Get new vector based on angle of two vectors

[Denny]

@Gigantoad;183156

There are two types of vectors in UE4 (and probably most other engines). One is the mathematical that has only magnitude (length) and direction. This one does not have a location. You can place that same vector anywhere in space. You can picture it as an arrow pointing somewhere. Neither starting nor end point of that arrow denotes an actual location. You could call this a direction vector.

The other kind of vector is a location vector. Technically it isn’t a vector at all, it just uses FVector as a type to store X, Y, Z values in. It’s just a point in space without direction or length.

Indeed! Both types are stored in the same data type as the elements are only 2-3 floats. The magnitude is then returned by calculating the length, using sqrt(xx, yy, z*z) (Pythagoras). Square root is a relatively expensive operation, so it’s redundant to calculate and store it for all vectors, and is only calculated when needed. It’s up to us to remember what type of value we’re working with when we’re getting and setting a vector. It could be both a location and vector at the same time, depending on what we’re up to.

I hope we’re not going too off-topic Vaei. It’s just for future reference if other users end up in your thread. Good luck with your project.