Blender exporter works with Skeleton animation but wrong rotation with regular objects

[giangm9]

Description of the problem

Blender 2.78, 2.79
I have a blender file with 2 skeleton animation and 2 monkeys

when i export from blender to threejs, here is the result
https://giangm9.github.io/blender3js/public/examples/anim.html
as you can see, only 1 object was exported correctly, that is the object in with original at (0, 0, 0)
The rotation of the 2 monkey also wrong
The blend file is downloadable at the top-left corner of the page
Here is the export options, i export from command line

{'addon_version': (1, 5, 0),
 'animations': 'pose',
 'applyModifiers': True,
 'blendShapes': True,
 'bones': True,
 'cameras': True,
 'colors': True,
 'compression': None,
 'customProperties': True,
 'embedAnimation': True,
 'embedGeometry': True,
 'embedTextures': False,
 'enablePrecision': True,
 'exportTextures': True,
 'extraVertexGroups': '',
 'faceMaterials': True,
 'faces': True,
 'frameIndexAsTime': False,
 'frameStep': 1,
 'geometryType': 'geometry',
 'hierarchy': True,
 'indent': True,
 'indexType': 'Uint16Array',
 'influencesPerVertex': 2,
 'lights': True,
 'logging': 'disabled',
 'maps': True,
 'materials': True,
 'mixColors': True,
 'morphTargets': False,
 'normals': True,
 'precision': 6,
 'scale': 1.0,
 'scene': True,
 'skinning': True,
 'textureFolder': 'tests/blend/textures',
 'tracks': True,
 'uvs': True,
 'vertices': True}

Three.js version

• Dev
• r90
• ...

Browser

• All of them
• Chrome
• Firefox
• Internet Explorer

OS

• All of them
• Windows
• macOS
• Linux
• Android
• iOS

Hardware Requirements (graphics card, VR Device, ...)

None

[donmccurdy]

This is likely a bug in the exporter, but FWIW I'm working on updates to the glTF Blender Exporter to support multiple animations. If you want to try the experimental version there with THREE.GLTFLoader, it should just work:

Oops, i see the skinning is broken... well anyway, when that PR is merged and not WIP maybe it will work. 😅

anim.zip

[donmccurdy]

If I give each bone a unique name, I get better results, but still broken...

[giangm9]

I think the problem with the skeleton animation is: In blender, the Mesh is the child of the skeleton, but in threejs, the skeleton is the child, but the location of the Mesh is relative to its parent, so that the location of the mesh is at (0, 0, 0)

[Mugen87]

The JSON Blender exporter has been removed with R93 (#14117).

Also see: https://threejs.org/docs/#manual/introduction/Loading-3D-models