VinterpTo

The implementation is in UnrealMath.cpp (FMath::VInterpTo)

I’m not quite grokking what you’re aiming to do, but what I was talking about with my usual implementation is a simple ‘count down’ type of timer or some variation of it. It would count down every tick from the duration I want and I’d normalize it (between 0…1). Sometimes I pass it into FMath::InterpEaseInOut functions as the alpha, depending on the smoothing requirements.