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# Objective `MeshVertexAttributeId` is currently a wrapper type around a `usize`. Application developers are exposed to the `usize` whenever they need to define a new custom vertex attribute, which requires them to generate a random `usize` ID to avoid clashes with any other custom vertex attributes in the same application. As the range of a `usize` is platform dependent, developers on 64-bit machines may inadvertently generate random values which will fail to compile for a 32-bit target. The use of a `usize` here encourages non-portable behaviour and should be replaced with a fixed width type. ## Solution In this PR I have changed the ID type from `usize` to `u64`, but equally a `u32` could be used at the risk of breaking some extant non-portable programs and increasing the chance of an ID collision. |
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Bevy Render
