Implementation Details

The interaction system is built around an IInteractable interface that any object in the game can implement to be interacted with.

The character class ray casts from the player's camera and checks if it hit an object that implements IInteractable

What it does

• Displays context-fitting prompts that change based on the object type. e.g: "Read Book", "Talk to Bartender", "Inspect Lamp", etc.
• Every interactable actor implement a virtual interaction method event that is executed when the player hits the interaction button.

Code Snippet

UINTERFACE(MinimalAPI)
class UInteractable : public UInterface
{
                        
    GENERATED_BODY()
    
};
                        
class PRISTSWITHGUNS_API IInteractable
{
                        
    GENERATED_BODY()
                        
public:
    
    virtual void Interact(class ACharacter* Character) = 0;
    
    virtual FText GetInteractionText() const = 0;
    
};

Implementation Details

The book system uses a UDataTable that holds every book in the game. Each row contains the title, author's name, and a collection of pages.

The book actor class has a datatable row property for choosing which book that actor represents, and a mesh property making it easy to place different books in the level.

Code Snippet

 /***********************************************************************************
 *                                   Books Data
 *
 *      This holds the information needed to display the contents of a book
 *      Important: In order for the pages to be filled, I recommend using around
 *      360 characters for each page string.
 ***********************************************************************************/
           
USTRUCT(BlueprintType)
struct PRISTSWITHGUNS_API FBooksData : public FTableRowBase
{
    GENERATED_BODY()
           
    UPROPERTY(EditAnywhere, BlueprintReadOnly)
    FText BookName;
           
    UPROPERTY(EditAnywhere, BlueprintReadOnly)
    FText Author;
           
    // Each string should have around 360 characters, give or take
    UPROPERTY(EditAnywhere, BlueprintReadOnly)
    TArray Pages; 
    
};