적 생성

적 생성 및 AI

몬스터의 이동과 움직임을 구현하였습니다.
이동은 캐릭터와 유사하게 구현하였으며 행동트리는 블랙보드와 비헤이버트리를 이용하여 제작하였습니다.

적 생성

// Sets default values
ASLEnemyBearCharacter::ASLEnemyBearCharacter()
{
	//Controller
	AIControllerClass = ASLBearAIController::StaticClass();
	AutoPossessAI = EAutoPossessAI::PlacedInWorldOrSpawned;

	// Capsule
	GetCapsuleComponent()->InitCapsuleSize(90.f, 80.0f);
	GetCapsuleComponent()->SetCollisionProfileName(TEXT("Pawn"));

	// Movement
	GetCharacterMovement()->bOrientRotationToMovement = true;
	GetCharacterMovement()->RotationRate = FRotator(0.0f, 500.0f, 0.0f);
	GetCharacterMovement()->JumpZVelocity = 500.f;
	GetCharacterMovement()->AirControl = 0.35f;
	GetCharacterMovement()->MaxWalkSpeed = 300.f;
	GetCharacterMovement()->MinAnalogWalkSpeed = 20.f;
	GetCharacterMovement()->BrakingDecelerationWalking = 2000.f;

	// Mesh
	GetMesh()->SetRelativeLocationAndRotation(FVector(0.0f, 0.0f, -90.0f), FRotator(0.0f, -90.0f, 0.0f));
	GetMesh()->SetAnimationMode(EAnimationMode::AnimationBlueprint);
	GetMesh()->SetCollisionProfileName(TEXT("EnemyMesh"));

	// Mesh
	static ConstructorHelpers::FObjectFinder<USkeletalMesh> CharacterMeshRef(TEXT("/Script/Engine.SkeletalMesh'/Game/InfinityBladeAdversaries/Enemy/Enemy_Bear/Enemy_Bear.Enemy_Bear'"));
	if (CharacterMeshRef.Object)
	{
		GetMesh()->SetSkeletalMesh(CharacterMeshRef.Object);
	}

	//Animation
	static ConstructorHelpers::FClassFinder<UAnimInstance> AnimInstanceClassRef(TEXT("/Game/Soulslike/Enemy/Bear/ABP_EnemyBear.ABP_EnemyBear_C"));
	if (AnimInstanceClassRef.Class)
	{
		GetMesh()->SetAnimInstanceClass(AnimInstanceClassRef.Class);
	}
}

float ASLEnemyBearCharacter::GetAIPatrolRadius()
{
	return 800.0f;
}

float ASLEnemyBearCharacter::GetAIDetectRange()
{
	return 400.0f;
}

float ASLEnemyBearCharacter::GetAIAttackRange()
{
	return 200.0f;
}

float ASLEnemyBearCharacter::GetAITurnSpeed()
{
	return 2.0f;
}

void ASLEnemyBearCharacter::SetAIAttackDelegate(const FAICharacterAttackFinished& InOnAttackFinished)
{
	OnAttackFinished = InOnAttackFinished;
}

void ASLEnemyBearCharacter::AttackByAI()
{
	// Movement Setting
	GetCharacterMovement()->SetMovementMode(EMovementMode::MOVE_None);

	// Animation Setting
	const float AttackSpeedRate = 1.0f;
	UAnimInstance* AnimInstance = GetMesh()->GetAnimInstance();
	AnimInstance->Montage_Play(ActionMontage, AttackSpeedRate);

	FOnMontageEnded EndDelegate;
	EndDelegate.BindUObject(this, &ASLEnemyBearCharacter::ComboActionEnd);
	AnimInstance->Montage_SetEndDelegate(EndDelegate, ActionMontage);
}

void ASLEnemyBearCharacter::NotifyActionEnd()
{
	OnAttackFinished.ExecuteIfBound();
}

void ASLEnemyBearCharacter::ComboActionEnd(UAnimMontage* TargetMontage, bool IsProperlyEnded)
{
	GetCharacterMovement()->SetMovementMode(EMovementMode::MOVE_Walking);
}

캐릭터를 구현할 때와 마찬가지로 Capsule/Mesh/Movement 등을 설정해주었습니다.
공격을 구현하여 주었으며 Montage는 BP에서 설정하여주었습니다.

