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DRACOLoader: Implement data alignment for WebGPU #31991

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DRACOLoader: Implement data alignment for WebGPU #31991

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@donmccurdy donmccurdy mentioned this pull request Oct 1, 2025
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@donmccurdy donmccurdy marked this pull request as ready for review October 3, 2025 21:39
@donmccurdy donmccurdy added this to the r182 milestone Oct 3, 2025
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Ok, I think this is ready for review. Let's merge after r181, releasing with r182.

One note. With this change, when GLTFLoader sees Draco-compressed .glb files with KHR_mesh_quantization (currently I don't think most Draco encoders add this) it will handle the required data alignment by returning InterleavedBufferAttributes in the decoded geometry Each attribute will have its own dedicated InterleavedBuffer, we don't interleave the attributes at runtime. If the .glb uses Draco but not KHR_mesh_quantization, then nothing changes.

@donmccurdy donmccurdy mentioned this pull request Oct 4, 2025
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WebGPU + Draco + KHR_mesh_quantization
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