[UE4 입문] 아이템 줍기

 

 

콜리전 채널과 프리셋 세팅을 우선 해준다.

 

// MyWeapon.h
protected:
	// Called when the game starts or when spawned
	virtual void BeginPlay() override;

	virtual void PostInitializeComponents() override;

private:
	UFUNCTION()
	void OnCharacterOverlap(UPrimitiveComponent* OverlappedComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);

public:
	UPROPERTY(VisibleAnywhere)
	UStaticMeshComponent* Weapon;

	UPROPERTY(VisibleAnywhere)
	class UBoxComponent* Trigger;
};

// MyWeapon.cpp
AMyWeapon::AMyWeapon()
{
 	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = false; // 무기는 Tick이 필요없다

	Weapon = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("WEAPON"));
	Trigger = CreateDefaultSubobject<UBoxComponent>(TEXT("TRIGGER"));
	
	static ConstructorHelpers::FObjectFinder<UStaticMesh> SW(TEXT("StaticMesh'/Game/ParagonGreystone/FX/Meshes/Heroes/Greystone/SM_Greystone_Blade_01.SM_Greystone_Blade_01'"));
	if (SW.Succeeded())
	{
		Weapon->SetStaticMesh(SW.Object);
	}
	
	Weapon->SetupAttachment(RootComponent);
	Trigger->SetupAttachment(Weapon); // 안하면 트리거가 따라가지 않을 수 있음

	// 만들어둔 콜리전 프리셋 설정
	Weapon->SetCollisionProfileName(TEXT("MyCollectible"));
	Trigger->SetCollisionProfileName(TEXT("MyCollectible"));
	Trigger->SetBoxExtent(FVector(30.f, 30.f, 30.f)); // 충돌 박스 생성
}

void AMyWeapon::PostInitializeComponents()
{
	Super::PostInitializeComponents();

	// 트리거 작동(충돌체크 발생)시 실행할 메소드를 콜백으로 넘겨줌
	Trigger->OnComponentBeginOverlap.AddDynamic(this, &AMyWeapon::OnCharacterOverlap);
}

void AMyWeapon::OnCharacterOverlap(UPrimitiveComponent* OverlappedComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
{
	UE_LOG(LogTemp, Log, TEXT("Overlapped"));

	AMyCharacter* MyCharacter = Cast<AMyCharacter>(OtherActor);

	if (MyCharacter)
	{
		FName WeaponSocket(TEXT("hand_l_socket"));

		// 충돌된 캐릭터(MyCharacter)의 WeaponSocket에 현재 컴포넌트를 붙여준다(MyWeapon)
		AttachToComponent(MyCharacter->GetMesh(),
			FAttachmentTransformRules::SnapToTargetNotIncludingScale,
			WeaponSocket);
	}
}

 

MyWeapon C++ 클래스를 맵에 몇개 배치해두고 위로 지나다니면 충돌 처리시 소켓에 붙게 된다.