I had help from google, it kept sending me here while trying to solve “find angle between two vectors”. I am thinking, there wasn’t help enough since 2016, but google thinks its important, maybe it’ll benefit others.
I am working in the blueprint event graph. Maybe that’s important.
I tried “ArcCosone” did you mean ArcCosine?..neither are a node or a thing in my 2021 version, was 2020 important? Also, acosd(A B), doesn’t return a value when is negative.
In mine, I have to handle edge cases with asin too. 's return value can’t be >1 or <-1. Clamp those or asine won’t return a value. Also if 180 degrees apart, the cross product will be 0 length. might cause problems.
All the best