .glb will export only one binary file with everything contained.

thecyberbob · December 11, 2018, 4:02pm

So that got over the can’t find “bin” file issue. Up comes a new one

An Exception has occured when trying to load asset Cubie
com.jme3.asset.AssetLoadException: An error occurred loading Models/Cubie/Cubie.gltf
	at com.jme3.scene.plugins.gltf.GltfLoader.loadFromStream(GltfLoader.java:150)
	at com.jme3.scene.plugins.gltf.GltfLoader.load(GltfLoader.java:78)
	at com.jme3.asset.DesktopAssetManager.loadLocatedAsset(DesktopAssetManager.java:259)
	at com.jme3.asset.DesktopAssetManager.loadAsset(DesktopAssetManager.java:373)
	at com.jme3.asset.DesktopAssetManager.loadModel(DesktopAssetManager.java:416)
	at com.jme3.gde.core.assets.SpatialAssetDataObject.loadAsset(SpatialAssetDataObject.java:94)
	at com.jme3.gde.core.assets.actions.ConvertModel$1.run(ConvertModel.java:65)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
	at com.jme3.math.Vector3f.set(Vector3f.java:152)
	at com.jme3.math.Transform.<init>(Transform.java:61)
	at com.jme3.scene.plugins.gltf.GltfLoader$BoneWrapper.update(GltfLoader.java:1226)
	at com.jme3.scene.plugins.gltf.GltfLoader.readAnimation(GltfLoader.java:819)
	at com.jme3.scene.plugins.gltf.GltfLoader.loadFromStream(GltfLoader.java:136)
	... 7 more

Strange question though on this. Does the gtlf support work better in 3.2.2? I’m running 3.2.1 stable.

Ali_RS · December 11, 2018, 4:23pm

Can you try it also with Editor: jMonkeyBuilder

thecyberbob · December 11, 2018, 4:30pm

Just giving it a download. It’s getting flagged as a virus strangely.

thecyberbob · December 11, 2018, 4:35pm

Ok. Got it installed. Still not converting.

com.jme3.asset.AssetLoadException: An error occurred loading Cubie.gltf
	at com.jme3.scene.plugins.gltf.GltfLoader.loadFromStream(GltfLoader.java:150)
	at com.jme3.scene.plugins.gltf.GltfLoader.load(GltfLoader.java:78)
	at com.jme3.asset.DesktopAssetManager.loadLocatedAsset(DesktopAssetManager.java:259)
	at com.jme3.asset.DesktopAssetManager.loadAsset(DesktopAssetManager.java:373)
	at com.ss.editor.file.converter.impl.AbstractModelFileConverter.convertImpl(AbstractModelFileConverter.java:146)
	at com.ss.editor.file.converter.impl.AbstractModelFileConverter.lambda$convert$1(AbstractModelFileConverter.java:123)
	at com.ss.editor.executor.impl.BackgroundEditorTaskExecutor.doExecute(BackgroundEditorTaskExecutor.java:44)
	at com.ss.editor.executor.impl.AbstractEditorTaskExecutor.run(AbstractEditorTaskExecutor.java:150)
Caused by: java.lang.NullPointerException
	at com.jme3.math.Vector3f.set(Vector3f.java:152)
	at com.jme3.math.Transform.<init>(Transform.java:61)
	at com.jme3.scene.plugins.gltf.GltfLoader$BoneWrapper.update(GltfLoader.java:1226)
	at com.jme3.scene.plugins.gltf.GltfLoader.readAnimation(GltfLoader.java:819)
	at com.jme3.scene.plugins.gltf.GltfLoader.loadFromStream(GltfLoader.java:136)
	... 7 more

