Blueprint Function Libraries

All blueprint function libraries contain static functions that can be used throughout your code. They require no instance of an object to use. Some of the notable ones are:

Name	Description	Class Name
KismetMathLibrary	Contains a variety of math functions such as vector and rotator operations, etc.	Engine.KismetMathLibrary
KismetSystemLibrary	Contains a variety of engine functions such as line tracing, debug shapes, etc.	Engine.KismetSystemLibrary
KismetStringLibrary	Contains a variety of functions that allow you to work with FStrings.	Engine.KismetStringLibrary
GameplayStatics	Contains a variety of utility functions that are related to the actual game world.	Engine.GameplayStatics

Calling

The function library class must be loaded in order to use!

Since these are static functions, you can call these directly on the class. For example:

local Math = GetClass('Engine', 'KismetMathLibrary')
local FVector = GetStruct('CoreUObject', 'Vector')

local vector = Math:Add_VectorVector(FVector(0, 0, 0), FVector(1, 2, 3))