getting error on missing textures

[saadatali48]

I am reading glb buffer as below
const document = await io.readBinary(model);
and getting the error below.

Error: Cannot resolve external images with binaryToJSON().
at exports.NodeIO.binaryToJSON (node_modules@gltf-transform\core\src\io\platform-io.ts:119:4)
at exports.NodeIO.readBinary (node_modules@gltf-transform\core\src\io\platform-io.ts:127:35)
at processGlbModel (src\utils\planOptions3dModels.ts:265:31)

The model (attached) has missing textures, but I want to handle this, if Textures are missing either remove them, or just ignore the missing texture error, and proceed with setting center of the model.

If this is not possible, Please highlight a way where I can remove the textures from buffer first and then proceed with readBinary() method.

await document.transform(
      // Losslessly resample animation frames.
      resample(),
      // Remove unused nodes, textures, or other data.
      prune(),
      // Remove duplicate vertex or texture data, if any.
      dedup(),
      // Compress mesh geometry with Draco.
      draco({ method: 'edgebreaker' }),
      textureCompress({
        encoder: sharp,
        codec: 'webp',
        formats: /\.(jpg|jpeg|png)$/i,
      }),
    );

    await document.transform(center({ pivot: 'below' }));
    const modelBuffer = await io.writeBinary(document);
    return modelBuffer;

Versions:

• Version: 3.0.0-alpha.0
• Environment: Node 14

The Hinkle.zip

[donmccurdy]

Hi @saadatali48! Currently missing textures are treated as an error – parsing exits, and there is no option to disable this. I think the only 'quick' workarounds would be:

• (A) extend NodeIO with a custom subclass, perhaps returning a dummy Uint8Array for missing textures
• (B) copy out the binaryToJSON implementation, which creates a plain JSONDocument object. Remove or fix any missing textures there, parse with readJSON, then continue as usual.

Longer term I'd be open to PRs providing an option on the I/O classes to handle missing textures gracefully (remove the texture? keep but ignore it in processing?) but this would require some planning and work.

[saadatali48]

For now I did the solution B,

try to read buffer io.readBinary() first, if it fails, then in catch block, handled the missing images error using (B) by setting
json.images = []