Can imported model's child be scaled individually?

Questions
1

Hey, I’m having some trouble scaling a child mesh. Details are:

  • I imported some fbx models into blender, made a small scene and exported it as a single gltf
  • Loaded the scene gltf into threejs
  • Using getObjectByName I found a child of the scene
  • Then tried to scale it

The scale property of the child mesh was changed to my new value, but does not appear any different.

Is what I’m tying possible - can child meshes of imported models be scaled individually?

2

The steps you’re describing should work, perhaps unless the object is a THREE.SkinnedMesh. In that case the scale is bound to the skeleton. If it’s not a SkinnedMesh, and still not working, it might be helpful to see a demo or the model.

3

Thanks for replying so quickly!

I haven’t made it into a skinned mesh - just using the gltf loader and throwing the loaded gltf.scene into a map of THREE.Object3D to later put in the scene.

Repo:

Loader:

Usage:

Anything there look dubious?

4

Some follow up information:

  • When I load the gltf, I’m traversing the children in order to cast/receive shadows.
  • There, I find a match by name on the child and set the scale, which works.
  • I then put a ref to that child mesh into my map of loaded object3ds
  • Later, when I get that from the map and change the scale - nothing affects it
gltfLoader.load(sceneUrl, (gltf) => {
     // Traverse the gltf scene
     gltf.scene.traverse((child) => {
       const node = child as THREE.Mesh;
       if (node.isMesh) {
         // Shadows
         node.castShadow = true;
         node.receiveShadow = true;
       }

       if (node.name === "SM_Prop_Candle_Flame_01") {
         this.models.set("sconce-left-flame", node);
         node.scale.y = 20; // <-- This works
       }
     });
});

Later:

    const sconceLeftFlame =
      this.gameLoader.modelLoader.get("sconce-left-flame");
    if (sconceLeftFlame) {
      sconceLeftFlame.scale.y = 1;
      // This reads '1' for scale.y, but it still appears stretched in the scene 
      console.log("flame", sconceLeftFlame.scale);
}

I feel like I’m missing something obvious here. I could just import the items I want to scale individually, but I’d rather not do that since it’s a lot of extra work for the number of items I’ll need to interact with.

5

Is it possible you have animation playing that might override the object’s scale?

6

None, and to be certain I made sure to untick all the animation/skinning options when exporting from blender.

It’s totally weird - esp that I can scale when traversing but not later.

This may or may not be useful, but I noticed that when scaling on the y, it actually appears to scale on the x axis in three. This might be a side effect of coming from blender where z is up though.