When i initialize my custom USceneComponent, it runs into EXCEPTION_ACCESS_VIOLATION error, caused by component pointer being nullptr.
DynamicCameraComponent.h
UCLASS( ClassGroup=(Custom), meta=(BlueprintSpawnableComponent) )
class LOR2_API UDynamicCameraComponent : public USceneComponent
{
GENERATED_BODY()
UPROPERTY(EditAnywhere)
USpringArmComponent* m_arm;
UPROPERTY(EditAnywhere)
UCameraComponent* m_camera;
public:
UDynamicCameraComponent();
}
DynamicCameraComponent.cpp
UDynamicCameraComponent::UDynamicCameraComponent()
: Super()
{
m_arm = CreateDefaultSubobject<USpringArmComponent>(TEXT("Arm"));
m_arm->TargetArmLength = 85;
m_arm->SetupAttachment(this);
m_camera = CreateDefaultSubobject<UCameraComponent>(TEXT("Camera"));
m_camera->FieldOfView = 75;
m_camera->SetupAttachment(m_arm);
}
Im initializing component using standard method from UE4 Reference Guide:
m_dyna_camera = CreateDefaultSubobject<UDynamicCameraComponent>(TEXT("Dynamic Camera"));
m_dyna_camera->Init(100, 75); //My custom function
m_dyna_camera->SetupAttachment(RootComponent);
But when i try to get the component, it runs into exception with nullptr:
AddMovementInput(m_dyna_camera->GetCamera()->GetForwardVector(), axis * m_props.movementSpeed); // EXCEPTION_ACCESS_VIOLATION m_dyna_camera is nullptr reference
So what is right way to initialize component?
Edit: I figured out, that m_dyna_camera variable gets damaged only when i press “Play” button. Before, at engine startup or levels loading, it initializing right, but gets damaged when i start playing.
Edit 2: I noticed, that in blueprint editor, my inherited component’s default value equals None
Edit 3: After some experiments i figured out, that it’s problem with initalizing children, so what is right way to do it?
