Issue with Loading OBJ File using OBJLoader in React Native

[narohan]

I encountered an issue while using the OBJLoader library from Three.js to load an OBJ file in a React Native application. I placed the OBJ file in the assets directory of my React Native project and I'm trying to load it using useLoader from the @react-three/fiber/native library.

I get the following error: Error: Could not load 2: text.indexOf is not a function (it is undefined) which comes from the line const obj = useLoader(OBJLoader, require('./assets/tableau.obj'));

My code :

import { Suspense } from 'react';
import { Canvas, useLoader } from '@react-three/fiber/native';
import { OBJLoader } from 'three/examples/jsm/loaders/OBJLoader';

function Box() {

  const obj = useLoader(OBJLoader, require('./assets/tableau.obj'));

  return <primitive object={obj} scale={10} />
}

export default function App() {


  return (
    <Canvas>
      <ambientLight />
      <pointLight position={[1, 1, 1]} />
      <Suspense fallback={null}>
        <Box />
      </Suspense>
    </Canvas>

  );
}

node v21.1.0
"@react-three/fiber": "^8.15.9",
"@types/three": "^0.158.1",
"expo": "~49.0.15",
"expo-file-system": "~15.4.4",
"expo-gl": "~13.0.1",
"expo-status-bar": "~1.6.0",
"expo-three": "^7.0.0",
"react": "18.2.0",
"react-native": "0.72.6",
"three": "^0.158.0"

[CodyJasonBennett]

Seems that loaders internally are not creating the correct response type. The following is what #3086 should do:

function Box() {
  const buffer = useLoader(THREE.FileLoader, require('./assets/tableau.obj'));
  const obj = useMemo(() => new OBJLoader().parse(THREE.LoaderUtils.decodeText(buffer)), [buffer])
  return <primitive object={obj} scale={10} />
}

[narohan]

I have another error with this code,
TypeError: OBJLoader.OBJLoader.parse is not a function (it is undefined)

More informations :
require('./assets/tableau.obj') return a number 1
const buffer = useLoader(THREE.FileLoader, require('./assets/table.obj')); return a empty array
THREE.LoaderUtils.decodeText(buffer) logically returns an empty string

[sicnarf14sf]

Hi, has this been solved already? I'm having the same issues with you. Please let me know if that has been resolved already. Thanks!

[sicnarf14sf]

Hello?

[CodyJasonBennett]

I have a workaround you can try in #3085 (comment).

function Box() {
  const buffer = useLoader(THREE.FileLoader, require('./assets/tableau.obj'));
  const obj = useMemo(() => new OBJLoader().parse(THREE.LoaderUtils.decodeText(buffer)), [buffer])
  return <primitive object={obj} scale={10} />
}

I also have a PR that would fix this issue, but it needs better integration testing since I'm already seeing fail cases with GLTFLoader.

{
  "dependencies": {
    "@react-three/fiber": "https://pkg.csb.dev/pmndrs/react-three-fiber/commit/a689a1f9/@react-three/fiber"
  }
}

[sicnarf14sf]

Thanks!

[expolli]

Was able to use obj assets with this snippet:

const obj = useLoader( OBJLoader, Asset.fromModule(require("./assets/Airmax/shoe.obj")).uri )

Hope it works for you too.

[Tricho340]

Was able to use obj assets with this snippet:

const obj = useLoader( OBJLoader, Asset.fromModule(require("./assets/Airmax/shoe.obj")).uri )

Hope it works for you too.

actually worked for me.

[anurbecirovic]

I have the same issue now. But the code from @expolli didn't work :(. Any suggestions ?
import { Asset } from 'expo-asset'
import { OBJLoader } from 'three/examples/jsm/loaders/OBJLoader'

function Island() { const obj = useLoader( OBJLoader, Asset.fromModule(require("../assets/shoe.obj")).uri ) return <primitive object={obj} scale={10} /> }

const Home = ({ route }) => { return ( <Canvas> <ambientLight /> <pointLight position={[1, 1, 1]} /> <Suspense fallback={<View />}> <Island /> </Suspense> </Canvas> ) }
Any help would be awesome ! 🙏

[CodyJasonBennett]

What is the issue exactly? Do neither of these work also? I'll look into getting #3086 out, but it may not be enough on its own.

// https://github.com/pmndrs/react-three-fiber/issues/3085#issuecomment-1837583297
function A() {
  const buffer = useLoader(THREE.FileLoader, require('./assets/tableau.obj'));
  const obj = useMemo(() => new OBJLoader().parse(THREE.LoaderUtils.decodeText(buffer)), [buffer])
  return <primitive object={obj} scale={10} />
}

// Likely indicates a deeper regression since the start of the thread
// https://github.com/pmndrs/react-three-fiber/issues/3085#issuecomment-1925877969
import { Asset } from 'expo-asset'
function B() {
  const buffer = useLoader(THREE.FileLoader, Asset.fromModule(require('./assets/Airmax/shoe.obj')).uri);
  const obj = useMemo(() => new OBJLoader().parse(THREE.LoaderUtils.decodeText(buffer)), [buffer])
  return <primitive object={obj} scale={10} />
}

[anurbe]

Do you know will this work also if you want to add the material / load a material ?

function A() {
const buffer = useLoader(THREE.FileLoader, require('./assets/tableau.obj'));
const obj = useMemo(() => new OBJLoader().parse(THREE.LoaderUtils.decodeText(buffer)), [buffer])
return
}

Looks like this example works. Thank you @CodyJasonBennett

[CodyJasonBennett]

That example should work until #3086 is merged which lets the normal useLoader path for OBJLoader work again. Currently, loader internals return an ArrayBuffer due to how they are polyfilled instead of also a string which OBJLoader expects. GLTFLoader and more modern loaders already work OOTB.