 caused by java.lang.NullPointerException
	at com.jme3.math.Vector3f.set(Vector3f.java:152)
	at com.jme3.math.Transform.<init>(Transform.java:61)
	at com.jme3.scene.plugins.gltf.GltfLoader$BoneWrapper.update(GltfLoader.java:1226)
	at com.jme3.scene.plugins.gltf.GltfLoader.readAnimation(GltfLoader.java:819)
	at com.jme3.scene.plugins.gltf.GltfLoader.loadFromStream(GltfLoader.java:136)
	at com.jme3.scene.plugins.gltf.GltfLoader.load(GltfLoader.java:78)
	at com.jme3.asset.DesktopAssetManager.loadLocatedAsset(DesktopAssetManager.java:259)
	at com.jme3.asset.DesktopAssetManager.loadAsset(DesktopAssetManager.java:373)
	at com.ss.editor.file.converter.impl.AbstractModelFileConverter.convertImpl(AbstractModelFileConverter.java:146)
	at com.ss.editor.file.converter.impl.AbstractModelFileConverter.lambda$convert$1(AbstractModelFileConverter.java:123)
	at com.ss.editor.executor.impl.BackgroundEditorTaskExecutor.doExecute(BackgroundEditorTaskExecutor.java:44)
	at com.ss.editor.executor.impl.AbstractEditorTaskExecutor.run(AbstractEditorTaskExecutor.java:150)

Ali_RS · December 11, 2018, 4:40pm

Can you try to load your gltf in these online viewers to see if it loads fine

https://sandbox.babylonjs.com/

https://gltf-viewer.donmccurdy.com/

thecyberbob · December 11, 2018, 4:53pm

Well that is a bit peculiar.

So those 2 online viewers work for the glb file but not the gtlf.

I guess that’s because the glb as was mentioned earlier includes the binary?

One thing that I saw in the viewers is that there’s no texture defined. I didn’t define one. Is that a problem?

Ali_RS · December 11, 2018, 5:02pm

Of-course, you should not upload gltf file separately. They should be uploaded with each other.

Not sure, but I don’t think it would be the problem. You can try though.
If you are using this add-on

make sure to follow this doc

github.com

KhronosGroup/glTF-Blender-Exporter/blob/master/docs/user.md

User Documentation
------------------

### glTF 2.0 Materials

glTF 2.0 introduced two PBR materials: The Metallic-Roughness and Specular-Glossiness workflow. As the Metallic-Roughness is integrated into core glTF 2.0, details are explained for this workflow. For Specular-Glossiness, it is similar or almost the same.

At point of writing, Blender supports two material settings: One for `Blender Render` and one for `Cycles Render`. Fortunately, the glTF 2.0 Materials can be simulated using the `Cycles Render` by implementing a custom node tree. Advantage is, that the preview of the Cycles output is almost 1:1 to the expected rendering output when using the glTF 2.0 materials.

However, this custom node tree needs to be imported and linked to a Blender file. For the future, it is planned to use the `Eevee` shader node, which will replace the current node group.

For shadeless materials, glTF 2.0 also has an Unlit material extension. Unlit materials use Diffuse or vertex colors as input, and cannot currently be created with Cycles nodes. Materials with the *Shadeless* setting enabled will automatically use the glTF 2.0 Unlit extension.

#### Integrating glTF 2.0 PBR Materials

Following picture shows a basic Blender scene using the Cycles renderer.

![glTF 01 Blender Scene](glTF_01_Blender_Scene.png)

If this scene would be exported, the perspective camera and Suzanne are written to the glTF 2.0 file. However, this scene would not contain any materials. As this glTF 2.0 file is valid, any glTF 2.0 render would use a default material.

This file has been truncated. show original

Ali_RS · December 11, 2018, 5:03pm

Finally you can also try with this add-on

thecyberbob · December 11, 2018, 5:35pm

I’m going to try to make a smaller model test case. Just a bendy box thing to keep things super simple and see what happens then.

I thought the glTF-Blender-IO pluggin was for 2.80 and up. 2.79b and down was supposed to use the one you linked.

I’ll post my results. Shouldn’t take too long.

