USubsystem

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Subsystems are auto instanced classes that share the lifetime of certain engine constructs Currently supported Subsystem lifetimes are: Engine -> inherit UEngineSubsystem Editor -> inherit UEditorSubsystem GameInstance -> inherit UGameInstanceSubsystem World -> inherit UWorldSubsystem LocalPlayer -> inherit ULocalPlayerSubsystem

Normal Example: class UMySystem : public UGameInstanceSubsystem Which can be accessed by: UGameInstance* GameInstance = ...; UMySystem* MySystem = GameInstance->GetSubsystem();

or the following if you need protection from a null GameInstance UGameInstance* GameInstance = ...; UMyGameSubsystem* MySubsystem = UGameInstance::GetSubsystem(GameInstance);

You can get also define interfaces that can have multiple implementations. Interface Example : MySystemInterface With 2 concrete derivative classes: MyA : public MySystemInterface MyB : public MySystemInterface

Which can be accessed by: UGameInstance* GameInstance = ...; const TArray& MySubsystems = GameInstance->GetSubsystemArray();

Syntax

UCLASS (Abstract, MinimalAPI)  
class USubsystem : public UObject  
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UCLASS (Abstract, MinimalAPI) class USubsystem : public UObject

Inheritance Hierarchy

• UObjectBase → UObjectBaseUtility → UObject → USubsystem

Derived Classes

USubsystem derived class hierarchy

• UDynamicSubsystem
• UWorldSubsystem
• UGameInstanceSubsystem
• ULocalPlayerSubsystem
• UVCamSubsystem

Variables

Protected

Functions