a66bdd074f
fix #12344 use existing machinery in track_assets to determine if the asset is unused before firing Asset::Unused event ~~most extract functions use `AssetEvent::Removed` to schedule deletion of render world resources. `RenderAssetPlugin` was using `AssetEvent::Unused` instead. `Unused` fires when the last strong handle is dropped, even if a new one is created. `Removed` only fires when a new one is not created. as far as i can see, `Unused` is the same as `Removed` except for this "feature", and that it also fires early if all handles for a loading asset are dropped (`Removed` fires after the loading completes). note that in that case, processing based on `Loaded` won't have been done anyway. i think we should get rid of `Unused` completely, it is not currently used anywhere (except here, previously) and i think using it is probably always a mistake. i also am not sure why we keep loading assets that have been dropped while loading, we should probably drop the loader task as well and remove immediately.~~ |
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