增强输入

在.h文件中写：

# include "InputActionValue.h"

// 映射
UPROPERTY(EditAnywhere, BlueprintReadOnly, Category="Input", meta=(AllowPrivateAccess = "true"))
class UInputMappingContext* DefaultMappingContext;

// 移动
UPROPERTY(EditAnywhere, BlueprintReadOnly, Category="Input", meta=(AllowPrivateAccess = "true"))
class UInputAction* MoveAction;

UPROPERTY(EditAnywhere, BlueprintReadOnly, Category="Input", meta=(AllowPrivateAccess = "true"))
class UInputAction* LookAction;

protected:
  void Move(const FInputActionValue& value);
  void Look(const FInputActionValue& value);

在.cpp文件中写：

#include "GameFramework/CharacterMovementComponent.h"
#include "EnhancedInputComponent.h"
#include "EnhancedInputSubSystems.h"

GetCharacterMovement()->bOrientRotationToMovement = true;
GetCharacterMovement()->RotationRate = FRotator(0.f, 500.f, 0.f);
GetCharacterMovement()->MaxWalkSpeed = 500.f;
GetCharacterMovement()->MinAnalogWalkSpeed = 20.f;
GetCharacterMovement()->BreakingDecelerationWalking = 2000.f;

void AMyCharacter::BeginPlay()
{
	Super::BeginPlay();
	
  if(APlayerController* PlayerController = Cast<APlayerController>(Controller))
  {
    if(UEnhancedInputLocalPlayerSubsystem* Subsystem = ULocalPlayer::GetSubsystem<UEnhancedInputLocalPlayerSubsystem>(PlayerController->GetLocalPlayer()))
    {
      Subsystem->AddMappingContext(DefaultMappingContext, 0);
    }
  }
}

void AMyCharacter::Move(const FInputActionValue& value)
{
  FVector2D MovementVector = value.Get<FVector2D>();
  if(Controller != nullptr){
    const FRotator Rotation = Controller->GetControlRotation();
    const FRotator YawRotation(0, Rotation.Yaw, 0);

    const FVector ForwardDirection = FRotationMatrix(YawRotation).GetUnitAxis(EAxis::X);
    const FVector RightDirection = FRotationMatrix(YawRotation).GetUnitAxis(EAxis::Y);

    AddMovementInput(ForwardDirection, MovementVector.Y);
    AddMovementInput(RightDirection, MovementVector.X);
  }
}

void AMyCharacter::Look(const FInputActionValue& value)
{
  FVector2D LookAxisVector = value.Get<FVector2D>();
  if(Controller != nullptr)
  {
    AddControllerYawInput(LookAxisVector.X);
    AddControllerPitchInput(LookAxisVector.Y);
  }
}

void AMyCharacter::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{
	Super::SetupPlayerInputComponent(PlayerInputComponent);

  if(UEnhancedInputComponent* EnhancedInputComponent = CastChecked<UEnhancedInputComponent>(PlayerInputComponent))
  {
    EnhancedInputComponent->BindAction(MoveAction, ETriggerEvent::Triggered, this, &AMyCharacter::Move);
    EnhancedInputComponent->BindAction(LookAction, ETriggerEvent::Triggered, this, &AMyCharacter::Look);
  }
}