Gltf.scene.traverse => Property 'isMesh' does not exist on type 'Object3D'

Questions
1

Hi!
I have a project in Typescript (Angular) that load a simple gltf.
Everything works fine except when I try to use of RoughnessMipmapper, by traversing the gltf’s scene.

Does anyone have an idea?

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although ‘child’ is a THREE.Object3D…
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2

Unfortunately, three.js’ isFoo properties are difficult to use with TypeScript, just due to the nature of the type checking. Two workarounds you could use:

  1. if ((child as Mesh).isMesh) { ... }
  2. if (child instanceof Mesh) { ... }

For certain classes instanceof is not helpful (e.g. InterleavedBufferAttribute is not a subclass of BufferAttribute) but for this case it’s fine.

3 Likes
3

It works :+1:
Thanks a lot @donmccurdy

1 Like
4

i’m stuck again :hugs:

this time with OrbitControls

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image854×137 7.89 KB

5

ok my bad…

it has to be : this.controls.target

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