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KhronosGroup / glTF-Blender-IO

Blender glTF 2.0 importer and exporter
https://docs.blender.org/manual/en/latest/addons/import_export/scene_gltf2.html
Apache License 2.0
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Multi rig support #189

Closed jakob-leue closed 1 year ago

jakob-leue commented 5 years ago

Hello,

it seems like multiple rigs aren't supported yet? During this year, I tried to export multiple objects that are rigged (two characters eg) into .glTF, but always stumbling into issues. Trying out different settings, at the moment I'm in a status where only one action/rig works in the viewer/importer - the other rigs are ignored. I'm testing my exported scenes in the donmccurdy viewer - so do you think it's something exporter related or is it more an issue of three.js? Until now, I wasn't able to find a related issue yet, so thanks in advance and best regards. multirigscene

donmccurdy commented 5 years ago

This sounds like https://github.com/KhronosGroup/glTF-Blender-Exporter/issues/232 – the exporter can only handle one rig per scene currently. Multiple actions are supported though.

donmccurdy commented 5 years ago

Could you check on https://github.com/KhronosGroup/glTF-Blender-IO in Blender 2.8 as well, and if the problem recurs, attach a .blend file to help us reproduce the issue?

jakob-leue commented 5 years ago

The multiple action support works out phantastic for me. So I hotfixed it by converting the rig animation into morph targets, but would be supper handy to have it in the future. I also checked it on the 2.8 beta - exporting multiple rigs there causes weird mesh distortion when the animation is played as well as an offset in rotation as it seems. But I had no time investigate that further yet. I'll attach the .blend as well as the .gltf files I exported from 2.79 and 2.8. Thank you for your support!

multiRig Files.zip

donmccurdy commented 5 years ago

Confirmed this bug is occurring in latest version of Blender 2.8 and glTF-Blender-IO, so I'm transferring this issue to that repository.

tested on https://sandbox.babylonjs.com/

(this model exports with duplicate bone names, so testing in three.js is currently problematic)

julienduroure commented 5 years ago

Can you please retest it?

donmccurdy commented 4 years ago

Result attached: multiRigUnfold.glb.zip

The skins and animations are there, it looks like, but they don't play back the same way if you just play each animation simultaneously, as a viewer like mine will do... not sure if that can be fixed in the .blend, or if it requires support for timing of strips within NLA tracks...