Character suddenly stops moving

Development Programming & Scripting C++
1

I have a next problem. In the RTS demo I have send message to character for moving to actor. Character starts moving and irregularly moving.

Character class



UCLASS(BlueprintType)
class AThirdPersonShooterCharacter : public ACharacter
{
	GENERATED_UCLASS_BODY()
public:
        // ...
	UBlackboardComponent* GetBlackboard();

	void MoveToLocation(const FVector& Loc);	
	bool IsMoving() const;
	
	FVector SelectedMovingLocation;

protected:
        // ...
	UPROPERTY()
	AActor* m_MoveTarget;
};

void AThirdPersonShooterCharacter::MoveToLocation(const FVector& Loc)
{
	if (m_MoveTarget == nullptr)
	{
		AActor* A = GetWorld()->SpawnActor(ANavigationTestingActor::StaticClass());

		m_MoveTarget = A;

		if (m_MoveTarget == nullptr)
			return;

		auto BB = GetBlackboard();

		if (BB == nullptr)
			return;

		BB->SetValueAsObject(TEXT("MovingTarget"), m_MoveTarget);
	}
	
	SelectedMovingLocation = Loc;

	if (!IsMoving())
	{
		m_MoveTarget->SetActorLocation(Loc);
		return;
	}

	auto AIController = Cast<AAIController>(Controller);

	if (AIController == nullptr)
		return;
		
	m_MoveTarget->SetActorLocation(Loc);
}


bool AThirdPersonShooterCharacter::IsMoving() const
{
	auto AIController = Cast<AAIController>(Controller);

	if (AIController == nullptr)
		return false;

	return AIController->GetMoveStatus() == EPathFollowingStatus::Moving;
}

UBlackboardComponent* const AThirdPersonShooterCharacter::GetBlackboard() const
{
	if (Controller == nullptr)
		return nullptr;

	auto AIController = Cast<AAIController>(Controller);

	if (AIController == nullptr || AIController->BrainComponent == nullptr)
		return nullptr;

	return AIController->BrainComponent->GetBlackboardComponent();
}

Place a target for my characters:



FHitResult Hit;

if (!GetHitResultUnderCursor(ECC_WorldStatic, false, Hit))
	return;
	
const auto& Loc = Hit.Location;

for (auto Player : Players)
{		
	Player->MoveToLocation(Loc);
	Player->SetUserInput(true);
}

Behavior tree:
32e624301c6fc48970694a9b0ee926d73bb4518b.jpeg

“Before moving” task is simply sets an animation for running.

But my character randomly stops during moving. I was played around with the values of Navigation System agent’s properties but unsuccessfully. My map’s size is 1 square km. Nav agent properties is default.

2

up up

3

Have you checked if the MoveTo is failing? Could be that the path fails or gets blocked somehow and causes the move to fail.

you need to debug what’s going on.

4

It is some problem with garbage collection for arrays. I have resolved this problem.