Export classes from src/three/plugins/gltf/metadata/classes for external use

[yy923683900]

Description

Currently, the classes located in the src/three/plugins/gltf/metadata/classes folder are not exported and therefore are not accessible for use in external projects. I want to use these classes in my own project, but as they are not exported, I am unable to import them.

Solution

Please export the classes defined in src/three/plugins/gltf/metadata/classes so that they can be imported and used in other codebases. This could be achieved by adding appropriate export statements in an index file or individual class files and ensuring they are part of the package's public API.

Alternatives

As an alternative, I considered copying the class code into my own project, but this approach is not ideal because it fragments maintenance and updates. Another workaround would require direct modifications in the local node_modules, which is not sustainable.

Additional context

Making these classes available for import would help external developers leverage the existing logic and promote reuse.

[gkjohnson]

Hello! Can you explain how you're using these classes? They're designed specifically for use with GLTF-loaded models so it's not clear to me how they can be used outside of that.

[yy923683900]

Hello,Thank you for your reply!Due to performance requirements, I have written a GLTF LOADER to replace the default threejs gltf loader used in GLTFExtensionsPlugin. However, in order to support the MeshFeatures and StructuralMetaData extension functions, I would like to reuse these two classes in my loader. Therefore, I hope you can export them in the code.

[gkjohnson]

Out of curiosity what kind of performance issues are you running in to? I would recommend making an issue at the three.js repository if it's something that can be fixed.

We can expose the classes if you'd like to make a PR, though bear in mind that the class interfaces may change in the future.

[yy923683900]

Hello, I have submitted a pull request (PR) for this issue. Could you please review it for me? Thank you
#1471