[Unreal] UE4에서의 원시 포인터가 UE5에서 TObjectPtr 바뀐 경우 사용방법

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UE4에서의 원시 포인터가 UE5에서 TObjectPtr 바뀐 경우 사용방법

 

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문제 상황

 

ue4버전

UBlacboardComponent* Blackboard;

 

ue5버전

TObjectPtr<UBlackboardComponent> Blackboard;

로 변경

 

 

UseBlackboard 함수를 사용해야 하는 경우

UBlackBoardComponent*& 을 받아와야하는 경우 문제가 생긴다.

 

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코드 사용

 

UE4

#include "Characters/CAIController.h"
#include "Global.h"
#include "GameFramework/Character.h"
#include "BehaviorTree/BehaviorTree.h"
#include "Characters/CEnemy_AI.h"
#include "Components/CAIBehaviorComponent.h"
#include "Perception/AIPerceptionComponent.h"
#include "BehaviorTree/BlackboardComponent.h"
#include "Perception/AISenseConfig_Sight.h"

ACAIController::ACAIController()
{
	CHelpers::CreateActorComponent<UBlackboardComponent>(this, &Blackboard, "Blackboard");//UE4방식. UBlackboardComponent* Blackboard
	
	CHelpers::CreateActorComponent<UAIPerceptionComponent>(this, &Perception, "Perception");

	Sight = CreateDefaultSubobject<UAISenseConfig_Sight>("Sight");//CreateDefaultSubobject는 생성자 동적할당, UObject는 런타임 동적할당.
	Sight->SightRadius = 600;//시야 반경
	Sight->LoseSightRadius = 800;//시야를 잃는 범위
	Sight->PeripheralVisionAngleDegrees = 45;//시야각
	Sight->SetMaxAge(2);

	Sight->DetectionByAffiliation.bDetectEnemies = true;//적들을 감지o
	Sight->DetectionByAffiliation.bDetectNeutrals = false;//중립 감지x
	Sight->DetectionByAffiliation.bDetectFriendlies = false;//아군 감지x

	Perception->ConfigureSense(*Sight);//감지 객체 지정. 시야감지로 지정.
	Perception->SetDominantSense(*Sight->GetSenseImplementation());//시야감지를 최우선 감지타입으로 설정.
}

void ACAIController::OnPossess(APawn* InPawn)
{
	Super::OnPossess(InPawn);

	Enemy = Cast<ACEnemy_AI>(InPawn);//Enemy에 possess되는 Pawn을 넣어준다.
	SetGenericTeamId(Enemy->GetTeamID());//TeamID 지정

	CheckNull(Enemy->GetBehaviorTree());//Enemy가 BehaviorTree를 가지고 있는지 체크

	UseBlackboard(Enemy->GetBehaviorTree()->BlackboardAsset, Blackboard);


	Behavior = CHelpers::GetComponent<UCAIBehaviorComponent>(Enemy);//Enemy내의 BehaviorComponent를 가져온다.
	Behavior->SetBlackboard(Blackboard);

	RunBehaviorTree(Enemy->GetBehaviorTree());//BehaviorTree 실행
}

AAIController에서 상속받은 Blackboard 변수 그대로 사용.

 

ACAIController::ACAIController()

• CHelpers::CreateActorComponent<UBlackboardComponent>(this, &Blackboard, "Blackboard");

 

void ACAIController::OnPossess(APawn* InPawn)

• UseBlackboard(Enemy->GetBehaviorTree()->BlackboardAsset, Blackboard);

 

 

 

UE5

#include "Characters/CAIController.h"
#include "Global.h"
#include "GameFramework/Character.h"
#include "BehaviorTree/BehaviorTree.h"
#include "Characters/CEnemy_AI.h"
#include "Components/CAIBehaviorComponent.h"
#include "Perception/AIPerceptionComponent.h"
#include "BehaviorTree/BlackboardComponent.h"
#include "Perception/AISenseConfig_Sight.h"

ACAIController::ACAIController()
{
	Blackboard = CreateDefaultSubobject<UBlackboardComponent>(TEXT("Blackboard"));//UE5 방식. TObjectPtr<UBlackboardComponent> Blackboard

	CHelpers::CreateActorComponent<UAIPerceptionComponent>(this, &Perception, "Perception");

