블루프린트 엑터를 부모에 붙이기

에셋에 FlashLight가 있어서 한번 써보기로 했다.

두번째 에셋이 FlashLight인데 
코드를 먼저 보여준다면

UObject* SpawnActor = Cast<UObject>(StaticLoadObject(UObject::StaticClass(), NULL, TEXT("/Game/Voyager/Blueprints/BP_FlashLightWeapon.BP_FlashLightWeapon")));

UBlueprint* GeneratedBP = Cast<UBlueprint>(SpawnActor);
if (!SpawnActor)
{
    GEngine->AddOnScreenDebugMessage(2, 5, FColor::Red, FString::Printf(TEXT("CANT FIND OBJECT TO SPAWN")));
    return;
}
UClass* SpawnClass = SpawnActor->StaticClass();
if (SpawnClass == NULL)
{
    GEngine->AddOnScreenDebugMessage(2, 5, FColor::Red, FString::Printf(TEXT("CLASS == NULL")));
    return;
}

UWorld* World = GetWorld();
FActorSpawnParameters SpawnParams;
SpawnParams.Owner = this;
SpawnParams.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AlwaysSpawn;
const USkeletalMeshSocket* BarrelSocket = GetMesh()->GetSocketByName("barrel_socket");
AActor* actor = World->SpawnActor<AActor>(GeneratedBP->GeneratedClass, GetActorLocation(), GetActorRotation(), SpawnParams);
actor->AttachToComponent(GetMesh(), FAttachmentTransformRules::SnapToTargetIncludingScale, "barrel_socket");

 

위와 같이 짯다...

뭐 구글링을 통해서 가져온 것인데 (코드 설명을 위해 접은 글 생략)

UObject* SpawnActor = Cast<UObject>(StaticLoadObject(UObject::StaticClass(), NULL, TEXT("/Game/Voyager/Blueprints/BP_FlashLightWeapon.BP_FlashLightWeapon")))

StaticLoadObject 함수를 사용해서 블루프린트 객체를 가져와야하는 것으로 파악된다.

언리얼 문서를 보면 "오브젝트를 문자열로 가져온다"라고 되어있다.

UBlueprint* GeneratedBP = Cast<UBlueprint>(SpawnActor);

블루프린트로 캐스팅 후 

FActorSpawnParameters SpawnParams;
SpawnParams.Owner = this;
SpawnParams.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AlwaysSpawn;

FActorSpawnParameters를 위와 같이 설정해야 했다.

ESpawnActorCollisionHandlingMethod::AlwaysSpawn 이 부분이 헷갈렸는데

/** Fall back to default settings. */
Undefined								UMETA(DisplayName = "Default"),
/** Actor will spawn in desired location, regardless of collisions. */
AlwaysSpawn								UMETA(DisplayName = "Always Spawn, Ignore Collisions"),
/** Actor will try to find a nearby non-colliding location (based on shape components), but will always spawn even if one cannot be found. */
AdjustIfPossibleButAlwaysSpawn			UMETA(DisplayName = "Try To Adjust Location, But Always Spawn"),
/** Actor will try to find a nearby non-colliding location (based on shape components), but will NOT spawn unless one is found. */
AdjustIfPossibleButDontSpawnIfColliding	UMETA(DisplayName = "Try To Adjust Location, Don't Spawn If Still Colliding"),
/** Actor will fail to spawn. */
DontSpawnIfColliding					UMETA(DisplayName = "Do Not Spawn"),

 

충돌과 스폰이 관련 있는 설정으로 이해했다.

AActor* actor = World->SpawnActor<AActor>(GeneratedBP->GeneratedClass, GetActorLocation(), GetActorRotation(), SpawnParams);
actor->AttachToComponent(GetMesh(), FAttachmentTransformRules::SnapToTargetIncludingScale, "barrel_socket");

SpawnActor를 통해 엑터를 스폰시키고, barrel_socket에 붙였다.

 

완성 ~!