How to use DRACOLoader with GLTFLoader in ReactJs?

Question

I have a use case in which I am trying to load a GLTF file which is compressed using DRACO-Compression. I am able to run it using plain javascript but I am facing issues integrating the loader with ReactJs.

What I am doing:

• Copying the draco library from here into my application's scope - https://github.com/mrdoob/three.js/tree/master/examples/js/libs/draco
• Copying the DRACOLoader.js from here into my application's scope - https://github.com/mrdoob/three.js/blob/master/examples/js/loaders/DRACOLoader.js
• Exporting it as a THREE.DRACOLoader Module in my application where I need it

The error I am getting - DracoDecoderModule is not defined

In my app, this is how I am importing:

  import DRACOLoader from './DRACOLoader'
  DRACOLoader.setDecoderPath('./draco/')

Answer 1

It is recommended to use https://www.gstatic.com/draco/v1/decoders/ as the decoder source directory, e.g.:

const draco = new DRACOLoader();
draco.setDecoderConfig({ type: 'js' });
draco.setDecoderPath('https://www.gstatic.com/draco/v1/decoders/');

See example https://github.com/google/draco/tree/master/javascript/example.

Answer 2

I like the answer from @marrion luaka (and upvoted it) but referencing locally.

Only changed:

dracoLoader.setDecoderPath('https://raw.githubusercontent.com/mrdoob/three.js/dev/examples/js/libs/draco/'); // use a full url path

To this:

dracoLoader.setDecoderPath( '../node_modules/three/examples/js/libs/draco/gltf/' );

Answer 3

Relative paths won't work. One way to achieve this is by either hosting your draco_wasm_wrapper.js on like aws or something like that or you could try the following:

npm i -S three // make sure you have the latest threejs package v2 and up

Import your dependencies:

import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader'
import { DRACOLoader } from 'three/examples/jsm/loaders/DRACOLoader'

Create and configue your draco loader:

const dracoLoader = new DRACOLoader();
dracoLoader.setDecoderPath('https://raw.githubusercontent.com/mrdoob/three.js/dev/examples/js/libs/draco/'); // use a full url path

Create and configure your gltf loader:

const gltf = new GLTFLoader();
gltf.setDRACOLoader(dracoLoader);

// then you can load your glb file
const glbPath = 'your glb file'
gltf.load(glbPath, function(gltf) {
  console.log(gltf)
})

Answer 4

Host the draco folder in cloud then

import DRACOLoader from './DRACOLoader';
DRACOLoader.setDecoderPath(path to hosted draco folder);

worked for me.

if you do like this,

DRACOLoader.setDecoderPath('./draco/')

then react will take it as,

DRACOLoader.setDecoderPath('localhost:3000/draco/');

so it wont work.

Answer 5

None of the above worked directly for me on [email protected] so I used:

import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader';
import { DRACOLoader } from 'three/examples/jsm/loaders/DRACOLoader';
import * as THREE from 'three';

// draco
const draco = new DRACOLoader()
draco.setDecoderPath('../node_modules/three/examples/js/libs/draco/gltf/');
draco.setDecoderConfig({ type: 'js' });
export const dracoLoader = draco;

// gltf
const gltf = new GLTFLoader();
gltf.setDRACOLoader( dracoLoader );
export const gltfLoader = gltf;

---

BONUS for those who like promises, I've also been making my loaders return promises with the following:

function promisify(loader, onProgress) {
  function promiseLoader(url) {
    return new Promise((resolve, reject) => {
      loader.load(url, resolve, onProgress, reject);
    });
  }
  return {
    originalLoader: loader,
    load: promiseLoader,
  };
}

Example usage:

import { FBXLoader } from 'three/examples/jsm/loaders/FBXLoader';

export const fbxLoader = promisify(new FBXLoader());

Then elsewhere:

import { fbxLoader } from './loaders'

fbxLoader.load('cat.fbx').then(model => {
  console.log(model)
})