	Sight = CreateDefaultSubobject<UAISenseConfig_Sight>("Sight");//CreateDefaultSubobject는 생성자 동적할당, UObject는 런타임 동적할당.
	Sight->SightRadius = 600;//시야 반경
	Sight->LoseSightRadius = 800;//시야를 잃는 범위
	Sight->PeripheralVisionAngleDegrees = 45;//시야각
	Sight->SetMaxAge(2);

	Sight->DetectionByAffiliation.bDetectEnemies = true;//적들을 감지o
	Sight->DetectionByAffiliation.bDetectNeutrals = false;//중립 감지x
	Sight->DetectionByAffiliation.bDetectFriendlies = false;//아군 감지x

	Perception->ConfigureSense(*Sight);//감지 객체 지정. 시야감지로 지정.
	Perception->SetDominantSense(*Sight->GetSenseImplementation());//시야감지를 최우선 감지타입으로 설정.
}

void ACAIController::OnPossess(APawn* InPawn)
{
	Super::OnPossess(InPawn);

	Enemy = Cast<ACEnemy_AI>(InPawn);//Enemy에 possess되는 Pawn을 넣어준다.
	SetGenericTeamId(Enemy->GetTeamID());//TeamID 지정

	CheckNull(Enemy->GetBehaviorTree());//Enemy가 BehaviorTree를 가지고 있는지 체크

	//UE5 방식. UBlackboardComponent*변수를 만들어 Blackboard.Get()을 담아준 후 사용해야 한다.
	UBlackboardComponent* BlackboardTemp = Blackboard.Get();
	UseBlackboard(Enemy->GetBehaviorTree()->BlackboardAsset, BlackboardTemp);//Blackboard 사용을 위해 BlackboardData인 BlackboardAsset과 BlackboardComonent인 Blackboard를 할당한다.
	this->Blackboard = BlackboardTemp;


	Behavior = CHelpers::GetComponent<UCAIBehaviorComponent>(Enemy);//Enemy내의 BehaviorComponent를 가져온다.
	Behavior->SetBlackboard(Blackboard);

	RunBehaviorTree(Enemy->GetBehaviorTree());//BehaviorTree 실행
}

ACAIController::ACAIController()

• Blackboard = CreateDefaultSubobject(TEXT("Blackboard"));

 

UE5 방식. UBlackboardComponent*변수를 만들어 Blackboard.Get()을 담아준 후 사용해야 한다.

 

void ACAIController::OnPossess(APawn* InPawn)

• UBlackboardComponent* BlackboardTemp = Blackboard.Get();
  UseBlackboard(Enemy->GetBehaviorTree()->BlackboardAsset, BlackboardTemp);
  this->Blackboard = BlackboardTemp;

 

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사용 예시2

 

USTRUCT(BlueprintType)
struct FDA_Ability
{
	GENERATED_BODY()

	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly)
	TObjectPtr<const UTexture2D> Icon = nullptr;

	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly)
	TObjectPtr<const UMaterialInterface> BackgroundMaterial = nullptr;
};

 

void UTDUW_SkillIcon::ReceiveDA_Ability(FDA_Ability InDA_Ability)
{
	if (InDA_Ability.InputTag.MatchesTagExact(InputTag))
	{
		if (InDA_Ability.AbilityTag.MatchesTagExact(FTDGameplayTags::GetTDGameplayTags().Abilities_None))
		{
			// TObjectPtr에서 원시포인터 형태로 변환. FDA_Ability에서 const로 선언해서 const를 없애는 대신 const_cast 사용.
			UMaterialInterface* Material_Background = const_cast<UMaterialInterface*>(InDA_Ability.BackgroundMaterial.Get());
			UTexture2D* Texture_Icon = const_cast<UTexture2D*>(InDA_Ability.Icon.Get());
			
            Image_Background->SetBrush(UWidgetBlueprintLibrary::MakeBrushFromMaterial(Material_Background));
			Image_SkillIcon->SetBrush(UWidgetBlueprintLibrary::MakeBrushFromTexture(Texture_Icon));
        }
        // ...
    }
    // ...
}

 

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참고 자료

 

https://uecasts.com/courses/unreal-engine-5-introduction/episodes/ue4-to-ue5-tobjectptr

UE Casts - Premium Unreal Engine 4 Tutorial Screencasts and Unreal Engine 4 Resources

 

https://www.youtube.com/watch?v=uv8hyf3AB-I 

 

 

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