Unreal Engine 4.x Scripting with C++ Cookbook - Second Edition

How to do it...

1. Create a new interface called Interactable.
2. Add the following functions to the IInteractable class declaration:

class CHAPTER_07_API IInteractable{    GENERATED_BODY()    // Add interface functions to this class. This is the class that     // will be inherited to implement this interface.public:    UFUNCTION(BlueprintNativeEvent, BlueprintCallable,               Category = Interactable)    bool CanInteract();    UFUNCTION(BlueprintNativeEvent, BlueprintCallable,               Category = Interactable)    void PerformInteract();};

3. Create a second interface, Openable.
4. Add this function to its declaration:

class CHAPTER_07_API IOpenable{  GENERATED_BODY()  // Add interface functions to this class. This is the class that  // will be inherited to implement this interface. ...