Make adding a subasset label return a result for if there is a duplicate label. #18013
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pcwalton
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Currently, we reload a glTF skin each time we encounter a node that references it. By checking for duplicates, PR bevyengine#18013 turned this into a fatal error. But this was always wasteful. This commit fixes the issue by caching each skin by its index as we load it. The Maya babylon.js export plugin likes to emit glTFs with multiple nodes that reference the same skin, so this effectively unbreaks Maya rigs.
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Currently, we reload a glTF skin each time we encounter a node that references it. By checking for duplicates, PR #18013 turned this into a fatal error. But this was always wasteful. This commit fixes the issue by caching each skin by its index as we load it. The Maya babylon.js export plugin likes to emit glTFs with multiple nodes that reference the same skin, so this effectively unbreaks Maya rigs.
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Objective
Solution
LoadContext::add_labeled_assetand friends return an error if it finds a duplicate asset.Testing
Migration Guide
AssetLoaders must now handle the case of a duplicate subasset label when usingLoadContext::add_labeled_assetand its variants. If you know your subasset labels are unique by construction (e.g., they include an index number), you can simply unwrap this result.