Guide on transforming OBJ/FBX files into GLTF format prior to adding them to your scene with Threejs

Currently, I am working on developing a web application that allows users to upload obj/fbx files and view them directly in the browser. The utilization of OBJLoader and FBXLoader provided by Threejs has been successful so far. However, I have a specific requirement where I need to convert both of these models to GTLF format before loading them into the scene to maintain consistency.

My challenge now is how to accomplish this task using Threejs. I am aware that Threejs comes with a GTLF exporter, but I am unsure of the steps needed to integrate it seamlessly into my project for this particular purpose.

javascriptthree.js3dfbxgltf

Answer №1

If you're looking to convert OBJ or FBX files to glTF, there are a couple of methods you can consider:

Option 1:

  • Utilize native libraries like obj2gltf and fbx2gltf to convert the files on your server.
  • Then, simply load the converted glTF file on your web app.

Option 2:

  • Load the OBJ or FBX files using OBJLoader or FBXLoader to get a THREE.Mesh or similar object.
  • Convert that THREE.Mesh into a glTF file using GLTFExporter.
  • Finally, load the newly converted glTF file using GLTFLoader to obtain a THREE.Mesh or equivalent object once again.

While Option 1 may be more challenging, it could potentially yield better conversion results due to the access to FBX SDK provided by native libraries. On the other hand, Option 2 is simpler, but it may not offer any significant advantages as the resulting Mesh after loading the OBJ or FBX files would be the same. There is also a possibility of encountering performance or accuracy issues when performing the roundtrip through GLTFExporter to GLTFLoader.

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