FBXLoader: Wrong transformation of child mesh.

[avatar-studio]

Describe the bug

When loading some fbx files, the position of the second mesh is not correct.
In all programs except Three, the bow direction is normal.
However, in three, the direction of the rod of the bow is different.

To Reproduce

Steps to reproduce the behavior:

1. Extract the attached zip file
2. run index.html
3. click 'load anim'

reduce code is below
001_fbx_load.zip

Code

// for load character
let loaded = await fbxLoad('./ArcherRi01.FBX');
loaded.traverse(child=>{if(child.isMesh) child.castShadow=true;});
loaded.getObjectByProperty("type","AmbientLight").removeFromParent();
loaded.getObjectByName("body").material.map = await textureLoad('./ArcherRi01.png');
loaded.getObjectByName("weapon").material.map = await textureLoad('./ArcherRi01_W.PNG');
scene.add(loaded);

// for anim
let animMixer = undefined;
let queue = false;
document.querySelector('[name=btn-load-anim]').addEventListener("click", async ()=>{
    if( queue ) return console.warning("already loaded animation");
    queue = true;
    let loadedAnim = await fbxLoad('ArcherRi@Idle01.FBX');
    animMixer = new THREE.AnimationMixer(loaded);
    let idleAction = animMixer.clipAction(loadedAnim.animations[0]);
    idleAction.play();
});

Live example

nothing

Expected behavior

Problems persist with animation

Screenshots

in other program

in three.js

Platform:

• Device: [Desktop, Mobile]
• OS: [Windows, MacOS, Linux, Android, iOS]
• Browser: [Chrome, Firefox, Safari, Edge]
• Three.js version: [dev, r???]

[Mugen87]

I can reproduce. It works in Blender but not with the current FBXLoader. While testing with another website, I've realized that the model can be correctly loaded with older versions of three.js. It seems to work up to r96:

https://raw.githack.com/mrdoob/three.js/r96/editor/index.html

[Mugen87]

#14933 landed in r97. Maybe a side effect of this change...

[avatar-studio]

Hello.
I tried loading the fbx file in r96.
well displayed.
Did you find the cause of the error?

[Mugen87]

No sorry, I'm not familiar with the details of FBXLoader.

[DVLP]

At some point I partially fixed rotation inheritance. Here's where I stopped leaving some clues behind #20932 (comment)

[DVLP]

While trying to debug something else I came back to this issue again and it looks like everything is imported correctly.
On the bow (model "weapon" which is a SkinnedMesh) there's a -175 deg rotation in Z axis present, the matrix is updated correctly but this transformation has no effect on the mesh. Zeroing the Z rotation of the bow in 3dsmax makes the bow look like in Three. Changing it to any value in Three.js, and updating the matrix has no effect, it always looks like with rotation 0,0,0.

The issue is that transforms on SkinnedMesh type are being completely ignored in Three.js as skinning is happening in the world space #4812 #24479
Other programs apply the transforms so this looks like something that needs implementing at some point.