InputMappingContext

Maps keyboard/gamepad keys to InputActions, with optional modifiers (deadzone, swizzle). Add to a PlayerController via AddMappingContext.

Enhanced Input system setup with Input Actions and Mapping Context

Setup: Create InputAction assets (IA_Move Axis2D, IA_Jump Digital). Create InputMappingContext (IMC_Default) mapping keys to IAs. BeginPlay: GetPlayerController → GetEnhancedInputLocalPlayerSubsystem → AddMappingContext(IMC_Default, 0). Bind: EnhancedInputAction IA_Move → Triggered pin → ActionValue → BreakVector2D → AddMovementInput.

Enhanced Input

The modern UE input system (5.0+). InputAction + InputMappingContext replace the legacy axis/action mappings.

InputAction

A reusable input definition (Jump, Attack, Look). Pure data — bind it to keys via an InputMappingContext.

AddMappingContext — add input mapping context to Enhanced Input subsystem

UEnhancedInputLocalPlayerSubsystem::AddMappingContext. Get subsystem via GetEnhancedInputLocalPlayerSubsystem.

AddMappingContext — add Enhanced Input mapping context to player

Get subsystem: GetSubsystem(UEnhancedInputLocalPlayerSubsystem, GetPlayerController(0)). Call in EventBeginPlay on the Character or PlayerController. Priority: higher number overrides lower number mappings.

Enhanced Input setup: add mapping context and bind actions in UE5

SETUP (once per project): 1. Create Input Mapping Context (IMC_Default) in content browser. 2. Create Input Actions (IA_Move, IA_Jump, IA_Look) — set Value Type. 3. In IMC_Default, map keys to each IA. IN CHARACTER EventBeginPlay: GetController → CastTo<PlayerController> → GetSubsystem(UEnhancedInputLocalPlayerSubsystem) → AddMappingContext(IMC_Default, Priority=0). IN EVENT GRAPH: Right-click → search IA_Move → 'IA_Move (EnhancedInputAction)' node appears with Triggered/Started/Completed exec outputs and 'Action Value' data output. For 2D movement: IA_Move → GetAxis2D(ActionValue) → X to AddMovementInput(GetActorRightVector, ScaleValue=X), Y to AddMovementInput(GetActorForwardVector, ScaleValue=Y).

EnableInput — allow this actor to receive input events

Must call EnableInput(GetPlayerController(0)) before BindAction/BindAxis events fire on the actor.

Enhanced Input BindAction — bind an Input Action to a Blueprint function (UE5 new input)

UE5 Enhanced Input replaces legacy BindAxis/BindAction. In BP: use 'Enhanced Action Events' category nodes (IA_ nodes appear automatically). ETriggerEvent: Started (pressed), Triggered (held), Completed (released). Input Action outputs: 'Action Value' (InputActionValue struct) and typed output.

SetInputMode UIOnly — give all input to UI (show cursor)