적 AI

EBTNodeResult::Type UBTTask_FindPatrolPos::ExecuteTask(UBehaviorTreeComponent& OwnerComp, uint8* NodeMemory)
{
	APawn* ControllingPawn = OwnerComp.GetAIOwner()->GetPawn();
	if (nullptr == ControllingPawn)
	{
		return EBTNodeResult::Failed;
	}

	UNavigationSystemV1* NavSystem = UNavigationSystemV1::GetNavigationSystem(ControllingPawn->GetWorld());
	if (nullptr == NavSystem)
	{
		return EBTNodeResult::Failed;
	}

	ISLBearAIInterface* AIPawn = Cast<ISLBearAIInterface>(ControllingPawn);
	if (nullptr == AIPawn)
	{
		return EBTNodeResult::Failed;
	}

	FVector Origin = OwnerComp.GetBlackboardComponent()->GetValueAsVector(BBKEY_HOMEPOS);
	float PatrolRadius = AIPawn->GetAIPatrolRadius();
	FNavLocation NextPatrolPos;

	if (NavSystem->GetRandomPointInNavigableRadius(Origin, PatrolRadius, NextPatrolPos))
	{
		OwnerComp.GetBlackboardComponent()->SetValueAsVector(BBKEY_PATROLPOS, NextPatrolPos.Location);
		return EBTNodeResult::Succeeded;
	}

	return EBTNodeResult::Failed;
}

랜덤으로 이동할 위치를 찾는 FindPatrolPos 입니다.
BTTask로 제작하였으며 이동할 위치를 찾으면 Patrol에 저장해 MoveTo를 이용하여 이동하게 만들었습니다.

void UBTService_Detect::TickNode(UBehaviorTreeComponent& OwnerComp, uint8* NodeMemory, float DeltaSeconds)
{
	Super::TickNode(OwnerComp, NodeMemory, DeltaSeconds);

	APawn* ControllingPawn = OwnerComp.GetAIOwner()->GetPawn();
	if (nullptr == ControllingPawn)
	{
		return;
	}

	FVector Center = ControllingPawn->GetActorLocation();
	UWorld* World = ControllingPawn->GetWorld();
	if (nullptr == World)
	{
		return;
	}

	ISLBearAIInterface* AIPawn = Cast<ISLBearAIInterface>(ControllingPawn);
	if (nullptr == AIPawn)
	{
		return;
	}

	float DetectRadius = AIPawn->GetAIDetectRange();

	TArray<FOverlapResult> OverlapResults;
	FCollisionQueryParams CollisionQueryParam(SCENE_QUERY_STAT(Detect), false, ControllingPawn);
	bool bResult = World->OverlapMultiByChannel(
		OverlapResults,
		Center,
		FQuat::Identity,
		CCHANNEL_ABACTION,
		FCollisionShape::MakeSphere(DetectRadius),
		CollisionQueryParam
	);

	//Detect
	if (bResult)
	{
		for (auto const& OverlapResult : OverlapResults)
		{
			APawn* Pawn = Cast<APawn>(OverlapResult.GetActor());
			if (Pawn && Pawn->GetController()->IsPlayerController())
			{
				OwnerComp.GetBlackboardComponent()->SetValueAsObject(BBKEY_TARGET, Pawn);
				DrawDebugSphere(World, Center, DetectRadius, 16, FColor::Green, false, 0.2f);

				DrawDebugPoint(World, Pawn->GetActorLocation(), 10.0f, FColor::Green, false, 0.2f);
				DrawDebugLine(World, ControllingPawn->GetActorLocation(), Pawn->GetActorLocation(), FColor::Green, false, 0.27f);
				return;
			}
		}
	}

	OwnerComp.GetBlackboardComponent()->SetValueAsObject(BBKEY_TARGET, nullptr);
	DrawDebugSphere(World, Center, DetectRadius, 16, FColor::Red, false, 0.2f);
}

적을 찾는 Detected 서비스 입니다.
Pawn을 중심으로 원을 그려 원 안에 플레이어가 없다면 붉은 색을, 있다면 초록색을 return하게 만들었습니다.