Exporting forge viewer scene to GLTF

Question

I am trying to convert some isolated elements on forge viewer to GLTF I have included this script

<script src="https://unpkg.com/three@0.126.0/examples/js/exporters/GLTFExporter.js"></script>

I am using this code to export to GLTF

const exporter=new THREE.GLTFExporter()
const exportGLTF = () => {
  var scene = viewer.impl.scene
  exporter.parse( scene, function ( gltf ) {
    const output = JSON.stringify( gltf, null, 2 );
    console.log(output)    
    //saveString( output, 'scene.gltf' );
  }, {trs: true} );
}

but unfortunately I receive empty GLTF output like this

{
  "asset": {
    "version": "2.0",
    "generator": "THREE.GLTFExporter"
  },
  "scenes": [
    {}
  ],
  "scene": 0
}

Answer 1

I am not sure it's possible to extract the Forge scene with ThreeJS exporters.

If you want to extract your Forge model into glTF format, one of the best way (as of today) is to use the Forge Convert Utils package.