如何在虚幻引擎 C++ 中检测演员是否被击中？

Question

我是虚幻引擎的新手。我正在尝试创建一个基本游戏，您可以在其中控制球并滚动，尽量不要从管子之类的东西中掉出来。我的球是这样的：

PlayerBall.h

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Pawn.h"
#include "PlayerBall.generated.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="Camera")
    class UCameraComponent* Camera;

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

public: 
    // Called every frame
    void Tick(float DeltaTime) override;

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

};

PlayerBall.cpp

#include "PlayerBall.h"
#include "Camera/CameraComponent.h"

// Sets default values
APlayerBall::APlayerBall() {
    // Set this pawn to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
    PrimaryActorTick.bCanEverTick = true;

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

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

    AutoPossessPlayer = EAutoReceiveInput::Player0;
}

// Called when the game starts or when spawned
void APlayerBall::BeginPlay() {
    Super::BeginPlay();

}

// Called every frame
void APlayerBall::Tick(float DeltaTime) {
    Super::Tick(DeltaTime);

}

// Called to bind functionality to input
void APlayerBall::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent) {
    Super::SetupPlayerInputComponent(PlayerInputComponent);

}

我还有一些其他的障碍物和地板。但是，我也想要一些障碍物，如果它击中你，就会杀死你。我想要APlayerBall 类中的某种方法，当它被击中时调用它，然后我可以检查被击中的actor 的类型。我能做些什么？我使用什么组件？n 我在文档中查找了一个小时，但找不到任何内容。

我尝试添加RecieveHit 方法，但是它说它不会从超类覆盖。我是这样添加的：

void ReceiveHit
(
class UPrimitiveComponent * MyComp,
AActor * Other,
class UPrimitiveComponent * OtherComp,
bool bSelfMoved,
FVector HitLocation,
FVector HitNormal,
FVector NormalImpulse,
const FHitResult & Hit
) override;

Answer 1

您要做的是使用 OnActorHit.AddDynamic(this, &FunctionPointer) 绑定到 AActor::OnActorHit 事件。

RecieveHit 函数是内部函数，将用于广播此事件。

Answer 2

那就是AActor::ReceiveHit，因为 PlayerBall 继承自 APawn，而 APawn 又继承自 AActor。