glTF `.import` files include slice information for 256 slices, if any animation options are set

[jtnicholl]

Godot version

v4.0.beta.custom_build [98da707]

System information

Fedora 36

Issue description

If any options are changed for animation imports, such as changing the loop mode or saving to file, without setting up slicing, Godot adds empty slice data to .import files. It lists empty slice information for 256 slices, generating seven lines for each. This results in .import files that are megabytes in size and needlessly difficult to version control.

Steps to reproduce

1. Add a glTF file with animations to a project
2. In the advanced scene importer, change the loop mode of one of the animations or set it to save to file (without enabling slicing)
3. The .import file now contains

"slice_1/end_frame": 0,
"slice_1/loop_mode": 0,
"slice_1/name": "",
"slice_1/save_to_file/enabled": false,
"slice_1/save_to_file/keep_custom_tracks": false,
"slice_1/save_to_file/path": "",
"slice_1/start_frame": 0,
. . .

repeated 256 times. On an animation library with a decent number of animations, this makes the file several megabytes.

Minimal reproduction project

AnimationSlices.zip
The .import file in this project is 57.6 kilobytes, before enabling looping on its animation it was only 659 bytes.

[fire]

@TokageItLab

[TokageItLab]

I have never used slices, but I am also having trouble with large .import folders (maybe caused by Animation? AnimationLibrary?). I think it needs to be fixed.

Unfortunately, I am not much familiar with the .import system. Does anyone have more knowledge about this? @reduz?

[jtnicholl]

Does anyone have more knowledge about this?

The slicing feature was added by @Juankz, in #40274, if we're pinging people.

[TokageItLab]

Ah I checked my project and it seems that the .import bloat problem depends on ShaderCache, I am not so sure about the slice feature. Yes, let's discuss about the slice feature in here.

[jtnicholl]

This is about the .import files, located alongside their associated resources, which are where the settings from the import tab and advanced scene importer are stored. The .import/ (3.x) and .godot/imported/ (4.0) folders aren't relevant to this.

[TokageItLab]

This is about the .import files

The .import/ (3.x) and .godot/imported/ (4.0) folders aren't relevant to this.

Yes I see, sorry I was misunderstood.

[Juankz]

Checking