Ali_RS · December 11, 2018, 5:40pm

It should work fine on 2.79 also.

mitm · December 11, 2018, 6:00pm

Correct, first link. The I/o didn’t work when I tried it.

Did you use the correct method for linking your nodes?

Read this User Doc also.

You need to read all three and may also need to create a material and use the jme PBRLighting material definition and manually link your assets there.

You will also need to add a light probe to your game.

and read,
https://wiki.jmonkeyengine.org/jme3/advanced/pbr_part1.html

If you want to convert images to a texture you will need a third party app to make your materials, like Materialize - handy free tool that converts an image to PBR textures
or
https://www.allegorithmic.com/products/bitmap2material

The good thing is that as of 2.8 gltf is already included.

Edit: substance vs materialize. I found materialize produced the best results by far and its free.

Edit: PBR kicks ass once you get the pipeline down.

jayfella · December 11, 2018, 6:10pm

I read somewhere from remy that you could upload it to sketch fab and download it as gtlf. It’s not really the greatest workflow in the world but I believe their code is a higher standard than the Kronos one.

mitm · December 11, 2018, 6:12pm

Unless this policy has changed, not for free.

thecyberbob · December 11, 2018, 6:33pm

Righto. I’ll give them a read. See how it goes. Annnnnd if things go bang I’ll be back… fresh tears in my eyes.

Thanks for your help!

thecyberbob · December 17, 2018, 11:19pm

So I’ve had some luck with the whole gltf thing. The newer version for exporting works fine enough for a model that is just a model with no animations. Those web pages you linked earlier seems to work with my new “embedded gltf” file (although the animations are doing some seriously crazy things in there). But when I try to convert from gltf to j3o I get the following:

JME only supports linear interpolation for animations
JME only supports linear interpolation for animations
JME only supports linear interpolation for animations
JME only supports linear interpolation for animations
An Exception has occured when trying to load asset Cubie.gltf.glb
com.jme3.asset.AssetLoadException: An error occurred loading Models/Cubie/Cubie.gltf.glb.gltf
	at com.jme3.scene.plugins.gltf.GltfLoader.loadFromStream(GltfLoader.java:150)
	at com.jme3.scene.plugins.gltf.GltfLoader.load(GltfLoader.java:78)
	at com.jme3.asset.DesktopAssetManager.loadLocatedAsset(DesktopAssetManager.java:259)
	at com.jme3.asset.DesktopAssetManager.loadAsset(DesktopAssetManager.java:373)
	at com.jme3.asset.DesktopAssetManager.loadModel(DesktopAssetManager.java:416)
	at com.jme3.gde.core.assets.SpatialAssetDataObject.loadAsset(SpatialAssetDataObject.java:94)
	at com.jme3.gde.core.assets.actions.ConvertModel$1.run(ConvertModel.java:65)
	at java.lang.Thread.run(Thread.java:748)
Caused by: com.jme3.asset.AssetLoadException: Inconsistent animation sampling 
	at com.jme3.scene.plugins.gltf.TrackData.checkTimesConsistantcy(TrackData.java:139)
	at com.jme3.scene.plugins.gltf.TrackData.update(TrackData.java:130)
	at com.jme3.scene.plugins.gltf.GltfLoader.readAnimation(GltfLoader.java:805)
	at com.jme3.scene.plugins.gltf.GltfLoader.loadFromStream(GltfLoader.java:136)
	... 7 more

Which is weird since my model only uses linear interpolation. I’m going to crack open the exported gltf file and see if there’s something awry in the json of it. Some left over saying something other than linear.

thecyberbob · December 17, 2018, 11:24pm

Ah HA! There were some remnants of Cubespline in there. Friggin weird.

Going to also change the key frames instead of using location + rotation + scale to just rotation see if that sorts out the weird morphing I’m seeing.

Those 2… uhhh… wings?.. Tentacles?.. Are inverted arms. As in they morph through his body.