Stress test with official Blender Demo files

Describe the bug

The Blender Foundation hosts a couple of official demo files on their website. It would be great if all/most/some of those could be exported as expected without errors.

Those files are quite sophisticated, so it would be a good stress test. I’m also aware that not all features/aspects of a model can be exported (e.g. materials not using the principled BRDF shader).

To Reproduce

I’m gonna give steps for one particular file, the “Hi, my name is Amy” file:

1. Go to this web page and click the “Download” button to load the 220 MB file
2. Open said file with Blender
3. Try to export a glTF file (I tried both the entire scene or just the head mesh)
4. See error

Python: Traceback (most recent call last):
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/__init__.py", line 626, in execute
    return gltf2_blender_export.save(context, export_settings)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_export.py", line 46, in save
    json, buffer = __export(export_settings)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_export.py", line 63, in __export
    __gather_gltf(exporter, export_settings)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_export.py", line 75, in __gather_gltf
    active_scene_idx, scenes, animations = gltf2_blender_gather.gather_gltf2(export_settings)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather.py", line 39, in gather_gltf2
    animations += __gather_animations(blender_scene, export_settings)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather.py", line 83, in __gather_animations
    animations_, merged_tracks = gltf2_blender_gather_animations.gather_animations(_blender_object, merged_tracks, len(animations), export_settings)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_animations.py", line 76, in gather_animations
    animation = __gather_animation(blender_action, blender_object, export_settings)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_animations.py", line 114, in __gather_animation
    channels=__gather_channels(blender_action, blender_object, export_settings),
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_animations.py", line 149, in __gather_channels
    return gltf2_blender_gather_animation_channels.gather_animation_channels(
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_cache.py", line 65, in wrapper_cached
    result = func(*args)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_channels.py", line 74, in gather_animation_channels
    channel = __gather_animation_channel(
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_channels.py", line 202, in __gather_animation_channel
    sampler=__gather_sampler(channels, blender_object, export_settings, bake_bone, bake_channel, bake_range_start, bake_range_end, action_name, driver_obj),
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_channels.py", line 254, in __gather_sampler
    return gltf2_blender_gather_animation_samplers.gather_animation_sampler(
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_cache.py", line 65, in wrapper_cached
    result = func(*args)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_samplers.py", line 67, in gather_animation_sampler
    input=__gather_input(channels, blender_object_if_armature, non_keyed_values,
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_cache.py", line 65, in wrapper_cached
    result = func(*args)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_samplers.py", line 235, in __gather_input
    keyframes = gltf2_blender_gather_animation_sampler_keyframes.gather_keyframes(blender_object_if_armature,
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_cache.py", line 65, in wrapper_cached
    result = func(*args)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_sampler_keyframes.py", line 231, in gather_keyframes
    mat = get_bone_matrix(
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_cache.py", line 90, in wrapper_bonecache
    result = func(*args)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_sampler_keyframes.py", line 177, in get_bone_matrix
    drivers_to_manage = get_sk_drivers(obj_driver)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_cache.py", line 117, in wrapper_skdriverdiscover
    result = func(*args)
  File "/Applications/Blender.app/Contents/Resources/2.93/scripts/addons/io_scene_gltf2/blender/exp/gltf2_blender_gather_drivers.py", line 55, in get_sk_drivers
    idx = shapekeys_idx[sk_name]
KeyError: 'XZ_Wrist_Up.L'

Expected behavior A valid glTF file that can be loaded by reference viewers

Screenshots

Version

• OS: macOS 11.4
• Blender Version 2.93 / glTF-Blender-IO 1.6.16

Thanks!

[julienduroure]

A complete refactoring (for better collection instance management) is in progress in #1378 I will test this file with the #1378 branch

[julienduroure]

Can you please test with blender 3.0 alpha / master ? This is probably #1415 , so already fixed.