gltf model load uncompleted in latest version

[moxuanzhu]

I have a gltf load uncompleted in latest verison, thr url cesium demo, but in blender or gltf viewer can show completely, this is my file eve.zip

[ggetz]

@lilleyse or @ptrgags would you please take a look at this model and see what about it leads it to partially load?

[lilleyse]

@ptrgags I can take a first pass here

[ptrgags]

@lilleyse ah okay, thanks!

I did pass the model through the validator, there were a number of warnings including one about the skinned mesh

[moxuanzhu]

@ptrgags thanks, but why in other webgl engine,the gltf can show correctly, in gltf viewer, it show

[moxuanzhu]

@ggetz Do you know the reason for this issue? thanks!

[javagl]

Some triaging, with some wild guesses:

• The model seems to be exported with a rather old version of the glTF IO Plugin ("generator" : "Khronos glTF Blender I/O v1.6.16"). It may be worth a try to to update that and see whether the problem still occurs
• There seems to be ~"something unusual" in the model. The warning from the validator is a hint, but even when just importing the model in Blender and re-exporting it, the location of the 'rifle' is wrong
• This is most likely still a bug in CesiumJS (it only shows the rifle, but not the avatar). I haven't investigated the exact reason for that
• This might be releated to https://github.com/KhronosGroup/glTF-Blender-IO/issues/1626

Manually fixing the glTF is possible. The following is the glTF file (and only that), with the skinned node being a root node...

eveFixed.zip

This can be displayed in CesiumJS...

... but of course, this is only a workaround, and might not help in the long term: Iff the Blender exporter exports a valid model, then CesiumJS should be able to render it, so the actual reason for the avatar not being displayed still has to be investigated.