Decadence — UE5 Gameplay Demo (C++)

A vertical slice of a horror game with fixed cameras showcasing production-grade Unreal Engine 5 C++: async asset streaming with stale-load guards, interface-driven interaction, CommonUI-backed static-camera framing, and strict ownership semantics throughout.

Stack

Unreal Engine 5 · C++ · CommonUI · Enhanced Input · UMG · GameplayTags · Streamable Manager

Gameplay Systems · Editor Tools · CI/CD Pipeline · Procedural Content Generation · Gameplay Message Runtime

Highlights

• Async, memory-safe item loading. UItemData (a UPrimaryDataAsset) holds mesh, material, and input action as TSoftObjectPtr; AInteractableItem streams them via FStreamableHandle, guarding against stale completions with an ExpectedAssetName token and cancelling pending loads in BeginDestroy.

• Abstracted Interaction system. IInteractableInterface exposes AllowInteraction / DenyInteraction / Interact as BlueprintNativeEvents, fully decoupling the player from concrete item types and allowing extension from either C++ or Blueprint.

• Data-driven item management. Items are defined entirely by UItemData assets — no hardcoded content — and the FOnInteractionAllowed delegate broadcasts an FDataTableRowHandle so designers author input prompts in a DataTable with zero C++ changes.

• Modern smart pointers. TObjectPtr for owned UPROPERTY refs, TWeakObjectPtr for non-owning observers (CurrentInteractable, cached UEnhancedInputComponent), TSoftObjectPtr for deferred content, TSharedPtr<FStreamableHandle> for streaming lifetimes — zero raw new/delete.

• Abstract base + specialization. ADecadentCharacterBase is UCLASS(Abstract); ADecadentPlayerCharacter and ADecadenceEnemyCharacter specialize it — shared behavior in one place, base class never instantiable.

• Enhanced Input, bound in C++. Player caches FEnhancedInputActionEventBinding for the interact action so bindings tear down cleanly across possession changes instead of leaking.

• CommonUI static-camera system. AStaticCameraTrigger (box volume + ACameraActor + configurable EViewTargetBlendFunction) drives UStaticCameraManagerComponent, which fires typed multicast delegates carrying TSubclassOf<UCommonActivatableWidget> — the widget stack owns its lifecycle, the component only signals intent.

Tooling

Click the thumbnail below to watch the tooling walkthrough on YouTube.

Note: No AI tool was used for the development of the code. AI tools were only used as a research tool to dive into technical functionalities, identify possible bug causes, and write documentation.

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© Gabriel Borges. All rights reserved — contact for licensing.