RPC functions are unreliable by default. Improving UE4 Blueprint Usability with Custom Nodes The Blueprintable specifier is required if you want to allow Blueprints to implement this interface. You can also make a BlueprintReadWrite property instead of using functions. The basics of Unreal Engine's Blueprint -Beginner's Guide For all blueprint functions you create, Unreal Engine will provide you with a blueprint node to call that function. . In the case of blueprints, both functions and macros allow for local variable creation and utilization. WaapiUri: The function that will be called when an event that we would be aware of occurs. Refactoring complex Blueprint Code into separate functions in Unreal ... (not the return value), and the currently executing native function Wait. Functions have a single entry point designated by a node with the name of the Function containing a single output control flow port. Exposes the function as a node to Blueprint. . For the HTTP request you'll need the following #includes in your newly created .cpp file: and Unreal generates function inside .gen.cpp looking like this: It . First, an interface class uses the UINTERFACE macro instead of the UCLASS macro, and inherits from UInterface instead of UObject directly. Call Blueprint function from C++ and get the return value Interface. From Epic Wiki. Anatomy of the Unreal 4 blueprint virtual machine# Translated from this excellent series https: . UE Blueprints in depth part 1: Graphs, Functions, Macros and Macro ... Unreal-Engine-4-Guidebook/the-ufunction-macro.md at master · Glenn-Gray ... Writing UE Blueprint nodes in C++ | Mikelis' Game Devlog Blueprint functions with "multiple" return values are actually just C++ reference parametres to determine what the return values are. Interfaces in Unreal Engine | Unreal Engine 5.0 Documentation Functions and events have a lot in common, but the functions have two advantages. Below is a sample Blueprint script that parses the XRMotionControllerData structure to get hand joint locations and draws a debug coordinate system at each joint's location. A text-based visual programming language inspired by Unreal Engine ... One of . designers in order to create game logic on top of the code created by programmers.