Why Transform is used over Unreal's FTransform?

[realvictorprm]

Looking into the implementation of the recently added AddInstances I noticed that we have to copy the whole array because the Transforms need to be converted to be of type FTransform. Why aren't these used by default and would it be ok to add an additional API layer which makes use of these instead of Transform? I'm not a big fan of copying over 10k instances in some circumstances 😖

[nxrighthere]

It's necessary to use custom abstractions to avoid headaches with memory layout across different platforms between native and managed code. It also makes extending and upgrading easier without modifying the source code of the engine.

In general, it's hard to avoid memory copying in interoperability when you want to keep code safe and maintainable for the end-user.

[realvictorprm]

Thanks for the insight, that makes sense 🤔