C++ 典当类用开始重叠事件“虚幻引擎C+”击中自身+；

我做了一个简单的典当类，应该是一个球，四处移动，收集硬币。对于硬币收集系统，我做了重叠事件，当球被击中时通知它。以下是基本代码（APlayerBall是默认的pawn类，生成到游戏中）：

PlayerBall.h

UCLASS()
class ROLLINGBALL_API APlayerBall : public APawn
{
    GENERATED_BODY()

public:
    // Sets default values for this pawn's properties
    APlayerBall();

    UPROPERTY(VisibleAnywhere, Category="Mesh")
    UStaticMeshComponent* Mesh;

    UPROPERTY(VisibleAnywhere, Category="Mesh")
    class UCameraComponent* Camera;

    UPROPERTY(VisibleAnywhere, Category="Mesh")
    class UCapsuleComponent* Capsule;

protected:
    // Called when the game starts or when spawned
    void BeginPlay() override;

    UFUNCTION()
    void BeginOverlap(UPrimitiveComponent* OverlappedComponent, 
                      AActor* OtherActor, 
                      UPrimitiveComponent* OtherComp, 
                      int32 OtherBodyIndex, 
                      bool bFromSweep, 
                      const FHitResult &SweepResult );
public: 
    // Called every frame
    void Tick(float DeltaTime) override;

    // Called to bind functionality to input
    void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;
};

PlayerBall.cpp

建造商：

APlayerBall::APlayerBall() {
    Mesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("Mesh"));
    Mesh->SetStaticMesh(ConstructorHelpers::FObjectFinder<UStaticMesh>(TEXT("StaticMesh'/Game/StarterContent/Shapes/Shape_Sphere.Shape_Sphere'")).Object);
    Mesh->SetSimulatePhysics(true);
    Mesh->SetEnableGravity(true);
    SetRootComponent(Mesh);

    Camera = CreateDefaultSubobject<UCameraComponent>(TEXT("Camera"));
    Camera->SetRelativeLocation(FVector(-500.0f, 0.0f, BaseEyeHeight));
    Camera->SetupAttachment(RootComponent);

    Capsule = CreateDefaultSubobject<UCapsuleComponent>(TEXT("Capsule"));
    Capsule->OnComponentBeginOverlap.AddDynamic(this, &APlayerBall::BeginOverlap);
    Capsule->SetupAttachment(Mesh);

    AutoPossessPlayer = EAutoReceiveInput::Player0;
}

---

如您所见，我添加了日志消息，以查看到底是什么击中了它。经过一点调试，我发现它由于某种原因被自己击中了。游戏一开始，日志屏幕就会显示如下：为什么会发生这种情况？如何修复此问题？

看起来网格组件与胶囊组件重叠。将组件添加到日志中以进行确认

如果您只想知道您的参与者何时与另一个参与者重叠，您可能需要使用

AActor:：NotifyActorBeginOverlap

如果要使用组件重叠，但要忽略自己的actor中其他组件的重叠，则必须在

BeginOverlap

中自己过滤掉它们，或者调整物理碰撞配置文件，以便每个组件都具有不同的对象类型，不会为彼此生成重叠事件。如果是我，我会做这样的过滤器：

void APlayerBall::BeginOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult) {
    if (this == OtherActor) {
        // The Colliding Actor Is Myself. Ignoring because I don't care about this for some reason.
        UE_LOG(LogTemp, Warning, TEXT("Ignoring component overlap of my own components"));
        return;
    }
    UE_LOG(LogTemp, Warning, TEXT("%s"), *OtherActor->GetHumanReadableName());
    UE_LOG(LogTemp, Warning, TEXT("%s"), *GetHumanReadableName());
}

---

我对C++很生疏，但是我认为默认情况下，你应该知道静态网格组件会产生重叠事件。我假设静态网格组件彼此重叠。这对我来说有点像是瞎猜，但我希望这条评论能有所帮助。谢谢！虽然我已经完成了对虚幻引擎的修补，但我觉得这在将来我再次感到无聊时会很有用，所以我会将其标记为已接受。

void APlayerBall::BeginOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult) {
    if (this == OtherActor) {
        // The Colliding Actor Is Myself. Ignoring because I don't care about this for some reason.
        UE_LOG(LogTemp, Warning, TEXT("Ignoring component overlap of my own components"));
        return;
    }
    UE_LOG(LogTemp, Warning, TEXT("%s"), *OtherActor->GetHumanReadableName());
    UE_LOG(LogTemp, Warning, TEXT("%s"), *GetHumanReadableName());
}